2010 Microchip Technology Inc. Preliminary DS39974A
PIC18F47J13 Family
Data Sheet
28/44-Pin, High-Performance
Microcontrollers with
nanoWatt XLP Technology
DS39974A-page 2 Preliminary 2010 Microchip Technology Inc.
Information contained in this publication regarding device
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and may be superseded by updates. It is your responsibility to
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Trademarks
The Microchip name and logo, the Microchip logo, dsPIC,
KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro, PICSTART,
PIC32 logo, rfPIC and UNI/O are registered trademarks of
Microchip Technology Incorporated in the U.S.A. and other
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MXDEV, MXLAB, SEEVAL and The Embedded Control
Solutions Company are registered trademarks of Microchip
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Analog-for-the-Digital Age, Application Maestro, CodeGuard,
dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN,
ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial
Programming, ICSP, Mindi, MiWi, MPASM, MPLAB Certified
logo, MPLIB, MPLINK, mTouch, Octopus, Omniscient Code
Generation, PICC, PICC-18, PICDEM, PICDEM.net, PICkit,
PICtail, REAL ICE, rfLAB, Select Mode, Total Endurance,
TSHARC, UniWinDriver, WiperLock and ZENA are
trademarks of Microchip Technology Incorporated in the
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SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
© 2010, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
ISBN: 978-1-60932-304-2
Note the following details of the code protection feature on Microchip devices:
• Microchip products meet the specification contained in their particular Microchip Data Sheet.
• Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
• There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
• Microchip is willing to work with the customer who is concerned about the integrity of their code.
• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Microchip received ISO/TS-16949:2002 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California
and India. The Company’s quality system processes and procedures
are for its PIC® MCUs and d sPIC® DSCs, KEELOQ® code hopping
devices, Serial EEPROMs, microperiph erals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
2010 Microchip Technology Inc. Preliminary DS39974A-page 3
PIC18F47J13 FAMILY
Power Management Features with
nanoWatt XLP for Extreme Low Power:
• Deep Sleep mode: CPU Off, Peripherals Off, SRAM Off,
Currents Down to 9 nA and 700 nA with RTCC:
- Able to wake-up on external triggers, programmable WDT
or RTCC alarm
- Ultra Low-Power Wake-up (ULPWU)
• Sleep mode: CPU Off, Peripherals Off, SRAM On, Fast
Wake-up, Currents Down to 0.2 A, 2V Typical
• Idle: CPU Off, SRAM On, Currents Down to
1.7 A Typical
• Run: CPU On, SRAM On, Currents Down to
5.8 A Typical
• Timer1 Oscillator w/RTCC: 0.7 A, 32 kHz Typical
• Watchdog Timer: 0.33 A, 2V Typical
Flexible Oscil lator St ructure:
• Two External Clock modes, Up to 48 MHz (12 MIPS)
• Integrated Crystal/Resonator Driver
• Low-Power 31 kHz Internal RC Oscillator
• Tunable Internal Oscillator (31 kHz to 8 MHz,
±0.15% Typical, ±1% Max.)
• Precision 48 MHz PLL or 4x PLL Options
• Low-Power Secondary Oscillator using Timer1 @ 32 kHz
• Fail-Safe Clock Monitor (FSCM):
- Allows for safe shutdown if any clock stops
• Programmable Reference Clock Output Generator
Peripheral Highlights:
• Peripheral Pin Select:
- Allows independent I/O mapping of many peripherals
- Continuous hardware integrity checking and safety
interlocks prevent unintentional configuration changes
• Hardware Real-Time Clock/Calendar (RTCC):
- Provides clock, calendar and alarm functions
• High-Current Sink/Source 25 mA/25mA
(PORTB and PORTC)
• Four Programmable External Interrupts
• Four Input Change Interrupts
• Three Enhanced Capture/Compare/PWM
(ECCP) modules:
- One, two or four PWM outputs
- Selectable polarity
- Programmable dead time
- Auto-shutdown and auto-restart
- Pulse steering control
Peripheral Highl ights (cont.):
• Seven Capture/Compare/PWM (CCP) modules
• Two Master Synchronous Serial Port (MSSP) modules
featuring:
- 3-wire SPI (all 4 modes)
- SPI Direct Memory Access (DMA) channel
w/1024 byte count
-I
2C™ Master and Slave modes
• 8-Bit Parallel Master Port/Enhanced Parallel Slave Port
• Three Analog Comparators with Input Multiplexing
• 12-Bit Analog-to-Digital (A/D) Converter module:
- Up to 13 input channels
- Auto-acquisition capability
- 10-bit mode for 100 ksps conversion speed
- Conversion available during Sleep
• High/Low-Voltage Detect module
• Charge Time Measurement Unit (CTMU):
- Provides a precise resolution time measurement
for both flow measurement and simple temperature
sensing
- Supports capacitive touch sensing for touch
screens and capacitive switches
• Two Enhanced USART modules:
- Supports RS-485, RS-232 and LIN/J2602
- Auto-wake-up on Start bit
- Auto-Baud Detect (ABD)
S pecial Microcontroller Features:
• 5.5V Tolerant Inputs (digital only pins)
• Low-Power, High-Speed CMOS Flash Technology
• C Compiler Optimized Architecture for Re-Entrant Code
• Priority Levels for Interrupts
• Self-Programmable under Software Control
• 8 x 8 Single-Cycle Hardware Multiplier
• Extended Watchdog Timer (WDT):
- Programmable period from 4 ms to 131s
• Single-Supply In-Circuit Serial Programming™ (ICSP™)
via Two Pins
• In-Circuit Debug (ICD) with 3 Breakpoints via Two Pins
• Operating Voltage Range of 2.0V to 3.6V
• On-Chip 2.5V Regulator
• Flash Program Memory of 10,000 Erase/Write Cycles
Minimum and 20-Year Data Retention
PIC18F47J1 3 Family 28 /44-Pin, High- Perf ormance Microcontr ollers
with nanoWatt XLP Technology
PIC18F47J13 FAMILY
DS39974A-page 4 Preliminary 2010 Microchip Technology Inc.
PIC18F
Device
Pins
Program
Memory
(bytes)
SRAM
(bytes)
Remappable
Pins
Timers
8/16-Bit
ECCP/CCP
EUSART
MSSP
12-Bit
A/D (ch)
Comparators
Deep Sle ep
PMP/PSP
CTMU
RTCC
SPI
w/DMA
I2C™
PIC18F26J13 28 64K 3760 19 4/4 3/7 2 2 Y Y 10 3 Y N Y Y
PIC18F27J13 28 128K 3760 19 4/4 3/7 2 2 Y Y 10 3 Y N Y Y
PIC18F46J13 44 64K 3760 25 4/4 3/7 2 2 Y Y 13 3 Y Y Y Y
PIC18F47J13 44 128K 3760 25 4/4 3/7 2 2 Y Y 13 3 Y Y Y Y
PIC18LF26J13 28 64K 3760 19 4/4 3/7 2 2 Y Y 10 3 N N Y Y
PIC18LF27J13 28 128K 3760 19 4/4 3/7 2 2 Y Y 10 3 N N Y Y
PIC18LF46J13 44 64K 3760 25 4/4 3/7 2 2 Y Y 13 3 N Y Y Y
PIC18LF47J13 44 128K 3760 25 4/4 3/7 2 2 Y Y 13 3 N Y Y Y
2010 Microchip Technology Inc. Preliminary DS39974A-page 5
PIC18F47J13 FAMILY
Pin Diagrams
44-Pin TQFP
Legend: RPn represents remappable pins.Some input and output functions are routed through the Peripheral Pin
Select (PPS) module and can be dynamically assigned to any of the RPn pins. For a list of the input and
output functions, see Table 10-13 and Table 10-14, respectively. For details on configuring the PPS module,
see Section 10.7 “Peripheral Pin Select (PPS)”.
10
11
2
3
6
1
18
19
20
21
22
12
13
14
15
38
8
7
44
43
42
41
40
39
16
17
29
30
31
32
33
23
24
25
26
27
28
36
34
35
9
PIC18F4XJ13
37
RA3/AN3/C1INB/VREF+
RA2/AN2/C2INB/C1IND/C3INB/VREF-/CVREF
RA1/AN1/C2INA/VBG/CTDIN/PMA7/RP1
RA0/AN0/C1INA/ULPWU/PMA6/RP0
MCLR
NC
RB7/CCP7/KBI3/PGD/RP10
RB6/CCP6/KBI2/PGC/RP9
RB5/CCP5/PMA0/KBI1/RP8
RB4/CCP4/PMA1/KBI0/RP7
NC
RC6/CCP9/PMA5/TX1/CK1/RP17
RC5/SDO1/RP16
RC4/SDI1/SDA1/RP15
RD3/PMD3/RP20
RD2/PMD2/RP19
RD1/PMD1/SDA2
RD0/PMD0/SCL2
RC3/SCK1/SCL1/RP14
RC2/AN11/C2IND/CTPLS/RP13
RC1/CCP8/T1OSI/RP12
NC
NC
RC0/T1OSO/T1CKI/RP11
OSC2/CLKO/RA6
OSC1/CLKI/RA7
VSS2
VDD2
RE2/AN7/PMCS
RE1/AN6/PMWR
RE0/AN5/PMRD
RA5/AN4/C1INC/SS1/HLVDIN/RP2
VDDCORE/VCAP
RC7/CCP10/PMA4/RX1/DT1/RP18
RD4/PMD4/RP21
RD5/PMD5/RP22
RD6/PMD6/RP23
VSS1
VDD1
RB0/AN12/C3IND/INT0/RP3
RB1/AN10/C3INC/PMBE/RTCC/RP4
RB2/AN8/C2INC/CTED1/PMA3/REFO/RP5
RB3/AN9/C3INA/CTED2/PMA2/RP6
RD7/PMD7/RP24 5
4
= Pins are up to 5.5V tolerant
PIC18F47J13 FAMILY
DS39974A-page 6 Preliminary 2010 Microchip Technology Inc.
Pin Diagrams (Continued)
44-Pin QFN
Legend: RPn represents remappable pins.Some input and output functions are routed through the Peripheral Pin
Select (PPS) module and can be dynamically assigned to any of the RPn pins. For a list of the input and
output functions, see Table 10-13 and Table 10-14, respectively. For details on configuring the PPS module,
see Section 10.7 “Peripheral Pin Select (PP S)” .
Note: For the QFN package, it is recommended that the bottom pad be connected to VSS.
10
11
2
3
6
1
18
19
20
21
22
12
13
14
15
38
8
7
44
43
42
41
40
39
16
17
29
30
31
32
33
23
24
25
26
27
28
36
34
35
9
PIC18F4XJ13
37
RA3/AN3/C1INB/VREF+
RA2/AN2/C2INB/C1IND/C3INB/VREF-/CVREF
RA1/AN1/C2INA/VBG/CTDIN/PMA7/RP1
RA0/AN0/C1INA/ULPWU/PMA6/RP0
MCLR
RB7/CCP7/KBI3/PGD/RP10
RB6/CCP6/KBI2/PGC/RP9
RB5/CCP5/PMA0/KBI1/RP8
RB4/CCP4/PMA1/KBI0/RP7
NC
RC6/CCP9/PMA5/TX1/CK1/RP17
RC5/SDO1/RP16
RC4/SDI1/SDA1/RP15
RD3/PMD3/RP20
RD2/PMD2/RP1
RD1/PMD1/SDA2
RD0/PMD0/SCL2
RC3/SCK1/SCL1/RP14
RC2/AN11/C2IND/CTPLS/RP13
RC1/CCP8/T1OSI/RP12
RC0/T1OSO/T1CKI/RP11
OSC2/CLKO/RA6
OSC1/CLKI/RA7
VSS2
AVDD2
RE2/AN7/PMCS
RE1/AN6/PMWR
RE0/AN5/PMRD
RA5/AN4/C1INC/SS1/HLVDIN/RP2
VDDCORE/VCAP
RC7/CCP10/PMA4/RX1/DT1/RP18
RD4/PMD4/RP21
RD5/PMD5/RP22
RD6/PMD6/RP23
VSS1
VDD1
RB0/AN12/C3IND/INT0/RP3
RB1/AN10/C3INC/PMBE/RTCC/RP4
RB2/AN8/C2INC/CTED1/PMA3/REFO/RP5
RB3/AN9/C3INA/CTED2/PMA2/RP6
RD7/PMD7/RP24 5
4AVSS1
VDD2
AVDD1
= Pins are up to 5.5V tolerant
2010 Microchip Technology Inc. Preliminary DS39974A-page 7
PIC18F47J13 FAMILY
Pin Diagrams (Continued)
28-Pi n SPDIP/SO IC /S S OP
28-Pin QFN
Legend: RPn represents remappable pins.Some input and output functions are routed through the Peripheral Pin
Select (PPS) module and can be dynamically assigned to any of the RPn pins. For a list of the input and
output functions, see Table 10-13 and Table 10-14, respectively. For details on configuring the PPS module,
see Section 10.7 “Peripheral Pin Select (PP S)” .
Note: For the QFN package, it is recommended that the bottom pad be connected to VSS.
PIC18F2XJ13
10
11
2
3
4
5
6
1
8
7
9
12
13
14 15
16
17
18
19
20
23
24
25
26
27
28
22
21
MCLR
RA0/AN0/C1INA/ULPWU/RP0
RA1/AN1/C2INA/VBG/CTDIN/RP1
RA2/AN2/C2INB/C1IND/C3INB/VREF-/CVREF
RA3/AN3/C1INB/VREF+
VDDCORE/VCAP
RA5/AN4/C1INC/SS1/HLVDIN/RP2
VSS1
OSC1/CLKI/RA7
OSC2/CLKO/RA6
RC0/T1OSO/T1CKI/RP11
RC1/CCP8/T1OSI/RP12
RC2/AN11/C2IND/CTPLS/RP13
RC3/SCK1/SCL1/RP14
RB7/CCP7/KBI3/PGD/RP10
RB6/CCP6/KBI2/PGC/RP9
RB5/CCP5/KBI1/SDA2/RP8
RB4/CCP4/KBI0/SCL2/RP7
RB3/AN9/C3INA/CTED2/RP6
RB2/AN8/C2INC/CTED1/REFO/RP5
RB1/AN10/C3INC/RTCC/RP4
RB0/AN12/C3IND/INT0/RP3
VDD
VSS2
RC7/CCP10/RX1/DT1/RP18
RC6/CCP9/TX1/CK1/RP17
RC5/SDO1/RP16
RC4/SDI1/SDA1/RP15
= Pins are up to 5.5V tolerant
10 11
2
3
6
1
18
19
20
21
22
12 13 14
15
8
7
16
17
232425262728
9
PIC18F2XJ13
RC0/T1OSO/T1CKI/RP11
5
4
RB7/CCP7/KBI3/PGD/RP10
RB6/CCP6/KBI2/PGC/RP9
RB5/CCP5/KBI1/SDA2/RP8
RB4/CCP4/KBI0/SCL2/RP7
RB3/AN9/C3INA/CTED2/RP6
RB2/AN8/C2INC/CTED1/REFO/RP5
RB1/AN10/C3INC/RTCC/RP4
RB0/AN12/C3IND/INT0/RP3
VDD
VSS2
RC7/CCP10/RX1/DT1/RP18
RC6/CCP9/TX1/CK1/RP17
RC5/SDO1/RP16
RC4/SDI1/SDA1/RP15
MCLR
RA0/AN0/C1INA/ULPWU/RP0
RA1/AN1/C2INA/VBG/CTDIN/RP1
RA2/AN2/C1INB/C1IND/C3INB/VREF-/CVREF
RA3/AN3/C1INB/VREF+
VDDCORE/VCAP
RA5/AN4/C1INC/SS1/HLVDIN/RP2
VSS1
OSC1/CLKI/RA7
OSC2/CLKO/RA6
RC1/CCP8/T1OSI/RP12
RC2/AN11/C2IND/CTPLS/RP13
RC3/SCK1/SCL1/RP14
PIC18F47J13 FAMILY
DS39974A-page 8 Preliminary 2010 Microchip Technology Inc.
Table of Contents
1.0 Device Overview ........................................................................................................................................................................ 11
2.0 Guidelines for Getting Started with PIC18FJ Microcontrollers ................................................................................................... 31
3.0 Oscillator Configurations ............................................................................................................................................................ 35
4.0 Low-Power Modes...................................................................................................................................................................... 47
5.0 Reset .......................................................................................................................................................................................... 65
6.0 Memory Organization ................................................................................................................................................................. 81
7.0 Flash Program Memory............................................................................................................................................................ 107
8.0 8 x 8 Hardware Multiplier.......................................................................................................................................................... 117
9.0 Interrupts .................................................................................................................................................................................. 119
10.0 I/O Ports ................................................................................................................................................................................... 139
11.0 Parallel Master Port (PMP)....................................................................................................................................................... 179
12.0 Timer0 Module ......................................................................................................................................................................... 205
13.0 Timer1 Module ......................................................................................................................................................................... 209
14.0 Timer2 Module ......................................................................................................................................................................... 219
15.0 Timer3/5 Module ...................................................................................................................................................................... 221
16.0 Timer4/6/8 Module ................................................................................................................................................................... 233
17.0 Real-Time Clock and Calendar (RTCC) ................................................................................................................................... 237
18.0 Capture/Compare/PWM (CCP) Modules ................................................................................................................................. 257
19.0 Enhanced Capture/Compare/PWM (ECCP) Module................................................................................................................ 269
20.0 Master Synchronous Serial Port (MSSP) Module .................................................................................................................... 291
21.0 Enhanced Universal Synchronous Asynchronous Receiver Transmitter (EUSART) ............................................................... 345
22.0 10/12-bit Analog-to-Digital Converter (A/D) Module................................................................................................................. 367
23.0 Comparator Module.................................................................................................................................................................. 379
24.0 Comparator Voltage Reference Module................................................................................................................................... 387
25.0 High/Low Voltage Detect (HLVD)............................................................................................................................................. 391
26.0 Charge Time Measurement Unit (CTMU) ................................................................................................................................ 397
27.0 Special Features of the CPU.................................................................................................................................................... 415
28.0 Instruction Set Summary .......................................................................................................................................................... 433
29.0 Development Support............................................................................................................................................................... 483
30.0 Electrical Characteristics .......................................................................................................................................................... 487
31.0 Packaging Information.............................................................................................................................................................. 529
Appendix A: Revision History............................................................................................................................................................. 541
Appendix B: Migration From PIC18F46J11 to PIC18F47J13............................................................................................................. 541
The Microchip Web Site..................................................................................................................................................................... 555
Customer Change Notification Service .............................................................................................................................................. 555
Customer Support .............................................................................................................................................................................. 555
Reader Response .............................................................................................................................................................................. 556
Product Identification System............................................................................................................................................................. 557
2010 Microchip Technology Inc. Preliminary DS39974A-page 9
PIC18F47J13 FAMILY
TO OUR VALUED CUSTOMERS
It is our intention to provide our valued customers with the best documentation possible to ensure successful use of your Microchip
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The last character of the literature number is the version number, (e.g., DS30000A is version A of document DS30000).
Errata
An errata sheet, describing minor operational differences from the data sheet and recommended workarounds, may exist for current
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To determine if an errata sheet exists for a particular device, please check with one of the following:
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PIC18F47J13 FAMILY
DS39974A-page 10 Preliminary 2010 Microchip Technology Inc.
NOTES:
2010 Microchip Technology Inc. Preliminary DS39974A-page 11
PIC18F47J13 FAMILY
1.0 DEVICE OVERVIEW
This document contains device-specific information for
the following devices:
1.1 Core Features
1.1.1 nanoWatt XLP TECHNOLOGY
All of the devices in the PIC18F47J13 family incorpo-
rate a range of features that can significantly reduce
power consumption during operation. Key features are:
•Alternate Run Modes: By clocking the controller
from the Timer1 source or the internal RC
oscillator, power consumption during code
execution can be reduced by as much as 90%.
•Multiple Idle Modes: The controller can also run
with its CPU core disabled but the peripherals still
active. In these states, power consumption can be
reduced even further, to as little as 4% of normal
operational requirements.
•On-the-Fly Mode Switching: The
power-managed modes are invoked by user code
during operation, allowing the users to incorporate
power-saving ideas into their application’s
software design.
•Deep Sleep: The 2.5V internal core voltage regu-
lator on F parts can be shutdown to cut power
consumption to as low as 15 nA (typical). Certain
features can remain operating during Deep Sleep,
such as the Real-Time Clock Calendar.
•Ultra Low Power Wake-Up: Waking from Sleep
or Deep Sleep modes after a period of time can
be done without an oscillator/clock source, saving
power for applications requiring periodic activity.
1.1.2 OSCILLATOR OPTIONS AND
FEATURES
All of the devices in the PIC18F47J13 family offer five
different oscillator options, allowing users a range of
choices in developing application hardware. These
include:
• Two Crystal modes, using crystals or ceramic
resonators.
• Two External Clock modes, offering the option of
a divide-by-4 clock output.
• An internal oscillator block, which provides an
8 MHz clock and an INTRC source (approxi-
mately 31 kHz, stable over temperature and VDD),
as well as a range of six user selectable clock
frequencies, between 125 kHz to 4 MHz, for a
total of eight clock frequencies. This option frees
an oscillator pin for use as an additional general
purpose I/O.
• A Phase Lock Loop (PLL) frequency multiplier
available to the high-speed crystal, and external
and internal oscillators, providing a clock speed
up to 48 MHz.
The internal oscillator block provides a stable reference
source that gives the PIC18F47J13 family additional
features for robust operation:
•Fail-Safe Clock Monitor: This option constantly
monitors the main clock source against a reference
signal provided by the internal oscillator. If a clock
failure occurs, the controller is switched to the
internal oscillator, allowing for continued low-speed
operation or a safe application shutdown.
•Two-S pe ed S tart-up: This option allows the
internal oscillator to serve as the clock source
from Power-on Reset (POR), or wake-up from
Sleep mode, until the primary clock source is
available.
• PIC18F26J13 • PIC18LF 26J13
• PIC18F27J13 • PIC18LF27J13
• PIC18F46J13 • PIC18LF46J13
• PIC18F47J13 • PIC18LF47J13
PIC18F47J13 FAMILY
DS39974A-page 12 Preliminary 2010 Microchip Technology Inc.
1.1.3 EXPANDED MEMORY
The PIC18F47J13 family provides ample room for
application code, from 64 Kbytes to 128 Kbytes of code
space. The Flash cells for program memory are rated
to last in excess of 10000 erase/write cycles. Data
retention without refresh is conservatively estimated to
be greater than 20 years.
The Flash program memory is readable and writable
during normal operation. The PIC18F47J13 family also
provides plenty of room for dynamic application data
with up to 3.8 Kbytes of data RAM.
1.1.4 EXTENDED INSTRUCTION SET
The PIC18F47J13 family implements the optional
extension to the PIC18 instruction set, adding eight
new instructions and an Indexed Addressing mode.
Enabled as a device configuration option, the extension
has been specifically designed to optimize re-entrant
application code originally developed in high-level
languages, such as C.
1.1.5 EASY MIGRATION
Regardless of the memory size, all devices share the
same rich set of peripherals, allowing for a smooth
migration path as applications grow and evolve.
The consistent pinout scheme used throughout the entire
family also aids in migrating to the next larger device.
The PIC18F47J13 family is also pin compatible with
other PIC18 families, such as the PIC18F4550,
PIC18F2450 and PIC18F46J50. This allows a new
dimension to the evolution of applications, allowing
developers to select different price points within
Microchip’s PIC18 portfolio, while maintaining the
same feature set.
1.2 Other Special Features
•Communications: The PIC18F47J13 family
incorporates a range of serial and parallel com-
munication peripherals. This device includes two
independent Enhanced USARTs and two Master
Synchronous Serial Port (MSSP) modules,
capable of both Serial Peripheral Interface (SPI)
and I2C™ (Master and Slave) modes of opera-
tion. The device also has a parallel port and can
be configured to serve as either a Parallel Master
Port (PMP) or as a Parallel Slave Port (PSP).
•CCP/ECCP Modules: All devices in the family
incorporate seven Capture/Compare/PWM (CCP)
modules and three Enhanced Capture/Com-
pare/PWM (ECCP) modules to maximize flexibility
in control applications. ECCPs offer up to four
PWM output signals each. The ECCPs also offer
many beneficial features, including polarity
selection, programmable dead time,
auto-shutdown and restart and Half-Bridge and
Full-Bridge Output modes.
•10/12-Bit A/D Converter: This module incorpo-
rates programmable acquisition time, allowing for
a channel to be selected and a conversion to be
initiated without waiting for a sampling period, and
thus, reducing code overhead.
•Extended Watchdog Timer (WDT): This
enhanced version incorporates a 16-bit prescaler,
allowing an extended time-out range that is stable
across operating voltage and temperature. See
Section 30.0 “Electrical Characteristics” for
time-out periods.
1.3 Details on Indi vidual Family
Devices
Devices in the PIC18F47J13 family are available in
28-pin and 44-pin packages. Block diagrams for the
two groups are shown in Figure 1-1 and Figure 1-2.
The devices are differentiated from each other in
two ways:
• Flash program memory (two sizes: 64 Kbytes for
the PIC18FX6J13 and 128 Kbytes for
PIC18FX7J13)
• I/O ports (three bidirectional ports on 28-pin
devices, five bidirectional ports on 44-pin devices)
All other features for devices in this family are identical.
These are summarized in Table 1-1 and Table 1-2.
The pinouts for the PIC18F2XJ13 devices are listed in
Table 1-3. The pinouts for the PIC18F4XJ13 devices
are shown in Table 1-4.
The PIC18F47J13 family of devices provides an
on-chip voltage regulator to supply the correct voltage
levels to the core. Parts designated with an “F” part
number (such as PIC18F47J13) have the voltage
regulator enabled.
These parts can run from 2.15V-3.6V on VDD, but should
have the VDDCORE pin connected to VSS through a
low-ESR capacitor. Parts designated with an “LF” part
number (such as PIC18LF47J13) do not enable the volt-
age regulator nor support Deep Sleep mode. For “LF”
parts, an external supply of 2.0V-2.7V has to be supplied
to the VDDCORE pin while 2.0V-3.6V can be supplied to
VDD (VDDCORE should never exceed VDD).
For more details about the internal voltage regulator,
see Section 27.3 “On-Chip Voltage Regulator”.
2010 Microchip Technology Inc. Preliminary DS39974A-page 13
PIC18F47J13 FAMILY
TABLE 1-1: DEVICE FEATURES FOR THE PIC18F2XJ13 (28-PIN DEVICES)
TABLE 1-2: DEVICE FEATURES FOR THE PIC18F4XJ13 (44-PIN DEVICES)
Features PIC18F26J13 PIC18F27J13
Operating Frequency DC – 48 MHz DC – 48 MHz
Program Memory (Kbytes) 64 128
Program Memory (Instructions) 32,768 65,536
Data Memory (Kbytes) 3.8 3.8
Interrupt Sources 30
I/O Ports Ports A, B, C
Timers 8
Enhanced Capture/Compare/PWM Modules 3 ECCP and 7 CCP
Serial Communications MSSP (2), Enhanced USART (2)
Parallel Communications (PMP/PSP) No
10/12-Bit Analog-to-Digital Module 10 Input Channels
Resets (and Delays) POR, BOR, RESET Instruction, Stack Full, Stack Underflow, MCLR, WDT
(PWRT, OST)
Instruction Set 75 Instructions, 83 with Extended Instruction Set Enabled
Packages 28-Pin QFN, SOIC, SSOP and SPDIP (300 mil)
Features PIC18F46J13 PIC18F47J13
Operating Frequency DC – 48 MHz DC – 48 MHz
Program Memory (Kbytes) 64 128
Program Memory (Instructions) 32,768 65,536
Data Memory (Kbytes) 3.8 3.8
Interrupt Sources 30
I/O Ports Ports A, B, C, D, E
Timers 8
Enhanced Capture/Compare/PWM Modules 3 ECCP and 7 CCP
Serial Communications MSSP (2), Enhanced USART (2)
Parallel Communications (PMP/PSP) Yes
10/12-Bit Analog-to-Digital Module 13 Input Channels
Resets (and Delays) POR, BOR, RESET Instruction, Stack Full, Stack Underflow, MCLR, WDT
(PWRT, OST)
Instruction Set 75 Instructions, 83 with Extended Instruction Set Enabled
Packages 44-Pin QFN and TQFP
PIC18F47J13 FAMILY
DS39974A-page 14 Preliminary 2010 Microchip Technology Inc.
FIGU RE 1- 1 : PIC1 8F 2XJ 13 ( 28 -P IN ) B LOC K DI AG R AM
Instruction
Decode and
Control
PORTA
Data Latch
Data Memory
(3.8 Kbytes)
Address Latch
Data Address<12>
12
Access
BSR FSR0
FSR1
FSR2
inc/dec
logic
Address
412 4
PCH PCL
PCLATH
8
31-Level Stack
Program Counter
PRODLPRODH
8 x 8 Multiply
8
BITOP
8
8
ALU<8>
Address Latch
Program Memory
Data Latch
20
8
8
Table Pointer<21>
inc/dec logic
21
8
Data Bus<8>
Table Latch
8
IR
12
3
PCLATU
PCU
Note 1: See Table 1-3 for I/O port pin descriptions.
2: BOR functionality is provided when the on-board voltage regulator is enabled.
EUSART1
Comparators
MSSP1
Timer2Timer1 Timer3Timer0
ADC
W
Instruction Bus <16>
STKPTR Bank
8
State Machine
Control Signals
Decode
8
8
EUSART2
ROM Latch
MSSP2
PORTC
RA0:RA7(1)
RC0:RC7(1)
PORTB
RB0:RB7(1)
Timer4
OSC1/CLKI
OSC2/CLKO
VDD,
8 MHz
INTOSC
VSS MCLR
Power-up
Timer
Oscillator
Start-up Timer
Power-on
Reset
Watchdog
Timer
Brown-out
Reset(2)
Precision
Reference
Band Gap
INTRC
Oscillator
Regulator
Voltage
VDDCORE/VCAP
CTMU
Timing
Generation
HLVD
RTCC
ECCP1 ECCP2 ECCP3 CCP4 CCP5 CCP6 CCP7 CCP8 CCP9 CCP10
Timer5 Timer6 Timer8
2010 Microchip Technology Inc. Preliminary DS39974A-page 15
PIC18F47J13 FAMILY
FIGU RE 1- 2 : PIC1 8F 4XJ 13 ( 44 -P IN ) B LOC K DI AG R AM
PRODLPRODH
8 x 8 Multiply
8
BITOP
8
8
ALU<8>
8
8
3
W8
8
8
Instruction
Decode and
Control
Data Latch
Address Latch
Data Address<12>
12
Access
BSR FSR0
FSR1
FSR2
inc/dec
logic
Address
412 4
PCH PCL
PCLATH
8
31-Level Stack
Program Counter
Address Latch
Program Memory
Data Latch
20
Table Pointer<21>
inc/dec logic
21
8
Data Bus<8>
Table Latch
8
IR
12
ROM Latch
PCLATU
PCU
Instruction Bus <16>
STKPTR Bank
State Machine
Control Signals
Decode
System Bus Interface
AD<15:0>, A<19:16>
(Multiplexed with PORTD
and PORTE)
PORTA
PORTC
PORTD
PORTE
RA0:RA7(1)
RC0:RC7(1)
RD0:RD7(1)
RE0:RE2(1)
PORTB
RB0:RB7(1)
Note 1: See Table 1-3 for I/O port pin descriptions.
2: The on-chip voltage regulator is always enabled by default.
Data Memory
(3.8 Kbytes)
OSC1/CLKI
OSC2/CLKO
VDD,VSS MCLR
Power-up
Timer
Oscillator
Start-up Timer
Power-on
Reset
Watchdog
Timer
Brown-out
Reset(2)
VDDCORE/VCAP
EUSART1
Comparators
MSSP1
Timer2Timer1 Timer3Timer0
ADC
EUSART2 MSSP2
Timer4
CTMU
HLVD
RTCC
ECCP1 ECCP2 ECCP3 CCP4 CCP5 CCP6 CCP7 CCP8 CCP9 CCP10
Timer5 Timer6 Timer8
8 MHz
INTOSC
Precision
Reference
Band Gap
INTRC
Oscillator
Regulator
Voltage
Timing
Generation
PIC18F47J13 FAMILY
DS39974A-page 16 Preliminary 2010 Microchip Technology Inc.
TABLE 1-3: PIC18F2XJ13 PINOUT I/O DESCRIPTIONS
Pin Name
Pin Number
Pin
Type Buffer
Type Description
28-SPDIP/
SSOP/
SOIC 28-QFN
MCLR 1(2) 26(2) I ST Master Clear (Reset) input. This pin is an
active-low Reset to the device.
OSC1/CLKI/RA7
OSC1
CLKI
RA7(1)
96
I
I
I/O
ST
CMOS
TTL/DIG
Oscillator crystal or external clock input.
Oscillator crystal input or external clock source
input. ST buffer when configured in RC mode;
CMOS otherwise. Main oscillator input
connection.
External clock source input; always associated
with pin function, OSC1 (see related
OSC1/CLKI pins).
Digital I/O.
OSC2/CLKO/RA6
OSC2
CLKO
RA6(1)
10 7
O
O
I/O
—
DIG
TTL/DIG
Oscillator crystal or clock output.
Oscillator crystal output. Connects to crystal or
resonator in Crystal Oscillator mode.
Main oscillator feedback output connection.
In RC mode, OSC2 pin outputs CLKO, which
has 1/4 the frequency of OSC1 and denotes
the instruction cycle rate.
Digital I/O.
Legend: TTL = TTL compatible input CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels Analog = Analog input
I = Input O = Output
P = Power OD = Open-Drain (no P diode to VDD)
DIG = Digital output I2C™ = Open-Drain, I2C specific
Note 1: RA7 and RA6 will be disabled if OSC1 and OSC2 are used for the clock function.
2: 5.5V tolerant.
2010 Microchip Technology Inc. Preliminary DS39974A-page 17
PIC18F47J13 FAMILY
PORTA is a bidirectional I/O port.
RA0/AN0/C1INA/ULPWU/RP0
RA0
AN0
C1INA
ULPWU
RP0
227
I/O
I
I
I
I/O
TTL/DIG
Analog
Analog
Analog
ST/DIG
Digital I/O.
Analog Input 0.
Comparator 1 Input A.
Ultra low-power wake-up input.
Remappable Peripheral Pin 0 input/output.
RA1/AN1/C2INA/VBG/CTDIN/
RP1
RA1
AN1
C2INA
VBG
CTDIN
RP1
328
I/O
O
I
O
I
I/O
TTL/DIG
Analog
Analog
Analog
ST
ST/DIG
Digital I/O.
Analog Input 1.
Comparator 2 Input A.
Band Gap Reference Voltage (VBG) output.
CTMU pulse delay input.
Remappable Peripheral Pin 1 input/output.
RA2/AN2/C2INB/C1IND/
C3INB/VREF-/CVREF
RA2
AN2
C2INB
C1IND
C3INB
VREF-
CVREF
41
I/O
I
I
I
I
O
I
TTL/DIG
Analog
Analog
Analog
Analog
Analog
Analog
Digital I/O.
Analog Input 2.
Comparator 2 Input B.
Comparator 1 Input D.
Comparator 3 Input B.
A/D reference voltage (low) input.
Comparator reference voltage output.
RA3/AN3/C1INB/VREF+
RA3
AN3
C1INB
VREF+
52
I/O
I
I
I
TTL/DIG
Analog
Analog
Analog
Digital I/O.
Analog Input 3.
Comparator 1 Input B.
A/D reference voltage (high) input.
RA5/AN4/C1INC/SS1/
HLVDIN/RP2
RA5
AN4
C1INC
SS1
HLVDIN
RP2
74
I/O
I
I
I
I
I/O
TTL/DIG
Analog
Analog
TTL
Analog
ST/DIG
Digital I/O.
Analog Input 4.
Comparator 1 Input C.
SPI slave select input.
High/Low-Voltage Detect input.
Remappable Peripheral Pin 2 input/output.
RA6(1)
RA7(1) See the OSC2/CLKO/RA6 pin.
See the OSC1/CLKI/RA7 pin.
TABLE 1-3: PIC18F2XJ13 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number
Pin
Type Buffer
Type Description
28-SPDIP/
SSOP/
SOIC 28-QFN
Legend: TTL = TTL compatible input CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels Analog = Analog input
I = Input O = Output
P = Power OD = Open-Drain (no P diode to VDD)
DIG = Digital output I2C™ = Open-Drain, I2C specific
Note 1: RA7 and RA6 will be disabled if OSC1 and OSC2 are used for the clock function.
2: 5.5V tolerant.
PIC18F47J13 FAMILY
DS39974A-page 18 Preliminary 2010 Microchip Technology Inc.
PORTB is a bidirectional I/O port. PORTB can be
software programmed for internal weak pull-ups
on all inputs.
RB0/AN12/C3IND/INT0/RP3
RB0
AN12
C3IND
INT0
RP3
21 18
I/O
I
I
I
I/O
TTL/DIG
Analog
Analog
ST
ST/DIG
Digital I/O.
Analog Input 12.
Comparator 3 Input D.
External Interrupt 0.
Remappable Peripheral Pin 3 input/output.
RB1/AN10/C3INC/RTCC/RP4
RB1
AN10
C3INC
RTCC
RP4
22 19
I/O
I
I
O
I/O
TTL/DIG
Analog
Analog
DIG
ST/DIG
Digital I/O.
Analog Input 10.
Comparator 3 input.
Real-Time Clock Calendar output.
Remappable Peripheral Pin 4 input/output.
RB2/AN8/C2INC/CTED1/
REFO/RP5
RB2
AN8
C2INC
CTED1
REFO
RP5
23 20
I/O
I
I
I
O
I/O
TTL/DIG
Analog
Analog
ST
DIG
ST/DIG
Digital I/O.
Analog Input 8.
Comparator 2 Input C.
CTMU Edge 1 input.
Reference output clock.
Remappable Peripheral Pin 5 input/output.
RB3/AN9/C3INA/CTED2/
RP6
RB3
AN9
C3INA
CTED2
RP6
24 21
I/O
I
I
I
I
TTL/DIG
Analog
Analog
ST
ST/DIG
Digital I/O.
Analog Input 9.
Comparator 3 Input A.
CTMU edge 2 Input.
Remappable Peripheral Pin 6 input/output.
TABLE 1-3: PIC18F2XJ13 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number
Pin
Type Buffer
Type Description
28-SPDIP/
SSOP/
SOIC 28-QFN
Legend: TTL = TTL compatible input CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels Analog = Analog input
I = Input O = Output
P = Power OD = Open-Drain (no P diode to VDD)
DIG = Digital output I2C™ = Open-Drain, I2C specific
Note 1: RA7 and RA6 will be disabled if OSC1 and OSC2 are used for the clock function.
2: 5.5V tolerant.
2010 Microchip Technology Inc. Preliminary DS39974A-page 19
PIC18F47J13 FAMILY
PORTB (continued)
RB4/CCP4/KBI0/SCL2/RP7
RB4
CCP4
KBI0
SCL2
RP7
25(2) 22(2)
I/O
I/O
I
I/O
I/O
TTL/DIG
ST/DIG
TTL
I2C™
ST/DIG
Digital I/O.
Capture/Compare/PWM input/output.
Interrupt-on-change pin.
I2C clock input/output.
Remappable Peripheral Pin 7 input/output.
RB5/CCP5/KBI1/SDA2/RP8
RB5
CCP5
KBI1
SDA2
RP8
26(2) 23(2)
I/O
I/O
I
I/O
I/O
TTL/DIG
ST/DIG
TTL
I2C
ST/DIG
Digital I/O.
Capture/Compare/PWM input/output.
Interrupt-on-change pin.
I2C data input/output.
Remappable Peripheral Pin 8 input/output.
RB6/CCP6/KBI2/PGC/RP9
RB6
CCP6
KBI2
PGC
RP9
27(2) 24(2)
I/O
I/O
I
I
I/O
TTL/DIG
ST/DIG
TTL
ST
ST/DIG
Digital I/O.
Capture/Compare/PWM input/output.
Interrupt-on-change pin.
ICSP™ clock input.
Remappable Peripheral Pin 9 input/output.
RB7/CCP7/KBI3/PGD/RP10
RB7
CCP7
KBI3
PGD
RP10
28(2) 25(2)
I/O
I/O
I
I/O
I/O
TTL/DIG
ST/DIG
TTL
ST/DIG
ST/DIG
Digital I/O.
Capture/Compare/PWM input/output.
Interrupt-on-change pin.
In-Circuit Debugger and ICSP programming
data pin.
Remappable Peripheral Pin 10 input/output.
TABLE 1-3: PIC18F2XJ13 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number
Pin
Type Buffer
Type Description
28-SPDIP/
SSOP/
SOIC 28-QFN
Legend: TTL = TTL compatible input CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels Analog = Analog input
I = Input O = Output
P = Power OD = Open-Drain (no P diode to VDD)
DIG = Digital output I2C™ = Open-Drain, I2C specific
Note 1: RA7 and RA6 will be disabled if OSC1 and OSC2 are used for the clock function.
2: 5.5V tolerant.
PIC18F47J13 FAMILY
DS39974A-page 20 Preliminary 2010 Microchip Technology Inc.
PORTC is a bidirectional I/O port.
RC0/T1OSO/T1CKI/RP11
RC0
T1OSO
T1CKI
RP11
11 8
I/O
O
I
I/O
ST/DIG
Analog
ST
ST/DIG
Digital I/O.
Timer1 oscillator output.
Timer1 external digital clock input.
Remappable Peripheral Pin 11 input/output.
RC1/CCP8/T1OSI/RP12
RC1
CCP8
T1OSI
RP12
12 9
I/O
I/O
I
I/O
ST/DIG
ST/DIG
Analog
ST/DIG
Digital I/O.
Capture/Compare/PWM input/output.
Timer1 oscillator input.
Remappable Peripheral Pin 12 input/output.
RC2/AN11/C2IND/CTPLS/RP13
RC2
AN11
C2IND
CTPLS
RP13
13 10
I/O
I
I
O
I/O
ST/DIG
Analog
Analog
DIG
ST/DIG
Digital I/O.
Analog Input 11.
Comparator 2 Input D.
CTMU pulse generator output.
Remappable Peripheral Pin 13 input/output.
RC3/SCK1/SCL1/RP14
RC3
SCK1
SCL1
RP14
14 11
I/O
I/O
I/O
I/O
ST/DIG
ST/DIG
I2C
ST/DIG
Digital I/O.
SPI clock input/output.
I2C clock input/output.
Remappable Peripheral Pin 14 input/output.
RC4/SDI1/SDA1/RP15
RC4
SDI1
SDA1
RP15
15 12
I/O
I
I/O
I/O
ST/DIG
ST
I2C™
ST/DIG
Digital I/O.
SPI data input.
I2C data input/output.
Remappable Peripheral Pin 15 input/output.
RC5/SDO1/RP16
RC5
SDO1
RP16
16 13
I/O
O
I/O
ST/DIG
DIG
ST/DIG
Digital I/O.
SPI data output.
Remappable Peripheral Pin 16 input/output.
RC6/CCP9/TX1/CK1/RP17
RC6
CCP9
TX1
CK1
RP17
17(2) 14(2)
I/O
I/O
O
I/O
I/O
ST/DIG
ST/DIG
DIG
ST/DIG
ST/DIG
Digital I/O.
Capture/Compare/PWM input/output.
EUSART1 asynchronous transmit.
EUSART1 synchronous clock (see related
RX1/DT1).
Remappable Peripheral Pin 17 input/output.
RC7/CCP10/RX1/DT1/RP18
RC7
CCP10
RX1
DT1
RP18
18(2) 15(2)
I/O
I/O
I
I/O
I/O
ST/DIG
ST/DIG
ST
ST/DIG
ST/DIG
Digital I/O.
Capture/Compare/PWM input/output.
Asynchronous serial receive data input.
Synchronous serial data output/input.
Remappable Peripheral Pin 18 input/output.
TABLE 1-3: PIC18F2XJ13 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number
Pin
Type Buffer
Type Description
28-SPDIP/
SSOP/
SOIC 28-QFN
Legend: TTL = TTL compatible input CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels Analog = Analog input
I = Input O = Output
P = Power OD = Open-Drain (no P diode to VDD)
DIG = Digital output I2C™ = Open-Drain, I2C specific
Note 1: RA7 and RA6 will be disabled if OSC1 and OSC2 are used for the clock function.
2: 5.5V tolerant.
2010 Microchip Technology Inc. Preliminary DS39974A-page 21
PIC18F47J13 FAMILY
VSS1 8 5 P — Ground reference for logic and I/O pins.
VSS21916——
VDD 20 17 P — Positive supply for peripheral digital logic and I/O
pins.
VDDCORE/VCAP
VDDCORE
VCAP
63—
P
P
—
—
—
Core logic power or external filter capacitor
connection.
Positive supply for microcontroller core logic
(regulator disabled).
External filter capacitor connection (regulator
enabled).
TABLE 1-3: PIC18F2XJ13 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number
Pin
Type Buffer
Type Description
28-SPDIP/
SSOP/
SOIC 28-QFN
Legend: TTL = TTL compatible input CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels Analog = Analog input
I = Input O = Output
P = Power OD = Open-Drain (no P diode to VDD)
DIG = Digital output I2C™ = Open-Drain, I2C specific
Note 1: RA7 and RA6 will be disabled if OSC1 and OSC2 are used for the clock function.
2: 5.5V tolerant.
PIC18F47J13 FAMILY
DS39974A-page 22 Preliminary 2010 Microchip Technology Inc.
TABLE 1-4: PIC18F4XJ13 PINOUT I/O DESCRIPTIONS
Pin Name
Pin Number Pin
Type Buffer
Type Description
44-
QFN 44-
TQFP
MCLR 18(3) 18 I ST Master Clear (Reset) input; this is an active-low
Reset to the device.
OSC1/CLKI/RA7
OSC1
CLKI
RA7(1)
32 30
I
I
I/O
ST
CMOS
TTL/DIG
Oscillator crystal or external clock input.
Oscillator crystal input or external clock source
input. ST buffer when configured in RC mode;
otherwise CMOS. Main oscillator input
connection.
External clock source input; always associated
with pin function, OSC1 (see related OSC1/CLKI
pins).
Digital I/O.
OSC2/CLKO/RA6
OSC2
CLKO
RA6(1)
33 31
O
O
I/O
—
—
TTL/DIG
Oscillator crystal or clock output.
Oscillator crystal output. Connects to crystal or
resonator in Crystal Oscillator mode.
Main oscillator feedback output connection
in RC mode, OSC2 pin outputs CLKO, which
has 1/4 the frequency of OSC1 and denotes the
instruction cycle rate.
Digital I/O.
Legend: TTL = TTL compatible input CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels Analog = Analog input
I = Input O = Output
P = Power OD = Open-Drain (no P diode to VDD)
DIG = Digital output I2C™ = Open-Drain, I2C specific
Note 1: RA7 and RA6 will be disabled if OSC1 and OSC2 are used for the clock function.
2: Available only on 44-pin devices (PIC18F46J13, PIC18F47J13, PIC18LF46J13 and PIC18LF47J13).
3: 5.5V tolerant.
2010 Microchip Technology Inc. Preliminary DS39974A-page 23
PIC18F47J13 FAMILY
PORTA is a bidirectional I/O port.
RA0/AN0/C1INA/ULPWU/PMA6/
RP0
RA0
AN0
C1INA
ULPWU
PMA6
RP0
19 19
I/O
I
I
I
I/O
I/O
TTL/DIG
Analog
Analog
Analog
ST/TTL/
DIG
ST/DIG
Digital I/O.
Analog Input 0.
Comparator 1 Input A.
Ultra low-power wake-up input.
Parallel Master Port digital I/O.
Remappable Peripheral Pin 0 input/output.
RA1/AN1/C2INA/VBG/CTDIN/
PMA7/RP1
RA1
AN1
C2INA
VBG
CTDIN
PMA7
RP1
20 20
I/O
O
I
O
I
I/O
I/O
TTL/DIG
Analog
Analog
Analog
ST
ST/TTL/
DIG
ST/DIG
Digital I/O.
Analog Input 1.
Comparator 2 Input A.
Band Gap Reference Voltage (VBG) output.
CTMU pulse delay input.
Parallel Master Port digital I/O.
Remappable Peripheral Pin 1 input/output.
RA2/AN2/C2INB/C1IND/C3INB/
VREF-/CVREF
RA2
AN2
C2INB
C1IND
C3INB
VREF-
CVREF
21 21
I/O
I
I
I
I
I
I
TTL/DIG
Analog
Analog
Analog
Analog
Analog
Analog
Digital I/O.
Analog Input 2.
Comparator 2 Input B.
Comparator 1 Input D.
Comparator 3 Input B.
A/D reference voltage (low) input.
Comparator reference voltage output.
RA3/AN3/C1INB/VREF+
RA3
AN3
C1INB
VREF+
22 22
I/O
I
I
I
TTL/DIG
Analog
Analog
Analog
Digital I/O.
Analog Input 3.
Comparator 1 Input B.
A/D reference voltage (high) input.
RA5/AN4/C1INC/SS1/HLVDIN/RP2
RA5
AN4
C1INC
SS1
HLVDIN
RP2
24 24
I/O
I
I
I
I
I/O
TTL/DIG
Analog
Analog
TTL
Analog
ST/DIG
Digital I/O.
Analog Input 4.
SPI slave select input.
Comparator 1 Input C.
High/Low-Voltage Detect input.
Remappable Peripheral Pin 2 input/output.
RA6(1)
RA7(1) See the OSC2/CLKO/RA6 pin.
See the OSC1/CLKI/RA7 pin.
TABLE 1-4: PIC18F4XJ13 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number Pin
Type Buffer
Type Description
44-
QFN 44-
TQFP
Legend: TTL = TTL compatible input CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels Analog = Analog input
I = Input O = Output
P = Power OD = Open-Drain (no P diode to VDD)
DIG = Digital output I2C™ = Open-Drain, I2C specific
Note 1: RA7 and RA6 will be disabled if OSC1 and OSC2 are used for the clock function.
2: Available only on 44-pin devices (PIC18F46J13, PIC18F47J13, PIC18LF46J13 and PIC18LF47J13).
3: 5.5V tolerant.
PIC18F47J13 FAMILY
DS39974A-page 24 Preliminary 2010 Microchip Technology Inc.
PORTB is a bidirectional I/O port. PORTB can be
software programmed for internal weak pull-ups on
all inputs.
RB0/AN12/C3IND/INT0/RP3
RB0
AN12
C3IND
INT0
RP3
98
I/O
I
I
I
I/O
TTL/DIG
Analog
Analog
ST
ST/DIG
Digital I/O.
Analog Input 12.
Comparator 3 Input D.
External Interrupt 0.
Remappable Peripheral Pin 3 input/output.
RB1/AN10/C3INC/PMBE/RTCC/
RP4
RB1
AN10
C3INC
PMBE(2)
RTCC
RP4
10 9
I/O
I
I
O
O
I/O
TTL/DIG
Analog
Analog
DIG
DIG
ST/DIG
Digital I/O.
Analog Input 10.
Comparator 3 Input C.
Parallel Master Port byte enable.
Asynchronous serial transmit data output.
Remappable Peripheral Pin 4 input/output.
RB2/AN8/C2INC/CTED1/PMA3/
REFO/RP5
RB2
AN8
C2INC
CTED1
PMA3(2)
REFO
RP5
11 10
I/O
I
I
I
O
O
I/O
TTL/DIG
Analog
Analog
ST
DIG
DIG
ST/DIG
Digital I/O.
Analog Input 8.
Comparator 2 Input C.
CTMU Edge 1 input.
Parallel Master Port address.
Reference output clock.
Remappable Peripheral Pin 5 input/output.
RB3/AN9/C3INA/CTED2/PMA2/
RP6
RB3
AN9
C3INA
CTED2
PMA2(2)
RP6
12 11
I/O
I
I
I
O
I/O
TTL/DIG
Analog
Analog
ST
DIG
ST/DIG
Digital I/O.
Analog Input 9.
Comparator 3 Input A.
CTMU Edge 2 input.
Parallel Master Port address.
Remappable Peripheral Pin 6 input/output.
TABLE 1-4: PIC18F4XJ13 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number Pin
Type Buffer
Type Description
44-
QFN 44-
TQFP
Legend: TTL = TTL compatible input CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels Analog = Analog input
I = Input O = Output
P = Power OD = Open-Drain (no P diode to VDD)
DIG = Digital output I2C™ = Open-Drain, I2C specific
Note 1: RA7 and RA6 will be disabled if OSC1 and OSC2 are used for the clock function.
2: Available only on 44-pin devices (PIC18F46J13, PIC18F47J13, PIC18LF46J13 and PIC18LF47J13).
3: 5.5V tolerant.
2010 Microchip Technology Inc. Preliminary DS39974A-page 25
PIC18F47J13 FAMILY
PORTB (continued)
RB4/CCP4/PMA1/KBI0/RP7
RB4
CCP4(2)
PMA1(2)
KBI0
RP7
14(3) 14(3)
I/O
I/O
I/O
I
I/O
TTL/DIG
ST/DIG
ST/TTL/
DIG
TTL
ST/DIG
Digital I/O.
Capture/Compare/PWM input/output.
Parallel Master Port address.
Interrupt-on-change pin.
Remappable Peripheral Pin 7 input/output.
RB5/CCP5/PMA0/KBI1/RP8
RB5
CCP5
PMA0(2)
KBI1
RP8
15(3) 15(3)
I/O
I/O
I/O
I
I/O
TTL/DIG
ST/DIG
ST/TTL/
DIG
TTL
ST/DIG
Digital I/O.
Capture/Compare/PWM input/output.
Parallel Master Port address.
Interrupt-on-change pin.
Remappable Peripheral Pin 8 input/output.
RB6/CCP6/KBI2/PGC/RP9
RB6
CCP6
KBI2
PGC
RP9
16(3) 16(3)
I/O
I/O
I
I
I/O
TTL/DIG
ST/DIG
TTL
ST
ST/DIG
Digital I/O.
Capture/Compare/PWM input/output.
Interrupt-on-change pin.
ICSP™ clock input.
Remappable Peripheral Pin 9 input/output.
RB7/CCP7/KBI3/PGD/RP10
RB7
CCP7
KBI3
PGD
RP10
17(3) 17(3)
I/O
I/O
I
I/O
I/O
TTL/DIG
ST/DIG
TTL
ST/DIG
ST/DIG
Digital I/O.
Capture/Compare/PWM input/output.
Interrupt-on-change pin.
In-Circuit Debugger and ICSP programming
data pin.
Remappable Peripheral Pin 10 input/output.
TABLE 1-4: PIC18F4XJ13 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number Pin
Type Buffer
Type Description
44-
QFN 44-
TQFP
Legend: TTL = TTL compatible input CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels Analog = Analog input
I = Input O = Output
P = Power OD = Open-Drain (no P diode to VDD)
DIG = Digital output I2C™ = Open-Drain, I2C specific
Note 1: RA7 and RA6 will be disabled if OSC1 and OSC2 are used for the clock function.
2: Available only on 44-pin devices (PIC18F46J13, PIC18F47J13, PIC18LF46J13 and PIC18LF47J13).
3: 5.5V tolerant.
PIC18F47J13 FAMILY
DS39974A-page 26 Preliminary 2010 Microchip Technology Inc.
PORTC is a bidirectional I/O port.
RC0/T1OSO/T1CKI/RP11
RC0
T1OSO
T1CKI
RP11
34 32
I/O
O
I
I/O
STDIG
Analog
ST
ST/DIG
Digital I/O.
Timer1 oscillator output.
Timer1/Timer3 external clock input.
Remappable Peripheral Pin 11 input/output.
RC1/CCP8/T1OSI/RP12
RC1
CCP8
T1OSI
RP12
35 35
I/O
I/O
I
I/O
ST/DIG
ST/DIG
Analog
ST/DIG
Digital I/O.
Capture/Compare/PWM input/output.
Timer1 oscillator input.
Remappable Peripheral Pin 12 input/output.
RC2/AN11/C2IND/CTPLS/RP13
RC2
AN11
C2IND
CTPLS
RP13
36 36
I/O
I
I
O
I/O
ST/DIG
Analog
Analog
DIG
ST/DIG
Digital I/O.
Analog Input 11.
Comparator 2 Input D.
CTMU pulse generator output.
Remappable Peripheral Pin 13 input/output.
RC3/SCK1/SCL1/RP14
RC3
SCK1
SCL1
RP14
37 37
I/O
I/O
I/O
I/O
ST/DIG
ST/DIG
I2C
ST/DIG
Digital I/O.
SPI clock input/output.
I2C clock input/output.
Remappable Peripheral Pin 14 input/output.
RC4/SDI1/SDA1/RP15
RC4
SDI1
SDA1
RP15
42 42
I/O
I
I/O
I/O
ST/DIG
ST
I2C™
ST/DIG
Digital I/O.
SPI data input.
I2C data input/output.
Remappable Peripheral Pin 15 input/output.
RC5/SDO1/RP16
RC5
SDO1
RP16
43 43
I/O
O
I/O
ST/DIG
DIG
ST/DIG
Digital I/O.
SPI data output.
Remappable Peripheral Pin 16 input/output.
TABLE 1-4: PIC18F4XJ13 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number Pin
Type Buffer
Type Description
44-
QFN 44-
TQFP
Legend: TTL = TTL compatible input CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels Analog = Analog input
I = Input O = Output
P = Power OD = Open-Drain (no P diode to VDD)
DIG = Digital output I2C™ = Open-Drain, I2C specific
Note 1: RA7 and RA6 will be disabled if OSC1 and OSC2 are used for the clock function.
2: Available only on 44-pin devices (PIC18F46J13, PIC18F47J13, PIC18LF46J13 and PIC18LF47J13).
3: 5.5V tolerant.
2010 Microchip Technology Inc. Preliminary DS39974A-page 27
PIC18F47J13 FAMILY
PORTC (continued)
RC6/CCP9/PMA5/TX1/CK1/RP17
RC6
CCP9
PMA5
TX1
CK1
RP17
44(3) 44(3)
I/O
I/O
I/O
O
I/O
I/O
ST/DIG
ST/DIG
DIG
ST/TTL/
DIG
ST/DIG
ST/DIG
Digital I/O.
Capture/Compare/PWM input/output.
Parallel Master Port address.
EUSART1 asynchronous transmit.
EUSART1 synchronous clock (see related
RX1/DT1).
Remappable Peripheral Pin 17 input/output.
RC7/CCP10/PMA4/RX1/DT1/RP18
RC7
CCP10
PMA4
RX1
DT1
RP18
1(3) 1(3)
I/O
I/O
I/O
I
I/O
I/O
ST/DIG
ST/DIG
ST/TTL/
DIG
ST
ST/DIG
ST/DIG
Digital I/O.
Capture/Compare/PWM input/output.
Parallel Master Port address.
EUSART1 asynchronous receive.
EUSART Synchronous data (see related
TX1/CK1).
Remappable Peripheral Pin 18 input/output.
TABLE 1-4: PIC18F4XJ13 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number Pin
Type Buffer
Type Description
44-
QFN 44-
TQFP
Legend: TTL = TTL compatible input CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels Analog = Analog input
I = Input O = Output
P = Power OD = Open-Drain (no P diode to VDD)
DIG = Digital output I2C™ = Open-Drain, I2C specific
Note 1: RA7 and RA6 will be disabled if OSC1 and OSC2 are used for the clock function.
2: Available only on 44-pin devices (PIC18F46J13, PIC18F47J13, PIC18LF46J13 and PIC18LF47J13).
3: 5.5V tolerant.
PIC18F47J13 FAMILY
DS39974A-page 28 Preliminary 2010 Microchip Technology Inc.
PORTD is a bidirectional I/O port.
RD0/PMD0/SCL2
RD0
PMD0
SCL2
38(3) 38(3)
I/O
I/O
I/O
ST/DIG
ST/TTL/
DIG
I2C
Digital I/O.
Parallel Master Port data.
I2C™ data input/output.
RD1/PMD1/SDA2
RD1
PMD1
SDA2
39(3) 39(3)
I/O
I/O
I/O
ST/DIG
ST/TTL/
DIG
I2C
Digital I/O.
Parallel Master Port data.
I2C data input/output.
RD2/PMD2/RP19
RD2
PMD2
RP19
40(3) 40(3)
I/O
I/O
I/O
ST/DIG
ST/TTL/
DIG
ST/DIG
Digital I/O.
Parallel Master Port data.
Remappable Peripheral Pin 19 input/output.
RD3/PMD3/RP20
RD3
PMD3
RP20
41(3) 41(3)
I/O
I/O
I/O
ST/DIG
ST/TTL/
DIG
ST/DIG
Digital I/O.
Parallel Master Port data.
Remappable Peripheral Pin 20 input/output.
RD4/PMD4/RP21
RD4
PMD4
RP21
2(3) 2(3)
I/O
I/O
I/O
ST/DIG
ST/TTL/
DIG
ST/DIG
Digital I/O.
Parallel Master Port data.
Remappable Peripheral Pin 21 input/output.
RD5/PMD5/RP22
RD5
PMD5
RP22
3(3) 3(3)
I/O
I/O
I/O
ST/DIG
ST/TTL/
DIG
ST/DIG
Digital I/O.
Parallel Master Port data.
Remappable Peripheral Pin 22 input/output.
RD6/PMD6/RP23
RD6
PMD6
RP23
4(3) 4(3)
I/O
I/O
I/O
ST/DIG
ST/TTL/
DIG
ST/DIG
Digital I/O.
Parallel Master Port data.
Remappable Peripheral Pin 23 input/output.
RD7/PMD7/RP24
RD7
PMD7
RP24
5(3) 5(3)
I/O
I/O
I/O
ST/DIG
ST/TTL/
DIG
ST/DIG
Digital I/O.
Parallel Master Port data.
Remappable Peripheral Pin 24 input/output.
TABLE 1-4: PIC18F4XJ13 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number Pin
Type Buffer
Type Description
44-
QFN 44-
TQFP
Legend: TTL = TTL compatible input CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels Analog = Analog input
I = Input O = Output
P = Power OD = Open-Drain (no P diode to VDD)
DIG = Digital output I2C™ = Open-Drain, I2C specific
Note 1: RA7 and RA6 will be disabled if OSC1 and OSC2 are used for the clock function.
2: Available only on 44-pin devices (PIC18F46J13, PIC18F47J13, PIC18LF46J13 and PIC18LF47J13).
3: 5.5V tolerant.
2010 Microchip Technology Inc. Preliminary DS39974A-page 29
PIC18F47J13 FAMILY
PORTE is a bidirectional I/O port.
RE0/AN5/PMRD
RE0
AN5
PMRD
25 25
I/O
I
I/O
ST/DIG
Analog
ST/TTL/
DIG
Digital I/O.
Analog Input 5.
Parallel Master Port input/output.
RE1/AN6/PMWR
RE1
AN6
PMWR
26 26
I/O
I
I/O
ST/DIG
Analog
ST/TTL/
DIG
Digital I/O.
Analog Input 6.
Parallel Master Port write strobe.
RE2/AN7/PMCS
RE2
AN7
PMCS
27 27
I/O
I
O
ST/DIG
Analog
DIG
Digital I/O.
Analog Input 7.
Parallel Master Port byte enable.
VSS1 6 6 P — Ground reference for logic and I/O pins.
VSS23129——
AVSS1 30 — P — Ground reference for analog modules.
VDD1 8 7 P — Positive supply for peripheral digital logic and
I/O pins.
VDD22928P—
VDDCORE/VCAP
VDDCORE
VCAP
23 23
P
P
—
—
Core logic power or external filter capacitor
connection.
Positive supply for microcontroller core logic
(regulator disabled).
External filter capacitor connection (regulator
enabled).
AVDD1 7 — P — Positive supply for analog modules.
AVDD2 28 — — — Positive supply for analog modules.
TABLE 1-4: PIC18F4XJ13 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number Pin
Type Buffer
Type Description
44-
QFN 44-
TQFP
Legend: TTL = TTL compatible input CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels Analog = Analog input
I = Input O = Output
P = Power OD = Open-Drain (no P diode to VDD)
DIG = Digital output I2C™ = Open-Drain, I2C specific
Note 1: RA7 and RA6 will be disabled if OSC1 and OSC2 are used for the clock function.
2: Available only on 44-pin devices (PIC18F46J13, PIC18F47J13, PIC18LF46J13 and PIC18LF47J13).
3: 5.5V tolerant.
PIC18F47J13 FAMILY
DS39974A-page 30 Preliminary 2010 Microchip Technology Inc.
NOTES:
2010 Microchip Technology Inc. Preliminary DS39974A-page 31
PIC18F47J13 FAMILY
2.0 GUIDELINES FOR GETTING
STARTED WITH PIC18FJ
MICROCONTROLLERS
2.1 Basic Connection Requirements
Getting started with the PIC18F47J13 family of 8-bit
microcontrollers requires attention to a minimal set of
device pin connections before proceeding with
development.
The following pins must always be connected:
•All V
DD and VSS pins
(see Section 2.2 “Power Supply Pins”)
•All AV
DD and AVSS pins, regardless of whether or
not the analog device features are used
(see Section 2.2 “Power Supply Pins”)
•MCLR
pin
(see Section 2.3 “Master Clear (MCLR) Pin”)
•V
CAP/VDDCORE pins (see Section 2.4 “Voltage
Regulator Pins (VCAP/VDDCORE)”)
These pins must also be connected if they are being
used in the end application:
• PGC/PGD pins used for In-Circuit Serial
Programming™ (ICSP™) and debugging purposes
(see Section 2.5 “ICSP Pins”)
• OSCI and OSCO pins when an external oscillator
source is used
(see Section 2.6 “External Oscillator Pins”)
Additionally, the following pins may be required:
•V
REF+/VREF- pins are used when external voltage
reference for analog modules is implemented
The minimum mandatory connections are shown in
Figure 2-1.
FIGURE 2-1: RECOMMENDED MINIMUM
CONNECTIONS
Note: On 44-pin QFN packages, the AVDD and
AVSS pins must always be connected,
regardless of whether any of the analog
modules are being used. On other pack-
age types, the AVDD and AVSS pins are
internally connected to the VDD/VSS pins.
PIC18FXXJXX
VDD
VSS
VDD
VSS
VSS
VDD
AVDD
AVSS
VDD
VSS
C1
R1
VDD
MCLR
VCAP/VDDCORE
R2
C7
C2(2)
C3(2)
C4(2)
C5(2)
C6(2)
Key (all values are recommendations):
C1 through C6: 0.1 F, 20V ceramic
C7: 10 F, 6.3V or greater, tantalum or ceramic
R1: 10 kΩ
R2: 100Ω to 470Ω
Note 1: See Section 2.4 “Voltage Regulator Pins
(VCAP/VDDCORE)” for explanation of
VCAP/VDDCORE connections.
2: The example shown is for a PIC18F device
with five VDD/VSS and AVDD/AVSS pairs.
Other devices may have more or less pairs;
adjust the number of decoupling capacitors
appropriately.
(1)
PIC18F47J13 FAMILY
DS39974A-page 32 Preliminary 2010 Microchip Technology Inc.
2.2 Power Supply Pins
2.2.1 DECOUPLING CAPACITORS
The use of decoupling capacitors on every pair of
power supply pins, such as VDD, VSS, AVDD and
AVSS, is required.
Consider the following criteria when using decoupling
capacitors:
•Value and type of capacitor: A 0.1 F (100 nF),
10-20V capacitor is recommended. The capacitor
should be a low-ESR device, with a resonance
frequency in the range of 200 MHz and higher.
Ceramic capacitors are recommended.
•Placement on the printed circuit board: The
decoupling capacitors should be placed as close
to the pins as possible. It is recommended to
place the capacitors on the same side of the
board as the device. If space is constricted, the
capacitor can be placed on another layer on the
PCB using a via; however, ensure that the trace
length from the pin to the capacitor is no greater
than 0.25 inch (6 mm).
•Handling high-frequency noise: If the board is
experiencing high-frequency noise (upward of
tens of MHz), add a second ceramic type capaci-
tor in parallel to the above described decoupling
capacitor. The value of the second capacitor can
be in the range of 0.01 F to 0.001 F. Place this
second capacitor next to each primary decoupling
capacitor. In high-speed circuit designs, consider
implementing a decade pair of capacitances as
close to the power and ground pins as possible
(e.g., 0.1 F in parallel with 0.001 F).
•Maximizing performance: On the board layout
from the power supply circuit, run the power and
return traces to the decoupling capacitors first,
and then to the device pins. This ensures that the
decoupling capacitors are first in the power chain.
Equally important is to keep the trace length
between the capacitor and the power pins to a
minimum, thereby reducing PCB trace
inductance.
2.2.2 TANK CAPACITORS
On boards with power traces running longer than
six inches in length, it is suggested to use a tank capac-
itor for integrated circuits, including microcontrollers, to
supply a local power source. The value of the tank
capacitor should be determined based on the trace
resistance that connects the power supply source to
the device, and the maximum current drawn by the
device in the application. In other words, select the tank
capacitor so that it meets the acceptable voltage sag at
the device. Typical values range from 4.7 F to 47 F.
2.3 Master Clear (MCLR) Pin
The MCLR pin provides two specific device
functions: Device Reset, and Device Programming
and Debugging. If programming and debugging are
not required in the end application, a direct
connection to VDD may be all that is required. The
addition of other components, to help increase the
application’s resistance to spurious Resets from
voltage sags, may be beneficial. A typical
configuration is shown in Figure 2-1. Other circuit
designs may be implemented, depending on the
application’s requirements.
During programming and debugging, the resistance
and capacitance that can be added to the pin must
be considered. Device programmers and debuggers
drive the MCLR pin. Consequently, specific voltage
levels (VIH and VIL) and fast signal transitions must
not be adversely affected. Therefore, specific values
of R1 and C1 will need to be adjusted based on the
application and PCB requirements. For example, it is
recommended that the capacitor, C1, be isolated
from the MCLR pin during programming and
debugging operations by using a jumper (Figure 2-2).
The jumper is replaced for normal run-time
operations.
Any components associated with the MCLR pin
should be placed within 0.25 inch (6 mm) of the pin.
FIGURE 2-2: EXAMPLE OF MCLR PIN
CONNECTIONS
Note 1: R1  10 k is recommended. A suggested
starting value is 10 k. Ensure that the
MCLR pin VIH and VIL specifications are met.
2: R2  470 will limit any current flowing into
MCLR from the external capacitor, C, in the
event of MCLR pin breakdown, due to
Electrostatic Discharge (ESD) or Electrical
Overstress (EOS). Ensure that the MCLR pin
VIH and VIL specifications are met.
C1
R2
R1
VDD
MCLR
PIC18FXXJXX
JP
2010 Microchip Technology Inc. Preliminary DS39974A-page 33
PIC18F47J13 FAMILY
2.4 Voltage Regulator Pins
(VCAP/VDDCORE)
On “F” devices, a low-ESR (< 5Ω) capacitor is required
on the VCAP/VDDCORE pin to stabilize the voltage
regulator output voltage. The VCAP/VDDCORE pin must
not be connected to VDD and must use a capacitor of 10
F connected to ground. The type can be ceramic or
tantalum. A suitable example is the Murata
GRM21BF50J106ZE01 (10 F, 6.3V) or equivalent.
Designers may use Figure 2-3 to evaluate ESR
equivalence of candidate devices.
It is recommended that the trace length not exceed
0.25 inch (6 mm). Refer to Section 30.0 “Electrical
Characteristics” for additional information.
On “LF” devices, the VCAP/VDDCORE pin must be tied to
a voltage supply at the VDDCORE level. Refer to
Section 30.0 “Electrical Characteristics” for
information on VDD and VDDCORE.
Note that the “LF” versions of these devices are
provided with the voltage regulator permanently
disabled; they must always be provided with a supply
voltage on the VDDCORE pin.
FIGURE 2-3: FREQUENCY vs. ESR
PERFORMANCE FOR
SUGGESTED VCAP
2.5 ICSP Pins
The PGC and PGD pins are used for In-Circuit Serial
Programming™ (ICSP™) and debugging purposes. It
is recommended to keep the trace length between the
ICSP connector and the ICSP pins on the device as
short as possible. If the ICSP connector is expected to
experience an ESD event, a series resistor is recom-
mended, with the value in the range of a few tens of
ohms, not to exceed 100Ω.
Pull-up resistors, series diodes, and capacitors on the
PGC and PGD pins are not recommended as they will
interfere with the programmer/debugger communica-
tions to the device. If such discrete components are an
application requirement, they should be removed from
the circuit during programming and debugging. Alter-
natively, refer to the AC/DC characteristics and timing
requirements information in the respective device
Flash programming specification for information on
capacitive loading limits, and pin input voltage high
(VIH) and input low (VIL) requirements.
For device emulation, ensure that the “Communication
Channel Select” (i.e., PGCx/PGDx pins) programmed
into the device matches the physical connections for
the ICSP to the Microchip debugger/emulator tool.
For more information on available Microchip
development tools connection requirements, refer to
Section 29.0 “Development Support”.
10
1
0.1
0.01
0.001 0.01 0.1 1 10 100 1000 10,000
Frequency (MHz)
ESR ()
Note: Data for Murata GRM21BF50J106ZE01 shown.
Measurements at 25°C, 0V DC bias.
PIC18F47J13 FAMILY
DS39974A-page 34 Preliminary 2010 Microchip Technology Inc.
2.6 External Oscillator Pins
Many microcontrollers have options for at least two
oscillators: a high-frequency primary oscillator and a
low-frequency secondary oscillator (refer to
Section 3.0 “Oscillator Configurations” for details).
The oscillator circuit should be placed on the same
side of the board as the device. Place the oscillator
circuit close to the respective oscillator pins with no
more than 0.5 inch (12 mm) between the circuit
components and the pins. The load capacitors should
be placed next to the oscillator itself, on the same side
of the board.
Use a grounded copper pour around the oscillator cir-
cuit to isolate it from surrounding circuits. The
grounded copper pour should be routed directly to the
MCU ground. Do not run any signal traces or power
traces inside the ground pour. Also, if using a two-sided
board, avoid any traces on the other side of the board
where the crystal is placed.
Layout suggestions are shown in Figure 2-4. In-line
packages may be handled with a single-sided layout
that completely encompasses the oscillator pins. With
fine-pitch packages, it is not always possible to com-
pletely surround the pins and components. A suitable
solution is to tie the broken guard sections to a mirrored
ground layer. In all cases, the guard trace(s) must be
returned to ground.
In planning the application’s routing and I/O assign-
ments, ensure that adjacent port pins and other signals
in close proximity to the oscillator are benign (i.e., free
of high frequencies, short rise and fall times, and other
similar noise).
For additional information and design guidance on
oscillator circuits, please refer to these Microchip
Application Notes, available at the corporate web site
(www.microchip.com):
•AN826, “Crystal Oscillator Ba sics and Crystal
Selection for rfPIC™ and PICmicro® Devices”
• AN849, “Basic PICmicro® Oscillator Design”
• AN943, “Practical PICmicro® Oscil lator Analysis
and Design”
•AN949, “Ma king Your Oscillator Work”
2.7 Unused I/Os
Unused I/O pins should be configured as outputs and
driven to a logic low state. Alternatively, connect a 1 kΩ
to 10 kΩ resistor to VSS on unused pins and drive the
output to logic low.
FIGURE 2-4: SU GGESTED PLACEMENT
OF THE OSCILLATOR
CIRCUIT
GND
`
`
`
OSC1
OSC2
T1OSO
T1OS I
Copper Pour Primary Oscillator
Crystal
Timer1 Oscillator
Crystal
DEVICE PINS
Primary
Oscillator
C1
C2
T1 Oscillator: C1 T1 Oscillator: C2
(tied to ground)
Single-Sided and In-Line Layouts:
Fine-Pitch (Dual-Sided) Layouts:
GND
OSCO
OSCI
Bottom Layer
Copper Pour
Oscillator
Crystal
Top Layer Copper Pour
C2
C1
DEVICE PINS
(tied to ground)
(tied to ground)
2010 Microchip Technology Inc. Preliminary DS39974A-page 35
PIC18F47J13 FAMILY
3.0 OSCILLATOR
CONFIGURATIONS
3.1 Overview
Devices in the PIC18F47J13 family incorporate a
different oscillator and microcontroller clock system
than general purpose PIC18F devices.
The PIC18F47J13 family has additional prescalers and
postscalers, which have been added to accommodate a
wide range of oscillator frequencies. The PIC18F47J13
provides two PLL circuits: a 4x multiplier PLL and a
96 MHz PLL enabling 48 MHz operation from the 8 MHz
internal oscillator. Figure 3-1 provides an overview of the
oscillator structure.
Other oscillator features used in PIC18 enhanced
microcontrollers, such as the internal oscillator block
and clock switching, remain the same. They are
discussed later in this chapter.
3.1.1 OSCILLATOR CONTROL
The operation of the oscillator in PIC18F47J13 family
devices is controlled through three Configuration regis-
ters and two control registers. Configuration registers,
CONFIG1L, CONFIG1H and CONFIG2L, select the
oscillator mode, PLL prescaler and CPU divider
options. As Configuration bits, these are set when the
device is programmed and left in that configuration until
the device is reprogrammed.
The OSCCON register (Register 3-2) selects the Active
Clock mode. It is primarily used in controlling clock
switching in power-managed modes. Its use is
discussed in Section 3.3.1 “Oscillator Control
Register”.
The OSCTUNE register (Register 3-1) is used to trim the
INTOSC frequency source and select the low-frequency
clock source that drives several special features. The
OSCTUNE register is also used to activate or disable the
Phase Locked Loop (PLL). Its use is described in
Section 3.2.5.1 “OSCTUNE Register”.
3.2 Oscillator Types
PIC18F47J13 family devices can be operated in eight
distinct oscillator modes. Users can program the
FOSC<2:0> Configuration bits to select one of the
modes listed in Table 3-1. For oscillator modes which
produce a clock output (CLKO) on pin, RA6, the output
frequency will be one fourth of the peripheral clock
frequency. The clock output stops when in Sleep mode,
but will continue during Idle mode (see Figure 3-1).
3.2.1 OSCILLATOR MODES
A network of MUXes, clock dividers and two PLL
circuits have been provided, which can be used to
derive various microcontroller frequencies. Figure 3-1
helps in understanding the oscillator structure of the
PIC18F47J13 family of devices.
TABLE 3-1: OSCILLATOR MODES
Mode Descript ion
ECPLL External Clock Input mode, the PLL can
be enabled or disabled in software,
CLKO on RA6, apply external clock
signal to RA7.
EC External Clock Input mode, the PLL is
always disabled, CLKO on RA6, apply
external clock signal to RA7.
HSPLL High-Speed Crystal/Resonator mode,
PLL can be enabled or disabled in
software, crystal/resonator connected
between RA6 and RA7.
HS High-Speed Crystal/Resonator mode,
PLL always disabled, crystal/resonator
connected between RA6 and RA7.
INTOSCPLLO Internal Oscillator mode, PLL can be
enabled or disabled in software, CLKO
on RA6, port function on RA7, the
internal oscillator block is used to derive
both the primary clock source and the
postscaled internal clock.
INTOSCPLL Internal Oscillator mode, PLL can be
enabled or disabled in software, port
function on RA6 and RA7, the internal
oscillator block is used to derive both the
primary clock source and the postscaled
internal clock.
INTOSCO Internal Oscillator mode, PLL is always
disabled, CLKO on RA6, port function on
RA7, the output of the INTOSC
postscaler serves as both the postscaled
internal clock and the primary clock
source.
INTOSC Internal Oscillator mode, PLL is always
disabled, port function on RA6 and RA7,
the output of the INTOSC postscaler
serves as both the postscaled internal
clock and the primary clock source.
PIC18F47J13 FAMILY
DS39974A-page 36 Preliminary 2010 Microchip Technology Inc.
FIGURE 3- 1 : PIC18F 47 J13 FAM IL Y CLOCK D IA GRA M
OSC1
OSC2
Primary Oscillator
CPU
Peripherals
IDLE
INTOSC Postscaler
8 MHz
4 MHz
2 MHz
1 MHz
500 kHz
125 kHz
250 kHz
111
110
101
100
011
010
001
000
31 kHz
INTRC
31 kHz
Internal
Oscillator
Block
8 MHz
8 MHz
0
1
OSCTUNE<7>
PLLDIV<2:0>
4 MHz
WDT, PWRT, FSCM
and Two-Speed Start-up
OSCCON<6:4>
PLLEN
1
0
FOSC<2>
1
0
PLL Prescaler
96 MHz
PLL(1) 2
00
FOSC<2:1>
Other
00
01
OSCCON<1:0>
11
4
RA6
CLKO
Enabled Modes
Timer1 Clock(3)
Postscaled
Internal Clock
T1OSI
T1OSO
Secondary Oscil lator
Note 1: The 96 MHz PLL requires a 4 MHz input and it produces a 96 MHz output. The 96 MHz PLL prescaler enables
source clocks of 4, 8, 12, 16, 20, 24, 40 or 48 MHz to provide the 4 MHz input.
2: The 4x PLL requires an input clock source between 4 and 12 MHz. When using INTOSC to provide the 4x PLL
input, the INTOSC postscaler must be set to either 8 MHz or 4 MHz. Selecting other INTOSC postscaler settings
will operate the PLL outside of the specification.
3: Selecting the Timer1 clock or postscaled internal clock will turn off the primary oscillator (unless required by the
reference clock of Section 3.4 “Reference Clock Output”) and PLL.
12
10
6
5
4
3
2
1
000
001
010
011
100
101
110
111
48 MHz
Primary Clock
Source
CFGPLLEN
1
0
0
1
4x PLL(2)
PLLSEL
FOSC<2>
2010 Microchip Technology Inc. Preliminary DS39974A-page 37
PIC18F47J13 FAMILY
3.2.2 CRYSTAL OSCILLATOR/CERAMIC
RESONATORS
In HS and HSPLL Oscillator modes, a crystal or
ceramic resonator is connected to the OSC1 and
OSC2 pins to establish oscillation. Figure 3-2 displays
the pin connections.
The oscillator design requires the use of a parallel
resonant crystal.
FIGU RE 3-2: CRYSTAL/CERAMI C
RES ONAT OR OP ERA TIO N
(HS OR HSPLL
CONFIGURATION)
TABLE 3-2: CAPACITOR SELECTION FOR
CERAMIC RESO NATORS
T ABLE 3-3: CAPACITOR SELECTION FOR
CRYSTAL OSCILLATOR
An internal postscaler allows users to select a clock
frequency other than that of the crystal or resonator.
Frequency division is determined by the CPDIV
Configuration bits. Users may select a clock frequency
of the oscillator frequency, or 1/2, 1/3 or 1/6 of the
frequency.
Note: Use of a series resonant crystal may give
a frequency out of the crystal
manufacturer’s specifications.
Typical Capacitor Values Used:
Mode Freq OSC1 OSC2
HS 8.0 MHz
16.0 MHz
27 pF
22 pF
27 pF
22 pF
Capacitor values are for design guidance only.
These capacitors were tested with the resonators
listed below for basic start-up and operation. These
values are not optimiz ed.
Different capacitor values may be required to produce
acceptable oscillator operation. The user should test
the performance of the oscillator over the expected
VDD and temperature range for the application.
See the notes following Table 3-3 for additional
information.
Resonators Used:
4.0 MHz
8.0 MHz
16.0 MHz
Note 1: See Table 3-2 and Table 3-3 for initial values
of C1 and C2.
2: RS may be required to avoid overdriving
crystals with low drive level specifications.
C1
(1)
C2
(1)
XTAL
OSC2
OSC1
Sleep
To
Logic
R
S
(2)
Internal
PIC18F47J13
Osc Type Crystal
Freq
Typica l Cap acitor V alues
Tested:
C1 C2
HS 4 MHz 27 pF 27 pF
8 MHz 22 pF 22 pF
16 MHz 18 pF 18 pF
Capacitor values are for design guidance only.
These capacitors were tested with the crystals listed
below for basic start-up and operation. These values
are not optimized.
Different capacitor values may be required to produce
acceptable oscillator operation. The user should test
the performance of the oscillator over the expected
VDD and temperature range for the application.
See the notes following this table for additional
information.
Crystals Used:
4 MHz
8 MHz
16 MHz
Note 1: Higher capacitance not only increases
the stability of oscillator, but also
increases the start-up time.
2: Since each resonator/crystal has its own
characteristics, the user should consult
the resonator/crystal manufacturer for
appropriate values of external
components.
3: Rs may be required to avoid overdriving
crystals with low drive level specification.
4: Always verify oscillator performance over
the VDD and temperature range that is
expected for the application.
PIC18F47J13 FAMILY
DS39974A-page 38 Preliminary 2010 Microchip Technology Inc.
3.2.3 EXTERNAL CLOCK INPUT
The EC and ECPLL Oscillator modes require an
external clock source to be connected to the OSC1 pin.
There is no oscillator start-up time required after a
Power-on Reset (POR) or after an exit from Sleep mode.
In the EC Oscillator mode, the oscillator frequency,
divided by 4, is available on the OSC2 pin. In the
ECPLL Oscillator mode, the PLL output, divided by 4,
is available on the OSC2 pin. This signal may be used
for test purposes or to synchronize other logic.
Figure 3-3 displays the pin connections for the EC
Oscillator mode.
FIGURE 3-3: EXTERNAL CLOCK INPUT
OPER ATI ON (E C AND
ECPL L CON FIGUR ATION)
3.2.4 PLL FREQUENCY MULTIPLIER
A Phase Locked Loop (PLL) circuit provides an option for
users who want to use a low-frequency oscillator circuit
or clock the device up to its highest rated frequency from
a crystal oscillator. This may be useful for customers who
are concerned with EMI due to high-frequency crystals or
users who require higher clock speeds from the internal
oscillator. PIC18F47J13 family devices include two PLL
circuits: a 4x PLL and a 96 MHz PLL.
Either PLL can be enabled in HSPLL, ECPLL,
INTOSCPLL and INTOSCPLLO Oscillator modes by
setting the PLLEN bit (OSCTUNE<6>) or by clearing
the CFGPLLEN bit (CONFIG1L<4>).
The 96 MHz PLL is designed to produce a fixed
96 MHz reference clock from a fixed 4 MHz input. The
output can then be divided and used for producing a
48 MHz microcontroller core clock. Because the PLL
has a fixed frequency input and output, there are eight
prescaling options to match the oscillator input fre-
quency to the PLL. This prescaler allows the PLL to be
used with crystals, resonators and external clocks,
which are integer multiple frequencies of 4 MHz. For
example, a 12 MHz crystal could be used in a prescaler
Divide-by-Three mode to drive the 96 MHz PLL.
The 4x PLL is designed to produce variable reference
clocks of 16 to 48 MHz from any input clock between
4 and 12 MHz. The PLLSEL (CONFIG3H<2>) Config-
uration bit is used to select which PLL circuit will be
used by the application.
3.2.5 INTERNAL OSCILLATOR BLOCK
The PIC18F47J13 family devices include an internal
oscillator block which generates two different clock
signals; either can be used as the microcontroller’s
clock source. The internal oscillator may eliminate the
need for external oscillator circuits on the OSC1 and/or
OSC2 pins.
The main output (INTOSC) is an 8 MHz clock source
which can be used to directly drive the device clock. It
also drives the INTOSC postscaler which can provide a
range of clock frequencies from 31 kHz to 8 MHz.
Additionally, the INTOSC may be used in conjunction
with a PLL to generate clock frequencies up to 48 MHz.
The other clock source is the internal RC oscillator
(INTRC) which provides a nominal 31 kHz output.
INTRC is enabled if it is selected as the device clock
source. It is also enabled automatically when any of the
following are enabled:
• Power-up Timer
• Fail-Safe Clock Monitor
• Watchdog Timer
• Two-Speed Start-up
These features are discussed in larger detail in
Section 27.0 “Special Features of the CPU”.
The clock source frequency (INTOSC direct, INTRC
direct or INTOSC postscaler) is selected by configuring
the IRCF bits of the OSCCON register (page 42).
OSC1/CLKI
OSC2/CLKO
FOSC/4
Clock from
Ext. System PIC18F47J13
2010 Microchip Technology Inc. Preliminary DS39974A-page 39
PIC18F47J13 FAMILY
3.2.5.1 OSCTUNE Register
The internal oscillator’s output has been calibrated at
the factory but can be adjusted in the user’s applica-
tion. This is done by writing to the OSCTUNE register
(Register 3-1).
When the OSCTUNE register is modified, the INTOSC
frequency will begin shifting to the new frequency. The
INTOSC clock will typically stabilize within 1 s. Code
execution continues during this shift. There is no
indication that the shift has occurred.
The OSCTUNE register also contains the INTSRC bit.
The INTSRC bit allows users to select which internal
oscillator provides the clock source when the 31 kHz
frequency option is selected. This is covered in larger
detail in Section 3.3.1 “Oscillator Control Register”.
The PLLEN bit, contained in the OSCTUNE register,
can be used to enable or disable the internal PLL
when running in one of the PLL type oscillator modes
(e.g., INTOSCPLL). Oscillator modes that do not con-
tain “PLL” in their name cannot be used with the PLL.
In these modes, the PLL is always disabled regardless
of the setting of the PLLEN bit.
When configured for one of the PLL enabled modes, set-
ting the PLLEN bit does not immediately switch the
device clock to the PLL output. The PLL requires up to
electrical parameter, trc, to start-up and lock, during
which time, the device continues to be clocked. Once the
PLL output is ready, the microcontroller core will
automatically switch to the PLL derived frequency.
3.2.5.2 Internal Oscillator Output Frequency
and Drift
The internal oscillator block is calibrated at the factory
to produce an INTOSC output frequency of 8.0 MHz.
However, this frequency may drift as VDD or tempera-
ture changes, which can affect the controller operation
in a variety of ways.
The low-frequency INTRC oscillator operates indepen-
dently of the INTOSC source. Any changes in INTOSC
across voltage and temperature are not necessarily
reflected by changes in INTRC and vice versa.
3.2.5.3 Compensating for INTOSC Drift
It is possible to adjust the INTOSC frequency by
modifying the value in the OSCTUNE register. This has
no effect on the INTRC clock source frequency.
Tuning the INTOSC source requires knowing when to
make the adjustment, in which direction it should be
made, and in some cases, how large a change is
needed. When using the EUSART, for example, an
adjustment may be required when it begins to generate
framing errors or receives data with errors while in
Asynchronous mode. Framing errors indicate that the
device clock frequency is too high; to adjust for this,
decrement the value in OSCTUNE to reduce the clock
frequency. On the other hand, errors in data may sug-
gest that the clock speed is too low; to compensate,
increment OSCTUNE to increase the clock frequency.
It is also possible to verify device clock speed against
a reference clock. Two timers may be used: one timer
is clocked by the peripheral clock, while the other is
clocked by a fixed reference source, such as the
Timer1 oscillator. Both timers are cleared, but the timer
clocked by the reference generates interrupts. When
an interrupt occurs, the internally clocked timer is read
and both timers are cleared. If the internally clocked
timer value is greater than expected, then the internal
oscillator block is running too fast. To adjust for this,
decrement the OSCTUNE register.
Finally, an ECCP module can use free-running Timer1
(or Timer3), clocked by the internal oscillator block and
an external event with a known period (i.e., AC power
frequency). The time of the first event is captured in the
CCPRxH:CCPRxL registers and is recorded for use
later. When the second event causes a capture, the
time of the first event is subtracted from the time of the
second event. Since the period of the external event is
known, the time difference between events can be
calculated.
If the measured time is greater than the calculated time,
the internal oscillator block is running too fast; to
compensate, decrement the OSCTUNE register. If the
measured time is less than the calculated time, the inter-
nal oscillator block is running too slow; to compensate,
increment the OSCTUNE register.
PIC18F47J13 FAMILY
DS39974A-page 40 Preliminary 2010 Microchip Technology Inc.
REGISTER 3-1: OSCTUNE: OSCILLATOR TUNING REGISTER (ACCES S F9Bh)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
INTSRC PLLEN(1) TUN5 TUN4 TUN3 TUN2 TUN1 TUN0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 INTSRC: Internal Oscillator Low-Frequency Source Select bit
1 = 31.25 kHz device clock derived from 8 MHz INTOSC source (divide-by-256 enabled)
0 = 31 kHz device clock derived directly from INTRC internal oscillator
bit 6 PLLEN: Frequency Multiplier Enable bit(1)
1 = PLL is enabled
0 = PLL is disabled
bit 5-0 TUN<5:0>: Frequency Tuning bits
011111 = Maximum frequency
011110
•
•
•
000001
000000 = Center frequency; oscillator module is running at the calibrated frequency
111111
•
•
•
100000 = Minimum frequency
Note 1: When the CFGPLLEN Configuration bit is used to enable the PLL, clearing OSCTUNE<6> will not disable
the PLL.
2010 Microchip Technology Inc. Preliminary DS39974A-page 41
PIC18F47J13 FAMILY
3.3 Clock Sources and Oscillator
Switching
Like previous PIC18 enhanced devices, the
PIC18F47J13 family includes a feature that allows the
device clock source to be switched from the main
oscillator to an alternate, low-frequency clock source.
PIC18F47J13 family devices offer two alternate clock
sources. When an alternate clock source is enabled,
the various power-managed operating modes are
available.
Essentially, there are three clock sources for these
devices:
• Primary Oscillators
• Secondary Oscillators
• Internal Oscillator Block
The Primary Oscillators include the External Crystal
and Resonator modes, the External Clock modes and
the internal oscillator block. The particular mode is
defined by the FOSC<2:0> Configuration bits. The
details of these modes are covered earlier in this
chapter.
The Secondary Oscillators are external sources that
are not connected to the OSC1 or OSC2 pins. These
sources may continue to operate even after the
controller is placed in a power-managed mode.
PIC18F47J13 family devices offer the Timer1 oscillator
as a secondary oscillator. This oscillator, in all
power-managed modes, is often the time base for
functions such as a Real-Time Clock (RTC). Most often,
a 32.768 kHz watch crystal is connected between the
RC0/T1OSO/T1CKI/RP11 and RC1/CCP8/T1OSI/RP12
pins. Like the HS Oscillator mode circuits, loading
capacitors are also connected from each pin to ground.
The Timer1 oscillator is discussed in larger detail in
Section 13.5 “Timer1 Oscillator”.
In addition to being a primary clock source, the
postscaled internal clock is available as a
power-managed mode clock source. The INTRC
source is also used as the clock source for several
special features, such as the WDT and Fail-Safe Clock
Monitor (FSCM).
3.3.1 OSCILLATOR CONTROL REGISTER
The OSCCON register (Register 3-2) controls several
aspects of the device clock’s operation, both in
full-power operation and in power-managed modes.
The System Clock Select bits, SCS<1:0>, select the
clock source. The available clock sources are the
primary clock (defined by the FOSC<2:0> Configura-
tion bits), the secondary clock (Timer1 oscillator) and
the postscaled internal clock.The clock source changes
immediately, after one or more of the bits is written to,
following a brief clock transition interval. The SCS bits
are cleared on all forms of Reset.
The Internal Oscillator Frequency Select bits,
IRCF<2:0>, select the frequency output provided on the
postscaled internal clock line. The choices are the
INTRC source, the INTOSC source (8 MHz) or one of
the frequencies derived from the INTOSC postscaler
(31 kHz to 4 MHz). If the postscaled internal clock is
supplying the device clock, changing the states of these
bits will have an immediate change on the internal oscil-
lator’s output. On device Resets, the default output
frequency of the INTOSC postscaler is set at 4 MHz.
When an output frequency of 31 kHz is selected
(IRCF<2:0> = 000), users may choose the internal
oscillator, which acts as the source. This is done with
the INTSRC bit in the OSCTUNE register
(OSCTUNE<7>). Setting this bit selects INTOSC as a
31.25 kHz clock source by enabling the divide-by-256
output of the INTOSC postscaler. Clearing INTSRC
selects INTRC (nominally 31 kHz) as the clock source.
This option allows users to select the tunable and more
precise INTOSC as a clock source, while maintaining
power savings with a very low clock speed. Regardless
of the setting of INTSRC, INTRC always remains the
clock source for features such as the WDT and the
FSCM.
The OSTS and SOSCRUN bits indicate which clock
source is currently providing the device clock. The OSTS
bit indicates that the Oscillator Start-up Timer (OST) has
timed out and the primary clock is providing the device
clock in primary clock modes. The SOSCRUN bit
(OSCCON2<6>) indicates when the Timer1 oscillator is
providing the device clock in secondary clock modes. In
power-managed modes, only one of these bits will be set
at any time. If none of these bits are set, the INTRC is
providing the clock or the internal oscillator block has just
started and is not yet stable.
The IDLEN bit determines if the device goes into Sleep
mode, or one of the Idle modes, when the SLEEP
instruction is executed.
PIC18F47J13 FAMILY
DS39974A-page 42 Preliminary 2010 Microchip Technology Inc.
The use of the flag and control bits in the OSCCON
register is discussed in more detail in Section 4.0
“Low-Power Modes”.
3.3.2 OSCILLATOR TRANSITIONS
PIC18F47J13 family devices contain circuitry to
prevent clock “glitches” when switching between clock
sources. A short pause in the device clock occurs dur-
ing the clock switch. The length of this pause is the sum
of two cycles of the old clock source and three to four
cycles of the new clock source. This formula assumes
that the new clock source is stable.
Clock transitions are discussed in more detail in
Section 4.1.2 “Entering Power-Managed Modes”.
Note 1: The Timer1 crystal driver is enabled by
setting the T1OSCEN bit in the Timer1
Control register (T1CON<3>). If the
Timer1 oscillator is not enabled, then any
attempt to select the Timer1 clock source
will be ignored, unless the CONFIG2L
register’s SOSCSEL<1:0> bits are set to
Digital mode.
2: If Timer1 is driving a crystal, it is recom-
mended that the Timer1 oscillator be
operating and stable prior to switching to
it as the clock source; otherwise, a very
long delay may occur while the Timer1
oscillator starts.
REGISTER 3-2: OSCCON: OSCILLATOR CONTROL REGISTER (ACCESS FD3h)
R/W-0 R/W-1 R/W-1 R/W-0 R-1(1) U-1 R/W-0 R/W-0
IDLEN IRCF2 IRCF1 IRCF0 OSTS —SCS1SCS0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 IDLEN: Idle Enable bit
1 = Device enters Idle mode on SLEEP instruction
0 = Device enters Sleep mode on SLEEP instruction
bit 6-4 IRCF<2:0>: Internal Oscillator Frequency Select bits
When using INTOSC to drive the 4x PLL, select 8 MHz or 4 MHz only to avoid operating the 4x PLL
outside of specification.
111 = 8 MHz (INTOSC drives clock directly)
110 = 4MHz
(2)
101 = 2MHz
100 = 1MHz
011 = 500 kHz
010 = 250 kHz
001 = 125 kHz
000 = 31 kHz (from either INTOSC/256 or INTRC directly)(3)
bit 3 OSTS: Oscillator Start-up Time-out Status bit(1)
1 = Oscillator Start-up Timer time-out has expired; primary oscillator is running
0 = Oscillator Start-up Timer time-out is running; primary oscillator is not ready
bit 2 Unimplemented: Read as ‘1’
bit 1-0 SCS<1:0>: System Clock Select bits
11 = Postscaled internal clock (INTRC/INTOSC derived)
10 = Reserved
01 = Timer1 oscillator
00 = Primary clock source (INTOSC postscaler output when FOSC<2:0> = 001 or 000)
00 = Primary clock source (CPU divider output for other values of FOSC<2:0>)
Note 1: Reset value is ‘0’ when Two-Speed Start-up is enabled and ‘1’ if disabled.
2: Default output frequency of INTOSC on Reset (4 MHz).
3: Source selected by the INTSRC bit (OSCTUNE<7>).
2010 Microchip Technology Inc. Preliminary DS39974A-page 43
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REGISTER 3-3: OSCCON2: OSCILLATOR CONTROL REGISTER 2 (ACCESS F87h)
U-0 R-0(2) U-0 R/W-1 R/W-0(2) R/W-1 U-0 U-0
—SOSCRUN —SOSCDRV SOSCGO(3) —— —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 Unimplemented: Read as ‘0’
bit 6 SOSCRUN: SOSC Run Status bit
1 = System clock comes from secondary SOSC
0 = System clock comes from an oscillator other than SOSC
bit 5 Unimplemented: Read as ‘0’
bit 4 SOSCDRV: SOSC Drive Control bit
1 = T1OSC/SOSC oscillator drive circuit is selected by Configuration bits, CONFIG2L<4:3>
0 = Low-power T1OSC/SOSC circuit is selected
bit 3 SOSCGO: Oscillator Start Control bit(3)
1 = Turns on the oscillator, even if no peripherals are requesting it
0 = Oscillator is shut off unless peripherals are requesting it
bit 2 Reserved: Maintain as ‘1’
bit 1-0 Unimplemented: Read as ‘0’
Note 1: Reset value is ‘0’ when Two-Speed Start-up is enabled and ‘1’ if disabled.
2: Default output frequency of INTOSC on Reset (4 MHz).
3: When the SOSC is selected to run from a digital clock input, rather than an external crystal, this bit has no
effect.
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DS39974A-page 44 Preliminary 2010 Microchip Technology Inc.
3.4 Reference Clock Output
In addition to the peripheral clock/4 output in certain
oscillator modes, the device clock in the PIC18F47J13
family can also be configured to provide a reference
clock output signal to a port pin. This feature is avail-
able in all oscillator configurations and allows the user
to select a greater range of clock submultiples to drive
external devices in the application.
This reference clock output is controlled by the
REFOCON register (Register 3-4). Setting the ROON
bit (REFOCON<7>) makes the clock signal available
on the REFO (RB2) pin. The RODIV<3:0> bits enable
the selection of 16 different clock divider options.
The ROSSLP and ROSEL bits (REFOCON<5:4>)
control the availability of the reference output during
Sleep mode. The ROSEL bit determines if the oscillator
is on OSC1 and OSC2, or the current system clock
source is used for the reference clock output. The
ROSSLP bit determines if the reference source is
available on RB2 when the device is in Sleep mode.
To use the reference clock output in Sleep mode, both
the ROSSLP and ROSEL bits must be set. The device
clock must also be configured for an EC or HS mode;
otherwise, the oscillator on OSC1 and OSC2 will be
powered down when the device enters Sleep mode.
Clearing the ROSEL bit allows the reference output
frequency to change as the system clock changes
during any clock switches.
REGISTER 3-4: REFOCON: REFERENCE OSCILLATOR CONTROL REGISTER (BANKED F3Dh)
R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
ROON — ROSSLP ROSEL RODIV3 RODIV2 RODIV1 RODIV0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 ROON: Reference Oscillator Output Enable bit
1 = Reference oscillator is enabled on REFO pin
0 = Reference oscillator is disabled
bit 6 Unimplemented: Read as ‘0’
bit 5 ROSSLP: Reference Oscillator Output Stop in Sleep bit
1 = Reference oscillator continues to run in Sleep
0 = Reference oscillator is disabled in Sleep
bit 4 ROSEL: Reference Oscillator Source Select bit
1 = Primary oscillator crystal/resonator is used as the base clock(1)
0 = System clock (FOSC) is used as the base clock; the base clock reflects any clock switching of the device
bit 3-0 RODIV<3:0>: Reference Oscillator Divisor Select bits
1111 = Base clock value divided by 32,768
1110 = Base clock value divided by 16,384
1101 = Base clock value divided by 8,192
1100 = Base clock value divided by 4,096
1011 = Base clock value divided by 2,048
1010 = Base clock value divided by 1,024
1001 = Base clock value divided by 512
1000 = Base clock value divided by 256
0111 = Base clock value divided by 128
0110 = Base clock value divided by 64
0101 = Base clock value divided by 32
0100 = Base clock value divided by 16
0011 = Base clock value divided by 8
0010 = Base clock value divided by 4
0001 = Base clock value divided by 2
0000 = Base clock value
Note 1: The crystal oscillator must be enabled using the FOSC<2:0> bits; the crystal maintains the operation in
Sleep mode.
2010 Microchip Technology Inc. Preliminary DS39974A-page 45
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3.5 Effects of Power-Managed Modes
on Various Clock Sources
When the PRI_IDLE mode is selected, the designated
primary oscillator continues to run without interruption.
For all other power-managed modes, the oscillator
using the OSC1 pin is disabled.
In secondary clock modes (SEC_RUN and
SEC_IDLE), the Timer1 oscillator is operating and
providing the device clock. The Timer1 oscillator may
also run in all power-managed modes if required to
clock Timer1, Timer3 or Timer5.
In internal oscillator modes (RC_RUN and RC_IDLE),
the internal oscillator block provides the device clock
source. The 31 kHz INTRC output can be used directly
to provide the clock and may be enabled to support
various special features regardless of the
power-managed mode (see Sect io n 27. 2 “Watch dog
Timer (WDT)”, Section 27.4 “Two-Speed Start-up”
and Section 27.5 “Fail-Safe Clock M onitor ” for more
information on WDT, FSCM and Two-Speed Start-up).
The INTOSC output at 8 MHz may be used directly to
clock the device or may be divided down by the post-
scaler. The INTOSC output is disabled if the clock is
provided directly from the INTRC output.
If Sleep mode is selected, all clock sources which are
no longer required are stopped. Since all the transistor
switching currents have been stopped, Sleep mode
achieves the lowest current consumption of the device
(only leakage currents) outside of Deep Sleep.
Enabling any on-chip feature that will operate during
Sleep mode increases the current consumed during
Sleep mode. The INTRC is required to support WDT
operation. The Timer1 oscillator may be operating to
support an RTC. Other features may be operating that
do not require a device clock source (i.e., MSSP slave,
PMP, INTx pins, etc.). Peripherals that may add
significant current consumption are listed in
Section 30.2 “DC Characteristics: Power-Down and
Supply Current PIC18F47J13 Family (Industrial)”.
3.6 Power-up Delays
Power-up delays are controlled by two timers so that no
external Reset circuitry is required for most applica-
tions. The delays ensure that the device is kept in
Reset until the device power supply is stable under
normal circumstances and the primary clock is operat-
ing and stable. For additional information on power-up
delays, see Section 5.6 “Power-up Timer (PWRT)”.
The first timer is the Power-up Timer (PWRT), which
provides a fixed delay on power-up (parameter 33,
Table 30-14).
The second timer is the Oscillator Start-up Timer
(OST), intended to keep the chip in Reset until the
crystal oscillator is stable (HS mode). The OST does
this by counting 1024 oscillator cycles before allowing
the oscillator to clock the device.
There is a delay of interval, T
CSD (parameter 38,
Table 30-14), following POR, while the controller
becomes ready to execute instructions. This delay runs
concurrently with any other delays. This may be the only
delay that occurs when any of the internal oscillator or
EC modes are used as the primary clock source.
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DS39974A-page 46 Preliminary 2010 Microchip Technology Inc.
NOTES:
2010 Microchip Technology Inc. Preliminary DS39974A-page 47
PIC18F47J13 FAMILY
4.0 LOW-POWER MODES
The PIC18F47J13 family devices can manage power
consumption through clocking to the CPU and the
peripherals. In general, reducing the clock frequency
and number of circuits being clocked reduces power
consumption.
For managing power in an application, the primary
modes of operation are:
• Run Mode
• Idle Mode
• Sleep Mode
• Deep Sleep Mode
Additionally, there is an Ultra Low-Power Wake-up
(ULPWU) mode for generating an interrupt-on-change
on RA0.
These modes define which portions of the device are
clocked and at what speed.
• The Run and Idle modes can use any of the three
available clock sources (primary, secondary or
internal oscillator blocks).
• The Sleep mode does not use a clock source.
The ULPWU mode on RA0 allows a slow falling voltage
to generate an interrupt-on-change on RA0 without
excess current consumption. See Section 4.7 “Ultra
Low-Power Wake-up”.
The power-managed modes include several
power-saving features offered on previous PIC®
devices, such as clock switching, ULPWU and Sleep
mode. In addition, the PIC18F47J13 family devices
have added a new power-managed Deep Sleep mode.
4.1 Selecting Power-Managed Modes
Selecting a power-managed mode requires these
decisions:
• Will the CPU be clocked?
• If so, which clock source will be used?
The IDLEN bit (OSCCON<7>) controls CPU clocking
and the SCS<1:0> bits (OSCCON<1:0>) select the
clock source. The individual modes, bit settings, clock
sources and affected modules are summarized in
Table 4-1.
4.1.1 CLOCK SOURCES
The SCS<1:0> bits allow the selection of one of three
clock sources for power-managed modes. They are:
• Primary clock source – Defined by the
FOSC<2:0> Configuration bits
• Timer1 clock – Provided by the secondary
oscillator
• Postscaled internal clock – Derived from the
internal oscillator block
4.1.2 ENTERING POWER-MANAGED
MODES
Switching from one clock source to another begins by
loading the OSCCON register. The SCS<1:0> bits
select the clock source.
Changing these bits causes an immediate switch to the
new clock source, assuming that it is running. The
switch also may be subject to clock transition delays.
These delays are discussed in Section 4.1.3 “Clock
Transitions and Status Indicators” and subsequent
sections.
Entry to the power-managed Idle or Sleep modes is
triggered by the execution of a SLEEP instruction. The
actual mode that results depends on the status of the
IDLEN bit.
Depending on the current mode and the mode being
switched to, a change to a power-managed mode does
not always require setting all of these bits. Many transi-
tions may be done by changing the oscillator select
bits, the IDLEN bit or the DSEN bit prior to issuing a
SLEEP instruction.
If the IDLEN and DSEN bits are already configured
correctly, it may only be necessary to perform a SLEEP
instruction to switch to the desired mode.
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DS39974A-page 48 Preliminary 2010 Microchip Technology Inc.
TABLE 4-1: LOW-POWER MODES
4.1.3 CLOCK TRANSITIONS AND STATUS
INDICATORS
The length of the transition between clock sources is
the sum of two cycles of the old clock source and three
to four cycles of the new clock source. This formula
assumes that the new clock source is stable.
Two bits indicate the current clock source and its
status: OSTS (OSCCON<3>) and SOSCRUN
(OSCCON2<6>). In general, only one of these bits will
be set in a given power-managed mode. When the
OSTS bit is set, the primary clock would be providing
the device clock. When the SOSCRUN bit is set, the
Timer1 oscillator would be providing the clock. If neither
of these bits is set, INTRC would be clocking the
device.
4.1.4 MULTIPLE SLEEP COMMANDS
The power-managed mode that is invoked with the
SLEEP instruction is determined by the setting of the
IDLEN and DSEN bits at the time the instruction is exe-
cuted. If another SLEEP instruction is executed, the
device will enter the power-managed mode specified
by IDLEN and DSEN at that time. If IDLEN or DSEN
have changed, the device will enter the new
power-managed mode specified by the new setting.
Mode DSCO NH<7> OSC CON<7,1: 0> Module Clocki ng Available Clock and Oscillat or Source
DSEN(1) IDLEN(1) SCS<1:0> CPU Peripherals
Sleep 00N/A Off Off Timer1 oscillator and/or RTCC may optionally be
enabled
Deep
Sleep(3) 10N/A Powered
off(2) Powered off RTCC can run uninterrupted using the Timer1 or
internal low-power RC oscillator
PRI_RUN 0N/A 00 Clocked Clocked The normal, full-power execution mode; primary
clock source (defined by FOSC<2:0>)
SEC_RUN 0N/A 01 Clocked Clocked Secondary – Timer1 oscillator
RC_RUN 0N/A 11 Clocked Clocked Postscaled internal clock
PRI_IDLE 0100Off Clocked Primary clock source (defined by FOSC<2:0>)
SEC_IDLE 0101Off Clocked Secondary – Timer1 oscillator
RC_IDLE 0111Off Clocked Postscaled internal clock
Note 1: IDLEN and DSEN reflect their values when the SLEEP instruction is executed.
2: Deep Sleep turns off the internal core voltage regulator to power down core logic. See Sec ti o n 4.6 “D eep Sl ee p
Mode” for more information.
3: Deep Sleep mode is only available on “F” devices, not “LF” devices.
Note: Executing a SLEEP instruction does not
necessarily place the device into Sleep
mode. It acts as the trigger to place the
controller into either the Sleep or Deep
Sleep mode, or one of the Idle modes,
depending on the setting of the IDLEN bit.
2010 Microchip Technology Inc. Preliminary DS39974A-page 49
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4.2 Run Modes
In the Run modes, clocks to both the core and
peripherals are active. The difference between these
modes is the clock source.
4.2.1 PRI_RUN MODE
The PRI_RUN mode is the normal, full-power execu-
tion mode of the microcontroller. This is also the default
mode upon a device Reset unless Two-Speed Start-up
is enabled (see Section 27.4 “Two-Speed Start-up”
for details). In this mode, the OSTS bit is set (see
Section 3.3.1 “Oscillator Control Register”).
4.2.2 SEC_RUN MODE
The SEC_RUN mode is the compatible mode to the
“clock switching” feature offered in other PIC18
devices. In this mode, the CPU and peripherals are
clocked from the Timer1 oscillator. This gives users the
option of low-power consumption while still using a
high-accuracy clock source.
SEC_RUN mode is entered by setting the SCS<1:0>
bits to ‘01’. The device clock source is switched to the
Timer1 oscillator (see Figure 4-1), the primary
oscillator is shut down, the SOSCRUN bit
(OSCCON2<6>) is set and the OSTS bit is cleared.
On transitions from SEC_RUN mode to PRI_RUN
mode, the peripherals and CPU continue to be clocked
from the Timer1 oscillator while the primary clock is
started. When the primary clock becomes ready, a
clock switch back to the primary clock occurs (see
Figure 4-2). When the clock switch is complete, the
SOSCRUN bit is cleared, the OSTS bit is set and the
primary clock would be providing the clock. The IDLEN
and SCS bits are not affected by the wake-up; the
Timer1 oscillator continues to run.
FIGURE 4-1: TRANSITION TI MI NG FOR ENTRY TO SEC _RUN MOD E
FIGU RE 4-2: TRANSI TION T I MING FR OM SE C_RU N MODE TO PRI_RU N MODE ( HSP LL)
Note: The Timer1 oscillator should already be
running prior to entering SEC_RUN mode.
If the T1OSCEN bit is not set when the
SCS<1:0> bits are set to ‘01’, entry to
SEC_RUN mode will not occur. If the
Timer1 oscillator is enabled, but not yet
running, device clocks will be delayed until
the oscillator has started. In such situa-
tions, initial oscillator operation is far from
stable and unpredictable operation may
result.
Q4Q3Q2
OSC1
Peripheral
Program
Q1
T1OSI
Q1
Counter
Clock
CPU
Clock
PC + 2PC
123 n-1n
Clock Transition
Q4Q3Q2 Q1 Q3Q2
PC + 4
Q1 Q3 Q4
OSC1
Peripheral
Program PC
T1OSI
PLL Clock
Q1
PC + 4
Q2
Output
Q3 Q4 Q1
CPU Clock
PC + 2
Clock
Counter
Q2 Q2 Q3
Note 1: TOST = 1024 TOSC; TPLL = 2 ms (approx). These intervals are not shown to scale.
SCS<1:0> Bits Changed
TPLL(1)
12 n-1n
Clock
OSTS Bit Set
Transition
TOST(1)
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DS39974A-page 50 Preliminary 2010 Microchip Technology Inc.
4.2.3 RC_RUN MODE
In RC_RUN mode, the CPU and peripherals are
clocked from the internal oscillator; the primary clock is
shut down. This mode provides the best power conser-
vation of all the Run modes while still executing code.
It works well for user applications, which are not highly
timing-sensitive or do not require high-speed clocks at
all times.
This mode is entered by setting the SCS<1:0> bits
(OSCCON<1:0>) to ‘11’. When the clock source is
switched to the internal oscillator block (see
Figure 4-3), the primary oscillator is shut down and the
OSTS bit is cleared.
On transitions from RC_RUN mode to PRI_RUN mode,
the device continues to be clocked from the INTOSC
block while the primary clock is started. When the
primary clock becomes ready, a clock switch to the
primary clock occurs (see Figure 4-4). When the clock
switch is complete, the OSTS bit is set and the primary
clock is providing the device clock. The IDLEN and
SCS bits are not affected by the switch. The INTRC
clock source will continue to run if either the WDT or the
FSCM is enabled.
FIGU RE 4- 3 : TRANSI T ION TIMING TO RC _RUN MO D E
FIGURE 4-4: TRANSITION TIMING FROM RC_RUN MODE TO PRI_RUN MODE
Q4Q3Q2
OSC1
Peripheral
Program
Q1
INTRC
Q1
Counter
Clock
CPU
Clock
PC + 2PC
123 n-1n
Clock Transition
Q4Q3Q2 Q1 Q3Q2
PC + 4
Q1 Q3 Q4
OSC1
Peripheral
Program PC
INTRC
PLL Clock
Q1
PC + 4
Q2
Output
Q3 Q4 Q1
CPU Clock
PC + 2
Clock
Counter
Q2 Q2 Q3
Note 1: TOST = 1024 TOSC; TPLL = 2 ms (approx). These intervals are not shown to scale.
SCS<1:0> Bits Changed
TPLL(1)
12 n-1n
Clock
OSTS Bit Set
Transition
TOST(1)
2010 Microchip Technology Inc. Preliminary DS39974A-page 51
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4.3 Sleep Mode
The power-managed Sleep mode is identical to the
legacy Sleep mode offered in all other PIC devices. It is
entered by clearing the IDLEN bit (the default state on
device Reset) and executing the SLEEP instruction.
This shuts down the selected oscillator (Figure 4-5). All
clock source status bits are cleared.
Entering the Sleep mode from any other mode does not
require a clock switch. This is because no clocks are
needed once the controller has entered Sleep mode. If
the WDT is selected, the INTRC source will continue to
operate. If the Timer1 oscillator is enabled, it will also
continue to run.
When a wake event occurs in Sleep mode (by interrupt,
Reset or WDT time-out), the device will not be clocked
until the clock source selected by the SCS<1:0> bits
becomes ready (see Figure 4-6), or it will be clocked
from the internal oscillator if either the Two-Speed
Start-up or the FSCM is enabled (see Section 27.0
“Special Features of the CPU”). In either case, the
OSTS bit is set when the primary clock is providing the
device clocks. The IDLEN and SCS bits are not
affected by the wake-up.
FIGURE 4-5: T RANSITION T IMING FOR ENTRY TO SLEEP MODE
FIGURE 4-6: T RANSITION T IMING FOR W AKE FROM SLEEP (HSPLL)
Q4Q3Q2
OSC1
Peripheral
Sleep
Program
Q1Q1
Counter
Clock
CPU
Clock
PC + 2PC
Q3 Q4 Q1 Q2
OSC1
Peripheral
Program PC
PLL Clock
Q3 Q4
Output
CPU Clock
Q1 Q2 Q3 Q4 Q1 Q2
Clock
Counter PC + 6PC + 4
Q1 Q2 Q3 Q4
Wake Event
Note 1: TOST = 1024 TOSC; TPLL = 2 ms (approx). These intervals are not shown to scale.
TOST(1) TPLL(1)
OSTS Bit Set
PC + 2
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4.4 Idle Modes
The Idle modes allow the controller’s CPU to be
selectively shut down while the peripherals continue to
operate. Selecting a particular Idle mode allows users
to further manage power consumption.
If the IDLEN bit is set to ‘1’ when a SLEEP instruction is
executed, the peripherals will be clocked from the clock
source selected using the SCS<1:0> bits; however, the
CPU will not be clocked. The clock source status bits are
not affected. Setting IDLEN and executing a SLEEP
instruction provides a quick method of switching from a
given Run mode to its corresponding Idle mode.
If the WDT is selected, the INTRC source will continue
to operate. If the Timer1 oscillator is enabled, it will also
continue to run.
Since the CPU is not executing instructions, the only
exits from any of the Idle modes are by interrupt, WDT
time-out or a Reset. When a wake event occurs, CPU
execution is delayed by an interval of T
CSD
(parameter 38, Table 30-14) while it becomes ready to
execute code. When the CPU begins executing code,
it resumes with the same clock source for the current
Idle mode. For example, when waking from RC_IDLE
mode, the internal oscillator block will clock the CPU
and peripherals (in other words, RC_RUN mode). The
IDLEN and SCS bits are not affected by the wake-up.
While in any Idle or Sleep mode, a WDT time-out will
result in a WDT wake-up to the Run mode currently
specified by the SCS<1:0> bits.
4.4.1 PRI_IDLE MODE
This mode is unique among the three low-power Idle
modes, in that it does not disable the primary device
clock. For timing-sensitive applications, this allows for
the fastest resumption of device operation with its more
accurate primary clock source, since the clock source
does not have to “warm up” or transition from another
oscillator.
PRI_IDLE mode is entered from PRI_RUN mode by
setting the IDLEN bit and executing a SLEEP instruc-
tion. If the device is in another Run mode, set IDLEN
first, then set the SCS bits to ‘00’ and execute SLEEP.
Although the CPU is disabled, the peripherals continue
to be clocked from the primary clock source specified
by the FOSC<1:0> Configuration bits. The OSTS bit
remains set (see Figure 4-7).
When a wake event occurs, the CPU is clocked from the
primary clock source. A delay of interval, TCSD, is
required between the wake event and when code
execution starts. This is required to allow the CPU to
become ready to execute instructions. After the
wake-up, the OSTS bit remains set. The IDLEN and
SCS bits are not affected by the wake-up (see
Figure 4-8).
4.4.2 SEC_IDLE MODE
In SEC_IDLE mode, the CPU is disabled but the
peripherals continue to be clocked from the Timer1
oscillator. This mode is entered from SEC_RUN by set-
ting the IDLEN bit and executing a SLEEP instruction. If
the device is in another Run mode, set IDLEN first, then
set SCS<1:0> to ‘01’ and execute SLEEP. When the
clock source is switched to the Timer1 oscillator, the
primary oscillator is shut down, the OSTS bit is cleared
and the SOSCRUN bit is set.
When a wake event occurs, the peripherals continue to
be clocked from the Timer1 oscillator. After an interval
of TCSD following the wake event, the CPU begins exe-
cuting code being clocked by the Timer1 oscillator. The
IDLEN and SCS bits are not affected by the wake-up;
the Timer1 oscillator continues to run (see Figure 4-8).
Note: The Timer1 oscillator should already be
running prior to entering SEC_IDLE mode.
If the T1OSCEN bit is not set when the
SLEEP instruction is executed, the SLEEP
instruction will be ignored and entry to
SEC_IDLE mode will not occur. If the
Timer1 oscillator is enabled, but not yet
running, peripheral clocks will be delayed
until the oscillator has started. In such
situations, initial oscillator operation is far
from stable and unpredictable operation
may result.
2010 Microchip Technology Inc. Preliminary DS39974A-page 53
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FIGURE 4-7: TRANSITION TIMING FOR ENTRY TO IDLE MODE
FIGURE 4-8: T RANSITION TIMING FOR W AKE FROM IDLE TO RUN MODE
Q1
Peripheral
Program PC PC + 2
OSC1
Q3 Q4 Q1
CPU Clock
Clock
Counter
Q2
OSC1
Peripheral
Program PC
CPU Clock
Q1 Q3 Q4
Clock
Counter
Q2
Wake Event
TCSD
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DS39974A-page 54 Preliminary 2010 Microchip Technology Inc.
4.4.3 RC_IDLE MODE
In RC_IDLE mode, the CPU is disabled but the
peripherals continue to be clocked from the internal
oscillator block. This mode allows for controllable
power conservation during Idle periods.
From RC_RUN, this mode is entered by setting the
IDLEN bit and executing a SLEEP instruction. If the
device is in another Run mode, first set IDLEN, then
clear the SCS bits and execute SLEEP. When the clock
source is switched to the INTOSC block, the primary
oscillator is shut down and the OSTS bit is cleared.
When a wake event occurs, the peripherals continue to
be clocked from the internal oscillator block. After a
delay of TCSD, following the wake event, the CPU
begins executing code being clocked by the INTRC.
The IDLEN and SCS bits are not affected by the
wake-up. The INTRC source will continue to run if
either the WDT or the FSCM is enabled.
4.5 Exiting Idle and Sleep Modes
An exit from Sleep mode, or any of the Idle modes, is
triggered by an interrupt, a Reset or a WDT time-out.
This section discusses the triggers that cause exits
from power-managed modes. The clocking subsystem
actions are discussed in each of the power-managed
modes sections (see Section 4.2 “Run Modes”,
Section 4.3 “Sleep Mode” and Section 4.4 “Idle
Modes”).
4.5.1 EXIT BY INTERRUPT
Any of the available interrupt sources can cause the
device to exit from an Idle mode, or the Sleep mode, to
a Run mode. To enable this functionality, an interrupt
source must be enabled by setting its enable bit in one
of the INTCON or PIE registers. The exit sequence is
initiated when the corresponding interrupt flag bit is set.
On all exits from Idle or Sleep modes by interrupt, code
execution branches to the interrupt vector if the
GIE/GIEH bit (INTCON<7>) is set. Otherwise, code
execution continues or resumes without branching
(see Section 9.0 “Interrupts”).
A fixed delay of interval, T
CSD, following the wake
event, is required when leaving Sleep mode. This delay
is required for the CPU to prepare for execution.
Instruction execution resumes on the first clock cycle
following this delay.
4.5.2 EXIT BY WDT TIME-OUT
A WDT time-out will cause different actions depending
on which power-managed mode the device is, when
the time-out occurs.
If the device is not executing code (all Idle modes and
Sleep mode), the time-out will result in an exit from the
power-managed mode (see Section 4.2 “Run
Modes” and Section 4.3 “Sleep M ode”). If the device
is executing code (all Run modes), the time-out will
result in a WDT Reset (see Section 27.2 “Watchdog
Timer (WDT)”).
The WDT and postscaler are cleared by one of the
following events:
• Executing a SLEEP or CLRWDT instruction
• The loss of a currently selected clock source (if
the FSCM is enabled)
4.5.3 EXIT BY RESET
Exiting an Idle or Sleep mode by Reset automatically
forces the device to run from the INTRC.
2010 Microchip Technology Inc. Preliminary DS39974A-page 55
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4.5.4 EXIT WITHOUT AN OSCILLATOR
START-UP DELAY
Certain exits from power-managed modes do not
invoke the OST at all. There are two cases:
• PRI_IDLE mode (where the primary clock source
is not stopped) and the primary clock source is
the EC mode
• PRI_IDLE mode and the primary clock source is
the ECPLL mode
In these instances, the primary clock source either
does not require an oscillator start-up delay, since it is
already running (PRI_IDLE), or normally does not
require an oscillator start-up delay (EC). However, a
fixed delay of interval, TCSD, following the wake event,
is still required when leaving Sleep and Idle modes to
allow the CPU to prepare for execution. Instruction
execution resumes on the first clock cycle following this
delay.
4.6 Deep Sleep Mode
Deep Sleep mode brings the device into its lowest
power consumption state without requiring the use of
external switches to remove power from the device.
During Deep Sleep, the on-chip VDDCORE voltage reg-
ulator is powered down, effectively disconnecting
power to the core logic of the microcontroller.
On devices that support it, the Deep Sleep mode is
entered by:
• Setting the REGSLP (WDTCON<7>) bit
• Clearing the IDLEN bit
• Clearing the GIE bit
• Setting the DSEN bit (DSCONH<7>)
• Executing one single-cycle NOP instruction
• Executing the SLEEP instruction immediately after
setting DSEN and the single NOP
(no interrupts in between)
In order to minimize the possibility of inadvertently enter-
ing Deep Sleep, the DSEN bit is cleared in hardware
two instruction cycles after having been set. Therefore,
in order to enter Deep Sleep, the SLEEP instruction must
be executed in the immediate instruction cycle after set-
ting DSEN. If DSEN is not set when SLEEP is executed,
the device will enter conventional Sleep mode instead.
During Deep Sleep, the core logic circuitry of the
microcontroller is powered down to reduce leakage
current. Therefore, most peripherals and functions of
the microcontroller become unavailable during Deep
Sleep. However, a few specific peripherals and func-
tions are powered directly from the VDD supply rail of
the microcontroller, and therefore, can continue to
function in Deep Sleep.
Entering Deep Sleep mode clears the DSWAKEL
register. However, if the Real-Time Clock and Calendar
(RTCC) is enabled prior to entering Deep Sleep, it will
continue to operate uninterrupted.
The device has a dedicated Brown-out Reset (DSBOR)
and Watchdog Timer Reset (DSWDT) for monitoring
voltage and time-out events in Deep Sleep. The
DSBOR and DSWDT are independent of the standard
BOR and WDT used with other power-managed modes
(Run, Idle and Sleep).
When a wake event occurs in Deep Sleep mode (by
MCLR Reset, RTCC alarm, INT0 interrupt, ULPWU or
DSWDT), the device will exit Deep Sleep mode and
perform a Power-on Reset (POR). When the device is
released from Reset, code execution will resume at the
device’s Reset vector.
4.6.1 PREPARING FOR DEEP SLEEP
Because VDDCORE could fall below the SRAM retention
voltage while in Deep Sleep mode, SRAM data could
be lost in Deep Sleep. Exiting Deep Sleep mode
causes a POR; as a result, most Special Function
Registers will reset to their default POR values.
Applications needing to save a small amount of data
throughout a Deep Sleep cycle can save the data to the
general purpose DSGPR0 and DSGPR1 registers. The
contents of these registers are preserved while the
device is in Deep Sleep, and will remain valid throughout
an entire Deep Sleep entry and wake-up sequence.
Note: Since Deep Sleep mode powers down the
microcontroller by turning off the on-chip
VDDCORE voltage regulator, Deep Sleep
capability is available only on PIC18FXXJ
members in the device family. The on-chip
voltage regulator is not available in
PIC18LFXXJ members of the device
family, and therefore, they do not support
Deep Sleep.
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DS39974A-page 56 Preliminary 2010 Microchip Technology Inc.
4.6.2 I/O PINS DURING DEEP SLEEP
During Deep Sleep, the general purpose I/O pins will
retain their previous states.
Pins that are configured as inputs (TRISx bit set) prior
to entry into Deep Sleep will remain high-impedance
during Deep Sleep.
Pins that are configured as outputs (TRISx bit clear)
prior to entry into Deep Sleep will remain as output pins
during Deep Sleep. While in this mode, they will drive
the output level determined by their corresponding LAT
bit at the time of entry into Deep Sleep.
When the device wakes back up, the I/O pin behavior
depends on the type of wake up source.
If the device wakes back up by an RTCC alarm, INT0
interrupt, DSWDT or ULPWU event, all I/O pins will
continue to maintain their previous states, even after the
device has finished the POR sequence and is executing
application code again. Pins configured as inputs during
Deep Sleep will remain high-impedance, and pins
configured as outputs will continue to drive their previous
value.
After waking up, the TRIS and LAT registers will be
reset, but the I/O pins will still maintain their previous
states. If firmware modifies the TRIS and LAT values
for the I/O pins, they will not immediately go to the
newly configured states. Once the firmware clears the
RELEASE bit (DSCONL<0>), the I/O pins will be
“released”. This causes the I/O pins to take the states
configured by their respective TRIS and LAT bit values.
If the Deep Sleep BOR (DSBOR) circuit is enabled, and
VDD drops below the DSBOR and VDD rail POR thresh-
olds, the I/O pins will be immediately released similar to
clearing the RELEASE bit. All previous state informa-
tion will be lost, including the general purpose DSGPR0
and DSGPR1 contents. See Section 4.6.5 “Deep
Sleep Brown-out Reset (DSBOR)” for additional
details regarding this scenario.
If a MCLR Reset event occurs during Deep Sleep, the
I/O pins will also be released automatically, but in this
case, the DSGPR0 and DSGPR1 contents will remain
valid.
In all other Deep Sleep wake-up cases, application
firmware needs to clear the RELEASE bit in order to
reconfigure the I/O pins.
4.6.3 DEEP SLEEP WAKE-UP SOURCES
The device can be awakened from Deep Sleep mode by
a MCLR, POR, RTCC, INT0 I/O pin interrupt, DSWDT or
ULPWU event. After waking, the device performs a
POR. When the device is released from Reset, code
execution will begin at the device’s Reset vector.
The software can determine if the wake-up was caused
from an exit from Deep Sleep mode by reading the DS
bit (WDTCON<3>). If this bit is set, the POR was
caused by a Deep Sleep exit. The DS bit must be
manually cleared by the software.
The software can determine the wake event source by
reading the DSWAKEH and DSWAKEL registers.
When the application firmware is done using the
DSWAKEH and DSWAKEL status registers, individual
bits do not need to be manually cleared before entering
Deep Sleep again. When entering Deep Sleep mode,
these registers are automatically cleared.
4.6.3.1 Wake-up Event Considerations
Deep Sleep wake-up events are only monitored while
the processor is fully in Deep Sleep mode. If a wake-up
event occurs before Deep Sleep mode is entered, the
event status will not be reflected in the DSWAKE
registers. If the wake-up source asserts prior to entering
Deep Sleep, the CPU will either go to the interrupt vector
(if the wake source has an interrupt bit and the interrupt
is fully enabled) or will abort the Deep Sleep entry
sequence by executing past the SLEEP instruction, if the
interrupt was not enabled. In this case, a wake-up event
handler should be placed after the SLEEP instruction to
process the event and re-attempt entry into Deep Sleep
if desired.
When the device is in Deep Sleep with more than one
wake-up source simultaneously enabled, only the first
wake-up source to assert will be detected and logged
in the DSWAKEH/DSWAKEL status registers.
4.6.4 DEEP SLEEP WATCHDOG TIMER
(DSWDT)
Deep Sleep has its own dedicated WDT (DSWDT) with
a postscaler for time-outs of 2.1 ms to 25.7 days,
configurable through the bits, DSWDTPS<3:0>.
The DSWDT can be clocked from either the INTRC or
the T1OSC/T1CKI input. If the T1OSC/T1CKI source
will be used with a crystal, the T1OSCEN bit in the
T1CON register needs to be set prior to entering Deep
Sleep. The reference clock source is configured through
the DSWDTOSC bit.
DSWDT is enabled through the DSWDTEN bit. Entering
Deep Sleep mode automatically clears the DSWDT. See
Section 27.0 “Special Features of the CPU” for more
information.
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4.6.5 DEEP SLEEP BROWN-OUT RESET
(DSBOR)
The Deep Sleep module contains a dedicated Deep Sleep
BOR (DSBOR) circuit. This circuit may be optionally
enabled through the DSBOREN Configuration bit.
The DSBOR circuit monitors the VDD supply rail
voltage. The behavior of the DSBOR circuit is
described in Section 5.4 “Brown-out Reset (BOR)”.
4.6.6 RTCC PERIPHERAL AND DEEP
SLEEP
The RTCC can operate uninterrupted during Deep
Sleep mode. It can wake the device from Deep Sleep
by configuring an alarm.
The RTCC clock source is configured with the
RTCOSC bit (CONFIG3L<1>). The available reference
clock sources are the INTRC and T1OSC/T1CKI. If the
INTRC is used, the RTCC accuracy will directly depend
on the INTRC tolerance. For more information on
configuring the RTCC peripheral, see Section 17.0
“Real-Time Clock and Calendar (RTCC)” .
4.6.7 TYPICAL DEEP SLEEP SEQUENCE
This section gives the typical sequence for using the Deep
Sleep mode. Optional steps are indicated and additional
information is given in notes at the end of the procedure.
1. Enable DSWDT (optional).(1)
2. Configure the DSWDT clock source (optional).(2)
3. Enable DSBOR (optional).(1)
4. Enable RTCC (optional).(3)
5. Configure the RTCC peripheral (optional).(3)
6. Configure the ULPWU peripheral (optional).(4)
7. Enable the INT0 Interrupt (optional).
8. Context save SRAM data by writing to the
DSGPR0 and DSGPR1 registers (optional).
9. Set the REGSLP bit (WDTCON<7>) and clear
the IDLEN bit (OSCCON<7>).
10. If using an RTCC alarm for wake-up, wait until
the RTCSYNC bit (RTCCFG<4>) is clear.
11. Enter Deep Sleep mode by setting the DSEN bit
(DSCONH<7>), execute a NOP and issue a
SLEEP instruction. The SLEEP instruction must
be executed within 2 instruction cycles of setting
the DSEN bit.
12. Once a wake-up event occurs, the device will
perform a POR Reset sequence. Code execution
resumes at the device’s Reset vector.
13. Determine if the device exited Deep Sleep by
reading the Deep Sleep bit, DS (WDTCON<3>).
This bit will be set if there was an exit from Deep
Sleep mode.
14. Clear the Deep Sleep bit, DS (WDTCON<3>).
15. Determine the wake-up source by reading the
DSWAKEH and DSWAKEL registers.
16. Determine if a DSBOR event occurred during
Deep Sleep mode by reading the DSBOR bit
(DSCONL<1>).
17. Read the DSGPR0 and DSGPR1 context save
registers (optional).
18. Clear the RELEASE bit (DSCONL<0>).
4.6.8 DEEP SLEEP FAULT DETECTION
If during Deep Sleep, the device is subjected to
unusual operating conditions, such as an Electrostatic
Discharge (ESD) event, it is possible that internal cir-
cuit states used by the Deep Sleep module could
become corrupted. If this were to happen, the device
may exhibit unexpected behavior, such as a failure to
wake back up.
In order to prevent this type of scenario from occurring,
the Deep Sleep module includes automatic
self-monitoring capability. During Deep Sleep, critical
internal nodes are continuously monitored in order to
detect possible Fault conditions (which would not
ordinarily occur). If a Fault condition is detected, the
circuitry will set the DSFLT status bit (DSWAKEL<7>)
and automatically wake the microcontroller from Deep
Sleep, causing a POR Reset.
During Deep Sleep, the Fault detection circuitry is
always enabled and does not require any specific
configuration prior to entering Deep Sleep.
Note 1: DSWDT and DSBOR are enabled
through the devices’ Configuration bits.
For more information, see Section 27.1
“Configuration Bits”.
2: The DSWDT and RTCC clock sources
are selected through the devices’ Con-
figuration bits. For more information, see
Section 27.1 “Configuration Bits”.
3: For more information, see Section 17.0
“Real-Time Clock and Calendar
(RTCC)”.
4: For more information on configuring this
peripheral, see Section 4.7 “Ultra
Low-Power Wake-up”.
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DS39974A-page 58 Preliminary 2010 Microchip Technology Inc.
4.6.9 DEEP SLEEP MODE REGISTERS
Deep Sleep mode registers are provided in
Register 4-1 through Register 4-6.
REGISTER 4-1: DSCONH: DEEP SLEEP CONTROL HIGH BYTE REGISTER (BANKED F4Dh)
R/W-0 U-0 U-0 U-0 U-0 R/W-0 R/W-0 R/W-0
DSEN(1) — — — — r DSULPEN RTCWDIS
bit 7 bit 0
Legend: r = Reserved bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 DSEN: Deep Sleep Enable bit(1)
1 = Deep Sleep mode is entered on a SLEEP command
0 = Sleep mode is entered on a SLEEP command
bit 6-3 Unimplemented: Read as ‘0’
bit 2 Reserved: Maintain as ‘0’
bit 1 DSULPEN: Ultra Low-Power Wake-up Module Enable bit
1 = ULPWU module is enabled in Deep Sleep
0 = ULPWU module is disabled in Deep Sleep
bit 0 RTCWDIS: RTCC Wake-up Disable bit
1 = Wake-up from RTCC is disabled
0 = Wake-up from RTCC is enabled
Note 1: In order to enter Deep Sleep, Sleep must be executed within 2 instruction cycles after setting DSEN.
REGISTER 4-2: DSCONL: DEEP SLEEP LOW BYTE CONTROL REGISTER (BANKED F4Ch)
U-0 U-0 U-0 U-0 U-0 R/W-0 R/W-0(1) R/W-0(1)
— — — — — ULPWDIS DSBOR RELEASE
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-3 Unimplemented: Read as ‘0’
bit 2 ULPWDIS: Ultra Low-Power Wake-up Disable bit
1 = ULPWU wake-up source is disabled
0 = ULPWU wake-up source is enabled (must also set DSULPEN = 1)
bit 1 DSBOR: Deep Sleep BOR Event Status bit
1 = DSBOREN was enabled and VDD dropped below the DSBOR arming voltage during Deep Sleep,
but did not fall below VDSBOR
0 = DSBOREN was disabled or VDD did not drop below the DSBOR arming voltage during Deep
Sleep
bit 0 RELEASE: I/O Pin State Release bit
Upon waking from Deep Sleep, the I/O pins maintain their previous states. Clearing this bit will
release the I/O pins and allow their respective TRIS and LAT bits to control their states.
Note 1: This is the value when VDD is initially applied.
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REGISTER 4-3: DSGPR0: DEEP SLEEP PERSISTENT GENERAL PURPOSE REGISTER 0
(BANKED F4Eh)
R/W-xxxx(1)
Deep Sleep Persistent General Purpose bits
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-0 Deep Sleep Persistent General Purpose bits
Contents are retained even in Deep Sleep mode.
Note 1: All register bits are maintained unless VDDCORE drops below the normal BOR threshold outside of Deep
Sleep, or the device is in Deep Sleep and the dedicated DSBOR is enabled and VDD drops below the
DSBOR threshold, or DSBOR is enabled or disabled, but VDD is hard cycled to near VSS.
REGISTER 4-4: DSGPR1: DEEP SLEEP PERSISTENT GENERAL PURPOSE REGISTER 1
(BANKED F4Fh)
R/W-xxxx(1)
Deep Sleep Persistent General Purpose bits
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-0 Deep Sleep Persistent General Purpose bits
Contents are retained even in Deep Sleep mode.
Note 1: All register bits are maintained unless VDDCORE drops below the normal BOR threshold outside of Deep
Sleep, or the device is in Deep Sleep and the dedicated DSBOR is enabled and VDD drops below the
DSBOR threshold, or DSBOR is enabled or disabled, but VDD is hard cycled to near VSS.
REGISTER 4-5: DSWAKEH: DEEP SLEEP WAKE HIGH BYTE REGISTER (BANKED F4Bh)
U-0 U-0 U-0 U-0 U-0 U-0 U-0 R/W-0
— — — — — — —DSINT0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-1 Unimplemented: Read as ‘0’
bit 0 DSINT0: Interrupt-on-Change bit
1 = Interrupt-on-change was asserted during Deep Sleep
0 = Interrupt-on-change was not asserted during Deep Sleep
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DS39974A-page 60 Preliminary 2010 Microchip Technology Inc.
REGISTER 4-6: DSWAKEL: DEEP SLEEP WAKE LOW BYTE REGISTER (BANKED F4Ah)
R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 U-0 R/W-1
DSFLT — DSULP DSWDT DSRTC DSMCLR — DSPOR
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 DSFLT: Deep Sleep Fault Detected bit
1 = A Deep Sleep Fault was detected during Deep Sleep
0 = A Deep Sleep Fault was not detected during Deep Sleep
bit 6 Unimplemented: Read as ‘0’
bit 5 DSULP: Ultra Low-Power Wake-up Status bit
1 = An ultra low-power wake-up event occurred during Deep Sleep
0 = An ultra low-power wake-up event did not occur during Deep Sleep
bit 4 DSWDT: Deep Sleep Watchdog Timer Time-out bit
1 = The Deep Sleep Watchdog Timer timed out during Deep Sleep
0 = The Deep Sleep Watchdog Timer did not time out during Deep Sleep
bit 3 DSRTC: Real-Time Clock and Calendar Alarm bit
1 = The Real-Time Clock/Calendar triggered an alarm during Deep Sleep
0 = The Real-Time Clock /Calendar did not trigger an alarm during Deep Sleep
bit 2 DSMCLR: MCLR Event bit
1 = The MCLR pin was asserted during Deep Sleep
0 = The MCLR pin was not asserted during Deep Sleep
bit 1 Unimplemented: Read as ‘0’
bit 0 DSPOR: Power-on Reset Event bit
1 = The VDD supply POR circuit was active and a POR event was detected(1)
0 = The VDD supply POR circuit was not active, or was active, but did not detect a POR event
Note 1: Unlike the other bits in this register, this bit can be set outside of Deep Sleep.
2010 Microchip Technology Inc. Preliminary DS39974A-page 61
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4.7 Ultra Low-Power Wake-up
The Ultra Low-Power Wake-up (ULPWU) on RA0 allows
a slow falling voltage to generate an interrupt-on-change
without excess current consumption.
Follow these steps to use this feature:
1. Configure a remappable output pin to output the
ULPOUT signal.
2. Map an INTx interrupt-on-change input function to
the same pin as used for the ULPOUT output func-
tion. Alternatively, in Step 1, configure ULPOUT to
output onto a PORTB interrupt-on-change pin.
3. Charge the capacitor on RA0 by configuring the
RA0 pin to an output and setting it to ‘1’.
4. Enable interrupt-on-change (PIE bit) for the
corresponding pin selected in Step 2.
5. Stop charging the capacitor by configuring RA0
as an input.
6. Discharge the capacitor by setting the ULPEN
and ULPSINK bits in the WDTCON register.
7. Configure Sleep mode.
8. Enter Sleep mode.
When the voltage on RA0 drops below VIL, an interrupt
will be generated, which will cause the device to
wake-up and execute the next instruction.
This feature provides a low-power technique for
periodically waking up the device from Sleep mode.
The time-out is dependent on the discharge time of the
RC circuit on RA0.
When the ULPWU module causes the device to
wake-up from Sleep mode, the ULPLVL (WDTCON<5>)
bit is set. When the ULPWU module causes the device
to wake-up from Deep Sleep, the DSULP
(DSWAKEL<5>) bit is set. Software can check these bits
upon wake-up to determine the wake-up source. Also in
Sleep mode, only the remappable output function,
ULPWU, will output this bit value to an RPn pin for
externally detecting wake-up events.
See Example 4-1 for initializing the ULPWU module.
Note: For module related bit definitions, see the
WDTCON register in Section 27.2
“Watchdog Timer (WDT)” and the
DSWAKEL register (Register 4-6).
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DS39974A-page 62 Preliminary 2010 Microchip Technology Inc.
EXAMPLE 4-1: ULTRA LOW-POWER WAKE-UP INITIALIZATION
//*********************************************************************************
//Configure a remappable output pin with interrupt capability
//for ULPWU function (RP21 => RD4/INT1 in this example)
//*********************************************************************************
RPOR21 = 13;// ULPWU function mapped to RP21/RD4
RPINR1 = 21;// INT1 mapped to RP21 (RD4)
//***************************
//Charge the capacitor on RA0
//***************************
TRISAbits.TRISA0 = 0;
PORTAbits.RA0 = 1;
for(i = 0; i < 10000; i++) Nop();
//**********************************
//Stop Charging the capacitor on RA0
//**********************************
TRISAbits.TRISA0 = 1;
//*****************************************
//Enable the Ultra Low Power Wakeup module
//and allow capacitor discharge
//*****************************************
WDTCONbits.ULPEN = 1;
WDTCONbits.ULPSINK = 1;
//******************************************
//Enable Interrupt for ULPW
//******************************************
//For Sleep
//(assign the ULPOUT signal in the PPS module to a pin
//which has also been assigned an interrupt capability,
//such as INT1)
INTCON3bits.INT1IF = 0;
INTCON3bits.INT1IE = 1;
//********************
//Configure Sleep Mode
//********************
//For Sleep
OSCCONbits.IDLEN = 0;
//For Deep Sleep
OSCCONbits.IDLEN = 0; // enable deep sleep
DSCONHbits.DSEN = 1; // Note: must be set just before executing Sleep();
//****************
//Enter Sleep Mode
//****************
Sleep();
// for sleep, execution will resume here
// for deep sleep, execution will restart at reset vector (use WDTCONbits.DS to detect)
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A series resistor between RA0 and the external
capacitor provides overcurrent protection for the
RA0/AN0/C1INA/ULPWU/RP0 pin and can allow for
software calibration of the time-out (see Figure 4-9).
FIGURE 4-9: SERIAL RESISTOR
A timer can be used to measure the charge time and
discharge time of the capacitor. The charge time can
then be adjusted to provide the desired interrupt delay.
This technique will compensate for the affects of
temperature, voltage and component accuracy. The
ULPWU peripheral can also be configured as a simple
Programmable Low-Voltage Detect (LVD) or
temperature sensor.
4.8 Periphera l Module Disable
All peripheral modules (except for I/O ports) also have
a second control bit that can disable their functionality.
These bits, known as the Peripheral Module Disable
(PMD) bits, are generically named “xxxMD” (using
“xxx” as the mnemonic version of the module’s name).
These bits are located in the PMDISx special function
registers. In contrast to the module enable bits (gener-
ically named “xxxEN” and located in bit position seven
of the control registers), the PMD bits must be set (= 1)
to disable the modules.
While the PMD and module enable bits both disable a
peripheral’s functionality, the PMD bit completely shuts
down the peripheral, effectively powering down all
circuits and removing all clock sources. This has the
additional effect of making any of the module’s control
and buffer registers, mapped in the SFR space,
unavailable for operations. Essentially, the peripheral
ceases to exist until the PMD bit is cleared.
This differs from using the module enable bit, which
allows the peripheral to be reconfigured and buffer
registers preloaded, even when the peripheral’s
operations are disabled.
The PMD bits are most useful in highly power-sensitive
applications. In these cases, the bits can be set before
the main body of the application to remove peripherals
that will not be needed at all.
Note: For more information, refer to AN879,
“Using the Microchip Ultra Low-Power
Wake-up Module” application note
(DS00879).
R1
C1
RA0
TABLE 4-2: LOW-POWER MODE REGISTERS
Register Bit 7 Bit 6 Bi t 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Value on
POR, BOR
PMDIS3 CCP10MD CCP9MD CCP8MD CCP7MD CCP6MD CCP5MD CCP4MD — 0000 000–
PMDIS2 —TMR8MD— TMR6MD TMR5MD CMP3MD CMP2MD CMP1MD –0–0 0000
PMDIS1 PSPMD(1) CTMUMD RTCCMD(2) TMR4MD TMR3MD TMR2MD TMR1MD —0000 000–
PMDIS0 ECCP3MD ECCP2MD ECCP1MD UART2MD UART1MD SPI2MD SP11MD ADCMD 0000 0000
Note 1: Not implemented on 28-pin devices (PIC18F26J13, PIC18F27J13, PIC18LF26J13 and PIC18LF27J13).
2: To prevent accidental RTCC changes, the RTCCMD bit is normally locked. Use the following unlock sequence (with
interrupts disabled) to successfully modify the RTCCMD bit:
1. Write 55h to EECON2.
2. Write 0AAh to EECON2.
3. Immediately write the modified RTCCMD setting to PMDIS1.
PIC18F47J13 FAMILY
DS39974A-page 64 Preliminary 2010 Microchip Technology Inc.
NOTES:
2010 Microchip Technology Inc. Preliminary DS39974A-page 65
PIC18F47J13 FAMILY
5.0 RESET
The PIC18F47J13 family of devices differentiates
among various kinds of Reset:
a) Power-on Reset (POR)
b) MCLR Reset during normal operation
c) MCLR Reset during power-managed modes
d) Watchdog Timer (WDT) Reset (during
execution)
e) Configuration Mismatch (CM)
f) Brown-out Reset (BOR)
g) RESET Instruction
h) Stack Full Reset
i) Stack Underflow Reset
j) Deep Sleep Reset
This section discusses Resets generated by MCLR,
POR and BOR, and covers the operation of the various
start-up timers.
For information on WDT Resets, see Section 27.2
“Watchdog Timer (WDT)”. For Stack Reset events,
see Section 6.1.4.4 “Stack Full and Underflow
Resets” and for Deep Sleep mode, see Section 4.6
“Deep Sleep Mode”.
Figure 5-1 provides a simplified block diagram of the
on-chip Reset circuit.
5.1 RCON Register
Device Reset events are tracked through the RCON
register (Register 5-1). The lower five bits of the register
indicate that a specific Reset event has occurred. In
most cases, these bits can only be set by the event and
must be cleared by the application after the event. The
state of these flag bits, taken together, can be read to
indicate the type of Reset that just occurred. This is
described in more detail in Section 5.7 “Reset State of
Registers”.
The RCON register also has a control bit for setting
interrupt priority (IPEN). Interrupt priority is discussed
in Section 9 .0 “Interrupts”.
FIGURE 5-1: SIMPLIFIED BLOCK DIAGRAM OF ON-CHIP RESET CIRCUIT
External Reset
MCLR
VDD
WDT
Time-out
VDD Rise
Detect
PWRT
INTRC
POR Pulse
Chip_Reset
Brown-out
Reset(1)
RESET Instruction
Stack
Pointer
Stack Full/Underflow Reset
Sleep
( )_IDLE
PWRT
S
RQ
Configuration Word Mismatch
Deep Sleep Reset
Note 1: The VDD monitoring BOR circuit can be enabled or disabled on “LF” devices based on the CONFIG3L<DSBOREN>
Configuration bit. On “F” devices, the VDD monitoring BOR circuit is only enabled during Deep Sleep mode by
CONFIG3L<DSBOREN>.
2: The VDDCORE monitoring BOR circuit is only implemented on “F” devices. It is always used, except while in Deep
Sleep mode. The VDDCORE monitoring BOR circuit has a trip point threshold of VBOR (parameter D005).
VDDCORE
Brown-out
Reset(2)
LF: 11-Bit Ripple Counter
F: 4-Bit Ripple Counter
PIC18F47J13 FAMILY
DS39974A-page 66 Preliminary 2010 Microchip Technology Inc.
REGISTER 5-1: RCON: RESET CONTROL REGISTER (A CCESS FD0h)
R/W-0 U-0 R/W-1 R/W-1 R-1 R-1 R/W-0 R/W-0
IPEN —CMRI TO PD POR BOR
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 IPEN: Interrupt Priority Enable bit
1 = Enable priority levels on interrupts
0 = Disable priority levels on interrupts (PIC16CXXX Compatibility mode)
bit 6 Unimplemented: Read as ‘0’
bit 5 CM: Configuration Mismatch Flag bit
1 = A Configuration Mismatch Reset has not occurred
0 = A Configuration Mismatch Reset has occurred (must be set in software after a Configuration
Mismatch Reset occurs)
bit 4 RI: RESET Instruction Flag bit
1 = The RESET instruction was not executed (set by firmware only)
0 = The RESET instruction was executed causing a device Reset (must be set in software after a
Brown-out Reset occurs)
bit 3 TO: Watchdog Time-out Flag bit
1 = Set by power-up, CLRWDT instruction or SLEEP instruction
0 = A WDT time-out occurred
bit 2 PD: Power-Down Detection Flag bit
1 = Set by power-up or by the CLRWDT instruction
0 = Set by execution of the SLEEP instruction
bit 1 POR: Power-on Reset Status bit
1 = A Power-on Reset has not occurred (set by firmware only)
0 = A Power-on Reset occurred (must be set in software after a Power-on Reset occurs)
bit 0 BOR: Brown-out Reset Status bit
1 = A Brown-out Reset has not occurred (set by firmware only)
0 = A Brown-out Reset occurred (must be set in software after a Brown-out Reset occurs)
Note 1: It is recommended that the POR bit be set after a Power-on Reset has been detected, so that subsequent
Power-on Resets may be detected.
2: If the on-chip voltage regulator is disabled, BOR remains ‘0’ at all times. See Section 5.4.1 “Detecting
BOR” for more information.
3: Brown-out Reset is said to have occurred when BOR is ‘0’ and POR is ‘1’ (assuming that POR was set to
‘1’ by software immediately after a Power-on Reset).
2010 Microchip Technology Inc. Preliminary DS39974A-page 67
PIC18F47J13 FAMILY
5.2 Master Clear (MCLR)
The Master Clear Reset (MCLR) pin provides a method
for triggering a hard external Reset of the device. A
Reset is generated by holding the pin low. PIC18
extended microcontroller devices have a noise filter in
the MCLR Reset path, which detects and ignores small
pulses.
The MCLR pin is not driven low by any internal Resets,
including the WDT.
5.3 Power-on Reset (POR)
A POR condition is generated on-chip whenever VDD
rises above a certain threshold. This allows the device
to start in the initialized state when VDD is adequate for
operation.
To take advantage of the POR circuitry, tie the MCLR
pin through a resistor (1 k to 10 k) to VDD. This will
eliminate external RC components usually needed to
create a POR delay.
When the device starts normal operation (i.e., exits the
Reset condition), device operating parameters
(voltage, frequency, temperature, etc.) must be met to
ensure operation. If these conditions are not met, the
device must be held in Reset until the operating
conditions are met.
POR events are captured by the POR bit (RCON<1>).
The state of the bit is set to ‘0’ whenever a Power-on
Reset occurs; it does not change for any other Reset
event. POR is not reset to ‘1’ by any hardware event.
To capture multiple events, the user manually resets
the bit to ‘1’ in software following any POR.
5.4 Brown-out Reset (BOR)
The “F” devices in the PIC18F47J13 family incorporate
two types of BOR circuits: one which monitors
VDDCORE and one which monitors VDD. Only one BOR
circuit can be active at a time. When in normal Run
mode, Idle or normal Sleep modes, the BOR circuit that
monitors VDDCORE is active and will cause the device
to be held in BOR if VDDCORE drops below VBOR
(parameter D005). Once VDDCORE rises back above
VBOR, the device will be held in Reset until the
expiration of the Power-up Timer, with period, TPWRT
(parameter 33).
During Deep Sleep operation, the on-chip core voltage
regulator is disabled and VDDCORE is allowed to drop to
VSS. If the Deep Sleep BOR circuit is enabled by the
DSBOREN bit (CONFIG3L<2> = 1), it will monitor VDD.
If VDD drops below the VDSBOR threshold, the device
will be held in a Reset state similar to POR. All registers
will be set back to their POR Reset values and the con-
tents of the DSGPR0 and DSGPR1 holding registers
will be lost. Additionally, if any I/O pins had been
configured as outputs during Deep Sleep, these pins
will be tri-stated and the device will no longer be held in
Deep Sleep. Once the VDD voltage recovers back
above the VDSBOR threshold, and once the core
voltage regulator achieves a VDDCORE voltage above
VBOR, the device will begin executing code again
normally, but the DS bit in the WDTCON register will
not be set. The device behavior will be similar to hard
cycling all power to the device.
On “LF” devices (ex: PIC18LF47J13), the VDDCORE
BOR circuit is always disabled because the internal
core voltage regulator is disabled. Instead of monitor-
ing VDDCORE, PIC18LF devices in this family can still
use the VDD BOR circuit to monitor VDD excursions
below the VDSBOR threshold. The VDD BOR circuit can
be disabled by setting the DSBOREN bit = 0.
The VDD BOR circuit is enabled when DSBOREN = 1
on “LF” devices, or on “F” devices while in Deep Sleep
with DSBOREN = 1. When enabled, the VDD BOR cir-
cuit is extremely low power (typ. 200nA) during normal
operation above ~2.3V on VDD. If VDD drops below this
DSBOR arming level when the VDD BOR circuit is
enabled, the device may begin to consume additional
current (typ. 50 A) as internal features of the circuit
power-up. The higher current is necessary to achieve
more accurate sensing of the VDD level. However, the
device will not enter Reset until VDD falls below the
VDSBOR threshold.
5.4.1 DETECTING BOR
The BOR bit always resets to ‘0’ on any VDDCORE
Brown-out Reset or Power-on Reset event. This makes
it difficult to determine if a Brown-out Reset event has
occurred just by reading the state of BOR alone. A
more reliable method is to simultaneously check the
state of both POR and BOR. This assumes that the
POR bit is reset to ‘1’ in software immediately after any
Power-on Reset event. If BOR is ‘0’ while POR is ‘1’, it
can be reliably assumed that a Brown-out Reset event
has occurred.
If the voltage regulator is disabled (LF device), the
VDDCORE BOR functionality is disabled. In this case,
the BOR bit cannot be used to determine a Brown-out
Reset event. The BOR bit is still cleared by a Power-on
Reset event.
PIC18F47J13 FAMILY
DS39974A-page 68 Preliminary 2010 Microchip Technology Inc.
5.5 Configuration Mismatch (CM)
The Configuration Mismatch (CM) Reset is designed to
detect, and attempt to recover from, random memory
corrupting events. These include Electrostatic
Discharge (ESD) events, which can cause widespread
single bit changes throughout the device and result in
catastrophic failure.
In PIC18FXXJ Flash devices, the device Configuration
registers (located in the configuration memory space)
are continuously monitored during operation by com-
paring their values to complimentary shadow registers.
If a mismatch is detected between the two sets of
registers, a CM Reset automatically occurs. These
events are captured by the CM bit (RCON<5>). The
state of the bit is set to ‘0’ whenever a CM event occurs;
it does not change for any other Reset event.
A CM Reset behaves similarly to MCLR, RESET
instruction, WDT time-out or Stack Event Resets. As
with all hard and power Reset events, the device
Configuration Words are reloaded from the Flash
Configuration Words in program memory as the device
restarts.
5.6 Power-up Timer (PWRT)
PIC18F47J13 family devices incorporate an on-chip
PWRT to help regulate the POR process. The PWRT is
always enabled. The main function is to ensure that the
device voltage is stable before code is executed.
The Power-up Timer (PWRT) of the PIC18F47J13 family
devices is a counter which uses the INTRC source as
the clock input. While the PWRT is counting, the device
is held in Reset.
The power-up time delay depends on the INTRC clock
and will vary from chip-to-chip due to temperature and
process variation. See DC parameter 33 (TPWRT) for
details.
5.6.1 TIME-OUT SEQUENCE
The PWRT time-out is invoked after the POR pulse has
cleared. The total time-out will vary based on the status
of the PWRT. Figure 5-2, Figure 5-3, Figure 5-4 and
Figure 5-5 all depict time-out sequences on power-up
with the PWRT.
Since the time-outs occur from the POR pulse, if MCLR
is kept low long enough, the PWRT will expire. Bringing
MCLR high will begin execution immediately if a clock
source is available (Figure 5-4). This is useful for
testing purposes or to synchronize more than one
PIC18F device operating in parallel.
FIGURE 5-2: TI ME-OUT SEQUENCE ON POWER-UP (MCLR TIED TO VDD, VDD RISE < TPWRT)
TPWRT
VDD
MCLR
INTERNAL POR
PWRT TIME-OUT
INTERNAL RESET
2010 Microchip Technology Inc. Preliminary DS39974A-page 69
PIC18F47J13 FAMILY
FIGURE 5-3: TI ME-OUT SEQUENCE ON POWER-UP (MCLR NOT TIED TO VDD): CASE 1
FIGURE 5-4: TI ME-OUT SEQUENCE ON POWER-UP (MCLR NOT TIED TO VDD): CASE 2
FIGURE 5-5: SLOW RISE TIME (MCLR TIED TO VDD, VDD RISE > TPWRT)
TPWRT
VDD
MCLR
INTERNAL POR
PWRT TIME-OUT
INTERNAL RESET
VDD
MCLR
INTERNAL POR
PWRT TIME-OUT
INTERNAL RESET
TPWRT
VDD
MCLR
INTERNAL POR
PWRT TIME-OUT
INTERNAL RESET
0V 1V
3.3V
TPWRT
PIC18F47J13 FAMILY
DS39974A-page 70 Preliminary 2010 Microchip Technology Inc.
5.7 Reset State of Registers
Most registers are unaffected by a Reset. Their status
is unknown on POR and unchanged by all other
Resets. The other registers are forced to a “Reset
state” depending on the type of Reset that occurred.
Most registers are not affected by a WDT wake-up,
since this is viewed as the resumption of normal
operation. Status bits from the RCON register (CM, RI,
TO, PD, POR and BOR) are set or cleared differently in
different Reset situations, as indicated in Table 5-1.
These bits are used in software to determine the nature
of the Reset.
Table 5-2 describes the Reset states for all of the
Special Function Registers. These are categorized by
POR and BOR, MCLR and WDT Resets and WDT
wake-ups.
TABLE 5-1: STATUS BITS, THEIR SIGNIFICANCE AND THE INITIALIZATION CONDITION FOR
RCON REGISTER
Condition Program
Counter(1) RCON Register STKPTR Register
CM RI TO PD POR BOR STKFUL STKUNF
Power-on Reset 0000h 111100 0 0
RESET instruction 0000h u0uuuu u u
Brown-out Reset 0000h 1111u0 u u
Configuration Mismatch Reset 0000h 0uuuuu u u
MCLR Reset during
power-managed Run modes
0000h uu1uuu u u
MCLR Reset during
power-managed Idle modes and
Sleep mode
0000h uu10uu u u
MCLR Reset during full-power
execution
0000h uuuuuu u u
Stack Full Reset (STVREN = 1) 0000h uuuuuu 1 u
Stack Underflow Reset
(STVREN = 1)
0000h uuuuuu u 1
Stack Underflow Error (not an
actual Reset, STVREN = 0)
0000h uuuuuu u 1
WDT time-out during full-power
or power-managed Run modes
0000h uu0uuu u u
WDT time-out during
power-managed Idle or Sleep
modes
PC + 2 uu00uu u u
Interrupt exit from
power-managed modes
PC + 2 uuu0uu u u
Legend: u = unchanged
Note 1: When the wake-up is due to an interrupt and the GIEH or GIEL bit is set, the PC is loaded with the
interrupt vector (0008h or 0018h).
2010 Microchip Technology Inc. Preliminary DS39974A-page 71
PIC18F47J13 FAMILY
TABLE 5-2: INITIALIZATION CONDITIONS FOR ALL REGISTERS
Register Applicable Devices
Power-on Reset,
Brown-out Reset,
Wake From Deep
Sleep
MCLR Rese ts
WDT Reset
RESET Instruction
Stack Resets
CM Resets
W ake-up via WDT
or Interrupt
TOSU PIC18F2XJ13 PIC18F4XJ13 ---0 0000 ---0 0000 ---u uuuu(1)
TOSH PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu(1)
TOSL PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu(1)
STKPTR PIC18F2XJ13 PIC18F4XJ13 00-0 0000 uu-0 0000 uu-u uuuu(1)
PCLATU PIC18F2XJ13 PIC18F4XJ13 ---0 0000 ---0 0000 ---u uuuu
PCLATH PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
PCL PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 PC + 2(2)
TBLPTRU PIC18F2XJ13 PIC18F4XJ13 --00 0000 --00 0000 --uu uuuu
TBLPTRH PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
TBLPTRL PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
TABLAT PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
PRODH PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
PRODL PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
INTCON PIC18F2XJ13 PIC18F4XJ13 0000 000x 0000 000u uuuu uuuu(3)
INTCON2 PIC18F2XJ13 PIC18F4XJ13 1111 1111 1111 1111 uuuu uuuu(3)
INTCON3 PIC18F2XJ13 PIC18F4XJ13 1100 0000 1100 0000 uuuu uuuu(3)
INDF0 PIC18F2XJ13 PIC18F4XJ13 N/A N/A N/A
POSTINC0 PIC18F2XJ13 PIC18F4XJ13 N/A N/A N/A
POSTDEC0 PIC18F2XJ13 PIC18F4XJ13 N/A N/A N/A
PREINC0 PIC18F2XJ13 PIC18F4XJ13 N/A N/A N/A
PLUSW0 PIC18F2XJ13 PIC18F4XJ13 N/A N/A N/A
FSR0H PIC18F2XJ13 PIC18F4XJ13 ---- 0000 ---- 0000 ---- uuuu
FSR0L PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
WREG PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
INDF1 PIC18F2XJ13 PIC18F4XJ13 N/A N/A N/A
POSTINC1 PIC18F2XJ13 PIC18F4XJ13 N/A N/A N/A
POSTDEC1 PIC18F2XJ13 PIC18F4XJ13 N/A N/A N/A
PREINC1 PIC18F2XJ13 PIC18F4XJ13 N/A N/A N/A
PLUSW1 PIC18F2XJ13 PIC18F4XJ13 N/A N/A N/A
FSR1H PIC18F2XJ13 PIC18F4XJ13 ---- 0000 ---- 0000 ---- uuuu
FSR1L PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
BSR PIC18F2XJ13 PIC18F4XJ13 ---- 0000 ---- 0000 ---- uuuu
Legend: u = unchanged, x = unknown, - = unimplemented bit, read as ‘0’, q = value depends on condition.
Note 1: When the wake-up is due to an interrupt and the GIEL or GIEH bit is set, the TOSU, TOSH and TOSL are
updated with the current value of the PC. The STKPTR is modified to point to the next location in the
hardware stack.
2: When the wake-up is due to an interrupt and the GIEL or GIEH bit is set, the PC is loaded with the interrupt
vector (0008h or 0018h).
3: One or more bits in the INTCONx or PIRx registers will be affected (to cause wake-up).
4: See Table 5-1 for the Reset value for a specific condition.
5: Not implemented on PIC18F2XJ13 devices.
6: Not implemented on “LF” devices.
PIC18F47J13 FAMILY
DS39974A-page 72 Preliminary 2010 Microchip Technology Inc.
INDF2 PIC18F2XJ13 PIC18F4XJ13 N/A N/A N/A
POSTINC2 PIC18F2XJ13 PIC18F4XJ13 N/A N/A N/A
POSTDEC2 PIC18F2XJ13 PIC18F4XJ13 N/A N/A N/A
PREINC2 PIC18F2XJ13 PIC18F4XJ13 N/A N/A N/A
PLUSW2 PIC18F2XJ13 PIC18F4XJ13 N/A N/A N/A
FSR2H PIC18F2XJ13 PIC18F4XJ13 ---- 0000 ---- 0000 ---- uuuu
FSR2L PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
STATUS PIC18F2XJ13 PIC18F4XJ13 ---x xxxx ---u uuuu ---u uuuu
TMR0H PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
TMR0L PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
T0CON PIC18F2XJ13 PIC18F4XJ13 1111 1111 1111 1111 uuuu uuuu
OSCCON PIC18F2XJ13 PIC18F4XJ13 0110 q100 0110 q100 0110 q1uu
CM1CON PIC18F2XJ13 PIC18F4XJ13 0001 1111 0001 1111 uuuu uuuu
CM2CON PIC18F2XJ13 PIC18F4XJ13 0001 1111 0001 1111 uuuu uuuu
RCON(4) PIC18F2XJ13 PIC18F4XJ13 0-11 11qq 0-qq qquu u-qq qquu
TMR1H PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
TMR1L PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
T1CON PIC18F2XJ13 PIC18F4XJ13 0000 0000 uuuu uuuu uuuu uuuu
TMR2 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
PR2 PIC18F2XJ13 PIC18F4XJ13 1111 1111 1111 1111 uuuu uuuu
T2CON PIC18F2XJ13 PIC18F4XJ13 -000 0000 -000 0000 -uuu uuuu
SSP1BUF PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
SSP1ADD PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
SSP1MSK PIC18F2XJ13 PIC18F4XJ13 1111 1111 1111 1111 uuuu uuuu
SSP1STAT PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
SSP1CON1 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
SSP1CON2 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
ADRESH PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
ADRESL PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
ADCON0 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
ADCON1 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
WDTCON PIC18F2XJ13 PIC18F4XJ13 1qq0 q000 1qq0 0000 uqqu uuuu
TABLE 5-2: INITIALIZATION CONDITIONS FOR ALL REGISTERS (CONTINUED)
Register Applicable Devices
Power-on Reset,
Brown-out Reset,
Wake From Deep
Sleep
MCLR Rese ts
WDT Reset
RESET Instruction
Stack Resets
CM Resets
W ake-up via WDT
or Interrupt
Legend: u = unchanged, x = unknown, - = unimplemented bit, read as ‘0’, q = value depends on condition.
Note 1: When the wake-up is due to an interrupt and the GIEL or GIEH bit is set, the TOSU, TOSH and TOSL are
updated with the current value of the PC. The STKPTR is modified to point to the next location in the
hardware stack.
2: When the wake-up is due to an interrupt and the GIEL or GIEH bit is set, the PC is loaded with the interrupt
vector (0008h or 0018h).
3: One or more bits in the INTCONx or PIRx registers will be affected (to cause wake-up).
4: See Table 5-1 for the Reset value for a specific condition.
5: Not implemented on PIC18F2XJ13 devices.
6: Not implemented on “LF” devices.
2010 Microchip Technology Inc. Preliminary DS39974A-page 73
PIC18F47J13 FAMILY
PSTR1CON PIC18F2XJ13 PIC18F4XJ13 00-0 0001 00-0 0001 uu-u uuuu
ECCP1AS PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
ECCP1DEL PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
CCPR1H PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
CCPR1L PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
CCP1CON PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
PSTR2CON PIC18F2XJ13 PIC18F4XJ13 00-0 0001 00-0 0001 uu-u uuuu
ECCP2AS PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
ECCP2DEL PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
CCPR2H PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
CCPR2L PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
CCP2CON PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
CTMUCONH PIC18F2XJ13 PIC18F4XJ13 0-00 0000 0-00 0000 u-uu uuuu
CTMUCONL PIC18F2XJ13 PIC18F4XJ13 0000 00xx 0000 00xx uuuu uuuu
CTMUICON PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
SPBRG1 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
RCREG1 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
TXREG1 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
TXSTA1 PIC18F2XJ13 PIC18F4XJ13 0000 0010 0000 0010 uuuu uuuu
RCSTA1 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
SPBRG2 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
RCREG2 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
TXREG2 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
TXSTA2 PIC18F2XJ13 PIC18F4XJ13 0000 0010 0000 0010 uuuu uuuu
EECON2 PIC18F2XJ13 PIC18F4XJ13 ---- ---- ---- ---- ---- ----
EECON1 PIC18F2XJ13 PIC18F4XJ13 --00 x00- --00 q00- --00 u00-
IPR3 PIC18F2XJ13 PIC18F4XJ13 1111 1111 1111 1111 uuuu uuuu
PIR3 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu(3)
PIE3 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
IPR2 PIC18F2XJ13 PIC18F4XJ13 111- 1111 111- 1111 uuu- uuuu
PIR2 PIC18F2XJ13 PIC18F4XJ13 000- 0000 000- 0000 uuu- uuuu(3)
PIE2 PIC18F2XJ13 PIC18F4XJ13 000- 0000 000- 0000 uuu- uuuu
TABLE 5-2: INITIALIZATION CONDITIONS FOR ALL REGISTERS (CONTINUED)
Register Applicable Devices
Power-on Reset,
Brown-out Reset,
Wake From Deep
Sleep
MCLR Rese ts
WDT Reset
RESET Instruction
Stack Resets
CM Resets
W ake-up via WDT
or Interrupt
Legend: u = unchanged, x = unknown, - = unimplemented bit, read as ‘0’, q = value depends on condition.
Note 1: When the wake-up is due to an interrupt and the GIEL or GIEH bit is set, the TOSU, TOSH and TOSL are
updated with the current value of the PC. The STKPTR is modified to point to the next location in the
hardware stack.
2: When the wake-up is due to an interrupt and the GIEL or GIEH bit is set, the PC is loaded with the interrupt
vector (0008h or 0018h).
3: One or more bits in the INTCONx or PIRx registers will be affected (to cause wake-up).
4: See Table 5-1 for the Reset value for a specific condition.
5: Not implemented on PIC18F2XJ13 devices.
6: Not implemented on “LF” devices.
PIC18F47J13 FAMILY
DS39974A-page 74 Preliminary 2010 Microchip Technology Inc.
IPR1 PIC18F2XJ13 PIC18F4XJ13 1111 1111 1111 1111 uuuu uuuu
PIR1 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu(3)
PIE1 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
RCSTA2 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
OSCTUNE PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
T1GCON PIC18F2XJ13 PIC18F4XJ13 0000 0x00 0000 0x00 uuuu uxuu
T3GCON PIC18F2XJ13 PIC18F4XJ13 0000 0x00 uuuu uxuu uuuu uxuu
TRISE(5) — PIC18F4XJ13 00-- -111 00-- -111 uu-- -uuu
TRISD(5) — PIC18F4XJ13 1111 1111 1111 1111 uuuu uuuu
TRISC PIC18F2XJ13 PIC18F4XJ13 1111 1111 1111 1111 uuuu uuuu
TRISB PIC18F2XJ13 PIC18F4XJ13 1111 1111 1111 1111 uuuu uuuu
TRISA PIC18F2XJ13 PIC18F4XJ13 111- 1111 111- 1111 uuu- uuuu
PIE5 PIC18F2XJ13 PIC18F4XJ13 --00 0000 --00 0000 --uu uuuu
IPR4 PIC18F2XJ13 PIC18F4XJ13 1111 1111 1111 1111 uuuu uuuu
PIR4 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
PIE4 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
LATE(5) — PIC18F4XJ13 ---- -xxx ---- -uuu ---- -uuu
LATD(5) — PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
LATC PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
LATB PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
LATA PIC18F2XJ13 PIC18F4XJ13 xxx- xxxx uuu- uuuu uuu- uuuu
DMACON1 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
OSCCON2 PIC18F2XJ13 PIC18F4XJ13 -0-1 01-- -0-1 u1-- -u-u uu--
DMACON2 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
HLVDCON PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
PORTE(5) — PIC18F4XJ13 ---- -xxx ---- -uuu ---- -uuu
PORTD(5) — PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
PORTC PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
PORTB PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
PORTA PIC18F2XJ13 PIC18F4XJ13 xxx- xxxx uuu- uuuu uuu- uuuu
SPBRGH1 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
BAUDCON1 PIC18F2XJ13 PIC18F4XJ13 0100 0-00 0100 0-00 uuuu u-uu
TABLE 5-2: INITIALIZATION CONDITIONS FOR ALL REGISTERS (CONTINUED)
Register Applicable Devices
Power-on Reset,
Brown-out Reset,
Wake From Deep
Sleep
MCLR Rese ts
WDT Reset
RESET Instruction
Stack Resets
CM Resets
W ake-up via WDT
or Interrupt
Legend: u = unchanged, x = unknown, - = unimplemented bit, read as ‘0’, q = value depends on condition.
Note 1: When the wake-up is due to an interrupt and the GIEL or GIEH bit is set, the TOSU, TOSH and TOSL are
updated with the current value of the PC. The STKPTR is modified to point to the next location in the
hardware stack.
2: When the wake-up is due to an interrupt and the GIEL or GIEH bit is set, the PC is loaded with the interrupt
vector (0008h or 0018h).
3: One or more bits in the INTCONx or PIRx registers will be affected (to cause wake-up).
4: See Table 5-1 for the Reset value for a specific condition.
5: Not implemented on PIC18F2XJ13 devices.
6: Not implemented on “LF” devices.
2010 Microchip Technology Inc. Preliminary DS39974A-page 75
PIC18F47J13 FAMILY
SPBRGH2 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
BAUDCON2 PIC18F2XJ13 PIC18F4XJ13 0100 0-00 0100 0-00 uuuu u-uu
TMR3H PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
TMR3L PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
T3CON PIC18F2XJ13 PIC18F4XJ13 0000 0000 uuuu uuuu uuuu uuuu
TMR4 PIC18F2XJ13 PIC18F4XJ13 0000 0000 uuuu uuuu uuuu uuuu
PR4 PIC18F2XJ13 PIC18F4XJ13 1111 1111 1111 1111 uuuu uuuu
T4CON PIC18F2XJ13 PIC18F4XJ13 -000 0000 -000 0000 -uuu uuuu
SSP2BUF PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
SSP2ADD PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
SSP2MSK PIC18F2XJ13 PIC18F4XJ13 1111 1111 1111 1111 uuuu uuuu
SSP2STAT PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
SSP2CON1 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
SSP2CON2 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
CMSTAT PIC18F2XJ13 PIC18F4XJ13 ---- -111 ---- -111 ---- -uuu
PMADDRH(5) — PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
PMDOUT1H(5) — PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
PMADDRL — PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
PMDOUT1L — PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
PMDIN1H — PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
PMDIN1L — PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
TXADDRL PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
TXADDRH PIC18F2XJ13 PIC18F4XJ13 ---- 0000 ---- 0000 ---- uuuu
RXADDRL PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
RXADDRH PIC18F2XJ13 PIC18F4XJ13 ---- 0000 ---- 0000 ---- uuuu
DMABCL PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
DMABCH PIC18F2XJ13 PIC18F4XJ13 ---- --00 ---- --00 ---- --uu
PMCONH PIC18F2XJ13 PIC18F4XJ13 0--0 0000 0--0 0000 u--u uuuu
PMCONL — PIC18F4XJ13 000- 0000 000- 0000 uuu- uuuu
PMMODEH — PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
PMMODEL — PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
PMDOUT2H — PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
TABLE 5-2: INITIALIZATION CONDITIONS FOR ALL REGISTERS (CONTINUED)
Register Applicable Devices
Power-on Reset,
Brown-out Reset,
Wake From Deep
Sleep
MCLR Rese ts
WDT Reset
RESET Instruction
Stack Resets
CM Resets
W ake-up via WDT
or Interrupt
Legend: u = unchanged, x = unknown, - = unimplemented bit, read as ‘0’, q = value depends on condition.
Note 1: When the wake-up is due to an interrupt and the GIEL or GIEH bit is set, the TOSU, TOSH and TOSL are
updated with the current value of the PC. The STKPTR is modified to point to the next location in the
hardware stack.
2: When the wake-up is due to an interrupt and the GIEL or GIEH bit is set, the PC is loaded with the interrupt
vector (0008h or 0018h).
3: One or more bits in the INTCONx or PIRx registers will be affected (to cause wake-up).
4: See Table 5-1 for the Reset value for a specific condition.
5: Not implemented on PIC18F2XJ13 devices.
6: Not implemented on “LF” devices.
PIC18F47J13 FAMILY
DS39974A-page 76 Preliminary 2010 Microchip Technology Inc.
PMDOUT2L — PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
PMDIN2H — PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
PMDIN2L —PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
PMEH — PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
PMEL — PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
PMSTATH — PIC18F4XJ13 00-- 0000 00-- 0000 uu-- uuuu
PMSTATL — PIC18F4XJ13 10-- 1111 10-- 1111 uu-- uuuu
CVRCON PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
CCPTMRS0 PIC18F2XJ13 PIC18F4XJ13 0000 0000 uuuu uuuu uuuu uuuu
CCPTMRS1 PIC18F2XJ13 PIC18F4XJ13 00-0 -000 uu-u -uuu uu-u -uuu
CCPTMRS2 PIC18F2XJ13 PIC18F4XJ13 ---0 -000 ---u -uuu ---u -uuu
DSGPR1(6) PIC18F2XJ13 PIC18F4XJ13 uuuu uuuu uuuu uuuu uuuu uuuu
DSGPR0(6) PIC18F2XJ13 PIC18F4XJ13 uuuu uuuu uuuu uuuu uuuu uuuu
DSCONH(6) PIC18F2XJ13 PIC18F4XJ13 0--- -000 0--- -uuu u--- -uuu
DSCONL(6) PIC18F2XJ13 PIC18F4XJ13 ---- -000 ---- -u00 ---- -uuu
DSWAKEH(6) PIC18F2XJ13 PIC18F4XJ13 ---- ---0 ---- ---0 ---- ---u
DSWAKEL(6) PIC18F2XJ13 PIC18F4XJ13 0-00 00-1 0-00 00-0 u-uu uu-u
ANCON1 PIC18F2XJ13 PIC18F4XJ13 00-0 0000 00-0 0000 uu-u uuuu
ANCON0 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
ALRMCFG PIC18F2XJ13 PIC18F4XJ13 0000 0000 uuuu uuuu uuuu uuuu
ALRMRPT PIC18F2XJ13 PIC18F4XJ13 0000 0000 uuuu uuuu uuuu uuuu
ALRMVALH PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
ALRMVALL PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
ODCON1 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
ODCON2 PIC18F2XJ13 PIC18F4XJ13 ---- 0000 ---- 0000 ---- uuuu
ODCON3 PIC18F2XJ13 PIC18F4XJ13 0--- --00 0--- --00 u--- --uu
RTCCFG PIC18F2XJ13 PIC18F4XJ13 0-00 0000 u-uu uuuu u-uu uuuu
RTCCAL PIC18F2XJ13 PIC18F4XJ13 0000 0000 uuuu uuuu uuuu uuuu
REFOCON PIC18F2XJ13 PIC18F4XJ13 0-00 0000 0-00 0000 u-uu uuuu
PADCFG1 PIC18F2XJ13 PIC18F4XJ13 ---- -000 ---- -000 ---- -uuu
RTCVALH PIC18F2XJ13 PIC18F4XJ13 0xxx xxxx 0uuu uuuu 0uuu uuuu
RTCVALL PIC18F2XJ13 PIC18F4XJ13 0xxx xxxx 0uuu uuuu 0uuu uuuu
TABLE 5-2: INITIALIZATION CONDITIONS FOR ALL REGISTERS (CONTINUED)
Register Applicable Devices
Power-on Reset,
Brown-out Reset,
Wake From Deep
Sleep
MCLR Rese ts
WDT Reset
RESET Instruction
Stack Resets
CM Resets
W ake-up via WDT
or Interrupt
Legend: u = unchanged, x = unknown, - = unimplemented bit, read as ‘0’, q = value depends on condition.
Note 1: When the wake-up is due to an interrupt and the GIEL or GIEH bit is set, the TOSU, TOSH and TOSL are
updated with the current value of the PC. The STKPTR is modified to point to the next location in the
hardware stack.
2: When the wake-up is due to an interrupt and the GIEL or GIEH bit is set, the PC is loaded with the interrupt
vector (0008h or 0018h).
3: One or more bits in the INTCONx or PIRx registers will be affected (to cause wake-up).
4: See Table 5-1 for the Reset value for a specific condition.
5: Not implemented on PIC18F2XJ13 devices.
6: Not implemented on “LF” devices.
2010 Microchip Technology Inc. Preliminary DS39974A-page 77
PIC18F47J13 FAMILY
CM3CON PIC18F2XJ13 PIC18F4XJ13 0001 1111 0001 1111 uuuu uuuu
TMR5H PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
TMR5L PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
T5CON PIC18F2XJ13 PIC18F4XJ13 0000 0000 uuuu uuuu uuuu uuuu
T5GCON PIC18F2XJ13 PIC18F4XJ13 0000 0x00 uuuu uquu uuuu uquu
TMR6 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
PR6 PIC18F2XJ13 PIC18F4XJ13 1111 1111 1111 1111 uuuu uuuu
T6CON PIC18F2XJ13 PIC18F4XJ13 -000 0000 -000 0000 -uuu uuuu
TMR8 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
PR8 PIC18F2XJ13 PIC18F4XJ13 1111 1111 1111 1111 uuuu uuuu
T8CON PIC18F2XJ13 PIC18F4XJ13 -000 0000 -000 0000 -uuu uuuu
PSTR3CON PIC18F2XJ13 PIC18F4XJ13 00-0 0001 00-0 0001 uu-u uuuu
ECCP3AS PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
ECCP3DEL PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
CCPR3H PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
CCPR3L PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
CCP3CON PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
CCPR4H PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
CCPR4L PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
CCP4CON PIC18F2XJ13 PIC18F4XJ13 --00 0000 --00 0000 --uu uuuu
CCPR5H PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
CCPR5L PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
CCP5CON PIC18F2XJ13 PIC18F4XJ13 --00 0000 --00 0000 --uu uuuu
CCPR6H PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
CCPR6L PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
CCP6CON PIC18F2XJ13 PIC18F4XJ13 --00 0000 --00 0000 --uu uuuu
CCPR7H PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
CCPR7L PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
CCP7CON PIC18F2XJ13 PIC18F4XJ13 --00 0000 --00 0000 --00 0000
CCPR8H PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
CCPR8L PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
CCP8CON PIC18F2XJ13 PIC18F4XJ13 --00 0000 --00 0000 --uu uuuu
TABLE 5-2: INITIALIZATION CONDITIONS FOR ALL REGISTERS (CONTINUED)
Register Applicable Devices
Power-on Reset,
Brown-out Reset,
Wake From Deep
Sleep
MCLR Rese ts
WDT Reset
RESET Instruction
Stack Resets
CM Resets
W ake-up via WDT
or Interrupt
Legend: u = unchanged, x = unknown, - = unimplemented bit, read as ‘0’, q = value depends on condition.
Note 1: When the wake-up is due to an interrupt and the GIEL or GIEH bit is set, the TOSU, TOSH and TOSL are
updated with the current value of the PC. The STKPTR is modified to point to the next location in the
hardware stack.
2: When the wake-up is due to an interrupt and the GIEL or GIEH bit is set, the PC is loaded with the interrupt
vector (0008h or 0018h).
3: One or more bits in the INTCONx or PIRx registers will be affected (to cause wake-up).
4: See Table 5-1 for the Reset value for a specific condition.
5: Not implemented on PIC18F2XJ13 devices.
6: Not implemented on “LF” devices.
PIC18F47J13 FAMILY
DS39974A-page 78 Preliminary 2010 Microchip Technology Inc.
CCPR9H PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
CCPR9L PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
CCP9CON PIC18F2XJ13 PIC18F4XJ13 --00 0000 --00 0000 --uu uuuu
CCPR10H PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
CCPR10L PIC18F2XJ13 PIC18F4XJ13 xxxx xxxx uuuu uuuu uuuu uuuu
CCP10CON PIC18F2XJ13 PIC18F4XJ13 --00 0000 --00 0000 --uu uuuu
RPINR24 PIC18F2XJ13 PIC18F4XJ13 ---1 1111 ---1 1111 ---u uuuu
RPINR23 PIC18F2XJ13 PIC18F4XJ13 ---1 1111 ---1 1111 ---u uuuu
RPINR22 PIC18F2XJ13 PIC18F4XJ13 ---1 1111 ---1 1111 ---u uuuu
RPINR21 PIC18F2XJ13 PIC18F4XJ13 ---1 1111 ---1 1111 ---u uuuu
RPINR17 PIC18F2XJ13 PIC18F4XJ13 ---1 1111 ---1 1111 ---u uuuu
RPINR16 PIC18F2XJ13 PIC18F4XJ13 ---1 1111 ---1 1111 ---u uuuu
RPINR14 PIC18F2XJ13 PIC18F4XJ13 ---1 1111 ---1 1111 ---u uuuu
RPINR13 PIC18F2XJ13 PIC18F4XJ13 ---1 1111 ---1 1111 ---u uuuu
RPINR12 PIC18F2XJ13 PIC18F4XJ13 ---1 1111 ---1 1111 ---u uuuu
RPINR9 PIC18F2XJ13 PIC18F4XJ13 ---1 1111 ---1 1111 ---u uuuu
RPINR8 PIC18F2XJ13 PIC18F4XJ13 ---1 1111 ---1 1111 ---u uuuu
RPINR7 PIC18F2XJ13 PIC18F4XJ13 ---1 1111 ---1 1111 ---u uuuu
RPINR15 PIC18F2XJ13 PIC18F4XJ13 ---1 1111 ---1 1111 ---u uuuu
RPINR6 PIC18F2XJ13 PIC18F4XJ13 ---1 1111 ---1 1111 ---u uuuu
RPINR4 PIC18F2XJ13 PIC18F4XJ13 ---1 1111 ---1 1111 ---u uuuu
RPINR3 PIC18F2XJ13 PIC18F4XJ13 ---1 1111 ---1 1111 ---u uuuu
RPINR2 PIC18F2XJ13 PIC18F4XJ13 ---1 1111 ---1 1111 ---u uuuu
RPINR1 PIC18F2XJ13 PIC18F4XJ13 ---1 1111 ---1 1111 ---u uuuu
RPOR24 — PIC18F4XJ13 ---0 0000 ---0 0000 ---u uuuu
RPOR23 — PIC18F4XJ13 ---0 0000 ---0 0000 ---u uuuu
RPOR22 — PIC18F4XJ13 ---0 0000 ---0 0000 ---u uuuu
RPOR21 — PIC18F4XJ13 ---0 0000 ---0 0000 ---u uuuu
RPOR20 — PIC18F4XJ13 ---0 0000 ---0 0000 ---u uuuu
RPOR19 — PIC18F4XJ13 ---0 0000 ---0 0000 ---u uuuu
RPOR18 PIC18F2XJ13 PIC18F4XJ13 ---0 0000 ---0 0000 ---u uuuu
RPOR17 PIC18F2XJ13 PIC18F4XJ13 ---0 0000 ---0 0000 ---u uuuu
TABLE 5-2: INITIALIZATION CONDITIONS FOR ALL REGISTERS (CONTINUED)
Register Applicable Devices
Power-on Reset,
Brown-out Reset,
Wake From Deep
Sleep
MCLR Rese ts
WDT Reset
RESET Instruction
Stack Resets
CM Resets
W ake-up via WDT
or Interrupt
Legend: u = unchanged, x = unknown, - = unimplemented bit, read as ‘0’, q = value depends on condition.
Note 1: When the wake-up is due to an interrupt and the GIEL or GIEH bit is set, the TOSU, TOSH and TOSL are
updated with the current value of the PC. The STKPTR is modified to point to the next location in the
hardware stack.
2: When the wake-up is due to an interrupt and the GIEL or GIEH bit is set, the PC is loaded with the interrupt
vector (0008h or 0018h).
3: One or more bits in the INTCONx or PIRx registers will be affected (to cause wake-up).
4: See Table 5-1 for the Reset value for a specific condition.
5: Not implemented on PIC18F2XJ13 devices.
6: Not implemented on “LF” devices.
2010 Microchip Technology Inc. Preliminary DS39974A-page 79
PIC18F47J13 FAMILY
RPOR16 PIC18F2XJ13 PIC18F4XJ13 ---0 0000 ---0 0000 ---u uuuu
RPOR15 PIC18F2XJ13 PIC18F4XJ13 ---0 0000 ---0 0000 ---u uuuu
RPOR14 PIC18F2XJ13 PIC18F4XJ13 ---0 0000 ---0 0000 ---u uuuu
RPOR13 PIC18F2XJ13 PIC18F4XJ13 ---0 0000 ---0 0000 ---u uuuu
RPOR12 PIC18F2XJ13 PIC18F4XJ13 ---0 0000 ---0 0000 ---u uuuu
RPOR11 PIC18F2XJ13 PIC18F4XJ13 ---0 0000 ---0 0000 ---u uuuu
RPOR10 PIC18F2XJ13 PIC18F4XJ13 ---0 0000 ---0 0000 ---u uuuu
RPOR9 PIC18F2XJ13 PIC18F4XJ13 ---0 0000 ---0 0000 ---u uuuu
RPOR8 PIC18F2XJ13 PIC18F4XJ13 ---0 0000 ---0 0000 ---u uuuu
RPOR7 PIC18F2XJ13 PIC18F4XJ13 ---0 0000 ---0 0000 ---u uuuu
RPOR6 PIC18F2XJ13 PIC18F4XJ13 ---0 0000 ---0 0000 ---u uuuu
RPOR5 PIC18F2XJ13 PIC18F4XJ13 ---0 0000 ---0 0000 ---u uuuu
RPOR4 PIC18F2XJ13 PIC18F4XJ13 ---0 0000 ---0 0000 ---u uuuu
RPOR3 PIC18F2XJ13 PIC18F4XJ13 ---0 0000 ---0 0000 ---u uuuu
RPOR2 PIC18F2XJ13 PIC18F4XJ13 ---0 0000 ---0 0000 ---u uuuu
RPOR1 PIC18F2XJ13 PIC18F4XJ13 ---0 0000 ---0 0000 ---u uuuu
RPOR0 PIC18F2XJ13 PIC18F4XJ13 ---0 0000 ---0 0000 ---u uuuu
PPSCON PIC18F2XJ13 PIC18F4XJ13 ---- ---0 ---- ---0 ---- ---u
PMDIS3 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
PMDIS2 PIC18F2XJ13 PIC18F4XJ13 -0-0 0000 -0-0 0000 -u-u uuuu
PMDIS1 PIC18F2XJ13 PIC18F4XJ13 0000 000- 0000 000- uuuu uuu-
PMDIS0 PIC18F2XJ13 PIC18F4XJ13 0000 0000 0000 0000 uuuu uuuu
ADCTRIG PIC18F2XJ13 PIC18F4XJ13 ---- --00 ---- --00 ---- --uu
TABLE 5-2: INITIALIZATION CONDITIONS FOR ALL REGISTERS (CONTINUED)
Register Applicable Devices
Power-on Reset,
Brown-out Reset,
Wake From Deep
Sleep
MCLR Rese ts
WDT Reset
RESET Instruction
Stack Resets
CM Resets
W ake-up via WDT
or Interrupt
Legend: u = unchanged, x = unknown, - = unimplemented bit, read as ‘0’, q = value depends on condition.
Note 1: When the wake-up is due to an interrupt and the GIEL or GIEH bit is set, the TOSU, TOSH and TOSL are
updated with the current value of the PC. The STKPTR is modified to point to the next location in the
hardware stack.
2: When the wake-up is due to an interrupt and the GIEL or GIEH bit is set, the PC is loaded with the interrupt
vector (0008h or 0018h).
3: One or more bits in the INTCONx or PIRx registers will be affected (to cause wake-up).
4: See Table 5-1 for the Reset value for a specific condition.
5: Not implemented on PIC18F2XJ13 devices.
6: Not implemented on “LF” devices.
PIC18F47J13 FAMILY
DS39974A-page 80 Preliminary 2010 Microchip Technology Inc.
NOTES:
2010 Microchip Technology Inc. Preliminary DS39974A-page 81
PIC18F47J13 FAMILY
6.0 MEMORY ORGANIZATION
There are two types of memory in PIC18 Flash
microcontrollers:
• Program Memory
• Data RAM
As Harvard architecture devices, the data and program
memories use separate busses; this allows for
concurrent access of the two memory spaces.
Section 7.0 “Flash Program Memory” provides
additional information on the operation of the Flash
program memory.
6.1 Program Memory Organization
PIC18 microcontrollers implement a 21-bit program
counter, which is capable of addressing a 2-Mbyte
program memory space. Accessing a location between
the upper boundary of the physically implemented
memory and the 2-Mbyte address returns all ‘0’s (a
NOP instruction).
The PIC18F47J13 family offers a range of on-chip
Flash program memory sizes, from 64 Kbytes (up to
32,768 single-word instructions) to 128 Kbytes
(65,536 single-word instructions).
Figure 6-1 provides the program memory maps for
individual family devices.
FIGURE 6- 1 : MEMORY MA PS FOR PIC 18F47 J1 3 F A MILY DE VIC ES
Note: Sizes of memory areas are not to scale. Sizes of program memory areas are enhanced to show detail.
Unimplemented
Read as ‘0’
Unimplemented
Read as ‘0’
000000h
1FFFFFF
00FFFFh
01FFFFh
PC<20:0>
Stack Level 1
Stack Level 31
CALL, CALLW, RCALL,
RETURN, RETFIE, RETLW,
21
User Memory Space
On-Chip
Memory
On-Chip
Memory
ADDULNK, SUBULNK
Config. Words
Config. Words
PIC18FX6J13 PIC18FX7J13
PIC18F47J13 FAMILY
DS39974A-page 82 Preliminary 2010 Microchip Technology Inc.
6.1.1 HARD MEMORY VECTORS
All PIC18 devices have a total of three hard-coded
return vectors in their program memory space. The
Reset vector address is the default value to which the
program counter returns on all device Resets; it is
located at 0000h.
PIC18 devices also have two interrupt vector
addresses for handling high-priority and low-priority
interrupts. The high-priority interrupt vector is located at
0008h and the low-priority interrupt vector at 0018h.
Figure 6-2 provides their locations in relation to the
program memory map.
FIGU RE 6-2: HARD VECTOR AND
CONFIGURATION WORD
LOCATIONS FOR
PIC18F 47 J13 FAM ILY
DEVICES
6.1.2 FLASH CONFIGURATION WORDS
Because PIC18F47J13 family devices do not have
persistent configuration memory, the top four words of
on-chip program memory are reserved for configuration
information. On Reset, the configuration information is
copied into the Configuration registers.
The Configuration Words are stored in their program
memory location in numerical order, starting with the
lower byte of CONFIG1 at the lowest address and
ending with the upper byte of CONFIG4.
Table 6-1 provides the actual addresses of the Flash
Configuration Word for devices in the PIC18F47J13
family. Figure 6-2 displays their location in the memory
map with other memory vectors.
Additional details on the device Configuration Words
are provided in Section 27.1 “Configuration Bits”.
TABLE 6-1: FLASH CONFIGURATION
WORD FOR PIC18F47J13
FAMILY DEVICES
Reset Vector
Low-Priority Interrupt Vector
0000h
0018h
On-Chip
Program Memory
High-Priority Interrupt Vector 0008h
1FFFFFh
(Top of Memory)
(Top of Memory-7)
Flash Configuration Words
Read as ‘0’
Legend: (Top of Memory) represents upper boundary
of on-chip program memory space (see
Figure 6-1 for device-specific values).
Shaded area represents unimplemented
memory. Areas are not shown to scale.
Device Program
Memory
(Kbytes)
Configuration
Word Addresses
PIC18F26J13 64 FFF8h to FFFFh
PIC18F46J13
PIC18F27J13 128 1FFF8h to 1FFFFh
PIC18F47J13
2010 Microchip Technology Inc. Preliminary DS39974A-page 83
PIC18F47J13 FAMILY
6.1.3 PROGRAM COUNTER
The Program Counter (PC) specifies the address of the
instruction to fetch for execution. The PC is 21 bits wide
and is contained in three separate 8-bit registers. The
low byte, known as the PCL register, is both readable
and writable. The high byte, or PCH register, contains
the PC<15:8> bits; it is not directly readable or writable.
Updates to the PCH register are performed through the
PCLATH register. The upper byte is called PCU. This
register contains the PC<20:16> bits; it is also not
directly readable or writable. Updates to the PCU
register are performed through the PCLATU register.
The contents of PCLATH and PCLATU are transferred
to the program counter by any operation that writes to
PCL. Similarly, the upper 2 bytes of the program
counter are transferred to PCLATH and PCLATU by an
operation that reads PCL. This is useful for computed
offsets to the PC (see Section 6.1.6.1 “Computed
GOTO”).
The PC addresses bytes in the program memory. To
prevent the PC from becoming misaligned with word
instructions, the Least Significant bit (LSb) of PCL is
fixed to a value of ‘0’. The PC increments by two to
address sequential instructions in the program
memory.
The CALL, RCALL, GOTO and program branch
instructions write to the program counter directly. For
these instructions, the contents of PCLATH and
PCLATU are not transferred to the program counter.
6.1.4 RETURN ADDRESS STACK
The return address stack allows any combination of up
to 31 program calls and interrupts to occur. The PC is
pushed onto the stack when a CALL or RCALL instruc-
tion is executed, or an interrupt is Acknowledged. The
PC value is pulled off the stack on a RETURN, RETLW
or a RETFIE instruction (and on ADDULNK and
SUBULNK instructions if the extended instruction set is
enabled). PCLATU and PCLATH are not affected by
any of the RETURN or CALL instructions.
The stack operates as a 31-word by 21-bit RAM and a
5-bit Stack Pointer (SP), STKPTR. The stack space is
not part of either program or data space. The Stack
Pointer is readable and writable and the address on the
top of the stack is readable and writable through the
Top-of-Stack Special Function Registers (SFRs). Data
can also be pushed to, or popped from, the stack using
these registers.
A CALL type instruction causes a push onto the stack.
The Stack Pointer is first incremented and the location
pointed to by the Stack Pointer is written with the
contents of the PC (already pointing to the instruction
following the CALL). A RETURN type instruction causes
a pop from the stack. The contents of the location
pointed to by the STKPTR are transferred to the PC
and then the Stack Pointer is decremented.
The Stack Pointer is initialized to ‘00000’ after all
Resets. There is no RAM associated with the location
corresponding to a Stack Pointer value of ‘00000’; this
is only a Reset value. Status bits indicate if the stack is
full, has overflowed or has underflowed.
6.1.4.1 Top-of-Stack Access
Only the top of the return address stack (TOS) is
readable and writable. A set of three registers,
TOSU:TOSH:TOSL, holds the contents of the stack
location pointed to by the STKPTR register (Figure 6-3).
This allows users to implement a software stack if
necessary. After a CALL, RCALL or interrupt (and
ADDULNK and SUBULNK instructions if the extended
instruction set is enabled), the software can read the
pushed value by reading the TOSU:TOSH:TOSL
registers. These values can be placed on a user-defined
software stack. At return time, the software can return
these values to TOSU:TOSH:TOSL and do a return.
The user must disable the global interrupt enable bits
while accessing the stack to prevent inadvertent stack
corruption.
FI GURE 6-3: RETURN ADDRESS STAC K AND AS SOC IAT ED RE GIS TER S
00011
001A34h
11111
11110
11101
00010
00001
00000
00010
Return Address Stack<20:0>
Top-of-Stack
000D58h
TOSLTOSHTOSU
34h1Ah00h
STKPTR<4:0>
Top-of-Stack Registers Stack Pointer
PIC18F47J13 FAMILY
DS39974A-page 84 Preliminary 2010 Microchip Technology Inc.
6.1.4.2 Return Stack Pointer (STKPTR)
The STKPTR register (Register 6-1) contains the Stack
Pointer value, the STKFUL (Stack Full) and the STKUNF
(Stack Underflow) status bits. The value of the Stack
Pointer can be 0 through 31. The Stack Pointer
increments before values are pushed onto the stack and
decrements after values are popped off of the stack. On
Reset, the Stack Pointer value will be zero. The user
may read and write the Stack Pointer value. This feature
can be used by a Real-Time Operating System (RTOS)
for return stack maintenance.
After the PC is pushed onto the stack 31 times (without
popping any values off the stack), the STKFUL bit is
set. The STKFUL bit is cleared by software or by a
Power-on Reset (POR).
The action that takes place when the stack becomes
full depends on the state of the Stack Overflow Reset
Enable (STVREN) Configuration bit.
Refer to Section 27.1 “Configuration Bits” for the
device Configuration bits’ description.
If STVREN is set (default), the 31st push will push the
(PC + 2) value onto the stack, set the STKFUL bit and
reset the device. The STKFUL bit will remain set and
the Stack Pointer will be set to zero.
If STVREN is cleared, the STKFUL bit will be set on the
31st push and the Stack Pointer will increment to 31.
Any additional pushes will not overwrite the 31st push
and the STKPTR will remain at 31.
When the stack has been popped enough times to
unload the stack, the next pop will return zero to the PC
and set the STKUNF bit, while the Stack Pointer
remains at zero. The STKUNF bit will remain set until
cleared by software or until a POR occurs.
6.1.4.3 PUSH and POP Instructions
Since the Top-of-Stack (TOS) is readable and writable,
the ability to push values onto the stack and pull values
off of the stack, without disturbing normal program exe-
cution, is necessary. The PIC18 instruction set includes
two instructions, PUSH and POP, that permit the TOS to
be manipulated under software control. TOSU, TOSH
and TOSL can be modified to place data or a return
address on the stack.
The PUSH instruction places the current PC value onto
the stack. This increments the Stack Pointer and loads
the current PC value onto the stack.
The POP instruction discards the current TOS by
decrementing the Stack Pointer. The previous value
pushed onto the stack then becomes the TOS value.
Note: Returning a value of zero to the PC on an
underflow has the effect of vectoring the
program to the Reset vector, where the
stack conditions can be verified and
appropriate actions can be taken. This is
not the same as a Reset, as the contents
of the SFRs are not affected.
REGISTER 6-1: STKPTR: STACK POINTER REGISTER (ACCESS FFCh)
R/C-0 R/C-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
STKFUL(1) STKUNF(1) — SP4 SP3 SP2 SP1 SP0
bit 7 bit 0
Legend: C = Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 STKFUL: Stack Full Flag bit(1)
1 = Stack became full or overflowed
0 = Stack has not become full or overflowed
bit 6 STKUNF: Stack Underflow Flag bit(1)
1 = Stack underflow occurred
0 = Stack underflow did not occur
bit 5 Unimplemented: Read as ‘0’
bit 4-0 SP<4:0>: Stack Pointer Location bits
Note 1: Bits 7 and 6 are cleared by user software or by a POR.
2010 Microchip Technology Inc. Preliminary DS39974A-page 85
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6.1.4.4 Stack Full and Underflow Resets
Device Resets on stack overflow and stack underflow
conditions are enabled by setting the STVREN bit in
Configuration Register 1L. When STVREN is set, a full
or underflow condition sets the appropriate STKFUL or
STKUNF bit and then causes a device Reset. When
STVREN is cleared, a full or underflow condition sets
the appropriate STKFUL or STKUNF bit, but does not
cause a device Reset. The STKFUL or STKUNF bits
are cleared by the user software or a POR.
6.1.5 FAST REGISTER STACK (FRS)
A Fast Register Stack (FRS) is provided for the
STATUS, WREG and BSR registers to provide a “fast
return” option for interrupts. This stack is only one level
deep and is neither readable nor writable. It is loaded
with the current value of the corresponding register
when the processor vectors for an interrupt. All inter-
rupt sources push values into the Stack registers. The
values in the registers are then loaded back into the
working registers if the RETFIE, FAST instruction is
used to return from the interrupt.
If both low-priority and high-priority interrupts are
enabled, the Stack registers cannot be used reliably to
return from low-priority interrupts. If a high-priority
interrupt occurs while servicing a low-priority interrupt,
the Stack register values stored by the low-priority
interrupt will be overwritten. In these cases, users must
save the key registers in software during a low-priority
interrupt.
If interrupt priority is not used, all interrupts may use the
FRS for returns from interrupt. If no interrupts are used,
the FRS can be used to restore the STATUS, WREG
and BSR registers at the end of a subroutine call. To
use the Fast Register Stack for a subroutine call, a
CALL label, FAST instruction must be executed to
save the STATUS, WREG and BSR registers to the
Fast Register Stack. A RETURN,FAST instruction is
then executed to restore these registers from the FRS.
Example 6-1 provides a source code example that
uses the FRS during a subroutine call and return.
EXAMPLE 6-1: FAST REGISTER STACK
CODE EXAMPLE
6.1.6 LOOK-UP TABLES IN PROGRAM
MEMORY
There may be programming situations that require the
creation of data structures or look-up tables in program
memory. For PIC18 devices, look-up tables can be
implemented in two ways:
• Computed GOTO
• Table Reads
6.1.6.1 Computed GOTO
A computed GOTO is accomplished by adding an offset
to the PC. An example is shown in Example 6-2.
A look-up table can be formed with an ADDWF PCL
instruction and a group of RETLW nn instructions. The
W register is loaded with an offset into the table before
executing a call to that table. The first instruction of the
called routine is the ADDWF PCL instruction. The next
executed instruction will be one of the RETLW nn
instructions that returns the value, ‘nn’, to the calling
function.
The offset value (in WREG) specifies the number of
bytes that the PC should advance and should be
multiples of 2 (LSb = 0).
In this method, only one byte may be stored in each
instruction location, but room on the return address
stack is required.
EXAMPLE 6-2: COMPUTED GOTO USING
AN OFFSET V ALUE
6.1.6.2 Table Reads
A better method of storing data in program memory
allows two bytes to be stored in each instruction
location.
Look-up table data may be stored two bytes per
program word while programming. The Table Pointer
(TBLPTR) specifies the byte address and the Table
Latch (TABLAT) contains the data that is read from the
program memory. Data is transferred from program
memory, one byte at a time.
Table read operation is discussed further in
Section 7.1 “Table Reads and Table Writes”.
CALL SUB1, FAST ;STATUS, WREG, BSR
;SAVED IN FAST REGISTER
;STACK
·
·
SUB1 ·
·
RETURN FAST ;RESTORE VALUES SAVED
;IN FAST REGISTER STACK
MOVF OFFSET, W
CALL TABLE
ORG nn00h
TABLE ADDWF PCL
RETLW nnh
RETLW nnh
RETLW nnh
.
.
.
PIC18F47J13 FAMILY
DS39974A-page 86 Preliminary 2010 Microchip Technology Inc.
6.2 PIC18 Instruction Cycle
6.2.1 CLOCKING SCHEME
The microcontroller clock input, whether from an
internal or external source, is internally divided by four
to generate four non-overlapping quadrature clocks
(Q1, Q2, Q3 and Q4). Internally, the PC is incremented
on every Q1; the instruction is fetched from the
program memory and latched into the Instruction
Register (IR) during Q4. The instruction is decoded and
executed during the following Q1 through Q4.
Figure 6-4 illustrates the clocks and instruction
execution flow.
6.2.2 INSTRUCTION FLOW/PIPELINING
An “Instruction Cycle” consists of four Q cycles, Q1
through Q4. The instruction fetch and execute are pipe-
lined in such a manner that a fetch takes one instruction
cycle, while the decode and execute take another
instruction cycle. However, due to the pipelining, each
instruction effectively executes in one cycle. If an
instruction causes the PC to change (e.g., GOTO), then
two cycles are required to complete the instruction
(Example 6-3).
A fetch cycle begins with the PC incrementing in Q1.
In the execution cycle, the fetched instruction is latched
into the IR in cycle, Q1. This instruction is then decoded
and executed during the Q2, Q3 and Q4 cycles. Data
memory is read during Q2 (operand read) and written
during Q4 (destination write).
FIGU RE 6-4: CLOCK/INST RU CTIO N C YC LE
EXAMPLE 6-3: INSTRUCTION PIPELINE FLOW
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
OSC1
Q1
Q2
Q3
Q4
PC
OSC2/CLKO
(RC mode)
PC PC + 2 PC + 4
Fetch INST (PC)
Execute INST (PC – 2)
Fetch INST (PC + 2)
Execute INST (PC)
Fetch INST (PC + 4)
Execute INST (PC + 2)
Internal
Phase
Clock
Note: All instructions are single-cycle, except for any program branches. These take two cycles since the fetch instruction
is “flushed” from the pipeline while the new instruction is being fetched and then executed.
TCY0TCY1TCY2TCY3TCY4TCY5
1. MOVLW 55h Fetch 1 Execute 1
2. MOVWF LATB Fetch 2 Execute 2
3. BRA SUB_1 Fetch 3 Execute 3
4. BSF LATA, BIT3 (Forced NOP) Fetch 4 Flush (NOP)
5. Instruction @ address SUB_1 Fetch SUB_1 Execute SUB_1
2010 Microchip Technology Inc. Preliminary DS39974A-page 87
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6.2.3 INSTRUCTIONS IN PROGRAM
MEMORY
The program memory is addressed in bytes. Instruc-
tions are stored as 2 bytes or 4 bytes in program
memory. The Least Significant Byte (LSB) of an
instruction word is always stored in a program memory
location with an even address (LSB = 0). To maintain
alignment with instruction boundaries, the PC
increments in steps of 2 and the LSB will always read
‘0’ (see Section 6.1.3 “Program Counter”).
Figure 6-5 provides an example of how instruction
words are stored in the program memory.
The CALL and GOTO instructions have the absolute
program memory address embedded into the instruc-
tion. Since instructions are always stored on word
boundaries, the data contained in the instruction is a
word address. The word address is written to PC<20:1>,
which accesses the desired byte address in program
memory. Instruction #2 in Figure 6-5 displays how the
instruction, GOTO 0006h, is encoded in the program
memory. Program branch instructions, which encode a
relative address offset, operate in the same manner. The
offset value stored in a branch instruction represents the
number of single-word instructions that the PC will be
offset by. Section 28.0 “Instruction Set Summary”
provides further details of the instruction set.
FIGURE 6-5: INSTRUCTIONS IN PROGRAM MEMORY
6.2.4 TWO-WORD INSTRUCTIONS
The standard PIC18 instruction set has four, two-word
instructions: CALL, MOVFF, GOTO and LSFR. In all
cases, the second word of the instructions always has
‘1111’ as its four Most Significant bits (MSbs); the other
12 bits are literal data, usually a data memory address.
The use of ‘1111’ in the 4 MSbs of an instruction
specifies a special form of NOP. If the instruction is
executed in proper sequence immediately after the first
word, the data in the second word is accessed and
used by the instruction sequence. If the first word is
skipped for some reason, and the second word is
executed by itself, a NOP is executed instead. This is
necessary for cases when the two-word instruction is
preceded by a conditional instruction that changes the
PC. Example 6-4 illustrates how this works.
EXAMPLE 6-4: TWO-WORD INSTRUCTIONS
Word AddressLSB = 1LSB = 0
Program Memory
Byte Locations
000000h
000002h
000004h
000006h
Instruction 1: MOVLW 055h 0Fh 55h 000008h
Instruction 2: GOTO 0006h EFh 03h 00000Ah
F0h 00h 00000Ch
Instruction 3: MOVFF 123h, 456h C1h 23h 00000Eh
F4h 56h 000010h
000012h
000014h
Note: See Section 6.5 “Program Memory and
the Extended Instruction Set” for infor-
mation on two-word instructions in the
extended instruction set.
CASE 1:
Object Code Source Code
0110 0110 0000 0000 TSTFSZ REG1 ; is RAM location 0?
1100 0001 0010 0011 MOVFF REG1, REG2 ; No, skip this word
1111 0100 0101 0110 ; Execute this word as a NOP
0010 0100 0000 0000 ADDWF REG3 ; continue code
CASE 2:
Object Code Source Code
0110 0110 0000 0000 TSTFSZ REG1 ; is RAM location 0?
1100 0001 0010 0011 MOVFF REG1, REG2 ; Yes, execute this word
1111 0100 0101 0110 ; 2nd word of instruction
0010 0100 0000 0000 ADDWF REG3 ; continue code
PIC18F47J13 FAMILY
DS39974A-page 88 Preliminary 2010 Microchip Technology Inc.
6.3 Data Memory Organization
The data memory in PIC18 devices is implemented as
static RAM. Each register in the data memory has a
12-bit address, allowing up to 4096 bytes of data
memory. The memory space is divided into as many as
16 banks that contain 256 bytes each. The
PIC18F47J13 family implements all available banks
and provides 3.8 Kbytes of data memory available to
the user. Figure 6-6 provides the data memory
organization for the devices.
The data memory contains Special Function Registers
(SFRs) and General Purpose Registers (GPRs). The
SFRs are used for control and status of the controller
and peripheral functions, while GPRs are used for data
storage and scratchpad operations in the user’s
application. Any read of an unimplemented location will
read as ‘0’s.
The instruction set and architecture allow operations
across all banks. The entire data memory may be
accessed by Direct, Indirect or Indexed Addressing
modes. Addressing modes are discussed later in this
section.
To ensure that commonly used registers (select SFRs
and select GPRs) can be accessed in a single cycle,
PIC18 devices implement an Access Bank. This is a
256-byte memory space that provides fast access to
select SFRs and the lower portion of GPR Bank 0 with-
out using the BSR. Section 6.3.2 “Access Bank”
provides a detailed description of the Access RAM.
6.3.1 BANK SELECT REGISTER
Large areas of data memory require an efficient
addressing scheme to make rapid access to any
address possible. Ideally, this means that an entire
address does not need to be provided for each read or
write operation. For PIC18 devices, this is accom-
plished with a RAM banking scheme. This divides the
memory space into 16 contiguous banks of 256 bytes.
Depending on the instruction, each location can be
addressed directly by its full 12-bit address, or an 8-bit
low-order address and a 4-bit Bank Pointer.
Most instructions in the PIC18 instruction set make use
of the Bank Pointer, known as the Bank Select Register
(BSR). This SFR holds the 4 MSbs of a location’s
address; the instruction itself includes the 8 LSbs. Only
the four lower bits of the BSR are implemented
(BSR<3:0>). The upper four bits are unused; they will
always read ‘0’ and cannot be written to. The BSR can
be loaded directly by using the MOVLB instruction.
The value of the BSR indicates the bank in data
memory. The 8 bits in the instruction show the location
in the bank and can be thought of as an offset from the
bank’s lower boundary. The relationship between the
BSR’s value and the bank division in data memory is
illustrated in Figure 6-7.
Because up to 16 registers can share the same
low-order address, the user must always be careful to
ensure that the proper bank is selected before perform-
ing a data read or write. For example, writing what
should be program data to an 8-bit address of F9h,
while the BSR is 0Fh, will end up resetting the PC.
While any bank can be selected, only those banks that
are actually implemented can be read or written to.
Writes to unimplemented banks are ignored, while
reads from unimplemented banks will return ‘0’s. Even
so, the STATUS register will still be affected as if the
operation was successful. The data memory map in
Figure 6-6 indicates which banks are implemented.
In the core PIC18 instruction set, only the MOVFF
instruction fully specifies the 12-bit address of the
source and target registers. This instruction ignores the
BSR completely when it executes. All other instructions
include only the low-order address as an operand and
must use either the BSR or the Access Bank to locate
their target registers.
Note: The operation of some aspects of data
memory are changed when the PIC18
extended instruction set is enabled. See
Section 6.6 “Data Memory and the
Extended Instruction Set” for more
information.
2010 Microchip Technology Inc. Preliminary DS39974A-page 89
PIC18F47J13 FAMILY
FIGURE 6- 6 : DAT A M EMORY MA P FOR PI C1 8F 47 J13 FAM ILY DEVI CE S
Bank 0
Bank 1
Bank 14
Bank 15
BSR3:BSR0
= 0000
= 0001
= 1111
060h
05Fh
F5Fh
FFFh
00h
5Fh
60h
FFh
Access Bank
When a = 0:
The BSR is ignored and the
Access Bank is used.
The first 96 bytes are general
purpose RAM (from Bank 0).
The remaining 160 bytes are
Special Function Registers
(from Bank 15).
When a = 1:
The BSR specifies the bank
used by the instruction.
EAFh
F00h
EFFh
1FFh
100h
0FFh
000h
Access RAM
FFh
00h
FFh
00h
FFh
00h
GPR
GPR
Access RAM High
Access RAM Low
Bank 2
= 0010
(SFRs)
2FFh
200h
Bank 3
FFh
00h
GPR
FFh
= 0011
= 1101
GPR
GPR
GPR
GPR
GPR
GPR
GPR
GPR
GPR
GPR
4FFh
400h
5FFh
500h
3FFh
300h
FFh
00h
FFh
00h
FFh
00h
FFh
00h
FFh
00h
FFh
00h
FFh
00h
FFh
00h
FFh
00h
FFh
00h
FFh
00h
00h
GPR, BDT
GPR
= 0110
= 0111
= 1010
= 1100
= 1000
= 0101
= 1001
= 1011
= 0100 Bank 4
Bank 5
Bank 6
Bank 7
Bank 8
Bank 9
Bank 10
Bank 11
Bank 12
Bank 13
= 1110
6FFh
600h
7FFh
700h
8FFh
800h
9FFh
900h
AFFh
A00h
BFFh
B00h
CFFh
C00h
DFFh
D00h
E00h
Note 1: Addresses, EB0h through F5Fh, are not part of the Access Bank. Either the BANKED or the MOVFF
instruction should be used to access these SFRs.
C0h
60h
Access SFRs
Non-Access SFR(1)
Non-Access SFR(1)
EB0h
PIC18F47J13 FAMILY
DS39974A-page 90 Preliminary 2010 Microchip Technology Inc.
FIGURE 6-7: USE OF THE BANK SELEC T REGISTER (DIR ECT ADDRESSI NG)
6.3.2 ACCESS BANK
While the use of the BSR with an embedded 8-bit
address allows users to address the entire range of data
memory, it also means that the user must always ensure
that the correct bank is selected. Otherwise, data may
be read from, or written to, the wrong location. This can
be disastrous if a GPR is the intended target of an oper-
ation, but an SFR is written to instead. Verifying and/or
changing the BSR for each read or write to data memory
can become very inefficient.
To streamline access for the most commonly used data
memory locations, the data memory is configured with
an Access Bank, which allows users to access a
mapped block of memory without specifying a BSR.
The Access Bank consists of the first 96 bytes of
memory (00h-5Fh) in Bank 0 and the last 160 bytes of
memory (60h-FFh) in Bank 15. The lower half is known
as the Access RAM and is composed of GPRs. The
upper half is where the device’s SFRs are mapped.
These two areas are mapped contiguously in the
Access Bank and can be addressed in a linear fashion
by an 8-bit address (Figure 6-6).
The Access Bank is used by core PIC18 instructions
that include the Access RAM bit (the ‘a’ parameter in
the instruction). When ‘a’ is equal to ‘1’, the instruction
uses the BSR and the 8-bit address included in the
opcode for the data memory address. When ‘a’ is ‘0’,
however, the instruction is forced to use the Access
Bank address map; the current value of the BSR is
ignored entirely.
Using this “forced” addressing allows the instruction to
operate on a data address in a single cycle without
updating the BSR first. For 8-bit addresses of 60h and
above, this means that users can evaluate and operate
on SFRs more efficiently. The Access RAM below 60h
is a good place for data values that the user might need
to access rapidly, such as immediate computational
results or common program variables. Access RAM
also allows for faster and more code efficient context
saving and switching of variables.
The mapping of the Access Bank is slightly different
when the extended instruction set is enabled (XINST
Configuration bit = 1). This is discussed in more detail
in Section 6.6.3 “Mapping the Access Bank in
Indexed Literal Offset Mode”.
6.3.3 GENERAL PURPOSE
REGISTER FILE
PIC18 devices may have banked memory in the GPR
area. This is data RAM, which is available for use by all
instructions. GPRs start at the bottom of Bank 0
(address 000h) and grow upward toward the bottom of
the SFR area. GPRs are not initialized by a POR and
are unchanged on all other Resets.
Note 1: The Access RAM bit of the instruction can be used to force an override of the selected bank (BSR<3:0>) to
the registers of the Access Bank.
2: The MOVFF instruction embeds the entire 12-bit address in the instruction.
Data Memory
Bank Select(2)
70
From Opcode(2)
0000
000h
100h
200h
300h
F00h
E00h
FFFh
Bank 0
Bank 1
Bank 2
Bank 14
Bank 15
00h
FFh
00h
FFh
00h
FFh
00h
FFh
00h
FFh
00h
FFh
Bank 3
through
Bank 13
0010 11111 111
70
BSR(1)
11111111
2010 Microchip Technology Inc. Preliminary DS39974A-page 91
PIC18F47J13 FAMILY
6.3.4 SPECIAL FUNCTION REGISTERS
The SFRs are registers used by the CPU and periph-
eral modules for controlling the desired operation of the
device. These registers are implemented as static
RAM. SFRs start at the top of data memory (FFFh) and
extend downward to occupy more than the top half of
Bank 15 (F40h to FFFh). Table 6-2, Table 6-3 and
Table 6-4 provide a list of these registers.
The SFRs can be classified into two sets: those
associated with the “core” device functionality (ALU,
Resets and interrupts) and those related to the
peripheral functions. The Reset and Interrupt registers
are described in their corresponding chapters, while the
ALU’s STATUS register is described later in this section.
Registers related to the operation of the peripheral
features are described in the chapter for that peripheral.
The SFRs are typically distributed among the
peripherals whose functions they control. Unused SFR
locations are unimplemented and read as ‘0’s
Note: The SFRs located between EB0h and
F5Fh are not part of the Access Bank.
Either BANKED instructions (using BSR) or
the MOVFF instruction should be used to
access these locations. When program-
ming in MPLAB® C18, the compiler will
automatically use the appropriate
addressing mode.
TABLE 6-2: ACCESS BANK SPECIAL FUNCTION REGISTER MAP
Address Name Address Name Address Name Address Name Address Name
FFFh TOSU FDFh INDF2(1) FBFh PSTR1CON F9Fh IPR1 F7Fh SPBRGH1
FFEh TOSH FDEh POSTINC2(1) FBEh ECCP1AS F9Eh PIR1 F7Eh BAUDCON1
FFDh TOSL FDDh POSTDEC2(1) FBDh ECCP1DEL F9Dh PIE1 F7Dh SPBRGH2
FFCh STKPTR FDCh PREINC2(1) FBCh CCPR1H F9Ch RCSTA2 F7Ch BAUDCON2
FFBh PCLATU FDBh PLUSW2(1) FBBh CCPR1L F9Bh OSCTUNE F7Bh TMR3H
FFAh PCLATH FDAh FSR2H FBAh CCP1CON F9Ah T1GCON F7Ah TMR3L
FF9h PCL FD9h FSR2L FB9h PSTR2CON F99h IPR5 F79h T3CON
FF8h TBLPTRU FD8h STATUS FB8h ECCP2AS F98h PIR5 F78h TMR4
FF7h TBLPTRH FD7h TMR0H FB7h ECCP2DEL F97h T3GCON F77h PR4
FF6h TBLPTRL FD6h TMR0L FB6h CCPR2H F96h TRISE F76h T4CON
FF5h TABLAT FD5h T0CON FB5h CCPR2L F95h TRISD F75h SSP2BUF
FF4h PRODH FD4h —(5) FB4h CCP2CON F94h TRISC F74h SSP2ADD(3)
FF3h PRODL FD3h OSCCON FB3h CTMUCONH F93h TRISB F73h SSP2STAT
FF2h INTCON FD2h CM1CON FB2h CTMUCONL F92h TRISA F72h SSP2CON1
FF1h INTCON2 FD1h CM2CON FB1h CTMUICON F91h PIE5 F71h SSP2CON2
FF0h INTCON3 FD0h RCON FB0h SPBRG1 F90h IPR4 F70h CMSTAT
FEFh INDF0(1) FCFh TMR1H FAFh RCREG1 F8Fh PIR4 F6Fh PMADDRH(2,4)
FEEh POSTINC0(1) FCEh TMR1L FAEh TXREG1 F8Eh PIE4 F6Eh PMADDRL(2,4)
FEDh POSTDEC0(1) FCDh T1CON FADh TXSTA1 F8Dh LATE(2) F6Dh PMDIN1H(2)
FECh PREINC0(1) FCCh TMR2 FACh RCSTA1 F8Ch LATD(2) F6Ch PMDIN1L(2)
FEBh PLUSW0(1) FCBh PR2 FABh SPBRG2 F8Bh LATC F6Bh TXADDRL
FEAh FSR0H FCAh T2CON FAAh RCREG2 F8Ah LATB F6Ah TXADDRH
FE9h FSR0L FC9h SSP1BUF FA9h TXREG2 F89h LATA F69h RXADDRL
FE8h WREG FC8h SSP1ADD(3) FA8h TXSTA2 F88h DMACON1 F68h RXADDRH
FE7h INDF1(1) FC7h SSP1STAT FA7h EECON2 F87h OSCCON2(5) F67h DMABCL
FE6h POSTINC1(1) FC6h SSP1CON1 FA6h EECON1 F86h DMACON2 F66h DMABCH
FE5h POSTDEC1(1) FC5h SSP1CON2 FA5h IPR3 F85h HLVDCON F65h —
FE4h PREINC1(1) FC4h ADRESH FA4h PIR3 F84h PORTE(2) F64h —
FE3h PLUSW1(1) FC3h ADRESL FA3h PIE3 F83h PORTD(2) F63h —
FE2h FSR1H FC2h ADCON0 FA2h IPR2 F82h PORTC F62h —
FE1h FSR1L FC1h ADCON1 FA1h PIR2 F81h PORTB F61h —
FE0h BSR FC0h WDTCON FA0h PIE2 F80h PORTA F60h —
Note 1: This is not a physical register.
2: This register is not available on 28-pin devices.
3: SSPxADD and SSPxMSK share the same address.
4: PMADDRH and PMDOUTH share the same address, and PMADDRL and PMDOUTL share the same address.
PMADDRx is used in Master modes and PMDOUTx is used in Slave modes.
5: Reserved; do not write to this location.
PIC18F47J13 FAMILY
DS39974A-page 92 Preliminary 2010 Microchip Technology Inc.
TABLE 6-3: NON-ACCESS BANK SPECIAL FUNCTION REGISTER MAP
Address Name Address Name Address Name Address Name Address Name Address Name
F5Fh PMCONH F3Fh RTCCFG F1Fh PR6 EFFh RPINR24 EDFh — EBFh PPSCON
F5Eh PMCONL F3Eh RTCCAL F1Eh T6CON EFEh RPINR23 EDEh — EBEh —
F5Dh PMMODEH F3Dh REFOCON F1Dh TMR8 EFDh RPINR22 EDDh — EBDh —
F5Ch PMMODEL F3Ch PADCFG1 F1Ch PR8 EFCh RPINR21 EDCh — EBCh PMDIS3
F5Bh PMDOUT2H F3Bh RTCVALH F1Bh T8CON EFBh —EDBh— EBBh PMDIS2
F5Ah PMDOUT2L F3Ah RTCVALL F1Ah PSTR3CON EFAh —EDAh— EBAh PMDIS1
F59h PMDIN2H F39h — F19h ECCP3AS EF9h —ED9h— EB9h PMDIS0
F58h PMDIN2L F38h — F18h ECCP3DEL EF8h RPINR17 ED8h RPOR24 EB8h ADCTRIG
F57h PMEH F37h — F17h CCPR3H EF7h RPINR16 ED7h RPOR23 EB7h —
F56h PMEL F36h —F16hCCPR3LEF6h— ED6h RPOR22 EB6h —
F55h PMSTATH F35h — F15h CCP3CON EF5h — ED5h RPOR21 EB5h —
F54h PMSTATL F34h — F14h CCPR4H EF4h RPINR14 ED4h RPOR20 EB4h —
F53h CVRCON F33h — F13h CCPR4L EF3h RPINR13 ED3h RPOR19 EB3h —
F52h CCPTMRS0 F32h — F12h CCP4CON EF2h RPINR12 ED2h RPOR18 EB2h —
F51h CCPTMRS1 F31h — F11h CCPR5H EF1h — ED1h RPOR17 EB1h —
F50h CCPTMRS2 F30h —F10hCCPR5LEF0h— ED0h RPOR16 EB0h —
F4Fh DSGPR1 F2Fh — F0Fh CCP5CON EEFh —ECFhRPOR15
F4Eh DSGPR0 F2Eh — F0Eh CCPR6H EEEh — ECEh RPOR14
F4Dh DSCONH F2Dh —F0DhCCPR6LEEDh— ECDh RPOR13
F4Ch DSCONL F2Ch — F0Ch CCP6CON EECh — ECCh RPOR12
F4Bh DSWAKEH F2Bh — F0Bh CCPR7H EEBh — ECBh RPOR11
F4Ah DSWAKEL F2Ah — F0Ah CCPR7L EEAh RPINR9 ECAh RPOR10
F49h ANCON1 F29h — F09h CCP7CON EE9h RPINR8 EC9h RPOR9
F48h ANCON0 F28h — F08h CCPR8H EE8h RPINR7 EC8h RPOR8
F47h ALRMCFG F27h — F07h CCPR8L EE7h RPINR15 EC7h RPOR7
F46h ALRMRPT F26h — F06h CCP8CON EE6h RPINR6 EC6h RPOR6
F45h ALRMVALH F25h CM3CON F05h CCPR9H EE5h — EC5h RPOR5
F44h ALRMVALL F24h TMR5H F04h CCPR9L EE4h RPINR4 EC4h RPOR4
F43h — F23h TMR5L F03h CCP9CON EE3h RPINR3 EC3h RPOR3
F42h ODCON1 F22h T5CON F02h CCPR10H EE2h RPINR2 EC2h RPOR2
F41h ODCON2 F21h T5GCON F01h CCPR10L EE1h RPINR1 EC1h RPOR1
F40h ODCON3 F20h TMR6 F00h CCP10CON EE0h — EC0h RPOR0
2010 Microchip Technology Inc. Preliminary DS39974A-page 93
PIC18F47J13 FAMILY
6.3.4.1 Context Defined SFRs
There are several registers that share the same
address in the SFR space. The register's definition and
usage depends on the operating mode of its associated
peripheral. These registers are:
• SSPxADD and SSPxMSK: These are two
separate hardware registers, accessed through a
single SFR address. The operating mode of the
MSSP modules determines which register is
being accessed. See Section 20.5.3.4 “7-Bit
Address Masking Mode” for additional details.
• PMADDRH/L and PMDOUT2H/L: In this case,
these named buffer pairs are actually the same
physical registers. The Parallel Master Port (PMP)
module’s operating mode determines what func-
tion the registers take on. See Section 11.1.2
“Data Registers” for additional details.
TABLE 6-4: REGISTER FILE SUMMARY (PIC18F47J13 FAMILY)
Addr. File Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Valu e on
POR, BOR
FFFh TOSU — — — Top-of-Stack Upper Byte (TOS<20:16>) ---0 0000
FFEh TOSH Top-of-Stack High Byte (TOS<15:8>) 0000 0000
FFDh TOSL Top-of-Stack Low Byte (TOS<7:0>) 0000 0000
FFCh STKPTR STKFUL STKUNF — SP4 SP3 SP2 SP1 SP0 00-0 0000
FFBh PCLATU — — — Holding Register for PC<20:16> ---0 0000
FFAh PCLATH Holding Register for PC<15:8> 0000 0000
FF9h PCL PC Low Byte (PC<7:0>) 0000 0000
FF8h TBLPTRU — — — Program Memory Table Pointer Upper Byte (TBLPTR<20:16>) --00 0000
FF7h TBLPTRH Program Memory Table Pointer High Byte (TBLPTR<15:8>) 0000 0000
FF6h TBLPTRL Program Memory Table Pointer Low Byte (TBLPTR<7:0>) 0000 0000
FF5h TABLAT Program Memory Table Latch 0000 0000
FF4h PRODH Product Register High Byte xxxx xxxx
FF3h PRODL Product Register Low Byte xxxx xxxx
FF2h INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF 0000 000x
FF1h INTCON2 RBPU INTEDG0 INTEDG1 INTEDG2 INTEDG3 TMR0IP INT3IP RBIP 1111 1111
FF0h INTCON3 INT2IP INT1IP INT3IE INT2IE INT1IE INT3IF INT2IF INT1IF 1100 0000
FEFh INDF0 Uses contents of FSR0 to address data memory – value of FSR0 not changed (not a physical register) N/A
FEEh POSTINC0 Uses contents of FSR0 to address data memory – value of FSR0 post-incremented (not a physical register) N/A
FEDh POSTDEC0 Uses contents of FSR0 to address data memory – value of FSR0 post-decremented (not a physical register) N/A
FECh PREINC0 Uses contents of FSR0 to address data memory – value of FSR0 pre-incremented (not a physical register) N/A
FEBh PLUSW0 Uses contents of FSR0 to address data memory – value of FSR0 pre-incremented (not a physical register) – value
of FSR0 offset by W
N/A
FEAh FSR0H — ——— Indirect Data Memory Address Pointer 0 High Byte ---- 0000
FE9h FSR0L Indirect Data Memory Address Pointer 0 Low Byte xxxx xxxx
FE8h WREG Working Register xxxx xxxx
FE7h INDF1 Uses contents of FSR1 to address data memory – value of FSR1 not changed (not a physical register) N/A
FE6h POSTINC1 Uses contents of FSR1 to address data memory – value of FSR1 post-incremented (not a physical register) N/A
FE5h POSTDEC1 Uses contents of FSR1 to address data memory – value of FSR1 post-decremented (not a physical register) N/A
FE4h PREINC1 Uses contents of FSR1 to address data memory – value of FSR1 pre-incremented (not a physical register) N/A
FE3h PLUSW1 Uses contents of FSR1 to address data memory – value of FSR1 pre-incremented (not a physical register) – value
of FSR1 offset by W
N/A
FE2h FSR1H — ——— Indirect Data Memory Address Pointer 1 High Byte ---- 0000
FE1h FSR1L Indirect Data Memory Address Pointer 1 Low Byte xxxx xxxx
FE0h BSR — ——— Bank Select Register ---- 0000
FDFh INDF2 Uses contents of FSR2 to address data memory – value of FSR2 not changed (not a physical register) N/A
FDEh POSTINC2 Uses contents of FSR2 to address data memory – value of FSR2 post-incremented (not a physical register) N/A
FDDh POSTDEC2 Uses contents of FSR2 to address data memory – value of FSR2 post-decremented (not a physical register) N/A
FDCh PREINC2 Uses contents of FSR2 to address data memory – value of FSR2 pre-incremented (not a physical register) N/A
Note 1: Applicable for 28-pin devices (PIC18F26J13, PIC18F27J13, PIC18LF26J13 and PIC18LF27J13).
2: Applicable for 44-pin devices (PIC18F46J13, PIC18F47J13, PIC18LF46J13 and PIC18LF47J13).
3: Value on POR, BOR.
PIC18F47J13 FAMILY
DS39974A-page 94 Preliminary 2010 Microchip Technology Inc.
FDBh PLUSW2 Uses contents of FSR2 to address data memory – value of FSR2 pre-incremented (not a physical register) – value
of FSR2 offset by W
N/A
FDAh FSR2H — ——— Indirect Data Memory Address Pointer 2 High Byte ---- 0000
FD9h FSR2L Indirect Data Memory Address Pointer 2 Low Byte xxxx xxxx
FD8h STATUS — — —NOVZ DCC---x xxxx
FD7h TMR0H Timer0 Register High Byte 0000 0000
FD6h TMR0L Timer0 Register Low Byte xxxx xxxx
FD5h T0CON TMR0ON T08BIT T0CS T0SE PSA T0PS2 T0PS1 T0PS0 1111 1111
FD3h OSCCON IDLEN IRCF2 IRCF1 IRCF0 OSTS — SCS1 SCS0 0110 q100
FD2h CM1CON CON COE CPOL EVPOL1 EVPOL0 CREF CCH1 CCH0 0001 1111
FD1h CM2CON CON COE CPOL EVPOL1 EVPOL0 CREF CCH1 CCH0 0001 1111
FD0h RCON IPEN —CMRI TO PD POR BOR 0-11 11qq
FCFh TMR1H Timer1 Register High Byte xxxx xxxx
FCEh TMR1L Timer1 Register Low Bytes xxxx xxxx
FCDh T1CON TMR1CS1 TMR1CS0 T1CKPS1 T1CKPS0 T1OSCEN T1SYNC RD16 TMR1ON 0000 0000
FCCh TMR2 Timer2 Register 0000 0000
FCBh PR2 Timer2 Period Register 1111 1111
FCAh T2CON — T2OUTPS3 T2OUTPS2 T2OUTPS1 T2OUTPS0 TMR2ON T2CKPS1 T2CKPS0 -000 0000
FC9h SSP1BUF MSSP1 Receive Buffer/Transmit Register xxxx xxxx
FC8h SSP1ADD MSSP1 Address Register (I2C™ Slave mode). MSSP1 Baud Rate Reload Register (I2C Master mode). 0000 000 0
FC8h SSP1MSK MSK7 MSK6 MSK5 MSK4 MSK3 MSK2 MSK1 MSK0 11 11 1111
FC7h SSP1STAT SMP CKE D/A PSR/WUA BF 0000 0000
FC6h SSP1CON1 WCOL SSPOV SSPEN CKP SSPM3 SSPM2 SSPM1 SSPM0 0000 0000
FC5h SSP1CON2 GCEN ACKSTAT ACKDT ACKEN RCEN PEN RSEN SEN 0000 0000
FC5h SSP1CON2 GCEN ACKSTAT ADMSK5 ADMSK4 ADMSK3 ADMSK2 ADMSK1 SEN 0000 0000
FC4h ADRESH A/D Result Register High Byte xxxx xxxx
FC3h ADRESL A/D Result Register Low Byte xxxx xxxx
FC2h ADCON0 VCFG1 VCFG0 CHS3 CHS2 CHS1 CHS0 GO/DONE ADON 0000 0000
FC1h ADCON1 ADFM ADCAL ACQT2 ACQT1 ACQT0 ADCS2 ADCS1 ADCS0 0000 0000
FC0h WDTCON REGSLP LVDSTAT ULPLVL VBGOE DS ULPEN ULPSINK SWDTEN 1qq0 q000
FBFh PSTR1CON CMPL1 CMPL0 — STRSYNC STRD STRC STRB STRA 00-0 0001
FBEh ECCP1AS ECCP1ASE ECCP1AS2 ECCP1AS1 ECCP1AS0 PSS1AC1 PSS1AC0 PSS1BD1 PSS1BD0 0000 000 0
FBDh ECCP1DEL P1RSEN P1DC6 P1DC5 P1DC4 P1DC3 P1DC2 P1DC1 P1DC0 0000 0000
FBCh CCPR1H Capture/Compare/PWM Register 1 High Byte xxxx xxxx
FBBh CCPR1L Capture/Compare/PWM Register 1 Low Byte xxxx xxxx
FBAh CCP1CON P1M1 P1M0 DC1B1 DC1B0 CCP1M3 CCP1M2 CCP1M1 CCP1M0 0000 0000
FB9h PSTR2CON CMPL1 CMPL0 — STRSYNC STRD STRC STRB STRA 00-0 000 1
FB8h ECCP2AS ECCP2ASE ECCP2AS2 ECCP2AS1 ECCP2AS0 PSS2AC1 PSS2AC0 PSS2BD1 PSS2BD0 0000 000 0
FB7h ECCP2DEL P2RSEN P2DC6 P2DC5 P2DC4 P2DC3 P2DC2 P2DC1 P2DC0 0000 000 0
FB6h CCPR2H Capture/Compare/PWM Register 2 High Byte xxxx xxxx
FB5h CCPR2L Capture/Compare/PWM Register 2 Low Byte xxxx xxxx
FB4h CCP2CON P2M1 P2M0 DC2B1 DC2B0 CCP2M3 CCP2M2 CCP2M1 CCP2M0 0000 000 0
FB3h CTMUCONH CTMUEN — CTMUSIDL TGEN EDGEN EDGSEQEN IDISSEN CTTRIG 0-00 0000
FB2h CTMUCONL EDG2POL EDG2SEL1 EDG2SEL0 EDG1POL EDG1SEL1 EDG1SEL0 EDG2STAT EDG1STAT 0000 00xx
FB1h CTMUICON ITRIM5 ITRIM4 ITRIM3 ITRIM2 ITRIM1 ITRIM0 IRNG1 IRNG0 0000 0000
FB0h SPBRG1 EUSART1 Baud Rate Generator Register Low Byte 0000 0000
FAFh RCREG1 EUSART1 Receive Register 0000 0000
FAEh TXREG1 EUSART1 Transmit Register 0000 0000
FADh TXSTA1 CSRC TX9 TXEN SYNC SENDB BRGH TRMT TX9D 0000 0010
TABLE 6-4: REGISTER FILE SUMMARY (PIC18F47J13 FAMILY) (CONTINUED)
Addr. File Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Valu e on
POR, BOR
Note 1: Applicable for 28-pin devices (PIC18F26J13, PIC18F27J13, PIC18LF26J13 and PIC18LF27J13).
2: Applicable for 44-pin devices (PIC18F46J13, PIC18F47J13, PIC18LF46J13 and PIC18LF47J13).
3: Value on POR, BOR.
2010 Microchip Technology Inc. Preliminary DS39974A-page 95
PIC18F47J13 FAMILY
FACh RCSTA1 SPEN RX9 SREN CREN ADDEN FERR OERR RX9D 0000 000 0
FABh SPBRG2 EUSART2 Baud Rate Generator Register Low Byte 0000 0000
FAAh RCREG2 EUSART2 Receive Register 0000 0000
FA9h TXREG2 EUSART2 Transmit Register 0000 0000
FA8h TXSTA2 CSRC TX9 TXEN SYNC SENDB BRGH TRMT TX9D 0000 0010
FA7h EECON2 Flash Self-Program Control Register (not a physical register) ---- ----
FA6h EECON1 —— WPROG FREE WRERR WREN WR —--00 x00-
FA5h IPR3 SSP2IP BCL2IP RC2IP TX2IP TMR4IP CTMUIP TMR3GIP RTCCIP 1111 1111
FA4h PIR3 SSP2IF BCL2IF RC2IF TX2IF TMR4IF CTMUIF TMR3GIF RTCCIF 0000 000 0
FA3h PIE3 SSP2IE BCL2IE RC2IE TX2IE TMR4IE CTMUIE TMR3GIE RTCCIE 0000 0000
FA2h IPR2 OSCFIP CM2IP CM1IP — BCL1IP HLVDIP TMR3IP CCP2IP 111- 1111
FA1h PIR2 OSCFIF CM2IF CM1IF — BCL1IF HLVDIF TMR3IF CCP2IF 000- 0000
FA0h PIE2 OSCFIE CM2IE CM1IE — BCL1IE HLVDIE TMR3IE CCP2IE 000- 0000
F9Fh IPR1 PMPIP(2) ADIP RC1IP TX1IP SSP1IP CCP1IP TMR2IP TMR1IP 1111 1111
F9Eh PIR1 PMPIF(2) ADIF RC1IF TX1IF SSP1IF CCP1IF TMR2IF TMR1IF 0000 0000
F9Dh PIE1 PMPIE(2) ADIE RC1IE TX1IE SSP1IE CCP1IE TMR2IE TMR1IE 0000 0000
F9Ch RCSTA2 SPEN RX9 SREN CREN ADDEN FERR OERR RX9D 0000 0000
F9Bh OSCTUNE INTSRC PLLEN TUN5 TUN4 TUN3 TUN2 TUN1 TUN0 0000 0000
F9Ah T1GCON TMR1GE T1GPOL T1GTM T1GSPM T1GGO/
T1DONE
T1GVAL T1GSS1 T1GSS0 0000 0x00
F99h IPR5 —— CM3IP TMR8IP TMR6IP TMR5IP TMR5GIP TMR1GIP --11 111 1
F98h PIR5 —— CM3IF TMR8IF TMR6IF TMR5IF TMR5GIF TMR1GIF --00 0000
F97h T3GCON TMR3GE T3GPOL T3GTM T3GSPM T3GGO/
T3DONE
T3GVAL T3GSS1 T3GSS0 0000 0x00
F96h TRISE(2) RDPU REPU ——— TRISE2 TRISE1 TRISE0 00-- -111
F95h TRISD(2) TRISD7 TRISD6 TRISD5 TRISD4 TRISD3 TRISD2 TRISD1 TRISD0 1111 1111
F94h TRISC TRISC7 TRISC6 TRISC5 TRISC4 TRISC3 TRISC2 TRISC1 TRISC0 1111 1111
F93h TRISB TRISB7 TRISB6 TRISB5 TRISB4 TRISB3 TRISB2 TRISB1 TRISB0 11 11 1111
F92h TRISA TRISA7 TRISA6 TRISA5 — TRISA3 TRISA2 TRISA1 TRISA0 111- 1111
F91h PIE5 —— CM3IE TMR8IE TMR6IE TMR5IE TMR5GIE TMR1GIE --00 0000
F90h IPR4 CCP10IP CCP9IP CCP8IP CCP7IP CCP6IP CCP5IP CCP4IP CCP3IP 1111 1111
F8Fh PIR4 CCP10IF CCP9IF CCP8IF CCP7IF CCP6IF CCP5IF CCP4IF CCP3IF 0000 0000
F8Eh PIE4 CCP10IE CCP9IE CCP8IE CCP7IE CCP6IE CCP5IE CCP4IE CCP3IE 0000 0000
F8Dh LATE(2) — ———— LATE2 LATE1 LATE0 ---- -xxx
F8Ch LATD(2) LATD7 LATD6 LATD5 LATD4 LATD3 LATD2 LATD1 LATD0 xxxx xxxx
F8Bh LATC LATC7 LATC6 LATC5 LATC4 LATC3 LATC2 LATC1 LATC0 xxxx xxxx
F8Ah LATB LATB7 LATB6 LATB5 LATB4 LATB3 LATB2 LATB1 LATB0 xxxx xxxx
F89h LATA LATA7 LATA6 LATA5 — LATA3 LATA2 LATA1 LATA0 xxx- xxxx
F88h DMACON1 SSCON1 SSCON0 TXINC RXINC DUPLEX1 DUPLEX0 DLYINTEN DMAEN 0000 0000
F87h OSCCON2 — SOSCRUN — SOSCDRV SOSCGO PRISD — — -0-1 01--
F86h DMACON2 DLYCYC3 DLYCYC2 DLYCYC1 DLYCYC0 INTLVL3 INTLVL2 INTLVL1 INTLVL0 0000 0000
F85h HLVDCON VDIRMAG BGVST IRVST HLVDEN HLVDL3 HLVDL2 HLVDL1 HLVDL0 0000 0000
F84h PORTE(2) — ————RE2RE1RE0---- -xxx
F83h PORTD RD7 RD6 RD5 RD4 RD3 RD2 RD1 RD0 xxxx xxxx
F82h PORTC RC7 RC6 RC5 RC4 RC3 RC2 RC1 RC0 xxxx xxxx
F81h PORTB RB7 RB6 RB5 RB4 RB3 RB2 RB1 RB0 xxxx xxxx
F80h PORTA RA7 RA6 RA5 — RA3 RA2 RA1 RA0 xxx- xxxx
F7Fh SPBRGH1 EUSART1 Baud Rate Generator High Byte 0000 0000
F7Eh BAUDCON1 ABDOVF RCIDL RXDTP TXCKP BRG16 — WUE ABDEN 0100 0-00
TABLE 6-4: REGISTER FILE SUMMARY (PIC18F47J13 FAMILY) (CONTINUED)
Addr. File Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Valu e on
POR, BOR
Note 1: Applicable for 28-pin devices (PIC18F26J13, PIC18F27J13, PIC18LF26J13 and PIC18LF27J13).
2: Applicable for 44-pin devices (PIC18F46J13, PIC18F47J13, PIC18LF46J13 and PIC18LF47J13).
3: Value on POR, BOR.
PIC18F47J13 FAMILY
DS39974A-page 96 Preliminary 2010 Microchip Technology Inc.
F7Dh SPBRGH2 EUSART2 Baud Rate Generator High Byte 0000 0000
F7Ch BAUDCON2 ABDOVF RCIDL RXDTP TXCKP BRG16 — WUE ABDEN 0100 0-00
F7Bh TMR3H Timer3 Register High Byte xxxx xxxx
F7Ah TMR3L Timer3 Register Low Byte xxxx xxxx
F79h T3CON TMR3CS1 TMR3CS0 T3CKPS1 T3CKPS0 T3OSCEN T3SYNC RD16 TMR3ON 0000 0000
F78h TMR4 Timer4 Register 0000 0000
F77h PR4 Timer4 Period Register 1111 111 1
F76H T4CON — T4OUTPS3 T4OUTPS2 T4OUTPS1 T4OUTPS0 TMR4ON T4CKPS1 T4CKPS0 -000 0000
F75h SSP2BUF MSSP2 Receive Buffer/Transmit Register xx xx xxxx
F74h SSP2ADD MSSP2 Address Register (I2C™ Slave mode)/MSSP2 Baud Rate Reload Register (I2C Master mode) 0000 0000
F74h SSP2MSK MSK7 MSK6 MSK5 MSK4 MSK3 MSK2 MSK1 MSK0 1111 1111
F73h SSP2STAT SMP CKE D/A PSR/WUA BF 0000 0000
F72h SSP2CON1 WCOL SSPOV SSPEN CKP SSPM3 SSPM2 SSPM1 SSPM0 0000 0000
F71h SSP2CON2 GCEN ACKSTAT ACKDT
ADMSK5
ACKEN
ADMSK4
RCEN
ADMSK3
PEN
ADMSK2
RSEN
ADMSK1
SEN 0000 0000
F70h CMSTAT — ———— COUT3 COUT2 COUT1 ---- -111
F6Fh PMADDRH/
PMDOUT1H(2) — CS1 Parallel Master Port Address High Byte -000 0000
Parallel Port Out Data High Byte (Buffer 1) 0000 0000
F6Eh PMADDRL/
PMDOUT1L(2) Parallel Master Port Address Low Byte/
Parallel Port Out Data Low Byte (Buffer 1)
0000 0000
F6Dh PMDIN1H(2) Parallel Port In Data High Byte (Buffer 1) 0000 0000
F6Ch PMDIN1L(2) Parallel Port In Data Low Byte (Buffer 1) 0000 0000
F6Bh TXADDRL SPI DMA Transmit Data Pointer Low Byte 0000 0000
F6Ah TXADDRH — ——— SPI DMA Transmit Data Pointer High Byte ---- 0000
F69h RXADDRL SPI DMA Receive Data Pointer Low Byte 0000 0000
F68h RXADDRH — ——— SPI DMA Receive Data Pointer High Byte ---- 0000
F67h DMABCL SPI DMA Byte Count Low Byte 0000 0000
F66h DMABCH — ———— — SPI DMA Byte Count High
Byte
---- --00
F5Fh PMCONH(2) PMPEN —— ADRMUX1 ADRMUX0 PTBEEN PTWREN PTRDEN 0--0 0000
F5Eh PMCONL(2) CSF1 CSF0 ALP — CS1P BEP WRSP RDSP 000- 0000
F5Dh PMMODEH(2) BUSY IRQM1 IRQM0 INCM1 INCM0 MODE16 MODE1 MODE0 0000 0000
F5Ch PMMODEL(2) WAITB1 WAITB0 WAITM3 WAITM2 WAITM1 WAITM0 WAITE1 WAITE0 0000 0000
F5Bh PMDOUT2H(2) Parallel Port Out Data High Byte (Buffer 2) 0000 0000
F5Ah PMDOUT2L(2) Parallel Port Out Data Low Byte (Buffer 2) 0000 0000
F59h PMDIN2H(2) Parallel Port In Data High Byte (Buffer 2) 0000 0000
F58h PMDIN2L(2) Parallel Port In Data Low Byte (Buffer 2) 0000 0000
F57h PMEH(2) PTEN15 PTEN14 PTEN13 PTEN12 PTEN11 PTEN10 PTEN9 PTEN8 0000 0000
F56h PMEL(2) PTEN7 PTEN6 PTEN5 PTEN4 PTEN3 PTEN2 PTEN1 PTEN0 0000 0000
F55h PMSTATH(2) IBF IBOV —— IB3F IB2F IB1F IB0F 00-- 0000
F54h PMSTATL(2) OBE OBUF —— OB3E OB2E OB1E OB0E 10-- 1111
F53h CVRCON CVREN CVROE CVRR CVRSS CVR3 CVR2 CVR1 CVR0 0000 0000
F52h CCPTMRS0 C3TSEL1 C3TSEL0 C2TSEL2 C2TSEL1 C2TSEL0 C1TSEL2 C1TSEL1 C1TSEL0 0000 0000
F51h CCPTMRS1 C7TSEL1 C7TSEL0 — C6TSEL0 — C5TSEL0 C4TSEL1 C4TSEL0 00-0 -000
F50h CCPTMRS2 — — — C10TSEL0 — C9TSEL0 C8TSEL1 C8TSEL0 ---0 -000
F4Fh DSGPR1 Deep Sleep Persistent General Purpose Register (contents retained even in Deep Sleep) xxxx xxxx
F4Eh DSGPR0 Deep Sleep Persistent General Purpose Register (contents retained even in Deep Sleep) xxxx xxxx
F4Dh DSCONH DSEN ———— CFGPER2 DSULPEN RTCWDIS 0--- -000
F4Ch DSCONL — ———— ULPWDIS DSBOR RELEASE ---- -000
TABLE 6-4: REGISTER FILE SUMMARY (PIC18F47J13 FAMILY) (CONTINUED)
Addr. File Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Valu e on
POR, BOR
Note 1: Applicable for 28-pin devices (PIC18F26J13, PIC18F27J13, PIC18LF26J13 and PIC18LF27J13).
2: Applicable for 44-pin devices (PIC18F46J13, PIC18F47J13, PIC18LF46J13 and PIC18LF47J13).
3: Value on POR, BOR.
2010 Microchip Technology Inc. Preliminary DS39974A-page 97
PIC18F47J13 FAMILY
F4Bh DSWAKEH — — — — — — —DSINT0---- ---0
F4Ah DSWAKEL DSFLT — DSULP DSWDT DSRTC DSMCLR —DSPOR0-00 00-1
F49h ANCON1 VBGEN —— PCFG12 PCFG11 PCFG10 PCFG9 PCFG8 0--0 0000
F48h ANCON0 PCFG7(2) PCFG6(2) PCFG5(2) PCFG4 PCFG3 PCFG2 PCFG1 PCFG0 0000 0000
F47h ALRMCFG ALRMEN CHIME AMASK3 AMASK2 AMASK1 AMASK0 ALRMPTR1 ALRMPTR0 0000 0000
F46h ALRMRPT ARPT7 ARPT6 ARPT5 ARPT4 ARPT3 ARPT2 ARPT1 ARPT0 0000 0000
F45h ALRMVALH Alarm Value High Register Window based on ALRMPTR<1:0> xxxx xxxx
F44h ALRMVALL Alarm Value Low Register Window based on ALRMPTR<1:0> xxxx xxxx
F43h — — — — — — — — — ---- ----
F42h ODCON1 CCP8OD CCP7OD CCP6OD CCP5OD CCP4OD ECCP3OD ECCP2OD ECCP1OD 0000 0000
F41h ODCON2 — ——— CCP10OD CCP9OD U2OD U1OD ---- 0000
F40h ODCON3 CTMUDS ———— — SPI2OD SPI1OD 0--- --00
F3Fh RTCCFG RTCEN — RTCWREN RTCSYNC HALFSEC RTCOE RTCPTR1 RTCPTR0 0-00 0000
F3Eh RTCCAL CAL7 CAL6 CAL5 CAL4 CAL3 CAL2 CAL1 CAL0 0000 0000
F3Dh REFOCON ROON — ROSSLP ROSEL RODIV3 RODIV2 RODIV1 RODIV0 0-00 0000
F3Ch PADCFG1 — ———— RTSECSEL1 RTSECSEL0 PMPTTL(2) ---- -000
F3Bh RTCVALH RTCC Value High Register Window based on RTCPTR<1:0> 0xxx xxxx
F3Ah RTCVALL RTCC Value Low Register Window based on RTCPTR<1:0> 0xxx xxxx
F25h CM3CON CON COE CPOL EVPOL1 EVPOL0 CREF CCH1 CCH0 0001 1111
F24h TMR5H Timer5 Register High Byte xxxx xxxx
F23h TMR5L Timer5 Register Low Bytes xxxx xxxx
F22h T5CON TMR5CS1 TMR5CS0 T5CKPS1 T5CKPS0 T5OSCEN T5SYNC RD16 TMR5ON 0000 0000
F21h T5GCON TMR5GE T5GPOL T5GTM T5GSPM T5GGO/
T5DONE
T5GVAL T5GSS1 T5GSS0 0000 0x00
F20h TMR6 Timer6 Register 0000 0000
F1Fh PR6 Timer6 Period Register 1111 1111
F1Eh T6CON — T6OUTPS3 T6OUTPS2 T6OUTPS1 T6OUTPS0 TMR6ON T6CKPS1 T6CKPS0 -000 0000
F1Dh TMR8 Timer8 Register 0000 0000
F1Ch PR8 Timer8 Period Register 1111 1111
F1Bh T8CON — T8OUTPS3 T8OUTPS2 T8OUTPS1 T8OUTPS0 TMR8ON T8CKPS1 T8CKPS0 -000 0000
F1Ah PSTR3CON CMPL1 CMPL0 — STRSYNC STRD STRC STRB STRA 00-0 0001
F19h ECCP3AS ECCP3ASE ECCP3AS2 ECCP3AS1 ECCP3AS0 PSS3AC1 PSS3AC0 PSS3BD1 PSS3BD0 0000 0000
F18h ECCP3DEL P3RSEN P3DC6 P3DC5 P3DC4 P3DC3 P3DC2 P3DC1 P3DC0 0000 0000
F17h CCPR3H Capture/Compare/PWM Register 3 High Byte xxxx xxxx
F16h CCPR3L Capture/Compare/PWM Register 3 Low Byte xxxx xxxx
F15h CCP3CON P3M1 P3M0 DC3B1 DC3B0 CCP3M3 CCP3M2 CCP3M1 CCP3M0 0000 0000
F14h CCPR4H Capture/Compare/PWM Register 4 High Byte xxxx xxxx
F13h CCPR4L Capture/Compare/PWM Register 4 Low Byte xxxx xxxx
F12h CCP4CON —— DC4B1 DC4B0 CCP4M3 CCP4M2 CCP4M1 CCP4M0 --00 0000
F11h CCPR5H Capture/Compare/PWM Register 5 High Byte xxxx xxxx
F10h CCPR5L Capture/Compare/PWM Register 5 Low Byte xxxx xxxx
F0Fh CCP5CON —— DC5B1 DC5B0 CCP5M3 CCP5M2 CCP5M1 CCP5M0 --00 0000
F0Eh CCPR6H Capture/Compare/PWM Register 6 High Byte xxxx xxxx
F0Dh CCPR6L Capture/Compare/PWM Register 6 Low Byte xxxx xxxx
F0Ch CCP6CON —— DC6B1 DC6B0 CCP6M3 CCP6M2 CCP6M1 CCP6M0 --00 0000
F0Bh CCPR7H Capture/Compare/PWM Register 7 High Byte xxxx xxxx
F0Ah CCPR7L Capture/Compare/PWM Register 7 Low Byte xxxx xxxx
F09h CCP7CON —— DC7B1 DC7B0 CCP7M3 CCP7M2 CCP7M1 CCP7M0 --00 0000
F08h CCPR8H Capture/Compare/PWM Register 8 High Byte xxxx xxxx
TABLE 6-4: REGISTER FILE SUMMARY (PIC18F47J13 FAMILY) (CONTINUED)
Addr. File Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Valu e on
POR, BOR
Note 1: Applicable for 28-pin devices (PIC18F26J13, PIC18F27J13, PIC18LF26J13 and PIC18LF27J13).
2: Applicable for 44-pin devices (PIC18F46J13, PIC18F47J13, PIC18LF46J13 and PIC18LF47J13).
3: Value on POR, BOR.
PIC18F47J13 FAMILY
DS39974A-page 98 Preliminary 2010 Microchip Technology Inc.
F07h CCPR8L Capture/Compare/PWM Register 8 Low Byte xxxx xxxx
F06h CCP8CON —— DC8B1 DC8B0 CCP8M3 CCP8M2 CCP8M1 CCP8M0 --00 0000
F05h CCPR9H Capture/Compare/PWM Register 9 High Byte xxxx xxxx
F04h CCPR9L Capture/Compare/PWM Register 9 Low Byte xxxx xxxx
F03h CCP9CON —— DC9B1 DC9B0 CCP9M3 CCP9M2 CCP9M1 CCP9M0 --00 0000
F02h CCPR10H Capture/Compare/PWM Register 10 High Byte xxxx xxxx
F01h CCPR10L Capture/Compare/PWM Register 10 Low Byte xxxx xxxx
F00h CCP10CON —— DC10B1 DC10B0 CCP10M3 CCP10M2 CCP10M1 CCP10M0 --00 0000
EFFh RPINR24 — — — PWM Fault Input (FLT0) to Input Pin Mapping bits ---1 1111
EFEh RPINR23 — — — SPI2 Slave Select Input (SS2) to Input Pin Mapping bits ---1 1111
EFDh RPINR22 — — — SPI2 Clock Input (SCK2) to Input Pin Mapping bits ---1 1111
EFCh RPINR21 — — — SPI2 Data Input (SDI2) to Input Pin Mapping bits ---1 1111
EFBh — — — — — — — — — (3)
EFAh — — — — — — — — — (3)
EF9h — — — — — — — — — (3)
EF8h RPINR17 — — — EUSART2 Clock Input (CK2) to Input Pin Mapping bits ---1 1111
EF7h RPINR16 — — — EUSART2 RX2/DT2 to Input Pin Mapping bits ---1 1111
EF6h — — — — — — — — — (3)
EF5h — — — — — — — — — (3)
EF4h RPINR14 — — — Timer5 Gate Input (T5G) to Input Pin Mapping bits ---1 1111
EF3h RPINR13 — — — Timer3 Gate Input (T3G) to Input Pin Mapping bits ---1 1111
EF2h RPINR12 — — — Timer1 Gate Input (T1G) to Input Pin Mapping bits ---1 1111
EF1h — — — — — — — — — (3)
EF0h — — — — — — — — — (3)
EEFh — — — — — — — — — (3)
EEEh — — — — — — — — — (3)
EEDh — — — — — — — — — (3)
EECh — — — — — — — — — (3)
EEBh — — — — — — — — — (3)
EEAh RPINR9 — — — ECCP3 Input Capture (IC3) to Input Pin Mapping bits ---1 1111
EE9h RPINR8 — — — ECCP2 Input Capture (IC2) to Input Pin Mapping bits ---1 1111
EE8h RPINR7 — — — ECCP1 Input Capture (IC1) to Input Pin Mapping bits ---1 1111
EE7h RPINR15 — — — Timer5 External Clock Input (T5CKI) to Input Pin Mapping bits ---1 1111
EE6h RPINR6 — — — Timer3 External Clock Input (T3CKI) to Input Pin Mapping bits ---1 1111
EE5h — — — — — — — — — (3)
EE4h RPINR4 — — — Timer0 External Clock Input (T0CKI) to Input Pin Mapping bits ---1 1111
EE3h RPINR3 — — — External Interrupt (INT3) to Input Pin Mapping bits ---1 1111
EE2h RPINR2 — — — External Interrupt (INT2) to Input Pin Mapping bits ---1 1111
EE1h RPINR1 — — — External Interrupt (INT1) to Input Pin Mapping bits ---1 1111
EE0h — — — — — — — — — (3)
EDFh — — — — — — — — — (3)
EDEh — — — — — — — — — (3)
EDDh — — — — — — — — — (3)
EDCh — — — — — — — — — (3)
EDBh — — — — — — — — — (3)
EDAh — — — — — — — — — (3)
ED9h — — — — — — — — — (3)
ED8h RPOR24(2) — — — Remappable Pin RP24 Output Signal Select bits ---0 0000
ED7h RPOR23(2) — — — Remappable Pin RP23 Output Signal Select bits ---0 0000
TABLE 6-4: REGISTER FILE SUMMARY (PIC18F47J13 FAMILY) (CONTINUED)
Addr. File Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Valu e on
POR, BOR
Note 1: Applicable for 28-pin devices (PIC18F26J13, PIC18F27J13, PIC18LF26J13 and PIC18LF27J13).
2: Applicable for 44-pin devices (PIC18F46J13, PIC18F47J13, PIC18LF46J13 and PIC18LF47J13).
3: Value on POR, BOR.
2010 Microchip Technology Inc. Preliminary DS39974A-page 99
PIC18F47J13 FAMILY
ED6h RPOR22(2) — — — Remappable Pin RP22 Output Signal Select bits ---0 0000
ED5h RPOR21(2) — — — Remappable Pin RP21 Output Signal Select bits ---0 0000
ED4h RPOR20(2) — — — Remappable Pin RP20 Output Signal Select bits ---0 0000
ED3h RPOR19(2) — — — Remappable Pin RP19 Output Signal Select bits ---0 0000
ED2h RPOR18 — — — Remappable Pin RP18 Output Signal Select bits ---0 0000
ED1h RPOR17 — — — Remappable Pin RP17 Output Signal Select bits ---0 0000
ED0h RPOR16 — — — Remappable Pin RP16 Output Signal Select bits ---0 0000
ECFh RPOR15 — — — Remappable Pin RP15 Output Signal Select bits ---0 0000
ECEh RPOR14 — — — Remappable Pin RP14 Output Signal Select bits ---0 0000
ECDh RPOR13 — — — Remappable Pin RP13 Output Signal Select bits ---0 0000
ECCh RPOR12 — — — Remappable Pin RP12 Output Signal Select bits ---0 0000
ECBh RPOR11 — — — Remappable Pin RP11 Output Signal Select bits ---0 0000
ECAh RPOR10 — — — Remappable Pin RP10 Output Signal Select bits ---0 0000
EC9h RPOR9 — — — Remappable Pin RP9 Output Signal Select bits ---0 0000
EC8h RPOR8 — — — Remappable Pin RP8 Output Signal Select bits ---0 0000
EC7h RPOR7 — — — Remappable Pin RP7 Output Signal Select bits ---0 0000
EC6h RPOR6 — — — Remappable Pin RP6 Output Signal Select bits ---0 0000
EC5h RPOR5 — — — Remappable Pin RP5 Output Signal Select bits ---0 0000
EC4h RPOR4 — — — Remappable Pin RP4 Output Signal Select bits ---0 0000
EC3h RPOR3 — — — Remappable Pin RP3 Output Signal Select bits ---0 0000
EC2h RPOR2 — — — Remappable Pin RP2 Output Signal Select bits ---0 0000
EC1h RPOR1 — — — Remappable Pin RP1 Output Signal Select bits ---0 0000
EC0h RPOR0 — — — Remappable Pin RP0 Output Signal Select bits ---0 0000
EBFh PPSCON — — — — — — — IOLOCK ---- ---0
EBEh — — — — — — — — — (3)
EBDh — — — — — — — — — (3)
EBCh PMDIS3 CCP10MD CCP9MD CCP8MD CCP7MD CCP6MD CCP5MD CCP4MD —0000 000-
EBBh PMDIS2 —TMR8MD— TMR6MD TMR5MD CMP3MD CMP2MD CMP1MD -0-0 0000
EBAh PMDIS1 PSPMD(2) CTMUMD RTCCMD TMR4MD TMR3MD TMR2MD TMR1MD —0000 000-
EB9h PMDIS0 ECCP3MD ECCP2MD ECCP1MD UART2MD UART1MD SPI2MD SPI1MD ADCMD 0000 0000
EB8h ADCTRIG — ———— —SRC1SRC0---- --00
EB7h — — — — — — — — — (3)
EB6h — — — — — — — — — (3)
EB5h — — — — — — — — — (3)
EB4h — — — — — — — — — (3)
EB3h — — — — — — — — — (3)
EB2h — — — — — — — — — (3)
EB1h — — — — — — — — — (3)
EB0h — — — — — — — — — (3)
TABLE 6-4: REGISTER FILE SUMMARY (PIC18F47J13 FAMILY) (CONTINUED)
Addr. File Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Valu e on
POR, BOR
Note 1: Applicable for 28-pin devices (PIC18F26J13, PIC18F27J13, PIC18LF26J13 and PIC18LF27J13).
2: Applicable for 44-pin devices (PIC18F46J13, PIC18F47J13, PIC18LF46J13 and PIC18LF47J13).
3: Value on POR, BOR.
PIC18F47J13 FAMILY
DS39974A-page 100 Preliminary 2010 Microchip Technology Inc.
6.3.5 STATUS REGISTER
The STATUS register, shown in Register 6-2, contains
the arithmetic status of the ALU. The STATUS register
can be the operand for any instruction, as with any
other register. If the STATUS register is the destination
for an instruction that affects the Z, DC, C, OV or N bits,
then the write to these five bits is disabled.
These bits are set or cleared according to the device
logic. Therefore, the result of an instruction with the
STATUS register as destination may be different than
intended. For example, CLRF STATUS will set the Z bit
but leave the other bits unchanged. The STATUS
register then reads back as ‘000u u1uu’. It is recom-
mended, therefore, that only BCF, BSF, SWAPF , MOVFF
and MOVWF instructions are used to alter the STATUS
register because these instructions do not affect the Z,
C, DC, OV or N bits in the STATUS register.
For other instructions not affecting any Status bits, see
the instruction set summary in Table 28-2 and
Table 28-3.
Note: The C and DC bits operate as Borrow and
Digit Borrow bits, respectively in
subtraction.
REGISTER 6-2: STATUS REGISTER (ACCESS FDBh)
U-0 U-0 U-0 R/W-x R/W-x R/W-x R/W-x R/W-x
— — —NOVZDC
(1) C(2)
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4 N: Negative bit
This bit is used for signed arithmetic (2’s complement). It indicates whether the result was negative
(ALU MSB = 1).
1 = Result was negative
0 = Result was positive
bit 3 OV: Overflow bit
This bit is used for signed arithmetic (2’s complement). It indicates an overflow of the 7-bit magnitude,
which causes the sign bit (Bit 7) to change state.
1 = Overflow occurred for signed arithmetic (in this arithmetic operation)
0 = No overflow occurred
bit 2 Z: Zero bit
1 = The result of an arithmetic or logic operation is zero
0 = The result of an arithmetic or logic operation is not zero
bit 1 DC: Digit Carry/Digit Borrow bit(1)
For ADDWF, ADDLW, SUBLW and SUBWF instructions:
1 = A carry out from the 4th low-order bit of the result occurred
0 = No carry out from the 4th low-order bit of the result
bit 0 C: Carry/Borrow bit(2)
For ADDWF, ADDLW, SUBLW and SUBWF instructions:
1 = A carry out from the MSb of the result occurred
0 = No carry out from the MSb of the result occurred
Note 1: For Digit Borrow, the polarity is reversed. A subtraction is executed by adding the 2’s complement of the
second operand. For rotate (RRF, RLF) instructions, this bit is loaded with either bit 4 or bit 3 of the source
register.
2: For Borrow, the polarity is reversed. A subtraction is executed by adding the 2’s complement of the sec-
ond operand. For rotate (RRF, RLF) instructions, this bit is loaded with either the high or low-order bit of the
source register.
2010 Microchip Technology Inc. Preliminary DS39974A-page 101
PIC18F47J13 FAMILY
6.4 Data Addressing Modes
While the program memory can be addressed in only
one way through the PC, information in the data mem-
ory space can be addressed in several ways. For most
instructions, the addressing mode is fixed. Other
instructions may use up to three modes, depending on
which operands are used and whether or not the
extended instruction set is enabled.
The addressing modes are:
• Inherent
• Literal
•Direct
•Indirect
An additional addressing mode, Indexed Literal Offset,
is available when the extended instruction set is
enabled (XINST Configuration bit = 1). Its operation is
discussed in more detail in Section 6.6.1 “Indexed
Addressing with Literal Offset”.
6.4.1 INHERENT AND LITERAL
ADDRESSING
Many PIC18 control instructions do not need any
argument at all; they either perform an operation that
globally affects the device, or they operate implicitly on
one register. This addressing mode is known as
Inherent Addressing. Examples include SLEEP, RESET
and DAW.
Other instructions work in a similar way, but require an
additional explicit argument in the opcode. This is
known as Literal Addressing mode, because they
require some literal value as an argument. Examples
include ADDLW and MOVLW, which respectively, add or
move a literal value to the W register. Other examples
include CALL and GOTO, which include a 20-bit
program memory address.
6.4.2 DIRECT ADDRESSING
Direct Addressing specifies all or part of the source
and/or destination address of the operation within the
opcode itself. The options are specified by the
arguments accompanying the instruction.
In the core PIC18 instruction set, bit-oriented and
byte-oriented instructions use some version of Direct
Addressing by default. All of these instructions include
some 8-bit literal address as their LSB. This address
specifies either a register address in one of the banks
of data RAM (Section 6.3.3 “General Purpose
Register File”) or a location in the Access Bank
(Section 6.3.2 “Acc ess Bank ”) as the data source for
the instruction.
The Access RAM bit, ‘a’, determines how the address
is interpreted. When ‘a’ is ‘1’, the contents of the BSR
(Section 6.3.1 “Bank Sel ect Register” ) are used with
the address to determine the complete 12-bit address
of the register. When ‘a’ is ‘0’, the address is interpreted
as being a register in the Access Bank. Addressing that
uses the Access RAM is sometimes also known as
Direct Forced Addressing mode.
A few instructions, such as MOVFF, include the entire
12-bit address (either source or destination) in their
opcodes. In these cases, the BSR is ignored entirely.
The destination of the operation’s results is determined
by the destination bit, ‘d’. When ‘d’ is ‘1’, the results are
stored back in the source register, overwriting its
original contents. When ‘d’ is ‘0’, the results are stored
in the W register. Instructions without the ‘d’ argument
have a destination that is implicit in the instruction; their
destination is either the target register being operated
on or the W register.
6.4.3 INDIRECT ADDRESSING
Indirect Addressing allows the user to access a location
in data memory without giving a fixed address in the
instruction. This is done by using File Select Registers
(FSRs) as pointers to the locations to be read or written
to. Since the FSRs are themselves located in RAM as
SFRs, they can also be directly manipulated under
program control. This makes FSRs very useful in
implementing data structures such as tables and arrays
in data memory.
The registers for Indirect Addressing are also
implemented with Indirect File Operands (INDFs) that
permit automatic manipulation of the pointer value with
auto-incrementing, auto-decrementing or offsetting
with another value. This allows for efficient code using
loops, such as the example of clearing an entire RAM
bank in Example 6-5. It also enables users to perform
Indexed Addressing and other Stack Pointer
operations for program memory in data memory.
EXAMPLE 6-5: HOW TO CLEAR RAM
(BANK 1) USING INDIRECT
ADDRESSING
Note: The execution of some instructions in the
core PIC18 instruction set are changed
when the PIC18 extended instruction set is
enabled. See Section 6.6 “Data Memory
and the Extended Instruction Set” for
more information.
LFSR FSR0, 0x100;
NEXT CLRF POSTINC0 ; Clear INDF
; register then
; inc pointer
BTFSS FSR0H, 1 ; All done with
; Bank1?
BRA NEXT ; NO, clear next
CONTINUE ; YES, continue
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6.4.3.1 FSR Registers and the INDF
Operand (INDF)
At the core of Indirect Addressing are three sets of
registers: FSR0, FSR1 and FSR2. Each represents a
pair of 8-bit registers, FSRnH and FSRnL. The four
upper bits of the FSRnH register are not used, so each
FSR pair holds a 12-bit value. This represents a value
that can address the entire range of the data memory
in a linear fashion. The FSR register pairs, then, serve
as pointers to data memory locations.
Indirect Addressing is accomplished with a set of INDF
operands: INDF0 through INDF2. These can be pre-
sumed as “virtual” registers; they are mapped in the
SFR space but are not physically implemented. Read-
ing or writing to a particular INDF register actually
accesses its corresponding FSR register pair. A read
from INDF1, for example, reads the data at the address
indicated by FSR1H:FSR1L. Instructions that use the
INDF registers as operands actually use the contents
of their corresponding FSR as a pointer to the instruc-
tion’s target. The INDF operand is just a convenient
way of using the pointer.
Because Indirect Addressing uses a full 12-bit address,
data RAM banking is not necessary. Thus, the current
contents of the BSR and the Access RAM bit have no
effect on determining the target address.
FIGURE 6-8: INDIRECT ADDRESSING
FSR1H:FSR1L
0
7
Data Memory
000h
100h
200h
300h
F00h
E00h
FFFh
Bank 0
Bank 1
Bank 2
Bank 14
Bank 15
Bank 3
through
Bank 13
ADDWF, INDF1, 1
07
Using an instruction with one of the
Indirect Addressing registers as the
operand....
...uses the 12-bit address stored in
the FSR pair associated with that
register....
...to determine the data memory
location to be used in that operation.
In this case, the FSR1 pair contains
FCCh. This means the contents of
location, FCCh, will be added to that
of the W register and stored back in
FCCh.
xxxx1111 11001100
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6.4.3.2 FSR Registers and POSTINC,
POSTDEC, PREINC and PLUSW
In addition to the INDF operand, each FSR register pair
also has four additional indirect operands. Like INDF,
these are “virtual” registers that cannot be indirectly
read or written to. Accessing these registers actually
accesses the associated FSR register pair, but also
performs a specific action on its stored value. They are:
• POSTDEC: accesses the FSR value, then
automatically decrements it by one thereafter
• POSTINC: accesses the FSR value, then
automatically increments it by one thereafter
• PREINC: increments the FSR value by one, then
uses it in the operation
• PLUSW: adds the signed value of the W register
(range of -128 to +127) to that of the FSR and
uses the new value in the operation
In this context, accessing an INDF register uses the
value in the FSR registers without changing them.
Similarly, accessing a PLUSW register gives the FSR
value offset by the value in the W register; neither value
is actually changed in the operation. Accessing the
other virtual registers changes the value of the FSR
registers.
Operations on the FSRs with POSTDEC, POSTINC
and PREINC affect the entire register pair; that is, roll-
overs of the FSRnL register from FFh to 00h carry over
to the FSRnH register. On the other hand, results of
these operations do not change the value of any flags
in the STATUS register (e.g., Z, N, OV, etc.).
The PLUSW register can be used to implement a form
of Indexed Addressing in the data memory space. By
manipulating the value in the W register, users can
reach addresses that are fixed offsets from pointer
addresses. In some applications, this can be used to
implement some powerful program control structure,
such as software stacks, inside of data memory.
6.4.3.3 Operations by FSRs on FSRs
Indirect Addressing operations that target other FSRs
or virtual registers represent special cases. For
example, using an FSR to point to one of the virtual
registers will not result in successful operations. As a
specific case, assume that FSR0H:FSR0L contains
FE7h, the address of INDF1. Attempts to read the
value of the INDF1, using INDF0 as an operand, will
return 00h. Attempts to write to INDF1, using INDF0 as
the operand, will result in a NOP.
On the other hand, using the virtual registers to write to
an FSR pair may not occur as planned. In these cases,
the value will be written to the FSR pair but without any
incrementing or decrementing. Thus, writing to INDF2
or POSTDEC2 will write the same value to the
FSR2H:FSR2L.
Since the FSRs are physical registers mapped in the
SFR space, they can be manipulated through all direct
operations. Users should proceed cautiously when
working on these registers, particularly if their code
uses Indirect Addressing.
Similarly, operations by Indirect Addressing are gener-
ally permitted on all other SFRs. Users should exercise
appropriate caution that they do not inadvertently
change settings that might affect the operation of the
device.
6.5 Program Memory and the
Extended Instruct ion Set
The operation of program memory is unaffected by the
use of the extended instruction set.
Enabling the extended instruction set adds five
additional two-word commands to the existing PIC18
instruction set: ADDFSR, CALLW, MOVSF, MOVSS and
SUBFSR. These instructions are executed as described
in Section 6.2.4 “Two-Word Instructions”.
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6.6 Data Memory and the Extended
Instruction Set
Enabling the PIC18 extended instruction set (XINST
Configuration bit = 1) significantly changes certain
aspects of data memory and its addressing. Specifically,
the use of the Access Bank for many of the core PIC18
instructions is different. This is due to the introduction of
a new addressing mode for the data memory space.
This mode also alters the behavior of Indirect
Addressing using FSR2 and its associated operands.
What does not change is just as important. The size of
the data memory space is unchanged, as well as its
linear addressing. The SFR map remains the same.
Core PIC18 instructions can still operate in both Direct
and Indirect Addressing mode; inherent and literal
instructions do not change at all. Indirect Addressing
with FSR0 and FSR1 also remains unchanged.
6.6.1 INDEXED ADDRESSING WITH
LITERAL OFFSET
Enabling the PIC18 extended instruction set changes
the behavior of Indirect Addressing using the FSR2
register pair and its associated file operands. Under
proper conditions, instructions that use the Access
Bank, that is, most bit and byte-oriented instructions,
can invoke a form of Indexed Addressing using an
offset specified in the instruction. This special address-
ing mode is known as Indexed Addressing with Literal
Offset or Indexed Literal Offset mode.
When using the extended instruction set, this
addressing mode requires the following:
• The use of the Access Bank is forced (‘a’ = 0);
and
• The file address argument is less than or equal to
5Fh.
Under these conditions, the file address of the
instruction is not interpreted as the lower byte of an
address (used with the BSR in Direct Addressing) or as
an 8-bit address in the Access Bank. Instead, the value
is interpreted as an offset value to an Address Pointer
specified by FSR2. The offset and the contents of
FSR2 are added to obtain the target address of the
operation.
6.6.2 INSTRUCTIONS AFFECTED BY
INDEXED LITERAL OFFSET MODE
Any of the core PIC18 instructions that can use Direct
Addressing are potentially affected by the Indexed
Literal Offset Addressing mode. This includes all byte
and bit-oriented instructions, or almost one half of the
standard PIC18 instruction set. Instructions that only
use Inherent or Literal Addressing modes are
unaffected.
Additionally, byte and bit-oriented instructions are not
affected if they do not use the Access Bank (Access
RAM bit is ‘1’) or include a file address of 60h or above.
Instructions meeting these criteria will continue to
execute as before. A comparison of the different
possible addressing modes when the extended
instruction set is enabled is provided in Figure 6-9.
Those who desire to use byte or bit-oriented instruc-
tions in the Indexed Literal Offset mode should note the
changes to assembler syntax for this mode. This is
described in more detail in Sect i o n 28 . 2. 1 “ E xt e nd ed
Instruction Syntax”.
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FIGURE 6-9: COMPARING ADDRESSING OPTIONS FOR BIT-ORIENTED AND BYTE-ORIENTED
INSTRUCTIONS (EXTENDED INSTRUCTION SET ENABLED)
Example Instruction: ADDWF, f, d, a (Opcode: 0010 01da ffff ffff)
When a = 0 and f 60h:
The instruction executes in
Direct Forced mode. ‘f’ is
interpreted as a location in the
Access RAM between 060h
and FFFh. This is the same as
locations, F60h to FFFh
(Bank 15), of data memory.
Locations below 060h are not
available in this addressing
mode.
When a = 0 and f 5Fh:
The instruction executes in
Indexed Literal Offset mode. ‘f’
is interpreted as an offset to the
address value in FSR2. The
two are added together to
obtain the address of the target
register for the instruction. The
address can be anywhere in
the data memory space.
Note that in this mode, the
correct syntax is:
ADDWF [k], d
where ‘k’ is the same as ‘f’.
When a = 1 (all values of f):
The instruction executes in
Direct mode (also known as
Direct Long mode). ‘f’ is
interpreted as a location in
one of the 16 banks of the data
memory space. The bank is
designated by the Bank Select
Register (BSR). The address
can be in any implemented
bank in the data memory
space.
000h
060h
100h
F00h
F60h
FFFh
Valid Range
00h
60h
FFh
Data Memory
Access RAM
Bank 0
Bank 1
through
Bank 14
Bank 15
SFRs
000h
060h
100h
F00h
F60h
FFFh
Data Memory
Bank 0
Bank 1
through
Bank 14
Bank 15
SFRs
FSR2H FSR2L
ffffffff001001da
ffffffff001001da
000h
060h
100h
F00h
F60h
FFFh
Data Memory
Bank 0
Bank 1
through
Bank 14
Bank 15
SFRs
for ‘f’
BSR
00000000
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6.6.3 MAPPING THE ACCESS BANK IN
INDEXED LITERAL OFFSET MODE
The use of Indexed Literal Offset Addressing mode
effectively changes how the lower part of Access RAM
(00h to 5Fh) is mapped. Rather than containing just the
contents of the bottom part of Bank 0, this mode maps
the contents from Bank 0 and a user-defined “window”
that can be located anywhere in the data memory
space. The value of FSR2 establishes the lower
boundary of the addresses mapped to the window,
while the upper boundary is defined by FSR2 plus 95
(5Fh). Addresses in the Access RAM above 5Fh are
mapped as previously described (see Section 6.3.2
“Access Bank”). Figure 6-10 provides an example of
Access Bank remapping in this addressing mode.
Remapping of the Access Bank applies only to opera-
tions using the Indexed Literal Offset mode. Operations
that use the BSR (Access RAM bit is ‘1’) will continue
to use Direct Addressing as before. Any Indirect or
Indexed Addressing operation that explicitly uses any
of the indirect file operands (including FSR2) will con-
tinue to operate as standard Indirect Addressing. Any
instruction that uses the Access Bank, but includes a
register address of greater than 05Fh, will use Direct
Addressing and the normal Access Bank map.
6.6.4 BSR IN INDEXED LITERAL OFFSET
MODE
Although the Access Bank is remapped when the
extended instruction set is enabled, the operation of the
BSR remains unchanged. Direct Addressing, using the
BSR to select the data memory bank, operates in the
same manner as previously described.
FIGURE 6-10: REMAPPING THE ACCESS BANK WITH INDEXED LITERAL OFFSET ADDRESSING
Data Memory
000h
100h
200h
F60h
F00h
FFFh
Bank 1
Bank 15
Bank 2
through
Bank 14
SFRs
05Fh
ADDWF f, d, a
FSR2H:FSR2L = 120h
Locations in the region
from the FSR2 Pointer
(120h) to the pointer plus
05Fh (17Fh) are mapped
to the bottom of the
Access RAM (000h-05Fh).
Special Function Registers
at F60h through FFFh are
mapped to 60h through
FFh, as usual.
Bank 0 addresses below
5Fh are not available in
this mode. They can still
be addressed by using the
BSR.
Access Bank
00h
FFh
Bank 0
SFRs
Bank 1 “Window”
Not Accessible
Window
Example Situation:
120h
17Fh
5Fh
60h
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7.0 FLASH PROGRAM MEMORY
The Flash program memory is readable, writable and
erasable during normal operation over the entire VDD
range.
A read from program memory is executed on 1 byte at
a time. A write to program memory is executed on
blocks of 64 bytes at a time or 2 bytes at a time.
Program memory is erased in blocks of 1024 bytes at
a time. A bulk erase operation may not be issued from
user code.
Writing or erasing program memory will cease
instruction fetches until the operation is complete. The
program memory cannot be accessed during the write
or erase, therefore, code cannot execute. An internal
programming timer terminates program memory writes
and erases.
A value written to program memory does not need to be
a valid instruction. Executing a program memory
location that forms an invalid instruction results in a
NOP.
7.1 Table Reads and Table Writes
In order to read and write program memory, there are
two operations that allow the processor to move bytes
between the program memory space and the data RAM:
• Table Read (TBLRD)
• Table Write (TBLWT)
The program memory space is 16 bits wide, while the
data RAM space is 8 bits wide. Table reads and table
writes move data between these two memory spaces
through an 8-bit register (TABLAT).
Table read operations retrieve data from program
memory and place it into the data RAM space.
Figure 7-1 illustrates the operation of a table read with
program memory and data RAM.
Table write operations store data from the data memory
space into holding registers in program memory. The
procedure to write the contents of the holding registers
into program memory is detailed in Section 7.5 “W riting
to Flash Program Memory”. Figure 7-2 illustrates the
operation of a table write with program memory and data
RAM.
Table operations work with byte entities. A table block
containing data, rather than program instructions, is not
required to be word-aligned. Therefore, a table block can
start and end at any byte address. If a table write is being
used to write executable code into program memory,
program instructions will need to be word-aligned.
FIGU RE 7-1: TABLE READ O PERA TION
Table Pointer(1)
Table Latch (8-bit)
Program Memory
TBLPTRH TBLPTRL
TABLAT
TBLPTRU
Instruction: TBLRD*
Note 1: The Table Pointer register points to a byte in program memory.
Program Memory
(TBLPTR)
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FIGURE 7-2: TABLE WRI TE OPERATION
7.2 Control Registers
Several control registers are used in conjunction with
the TBLRD and TBLWT instructions. Those are:
• EECON1 register
• EECON2 register
• TABLAT register
• TBLPTR registers
7.2.1 EECON1 AND EECON2 REGISTERS
The EECON1 register (Register 7-1) is the control
register for memory accesses. The EECON2 register is
not a physical register; it is used exclusively in the
memory write and erase sequences. Reading
EECON2 will read all ‘0’s.
The WPROG bit, when set, will allow programming
two bytes per word on the execution of the WR
command. If this bit is cleared, the WR command will
result in programming on a block of 64 bytes.
The FREE bit, when set, will allow a program memory
erase operation. When FREE is set, the erase
operation is initiated on the next WR command. When
FREE is clear, only writes are enabled.
The WREN bit, when set, will allow a write operation.
On power-up, the WREN bit is clear. The WRERR bit is
set in hardware when the WR bit is set, and cleared
when the internal programming timer expires and the
write operation is complete.
The WR control bit initiates write operations. The bit
cannot be cleared, only set, in software. It is cleared in
hardware at the completion of the write operation.
Ta bl e Po i n t e r(1) Table Latch (8-bit)
TBLPTRH TBLPTRL TABLAT
Program Memory
(TBLPTR)
TBLPTRU
Instruction: TBLWT*
Note 1: The Table Pointer actually points to one of 64 holding registers, the address of which is determined by
TBLPTRL<5:0>. The process for physically writing data to the program memory array is discussed in
Section 7.5 “Writing to Flash Program Memory”.
Holding Registers
Program Memory
Note: During normal operation, the WRERR is
read as ‘1’. This can indicate that a write
operation was prematurely terminated by
a Reset or a write operation was
attempted improperly.
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REGISTER 7-1: EECON1: EEPROM CONTROL REGISTER 1 (ACCESS FA6h)
U-0 U-0 R/W-0 R/W-0 R/W-x R/W-0 R/S-0 U-0
—— WPROG FREE WRERR WREN WR —
bit 7 bit 0
Legend: S = Settable bit (cannot be cleared in software)
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-6 Unimplemented: Read as ‘0’
bit 5 WPROG: One Word-Wide Program bit
1 = Program 2 bytes on the next WR command
0 = Program 64 bytes on the next WR command
bit 4 FREE: Flash Erase Enable bit
1 = Perform an erase operation on the next WR command (cleared by hardware after completion of erase)
0 = Perform write-only
bit 3 WRERR: Flash Program Error Flag bit
1 = A write operation is prematurely terminated (any Reset during self-timed programming in normal
operation or an improper write attempt)
0 = The write operation completed
bit 2 WREN: Flash Program Write Enable bit
1 = Allows write cycles to Flash program memory
0 = Inhibits write cycles to Flash program memory
bit 1 WR: Write-Control bit
1 = Initiates a program memory erase cycle or write cycle
(The operation is self-timed and the bit is cleared by hardware once the write is complete. The WR
bit can only be set (not cleared) in software.)
0 = Write cycle is complete
bit 0 Unimplemented: Read as ‘0’
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7.2.2 TABLE LATCH REGISTER (TABLAT)
The Table Latch (TABLAT) is an 8-bit register mapped
into the Special Function Register (SFR) space. The
Table Latch register is used to hold 8-bit data during
data transfers between program memory and data
RAM.
7.2.3 TABLE POINTER REGISTER
(TBLPTR)
The Table Pointer (TBLPTR) register addresses a byte
within the program memory. The TBLPTR comprises
three SFR registers: Table Pointer Upper Byte, Table
Pointer High Byte and Table Pointer Low Byte
(TBLPTRU:TBLPTRH:TBLPTRL). These three registers
join to form a 22-bit wide pointer. The low-order 21 bits
allow the device to address up to 2 Mbytes of program
memory space. The 22nd bit allows access to the Device
ID, the User ID and the Configuration bits.
The Table Pointer register, TBLPTR, is used by the
TBLRD and TBLWT instructions. These instructions can
update the TBLPTR in one of four ways based on the
table operation.
Table 7-1 displays these operations. On the TBLPTRT,
these operations only affect the low-order 21 bits.
7.2.4 TABLE POINTER BOUNDARIES
TBLPTR is used in reads, writes and erases of the
Flash program memory.
When a TBLRD is executed, all 22 bits of the TBLPTR
determine which byte is read from program memory
into TABLAT.
When a TBLWT is executed, the seven Least Significant
bits (LSbs) of the Table Pointer register (TBLPTR<6:0>)
determine which of the 64 program memory holding
registers is written to. When the timed write to program
memory begins (via the WR bit), the 12 Most Significant
bits (MSbs) of the TBLPTR (TBLPTR<21:10>)
determine which program memory block of 1024 bytes
is written to. For more information, see Section 7.5
“Writing to Flash Program Memory”.
When an erase of program memory is executed, the
12 MSbs of the Table Pointer register point to the
1024-byte block that will be erased. The LSbs are
ignored.
Figure 7-3 illustrates the relevant boundaries of the
TBLPTR based on Flash program memory operations.
TABLE 7-1: TABLE POINTER OPERATIONS WITH TBLRD AND TBLWT INSTRUCTIONS
FIGURE 7-3: TABLE POINTER BOUNDARIES BASED ON OPERATION
Example Operation on Table Pointer
TBLRD*
TBLWT* TBLPTR is not modified
TBLRD*+
TBLWT*+ TBLPTR is incremented after the read/write
TBLRD*-
TBLWT*- TBLPTR is decremented after the read/write
TBLRD+*
TBLWT+* TBLPTR is incremented before the read/write
21 16 15 87 0
ERASE: TB LPTR<20:1 0 >
TABLE WRITE: TBLPTR<20:6>
TABLE READ: TBLPTR<21:0>
TBLPTRL
TBLPTRH
TBLPTRU
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7.3 Reading the Flash Program
Memory
The TBLRD instruction is used to retrieve data from
program memory and places it into data RAM. Table
reads from program memory are performed one byte at
a time.
The TBLPTR points to a byte address in program
space. Executing TBLRD places the byte pointed to into
TABLAT. In addition, the TBLPTR can be modified
automatically for the next table read operation.
The internal program memory is typically organized by
words. The LSb of the address selects between the high
and low bytes of the word.
Figure 7-4 illustrates the interface between the internal
program memory and the TABLAT.
FIGURE 7-4: READS FROM FLASH PROGRAM MEMORY
EXAMPLE 7-1: READING A FLASH PROGRAM MEMORY WORD
(Even Byte Address)
Program Memory
(Odd Byte Address)
TBLRD TABLAT
TBLPTR = xxxxx1
FETCH
Instruction Register
(IR) Read Register
TBLPTR = xxxxx0
MOVLW CODE_ADDR_UPPER ; Load TBLPTR with the base
MOVWF TBLPTRU ; address of the word
MOVLW CODE_ADDR_HIGH
MOVWF TBLPTRH
MOVLW CODE_ADDR_LOW
MOVWF TBLPTRL
READ_WORD TBLRD*+ ; read into TABLAT and increment
MOVF TABLAT, W ; get data
MOVWF WORD_EVEN
TBLRD*+ ; read into TABLAT and increment
MOVF TABLAT, W ; get data
MOVWF WORD_ODD
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7.4 Erasing Flash Program Memory
The minimum erase block is 512 words or 1024 bytes.
Only through the use of an external programmer, or
through ICSP control, can larger blocks of program
memory be bulk erased. Word erase in the Flash array
is not supported.
When initiating an erase sequence from the micro-
controller itself, a block of 1024 bytes of program
memory is erased. The Most Significant 12 bits of the
TBLPTR<21:10> point to the block being erased;
TBLPTR<9:0> are ignored.
The EECON1 register commands the erase operation.
The WREN bit must be set to enable write operations.
The FREE bit is set to select an erase operation. For
protection, the write initiate sequence for EECON2
must be used.
A long write is necessary for erasing the internal Flash.
Instruction execution is Halted while in a long write
cycle. The long write will be terminated by the internal
programming timer.
7.4.1 FLASH PROGRAM MEMORY
ERASE SEQUENCE
The sequence of events for erasing a block of internal
program memory location is:
1. Load Table Pointer register with address of row
being erased.
2. Set the WREN and FREE bits (EECON1<2,4>)
to enable the erase operation.
3. Disable interrupts.
4. Write 55h to EECON2.
5. Write 0AAh to EECON2.
6. Set the WR bit; this will begin the erase cycle.
7. The CPU will stall for the duration of the erase
for TIE (see parameter D133B).
8. Re-enable interrupts.
EXAMPLE 7-2: ERASING FLASH PROGRAM MEMORY
MOVLW CODE_ADDR_UPPER ; load TBLPTR with the base
MOVWF TBLPTRU ; address of the memory block
MOVLW CODE_ADDR_HIGH
MOVWF TBLPTRH
MOVLW CODE_ADDR_LOW
MOVWF TBLPTRL
ERASE_ROW BSF EECON1, WREN ; enable write to memory
BSF EECON1, FREE ; enable Erase operation
BCF INTCON, GIE ; disable interrupts
Required MOVLW 0x55
Sequence MOVWF EECON2 ; write 55h
MOVLW 0xAA
MOVWF EECON2 ; write 0AAh
BSF EECON1, WR ; start erase (CPU stall)
BSF INTCON, GIE ; re-enable interrupts
2010 Microchip Technology Inc. Preliminary DS39974A-page 113
PIC18F47J13 FAMILY
7.5 Writing to Flash Program Memory
The programming block is 32 words or 64 bytes.
Programming one word or 2 bytes at a time is also
supported.
Table writes are used internally to load the holding
registers needed to program the Flash memory. There
are 64 holding registers used by the table writes for
programming.
Since the Table Latch (TABLAT) is only a single byte, the
TBLWT instruction may need to be executed 64 times for
each programming operation (if WPROG = 0). All of the
table write operations will essentially be short writes
because only the holding registers are written. At the
end of updating the 64 holding registers, the EECON1
register must be written to in order to start the
programming operation with a long write.
The long write is necessary for programming the
internal Flash. Instruction execution is Halted while in a
long write cycle. The long write will be terminated by
the internal programming timer.
The on-chip timer controls the write time. The
write/erase voltages are generated by an on-chip
charge pump, rated to operate over the voltage range
of the device.
FIGURE 7-5: TABLE WRITES TO FLASH PROGRAM MEMORY
7.5.1 FLASH PROGRAM MEMORY WRITE
SEQUENCE
The sequence of events for programming an internal
program memory location should be:
1. Read 1024 bytes into RAM.
2. Update data values in RAM as necessary.
3. Load the Table Pointer register with address
being erased.
4. Execute the erase procedure.
5. Load the Table Pointer register with the address
of the first byte being written, minus 1.
6. Write the 64 bytes into the holding registers with
auto-increment.
7. Set the WREN bit (EECON1<2>) to enable byte
writes.
8. Disable interrupts.
9. Write 55h to EECON2.
10. Write 0AAh to EECON2.
11. Set the WR bit; this will begin the write cycle.
12. The CPU will stall for the duration of the write for
TIW (see parameter D133A).
13. Re-enable interrupts.
14. Repeat Steps 6 through 13 until all 1024 bytes
are written to program memory.
15. Verify the memory (table read).
An example of the required code is provided in
Example 7-3 on the following page.
Note 1: Unlike previous PIC® devices, devices of
the PIC18F47J13 family do not reset the
holding registers after a write occurs. The
holding registers must be cleared or
overwritten before a programming
sequence.
2: To maintain the endurance of the program
memory cells, each Flash byte should not
be programmed more than once between
erase operations. Before attempting to
modify the contents of the target cell a
second time, an erase of the target page,
or a bulk erase of the entire memory, must
be performed.
TABLAT
TBLPTR = xxxx3FTBLPTR = xxxxx1TBLPTR = xxxxx0
Write Register
TBLPTR = xxxxx2
Program Memory
Holding Register Holding Register Holding Register Holding Register
88 8 8
Note: Before setting the WR bit, the Table
Pointer address needs to be within the
intended address range of the 64 bytes in
the holding register.
PIC18F47J13 FAMILY
DS39974A-page 114 Preliminary 2010 Microchip Technology Inc.
EXAMPLE 7-3: W RITING TO FLASH PROGRAM MEMORY
MOVLW CODE_ADDR_UPPER ; Load TBLPTR with the base address
MOVWF TBLPTRU ; of the memory block, minus 1
MOVLW CODE_ADDR_HIGH
MOVWF TBLPTRH
MOVLW CODE_ADDR_LOW
MOVWF TBLPTRL
ERASE_BLOCK BSF EECON1, WREN ; enable write to memory
BSF EECON1, FREE ; enable Erase operation
BCF INTCON, GIE ; disable interrupts
MOVLW 0x55
MOVWF EECON2 ; write 55h
MOVLW 0xAA
MOVWF EECON2 ; write 0AAh
BSF EECON1, WR ; start erase (CPU stall)
BSF INTCON, GIE ; re-enable interrupts
MOVLW D'16'
MOVWF WRITE_COUNTER ; Need to write 16 blocks of 64 to write
; one erase block of 1024
RESTART_BUFFER MOVLW D'64'
MOVWF COUNTER
MOVLW BUFFER_ADDR_HIGH ; point to buffer
MOVWF FSR0H
MOVLW BUFFER_ADDR_LOW
MOVWF FSR0L
FILL_BUFFER ... ; read the new data from I2C, SPI,
; PSP, USART, etc.
WRITE_BUFFER MOVLW D'64' ; number of bytes in holding register
MOVWF COUNTER
WRITE_BYTE_TO_HREGSMOVFF POSTINC0, WREG ; get low byte of buffer data
MOVWF TABLAT ; present data to table latch
TBLWT+* ; write data, perform a short write
; to internal TBLWT holding register.
DECFSZ COUNTER ; loop until buffers are full
BRA WRITE_BYTE_TO_HREGS
PROGRAM_MEMORY BSF EECON1, WREN ; enable write to memory
BCF INTCON, GIE ; disable interrupts
MOVLW 0x55
Required MOVWF EECON2 ; write 55h
Sequence MOVLW 0xAA
MOVWF EECON2 ; write 0AAh
BSF EECON1, WR ; start program (CPU stall)
BSF INTCON, GIE ; re-enable interrupts
BCF EECON1, WREN ; disable write to memory
DECFSZ WRITE_COUNTER ; done with one write cycle
BRA RESTART_BUFFER ; if not done replacing the erase block
2010 Microchip Technology Inc. Preliminary DS39974A-page 115
PIC18F47J13 FAMILY
7.5.2 FLASH PROGRAM MEMORY WRITE
SEQUENCE (WORD
PROGRAMMING)
The PIC18F47J13 family of devices has a feature that
allows programming a single word (two bytes). This
feature is enabled when the WPROG bit is set. If the
memory location is already erased, the following
sequence is required to enable this feature:
1. Load the Table Pointer register with the address
of the data to be written. (It must be an even
address.)
2. Write the 2 bytes into the holding registers by
performing table writes. (Do not post-increment
on the second table write.)
3. Set the WREN bit (EECON1<2>) to enable
writes and the WPROG bit (EECON1<5>) to
select Word Write mode.
4. Disable interrupts.
5. Write 55h to EECON2.
6. Write 0AAh to EECON2.
7. Set the WR bit; this will begin the write cycle.
8. The CPU will stall for the duration of the write for
TIW (see parameter D133A).
9. Re-enable interrupts.
EXAMPLE 7-4: SINGLE-WORD WRITE TO FLASH PROGRAM MEMOR Y
MOVLW CODE_ADDR_UPPER ; Load TBLPTR with the base address
MOVWF TBLPTRU
MOVLW CODE_ADDR_HIGH
MOVWF TBLPTRH
MOVLW CODE_ADDR_LOW ; The table pointer must be loaded with an even
address
MOVWF TBLPTRL
MOVLW DATA0 ; LSB of word to be written
MOVWF TABLAT
TBLWT*+
MOVLW DATA1 ; MSB of word to be written
MOVWF TABLAT
TBLWT* ; The last table write must not increment the table
pointer! The table pointer needs to point to the
MSB before starting the write operation.
PROGRAM_MEMORY BSF EECON1, WPROG ; enable single word write
BSF EECON1, WREN ; enable write to memory
BCF INTCON, GIE ; disable interrupts
MOVLW 0x55
Required MOVWF EECON2 ; write 55h
Sequence MOVLW 0xAA
MOVWF EECON2 ; write AAh
BSF EECON1, WR ; start program (CPU stall)
BSF INTCON, GIE ; re-enable interrupts
BCF EECON1, WPROG ; disable single word write
BCF EECON1, WREN ; disable write to memory
PIC18F47J13 FAMILY
DS39974A-page 116 Preliminary 2010 Microchip Technology Inc.
7.5.3 WRITE VERIFY
Depending on the application, good programming
practice may dictate that the value written to the
memory should be verified against the original value.
This should be used in applications where excessive
writes can stress bits near the specification limit.
7.5.4 UNEXPECTED TERMINATION OF
WRITE OPERATION
If a write is terminated by an unplanned event, such as
loss of power or an unexpected Reset, the memory
location just programmed should be verified and
reprogrammed if needed. If the write operation is
interrupted by a MCLR Reset, or a WDT time-out Reset
during normal operation, the user can check the
WRERR bit and rewrite the location(s) as needed.
7.6 Flash Program Operation Duri ng
Code Protection
See Section 27.6 “Program Verification and Code
Protection” for details on code protection of Flash
program memory.
TABLE 7-2: REGISTERS ASSOCIATED WITH PROGRAM FLASH MEMORY
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
TBLPTRU —— bit 21 Program Memory Table Pointer Upper Byte (TBLPTR<20:16>)
TBPLTRH Program Memory Table Pointer High Byte (TBLPTR<15:8>)
TBLPTRL Program Memory Table Pointer Low Byte (TBLPTR<7:0>)
TABLAT Program Memory Table Latch
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF
EECON2 Program Memory Control Register 2 (not a physical register)
EECON1 —— WPROG FREE WRERR WREN WR —
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used during Flash program memory access.
2010 Microchip Technology Inc. Preliminary DS39974A-page 117
PIC18F47J13 FAMILY
8.0 8 x 8 HARDWARE MULTIPLIER
8.1 Introduction
All PIC18 devices include an 8 x 8 hardware multiplier
as part of the ALU. The multiplier performs an unsigned
operation and yields a 16-bit result that is stored in the
product register pair, PRODH:PRODL. The multiplier’s
operation does not affect any flags in the STATUS
register.
Making multiplication a hardware operation allows it to
be completed in a single instruction cycle. This has the
advantages of higher computational throughput and
reduced code size for multiplication algorithms and
allows the PIC18 devices to be used in many applica-
tions previously reserved for digital signal processors.
Table 8-1 provides a comparison of various hardware
and software multiply operations, along with the
savings in memory and execution time.
8.2 Operation
Example 8-1 provides the instruction sequence for an
8 x 8 unsigned multiplication. Only one instruction is
required when one of the arguments is already loaded
in the WREG register.
Example 8-2 provides the instruction sequence for an
8 x 8 signed multiplication. To account for the sign bits
of the arguments, each argument’s Most Significant bit
(MSb) is tested and the appropriate subtractions are
done.
EXAMPLE 8-1: 8 x 8 UNSIGNED MULTIPLY
ROUTIN E
EXAMPLE 8-2: 8 x 8 SIGNED MULTIP LY
ROUTINE
TABLE 8-1: PERFORMANCE COMPARISON FOR VARIOUS MULTIPLY OPERATIONS
MOVF ARG1, W ;
MULWF ARG2 ; ARG1 * ARG2 ->
; PRODH:PRODL
MOVF ARG1, W
MULWF ARG2 ; ARG1 * ARG2 ->
; PRODH:PRODL
BTFSC ARG2, SB ; Test Sign Bit
SUBWF PRODH, F ; PRODH = PRODH
; - ARG1
MOVF ARG2, W
BTFSC ARG1, SB ; Test Sign Bit
SUBWF PRODH, F ; PRODH = PRODH
; - ARG2
Routine Multiply Method Program
Memory
(Words)
Cycles
(Max)
Time
@ 48 MHz @ 10 MHz @ 4 MHz
8 x 8 unsigned Without hardware multiply 13 69 5.7 s27.6 s69 s
Hardware multiply 1 1 83.3 ns 400 ns 1 s
8 x 8 signed Without hardware multiply 33 91 7.5 s36.4 s91 s
Hardware multiply 6 6 500 ns 2.4 s6 s
16 x 16 unsigned Without hardware multiply 21 242 20.1 s96.8 s242 s
Hardware multiply 28 28 2.3 s 11.2 s28 s
16 x 16 signed Without hardware multiply 52 254 21.6 s 102.6 s254 s
Hardware multiply 35 40 3.3 s16.0 s40 s
PIC18F47J13 FAMILY
DS39974A-page 118 Preliminary 2010 Microchip Technology Inc.
Example 8-3 provides the instruction sequence for a
16 x 16 unsigned multiplication. Equation 8-1 provides
the algorithm that is used. The 32-bit result is stored in
four registers (RES3:RES0).
EQUATION 8-1: 16 x 16 UNSIGNED
MULTIPLICATION
ALGORITHM
EXAMPLE 8-3: 16 x 16 UNSIGN ED
MULTIPLY ROUTINE
Example 8-4 provides the sequence to do a 16 x 16
signed multiply. Equation 8-2 provides the algorithm
used. The 32-bit result is stored in four registers
(RES3:RES0). To account for the sign bits of the
arguments, the MSb for each argument pair is tested
and the appropriate subtractions are done.
EQUATION 8-2: 16 x 16 SIGNED
MULTIPLICATION
ALGORITHM
EXAMPLE 8-4: 16 x 1 6 S IGNE D MULT IP LY
ROUTINE
RES3:RES0 = ARG1H:ARG1L · ARG2H:ARG2L
= (ARG1H · ARG2H · 216) +
(ARG1H · ARG2L · 28) +
(ARG1L · ARG2H · 28) +
(ARG1L · ARG2L)
MOVF ARG1L, W
MULWF ARG2L ; ARG1L * ARG2L->
; PRODH:PRODL
MOVFF PRODH, RES1 ;
MOVFF PRODL, RES0 ;
MOVF ARG1H, W
MULWF ARG2H ; ARG1H * ARG2H->
; PRODH:PRODL
MOVFF PRODH, RES3 ;
MOVFF PRODL, RES2 ;
MOVF ARG1L, W
MULWF ARG2H ; ARG1L * ARG2H->
; PRODH:PRODL
MOVF PRODL, W ;
ADDWF RES1, F ; Add cross
MOVF PRODH, W ; products
ADDWFC RES2, F ;
CLRF WREG ;
ADDWFC RES3, F ;
MOVF ARG1H, W ;
MULWF ARG2L ; ARG1H * ARG2L->
; PRODH:PRODL
MOVF PRODL, W ;
ADDWF RES1, F ; Add cross
MOVF PRODH, W ; products
ADDWFC RES2, F ;
CLRF WREG ;
ADDWFC RES3, F ;
RES3:RES0 = ARG1H:ARG1L · ARG2H:ARG2L
= (ARG1H · ARG2H · 216) +
(ARG1H · ARG2L · 28) +
(ARG1L · ARG2H · 28) +
(ARG1L · ARG2L) +
(-1 · ARG2H<7> · ARG1H:ARG1L · 216) +
(-1 · ARG1H<7> · ARG2H:ARG2L · 216)
MOVF ARG1L, W
MULWF ARG2L ; ARG1L * ARG2L ->
; PRODH:PRODL
MOVFF PRODH, RES1 ;
MOVFF PRODL, RES0 ;
MOVF ARG1H, W
MULWF ARG2H ; ARG1H * ARG2H ->
; PRODH:PRODL
MOVFF PRODH, RES3 ;
MOVFF PRODL, RES2 ;
MOVF ARG1L, W
MULWF ARG2H ; ARG1L * ARG2H ->
; PRODH:PRODL
MOVF PRODL, W ;
ADDWF RES1, F ; Add cross
MOVF PRODH, W ; prod ucts
ADDWFC RES2, F ;
CLRF WREG ;
ADDWFC RES3, F ;
MOVF ARG1H, W ;
MULWF ARG2L ; ARG1H * ARG2L ->
; PRODH:PRODL
MOVF PRODL, W ;
ADDWF RES1, F ; Add cross
MOVF PRODH, W ; prod ucts
ADDWFC RES2, F ;
CLRF WREG ;
ADDWFC RES3, F ;
BTFSS ARG2H, 7 ; ARG2H:ARG2L neg?
BRA SIGN_ARG1 ; no, check ARG1
MOVF ARG1L, W ;
SUBWF RES2 ;
MOVF ARG1H, W ;
SUBWFB RES3
SIGN_ARG1
BTFSS ARG1H, 7 ; ARG1H:ARG1L neg?
BRA CONT_CODE ; no, done
MOVF ARG2L, W ;
SUBWF RES2 ;
MOVF ARG2H, W ;
SUBWFB RES3
CONT_CODE
:
2010 Microchip Technology Inc. Preliminary DS39974A-page 119
PIC18F47J13 FAMILY
9.0 INTERRUPTS
Devices of the PIC18F47J13 family have multiple inter-
rupt sources and an interrupt priority feature that allows
most interrupt sources to be assigned a high-priority
level or a low-priority level. The high-priority interrupt
vector is at 0008h and the low-priority interrupt vector
is at 0018h. High-priority interrupt events will interrupt
any low-priority interrupts that may be in progress.
There are 19 registers, which are used to control
interrupt operation. These registers are:
• RCON
•INTCON
• INTCON2
• INTCON3
• PIR1, PIR2, PIR3, PIR4, PIR5
• PIE1, PIE2, PIE3, PIE4, PIE5
• IPR1, IPR2, IPR3, IPR4, IPR5
It is recommended that the Microchip header files
supplied with MPLAB® IDE be used for the symbolic bit
names in these registers. This allows the
assembler/compiler to automatically take care of the
placement of these bits within the specified register.
In general, interrupt sources have three bits to control
their operation. They are:
•Flag bit to indicate that an interrupt event
occurred
•Enable bit that allows program execution to
branch to the interrupt vector address when the
flag bit is set
•Priority bit to select high priority or low priority
The interrupt priority feature is enabled by setting the
IPEN bit (RCON<7>). When interrupt priority is
enabled, there are two bits which enable interrupts
globally. Setting the GIEH bit (INTCON<7>) enables all
interrupts that have the priority bit set (high priority).
Setting the GIEL bit (INTCON<6>) enables all
interrupts that have the priority bit cleared (low priority).
When the interrupt flag, enable bit and appropriate
global interrupt enable bit are set, the interrupt will
vector immediately to address, 0008h or 0018h,
depending on the priority bit setting. Individual
interrupts can be disabled through their corresponding
enable bits.
When the IPEN bit is cleared (default state), the
interrupt priority feature is disabled and interrupts are
compatible with PIC® mid-range devices. In
Compatibility mode, the interrupt priority bits for each
source have no effect. INTCON<6> is the PEIE bit,
which enables/disables all peripheral interrupt sources.
INTCON<7> is the GIE bit, which enables/disables all
interrupt sources. All interrupts branch to address
0008h in Compatibility mode.
When an interrupt is responded to, the global interrupt
enable bit is cleared to disable further interrupts. If the
IPEN bit is cleared, this is the GIE bit. If interrupt priority
levels are used, this will be either the GIEH or GIEL bit.
High-priority interrupt sources can interrupt a
low-priority interrupt. Low-priority interrupts are not
processed while high-priority interrupts are in progress.
The return address is pushed onto the stack and the
PC is loaded with the interrupt vector address (0008h
or 0018h). Once in the Interrupt Service Routine (ISR),
the source(s) of the interrupt can be determined by poll-
ing the interrupt flag bits. The interrupt flag bits must be
cleared in software before re-enabling interrupts to
avoid recursive interrupts.
The “return from interrupt” instruction, RETFIE, exits
the interrupt routine and sets the GIE bit (GIEH or GIEL
if priority levels are used), which re-enables interrupts.
For external interrupt events, such as the INTx pins or
the PORTB input change interrupt, the interrupt latency
will be three to four instruction cycles. The exact
latency is the same for one or two-cycle instructions.
Individual interrupt flag bits are set regardless of the
status of their corresponding enable bit or the GIE bit.
Note: Do not use the MOVFF instruction to modify
any of the Interrupt Control registers while
any interrupt is enabled. Doing so may
cause erratic microcontroller behavior.
PIC18F47J13 FAMILY
DS39974A-page 120 Preliminary 2010 Microchip Technology Inc.
FIGU RE 9-1 : PIC18F 47J13 FAMIL Y INTE RR UPT LOG IC
TMR0IE
GIE/GIEH
PEIE/GIEL
Wake-up if in
Interrupt to CPU
Vector to Location
0008h
INT2IF
INT2IE
INT2IP
INT1IF
INT1IE
INT1IP
TMR0IF
TMR0IE
TMR0IP
RBIF
RBIE
RBIP
IPEN
TMR0IF
TMR0IP
INT1IF
INT1IE
INT1IP
INT2IF
INT2IE
INT2IP
RBIF
RBIE
RBIP
INT0IF
INT0IE
PEIE/GIEL
Interrupt to CPU
Vector to Location
IPEN
IPEN
0018h
PIR1<7:0>
PIE1<7:0>
IPR1<7:0>
High-Priority Interrupt Generation
Low-Priority Interrupt Generation
Idle or Sleep modes
GIE/GIEH
INT3IF
INT3IE
INT3IP
INT3IF
INT3IE
INT3IP
PIR2<7:0>
PIE2<7:0>
IPR2<7:0>
PIR3<7:0>
PIE3<7:0>
IPR3<7:0>
PIR1<7:0>
PIE1<7:0>
IPR1<7:0>
PIR2<7:0>
PIE2<7:0>
IPR2<7:0>
PIR3<7:0>
PIE3<7:0>
IPR3<7:0>
IPEN
PIR4<7:0>
PIE4<7:0>
IPR4<7:0>
PIR5<5:0>
PIE5<5:0>
IPR5<5:0>
IPR5<5:0>
PIE5<5:0>
PIR5<5:0>
IPR4<7:0>
PIE4<7:0>
PIR4<7:0>
2010 Microchip Technology Inc. Preliminary DS39974A-page 121
PIC18F47J13 FAMILY
9.1 INTCON Registers
The INTCON registers are readable and writable
registers, which contain various enable, priority and
flag bits.
Note: Interrupt flag bits are set when an interrupt
condition occurs, regardless of the state of
its corresponding enable bit or the global
interrupt enable bit. User software should
ensure the appropriate interrupt flag bits
are clear prior to enabling an interrupt.
This feature allows for software polling.
REGISTER 9-1: INTCON: INTERRUPT CONTROL REGISTER (ACCESS FF2h)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-x
GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF(1)
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 GIE/GIEH: Global Interrupt Enable bit
When IPEN = 0:
1 = Enables all unmasked interrupts
0 = Disables all interrupts
When IPEN = 1:
1 = Enables all high-priority interrupts
0 = Disables all interrupts
bit 6 PEIE/GIEL: Peripheral Interrupt Enable bit
When IPEN = 0:
1 = Enables all unmasked peripheral interrupts
0 = Disables all peripheral interrupts
When IPEN = 1:
1 = Enables all low-priority peripheral interrupts
0 = Disables all low-priority peripheral interrupts
bit 5 TMR0IE: TMR0 Overflow Interrupt Enable bit
1 = Enables the TMR0 overflow interrupt
0 = Disables the TMR0 overflow interrupt
bit 4 INT0IE: INT0 External Interrupt Enable bit
1 = Enables the INT0 external interrupt
0 = Disables the INT0 external interrupt
bit 3 RBIE: RB Port Change Interrupt Enable bit
1 = Enables the RB port change interrupt
0 = Disables the RB port change interrupt
bit 2 TMR0IF: TMR0 Overflow Interrupt Flag bit
1 = The TMR0 register has overflowed (must be cleared in software)
0 = The TMR0 register did not overflow
bit 1 INT0IF: INT0 External Interrupt Flag bit
1 = The INT0 external interrupt occurred (must be cleared in software)
0 = The INT0 external interrupt did not occur
bit 0 RBIF: RB Port Change Interrupt Flag bit(1)
1 = At least one of the RB<7:4> pins changed state (must be cleared in software)
0 = None of the RB<7:4> pins have changed state
Note 1: A mismatch condition will continue to set this bit. Reading PORTB and waiting 1 TCY will end the mismatch
condition and allow the bit to be cleared.
PIC18F47J13 FAMILY
DS39974A-page 122 Preliminary 2010 Microchip Technology Inc.
REGISTER 9-2: INTCON2: INTERRUPT CONTROL REGISTER 2 (ACCESS FF1h)
R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
RBPU INTEDG0 INTEDG1 INTEDG2 INTEDG3 TMR0IP INT3IP RBIP
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 RBPU: PORTB Pull-up Enable bit
1 = All PORTB pull-ups are disabled
0 = PORTB pull-ups are enabled by individual port latch values
bit 6 INTEDG0: External Interrupt 0 Edge Select bit
1 = Interrupt on rising edge
0 = Interrupt on falling edge
bit 5 INTEDG1: External Interrupt 1 Edge Select bit
1 = Interrupt on rising edge
0 = Interrupt on falling edge
bit 4 INTEDG2: External Interrupt 2 Edge Select bit
1 = Interrupt on rising edge
0 = Interrupt on falling edge
bit 3 INTEDG3: External Interrupt 3 Edge Select bit
1 = Interrupt on rising edge
0 = Interrupt on falling edge
bit 2 TMR0IP: TMR0 Overflow Interrupt Priority bit
1 =High priority
0 = Low priority
bit 1 INT3IP: INT3 External Interrupt Priority bit
1 =High priority
0 = Low priority
bit 0 RBIP: RB Port Change Interrupt Priority bit
1 =High priority
0 = Low priority
Note: Interrupt flag bits are set when an interrupt condition occurs, regardless of the state of its corresponding
enable bit or the global interrupt enable bit. User software should ensure the appropriate interrupt flag bits
are clear prior to enabling an interrupt. This feature allows for software polling.
2010 Microchip Technology Inc. Preliminary DS39974A-page 123
PIC18F47J13 FAMILY
REGISTER 9-3: INTCON3: INTERRUPT CONTROL REGISTER 3 (ACCESS FF0h)
R/W-1 R/W-1 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
INT2IP INT1IP INT3IE INT2IE INT1IE INT3IF INT2IF INT1IF
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 INT2IP: INT2 External Interrupt Priority bit
1 =High priority
0 = Low priority
bit 6 INT1IP: INT1 External Interrupt Priority bit
1 =High priority
0 = Low priority
bit 5 INT3IE: INT3 External Interrupt Enable bit
1 = Enables the INT3 external interrupt
0 = Disables the INT3 external interrupt
bit 4 INT2IE: INT2 External Interrupt Enable bit
1 = Enables the INT2 external interrupt
0 = Disables the INT2 external interrupt
bit 3 INT1IE: INT1 External Interrupt Enable bit
1 = Enables the INT1 external interrupt
0 = Disables the INT1 external interrupt
bit 2 INT3IF: INT3 External Interrupt Flag bit
1 = The INT3 external interrupt occurred (must be cleared in software)
0 = The INT3 external interrupt did not occur
bit 1 INT2IF: INT2 External Interrupt Flag bit
1 = The INT2 external interrupt occurred (must be cleared in software)
0 = The INT2 external interrupt did not occur
bit 0 INT1IF: INT1 External Interrupt Flag bit
1 = The INT1 external interrupt occurred (must be cleared in software)
0 = The INT1 external interrupt did not occur
Note: Interrupt flag bits are set when an interrupt condition occurs, regardless of the state of its corresponding
enable bit or the global interrupt enable bit. User software should ensure the appropriate interrupt flag bits
are clear prior to enabling an interrupt. This feature allows for software polling.
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9.2 PIR Registers
The PIR registers contain the individual flag bits for the
peripheral interrupts. Due to the number of peripheral
interrupt sources, there are three Peripheral Interrupt
Request (Flag) registers (PIR1, PIR2, PIR3).
Note 1: Interrupt flag bits are set when an interrupt
condition occurs, regardless of the state of
its corresponding enable bit or the Global
Interrupt Enable bit, GIE (INTCON<7>).
2: User software should ensure the
appropriate interrupt flag bits are cleared
prior to enabling an interrupt and after
servicing that interrupt.
REGISTER 9-4: PIR1: PE RI PHER AL INTERRUPT R EQU EST (FLAG ) REGISTER 1 (AC CESS F9Eh)
R/W-0 R/W-0 R-0 R-0 R/W-0 R/W-0 R/W-0 R/W-0
PMPIF(1) ADIF RC1IF TX1IF SSP1IF CCP1IF TMR2IF TMR1IF
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 PMPIF: Parallel Master Port Read/Write Interrupt Flag bit(1)
1 = A read or a write operation has taken place (must be cleared in software)
0 = No read or write has occurred
bit 6 ADIF: A/D Converter Interrupt Flag bit
1 = An A/D conversion completed (must be cleared in software)
0 = The A/D conversion is not complete
bit 5 RC1IF: EUSART1 Receive Interrupt Flag bit
1 = The EUSART1 receive buffer, RCREG1, is full (cleared when RCREG1 is read)
0 = The EUSART1 receive buffer is empty
bit 4 TX1IF: EUSART1 Transmit Interrupt Flag bit
1 = The EUSART1 transmit buffer, TXREG1, is empty (cleared when TXREG1 is written)
0 = The EUSART1 transmit buffer is full
bit 3 SSP1IF: Master Synchronous Serial Port 1 Interrupt Flag bit
1 = The transmission/reception is complete (must be cleared in software)
0 = Waiting to transmit/receive
bit 2 CCP1IF: ECCP1 Interrupt Flag bit
Capture mode:
1 = A TMR1/TMR3 register capture occurred (must be cleared in software)
0 = No TMR1/TMR3 register capture occurred
Compare mode:
1 = A TMR1/TMR3 register compare match occurred (must be cleared in software)
0 = No TMR1/TMR3 register compare match occurred
PWM mode:
Unused in this mode.
bit 1 TMR2IF: TMR2 to PR2 Match Interrupt Flag bit
1 = TMR2 to PR2 match occurred (must be cleared in software)
0 = No TMR2 to PR2 match occurred
bit 0 TMR1IF: TMR1 Overflow Interrupt Flag bit
1 = TMR1 register overflowed (must be cleared in software)
0 = TMR1 register did not overflow
Note 1: These bits are unimplemented on 28-pin devices.
2010 Microchip Technology Inc. Preliminary DS39974A-page 125
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REGISTER 9-5: PIR2: PE RI PHER AL INTERRU PT REQU EST (FLAG ) REGISTER 2 (AC CE SS FA1h)
R/W-0 R/W-0 R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0
OSCFIF CM2IF CM1IF — BCL1IF HLVDIF TMR3IF CCP2IF
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 OSCFIF: Oscillator Fail Interrupt Flag bit
1 = The device oscillator failed, clock input has changed to INTOSC (must be cleared in software)
0 = The device clock operating
bit 6 CM2IF: Comparator 2 Interrupt Flag bit
1 = The comparator input has changed (must be cleared in software)
0 = The comparator input has not changed
bit 5 CM1IF: Comparator 1 Interrupt Flag bit
1 = The comparator input has changed (must be cleared in software)
0 = The comparator input has not changed
bit 4 Unimplemented: Read as ‘0’
bit 3 BCL1IF: Bus Collision Interrupt Flag bit (MSSP1 module)
1 = A bus collision occurred (must be cleared in software)
0 = No bus collision occurred
bit 2 HLVDIF: High/Low-Voltage Detect (HLVD) Interrupt Flag bit
1 = A High/Low-Voltage condition occurred (must be cleared in software)
0 = An HLVD event has not occurred
bit 1 TMR3IF: TMR3 Overflow Interrupt Flag bit
1 = The TMR3 register overflowed (must be cleared in software)
0 = The TMR3 register did not overflow
bit 0 CCP2IF: ECCP2 Interrupt Flag bit
Capture mode:
1 = A TMR1/TMR3 register capture occurred (must be cleared in software)
0 = No TMR1/TMR3 register capture occurred
Compare mode:
1 = A TMR1/TMR3 register compare match occurred (must be cleared in software)
0 = No TMR1/TMR3 register compare match occurred
PWM mode:
Unused in this mode.
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DS39974A-page 126 Preliminary 2010 Microchip Technology Inc.
REGISTER 9-6: PIR3: PE RI PHER AL INTERRU PT REQU EST (FLAG ) REGISTER 3 (AC CE SS FA4h)
R/W-0 R/W-0 R-0 R-0 R/W-0 R/W-0 R/W-0 R/W-0
SSP2IF BCL2IF RC2IF TX2IF TMR4IF CTMUIF TMR3GIF RTCCIF
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 SSP2IF: Master Synchronous Serial Port 2 Interrupt Flag bit
1 = The transmission/reception is complete (must be cleared in software)
0 = Waiting to transmit/receive
bit 6 BCL2IF: Bus Collision Interrupt Flag bit (MSSP2 module)
1 = A bus collision occurred (must be cleared in software)
0 = No bus collision occurred
bit 5 RC2IF: EUSART2 Receive Interrupt Flag bit
1 = The EUSART2 receive buffer, RCREG2, is full (cleared when RCREG2 is read)
0 = The EUSART2 receive buffer is empty
bit 4 TX2IF: EUSART2 Transmit Interrupt Flag bit
1 = The EUSART2 transmit buffer, TXREG2, is empty (cleared when TXREG2 is written)
0 = The EUSART2 transmit buffer is full
bit 3 TMR4IF: TMR4 to PR4 Match Interrupt Flag bit
1 = A TMR4 to PR4 match occurred (must be cleared in software)
0 = No TMR4 to PR4 match occurred
bit 2 CTMUIF: Charge Time Measurement Unit Interrupt Flag bit
1 = A CTMU event has occurred (must be cleared in software)
0 = A CTMU event has not occurred
bit 1 TMR3GIF: Timer3 Gate Event Interrupt Flag bit
1 = A Timer3 gate event completed (must be cleared in software)
0 = No Timer3 gate event completed
bit 0 RTCCIF: RTCC Interrupt Flag bit
1 = An RTCC interrupt occurred (must be cleared in software)
0 = No RTCC interrupt occurred
2010 Microchip Technology Inc. Preliminary DS39974A-page 127
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REGISTER 9-7: PIR4: PE RI PHER AL INTERRUPT R EQU EST (FLAG ) REGISTER 4 (AC CESS F8Fh)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CCP10IF CCP9IF CCP8IF CCP7IF CCP6IF CCP5IF CCP4IF CCP3IF
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-1 CCP10IF:CCP4IF: CCP<10:4> Interrupt Flag bits
Capture Mode
1 = A TMR register capture occurred (must be cleared in software)
0 = No TMR register capture occurred
Compare Mode
1 = A TMR register compare match occurred (must be cleared in software)
0 = No TMR register compare match occurred
PWM Mode
Unused in this mode.
bit 0 CCP3IF: ECCP3 Interrupt Flag bit
Capture Mode
1 = A TMR register capture occurred (must be cleared in software)
0 = No TMR register capture occurred
Compare Mode
1 = A TMR register compare match occurred (must be cleared in software)
0 = No TMR register compare match occurred
PWM Mode
Unused in this mode.
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REGISTER 9-8: PIR5: PERIPHERAL INTER RUPT REQUEST (FLAG) REGIST ER 5 (ACCESS F98h)
U-0 U-0 R-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— CM3IF TMR8IF TMR6IF TMR5IF TMR5GIF TMR1GIF
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-6 Unimplemented: Read as ‘0’
bit 5 CM3IF: Comparator Interrupt Flag bit
1 = Comparator 3 input has changed (must be cleared in software)
0 = Comparator 3 input has not changed
bit 4 TMR8IF: TMR8 to PR8 Match Interrupt Flag bit
1 = TMR8 to PR8 match occurred (must be cleared in software)
0 = No TMR8 to PR8 match occurred
bit 3 TMR6IF: TMR6 to PR6 Match Interrupt Flag bit
1 = TMR6 to PR6 match occurred (must be cleared in software)
0 = No TMR6 to PR6 match occurred
bit 2 TMR5IF: TMR3 Overflow Interrupt Flag bit
1 = TMR3 register overflowed (must be cleared in software)
0 = TMR3 register did not overflow
bit 1 TMR5GIF: TMR5 Gate Interrupt Flag bits
1 = TMR gate interrupt occurred (must be cleared in software)
0 = No TMR gate interrupt occurred
bit 0 TMR1GIF: TMR5 Gate Interrupt Flag bits
1 = TMR gate interrupt occurred (must be cleared in software)
0 = No TMR gate interrupt occurred
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9.3 PIE Registers
The PIE registers contain the individual enable bits for
the peripheral interrupts. Due to the number of
peripheral interrupt sources, there are three Peripheral
Interrupt Enable registers (PIE1, PIE2, PIE3). When
IPEN = 0, the PEIE bit must be set to enable any of
these peripheral interrupts.
REGISTER 9-9: PIE1: PERIPHERAL INTERRUPT ENABLE REGISTER 1 (ACCESS F9Dh)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
PMPIE(1) ADIE RC1IE TX1IE SSP1IE CCP1IE TMR2IE TMR1IE
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 PMPIE: Parallel Master Port Read/Write Interrupt Enable bit(1)
1 = Enables the PMP read/write interrupt
0 = Disables the PMP read/write interrupt
bit 6 ADIE: A/D Converter Interrupt Enable bit
1 = Enables the A/D interrupt
0 = Disables the A/D interrupt
bit 5 RC1IE: EUSART1 Receive Interrupt Enable bit
1 = Enables the EUSART1 receive interrupt
0 = Disables the EUSART1 receive interrupt
bit 4 TX1IE: EUSART1 Transmit Interrupt Enable bit
1 = Enables the EUSART1 transmit interrupt
0 = Disables the EUSART1 transmit interrupt
bit 3 SSP1IE: Master Synchronous Serial Port 1 Interrupt Enable bit
1 = Enables the MSSP1 interrupt
0 = Disables the MSSP1 interrupt
bit 2 CCP1IE: ECCP1 Interrupt Enable bit
1 = Enables the ECCP1 interrupt
0 = Disables the ECCP1 interrupt
bit 1 TMR2IE: TMR2 to PR2 Match Interrupt Enable bit
1 = Enables the TMR2 to PR2 match interrupt
0 = Disables the TMR2 to PR2 match interrupt
bit 0 TMR1IE: TMR1 Overflow Interrupt Enable bit
1 = Enables the TMR1 overflow interrupt
0 = Disables the TMR1 overflow interrupt
Note 1: These bits are unimplemented on 28-pin devices.
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REGISTER 9-10: PIE2: PERIPHERAL INTERRUPT ENABLE REGISTER 2 (ACCESS FA0h)
R/W-0 R/W-0 R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0
OSCFIE CM2IE CM1IE — BCL1IE HLVDIE TMR3IE CCP2IE
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 OSCFIE: Oscillator Fail Interrupt Enable bit
1 = Enabled
0 = Disabled
bit 6 CM2IE: Comparator 2 Interrupt Enable bit
1 = Enabled
0 = Disabled
bit 5 CM1IE: Comparator 1 Interrupt Enable bit
1 = Enabled
0 = Disabled
bit 4 Unimplemented: Read as ‘0’
bit 3 BCL1IE: Bus Collision Interrupt Enable bit (MSSP1 module)
1 = Enabled
0 = Disabled
bit 2 HLVDIE: High/Low-Voltage Detect Interrupt Enable bit
1 = Enabled
0 = Disabled
bit 1 TMR3IE: TMR3 Overflow Interrupt Enable bit
1 = Enabled
0 = Disabled
bit 0 CCP2IE: ECCP2 Interrupt Enable bit
1 = Enabled
0 = Disabled
2010 Microchip Technology Inc. Preliminary DS39974A-page 131
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REGISTER 9-11: PIE3: PERIPHERAL INTERRUPT ENABLE REGISTER 3 (ACCESS FA3h)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
SSP2IE BCL2IE RC2IE TX2IE TMR4IE CTMUIE TMR3GIE RTCCIE
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 SSP2IE: Master Synchronous Serial Port 2 Interrupt Enable bit
1 = Enabled
0 = Disabled
bit 6 BCL2IE: Bus Collision Interrupt Enable bit (MSSP2 module)
1 = Enabled
0 = Disabled
bit 5 RC2IE: EUSART2 Receive Interrupt Enable bit
1 = Enabled
0 = Disabled
bit 4 TX2IE: EUSART2 Transmit Interrupt Enable bit
1 = Enabled
0 = Disabled
bit 3 TMR4IE: TMR4 to PR4 Match Interrupt Enable bit
1 = Enabled
0 = Disabled
bit 2 CTMUIE: Charge Time Measurement Unit (CTMU) Interrupt Enable bit
1 = Enabled
0 = Disabled
bit 1 TMR3GIE: Timer3 Gate Interrupt Enable bit
1 = Enabled
0 = Disabled
bit 0 RTCCIE: RTCC Interrupt Enable bit
1 = Enabled
0 = Disabled
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REGISTER 9-12: PIE4: PERIPHERAL INTERRUPT ENABLE REGISTER 4 (ACCESS F8Eh)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CCP10IE CCP9IE CCP8IE CCP7IE CCP6IE CCP5IE CCP4IE CCP3IE
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-1 CCP10IE:CCP4IE: CCP<10:4> Interrupt Enable bits
1 = Enabled
0 = Disabled
bit 0 CCP3IE: ECCP3 Interrupt Enable bit
1 = Enabled
0 = Disabled
REGISTER 9-13: PIE5: PERIPHERAL INTERRUPT ENABLE REGISTER 5 (ACCESS F91h)
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— CM3IE TMR8IE TMR6IE TMR5IE TMR5GIE TMR1GIE
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-6 Unimplemented: Read as ‘0’
bit 5 CM3IE: Comparator 3 Receive Interrupt Enable bit
1 = Enabled
0 = Disabled
bit 4 TMR8IE: TMR8 to PR8 Match Interrupt Enable bit
1 = Enabled
0 = Disabled
bit 3 TMR6IE: TMR6 to PR6 Match Interrupt Enable bit
1 = Enabled
0 = Disabled
bit 2 TMR5IE: TMR5 Overflow Interrupt Enable bit
1 = Enabled
0 = Disabled
bit 1 TMR5GIE: TMR5 Gate Interrupt Enable bit
1 = Enabled
0 = Disabled
bit 0 TMR1GIE: TMR1 Gate Interrupt Enable bit
1 = Enabled
0 = Disabled
2010 Microchip Technology Inc. Preliminary DS39974A-page 133
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9.4 IPR Registers
The IPR registers contain the individual priority bits for
the peripheral interrupts. Due to the number of
peripheral interrupt sources, there are three Peripheral
Interrupt Priority registers (IPR1, IPR2, IPR3). Using
the priority bits requires that the Interrupt Priority
Enable (IPEN) bit be set.
REGISTER 9-14: IPR1: PERIPHERAL INTERRUPT PRIORITY REGISTER 1 (ACCESS F9Fh)
R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
PMPIP(1) ADIP RC1IP TX1IP SSP1IP CCP1IP TMR2IP TMR1IP
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 PMPIP: Parallel Master Port Read/Write Interrupt Priority bit(1)
1 =High priority
0 = Low priority
bit 6 ADIP: A/D Converter Interrupt Priority bit
1 =High priority
0 = Low priority
bit 5 RC1IP: EUSART1 Receive Interrupt Priority bit
1 =High priority
0 = Low priority
bit 4 TX1IP: EUSART1 Transmit Interrupt Priority bit
1 =High priority
0 = Low priority
bit 3 SSP1IP: Master Synchronous Serial Port Interrupt Priority bit (MSSP1 module)
1 =High priority
0 = Low priority
bit 2 CCP1IP: ECCP1 Interrupt Priority bit
1 =High priority
0 = Low priority
bit 1 TMR2IP: TMR2 to PR2 Match Interrupt Priority bit
1 =High priority
0 = Low priority
bit 0 TMR1IP: TMR1 Overflow Interrupt Priority bit
1 =High priority
0 = Low priority
Note 1: These bits are unimplemented on 28-pin devices.
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DS39974A-page 134 Preliminary 2010 Microchip Technology Inc.
REGISTER 9-15: IPR2: PERIPHERAL INTERRUPT PRIORITY REGISTER 2 (ACCESS FA2h)
R/W-1 R/W-1 R/W-1 U-0 R/W-1 R/W-1 R/W-1 R/W-1
OSCFIP CM2IP CM1IP — BCL1IP HLVDIP TMR3IP CCP2IP
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 OSCFIP: Oscillator Fail Interrupt Priority bit
1 =High priority
0 = Low priority
bit 6 CM2IP: Comparator 2 Interrupt Priority bit
1 =High priority
0 = Low priority
bit 5 C12IP: Comparator 1 Interrupt Priority bit
1 =High priority
0 = Low priority
bit 4 Unimplemented: Read as ‘0’
bit 3 BCL1IP: Bus Collision Interrupt Priority bit (MSSP1 module)
1 =High priority
0 = Low priority
bit 2 HLVDIP: High/Low-Voltage Detect Interrupt Priority bit
1 =High priority
0 = Low priority
bit 1 TMR3IP: TMR3 Overflow Interrupt Priority bit
1 =High priority
0 = Low priority
bit 0 CCP2IP: ECCP2 Interrupt Priority bit
1 =High priority
0 = Low priority
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REGISTER 9-16: IPR3: PERIPHERAL INTERRUPT PRIORITY REGISTER 3 (ACCESS FA5h)
R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
SSP2IP BCL2IP RC2IP TX2IP TMR4IP CTMUIP TMR3GIP RTCCIP
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 SSP2IP: Master Synchronous Serial Port 2 Interrupt Priority bit
1 =High priority
0 = Low priority
bit 6 BCL2IP: Bus Collision Interrupt Priority bit (MSSP2 module)
1 =High priority
0 = Low priority
bit 5 RC2IP: EUSART2 Receive Interrupt Priority bit
1 =High priority
0 = Low priority
bit 4 TX2IP: EUSART2 Transmit Interrupt Priority bit
1 =High priority
0 = Low priority
bit 3 TMR4IE: TMR4 to PR4 Interrupt Priority bit
1 =High priority
0 = Low priority
bit 2 CTMUIP: Charge Time Measurement Unit (CTMU) Interrupt Priority bit
1 =High priority
0 = Low priority
bit 1 TMR3GIP: Timer3 Gate Interrupt Priority bit
1 =High priority
0 = Low priority
bit 0 RTCCIP: RTCC Interrupt Priority bit
1 =High priority
0 = Low priority
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REGISTER 9-17: IPR4: PERIPHERAL INTERRUPT PRIORITY REGISTER 4 (ACCESS F90h)
R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
CCP10IP CCP9IP CCP8IP CCP7IP CCP6IP CCP5IP CCP4IP CCP3IP
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-1 CCP10IP:CCP4IP: CCP<10:4> Interrupt Priority bits
1 =High priority
0 = Low priority
bit 0 CCP3IP: ECCP3 Interrupt Priority bit
1 =High priority
0 = Low priority
REGISTER 9-18: IPR5: PERIPHERAL INTERRUPT PRIORITY REGISTER 5 (ACCESS F99h)
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— CM3IP TMR8IP TMR6IP TMR5IP TMR5GIP TMR1GIP
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-6 Unimplemented: Read as ‘0’
bit 5 CM3IP: Comparator 3 Interrupt Priority bit
1 =High priority
0 = Low priority
bit 4 TMR8IP: TMR8 to PR8 Match Interrupt Priority bit
1 =High priority
0 = Low priority
bit 3 TMR6IP: TMR6 to PR6 Match Interrupt Priority bit
1 =High priority
0 = Low priority
bit 2 TMR5IP: TMR5 Overflow Interrupt Priority bit
1 =High priority
0 = Low priority
bit 1 TMR5GIP: TMR5 Gate Interrupt Priority bit
1 =High priority
0 = Low priority
bit 0 TMR1GIP: TMR1 Gate Interrupt Priority bit
1 =High priority
0 = Low priority
2010 Microchip Technology Inc. Preliminary DS39974A-page 137
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9.5 RCON Register
The RCON register contains bits used to determine the
cause of the last Reset or wake-up from Idle or Sleep
mode. RCON also contains the bit that enables
interrupt priorities (IPEN).
REGISTER 9-19: RCON: RESET CONTROL REGISTER (ACCESS FD0h)
R/W-0 U-0 R/W-1 R/W-1 R-1 R-1 R/W-0 R/W-0
IPEN —CMRI TO PD POR BOR
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 IPEN: Interrupt Priority Enable bit
1 = Enable priority levels on interrupts
0 = Disable priority levels on interrupts (PIC16CXXX Compatibility mode)
bit 6 Unimplemented: Read as ‘0’
bit 5 CM: Configuration Mismatch Flag bit
For details on bit operation, see Register 5-1.
bit 4 RI: RESET Instruction Flag bit
For details on bit operation, see Register 5-1.
bit 3 TO: Watchdog Timer Time-out Flag bit
For details on bit operation, see Register 5-1.
bit 2 PD: Power-Down Detection Flag bit
For details on bit operation, see Register 5-1.
bit 1 POR: Power-on Reset Status bit
For details on bit operation, see Register 5-1.
bit 0 BOR: Brown-out Reset Status bit
For details on bit operation, see Register 5-1.
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9.6 INTx Pin Interrupts
External interrupts on the INT0, INT1, INT2 and INT3
pins are edge-triggered. If the corresponding INTEDGx
bit in the INTCON2 register is set (= 1), the interrupt is
triggered by a rising edge; if the bit is clear, the trigger
is on the falling edge. When a valid edge appears on
the INTx pin, the corresponding flag bit and INTxIF are
set. This interrupt can be disabled by clearing the
corresponding enable bit, INTxIE. Flag bit, INTxIF,
must be cleared in software in the Interrupt Service
Routine before re-enabling the interrupt.
All external interrupts (INT0, INT1, INT2 and INT3) can
wake up the processor from the Sleep and Idle modes
if bit, INTxIE, was set prior to going into the
power-managed modes. Deep Sleep mode can wake
up from INT0, but the processor will start execution
from the Power-on Reset vector rather than branch to
the interrupt vector.
Interrupt priority for INT1, INT2 and INT3 is determined
by the value contained in the Interrupt Priority bits,
INT1IP (INTCON3<6>), INT2IP (INTCON3<7>) and
INT3IP (INTCON2<1>). There is no priority bit
associated with INT0; It is always a high-priority
interrupt source.
9.7 TMR0 Interrupt
In 8-bit mode (which is the default), an overflow in the
TMR0 register (FFh 00h) will set flag bit, TMR0IF. In
16-bit mode, an overflow in the TMR0H:TMR0L register
pair (FFFFh 0000h) will set TMR0IF. The interrupt
can be enabled/disabled by setting/clearing enable bit,
TMR0IE (INTCON<5>). Interrupt priority for Timer0 is
determined by the value contained in the interrupt
priority bit, TMR0IP (INTCON2<2>). See Section 12.0
“Timer0 Module” for further details on the Timer0
module.
9.8 PORTB Interrupt-on-Change
An input change on PORTB<7:4> sets flag bit, RBIF
(INTCON<0>). The interrupt can be enabled/disabled
by setting/clearing enable bit, RBIE (INTCON<3>).
Interrupt priority for PORTB interrupt-on-change is
determined by the value contained in the interrupt
priority bit, RBIP (INTCON2<0>).
9.9 Context Saving During Interrupts
During interrupts, the return PC address is saved on
the stack. Additionally, the WREG, STATUS and BSR
registers are saved on the Fast Return Stack. If a fast
return from interrupt is not used (see Section 6.3
“Data Memory Organization”), the user may need to
save the WREG, STATUS and BSR registers on entry
to the Interrupt Service Routine. Depending on the
user’s application, other registers may also need to be
saved. Example 9-1 saves and restores the WREG,
STATUS and BSR registers during an Interrupt Service
Routine (ISR).
EXAMPLE 9-1: SAVING STATUS, WREG AND BSR REGISTERS IN RAM
MOVWF W_TEMP ; W_TEMP is in virtual bank
MOVFF STATUS, STATUS_TEMP ; STATUS_TEMP located anywhere
MOVFF BSR, BSR_TEMP ; BSR_TMEP located anywhere
;
; USER ISR CODE
;
MOVFF BSR_TEMP, BSR ; Restore BSR
MOVF W_TEMP, W ; Restore WREG
MOVFF STATUS_TEMP, STATUS ; Restore STATUS
2010 Microchip Technology Inc. Preliminary DS39974A-page 139
PIC18F47J13 FAMILY
10.0 I/O PORTS
Depending on the device selected and features
enabled, there are up to five ports available. Some pins
of the I/O ports are multiplexed with an alternate
function from the peripheral features on the device. In
general, when a peripheral is enabled, that pin may not
be used as a general purpose I/O pin.
Each port has three registers for its operation. These
registers are:
• TRIS register (Data Direction register)
• PORT register (reads the levels on the pins of the
device)
• LAT register (Data Latch)
The Data Latch (LAT register) is useful for read-modify-
write operations on the value that the I/O pins are
driving.
Figure 10-1 displays a simplified model of a generic I/O
port, without the interfaces to other peripherals.
FIGURE 10-1: GENERIC I/ O POR T
OPERATION
10.1 I/O Port Pin Capabilities
When developing an application, the capabilities of the
port pins must be considered. Outputs on some pins
have higher output drive strength than others. Similarly,
some pins can tolerate higher than VDD input levels.
10.1.1 PIN OUTPUT DRIVE
The output pin drive strengths vary for groups of pins
intended to meet the needs for a variety of applications.
PORTB and PORTC are designed to drive higher
loads, such as LEDs. All other ports are designed for
small loads, typically indication only. Table 10-1 sum-
marizes the output capabilities. Refer to Section 30.0
“Electri cal Characte ristics” for more details.
TABLE 10-1: OUTPUT DRIVE LEVELS
10.1.2 INPUT PINS AND VOLTAGE
CONSIDERATIONS
The voltage tolerance of pins used as device inputs is
dependent on the pin’s input function. Pins that are used
as digital only inputs are able to handle DC voltages up
to 5.5V; a level typical for digital logic circuits. In contrast,
pins that also have analog input functions of any kind
can only tolerate voltages up to VDD. Voltage excur-
sions beyond VDD on these pins should be avoided.
Table 10-2 summarizes the input capabilities. Refer to
Section 30.0 “Electrical Characteristics” for more
details.
TABLE 10-2: INPUT VOLTAGE LEVELS
Data
Bus
WR LAT
WR TRIS
RD PORT
Data Latch
TRIS Latch
RD TRIS
Input
Buffer
I/O Pin(1)
QD
CK
QD
CK
EN
QD
EN
RD LAT
or PORT
Note 1: I/O pins have diode protection to VDD and
VSS.
Port Drive Description
PORTA
Minimum Intended for indication.PORTD
PORTE
PORTB High Suitable for direct LED drive
levels.
PORTC
Port or Pin Tolerated
Input Description
PORTA<7:0>
VDD Only VDD input levels
are tolerated.
PORTB<3:0>
PORTC<2:0>
PORTE<2:0>
PORTB<7:4>
5.5V
Tolerates input levels
above VDD, useful for
most standard logic.
PORTC<7:3>
PORTD<7:0>
PIC18F47J13 FAMILY
DS39974A-page 140 Preliminary 2010 Microchip Technology Inc.
10.1.3 INTERFACING TO A 5V SYSTEM
Though the VDDMAX of the PIC18F47J13 family is 3.6V,
these devices are still capable of interfacing with 5V
systems, even if the VIH of the target system is above
3.6V. This is accomplished by adding a pull-up resistor
to the port pin (Figure 10-2), clearing the LAT bit for that
pin and manipulating the corresponding TRISx bit
(Figure 10-1) to either allow the line to be pulled high or
to drive the pin low. Only port pins that are tolerant of
voltages up to 5.5V can be used for this type of
interface (refer to Section 10.1.2 “Input Pins and
Voltage Consid er atio ns” ).
FIGURE 10-2: +5V SYSTEM HARDWARE
INTERFACE
EXAMPLE 10-1 : COMMUNICA TING WITH
THE +5V SYSTEM
10.1.4 OPEN-DRAIN OUTPUTS
The output pins for several peripherals are also
equipped with a configurable, open-drain output option.
This allows the peripherals to communicate with
external digital logic operating at a higher voltage level,
without the use of level translators.
The open-drain option is implemented on port pins
specifically associated with the data and clock outputs
of the EUSARTs, the MSSP modules (in SPI mode) and
the ECCP modules. It is selectively enabled by setting
the open-drain control bit for the corresponding module
in the ODCON registers (Register 10-1, Register 10-2
and Register 10-3). Their configuration is discussed in
more detail with the individual port where these
peripherals are multiplexed. Output functions that are
routed through the PPS module may also use the
open-drain option. The open-drain functionality will
follow the I/O pin assignment in the PPS module.
When the open-drain option is required, the output pin
must also be tied through an external pull-up resistor
provided by the user to a higher voltage level, up to
5.5V (Figure 10-3). When a digital logic high signal is
output, it is pulled up to the higher voltage level.
FIGURE 10-3: USING THE OPEN -DRAIN
OUTPUT (USART SHOWN
AS EXAMPLE)
10.1.5 TTL INPUT BUFFER OPTION
Many of the digital I/O ports use Schmitt Trigger (ST)
input buffers. While this form of buffering works well
with many types of input, some applications may
require TTL level signals to interface with external logic
devices. This is particularly true for the Parallel Master
Port (PMP), which is likely to be interfaced to TTL level
logic or memory devices.
The inputs for the PMP can be optionally configured for
TTL buffers with the PMPTTL bit in the PADCFG1 reg-
ister (Register 10-4). Setting this bit configures all data
and control input pins for the PMP to use TTL buffers.
By default, these PMP inputs use the port’s ST buffers.
RD7
+5V Device
+5V
PIC18F47J13
BCF LATD, 7 ; set up LAT register so
; changing TRIS bit will
; drive line low
BCF TRISD, 7 ; send a 0 to the 5V system
BSF TRISD, 7 ; send a 1 to the 5V system
TXX
+5V
(at logic ‘1’)
3.3V
VDD 5V
PIC18F47J13
2010 Microchip Technology Inc. Preliminary DS39974A-page 141
PIC18F47J13 FAMILY
REGISTER 10-1: ODCON1: PERIPHERAL OPEN-DRAIN CONTROL REGISTER 1 (BANKED F42h)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CCP8OD CCP7OD CCP6OD CCP5OD CCP4OD ECCP3OD ECCP2OD ECCP1OD
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 CCP8OD: CCP8 Open-Drain Output Enable bit
1 = Open-drain capability is enabled
0 = Open-drain capability is disabled
bit 6 CCP7OD: CCP7 Open-Drain Output Enable bit
1 = Open-drain capability is enabled
0 = Open-drain capability is disabled
bit 5 CCP6OD: CCP6 Open-Drain Output Enable bit
1 = Open-drain capability is enabled
0 = Open-drain capability is disabled
bit 4 CCP5OD: CCP5 Open-Drain Output Enable bit
1 = Open-drain capability is enabled
0 = Open-drain capability is disabled
bit 3 CCP4OD: CCP4 Open-Drain Output Enable bit
1 = Open-drain capability is enabled
0 = Open-drain capability is disabled
bit 2 ECCP3OD: ECCP3 Open-Drain Output Enable bit
1 = Open-drain capability is enabled
0 = Open-drain capability is disabled
bit 1 ECCP2OD: ECCP2 Open-Drain Output Enable bit
1 = Open-drain capability is enabled
0 = Open-drain capability is disabled
bit 0 ECCP1OD: ECCP1 Open-Drain Output Enable bit
1 = Open-drain capability is enabled
0 = Open-drain capability is disabled
PIC18F47J13 FAMILY
DS39974A-page 142 Preliminary 2010 Microchip Technology Inc.
REGISTER 10-2: ODCON2: PERIPHERAL OPEN-DRAIN CONTROL REGISTER 2 (BANKED F41h)
U-0 U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — — CCP10OD CCP9OD U2OD U1OD
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-4 Unimplemented: Read as ‘0’
bit 3 CCP10OD: CCP10 Open-Drain Output Enable bit
1 = Open-drain capability is enabled
0 = Open-drain capability is disabled
bit 2 CCP9OD: CCP9 Open-Drain Output Enable bit
1 = Open-drain capability is enabled
0 = Open-drain capability is disabled
bit 1 U2OD: USART2 Open-Drain Output Enable bit
1 = Open-drain capability is enabled
0 = Open-drain capability is disabled
bit 0 U1OD: USART1 Open-Drain Output Enable bit
1 = Open-drain capability is enabled
0 = Open-drain capability is disabled
REGISTER 10-3: ODCON3: PERIPHERAL OPEN-DRAIN CONTROL REGISTER 3 (BANKED F40h)
R/W-0 U-0 U-0 U-0 U-0 U-0 R/W-0 R/W-0
CTMUDS — — — — — SPI2OD SPI1OD
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 CTMUDS: CTMU Pulse Delay Enable bit
1 = Pulse delay input for CTMU enabled on pin, RA1
bit 6-2 Unimplemented: Read as ‘0’
bit 1 SPI2OD: SPI2 Open-Drain Output Enable bit
1 = Open-drain capability is enabled
0 = Open-drain capability is disabled
bit 0 SPI1OD: SPI1 Open-Drain Output Enable bit
1 = Open-drain capability is enabled
0 = Open-drain capability is disabled
2010 Microchip Technology Inc. Preliminary DS39974A-page 143
PIC18F47J13 FAMILY
10.2 PORTA, TRISA and LATA Registers
PORTA is a 7-bit wide, bidirectional port. It may
function as a 5-bit port, depending on the oscillator
mode selected. Setting a TRISA bit (= 1) will make the
corresponding PORTA pin an input (i.e., put the
corresponding output driver in a High-Impedance
mode). Clearing a TRISA bit (= 0) will make the
corresponding PORTA pin an output (i.e., put the
contents of the output latch on the selected pin).
Reading the PORTA register reads the status of the
pins, whereas writing to it, will write to the port latch.
The Data Latch (LATA) register is also memory mapped.
Read-modify-write operations on the LATA register read
and write the latched output value for PORTA.
The other PORTA pins are multiplexed with analog
inputs, the analog VREF+ and VREF- inputs and the com-
parator voltage reference output. The operation of pins,
RA<3:0> and RA5, as A/D Converter inputs is selected
by clearing or setting the control bits in the ANCON0
register (A/D Port Configuration Register 0).
The RAx pins may also be used as comparator inputs
by setting the appropriate bits in the CMxCON registers.
To use RAx as digital inputs, it is necessary to turn off
the comparators.
All PORTA pins have TTL input levels and full CMOS
output drivers.
The TRISA register controls the direction of the PORTA
pins, even when they are being used as analog inputs.
The user must ensure the bits in the TRISA register are
maintained set when using them as analog inputs.
EXAMPLE 10-2: INITIALIZING PORT A
REGISTER 10-4: PADCFG1: PAD CONFIGURATION CONTROL REGISTER 1 (BANKED F3Ch)
U-0 U-0 U-0 U-0 U-0 R/W-0 R/W-0 R/W-0
— — — — — RTSECSEL1(1) RTSECSEL0(1) PMPTTL
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-3 Unimplemented: Read as ‘0’
bit 2-1 RTSECSEL<1:0>: RTCC Seconds Clock Output Select bits(1)
11 = Reserved; do not use
10 = RTCC source clock is selected for the RTCC pin (can be INTRC, T1OSC or T1CKI depending
upon the RTCOSC (CONFIG3L<1>) and T1OSCEN (T1CON<3>) bit settings)
01 = RTCC seconds clock is selected for the RTCC pin
00 = RTCC alarm pulse is selected for the RTCC pin
bit 0 PMPTTL: PMP Module TTL Input Buffer Select bit
1 = PMP module uses TTL input buffers
0 = PMP module uses Schmitt Trigger input buffers
Note 1: To enable the actual RTCC output, the RTCOE (RTCCFG<2>) bit needs to be set.
Note: On a Power-on Reset (POR), RA5 and
RA<3:0> are configured as analog inputs
and read as ‘0’.
CLRF PORTA ; Initialize PORTA by
; clearing output
; data latches
CLRF LATA ; Alternate method
; to clear output
; data latches
MOVLB 0x0F ; ANCONx register not in
; Access Bank
MOVLW 0x0F ; Configure A/D
MOVWF ANCON0 ; for digital inputs
MOVLW 0xCF ; Value used to
; initialize data
; direction
MOVWF TRISA ; Set RA<3:0> as inputs
; RA<5:4> as outputs
PIC18F47J13 FAMILY
DS39974A-page 144 Preliminary 2010 Microchip Technology Inc.
TABLE 10-3: PORTA I/O SUMMARY
Pin Function TRIS
Setting I/O I/O
Type Description
RA0/AN0/C1INA/
ULPWU/PMA6/
RP0
RA0 1I TTL PORTA<0> data input; disabled when analog input is enabled.
0O DIG LATA<0> data output; not affected by analog input.
AN0 1I ANA A/D Input Channel 0 and Comparator C1- input. Default
input configuration on POR; does not affect digital output.
C1INA 1I ANA Comparator 1 Input A.
ULPWU 1I ANA Ultra low-power wake-up input.
PMA6(1) xI/O ST/TTL/
DIG
Parallel Master Port digital I/O.
RP0 1I ST Remappable Peripheral Pin 0 input.
0O DIG Remappable Peripheral Pin 0 output.
RA1/AN1/C2INA/
VBG/CTDIN/
PMA7/RP1
RA1 1I TTL PORTA<1> data input; disabled when analog input is enabled.
0O DIG LATA<1> data output; not affected by analog input.
AN1 1I ANA A/D Input Channel 1 and Comparator C2- input. Default
input configuration on POR; does not affect digital output.
C2INA 1I ANA Comparator 1 Input A.
VBG xO ANA Band Gap Voltage Reference output. (Enabled by setting
the VBGOE bit (WDTCON<4>.)
CTDIN 1I ST CTMU pulse delay input.
PMA7(1) 1I ST/TTL Parallel Master Port (io_addr_in[7]).
0O DIG Parallel Master Port address.
RP1 1I ST Remappable Peripheral Pin 1 input.
0O DIG Remappable Peripheral Pin 1 output
RA2/AN2/C2INB/
C1IND/C3INB/
VREF-/CVREF
RA2 0O DIG LATA<2> data output; not affected by analog input. Disabled
when CVREF output is enabled.
1I TTL PORTA<2> data input. Disabled when analog functions are
enabled; disabled when CVREF output is enabled.
AN2 1I ANA A/D Input Channel 2 and Comparator C2+ input. Default
input configuration on POR; not affected by analog output.
C2INB 1I ANA Comparator 2 Input B.
0O ANA CTMU pulse generator charger for the C2INB comparator
input.
C1IND 1I ANA Comparator 1 Input D.
C3INB 1I ANA Comparator 3 Input B.
VREF-1I ANA A/D and comparator voltage reference low input.
CVREF xO ANA Comparator voltage reference output. Enabling this feature
disables digital I/O.
RA3/AN3/C1INB/
VREF+
RA3 0O DIG LATA<3> data output; not affected by analog input.
1I TTL PORTA<3> data input; disabled when analog input is enabled.
AN3 1I ANA A/D Input Channel 3 and Comparator C1+ input. Default
input configuration on POR.
C1INB 1I ANA Comparator 1 Input B
VREF+1I ANA A/D and comparator voltage reference high input.
Legend: DIG = Digital level output; TTL = TTL input buffer; ST = Schmitt Trigger input buffer; ANA = Analog level
input/output; x = Don’t care (TRISx bit does not affect port direction or is overridden for this option)
Note 1: This bit is only available on 44-pin devices (PIC18F46J13, PIC18F47J13, PIC18LF46J13 and
PIC18LF47J13).
2010 Microchip Technology Inc. Preliminary DS39974A-page 145
PIC18F47J13 FAMILY
TABLE 10-4: SUMMARY OF REGISTERS ASSOCIATED WITH PORTA
RA5/AN4/C1INC/
SS1/HLVDIN/
RP2
RA5 0O DIG LATA<5> data output; not affected by analog input.
1I TTL PORTA<5> data input; disabled when analog input is enabled.
AN4 1I ANA A/D Input Channel 4. Default configuration on POR.
C1INC 0O DIG Comparator 1 Input C.
SS1 1I TTL Slave select input for MSSP1.
HLVDIN 1I ANA High/Low-Voltage Detect external trip point reference input.
RP2 1I ST Remappable Peripheral Pin 2 input.
0O DIG Remappable Peripheral Pin 2 output.
OSC2/CLKO/
RA6
OSC2 xO ANA Main oscillator feedback output connection (HS mode).
CLKO xO DIG System cycle clock output (FOSC/4) in RC and EC Oscillator
modes.
RA6 1I TTL PORTA<6> data input.
0O DIG LATA<6> data output.
OSC1/CLKI/RA7 OSC1 1I ANA Main oscillator input connection.
CLKI 1I ANA Main clock input connection.
RA7 1I TTL PORTA<6> data input.
0O DIG LATA<6> data output.
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
PORTA RA7 RA6 RA5 — RA3 RA2 RA1 RA0
LATA LAT7 LAT6 LAT5 — LAT3 LAT2 LAT1 LAT0
TRISA TRIS7 TRIS6 TRISA5 — TRISA3 TRISA2 TRISA1 TRISA0
ANCON0 PCFG7(1) PCFG6(1) PCFG5(1) PCFG4 PCFG3 PCFG2 PCFG1 PCFG0
CMxCON CON COE CPOL EVPOL1 EVPOL0 CREF CCH1 CCH0
CVRCON CVREN CVROE CVRR CVRSS CVR3 CVR2 CVR1 CVR0
WDTCON REGSLP LVDSTAT ULPLVL VBGOE DS ULPEN ULPSINK SWDTEN
HLVDCON VDIRMAG BGVST IRVST HLVDEN HLVDL3 HLVDL2 HLVDL1 HLVDL0
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used by PORTA.
Note 1: These bits are only available in 44-pin devices (PIC18F46J13, PIC18F47J13, PIC18LF46J13 and
PIC18LF47J13).
TABLE 10-3: PORTA I/O SUMMARY (CONTINUED)
Pin Function TRIS
Setting I/O I/O
Type Description
Legend: DIG = Digital level output; TTL = TTL input buffer; ST = Schmitt Trigger input buffer; ANA = Analog level
input/output; x = Don’t care (TRISx bit does not affect port direction or is overridden for this option)
Note 1: This bit is only available on 44-pin devices (PIC18F46J13, PIC18F47J13, PIC18LF46J13 and
PIC18LF47J13).
PIC18F47J13 FAMILY
DS39974A-page 146 Preliminary 2010 Microchip Technology Inc.
10.3 PORTB, TRISB and LATB
Registers
PORTB is an 8-bit wide, bidirectional port. The corre-
sponding Data Direction register is TRISB. Setting a
TRISB bit (= 1) will make the corresponding PORTB
pin an input (i.e., put the corresponding output driver in
a High-Impedance mode). Clearing a TRISB bit (= 0)
will make the corresponding PORTB pin an output (i.e.,
put the contents of the output latch on the selected pin).
The Data Latch register (LATB) is also memory
mapped. Read-modify-write operations on the LATB
register read and write the latched output value for
PORTB.
EXAMPLE 10-3: INITIALIZING PORTB
Each of the PORTB pins has a weak internal pull-up. A
single control bit can turn on all the pull-ups. This is
performed by clearing bit, RBPU (INTCON2<7>). The
weak pull-up is automatically turned off when the port
pin is configured as an output. The pull-ups are
disabled on a POR. The integrated weak pull-ups
consist of a semiconductor structure similar to, but
somewhat different from, a discrete resistor. On an
unloaded I/O pin, the weak pull-ups are intended to
provide logic high indication, but will not necessarily
pull the pin all the way to VDD levels.
Four of the PORTB pins (RB<7:4>) have an interrupt-
on-change feature. Only pins configured as inputs can
cause this interrupt to occur (i.e., any RB<7:4> pin
configured as an output is excluded from the interrupt-
on-change comparison). The input pins (of RB<7:4>)
are compared with the old value latched on the last
read of PORTB. The “mismatch” outputs of RB<7:4>
are ORed together to generate the RB Port Change
Interrupt with Flag bit, RBIF (INTCON<0>).
This interrupt can wake the device from Sleep mode or
any of the Idle modes. Application software can clear
the interrupt flag by following these steps:
1. Any read or write of PORTB (except with the
MOVFF (ANY), PORTB instruction).
2. Wait one instruction cycle (such as executing a
NOP instruction).
3. Clear flag bit, RBIF.
A mismatch condition continues to set flag bit, RBIF.
Reading PORTB will end the mismatch condition and
allow flag bit, RBIF, to be cleared after one instruction
cycle of delay.
The interrupt-on-change feature is recommended for
wake-up on key depression operation and operations
where PORTB is only used for the interrupt-on-change
feature. Polling of PORTB is not recommended while
using the interrupt-on-change feature.
The RB5 pin is multiplexed with the Timer0 module
clock input and one of the comparator outputs to
become the RB5/CCP5/PMA0/KBI1/RP8 pin.
Note: On a POR, the RB<3:0> bits are
configured as analog inputs by default and
read as ‘0’; RB<7:4> bits are configured
as digital inputs.
CLRF PORTB ; Initi ali ze PORTB by
; clearing output
; data latches
CLRF LATB ; Alternate m ethod
; to clear output
; data latches
MOVLB 0x0F ; ANCON 1 not in Access
; Bank
MOVLW 0x17 ; Confi gure a s digi tal I/O
MOVWF ANCON1 ; pins in this exa mpl e
MOVLW 0xCF ; Value us ed to
; initialize data
; direction
MOVWF TRISB ; Set R B<3 :0> as inputs
; RB<5:4> as outp uts
; RB<7:6> as inpu ts
2010 Microchip Technology Inc. Preliminary DS39974A-page 147
PIC18F47J13 FAMILY
TABLE 10-5: PORTB I/O SUMMARY
Pin Function TRIS
Setting I/O I/O
Type Description
RB0/AN12/
C3IND/INT0/
RP3
RB0 1I TTL PORTB<0> data input; weak pull-up when the RBPU bit is
cleared. Disabled when analog input is enabled.(1)
0O DIG LATB<0> data output; not affected by an analog input.
AN12 1I ANA A/D Input Channel 12.(1)
C3IND 1I ANA Comparator 3 Input D.
INT0 1I ST External Interrupt 0 input.
RP3 1I ST Remappable Peripheral Pin 3 input.
0O DIG Remappable Peripheral Pin 3 output.
RB1/AN10/
C3INC/PMBE/
RTCC/RP4
RB1 1I TTL PORTB<1> data input; weak pull-up when the RBPU bit is
cleared. Disabled when an analog input is enabled.(1)
0O DIG LATB<1> data output; not affected by an analog input.
AN10 1I ANA A/D Input Channel 10.(1)
C3INC 1I ANA Comparator 3 Input C.
PMBE(3) xO DIG Parallel Master Port byte enable.
RTCC 0O DIG Asynchronous serial transmit data output (USART module).
RP4 1I ST Remappable Peripheral Pin 4 input.
0O DIG Remappable Peripheral Pin 4 output.
RB2/AN8/
C2INC/CTED1/
PMA3/REFO/
RP5
RB2 1I TTL PORTB<2> data input; weak pull-up when the RBPU bit is
cleared. Disabled when an analog input is enabled.(1)
0O DIG LATB<2> data output; not affected by an analog input.
AN8 1I ANA A/D Input Channel 8.(1)
C2INC 1I ANA Comparator 2 Input C.
CTED1 1I ST CTMU Edge 1 input.
PMA3(3) xO DIG Parallel Master Port address.
REFO 0O DIG Reference output clock.
RP5 1I ST Remappable Peripheral Pin 5 input.
0O DIG Remappable Peripheral Pin 5 output.
RB3/AN9/
C3INA/CTED2/
PMA2/RP6
RB3 0O DIG LATB<3> data output; not affected by analog input.
1I TTL PORTB<3> data input; weak pull-up when the RBPU bit is
cleared. Disabled when analog input is enabled.(1)
AN9 1I ANA A/D Input Channel 9.(1)
C3INA 1I ANA Comparator 3 Input A.
CTED2 1I ST CTMU Edge 2 input.
PMA2(3) xO DIG Parallel Master Port address.
RP6 1I ST Remappable Peripheral Pin 6 input.
0O DIG Remappable Peripheral Pin 6 output.
Legend: DIG = Digital level output; TTL = TTL input buffer; ST = Schmitt Trigger input buffer; ANA = Analog level
input/output; x = Don’t care (TRISx bit does not affect port direction or is overridden for this option)
Note 1: Pins are configured as analog inputs by default on POR. Using these pins for digital inputs requires setting
the appropriate bits in the ANCON1 register.
2: All other pin functions are disabled when ICSP™ or ICD is enabled.
3: Only on 44-pin devices (PIC18F46J13, PIC18F47J13, PIC18LF46J13 and PIC18LF47J13).
4: Only on 28-pin devices (PIC18F26J13, PIC18F27J13, PIC18LF26J13 and PIC18LF27J13).
PIC18F47J13 FAMILY
DS39974A-page 148 Preliminary 2010 Microchip Technology Inc.
RB4/CCP4/
PMA1/KBI0/
SCL2(4)/RP7
RB4 0O DIG LATB<4> data output; not affected by an analog input.
1I TTL PORTB<4> data input; weak pull-up when the RBPU bit is
cleared. Disabled when an analog input is enabled.(1)
CCP4(3) 1I ST Capture input.
0O DIG Compare/PWM output.
PMA1 xI/O ST/TTL/
DIG
Parallel Master Port address.
KBI0 1I TTL Interrupt-on-change pin.
SCL2(4) 1II
2C™/
SMBus
I2C clock input (MSSP2 module).
RP7 1I ST Remappable Peripheral Pin 7 input.
0O DIG Remappable Peripheral Pin 7 output.
RB5/CCP5/
PMA0/KBI1/
SDA2(4)/RP8
RB5 0O DIG LATB<5> data output.
1I TTL PORTB<5> data input; weak pull-up when the RBPU bit is
cleared.
CCP5(3) 1I ST Capture input.
0O DIG Compare/PWM output.
PMA0(3) xI/O ST/TTL/
DIG
Parallel Master Port address.
KBI1 1I TTL Interrupt-on-change pin.
SDA2(4) 1II
2C™/
SMBus
I2C data input (MSSP2 module).
RP8 1I ST Remappable Peripheral Pin 8 input.
0O DIG Remappable Peripheral Pin 8 output.
RB6/CCP6/
KBI2/PGC/RP9
RB6 0O DIG LATB<6> data output.
1I TTL PORTB<6> data input; weak pull-up when the RBPU bit is
cleared.
CCP6(3) 1I ST Capture input.
0O DIG Compare/PWM output.
KBI2 1I TTL Interrupt-on-change pin.
PGC xI ST Serial execution (ICSP™) clock input for ICSP and ICD
operation.(2)
RP9 1I ST Remappable Peripheral Pin 9 input.
0O DIG Remappable Peripheral Pin 9 output.
TABLE 10-5: PORTB I/O SUMMARY (CONTINUED)
Pin Function TRIS
Setting I/O I/O
Type Description
Legend: DIG = Digital level output; TTL = TTL input buffer; ST = Schmitt Trigger input buffer; ANA = Analog level
input/output; x = Don’t care (TRISx bit does not affect port direction or is overridden for this option)
Note 1: Pins are configured as analog inputs by default on POR. Using these pins for digital inputs requires setting
the appropriate bits in the ANCON1 register.
2: All other pin functions are disabled when ICSP™ or ICD is enabled.
3: Only on 44-pin devices (PIC18F46J13, PIC18F47J13, PIC18LF46J13 and PIC18LF47J13).
4: Only on 28-pin devices (PIC18F26J13, PIC18F27J13, PIC18LF26J13 and PIC18LF27J13).
2010 Microchip Technology Inc. Preliminary DS39974A-page 149
PIC18F47J13 FAMILY
TABLE 10-6: SUMMARY OF REGISTERS ASSOCIATED WITH PORTB
RB7/CCP7/
KBI3/PGD/
RP10
RB7 0O DIG LATB<7> data output.
1I TTL PORTB<7> data input; weak pull-up when the RBPU bit is
cleared.
CCP7 1I ST Capture input.
0O DIG Compare/PWM output.
KBI3 1O TTL Interrupt-on-change pin.
PGD xO DIG Serial execution data output for ICSP and ICD operation.(2)
xI ST Serial execution data input for ICSP and ICD operation.(2)
RP10 1I ST Remappable Peripheral Pin 10 input.
0O DIG Remappable Peripheral Pin 10 output.
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
PORTB RB7 RB6 RB5 RB4 RB3 RB2 RB1 RB0
LATB LATB7 LATB6 LATB5 LATB4 LATB3 LATB2 LATB1 LATB0
TRISB TRISB7 TRISB6 TRISB5 TRISB4 TRISB3 TRISB2 TRISB1 TRISB0
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF
INTCON2 RBPU INTEDG0 INTEDG1 INTEDG2 INTEDG3 TMR0IP INT3IP RBIP
INTCON3 INT2IP INT1IP INT3IE INT2IE INT1IE INT3IF INT2IF INT1IF
ANCON1 VBGEN ——PCFG12PCFG11 PCFG10 PCFG9 PCFG8
REFOCON ROON — ROSSLP ROSEL RODIV3 RODIV2 RODIV1 RODIV0
CM3CON CON COE CPOL EVPOL1 EVPOL0 CREF CCH1 CCH0
PADCFG1 — — — — — RTSECSEL1 RTSECSEL0 PMPTTL
RTCCFG RTCEN —RTCWREN RTCSYNC HALFSEC RTCOE RTCPTR1 RTCPTR0
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used by PORTB.
TABLE 10-5: PORTB I/O SUMMARY (CONTINUED)
Pin Function TRIS
Setting I/O I/O
Type Description
Legend: DIG = Digital level output; TTL = TTL input buffer; ST = Schmitt Trigger input buffer; ANA = Analog level
input/output; x = Don’t care (TRISx bit does not affect port direction or is overridden for this option)
Note 1: Pins are configured as analog inputs by default on POR. Using these pins for digital inputs requires setting
the appropriate bits in the ANCON1 register.
2: All other pin functions are disabled when ICSP™ or ICD is enabled.
3: Only on 44-pin devices (PIC18F46J13, PIC18F47J13, PIC18LF46J13 and PIC18LF47J13).
4: Only on 28-pin devices (PIC18F26J13, PIC18F27J13, PIC18LF26J13 and PIC18LF27J13).
PIC18F47J13 FAMILY
DS39974A-page 150 Preliminary 2010 Microchip Technology Inc.
10.4 PORTC, TRISC and LATC
Registers
PORTC is an 8-bit wide, bidirectional port. The corre-
sponding Data Direction register is TRISC. Setting a
TRISC bit (= 1) will make the corresponding PORTC
pin an input (i.e., put the corresponding output driver in
a high-impedance mode). Clearing a TRISC bit (= 0)
will make the corresponding PORTC pin an output (i.e.,
put the contents of the output latch on the selected pin).
The Data Latch register (LATC) is also memory
mapped. Read-modify-write operations on the LATC
register read and write the latched output value for
PORTC.
PORTC is multiplexed with several peripheral functions
(see Table 10-7). The pins have Schmitt Trigger input
buffers.
When enabling peripheral functions, care should be
taken in defining TRISx bits for each PORTC pin. Some
peripherals override the TRISx bit to make a pin an out-
put, while other peripherals override the TRISx bit to
make a pin an input. The user should refer to the
corresponding peripheral section for additional
information.
The contents of the TRISC register are affected by
peripheral overrides. Reading TRISC always returns
the current contents, even though a peripheral device
may be overriding one or more of the pins.
EXAMPLE 10-4: INITIALIZING PORTC
Note: On a Power-on Reset, PORTC pins
(except RC2) are configured as digital
inputs. RC2 will default as an analog input
(controlled by the ANCON1 register).
CLRF PORTC ; Initialize PORTC by
; clearing output
; data latches
CLRF LATC ; Alternate method
; to clear output
; data latches
MOVLW 0x3F ; Value used to
; initialize data
; direction
MOVWF TRISC ; Set RC<5:0> as inputs
; RC<7:6> as outputs
MOVLB 0x0F ; ANCON register is not in
Access Bank
BSF ANCON1,PCFG11
;Configure RC2/AN11 as
digital input
2010 Microchip Technology Inc. Preliminary DS39974A-page 151
PIC18F47J13 FAMILY
TABLE 10-7: PORTC I/O SUMMARY
Pin Function TRIS
Setting I/O I/O
Type Description
RC0/T1OSO/
T1CKI/RP11
RC0 1I ST PORTC<0> data input.
0O DIG LATC<0> data output.
T1OSO xO ANA Timer1 oscillator output; enabled when Timer1 oscillator is
enabled. Disables digital I/O.
T1CKI 1I ST Timer1 digital clock input.
RP11 1I ST Remappable Peripheral Pin 11 input.
0O DIG Remappable Peripheral Pin 11 output.
RC1/CCP8/
T1OSI/RP12
RC1 1I ST PORTC<1> data input.
0O DIG LATC<1> data output.
CCP8 1I ST Capture input.
0O DIG Compare/PWM output.
T1OSI xI ANA Timer1 oscillator input; enabled when Timer1 oscillator is
enabled. Disables digital I/O.
RP12 1I ST Remappable Peripheral Pin 12 input.
0O DIG Remappable Peripheral Pin 12 output.
RC2/AN11/
C2IND/CTPLS/
RP13
RC2 1I ST PORTC<2> data input.
0O DIG PORTC<2> data output.
AN11 1I ANA A/D Input Channel 11.
C2IND 1I ANA Comparator 2 Input D.
CTPLS 0O DIG CTMU pulse generator output.
RP13 1I ST Remappable Peripheral Pin 13 input.
0O DIG Remappable Peripheral Pin 13 output.
RC3/SCK1/
SCL1/RP14
RC3 1I ST PORTC<3> data input.
0O DIG PORTC<3> data output.
SCK1 1I ST SPI clock input (MSSP1 module).
0O DIG SPI clock output (MSSP1 module).
SCL1 1II
2C/
SMBus
I2C™ clock input (MSSP1 module).
0ODIGI
2C clock output (MSSP1 module).
RP14 1I ST Remappable Peripheral Pin 14 input.
0O DIG Remappable Peripheral Pin 14 output.
RC4/SDI1/
SDA1/RP15
RC4 0O DIG PORTC<4> data output.
SDI1 1I ST SPI data input (MSSP1 module).
SDA1 1II
2C/
SMBus
I2C data input (MSSP1 module).
0ODIGI
2C data output (MSSP1 module).
RP15 1I ST Remappable Peripheral Pin 15 input.
0O DIG Remappable Peripheral Pin 15 output.
Legend: DIG = Digital level output; TTL = TTL input buffer; ST = Schmitt Trigger input buffer; ANA = Analog level
input/output; I2C/SMB = I2C/SMBus input buffer; x = Don’t care (TRISx bit does not affect port direction or is
overridden for this option)
Note 1: This bit is only available on 44-pin devices (PIC18F46J13, PIC18F47J13, PIC18LF46J13 and
PIC18LF47J13).
PIC18F47J13 FAMILY
DS39974A-page 152 Preliminary 2010 Microchip Technology Inc.
TABLE 10-8: SUMMARY OF REGISTERS ASSOCIATED WITH PORTC
RC5/SDO1/
RP16
RC5 0O DIG PORTC<5> data output.
SDO1 xO DIG SPI data output (MSSP1 module).
RP16 1I ST Remappable Peripheral Pin 16 input.
0O DIG Remappable Peripheral Pin 16 output.
RC6/CCP9/
PMA5/TX1/
CK1/RP17
RC6 1I ST PORTC<6> data input.
0O DIG LATC<6> data output.
CCP9 1I ST Capture input.
0O DIG Compare/PWM output.
PMA5(1) 1I ST/TTL Parallel Master Port io_addr_in<5>.
0O DIG Parallel Master Port address.
TX1 0O DIG Asynchronous serial transmit data output (EUSART module);
takes priority over port data. User must configure as an output.
CK1 1I ST Synchronous serial clock input (EUSART module).
0O DIG Synchronous serial clock output (EUSART module); takes
priority over port data.
RP17 1I ST Remappable Peripheral Pin 17 input.
0O DIG Remappable Peripheral Pin 17 output.
RC7/CCP10/
PMA4/RX1/
DT1/RP18
RC7 1I ST PORTC<7> data input.
0O DIG LATC<7> data output.
CCP10 1I ST Capture input.
0O DIG Compare/PWM output.
PMA4(1) xI/O ST/TTL/
DIG
Parallel Master Port address.
RX1 1I ST Asynchronous serial receive data input (EUSART module).
DT1 11 ST Synchronous serial data input (EUSART module). User
must configure as an input.
0O DIG Synchronous serial data output (EUSART module); takes
priority over port data.
RP18 1I ST Remappable Peripheral Pin 18 input.
0O DIG Remappable Peripheral Pin 18 output.
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
PORTC RC7 RC6 RC5 RC4 RC3 RC2 RC1 RC0
LATC LATC7 LATC6 LATC5 LATC4 LATC3 LATC2 LATC1 LATC0
TRISC TRISC7 TRISC6 TRISC5 TRISC4 TRISC3 TRISC2 TRISC1 TRISC0
ANCON1 VBGEN — — PCFG12 PCFG11 PCFG10 PCFG9 PCFG8
CM2CON CON COE CPOL EVPOL1 EVPOL0 CREF CCH1 CCH0
RTCCFG RTCEN — RTCWREN RTCSYNC HALFSEC RTCOE RTCPTR1 RTCPTR0
TABLE 10-7: PORTC I/O SUMMARY (CONTINUED)
Pin Function TRIS
Setting I/O I/O
Type Description
Legend: DIG = Digital level output; TTL = TTL input buffer; ST = Schmitt Trigger input buffer; ANA = Analog level
input/output; I2C/SMB = I2C/SMBus input buffer; x = Don’t care (TRISx bit does not affect port direction or is
overridden for this option)
Note 1: This bit is only available on 44-pin devices (PIC18F46J13, PIC18F47J13, PIC18LF46J13 and
PIC18LF47J13).
2010 Microchip Technology Inc. Preliminary DS39974A-page 153
PIC18F47J13 FAMILY
10.5 PORTD, TRISD and LATD
Registers
PORTD is an 8-bit wide, bidirectional port. The corre-
sponding Data Direction register is TRISD. Setting a
TRISD bit (= 1) will make the corresponding PORTD
pin an input (i.e., put the corresponding output driver in
a High-Impedance mode). Clearing a TRISD bit (= 0)
will make the corresponding PORTD pin an output (i.e.,
put the contents of the output latch on the selected pin).
The Data Latch register (LATD) is also memory
mapped. Read-modify-write operations on the LATD
register read and write the latched output value for
PORTD.
All pins on PORTD are implemented with Schmitt Trigger
input buffers. Each pin is individually configurable as an
input or output.
EXAMPLE 10-5: INITIALIZING PORTD
Each of the PORTD pins has a weak internal pull-up. A
single control bit can turn on all the pull-ups. This is per-
formed by clearing bit, RDPU (TRISE<7>). The weak
pull-up is automatically turned off when the port pin is
configured as an output. The pull-ups are disabled on a
POR. The integrated weak pull-ups consist of a semi-
conductor structure similar to, but somewhat different
from, a discrete resistor. On an unloaded I/O pin, the
weak pull-ups are intended to provide logic high indica-
tion, but will not necessarily pull the pin all the way to
VDD levels.
Note that the pull-ups can be used for any set of
features, similar to the pull-ups found on PORTB.
Note: PORTD is available only in 44-pin devices.
Note: On a POR, these pins are configured as
digital inputs.
CLRF PORTD ; Initialize PORTD by
; clearing output
; data latches
CLRF LATD ; Alternate method
; to clear output
; data latches
MOVLW 0xCF ; Value used to
; initialize data
; direction
MOVWF TRISD ; Set RD<3:0> as inputs
; RD<5:4> as outputs
; RD<7:6> as inputs
PIC18F47J13 FAMILY
DS39974A-page 154 Preliminary 2010 Microchip Technology Inc.
TABLE 10-9: PORTD I/O SUMMARY
Pin Function TRIS
Setting I/O I/O
Type Description
RD0/PMD0/
SCL2
RD0 1I ST PORTD<0> data input.
0O DIG LATD<0> data output.
PMD0(1) 1I ST/TTL Parallel Master Port data in.
0O DIG Parallel Master Port data out.
SCL2(1) 1II
2C/
SMB
I2C™ clock input (MSSP2 module); input type depends on
the module setting.
0ODIGI
2C clock output (MSSP2 module); takes priority over port data.
RD1/PMD1/
SDA2
RD1 1I ST PORTD<1> data input.
0O DIG LATD<1> data output.
PMD1(1) 1I ST/TTL Parallel Master Port data in.
0O DIG Parallel Master Port data out.
SDA2(1) 1II
2C/
SMB
I2C data input (MSSP2 module); input type depends on
the module setting.
0ODIGI
2C data output (MSSP2 module); takes priority over port data.
RD2/PMD2/
RP19
RD2 1I ST PORTD<2> data input.
0O DIG LATD<2> data output.
PMD2(1) 1I ST/TTL Parallel Master Port data in.
0O DIG Parallel Master Port data out.
RP19 1I ST Remappable Peripheral Pin 19 input.
0O DIG Remappable Peripheral Pin 19 output.
RD3/PMD3/
RP20
RD3 1I ST PORTD<3> data input.
0O DIG LATD<3> data output.
PMD3(1) 1I ST/TTL Parallel Master Port data in.
0O DIG Parallel Master Port data out.
RP20 1I ST Remappable Peripheral Pin 20 input.
0O DIG Remappable Peripheral Pin 20 output.
RD4/PMD4/
RP21
RD4 1I ST PORTD<4> data input.
0O DIG LATD<4> data output.
PMD4(1) 1I ST/TTL Parallel Master Port data in.
0O DIG Parallel Master Port data out.
RP21 1I ST Remappable Peripheral Pin 21 input.
0O DIG Remappable Peripheral Pin 21 output.
RD5/PMD5/
RP22
RD5 1I ST PORTD<5> data input.
0O DIG LATD<5> data output.
PMD5(1) 1I ST/TTL Parallel Master Port data in.
0O DIG Parallel Master Port data out.
RP22 1I ST Remappable Peripheral Pin 22 input.
0O DIG Remappable Peripheral Pin 22 output.
Legend: DIG = Digital level output; TTL = TTL input buffer; ST = Schmitt Trigger input buffer; I2C/SMB = I2C/SMBus
input buffer; x = Don’t care (TRISx bit does not affect port direction or is overridden for this option).
Note 1: Only on 44-pin devices (PIC18F46J13, PIC18F47J13, PIC18LF46J13 and PIC18LF47J13).
2010 Microchip Technology Inc. Preliminary DS39974A-page 155
PIC18F47J13 FAMILY
TABLE 10-10: SUMMARY OF REGISTERS ASSOCIATED WITH PORTD
RD6/PMD6/
RP23
RD6 1I ST PORTD<6> data input.
0O DIG LATD<6> data output.
PMD6(1) 1I ST/TTL Parallel Master Port data in.
0O DIG Parallel Master Port data out.
RP23 1I ST Remappable Peripheral Pin 23 input.
0O DIG Remappable Peripheral Pin 23 output.
RD7/PMD7/
RP24
RD7 1I ST PORTD<7> data input.
0O DIG LATD<7> data output.
PMD7(1) 1I ST/TTL Parallel Master Port data in.
0O DIG Parallel Master Port data out.
RP24 1I ST Remappable Peripheral Pin 24 input.
0O DIG Remappable Peripheral Pin 24 output.
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
PORTD(1) RD7 RD6 RD5 RD4 RD3 RD2 RD1 RD0
LATD(1) LATD7 LATD6 LATD5 LATD4 LATD3 LATD2 LATD1 LATD0
TRISD(1) TRISD7 TRISD6 TRISD5 TRISD4 TRISD3 TRISD2 TRISD1 TRISD0
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used by PORTD.
Note 1: These registers are not available in 28-pin devices (PIC18F26J13, PIC18F27J13, PIC18LF26J13 and
PIC18LF26J13).
TABLE 10-9: PORTD I/O SUMMARY (CONTINUED)
Pin Function TRIS
Setting I/O I/O
Type Description
Legend: DIG = Digital level output; TTL = TTL input buffer; ST = Schmitt Trigger input buffer; I2C/SMB = I2C/SMBus
input buffer; x = Don’t care (TRISx bit does not affect port direction or is overridden for this option).
Note 1: Only on 44-pin devices (PIC18F46J13, PIC18F47J13, PIC18LF46J13 and PIC18LF47J13).
PIC18F47J13 FAMILY
DS39974A-page 156 Preliminary 2010 Microchip Technology Inc.
10.6 PORTE, TRISE and LATE
Registers
Depending on the particular PIC18F47J13 family
device selected, PORTE is implemented in two
different ways.
For 44-pin devices, PORTE is a 3-bit wide port. Three
pins (RE0/AN5/PMRD, RE1/AN6/PMWR and RE2/
AN7/PMCS) are individually configurable as inputs or
outputs. These pins have Schmitt Trigger input buffers.
When selected as analog inputs, these pins will read as
‘0’s.
The corresponding Data Direction register is TRISE.
Setting a TRISE bit (= 1) will make the corresponding
PORTE pin an input (i.e., put the corresponding output
driver in a High-Impedance mode). Clearing a TRISE
bit (= 0) will make the corresponding PORTE pin an
output (i.e., put the contents of the output latch on the
selected pin).
TRISE controls the direction of the RE pins, even when
they are being used as analog inputs. The user must
make sure to keep the pins configured as inputs when
using them as analog inputs.
The Data Latch register (LATE) is also memory
mapped. Read-modify-write operations on the LATE
register read and write the latched output value for
PORTE.
EXAMPLE 10-6: INITIALIZING PORTE
Each of the PORTE pins has a weak internal pull-up. A
single control bit can turn on all the pull-ups. This is per-
formed by clearing bit, REPU (TRISE<6>). The weak
pull-up is automatically turned off when the port pin is
configured as an output. The pull-ups are disabled on a
POR. The integrated weak pull-ups consist of a semi-
conductor structure similar to, but somewhat different,
from a discrete resistor. On an unloaded I/O pin, the
weak pull-ups are intended to provide logic high indica-
tion, but will not necessarily pull the pin all the way to
VDD levels.
Note that the pull-ups can be used for any set of
features, similar to the pull-ups found on PORTB.
Note: PORTE is available only in 44-pin devices.
Note: On a POR, RE<2:0> are configured as
analog inputs.
CLRF PORTE ; Initialize PORTE by
; clearing output
; data latches
CLRF LATE ; Alternate method
; to clear output
; data latches
MOVLW 0xE0 ; Configure REx
MOVWF ANCON0 ; for digital inputs
MOVLW 0x03 ; Value used to
; initialize data
; direction
MOVWF TRISE ; Set RE<0> as inputs
; RE<1> as outputs
; RE<2> as inputs
2010 Microchip Technology Inc. Preliminary DS39974A-page 157
PIC18F47J13 FAMILY
TABLE 10-11: PORTE I/O SUMMARY
TABLE 10-12: SUMMARY OF REGISTERS ASSOCIATED WITH PORTE
Pin Function TRIS
Setting I/O I/O
Type Description
RE0/AN5/
PMRD
RE0 1I ST PORTE<0> data input; disabled when analog input is enabled.
0O DIG LATE<0> data output; not affected by analog input.
AN5 1I ANA A/D Input Channel 5; default input configuration on POR.
PMRD 1I ST/TTL Parallel Master Port (io_rd_in).
0O DIG Parallel Master Port read strobe.
RE1/AN6/
PMWR
RE1 1I ST PORTE<1> data input; disabled when analog input is enabled.
0O DIG LATE<1> data output; not affected by analog input.
AN6 1I ANA A/D Input Channel 6; default input configuration on POR.
PMWR 1I ST/TTL Parallel Master Port (io_wr_in).
0O DIG Parallel Master Port write strobe.
RE2/AN7/
PMCS
RE2 1I ST PORTE<2> data input; disabled when analog input is enabled.
0O DIG LATE<2> data output; not affected by an analog input.
AN7 1I ANA A/D Input Channel 7; default input configuration on POR.
PMCS 0O DIG Parallel Master Port byte enable.
Legend: DIG = Digital level output; TTL = TTL input buffer; ST = Schmitt Trigger input buffer; ANA = Analog level
I = Input; O = Output; P = Power
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
PORTE(1) — — — — — RE2 RE1 RE0
LATE(1) — — — — — LATE2 LATE1 LATE0
TRISE(1) RDPU REPU — — — TRISE2 TRISE1 TRISE0
ANCON0 PCFG7(1) PCFG6(1) PCFG5(1) PCFG4 PCFG3 PCFG2 PCFG1 PCFG0
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used by PORTE.
Note 1: These registers and/or bits are not available in 28-pin devices (PIC18F26J13, PIC18F27J13,
PIC18LF26J13 and PIC18LF26J13).
Note: bit 7 RDPU: PORTD Pull-up Enable bit
0 = All PORTD pull-up s ar e disabled
1 = PORTD pull-ups are en abled for any input pa d
bit 6 REPU: PORTE Pull-up Enable bit
0 = All PORTE pull-u ps are disabled
1 = PORTE pull-ups are enabled for any input pad
PIC18F47J13 FAMILY
DS39974A-page 158 Preliminary 2010 Microchip Technology Inc.
10.7 Peripheral Pin Select (PPS)
A major challenge in general purpose devices is provid-
ing the largest possible set of peripheral features while
minimizing the conflict of features on I/O pins. The
challenge is even greater on low pin count devices
similar to the PIC18F47J13 family. In an application
that needs to use more than one peripheral, multi-
plexed on a single pin, inconvenient work arounds in
application code or a complete redesign may be the
only option.
The Peripheral Pin Select (PPS) feature provides an
alternative to these choices by enabling the user’s
peripheral set selection and its placement on a wide
range of I/O pins. By increasing the pinout options
available on a particular device, users can better tailor
the microcontroller to their entire application, rather than
trimming the application to fit the device.
The PPS feature operates over a fixed subset of digital
I/O pins. Users may independently map the input and/
or output of any one of the many digital peripherals to
any one of these I/O pins. PPS is performed in
software, and generally, does not require the device to
be reprogrammed. Hardware safeguards are included
that prevent accidental or spurious changes to the
peripheral mapping once it has been established.
10.7.1 AVAILABLE PINS
The PPS feature is used with a range of up to 22 pins.
The number of available pins is dependent on the
particular device and its pin count. Pins that support the
PPS feature include the designation “RPn” in their full
pin designation, where “RP” designates a remappable
peripheral and “n” is the remappable pin number. See
Table 1-3 and Table 1-4 for pinout options in each
package offering.
10.7.2 AVAILABLE PERIPHERALS
The peripherals managed by the PPS are all digital
only peripherals. These include general serial commu-
nications (UART and SPI), general purpose timer clock
inputs, timer-related peripherals (input capture and
output compare) and external interrupt inputs. Also
included are the outputs of the comparator module,
since these are discrete digital signals.
The PPS module is not applied to I2C, change notifica-
tion inputs, RTCC alarm outputs or peripherals with
analog inputs. Additionally, the MSSP1 and EUSART1
modules are not routed through the PPS module.
A key difference between pin select and non-pin select
peripherals is that pin select peripherals are not asso-
ciated with a default I/O pin. The peripheral must
always be assigned to a specific I/O pin before it can be
used. In contrast, non-pin select peripherals are always
available on a default pin, assuming that the peripheral
is active and not conflicting with another peripheral.
10.7.2.1 Peripheral Pin Select Function
Priority
When a pin selectable peripheral is active on a given I/O
pin, it takes priority over all other digital I/O and digital
communication peripherals associated with the pin.
Priority is given regardless of the type of peripheral that
is mapped. Pin select peripherals never take priority
over any analog functions associated with the pin.
10.7.3 CONTROLLING PERIPHERAL PIN
SELECT
PPS features are controlled through two sets of Special
Function Registers (SFRs): one to map peripheral
inputs and the other to map outputs. Because they are
separately controlled, a particular peripheral’s input
and output (if the peripheral has both) can be placed on
any selectable function pin without constraint.
The association of a peripheral to a peripheral selectable
pin is handled in two different ways, depending on
whether an input or an output is being mapped.
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10.7.3.1 Input Mapping
The inputs of the PPS options are mapped on the basis
of the peripheral; that is, a control register associated
with a peripheral dictates the pin it will be mapped to. The
RPINRx registers are used to configure peripheral input
mapping (see Register 10-6 through Register 10-23).
Each register contains a 5-bit field which is associated
with one of the pin selectable peripherals. Programming
a given peripheral’s bit field with an appropriate 5-bit
value maps the RPn pin with that value to that peripheral.
For any given device, the valid range of values for any of
the bit fields corresponds to the maximum number of
Peripheral Pin Selections supported by the device.
TABLE 10-13:
SELECT ABLE
INPUT SOURCES
(M A P S I N P UT TO FUNCTION)(1)
Input Name Function Name Register Configuration
Bits
External Interrupt 1 INT1 RPINR1 INTR1R<4:0>
External Interrupt 2 INT2 RPINR2 INTR2R<4:0>
External Interrupt 3 INT3 RPINR3 INTR3R<4:0>
Timer0 External Clock Input T0CKI RPINR4 T0CKR<4:0>
Timer3 External Clock Input T3CKI RPINR6 T3CKR<4:0>
Timer5 External Clock Input T5CKI RPINR15 T5CKR<4:0>
Input Capture 1 CCP1 RPINR7 IC1R<4:0>
Input Capture 2 CCP2 RPINR8 IC2R<4:0>
Input Capture 3 CCP3 RPINR9 IC3R<4:0>
Timer1 Gate Input T1G RPINR12 T1GR<4:0>
Timer3 Gate Input T3G RPINR13 T3GR<4:0>
Timer5 Gate Input T5G RPINR14 T5GR<4:0>
EUSART2 Asynchronous Receive/Synchronous
Receive
RX2/DT2 RPINR16 RX2DT2R<4:0>
EUSART2 Asynchronous Clock Input CK2 RPINR17 CK2R<4:0>
SPI2 Data Input SDI2 RPINR21 SDI2R<4:0>
SPI2 Clock Input SCK2IN RPINR22 SCK2R<4:0>
SPI2 Slave Select Input SS2IN RPINR23 SS2R<4:0>
PWM Fault Input FLT0 RPINR24 OCFAR<4:0>
Note 1: Unless otherwise noted, all inputs use the Schmitt Trigger input buffers.
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10.7.3.2 Output Mapping
In contrast to inputs, the outputs of the PPS options are
mapped on the basis of the pin. In this case, a control reg-
ister associated with a particular pin dictates the periph-
eral output to be mapped. The RPORx registers are used
to control output mapping. The value of the bit field corre-
sponds to one of the peripherals and that peripheral’s
output is mapped to the pin (see Table 10-14).
Because of the mapping technique, the list of
peripherals for output mapping also includes a null value
of ‘00000’. This permits any given pin to remain discon-
nected from the output of any of the pin selectable
peripherals.
TABLE 10-14: SELECTABLE OUTPUT SOURCES (MAPS FUNCTION TO OUTPUT)
Function Output Function
Number(1) Output Name
NULL 0NULL(2)
C1OUT 1 Comparator 1 Output
C2OUT 2 Comparator 2 Output
C3OUT 3 Comparator 3 Output
TX2/CK2 6 EUSART2 Asynchronous Transmit/Asynchronous Clock Output
DT2 7 EUSART2 Synchronous Transmit
SDO2 10 SPI2 Data Output
SCK2 11 SPI2 Clock Output
SSDMA 12 SPI DMA Slave Select
ULPOUT 13 Ultra Low-Power Wake-up Event
CCP1/P1A 14 ECCP1 Compare or PWM Output Channel A
P1B 15 ECCP1 Enhanced PWM Output, Channel B
P1C 16 ECCP1 Enhanced PWM Output, Channel C
P1D 17 ECCP1 Enhanced PWM Output, Channel D
CCP2/P2A 18 ECCP2 Compare or PWM Output
P2B 19 ECCP2 Enhanced PWM Output, Channel B
P2C 20 ECCP2 Enhanced PWM Output, Channel C
P2D 21 ECCP2 Enhanced PWM Output, Channel D
CCP3/P3A 22 ECCP3 Compare or PWM Output
P3B 23 ECCP3 Enhanced PWM Output, Channel B
P3C 24 ECCP3 Enhanced PWM Output, Channel C
P3D 25 ECCP3 Enhanced PWM Output, Channel D
Note 1: Value assigned to the RP<4:0> pins corresponds to the peripheral output function number.
2: The NULL function is assigned to all RPn outputs at device Reset and disables the RPn output function.
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10.7.3.3 Mapping Limitations
The control schema of the PPS is extremely flexible.
Other than systematic blocks that prevent signal con-
tention caused by two physical pins being configured
as the same functional input or two functional outputs
configured as the same pin, there are no hardware
enforced lockouts. The flexibility extends to the point of
allowing a single input to drive multiple peripherals or a
single functional output to drive multiple output pins.
10.7.4 CONTROLLING CONFIGURATION
CHANGES
Because peripheral remapping can be changed during
run time, some restrictions on peripheral remapping
are needed to prevent accidental configuration
changes. PIC18F devices include three features to
prevent alterations to the peripheral map:
• Control register lock sequence
• Continuous state monitoring
• Configuration bit remapping lock
10.7.4.1 Control Register Lock
Under normal operation, writes to the RPINRx and
RPORx registers are not allowed. Attempted writes will
appear to execute normally, but the contents of the
registers will remain unchanged. To change these reg-
isters, they must be unlocked in hardware. The register
lock is controlled by the IOLOCK bit (PPSCON<0>).
Setting IOLOCK prevents writes to the control
registers; clearing IOLOCK allows writes.
To set or clear IOLOCK, a specific command sequence
must be executed:
1. Write 55h to EECON2<7:0>.
2. Write AAh to EECON2<7:0>.
3. Clear (or set) IOLOCK as a single operation.
IOLOCK remains in one state until changed. This
allows all of the PPS registers to be configured with a
single unlock sequence followed by an update to all
control registers, then locked with a second lock
sequence.
10.7.4.2 Continuous State Monitoring
In addition to being protected from direct writes, the
contents of the RPINRx and RPORx registers are
constantly monitored in hardware by shadow registers.
If an unexpected change in any of the registers occurs
(such as cell disturbances caused by ESD or other
external events), a Configuration Mismatch Reset will
be triggered.
10.7.4.3 Configuration Bit Pin Select Lock
As an additional level of safety, the device can be con-
figured to prevent more than one write session to the
RPINRx and RPORx registers. The IOL1WAY
(CONFIG3H<0>) Configuration bit blocks the IOLOCK
bit from being cleared after it has been set once. If
IOLOCK remains set, the register unlock procedure will
not execute and the PPS Control registers cannot be
written to. The only way to clear the bit and re-enable
peripheral remapping is to perform a device Reset.
In the default (unprogrammed) state, IOL1WAY is set,
restricting users to one write session. Programming
IOL1WAY allows users unlimited access (with the
proper use of the unlock sequence) to the PPS
registers.
10.7.5 CONSIDERATIONS FOR
PERIPHERAL PIN SELECTION
The ability to control Peripheral Pin Selection intro-
duces several considerations into application design
that could be overlooked. This is particularly true for
several common peripherals that are available only as
remappable peripherals.
The main consideration is that the PPS is not available
on default pins in the device’s default (Reset) state.
Since all RPINRx registers reset to ‘11111’ and all
RPORx registers reset to ‘00000’, all PPS inputs are
tied to RP31 and all PPS outputs are disconnected.
This situation requires the user to initialize the device
with the proper peripheral configuration before any
other application code is executed. Since the IOLOCK
bit resets in the unlocked state, it is not necessary to
execute the unlock sequence after the device has
come out of Reset.
For application safety, however, it is best to set
IOLOCK and lock the configuration after writing to the
control registers.
The unlock sequence is timing-critical. Therefore, it is
recommended that the unlock sequence be executed
as an assembly language routine with interrupts
temporarily disabled. If the bulk of the application is
written in C or another high-level language, the unlock
sequence should be performed by writing in-line
assembly.
Note: In tying PPS inputs to RP31, RP31 does
not have to exist on a device for the
registers to be reset to it.
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Choosing the configuration requires the review of all
PPSs and their pin assignments, especially those that
will not be used in the application. In all cases, unused
pin selectable peripherals should be disabled com-
pletely. Unused peripherals should have their inputs
assigned to an unused RPn pin function. I/O pins with
unused RPn functions should be configured with the
null peripheral output.
The assignment of a peripheral to a particular pin does
not automatically perform any other configuration of the
pin’s I/O circuitry. In theory, this means adding a pin
selectable output to a pin may mean inadvertently
driving an existing peripheral input when the output is
driven. Users must be familiar with the behavior of
other fixed peripherals that share a remappable pin and
know when to enable or disable them. To be safe, fixed
digital peripherals that share the same pin should be
disabled when not in use.
Along these lines, configuring a remappable pin for a
specific peripheral does not automatically turn that
feature on. The peripheral must be specifically config-
ured for operation and enabled, as if it were tied to a
fixed pin. Where this happens in the application code
(immediately following device Reset and peripheral
configuration or inside the main application routine)
depends on the peripheral and its use in the
application.
A final consideration is that the PPS functions neither
override analog inputs nor reconfigure pins with analog
functions for digital I/O. If a pin is configured as an
analog input on device Reset, it must be explicitly
reconfigured as digital I/O when used with a PPS.
Example 10-7 provides a configuration for bidirectional
communication with flow control using EUSART2. The
following input and output functions are used:
• Input Function RX2
• Output Function TX2
EXAMPLE 10-7: CONFIGURING EUSART2
INPUT AND OUTPUT
FUNCTIONS
Note: If the Configuration bit, IOL1WAY = 1,
once the IOLOCK bit is set, it cannot be
cleared, preventing any future RP register
changes. The IOLOCK bit is cleared back
to ‘0’ on any device Reset.
;*************************************
; Unlock Registers
;*************************************
MOVLB 0x0E ; PPS registers in BANK 14
BCF INTCON, GIE ; Disable interrupts
MOVLW 0x55
MOVWF EECON2, 0
MOVLW 0xAA
MOVWF EECON2, 0
; Turn off PPS Write Protect
BCF PPSCON, IOLOCK, BANKED
;***************************
; Configure Input Functions
; (See Table 10-13)
;***************************
;***************************
; Assign RX2 To Pin RP0
;***************************
MOVLW 0x00
MOVWF RPINR16, BANKED
;***************************
; Configure Output Functions
; (See Table 10-14)
;***************************
;***************************
; Assign TX2 To Pin RP1
;***************************
MOVLW 0x06
MOVWF RPOR1, BANKED
;*************************************
; Lock Registers
;*************************************
BCF INTCON, GIE
MOVLW 0x55
MOVWF EECON2, 0
MOVLW 0xAA
MOVWF EECON2, 0
; Write Protect PPS
BSF PPSCON, IOLOCK, BANKED
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10.7.6 PERIPHERAL PIN SELECT
REGISTERS
The PIC18F47J13 family of devices implements a total
of 37 registers for remappable peripheral configuration
of 44-pin devices. The 28-pin devices have 31 registers
for remappable peripheral configuration.
Note: Input and output register values can only be
changed if IOLOCK (PPSCON<0>) = 0.
See Example 10-7 for a specific command
sequence.
REGISTER 10-5: PPSCON: PERIPHERAL PI N SELECT INPUT REGISTER 0 (BANKED EBFh)(1)
U-0 U-0 U-0 U-0 U-0 U-0 U-0 R/W-0
— — — — — — —IOLOCK
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-1 Unimplemented: Read as ‘0’
bit 0 IOLOCK: I/O Lock Enable bit
1 = I/O lock is active, RPORx and RPINRx registers are write-protected
0 = I/O lock is not active, pin configurations can be changed
Note 1: Register values can only be changed if IOLOCK (PPSCON<0>) = 0.
REGISTER 10-6: RPINR1: PERIPHERAL PIN SELECT INPUT REGISTER 1 (BANKED EE1h)
U-0 U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
— — — INTR1R4 INTR1R3 INTR1R2 INTR1R1 INTR1R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 INTR1R<4:0>: Assign External Interrupt 1 (INT1) to the Corresponding RPn Pin bits
REGISTER 10-7: RPINR2: PERIPHERAL PIN SELECT INPUT REGISTER 2 (BANKED EE2h)
U-0 U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
— — — INTR2R4 INTR2R3 INTR2R2 INTR2R1 INTR2R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 INTR2R<4:0>: Assign External Interrupt 2 (INT2) to the Corresponding RPn Pin bits
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REGISTER 10-8: RPINR3: PERIPHERAL PIN SELECT INPUT REGISTER 3 (BANKED EE3h)
U-0 U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
— — — INTR3R4 INTR3R3 INTR3R2 INTR3R1 INTR3R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 INTR3R<4:0>: Assign External Interrupt 3 (INT3) to the Corresponding RPn Pin bits
REGISTER 10-9: RPINR4: PERIPHERAL PIN SELECT INPUT REGISTER 4 (BANKED EE4h)
U-0 U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
— — — T0CKR4 T0CKR3 T0CKR2 T0CKR1 T0CKR0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 T0CKR<4:0>: Timer0 External Clock Input (T0CKI) to the Corresponding RPn Pin bits
REGISTER 10-10: RPINR6: PERIPHERAL PIN SELECT INPUT REGISTER 6 (BANKED EE6h)
U-0 U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
— — — T3CKR4 T3CKR3 T3CKR2 T3CKR1 T3CKR0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 T3CKR<4:0>: Timer3 External Clock Input (T3CKI) to the Corresponding RPn Pin bits
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REGISTER 10-1 1: RPINR7: PERIPHERAL PIN SELECT INPUT REGISTER 7 (BANKED EE8h)
U-0 U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
— — — IC1R4 IC1R3 IC1R2 IC1R1 IC1R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 IC1R<4:0>: Assign Input Capture 1 (ECCP1) to the Corresponding RPn Pin bits
REGISTER 10-12: RPINR8: PERIPHERAL PIN SELECT INPUT REGISTER 8 (BANKED EE9h)
U-0 U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
— — — IC2R4 IC2R3 IC2R2 IC2R1 IC2R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 IC2R<4:0>: Assign Input Capture 2 (ECCP2) to the Corresponding RPn Pin bits
REGISTER 10-13: RPINR9: PERIPHERAL PIN SELECT INPUT REGISTER 9 (BANKED EEAh)
U-0 U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
— — — IC3R4 IC3R3 IC3R2 IC3R1 IC3R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 IC3R<4:0>: Assign Input Capture 3 (ECCP3) to the Corresponding RPn Pin bits
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REGISTER 10-14: RPINR12: PERIPHERAL PIN SELECT INPUT REGISTER 12 (BANKED EF2h)
U-0 U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
— — — T1GR4 T1GR3 T1GR2 T1GR1 T1GR0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 T1GR<4:0>: Timer1 Gate Input (T1G) to the Corresponding RPn Pin bits
REGISTER 10-15: RPINR13: PERIPHERAL PIN SELECT INPUT REGISTER 13 (BANKED EF3h)
U-0 U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
— — — T3GR4 T3GR3 T3GR2 T3GR1 T3GR0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 T3GR<4:0>: Timer3 Gate Input (T3G) to the Corresponding RPn Pin bits
REGISTER 10-16: RPINR14: PERIPHERAL PIN SELECT INPUT REGISTER 14 (BANKED EF4h)
U-0 U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
— — — T5GR4 T5GR3 T5GR2 T5GR1 T5GR0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 T5GR<4:0>: Timer5 Gate Input (T5G) to the Corresponding RPn Pin bits
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REGISTER 10-17: RPINR16: PERIPHERAL PIN SELECT INPUT REGISTER 16 (BANKED EF7h)
U-0 U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
— — — RX2DT2R4 RX2DT2R3 RX2DT2R2 RX2DT2R1 RX2DT2R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 RX2DT2R<4:0>: EUSART2 Synchronous/Asynchronous Receive (RX2/DT2) to the Corresponding
RPn Pin bits
REGISTER 10-18: RPINR15: PERIPHERAL PIN SELECT INPUT REGISTER 15 (BANKED EE7h)
U-0 U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
— — — T5CKR4 T5CKR3 T5CKR2 T5CKR1 T5CKR0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 T5CKR<4:0>: Timer5 External Clock Input (T5CKI) to the Corresponding RPn Pin bits
REGISTER 10-19: RPINR17: PERIPHERAL PIN SELECT INPUT REGISTER 17 (BANKED EF8h)
U-0 U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
— — — CK2R4 CK2R3 CK2R2 CK2R1 CK2R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 CK2R<4:0>: EUSART2 Clock Input (CK2) to the Corresponding RPn Pin bits
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REGISTER 10-20: RPINR21: PERIPHERAL PIN SELECT INPUT REGISTER 21 (BANKED EFCh)
U-0 U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
— — — SDI2R4 SDI2R3 SDI2R2 SDI2R1 SDI2R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 SDI2R<4:0>: Assign SPI2 Data Input (SDI2) to the Corresponding RPn Pin bits
REGISTER 10-21: RPINR22: PERIPHERAL PIN SELECT INPUT REGISTER 22 (BANKED EFDh)
U-0 U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
— — — SCK2R4 SCK2R3 SCK2R2 SCK2R1 SCK2R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 SCK2R<4:0>: Assign SPI2 Clock Input (SCK2) to the Corresponding RPn Pin bits
REGISTER 10-22: RPINR23: PERIPHERAL PIN SELECT INPUT REGISTER 23 (BANKED EFEh)
U-0 U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
— — — SS2R4 SS2R3 SS2R2 SS2R1 SS2R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 SS2R<4:0>: Assign SPI2 Slave Select Input (SS2) to the Corresponding RPn Pin bits
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REGISTER 10-23: RPINR24: PERIPHERAL PIN SELECT INPUT REGISTER 24 (BANKED EFFh)
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — OCFAR4 OCFAR3 OCFAR2 OCFAR1 OCFAR0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 OCFAR<4:0>: Assign PWM Fault Input (FLT0) to the Corresponding RPn Pin bits
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REGISTER 10-24: RPOR0: PERIP HERA L PIN SE LECT OUTPUT REGISTER 0 (BANKED EC1h)
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — RP0R4 RP0R3 RP0R2 RP0R1 RP0R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 RP0R<4:0>: Peripheral Output Function is Assigned to RP0 Output Pin bits
(see Table 10-14 for peripheral function numbers)
REGISTER 10-25: RPOR1: PERIP HERA L PIN SE LECT OUTPUT REGISTER 1 (BANKED EC7h)
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — RP1R4 RP1R3 RP1R2 RP1R1 RP1R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 RP1R<4:0>: Peripheral Output Function is Assigned to RP1 Output Pin bits
(see Table 10-14 for peripheral function numbers)
REGISTER 10-26: RPOR2: PERIP HERA L PIN SE LECT OUTPUT REGISTER 2 (BANKED EC3h)
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — RP2R4 RP2R3 RP2R2 RP2R1 RP2R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 RP2R<4:0>: Peripheral Output Function is Assigned to RP2 Output Pin bits
(see Table 10-14 for peripheral function numbers)
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REGISTER 10-27: RPOR3: PERIP HERA L PIN SE LECT OUTPUT REGISTER 3 (BANKED EC3h)
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — RP3R4 RP3R3 RP3R2 RP3R1 RP3R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 RP3R<4:0>: Peripheral Output Function is Assigned to RP3 Output Pin bits
(see Table 10-14 for peripheral function numbers)
REGISTER 10-28: RPOR4: PERIP HERA L PIN SE LECT OUTPUT REGISTER 4 (BANKED EC4h)
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — RP4R4 RP4R3 RP4R2 RP4R1 RP4R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 RP4R<4:0>: Peripheral Output Function is Assigned to RP4 Output Pin bits
(see Table 10-14 for peripheral function numbers)
REGISTER 10-29: RPOR5: PERIP HERA L PIN SE LECT OUTPUT REGISTER 5 (BANKED EC5h)
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — RP5R4 RP5R3 RP5R2 RP5R1 RP5R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 RP5R<4:0>: Peripheral Output Function is Assigned to RP5 Output Pin bits
(see Table 10-14 for peripheral function numbers)
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REGISTER 10-30: RPOR6: PERIP HERA L PIN SE LECT OUTPUT REGISTER 6 (BANKED EC6h)
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — RP6R4 RP6R3 RP6R2 RP6R1 RP6R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 RP6R<4:0>: Peripheral Output Function is Assigned to RP6 Output Pin bits
(see Table 10-14 for peripheral function numbers)
REGISTER 10-31: RPOR7: PERIP HERA L PIN SE LECT OUTPUT REGISTER 7 (BANKED EC7h)
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — RP7R4 RP7R3 RP7R2 RP7R1 RP7R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 RP7R<4:0>: Peripheral Output Function is Assigned to RP7 Output Pin bits
(see Table 10-14 for peripheral function numbers)
REGISTER 10-32: RPOR8: PERIP HERA L PIN SE LECT OUTPUT REGISTER 8 (BANKED EC8h)
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — RP8R4 RP8R3 RP8R2 RP8R1 RP8R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 RP8R<4:0>: Peripheral Output Function is Assigned to RP8 Output Pin bits
(see Table 10-14 for peripheral function numbers)
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REGISTER 10-33: RPOR9: PERIP HERA L PIN SE LECT OUTPUT REGISTER 9 (BANKED EC9h)
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — RP9R4 RP9R3 RP9R2 RP9R1 RP9R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 RP9R<4:0>: Peripheral Output Function is Assigned to RP9 Output Pin bits
(see Table 10-14 for peripheral function numbers)
REGISTER 10-34: RPOR10: PERIPHERAL PIN SELECT OUTPUT REGISTER 10 (BANKED ECAh)
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — RP10R4 RP10R3 RP10R2 RP10R1 RP10R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 RP10R<4:0>: Peripheral Output Function is Assigned to RP10 Output Pin bits
(see Table 10-14 for peripheral function numbers)
REGISTER 10-35: RPOR11: PERIPHERAL PIN SELECT OUTPUT REGISTER 11 (BANKED ECBh)
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — RP11R4 RP11R3 RP11R2 RP11R1 RP11R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 RP11R<4:0>: Peripheral Output Function is Assigned to RP11 Output Pin bits
(see Table 10-14 for peripheral function numbers)
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REGISTER 10-36: RPOR12: PERIPHERAL PIN SELECT OUTPUT REGISTER 12 (BANKED ECCh)
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — RP12R4 RP12R3 RP12R2 RP12R1 RP12R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 RP12R<4:0>: Peripheral Output Function is Assigned to RP12 Output Pin bits
(see Table 10-14 for peripheral function numbers)
REGISTER 10-37: RPOR13: PERIPHERAL PIN SELECT OUTPUT REGISTER 13 (BANKED ECDh)
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — RP13R4 RP13R3 RP13R2 RP13R1 RP13R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 RP13R<4:0>: Peripheral Output Function is Assigned to RP13 Output Pin bits
(see Table 10-14 for peripheral function numbers)
REGISTER 10-38: RPOR14: PERIPHERAL PIN SELECT OUTPUT REGISTER 14 (BANKED ECEh)
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — RP14R4 RP14R3 RP14R2 RP14R1 RP14R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 RP14R<4:0>: Peripheral Output Function is Assigned to RP14 Output Pin bits
(see Table 10-14 for peripheral function numbers)
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REGISTER 10-39: RPOR15: PERIPHERAL PIN SELECT OUTPUT REGISTER 15 (BANKED ECFh)
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — RP15R4 RP15R3 RP15R2 RP15R1 RP15R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 RP15R<4:0>: Peripheral Output Function is Assigned to RP15 Output Pin bits
(see Table 10-14 for peripheral function numbers)
REGISTER 10-40: RPOR16: PERIPHERAL PIN SELECT OUTPUT REGISTER 16 (BANKED ED0h)
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — RP16R4 RP16R3 RP16R2 RP16R1 RP16R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 RP16R<4:0>: Peripheral Output Function is Assigned to RP16 Output Pin bits
(see Table 10-14 for peripheral function numbers)
REGISTER 10-41: RPOR17: PERIPHERAL PIN SELECT OUTPUT REGISTER 17 (BANKED ED1h)
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — RP17R4 RP17R3 RP17R2 RP17R1 RP17R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 RP17R<4:0>: Peripheral Output Function is Assigned to RP17 Output Pin bits
(see Table 10-14 for peripheral function numbers)
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REGISTER 10-42: RPOR18: PERIPHERAL PIN SELECT OUTPUT REGISTER 18 (BANKED ED2h)
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — RP18R4 RP18R3 RP18R2 RP18R1 RP18R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 RP18R<4:0>: Peripheral Output Function is Assigned to RP18 Output Pin bits
(see Table 10-14 for peripheral function numbers)
REGISTER 10-43: RPOR19: PERIPHERAL PIN SELECT OUTPUT REGISTER 19 (BANKED ED3h)(1)
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — RP19R4 RP19R3 RP19R2 RP19R1 RP19R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 RP19R<4:0>: Peripheral Output Function is Assigned to RP19 Output Pin bits
(see Table 10-14 for peripheral function numbers)
Note 1: RP19 pins are not available on 28-pin devices.
REGISTER 10-44: RPOR20: PERIPHERAL PIN SELECT OUTPUT REGISTER 20 (BANKED ED4h)(1)
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — RP20R4 RP20R3 RP20R2 RP20R1 RP20R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 RP20R<4:0>: Peripheral Output Function is Assigned to RP20 Output Pin bits
(see Table 10-14 for peripheral function numbers)
Note 1: RP20 pins are not available on 28-pin devices.
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REGISTER 10-45: RPOR21: PERIPHERAL PIN SELECT OUTPUT REGISTER 21 (BANKED ED5h)(1)
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — RP21R4 RP21R3 RP21R2 RP21R1 RP21R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 RP21R<4:0>: Peripheral Output Function is Assigned to RP21 Output Pin bits
(see Table 10-14 for peripheral function numbers)
Note 1: RP21 pins are not available on 28-pin devices.
REGISTER 10-46: RPOR22: PERIPHERAL PIN SELECT OUTPUT REGISTER 22 (BANKED ED6h)(1)
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — RP22R4 RP22R3 RP22R2 RP22R1 RP22R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 RP22R<4:0>: Peripheral Output Function is Assigned to RP22 Output Pin bits
(see Table 10-14 for peripheral function numbers)
Note 1: RP22 pins are not available on 28-pin devices.
REGISTER 10-47: RPOR23: PERIPHERAL PIN SELECT OUTPUT REGISTER 23 (BANKED ED7h)(1)
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — RP23R4 RP23R3 RP23R2 RP23R1 RP23R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 RP23R<4:0>: Peripheral Output Function is Assigned to RP23 Output Pin bits
(see Table 10-14 for peripheral function numbers)
Note 1: RP23 pins are not available on 28-pin devices.
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REGISTER 10-48: RPOR24: PERIPHERAL PIN SELECT OUTPUT REGISTER 24 (BANKED ED8h)(1)
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — RP24R4 RP24R3 RP24R2 RP24R1 RP24R0
bit 7 bit 0
Legend: R/W = Readable bit, Writable bit if IOLOCK = 0
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 RP24R<4:0>: Peripheral Output Function is Assigned to RP24 Output Pin bits
(see Table 10-14 for peripheral function numbers)
Note 1: RP24 pins are not available on 28-pin devices.
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11.0 PARALLEL MASTER PORT
(PMP)
The Parallel Master Port module (PMP) is an 8-bit
parallel I/O module, specifically designed to communi-
cate with a wide variety of parallel devices, such as
communication peripherals, LCDs, external memory
devices and microcontrollers. Because the interface to
parallel peripherals varies significantly, the PMP is
highly configurable. The PMP module can be
configured to serve as either a PMP or as a Parallel
Slave Port (PSP).
Key features of the PMP module are:
• Up to 16 bits of Addressing when using
Data/Address Multiplexing
• Up to 8 Programmable Address Lines
• One Chip Select Line
• Programmable Strobe Options:
- Individual Read and Write Strobes or;
- Read/Write Strobe with Enable Strobe
• Address Auto-Increment/Auto-Decrement
• Programmable Address/Data Multiplexing
• Programmable Polarity on Control Signals
• Legacy Parallel Slave Port Support
• Enhanced Parallel Slave Support:
- Address Support
- 4-Byte Deep, Auto-Incrementing Buffer
• Programmable Wait States
• Selectable Input Voltage Levels
FIGURE 11-1: PMP MODULE OVERVIEW
Note: The PMP module is not implemented on
28-pin devices. It is available only
on the PIC18F46J13, PIC18F47J13,
PIC18LF46J13 and PIC18LF47J13.
PMA<0>
PMBE
PMRD
PMWR
PMD<7:0>
PMENB
PMRD/PMWR
PMCS
PMA<1>
PMA<7:2>
PMALL
PMALH
PMA<7:0>
EEPROM
Address Bus
Data Bus
Control Lines
PIC18
LCD FIFO
Microcontroller
8-Bit Data
Up to 8-Bit Address
Parallel Master Port
Buffer
PMA<15:8>
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11.1 Module Registers
The PMP module has a total of 14 Special Function
Registers (SFRs) for its operation, plus one additional
register to set configuration options. Of these, eight
registers are used for control and six are used for PMP
data transfer.
11.1.1 CONTROL REGISTERS
The eight PMP Control registers are:
• PMCONH and PMCONL
• PMMODEH and PMMODEL
• PMSTATL and PMSTATH
• PMEH and PMEL
The PMCON registers (Register 11-1 and
Register 11-2) control basic module operations, includ-
ing turning the module on or off. They also configure
address multiplexing and control strobe configuration.
The PMMODE registers (Register 11-3 and
Register 11-4) configure the various Master and Slave
modes, the data width and interrupt generation.
The PMEH and PMEL registers (Register 11-5 and
Register 11-6) configure the module’s operation at the
hardware (I/O pin) level.
The PMSTAT registers (Register 11-5 and
Register 11-6) provide status flags for the module’s
input and output buffers, depending on the operating
mode.
REGISTER 1 1-1: PMCONH: PARAL LEL PO RT CONTR OL REGISTE R HIGH BYTE (BANKED F5Fh)(1)
R/W-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
PMPEN — —
ADRMUX1 ADRMUX0
PTBEEN PTWREN PTRDEN
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 PMPEN: Parallel Master Port Enable bit
1 = PMP enabled
0 = PMP disabled, no off-chip access performed
bit 6-5 Unimplemented: Read as ‘0’
bit 4-3 ADRMUX<1:0>: Address/Data Multiplexing Selection bits
11 = Reserved
10 = All 16 bits of address are multiplexed on PMD<7:0> pins
01 = Lower 8 bits of address are multiplexed on PMD<7:0> pins (only eight bits of address are
available in this mode)
00 = Address and data appear on separate pins (only eight bits of address are available in this mode)
bit 2 PTBEEN: Byte Enable Port Enable bit (16-Bit Master mode)
1 = PMBE port enabled
0 = PMBE port disabled
bit 1 PTWREN: Write Enable Strobe Port Enable bit
1 = PMWR/PMENB port enabled
0 = PMWR/PMENB port disabled
bit 0 PTRDEN: Read/Write Strobe Port Enable bit
1 = PMRD/PMWR port enabled
0 = PMRD/PMWR port disabled
Note 1: This register is only available on 44-pin devices.
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REGISTER 11-2: PMCONL: PARALLEL PORT CONTROL REGISTER LOW BYTE (BANKED F5Eh)(1)
R/W-0 R/W-0 R/W-0(2) U-0 R/W-0(2) R/W-0 R/W-0 R/W-0
CSF1 CSF0 ALP — CS1P BEP WRSP RDSP
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-6 CSF<1:0>: Chip Select Function bits
11 = Reserved
10 = Chip select function is enabled and PMCS acts as chip select (in Master mode). Up to
13 address bits only can be generated.
01 = Reserved
00 = Chip select function is disabled (in Master mode). All 16 address bits can be generated.
bit 5 ALP: Address Latch Polarity bit(2)
1 = Active-high (PMALL and PMALH)
0 = Active-low (PMALL and PMALH)
bit 4 Unimplemented: Maintain as ‘0’
bit 3 CS1P: Chip Select Polarity bit(2)
1 = Active-high (PMCS)
0 =Active-low (PMCS
)
bit 2 BEP: Byte Enable Polarity bit
1 = Byte enable active-high (PMBE)
0 = Byte enable active-low (PMBE)
bit 1 WRSP: Write Strobe Polarity bit
For Slave modes and Master Mode 2 (PMMODEH<1:0> = 00,01,10):
1 = Write strobe active-high (PMWR)
0 = Write strobe active-low (PMWR)
For Master Mode 1 (PMMODEH<1:0> = 11):
1 = Enable strobe active-high (PMENB)
0 = Enable strobe active-low (PMENB)
bit 0 RDSP: Read Strobe Polarity bit
For Slave modes and Master Mode 2 (PMMODEH<1:0> = 00,01,10):
1 = Read strobe active-high (PMRD)
0 = Read strobe active-low (PMRD)
For Master Mode 1 (PMMODEH<1:0> = 11):
1 = Read/write strobe active-high (PMRD/PMWR)
0 = Read/write strobe active-low (PMRD/PMWR)
Note 1: This register is only available on 44-pin devices.
2: These bits have no effect when their corresponding pins are used as address lines.
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REGISTER 11-3: PMMODEH: PARALLEL PORT MODE REGISTER HIGH BYTE (BANKED F5Dh)(1)
R-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
BUSY IRQM1 IRQM0 INCM1 INCM0 MODE16 MODE1 MODE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 BUSY: Busy bit (Master mode only)
1 = Port is busy
0 = Port is not busy
bit 6-5 IRQM<1:0>: Interrupt Request Mode bits
11 = Interrupt generated when Read Buffer 3 is read or Write Buffer 3 is written (Buffered PSP mode)
or on a read or write operation when PMA<1:0> = 11 (Addressable PSP mode only)
10 = No interrupt generated, processor stall activated
01 = Interrupt generated at the end of the read/write cycle
00 = No interrupt generated
bit 4-3 INCM<1:0>: Increment Mode bits
11 = PSP read and write buffers auto-increment (Legacy PSP mode only)
10 = Decrement ADDR<15,13:0> by 1 every read/write cycle
01 = Increment ADDR<15,13:0> by 1 every read/write cycle
00 = No increment or decrement of address
bit 2 MODE16: 8/16-Bit Mode bit
1 = 16-bit mode: Data register is 16 bits; a read or write to the Data register invokes two 8-bit transfers
0 = 8-bit mode: Data register is 8 bits; a read or write to the Data register invokes one 8-bit transfer
bit 1-0 MODE<1:0>: Parallel Port Mode Select bits
11 = Master Mode 1 (PMCS, PMRD/PMWR, PMENB, PMBE, PMA<x:0> and PMD<7:0>)
10 = Master Mode 2 (PMCS, PMRD, PMWR, PMBE, PMA<x:0> and PMD<7:0>)
01 = Enhanced PSP, control signals (PMRD, PMWR, PMCS, PMD<7:0> and PMA<1:0>)
00 = Legacy Parallel Slave Port, control signals (PMRD, PMWR, PMCS and PMD<7:0>)
Note 1: This register is only available on 44-pin devices.
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REGISTER 11-4: PMMODEL: PARALLEL PORT MODE REGISTER LOW BYTE (BANKED F5Ch)(1)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
WAITB1(2) WAITB0(2) WAITM3 WAITM2 WAITM1 WAITM0 WAITE1(2) WAITE0(2)
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-6 WAITB<1:0>: Data Setup to Read/Write Wait State Configuration bits(2)
11 = Data Wait of 4 TCY; multiplexed address phase of 4 TCY
10 = Data Wait of 3 TCY; multiplexed address phase of 3 TCY
01 = Data Wait of 2 TCY; multiplexed address phase of 2 TCY
00 = Data Wait of 1 TCY; multiplexed address phase of 1 TCY
bit 5-2 WAITM<3:0>: Read to Byte Enable Strobe Wait State Configuration bits
1111 = Wait of additional 15 TCY
.
.
.
0001 = Wait of additional 1 T
CY
0000 = No additional Wait cycles (operation forced into one TCY)
bit 1-0 WAITE<1:0>: Data Hold After Strobe Wait State Configuration bits(2)
11 = Wait of 4 TCY
10 = Wait of 3 TCY
01 = Wait of 2 TCY
00 = Wait of 1 TCY
Note 1: This register is only available on 44-pin devices.
2: WAITBx and WAITEx bits are ignored whenever WAITM<3:0> = 0000.
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REGISTER 11-5: PMEH: PARALLEL PORT ENABLE REGISTER HIGH BYTE (BANKED F57h)(1)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
PTEN15 PTEN14 PTEN13 PTEN12 PTEN11 PTEN10 PTEN9 PTEN8
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-6 PTEN<15:14>: PMCS Port Enable bits
1 = PMA<15:14> function as either PMA<15:14> or PMCS
0 = PMA<15:14> function as port I/O
bit 5-0 PTEN<13:8>: PMP Address Port Enable bits
1 = PMA<13:8> function as PMP address lines
0 = PMA<13:8> function as port I/O
Note 1: This register is only available on 44-pin devices.
REGISTER 11-6: PMEL: PARALLEL PORT ENABLE REGISTER LOW BYTE (BANKED F56h)(1)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
PTEN7 PTEN6 PTEN5 PTEN4 PTEN3 PTEN2 PTEN1 PTEN0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-2 PTEN<7:2>: PMP Address Port Enable bits
1 = PMA<7:2> function as PMP address lines
0 = PMA<7:2> function as port I/O
bit 1-0 PTEN<1:0>: PMALH/PMALL Strobe Enable bits
1 = PMA<1:0> function as either PMA<1:0> or PMALH and PMALL
0 = PMA<1:0> pads functions as port I/O
Note 1: This register is only available on 44-pin devices.
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REGISTER 11-7: PMSTATH: PARALLEL PORT ST ATUS REGISTER HIGH BYTE (BANKED F55h)(1)
R-0 R/W-0 U-0 U-0 R-0 R-0 R-0 R-0
IBF IBOV —— IB3F IB2F IB1F IB0F
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 IBF: Input Buffer Full Status bit
1 = All writable Input Buffer registers are full
0 = Some or all of the writable Input Buffer registers are empty
bit 6 IBOV: Input Buffer Overflow Status bit
1 = A write attempt to a full Input Byte register occurred (must be cleared in software)
0 = No overflow occurred
bit 5-4 Unimplemented: Read as ‘0’
bit 3-0 IB<3:0>F: Input Buffer x Status Full bits
1 = Input buffer contains data that has not been read (reading the buffer will clear this bit)
0 = Input buffer does not contain any unread data
Note 1: This register is only available on 44-pin devices.
REGISTER 11-8: PMSTATL: PARALLEL PORT STATUS REGISTER LOW BYTE (BANKED F54h)(1)
R-1 R/W-0 U-0 U-0 R-1 R-1 R-1 R-1
OBE OBUF —— OB3E OB2E OB1E OB0E
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 OBE: Output Buffer Empty Status bit
1 = All readable Output Buffer registers are empty
0 = Some or all of the readable Output Buffer registers are full
bit 6 OBUF: Output Buffer Underflow Status bit
1 = A read occurred from an empty Output Byte register (must be cleared in software)
0 = No underflow occurred
bit 5-4 Unimplemented: Read as ‘0’
bit 3-0 OB<3:0>E: Output Buffer x Status Empty bits
1 = Output buffer is empty (writing data to the buffer will clear this bit)
0 = Output buffer contains data that has not been transmitted
Note 1: This register is only available on 44-pin devices.
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11.1.2 DATA REGISTERS
The PMP module uses eight registers for transferring
data into and out of the microcontroller. They are
arranged as four pairs to allow the option of 16-bit data
operations:
• PMDIN1H and PMDIN1L
• PMDIN2H and PMDIN2L
• PMADDRH/PMDOUT1H and PMADDRL/PMDOUT1L
• PMDOUT2H and PMDOUT2L
The PMDIN1 registers are used for incoming data in
Slave modes, and both input and output data in Master
modes. The PMDIN2 registers are used for buffering
input data in select Slave modes.
The PMADDR/PMDOUT1 registers are actually a
single register pair; the name and function are dictated
by the module’s operating mode. In Master modes, the
registers function as the PMADDRH and PMADDRL
registers, and contain the address of any incoming or
outgoing data. In Slave modes, the registers function
as PMDOUT1H and PMDOUT1L, and are used for
outgoing data.
PMADDRH differs from PMADDRL in that it can also
have limited PMP control functions. When the module is
operating in select Master mode configurations, the
upper two bits of the register can be used to determine
the operation of chip select signals. If these are not
used, PMADDR simply functions to hold the upper 8 bits
of the address. Register 11-9 provides the function of
the individual bits in PMADDRH.
The PMDOUT2H and PMDOUT2L registers are only
used in Buffered Slave modes and serve as a buffer for
outgoing data.
11.1.3 PAD CONFIGURATION CONTROL
REGISTER
In addition to the module level configuration options,
the PMP module can also be configured at the I/O pin
for electrical operation. This option allows users to
select either the normal Schmitt Trigger input buffer on
digital I/O pins shared with the PMP, or use TTL level
compatible buffers instead. Buffer configuration is
controlled by the PMPTTL bit in the PADCFG1 register.
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REGISTER 11-9: PMADDRH: PARALLEL PORT ADDRESS REGISTER HIGH BYTE
(MASTER MODES ONLY) (ACCESS F6Fhh)(1)
U0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— CS1 Parallel Master Port Address High Byte<13:8>
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’ r = Reserved
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 Unimplemented: Read as ‘0’
bit 6 CS1: Chip Select bit
If PMCON<7:6> = 10:
1 = Chip select is active
0 = Chip select is inactive
If PMCON<7:6> = 11 or 00:
Bits function as ADDR<14>.
bit 5-0 Parallel Master Port Address: High Byte<13:8> bits
Note 1: In Enhanced Slave mode, PMADDRH functions as PMDOUT1H, one of the Output Data Buffer registers.
REGISTER 11-10: PMADDRL: PARALLEL PORT ADDRESS REGISTER LOW BYTE
(MASTER MODES ONLY) (ACCESS F6Eh)(1)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
Parallel Master Port Address Low Byte<7:0>
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’ r = Reserved
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-0 Parallel Master Port Address: Low Byte<7:0> bits
Note 1: In Enhanced Slave mode, PMADDRL functions as PMDOUT1L, one of the Output Data Buffer registers.
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11.2 Slave Port Modes
The primary mode of operation for the module is
configured using the MODE<1:0> bits in the
PMMODEH register. The setting affects whether the
module acts as a slave or a master and it determines
the usage of the control pins.
11.2.1 LEGACY MODE (PSP)
In Legacy mode (PMMODEH<1:0> = 00 and
PMPEN = 1), the module is configured as a Parallel
Slave Port (PSP) with the associated enabled module
pins dedicated to the module. In this mode, an external
device, such as another microcontroller or micro-
processor, can asynchronously read and write data
using the 8-bit data bus (PMD<7:0>), the read (PMRD),
write (PMWR) and chip select (PMCS) inputs. It acts as
a slave on the bus and responds to the read/write
control signals.
Figure 11-2 displays the connection of the PSP.
When chip select is active and a write strobe occurs
(PMCS = 1 and PMWR = 1), the data from
PMD<7:0> is captured into the PMDIN1L register.
FIGURE 11-2: LEGACY PARALLEL SLAVE PORT EXAMPLE
PMD<7:0>
PMRD
PMWR
Master Address Bus
Data Bus
Control Lines
PMCS
PMD<7:0>
PMRD
PMWR
PIC18 Slave
PMCS
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11.2.2 WRITE TO SLAVE PORT
When chip select is active and a write strobe occurs
(PMCS = 1 and PMWR = 1), the data from PMD<7:0>
is captured into the lower PMDIN1L register. The
PMPIF and IBF flag bits are set when the write
ends.The timing for the control signals in Write mode is
displayed in Figure 11-3. The polarity of the control
signals are configurable.
11.2.3 READ FROM SLAVE PORT
When chip select is active and a read strobe occurs
(PMCS = 1 and PMRD = 1), the data from the
PMDOUT1L register (PMDOUT1L<7:0>) is presented
on to PMD<7:0>. Figure 11-4 provides the timing for
the control signals in Read mode.
FIGUR E 11-3: PARALLEL SLAVE PORT WRITE WAVEFORMS
FIGURE 11-4: PARALLEL SLAVE PORT READ WAVEFORMS
PMCS
| Q4 | Q1 | Q2 | Q3 | Q4
PMWR
PMRD
PMD<7:0>
IBF
OBE
PMPIF
PMCS
| Q4 | Q1 | Q2 | Q3 | Q4
PMWR
PMRD
PMD<7:0>
IBF
OBE
PMPIF
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11.2.4 BUFFERED PARALLEL SLAVE
PORT MODE
Buffered Parallel Slave Port mode is functionally
identical to the Legacy PSP mode with one exception,
the implementation of 4-level read and write buffers.
Buffered PSP mode is enabled by setting the INCM bits
in the PMMODEH register. If the INCM<1:0> bits are
set to ‘11’, the PMP module will act as the buffered
PSP.
When the Buffered PSP mode is active, the PMDIN1L,
PMDIN1H, PMDIN2L and PMDIN2H registers become
the write buffers and the PMDOUT1L, PMDOUT1H,
PMDOUT2L and PMDOUT2H registers become the
read buffers. Buffers are numbered, 0 through 3, start-
ing with the lower byte of PMDIN1L to PMDIN2H as the
read buffers and PMDOUT1L to PMDOUT2H as the
write buffers.
11.2.4.1 READ FROM SLAVE PORT
For read operations, the bytes will be sent out
sequentially, starting with Buffer 0 (PMDOUT1L<7:0>)
and ending with Buffer 3 (PMDOUT2H<7:0>) for every
read strobe. The module maintains an internal pointer
to keep track of which buffer is to be read. Each buffer
has a corresponding read status bit, OBxE, in the
PMSTATL register. This bit is cleared when a buffer
contains data that has not been written to the bus and
is set when data is written to the bus. If the current buf-
fer location being read from is empty, a buffer underflow
is generated and the Buffer Overflow Flag bit, OBUF, is
set. If all four OBxE status bits are set, then the Output
Buffer Empty flag (OBE) will also be set.
11.2.4.2 WRITE TO SLAVE PORT
For write operations, the data has to be stored
sequentially, starting with Buffer 0 (PMDIN1L<7:0>)
and ending with Buffer 3 (PMDIN2H<7:0>). As with
read operations, the module maintains an internal
pointer to the buffer that is to be written next.
The input buffers have their own write status bits: IBxF
in the PMSTATH register. The bit is set when the buffer
contains unread incoming data and cleared when the
data has been read. The flag bit is set on the write
strobe. If a write occurs on a buffer when its associated
IBxF bit is set, the Buffer Overflow flag, IBOV, is set;
any incoming data in the buffer will be lost. If all four
IBxF flags are set, the Input Buffer Full Flag (IBF) is set.
In Buffered Slave mode, the module can be configured
to generate an interrupt on every read or write strobe
(IRQM<1:0> = 01). It can be configured to generate an
interrupt on a read from Read Buffer 3 or a write to
Write Buffer 3, which is essentially an interrupt every
fourth read or write strobe (RQM<1:0> = 11). When
interrupting every fourth byte for input data, all Input
Buffer registers should be read to clear the IBxF flags.
If these flags are not cleared, then there is a risk of
hitting an overflow condition.
FIGURE 11-5: PARALLEL MASTER/SLAVE CONNECTION BUFFERED EXAMPLE
PMD<7:0>
PMRD
PMWR
PMCS
Data Bus
Control Lines
PMRD
PMWR
PIC18 Slave
PMCS
PMDOUT1L (0)
PMDOUT1H (1)
PMDOUT2L (2)
PMDOUT2H (3)
PMDIN1L (0)
PMDIN1H (1)
PMDIN2L (2)
PMDIN2H (3)
PMD<7:0> Write
Address
Pointer
Read
Address
Pointer
Master
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11.2.5 ADDRESSABLE PARALLEL SLAVE
PORT MODE
In the Addressable Parallel Slave Port mode
(PMMODEH<1:0> = 01), the module is configured with
two extra inputs, PMA<1:0>, which are the Address
Lines 1 and 0. This makes the 4-byte buffer space
directly addressable as fixed pairs of read and write
buffers. As with Legacy Buffered mode, data is output
from PMDOUT1L, PMDOUT1H, PMDOUT2L and
PMDOUT2H, and is read in PMDIN1L, PMDIN1H,
PMDIN2L and PMDIN2H. Table 11-1 provides the
buffer addressing for the incoming address to the input
and output registers.
TABLE 11-1: SLAVE MODE BUFFER
ADDRESSING
FIGURE 11-6: PARALLEL MASTE R/SLA VE CONNECTION ADDRESSED BUFFER EXAMPLE
11.2.5.1 READ FROM SLAVE PORT
When chip select is active and a read strobe occurs
(PMCS = 1 and PMRD = 1), the data from one of the
four output bytes is presented onto PMD<7:0>. Which
byte is read depends on the 2-bit address placed on
ADDR<1:0>. Table 11-1 provides the corresponding
output registers and their associated address. When an
output buffer is read, the corresponding OBxE bit is set.
The OBxE flag bit is set when all the buffers are empty.
If any buffer is already empty (OBxE = 1), the next read
to that buffer will generate an OBUF event.
FIGURE 11-7: PARALLEL SLAVE PORT READ WAVEFORMS
PMA<1:0> Output
Register
(Buffer)
Input Register
(Buffer)
00 PMDOUT1L (0) PMDIN1L (0)
01 PMDOUT1H (1) PMDIN1H (1)
10 PMDOUT2L (2) PMDIN2L (2)
11 PMDOUT2H((3) PMDIN2H (3)
PMD<7:0>
PMRD
PMWR
Master
PMCS
PMA<1:0>
Address Bus
Data Bus
Control Lines
PMRD
PMWR
PIC18F Slave
PMCS
PMDOUT1L (0)
PMDOUT1H (1)
PMDOUT2L (2)
PMDOUT2H (3)
PMDIN1L (0)
PMDIN1H (1)
PMDIN2L (2)
PMDIN2H (3)
PMD<7:0> Write
Address
Decode
Read
Address
Decode
PMA<1:0>
| Q4 | Q1 | Q2 | Q3 | Q4
PMCS
PMWR
PMRD
PMD<7:0>
PMA<1:0>
OBE
PMPIF
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11.2.5.2 WRITE TO SLAVE PORT
When chip select is active and a write strobe occurs
(PMCS = 1 and PMWR = 1), the data from PMD<7:0>
is captured into one of the four input buffer bytes.
Which byte is written depends on the 2-bit address
placed on ADDRL<1:0>.
Table 11-1 provides the corresponding input registers
and their associated address.
When an input buffer is written, the corresponding IBxF
bit is set. The IBF flag bit is set when all the buffers are
written. If any buffer is already written (IBxF = 1), the
next write strobe to that buffer will generate an OBUF
event and the byte will be discarded.
FIGUR E 11-8: PARALLEL SLAVE PORT WRITE WAVEFORMS
PMCS
| Q4 | Q1 | Q2 | Q3 | Q4
PMWR
PMRD
PMD<7:0>
IBF
PMPIF
PMA<1:0>
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11.3 MASTER PORT MODES
In its Master modes, the PMP module provides an 8-bit
data bus, up to 16 bits of address, and all the necessary
control signals to operate a variety of external parallel
devices, such as memory devices, peripherals and
slave microcontrollers. To use the PMP as a master,
the module must be enabled (PMPEN = 1) and the
mode must be set to one of the two possible Master
modes (PMMODEH<1:0> = 10 or 11).
Because there are a number of parallel devices with a
variety of control methods, the PMP module is designed
to be extremely flexible to accommodate a range of
configurations. Some of these features include:
• 8-Bit and 16-Bit Data modes on an 8-bit data bus
• Configurable address/data multiplexing
• Up to two chip select lines
• Up to 16 selectable address lines
• Address auto-increment and auto-decrement
• Selectable polarity on all control lines
• Configurable Wait states at different stages of the
read/write cycle
11.3.1 PMP AND I/O PIN CONTROL
Multiple control bits are used to configure the presence
or absence of control and address signals in the
module. These bits are PTBEEN, PTWREN, PTRDEN
and PTEN<15:0>. They give the user the ability to con-
serve pins for other functions and allow flexibility to
control the external address. When any one of these
bits is set, the associated function is present on its
associated pin; when clear, the associated pin reverts
to its defined I/O port function.
Setting a PTENx bit will enable the associated pin as
an address pin and drive the corresponding data
contained in the PMADDR register. Clearing a PTENx
bit will force the pin to revert to its original I/O function.
For the pins configured as chip select (PMCS) with the
corresponding PTENx bit set, the PTEN0 and PTEN1
bits will also control the PMALL and PMALH signals.
When multiplexing is used, the associated address
latch signals should be enabled.
11.3.2 READ/WRITE-CONTROL
The PMP module supports two distinct read/write
signaling methods. In Master Mode 1, read and write
strobes are combined into a single control line,
PMRD/PMWR. A second control line, PMENB, deter-
mines when a read or write action is to be taken. In
Master Mode 2, separate read and write strobes
(PMRD and PMWR) are supplied on separate pins.
All control signals (PMRD, PMWR, PMBE, PMENB,
PMAL and PMCS) can be individually configured as
either positive or negative polarity. Configuration is
controlled by separate bits in the PMCONL register.
Note that the polarity of control signals that share the
same output pin (for example, PMWR and PMENB) are
controlled by the same bit; the configuration depends
on which Master Port mode is being used.
11.3.3 DATA WIDTH
The PMP supports data widths of both 8 bits and
16 bits. The data width is selected by the MODE16 bit
(PMMODEH<2>). Because the data path into and out
of the module is only 8 bits wide, 16-bit operations are
always handled in a multiplexed fashion, with the Least
Significant Byte (LSB) of data being presented first. To
differentiate data bytes, the byte enable control strobe,
PMBE, is used to signal when the Most Significant Byte
(MSB) of data is being presented on the data lines.
11.3.4 ADDRESS MULTIPLEXING
In either of the Master modes (PMMODEH<1:0> = 1x),
the user can configure the address bus to be multiplexed
together with the data bus. This is accomplished by
using the ADRMUX<1:0> bits (PMCONH<4:3>). There
are three address multiplexing modes available. Typical
pinout configurations for these modes are displayed in
Figure 11-9, Figure 11-10 and Figure 11-11.
In Demultiplexed mode (PMCONH<4:3> = 00), data and
address information are completely separated. Data bits
are presented on PMD<7:0>, and address bits are
presented on PMADDRH<6:0> and PMADDRL<7:0>.
In Partially Multiplexed mode (PMCONH<4:3> = 01), the
lower eight bits of the address are multiplexed with the
data pins on PMD<7:0>. The upper eight bits of the
address are unaffected and are presented on
PMADDRH<6:0>. The PMA0 pin is used as an address
latch and presents the Address Latch Low (PMALL)
enable strobe. The read and write sequences are
extended by a complete CPU cycle during which the
address is presented on the PMD<7:0> pins.
In Fully Multiplexed mode (PMCONH<4:3> = 10), the
entire 16 bits of the address are multiplexed with the
data pins on PMD<7:0>. The PMA0 and PMA1 pins are
used to present Address Latch Low (PMALL) enable
and Address Latch High (PMALH) enable strobes,
respectively. The read and write sequences are
extended by two complete CPU cycles. During the first
cycle, the lower eight bits of the address are presented
on the PMD<7:0> pins with the PMALL strobe active.
During the second cycle, the upper eight bits of the
address are presented on the PMD<7:0> pins with the
PMALH strobe active. In the event the upper address
bits are configured as chip select pins, the
corresponding address bits are automatically forced
to ‘0’.
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FIGUR E 11-9: DEMULTIPLEXED ADDRESSING MODE
(SEPARATE READ AND WRITE STROBES WITH CHIP SELECT)
FIGURE 11-10: PARTIALLY MULTIPLEXED ADDRESSING MODE
(SEPARATE READ AND WRITE STROBES WITH CHIP SELECT)
FIGURE 11-11: FULLY MULTIPLEXED ADDRESSING MODE
(SEPARATE READ AND WRITE STROBES WITH CHIP SELECT)
PMRD
PMWR
PMD<7:0>
PMCS
PMA<7:0>
PIC18F
Address Bus
Data Bus
Control Lines
PMRD
PMWR
PMD<7:0>
PMCS
PMALL
PMA<7:0>
PIC18F
Address Bus
Multiplexed
Data and
Address Bus
Control Lines
PMRD
PMWR
PMD<7:0>
PMCS
PMALH
PMA<13:8>
PIC18F
Multiplexed
Data and
Address Bus
Control Lines
PMALL
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11.3.5 CHIP SELECT FEATURES
A chip select line, PMCS, is available for the Master
modes of the PMP. The chip select line is multiplexed
with the second Most Significant bit (MSb) of the
address bus (PMADDRH<6>). When configured for
chip select, the PMADDRH<7:6> bits are not included
in any address auto-increment/decrement. The func-
tion of the chip select signal is configured using the chip
select function bits (PMCONL<7:6>).
11.3.6 AUTO-INCREMENT/DECREMENT
While the module is operating in one of the Master
modes, the INCMx bits (PMMODEH<4:3>) control the
behavior of the address value. The address can be
made to automatically increment or decrement after
each read and write operation. The address increments
once each operation is completed and the BUSY bit
goes to ‘0’. If the chip select signals are disabled and
configured as address bits, the bits will participate in
the increment and decrement operations; otherwise,
the CS1 bit values will be unaffected.
11.3.7 WAIT STATES
In Master mode, the user has control over the duration
of the read, write and address cycles by configuring the
module Wait states. Three portions of the cycle, the
beginning, middle and end, are configured using the
corresponding WAITBx, WAITMx and WAITEx bits in
the PMMODEL register.
The WAITBx bits (PMMODEL<7:6>) set the number of
Wait cycles for the data setup prior to the
PMRD/PMWT strobe in Mode 10, or prior to the
PMENB strobe in Mode 11. The WAITMx bits
(PMMODEL<5:2>) set the number of Wait cycles for
the PMRD/PMWT strobe in Mode 10, or for the PMENB
strobe in Mode 11. When this Wait state setting is ‘0’,
then WAITB and WAITE have no effect. The WAITE
bits (PMMODEL<1:0>) define the number of Wait
cycles for the data hold time after the PMRD/PMWT
strobe in Mode 10 or after the PMENB strobe in
Mode 11.
11.3.8 READ OPERATION
To perform a read on the PMP, the user reads the
PMDIN1L register. This causes the PMP to output the
desired values on the chip select lines and the address
bus. Then, the read line (PMRD) is strobed. The read
data is placed into the PMDIN1L register.
If the 16-bit mode is enabled (MODE16 = 1), the read
of the low byte of the PMDIN1L register will initiate two
bus reads. The first read data byte is placed into the
PMDIN1L register and the second read data byte is
placed into the PMDIN1H.
Note that the read data obtained from the PMDIN1L
register is actually the read value from the previous
read operation. Hence, the first user read will be a
dummy read to initiate the first bus read and fill the read
register. Also, the requested read value will not be
ready until after the BUSY bit is observed low. Thus, in
a back-to-back read operation, the data read from the
register will be the same for both reads. The next read
of the register will yield the new value.
11.3.9 WRITE OPERATION
To perform a write onto the parallel bus, the user writes
to the PMDIN1L register. This causes the module to
first output the desired values on the chip select lines
and the address bus. The write data from the PMDIN1L
register is placed onto the PMD<7:0> data bus. Then,
the write line (PMWR) is strobed. If the 16-bit mode is
enabled (MODE16 = 1), the write to the PMDIN1L
register will initiate two bus writes. The first write will
consist of the data contained in PMDIN1L and the
second write will contain the PMDIN1H.
11.3.10 PARALLEL MASTER PORT STATUS
11.3.10.1 The BUSY Bit
In addition to the PMP interrupt, a BUSY bit is provided
to indicate the status of the module. This bit is used
only in Master mode. While any read or write operation
is in progress, the BUSY bit is set for all but the very last
CPU cycle of the operation. In effect, if a single-cycle
read or write operation is requested, the BUSY bit will
never be active. This allows back-to-back transfers.
While the bit is set, any request by the user to initiate a
new operation will be ignored (i.e., writing or reading
the lower byte of the PMDIN1L register will neither
initiate a read nor a write).
11.3.10.2 Interrupts
When the PMP module interrupt is enabled for Master
mode, the module will interrupt on every completed
read or write cycle; otherwise, the BUSY bit is available
to query the status of the module.
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11.3.11 MASTER MODE TIMING
This section contains a number of timing examples that
represent the common Master mode configuration
options. These options vary from 8-bit to 16-bit data,
fully demultiplexed to fully multiplexed address and
Wait states.
FIGURE 11-12: READ AND WRITE TIMING, 8-BIT DATA, DEMULTIPLEXED ADDRESS
FIGURE 11-13: READ TIMING, 8-BIT DATA, PARTIALLY MULTIPLEXED ADDRESS
FIGURE 11-14: READ TIMING, 8-BIT DATA, WAIT STATES ENABLED,
PARTIALLY MULTIPLEXED ADDRESS
PMWR
PMRD
PMPIF
PMD<7:0>
PMCS
PMA<7:0>
Q2 Q3 Q4Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4Q1Q2 Q3 Q4Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4Q1
BUSY
Q2 Q3 Q4Q1
PMWR
PMRD
PMALL
PMD<7:0>
PMCS
Q2 Q3 Q4Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4Q1Q2 Q3 Q4Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4Q1
PMPIF
BUSY
Address<7:0> Data
PMRD
PMWR
PMALL
PMD<7:0>
PMCS
Q1- - -
PMPIF
Q1- - - Q1- - - Q1- - - Q1- - - Q1- - - Q1- - - Q1- - - Q1- - - Q1- - - Q1- - - Q1- - - Q1- - - Q1- - -
WAITM<3:0> = 0010
WAITE<1:0> = 00
WAITB<1:0> = 01
BUSY
Address<7:0> Data
2010 Microchip Technology Inc. Preliminary DS39974A-page 197
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FIGURE 11-15: WRITE TIMING, 8-BIT DATA, PARTIALLY MULTIPLEXED ADDRESS
FIGURE 11-16: WRITE TIMING, 8-BIT DATA, WAIT STATES ENABLED,
PARTIALLY MULTIPLEXED ADDRESS
FIGURE 11-17: READ TIMING, 8-BIT DATA, PARTIALLY MULTIPLEXED ADDRESS,
ENABLE STROBE
PMWR
PMRD
PMALL
PMD<7:0>
PMCS
Q2 Q3 Q4Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4Q1Q2 Q3 Q4Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4Q1
PMPIF
Data
BUSY
Address<7:0>
PMWR
PMRD
PMALL
PMD<7:0>
PMCS
Q1- - -
PMPIF
Data
Q1- - - Q1- - - Q1- - - Q1- - - Q1- - - Q1- - - Q1- - - Q1- - - Q1- - - Q1- - - Q1- - - Q1- - - Q1- - -
WAITM<3:0> = 0010
WAITE<1:0> = 00
WAITB<1:0> = 01
BUSY
Address<7:0>
PMRD/PMWR
PMENB
PMALL
PMD<7:0>
PMCS
Q2 Q3 Q4Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4Q1Q2 Q3 Q4Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4Q1
PMPIF
BUSY
Address<7:0> Data
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DS39974A-page 198 Preliminary 2010 Microchip Technology Inc.
FIGURE 11-18: WRITE TIMING, 8-BIT DATA, PARTIALLY MULTIPLEXED ADDRESS,
ENABLE STROBE
FIGURE 11-19: READ TIMING, 8-BIT DATA, FULLY MULTIPLEXED 16-BIT ADDRESS
FIGURE 11-20: WRITE TIMING, 8-BIT DATA, FULLY MULTIPLEXED 16-BIT ADDRESS
PMRD/PMWR
PMENB
PMALL
PMD<7:0>
PMCS
Q2 Q3 Q4Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4Q1Q2 Q3 Q4Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4Q1
PMPIF
Data
BUSY
Address<7:0>
PMWR
PMRD
PMALL
PMD<7:0>
PMCS
Q2 Q3 Q4Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4Q1Q2 Q3 Q4Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4Q1
PMALH
Data
PMPIF
BUSY
Address<7:0> Address<13:8>
PMWR
PMRD
PMALL
PMD<7:0>
PMCS
Q2 Q3 Q4Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4Q1Q2 Q3 Q4Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4Q1
PMALH
Data
PMPIF
BUSY
Address<7:0> Address<13:8>
2010 Microchip Technology Inc. Preliminary DS39974A-page 199
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FIGURE 11-21: READ TIMING, 16-BIT DATA, DEMULTIPLEXED ADDRESS
FIGURE 11-22: WRITE TIMING, 16-BIT DATA, DEMULTIPLEXED ADDRESS
FIGURE 11-23: READ TIMI NG, 16-BIT MULTIPLEXED DAT A , PARTIALLY MULTIPLEXED ADD RESS
PMWR
PMRD
PMD<7:0>
PMCS
PMA<7:0>
Q2 Q3 Q4Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4Q1Q2 Q3 Q4Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4Q1
PMPIF
PMBE
BUSY
MSBLSB
PMWR
PMRD
PMD<7:0>
PMCS
PMA<7:0>
Q2 Q3 Q4Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4Q1Q2 Q3 Q4Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4Q1
PMPIF
LSB MSB
PMBE
BUSY
PMWR
PMRD
PMALL
PMD<7:0>
PMCS
Q2 Q3 Q4Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4Q1Q2 Q3 Q4Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4Q1
PMPIF
PMBE
BUSY
Address<7:0> LSB MSB
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DS39974A-page 200 Preliminary 2010 Microchip Technology Inc.
FIGURE 11-24: WRITE TIMING, 16-BIT MULTIPLEXED DATA,
PARTIALLY MULTIPLEXED ADDRESS
FIGURE 11-25: READ TIMING, 16-BIT MULTIPLEXED DATA,
FULLY MULTIPLEXED 16-BIT ADDRESS
FIGURE 11-26: WRITE TIMING, 16-BIT MULTIPLEXED DATA,
FULLY MULTIPLEXED 16-BIT ADDRESS
PMWR
PMRD
PMALL
PMD<7:0>
PMCS
Q2 Q3 Q4Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4Q1Q2 Q3 Q4Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4Q1
PMPIF
LSB MSB
PMBE
BUSY
Address<7:0>
PMWR
PMRD
PMBE
PMD<7:0>
PMCS
Q2 Q3 Q4Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4Q1Q2 Q3 Q4Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4Q1
PMALH
PMPIF
PMALL
BUSY
Q2 Q3 Q4Q1
Address<7:0> LSBAddress<13:8> MSB
PMWR
PMRD
PMBE
PMD<7:0>
PMCS
Q2 Q3 Q4Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4Q1Q2 Q3 Q4Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4Q1
PMALH
PMALL
MSBLSB
PMPIF
BUSY
Q2 Q3 Q4Q1
Address<7:0> Address<13:8>
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11.4 Application Examples
This section introduces some potential applications for
the PMP module.
11.4.1 MULTIPLEXED MEMORY OR
PERIPHERAL
Figure 11-27 demonstrates the hookup of a memory or
another addressable peripheral in Full Multiplex mode.
Consequently, this mode achieves the best pin saving
from the microcontroller perspective. However, for this
configuration, there needs to be some external latches
to maintain the address.
FIGURE 11-27: MULTIPLEXED ADDRESSING APPLICATION EXAMPLE
11.4.2 PARTIALLY MULTIPLEXED
MEMORY OR PERIPHERAL
Partial multiplexing implies using more pins; however,
for a few extra pins, some extra performance can be
achieved. Figure 11-28 provides an example of a
memory or peripheral that is partially multiplexed with
an external latch. If the peripheral has internal latches,
as displayed in Figure 11-29, then no extra circuitry is
required except for the peripheral itself.
FIGURE 11-28: EXAMPLE OF A PA RTIALLY MU LTIPLEXED A DDRES SING A PPLICATION
FIGURE 11-29: EXAMPLE OF AN 8 -BIT MU LTIPLEXED A DDRESS A ND DATA APPLICATION
PMD<7:0>
PMALH
D<7:0>
373 A<13:0>
D<7:0>
A<7:0>
373
PMRD
PMWR
OE WR
CE
PIC18F
Address Bus
Data Bus
Control Lines
PMCS
PMALL
A<15:8>
D<7:0>
373 A<7:0>
D<7:0>
A<7:0>
PMRD
PMWR
OE WR
CE
PIC18F
Address Bus
Data Bus
Control Lines
PMCS
PMALL
PMD<7:0>
ALE
PMRD
PMWR
RD
WR
CS
PIC18F
Address Bus
Data Bus
Control Lines
PMCS
PMALL
AD<7:0>
Parallel Peripheral
PMD<7:0>
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DS39974A-page 202 Preliminary 2010 Microchip Technology Inc.
11.4.3 PARALLEL EEPROM EXAMPLE
Figure 11-30 provides an example connecting parallel
EEPROM to the PMP. Figure 11-31 demonstrates a
slight variation to this, configuring the connection for
16-bit data from a single EEPROM.
FIGURE 11-30: PARALLEL EEPROM EXAMPLE (UP TO 15-BIT ADDRESS, 8-BIT DATA)
FIGURE 11-31: PARALLEL EEPROM EXAMPLE (UP TO 15-BIT ADDRESS, 16-BIT DATA)
11.4.4 LCD CONTROLLER EXAMPLE
The PMP module can be configured to connect to a
typical LCD controller interface, as displayed in
Figure 11-32. In this case the PMP module is config-
ured for active-high control signals since common LCD
displays require active-high control.
FIGURE 11-32: LCD CONTROL EXAMPLE (BYTE MODE OPERATION)
PMA<n:0> A<n:0>
D<7:0>
PMRD
PMWR
OE
WR
CE
PIC18F
Address Bus
Data Bus
Control Lines
PMCS
PMD<7:0>
Para ll el EEPROM
PMA<n:0> A<n:1>
D<7:0>
PMRD
PMWR
OE
WR
CE
PIC18F
Address Bus
Data Bus
Control Lines
PMCS
PMD<7:0>
Para ll el EEPROM
PMBE A0
PMRD/PMWR
D<7:0>
PIC18F
Address Bus
Data Bus
Control Lines
PMA0
R/W
RS
E
LCD Controller
PMCS
PM<7:0>
2010 Microchip Technology Inc. Preliminary DS39974A-page 203
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TABLE 11-2: REGISTERS ASSOCIATED WITH PMP MODULE
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF
PIR1 PMPIF(2) ADIF RC1IF TX1IF SSP1IF CCP1IF TMR2IF TMR1IF
PIE1 PMPIE(2) ADIE RC1IE TX1IE SSP1IE CCP1IE TMR2IE TMR1IE
IPR1 PMPIP(2) ADIP RC1IP TX1IP SSP1IP CCP1IP TMR2IP TMR1IP
PMCONH(2) PMPEN —— ADRMUX1 ADRMUX0 PTBEEN PTWREN PTRDEN
PMCONL(2) CSF1 CSF0 ALP — CS1P BEP WRSP RDSP
PMADDRH(1,2)/— CS1 Parallel Master Port Address High Byte
PMDOUT1H(1,2) Parallel Port Out Data High Byte (Buffer 1)
PMADDRL(1,2)/ Parallel Master Port Address Low Byte
PMDOUT1L(1,2) Parallel Port Out Data Low Byte (Buffer 0)
PMDOUT2H(2) Parallel Port Out Data High Byte (Buffer 3)
PMDOUT2L(2) Parallel Port Out Data Low Byte (Buffer 2)
PMDIN1H(2) Parallel Port In Data High Byte (Buffer 1)
PMDIN1L(2) Parallel Port In Data Low Byte (Buffer 0)
PMDIN2H(2) Parallel Port In Data High Byte (Buffer 3)
PMDIN2L(2) Parallel Port In Data Low Byte (Buffer 2)
PMMODEH(2) BUSY IRQM1 IRQM0 INCM1 INCM0 MODE16 MODE1 MODE0
PMMODEL(2) WAITB1 WAITB0 WAITM3 WAITM2 WAITM1 WAITM0 WAITE1 WAITE0
PMEH(2) PTEN15 PTEN14 PTEN13 PTEN12 PTEN11 PTEN10 PTEN9 PTEN8
PMEL(2) PTEN7 PTEN6 PTEN5 PTEN4 PTEN3 PTEN2 PTEN1 PTEN0
PMSTATH(2) IBF IBOV —— IB3F IB2F IB1F IB0F
PMSTATL(2) OBE OBUF —— OB3E OB2E OB1E OB0E
PADCFG1 — — — — — RTSECSEL1 RTSECSEL0 PMPTTL
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used during PMP operation.
Note 1: The PMADDRH/PMDOUT1H and PMADDRL/PMDOUT1L register pairs share the physical registers and
addresses, but have different functions determined by the module’s operating mode.
2: These bits and/or registers are only available in 44-pin devices.
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NOTES:
2010 Microchip Technology Inc. Preliminary DS39974A-page 205
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12.0 T IMER0 MODULE
The Timer0 module incorporates the following features:
• Software selectable operation as a timer or
counter in both 8-bit or 16-bit modes
• Readable and writable registers
• Dedicated 8-bit, software programmable
prescaler
• Selectable clock source (internal or external)
• Edge select for external clock
• Interrupt-on-overflow
The T0CON register (Register 12-1) controls all
aspects of the module’s operation, including the
prescale selection. It is both readable and writable.
Figure 12-1 provides a simplified block diagram of the
Timer0 module in 8-bit mode. Figure 12-2 provides a
simplified block diagram of the Timer0 module in 16-bit
mode.
REGISTER 12-1: T0CON: TIMER0 CONTROL REGISTER (ACCESS FD5h)
R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
TMR0ON T08BIT T0CS T0SE PSA T0PS2 T0PS1 T0PS0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 TMR0ON: Timer0 On/Off Control bit
1 = Enables Timer0
0 = Stops Timer0
bit 6 T08BIT: Timer0 8-Bit/16-Bit Control bit
1 = Timer0 is configured as an 8-bit timer/counter
0 = Timer0 is configured as a 16-bit timer/counter
bit 5 T0CS: Timer0 Clock Source Select bit
1 = Transition on T0CKI pin input edge
0 = Internal clock (FOSC/4)
bit 4 T0SE: Timer0 Source Edge Select bit
1 = Increment on high-to-low transition on T0CKI pin
0 = Increment on low-to-high transition on T0CKI pin
bit 3 PSA: Timer0 Prescaler Assignment bit
1 = Timer0 prescaler is not assigned. Timer0 clock input bypasses prescaler.
0 = Timer0 prescaler is assigned. Timer0 clock input comes from the prescaler output.
bit 2-0 T0PS<2:0>: Timer0 Prescaler Select bits
111 = 1:256 Prescale value
110 = 1:128 Prescale value
101 = 1:64 Prescale value
100 = 1:32 Prescale value
011 = 1:16 Prescale value
010 = 1:8 Prescale value
001 = 1:4 Prescale value
000 = 1:2 Prescale value
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12.1 Timer0 Operation
Timer0 can operate as either a timer or a counter. The
mode is selected with the T0CS bit (T0CON<5>). In
Timer mode (T0CS = 0), the module increments on
every clock by default unless a different prescaler value
is selected (see Section 12.3 “Prescaler”). If the
TMR0 register is written to, the increment is inhibited
for the following two instruction cycles. The user can
work around this by writing an adjusted value to the
TMR0 register.
The Counter mode is selected by setting the T0CS bit
(= 1). In this mode, Timer0 increments either on every
rising edge or falling edge of the pin, T0CKI. The
incrementing edge is determined by the Timer0 Source
Edge Select bit, T0SE (T0CON<4>); clearing this bit
selects the rising edge. Restrictions on the external
clock input are discussed below.
An external clock source can be used to drive Timer0;
however, it must meet certain requirements to ensure
that the external clock can be synchronized with the
internal phase clock (TOSC). There is a delay between
synchronization and the onset of incrementing the
timer/counter.
12.2 Timer0 Reads and Writes in
16-Bit Mode
TMR0H is not the actual high byte of Timer0 in 16-bit
mode. It is actually a buffered version of the real high
byte of Timer0, which is not directly readable nor
writable (refer to Figure 12-2). TMR0H is updated with
the contents of the high byte of Timer0 during a read of
TMR0L. This provides the ability to read all 16 bits of
Timer0 without having to verify that the read of the high
and low byte were valid, due to a rollover between
successive reads of the high and low byte.
Similarly, a write to the high byte of Timer0 must also
take place through the TMR0H Buffer register. The high
byte is updated with the contents of TMR0H when a
write occurs to TMR0L. This allows all 16 bits of Timer0
to be updated at once.
FIGU RE 12 -1: TI MER0 BL OCK DIAGRA M (8- BIT MOD E)
FIGU RE 12 -2: TI MER0 BL OCK DI AGRA M (16-B IT MODE )
Note: Upon Reset, Timer0 is enabled in 8-bit mode with clock input from T0CKI max. prescale.
T0CKI Pin
T0SE
0
1
1
0
T0CS
FOSC/4
Programmable
Prescaler
Sync with
Internal
Clocks
TMR0L
(2 TCY Delay)
Internal Data Bus
PSA
T0PS<2:0>
Set
TMR0IF
on Overflow
38
8
Note: Upon Reset, Timer0 is enabled in 8-bit mode with clock input from T0CKI max. prescale.
T0CKI Pin
T0SE
0
1
1
0
T0CS
FOSC/4
Sync with
Internal
Clocks
TMR0L
(2 TCY Delay)
Internal Data Bus
8
PSA
T0PS<2:0>
Set
TMR0IF
on Overflow
3
TMR0
TMR0H
High Byte
88
8
Read TMR0L
Write TMR0L
8
Programmable
Prescaler
2010 Microchip Technology Inc. Preliminary DS39974A-page 207
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12.3 Prescaler
An 8-bit counter is available as a prescaler for the Timer0
module. The prescaler is not directly readable or writable.
Its value is set by the PSA and T0PS<2:0> bits
(T0CON<3:0>), which determine the prescaler
assignment and prescale ratio.
Clearing the PSA bit assigns the prescaler to the
Timer0 module. When it is assigned, prescale values
from 1:2 through 1:256, in power-of-2 increments, are
selectable.
When assigned to the Timer0 module, all instructions
writing to the TMR0 register (e.g., CLRF TMR0, MOVWF
TMR0, BSF TMR0, etc.) clear the prescaler count.
12.3.1 SWITCHING PRESCALER
ASSIGNMENT
The prescaler assignment is fully under software
control and can be changed “on-the-fly” during program
execution.
12.4 Timer0 Interrupt
The TMR0 interrupt is generated when the TMR0
register overflows from FFh to 00h in 8-bit mode, or
from FFFFh to 0000h in 16-bit mode. This overflow sets
the TMR0IF flag bit. The interrupt can be masked by
clearing the TMR0IE bit (INTCON<5>). Before
re-enabling the interrupt, the TMR0IF bit must be
cleared in software by the Interrupt Service Routine
(ISR).
Since Timer0 is shut down in Sleep mode, the TMR0
interrupt cannot awaken the processor from Sleep.
TABLE 12-1: REGISTERS ASSOCIATED WITH TIMER0
Note: Writing to TMR0 when the prescaler is
assigned to Timer0 will clear the prescaler
count but will not change the prescaler
assignment.
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
TMR0L Timer0 Register Low Byte
TMR0H Timer0 Register High Byte
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF
T0CON TMR0ON T08BIT T0CS T0SE PSA T0PS2 T0PS1 T0PS0
Legend: Shaded cells are not used by Timer0.
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13.0 T IMER1 MODULE
The Timer1 timer/counter module incorporates these
features:
• Software selectable operation as a 16-bit timer or
counter
• Readable and writable 8-bit registers (TMR1H
and TMR1L)
• Selectable clock source (internal or external) with
device clock or Timer1 oscillator internal options
• Interrupt-on-overflow
• Reset on ECCP Special Event Trigger
• Device clock status flag (SOSCRUN)
• Timer with gated control
Figure 13-1 displays a simplified block diagram of the
Timer1 module.
The module incorporates its own low-power oscillator
to provide an additional clocking option. The Timer1
oscillator can also be used as a low-power clock source
for the microcontroller in power-managed operation.
Timer1 is controlled through the T1CON Control
register (Register 13-1). It also contains the Timer1
Oscillator Enable bit (T1OSCEN). Timer1 can be
enabled or disabled by setting or clearing control bit,
TMR1ON (T1CON<0>).
The FOSC clock source (TMR1CS<1:0> = 01) should not
be used with the ECCP capture/compare features. If the
timer will be used with the capture or compare features,
always select one of the other timer clocking options.
REGISTER 13-1: T1CON: TIMER1 CONTROL REGISTER (ACCESS FCDh)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
TMR1CS1 TMR1CS0 T1CKPS1 T1CKPS0
T1OSCEN
T1SYNC RD16 TMR1ON
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-6 TMR1CS<1:0>: Timer1 Clock Source Select bits
10 = Timer1 clock source is the T1OSC or T1CKI pin
01 = Timer1 clock source is the system clock (FOSC)(1)
00 = Timer1 clock source is the instruction clock (FOSC/4)
bit 5-4 T1CKPS<1:0>: Timer1 Input Clock Prescale Select bits
11 = 1:8 Prescale value
10 = 1:4 Prescale value
01 = 1:2 Prescale value
00 = 1:1 Prescale value
bit 3 T1OSCEN: Timer1 Oscillator Source Select bit
When TMR1CS<1:0> = 10:
1 = Power up the Timer1 crystal driver and supply the Timer1 clock from the crystal output
0 = Timer1 crystal driver is off, Timer1 clock is from the T1CKI input pin(2)
When TMR1CS<1:0> = 0x:
1 = Power up the Timer1 crystal driver
0 = Timer1 crystal driver is off(2)
bit 2 T1SYNC: Timer1 External Clock Input Synchronization Select bit
TMR1CS<1:0> = 10:
1 = Do not synchronize external clock input
0 = Synchronize external clock input
TMR1CS<1:0> = 0x:
This bit is ignored. Timer1 uses the internal clock when TMR1CS<1:0> = 0x.
bit 1 RD16: 16-Bit Read/Write Mode Enable bit
1 = Enables register read/write of Timer1 in one 16-bit operation
0 = Enables register read/write of Timer1 in two 8-bit operations
bit 0 TMR1ON: Timer1 On bit
1 = Enables Timer1
0 = Stops Timer1
Note 1: The FOSC clock source should not be selected if the timer will be used with the ECCP capture/compare features.
2: The Timer1 oscillator crystal driver is powered whenever T1OSCEN (T1CON<3>) or T3OSCEN
(T3CON<3>) = 1. The circuit is enabled by the logical OR of these two bits. When disabled, the inverter and
feedback resistor are disabled to eliminate power drain. The TMR1ON and TMR3ON bits do not have to be
enabled to power up the crystal driver.
PIC18F47J13 FAMILY
DS39974A-page 210 Preliminary 2010 Microchip Technology Inc.
13.1 Timer1 Gate Control Register
The Timer1 Gate Control register (T1GCON),
displayed in Register 13-2, is used to control the
Timer1 gate.
REGISTER 13-2: T1GCON: TIMER1 GATE CONTROL REGISTER (ACCESS F9Ah)(1)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R-x R/W-0 R/W-0
TMR1GE T1GPOL T1GTM T1GSPM T1GGO/T1DONE T1GVAL T1GSS1 T1GSS0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 TMR1GE: Timer1 Gate Enable bit
If TMR1ON = 0:
This bit is ignored.
If TMR1ON = 1:
1 = Timer1 counting is controlled by the Timer1 gate function
0 = Timer1 counts regardless of the Timer1 gate function
bit 6 T1GPOL: Timer1 Gate Polarity bit
1 = Timer1 gate is active-high (Timer1 counts when gate is high)
0 = Timer1 gate is active-low (Timer1 counts when gate is low)
bit 5 T1GTM: Timer1 Gate Toggle Mode bit
1 = Timer1 Gate Toggle mode is enabled
0 = Timer1 Gate Toggle mode is disabled and toggle flip-flop is cleared
Timer1 gate flip-flop toggles on every rising edge.
bit 4 T1GSPM: Timer1 Gate Single Pulse Mode bit
1 = Timer1 Gate Single Pulse mode is enabled and is controlling the Timer1 gate
0 = Timer1 Gate Single Pulse mode is disabled
bit 3 T1GGO/T1DONE: Timer1 Gate Single Pulse Acquisition Status bit
1 = Timer1 gate single pulse acquisition is ready, waiting for an edge
0 = Timer1 gate single pulse acquisition has completed or has not been started
This bit is automatically cleared when T1GSPM is cleared.
bit 2 T1GVAL: Timer1 Gate Current State bit
Indicates the current state of the Timer1 gate that could be provided to TMR1H:TMR1L; unaffected by
Timer1 Gate Enable (TMR1GE) bit.
bit 1-0 T1GSS<1:0>: Timer1 Gate Source Select bits
00 = Timer1 gate pin
01 = TMR2 to match PR2 output
10 = Comparator 1 output
11 = Comparator 2 output
Note 1: Programming the T1GCON prior to T1CON is recommended.
2010 Microchip Technology Inc. Preliminary DS39974A-page 211
PIC18F47J13 FAMILY
13.2 Timer1 Operation
The Timer1 module is an 8-bit or 16-bit incrementing
counter, which is accessed through the
TMR1H:TMR1L register pair.
When used with an internal clock source, the module is
a timer and increments on every instruction cycle.
When used with an external clock source, the module
can be used as either a timer or counter and
increments on every selected edge of the external
source.
Timer1 is enabled by configuring the TMR1ON and
TMR1GE bits in the T1CON and T1GCON registers,
respectively.
When Timer1 is enabled, the RC1/CCP8/T1OSI/RP12
and RC0/T1OSO/T1CKI/RP11 pins become inputs.
This means the values of TRISC<1:0> are ignored and
the pins are read as ‘0’.
13.3 Clock Source Selection
The TMR1CS<1:0> and T1OSCEN bits of the T1CON
register are used to select the clock source for Timer1.
Register 13-1 displays the clock source selections.
13.3.1 INTERNAL CLOCK SOURCE
When the internal clock source is selected, the
TMR1H:TMR1L register pair will increment on multiples
of FOSC as determined by the Timer1 prescaler.
13.3.2 EXTERNAL CLOCK SOURCE
When the external clock source is selected, the Timer1
module may work as a timer or a counter.
When enabled to count, Timer1 is incremented on the
rising edge of the external clock input, T1CKI, or the
capacitive sensing oscillator signal. Either of these
external clock sources can be synchronized to the
microcontroller system clock or they can run
asynchronously.
When used as a timer with a clock oscillator, an
external 32.768 kHz crystal can be used in conjunction
with the dedicated internal oscillator circuit.
TABLE 13-1: TIMER1 CLOCK SOURCE SELECTION
Note: In Counter mode, a falling edge must be
registered by the counter prior to the first
incrementing rising edge after any one or
more of the following conditions:
• Timer1 enabled after POR Reset
• Write to TMR1H or TMR1L
• Timer1 is disabled
• Timer1 is disabled (TMR1ON = 0)
when T1CKI is high, then Timer1 is
enabled (TMR1ON = 1) when T1CKI is
low.
TMR1CS1 TMR1CS0 T1OSCEN Clock Source
01xClock Source (FOSC)
00xInstruction Clock (FOSC/4)
100External Clock on T1CKI Pin
101Oscillator Circuit on T1OSI/T1OSO Pin
PIC18F47J13 FAMILY
DS39974A-page 212 Preliminary 2010 Microchip Technology Inc.
FIGU RE 13-1: TI MER 1 BLOCK DIAG RAM
TMR1H TMR1L
T1SYNC
T1CKPS<1:0>
Prescaler
1, 2, 4, 8
0
1
Synchronized
Clock Input
2
Set Flag bit
TMR1IF on
Overflow TMR1(2)
TMR1ON
Note 1: ST buffer is high-speed type when using T1CKI.
2: Timer1 register increments on the rising edge.
3: Synchronization does not operate while in Sleep.
T1G
T1OSC
FOSC/4
Internal
Clock
T1OSO/T1CKI
T1OSI
T1OSCEN
1
0
T1CKI
TMR1CS<1:0>
(1)
Synchronize(3)
det
Sleep Input
TMR1GE
0
1
00
01
10
From Timer2
Comparator 1
T1GPOL
D
Q
CK
Q
0
1
T1GVAL
T1GTM
Single Pulse
Acq. Control
T1GSPM
T1GGO/T1DONE
T1GSS<1:0>
EN
OUT
10
00
01
FOSC
Internal
Clock
Output
Match PR2
R
D
EN
Q
Q1
RD
T1GCON
Data Bus
det
Interrupt
TMR1GIF
Set
T1CLK
FOSC/2
Internal
Clock
D
EN
Q
T1G_IN
TMR1ON
SOSCGO
T1OSCEN
T3OSCEN
T5OSCEN
Output
11
Comparator 2
OutputOutput
2010 Microchip Technology Inc. Preliminary DS39974A-page 213
PIC18F47J13 FAMILY
13.4 Timer1 16-Bit Read/Write Mode
Timer1 can be configured for 16-bit reads and writes.
When the RD16 control bit (T1CON<1>) is set, the
address for TMR1H is mapped to a buffer register for
the high byte of Timer1. A read from TMR1L loads the
contents of the high byte of Timer1 into the Timer1 High
Byte Buffer register. This provides the user with the
ability to accurately read all 16 bits of Timer1 without
having to determine whether a read of the high byte,
followed by a read of the low byte, has become invalid
due to a rollover between reads.
A write to the high byte of Timer1 must also take place
through the TMR1H Buffer register. The Timer1 high
byte is updated with the contents of TMR1H when a
write occurs to TMR1L. This allows a user to write all
16 bits to both the high and low bytes of Timer1 at once.
The high byte of Timer1 is not directly readable or
writable in this mode. All reads and writes must take
place through the Timer1 High Byte Buffer register.
Writes to TMR1H do not clear the Timer1 prescaler.
The prescaler is only cleared on writes to TMR1L.
13.5 Timer1 Oscillator
An on-chip crystal oscillator circuit is incorporated
between pins, T1OSI (input) and T1OSO (amplifier
output). It is enabled by setting the Timer1 Oscillator
Enable bit, T1OSCEN (T1CON<3>). The oscillator is a
low-power circuit rated for 32 kHz crystals. It will
continue to run during all power-managed modes. The
circuit for a typical LP oscillator is depicted in
Figure 13-2. Table 13-2 provides the capacitor selection
for the Timer1 oscillator.
The user must provide a software time delay to ensure
proper start-up of the Timer1 oscillator.
FIGURE 13-2: EXTERNAL COMPONENTS
FOR THE TIMER1 LP
OSCILLATOR
T ABLE 13-2: CAPACITOR SELECTION FOR
THE TIMER
OSCILLATOR(2,3,4,5)
The Timer1 crystal oscillator drive level is determined
based on the SOSCSEL (CONFIG2L<3:4>) Configura-
tion bit. The Higher Drive Level mode,
SOSCSEL = 0b11, is intended to drive a wide variety
of 32.768 kHz crystals with a variety of load capaci-
tance (CL) ratings.
The Lower Drive Level mode is highly optimized for
extremely low-power consumption. It is not intended to
drive all types of 32.768 kHz crystals. In the Low Drive
Level mode, the crystal oscillator circuit may not work
correctly if excessively large discrete capacitors are
placed on the T1OSI and T1OSO pins. This mode is
only designed to work with discrete capacitances of
approximately 3 pF-10 pF on each pin.
Crystal manufacturers usually specify a CL (load
capacitance) rating for their crystals. This value is
related to, but not necessarily the same as, the values
that should be used for C1 and C2 in Figure 13-2. See
the crystal manufacturer’s applications information for
more details on how to select the optimum C1 and C2
for a given crystal. The optimum value depends in part
on the amount of parasitic capacitance in the circuit,
which is often unknown. Therefore, after values have
been selected, it is highly recommended that thorough
testing and validation of the oscillator be performed.
Note: See the Notes with Table 13-2 for additional
information about capacitor selection.
C1
C2
XTAL
T1OSI
T1OSO
32.768 kHz
12 pF
12 pF
PIC18F47J13
Oscillator
Type Freq. C1 C2
LP 32 kHz 12 pF(1) 12 pF(1)
Note 1: Microchip suggests these values as a
starting point in validating the oscillator
circuit.
2: Higher capacitance increases the stability
of the oscillator but also increases the
start-up time.
3: Since each resonator/crystal has its own
characteristics, the user should consult
the resonator/crystal manufacturer for
appropriate values of external
components.
4: Capacitor values are for design guid-
ance only. Values listed would be typical
of a CL = 10 pF rated crystal when
SOSCSEL = 0b11.
5: Incorrect capacitance value may result in
a frequency not meeting the crystal
manufacturer’s tolerance specification.
PIC18F47J13 FAMILY
DS39974A-page 214 Preliminary 2010 Microchip Technology Inc.
13.5.1 USING TIMER1 AS A
CLOCK SOURCE
The Timer1 oscillator is also available as a clock source
in power-managed modes. By setting the clock select
bits, SCS<1:0> (OSCCON<1:0>), to ‘01’, the device
switches to SEC_RUN mode. Both the CPU and
peripherals are clocked from the Timer1 oscillator. If the
IDLEN bit (OSCCON<7>) is cleared and a SLEEP
instruction is executed, the device enters SEC_IDLE
mode. Additional details are available in Section 4.0
“Low-Power Modes”.
Whenever the Timer1 oscillator is providing the clock
source, the Timer1 system clock status flag,
SOSCRUN (OSCCON2<6>), is set. This can be used
to determine the controller’s current clocking mode. It
can also indicate the clock source currently being used
by the Fail-Safe Clock Monitor. If the Clock Monitor is
enabled and the Timer1 oscillator fails while providing
the clock, polling the SOSCRUN bit will indicate
whether the clock is being provided by the Timer1
oscillator or another source.
13.5.2 TIMER1 OSCILLATOR LAYOUT
CONSIDERATIONS
The Timer1 oscillator circuit draws very little power
during operation. Due to the low-power nature of the
oscillator, it may also be sensitive to rapidly changing
signals in close proximity. This is especially true when
the oscillator is configured for extremely Low-Power
mode (SOSCSEL = 0b01).
The oscillator circuit, displayed in Figure 13-2, should
be located as close as possible to the microcontroller.
There should be no circuits passing within the oscillator
circuit boundaries other than VSS or VDD.
If a high-speed circuit must be located near the
oscillator (such as the ECCP1 pin in Output Compare
or PWM mode, or the primary oscillator using the
OSC2 pin), a grounded guard ring around the oscillator
circuit, as displayed in Figure 13-3, may be helpful
when used on a single-sided PCB or in addition to a
ground plane.
FIGURE 13-3: OSCILLATOR CIRCUIT
WITH GROUNDED
GUAR D RING
In the Low Drive Level mode, SOSCSEL = 0b01, it is
critical that the RC2 I/O pin signals be kept away from
the oscillator circuit. Configuring RC2 as a digital out-
put, and toggling it, can potentially disturb the oscillator
circuit, even with relatively good PCB layout. If
possible, it is recommended to either leave RC2
unused, or use it as an input pin with a slew rate limited
signal source. If RC2 must be used as a digital output,
it may be necessary to use the Higher Drive Level
Oscillator mode (SOSCSEL = 0b11) with many PCB
layouts. Even in the High Drive Level mode, careful lay-
out procedures should still be followed when designing
the oscillator circuit.
In addition to dV/dt induced noise considerations, it is
also important to ensure that the circuit board is clean.
Even a very small amount of conductive soldering flux
residue can cause PCB leakage currents which can
overwhelm the oscillator circuit.
13.6 Timer1 Interrupt
The TMR1 register pair (TMR1H:TMR1L) increments
from 0000h to FFFFh and rolls over to 0000h. The
Timer1 interrupt, if enabled, is generated on overflow
which is latched in interrupt flag bit, TMR1IF
(PIR1<0>). This interrupt can be enabled or disabled
by setting or clearing the Timer1 Interrupt Enable bit,
TMR1IE (PIE1<0>).
VDD
OSC1
VSS
OSC2
RC0
RC1
RC2
Note: Not drawn to scale.
2010 Microchip Technology Inc. Preliminary DS39974A-page 215
PIC18F47J13 FAMILY
13.7 Resetting T imer1 Using the ECCP
S pecial Event Trigger
If ECCP1 or ECCP2 is configured to use Timer1 and to
generate a Special Event Trigger in Compare mode
(CCPxM<3:0> = 1011), this signal will reset Timer3.
The trigger from ECCP2 will also start an A/D conver-
sion if the A/D module is enabled (see Section 19.3.4
“Special Event Trigger” for more information).
The module must be configured as either a timer or a
synchronous counter to take advantage of this feature.
When used this way, the CCPRxH:CCPRxL register
pair effectively becomes a period register for Timer1.
If Timer1 is running in Asynchronous Counter mode,
this Reset operation may not work.
In the event that a write to Timer1 coincides with a
Special Event Trigger, the write operation will take
precedence.
13.8 Timer1 Gate
The Timer1 can be configured to count freely or the count
can be enabled and disabled using the Timer1 gate
circuitry. This is also referred to as Timer1 gate count
enable.
The Timer1 gate can also be driven by multiple
selectable sources.
13.8.1 TIMER1 GATE COUNT ENABLE
The Timer1 Gate Enable mode is enabled by setting
the TMR1GE bit of the T1GCON register. The polarity
of the Timer1 Gate Enable mode is configured using
the T1GPOL bit of the T1GCON register.
When Timer1 Gate Enable mode is enabled, Timer1
will increment on the rising edge of the Timer1 clock
source. When Timer1 Gate Enable mode is disabled,
no incrementing will occur and Timer1 will hold the
current count. See Figure 13-4 for timing details.
TABLE 13-3: TIMER1 GATE ENABLE
SELECTIONS
FIGU RE 13-4: T I MER 1 G ATE COUN T EN AB L E M O DE
Note: The Special Event Trigger from the
ECCPx module will not set the TMR1IF
interrupt flag bit (PIR1<0>).
T1CLK T1GPO L T1G Timer1 Operation
00Counts
01Holds Count
10Holds Count
11Counts
TMR1GE
T1GPOL
T1G_IN
T1CKI
T1GVAL
Timer1 NN + 1 N + 2 N + 3 N + 4
PIC18F47J13 FAMILY
DS39974A-page 216 Preliminary 2010 Microchip Technology Inc.
13.8.2 TIMER1 GATE SOURCE
SELECTION
The Timer1 gate source can be selected from one of
four different sources. Source selection is controlled by
the T1GSSx bits of the T1GCON register. The polarity
for each available source is also selectable. Polarity
selection is controlled by the T1GPOL bit of the
T1GCON register.
TABLE 13-4: TIMER1 GATE SOURCES
13.8.2.1 T1G Pin Gate Operation
The T1G pin is one source for Timer1 gate control. It
can be used to supply an external source to the Timer1
gate circuitry.
13.8.2.2 Timer2 Match Gate Operation
The TMR2 register will increment until it matches the
value in the PR2 register. On the very next increment
cycle, TMR2 will be reset to 00h. When this Reset
occurs, a low-to-high pulse will automatically be
generated and internally supplied to the Timer1 gate
circuitry. The pulse remains high for one instruction
cycle and returns to low until the next match.
When T1GPOL = 1, Timer1 increments for a single
instruction cycle following TMR2 matching PR2. With
T1GPOL = 0, Timer1 increments except during the
cycle following the match.
13.8.3 TIMER1 GATE TOGGLE MODE
When Timer1 Gate Toggle mode is enabled, it is
possible to measure the full cycle length of a Timer1
gate signal, as opposed to the duration of a single level
pulse.
The Timer1 gate source is routed through a flip-flop that
changes state on every incrementing edge of the
signal. See Figure 13-5 for timing details.
The T1GVAL bit will indicate when the Toggled mode is
active and the timer is counting.
The Timer1 Gate Toggle mode is enabled by setting the
T1GTM bit of the T1GCON register. When the T1GTM
bit is cleared, the flip-flop is cleared and held clear. This
is necessary in order to control which edge is
measured.
FIGURE 13-5: TIMER1 GATE TOGGLE MODE
T1GSS<1:0> Timer1 Gate Source
00 Timer1 Gate Pin
01 TMR2 matches PR2
10 Comparator 1 output
11 Comparator 2 output
TMR1GE
T1GPOL
T1GTM
T1G_IN
T1CKI
T1GVAL
Timer1 N N + 1 N + 2 N + 3 N + 4 N + 5 N + 6 N + 7 N + 8
2010 Microchip Technology Inc. Preliminary DS39974A-page 217
PIC18F47J13 FAMILY
13.8.4 TIMER1 GATE SINGLE PULSE
MODE
When Timer1 Gate Single Pulse mode is enabled, it is
possible to capture a single pulse gate event. Timer1
Gate Single Pulse mode is first enabled by setting the
T1GSPM bit in the T1GCON register. Next, the
T1GGO/T1DONE bit in the T1GCON register must be
set. The Timer1 will be fully enabled on the next incre-
menting edge. On the next trailing edge of the pulse,
the T1GGO/T1DONE bit will automatically be cleared.
No other gate events will be allowed to increment
Timer1 until the T1GGO/T1DONE bit is once again set
in software.
Clearing the T1GSPM bit of the T1GCON register will
also clear the T1GGO/T1DONE bit. See Figure 13-6
for timing details.
Enabling the Toggle mode and the Single Pulse mode,
simultaneously, will permit both sections to work together.
This allows the cycle times on the Timer1 gate source to
be measured. See Figure 13-7 for timing details.
13.8.5 TIMER1 GATE VALUE STATUS
When the Timer1 gate value status is utilized, it is
possible to read the most current level of the gate
control value. The value is stored in the T1GVAL bit in
the T1GCON register. The T1GVAL bit is valid even
when the Timer1 gate is not enabled (TMR1GE bit is
cleared).
FIGURE 13-6: TIMER1 GATE SINGLE PULS E MODE
TMR1GE
T1GPOL
T1G_IN
T1CKI
T1GVAL
Timer1 N N + 1 N + 2
T1GSPM
T1GGO/
T1DONE
Set by Software
Cleared by Hardware on
Falling Edge of T1GVAL
Set by Hardware on
Falling Edge of T1GVAL
Cleared by Software
Cleared by
Software
TMR1GIF
Counting Enabled on
Rising Edge of T1G
PIC18F47J13 FAMILY
DS39974A-page 218 Preliminary 2010 Microchip Technology Inc.
FIGURE 13-7: TIMER1 GATE SINGLE PULSE AND TOGGLE COMBINED MODE
TABLE 13-5: REGISTERS ASSOCIATED WITH TIMER1 AS A TIMER/COUNTER
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF
PIR1 PMPIF(1) ADIF RC1IF TX1IF SSP1IF CCP1IF TMR2IF TMR1IF
PIE1 PMPIE(1) ADIE RC1IE TX1IE SSP1IE CCP1IE TMR2IE TMR1IE
IPR1 PMPIP(1) ADIP RC1IP TX1IP SSP1IP CCP1IP TMR2IP TMR1IP
TMR1L Timer1 Register Low Byte
TMR1H Timer1 Register High Byte
T1CON TMR1CS1 TMR1CS0 T1CKPS1 T1CKPS0 T1OSCEN T1SYNC RD16 TMR1ON
T1GCON TMR1GE T1GPOL T1GTM T1GSPM T1GGO/
T1DONE
T1GVAL T1GSS1 T1GSS0
OSCCON2 — SOSCRUN — SOSCDRV SOSCGO — — —
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used by the Timer1 module.
Note 1: These bits are only available in 44-pin devices.
TMR1GE
T1GPOL
T1G_IN
T1CKI
T1GVAL
Timer1 NN + 1 N + 2
T1GSPM
T1GGO/
T1DONE
Set by Software
Cleared by Hardware on
Falling Edge of T1GVAL
Set by Hardware on
Falling Edge of T1GVAL
Cleared by Software
Cleared by
Software
TMR1GIF
T1GTM
Counting Enabled on
Rising Edge of T1G
N + 4
N + 3
2010 Microchip Technology Inc. Preliminary DS39974A-page 219
PIC18F47J13 FAMILY
14.0 T IMER2 MODULE
The Timer2 module incorporates the following features:
• 8-bit Timer and Period registers (TMR2 and PR2,
respectively)
• Readable and writable (both registers)
• Software programmable prescaler
(1:1, 1:4 and 1:16)
• Software programmable postscaler
(1:1 through 1:16)
• Interrupt on TMR2 to PR2 match
• Optional use as the shift clock for the
MSSP modules
The module is controlled through the T2CON register
(Register 14-1) which enables or disables the timer and
configures the prescaler and postscaler. Timer2 can be
shut off by clearing control bit, TMR2ON (T2CON<2>),
to minimize power consumption.
A simplified block diagram of the module is shown in
Figure 14-1.
14.1 Timer2 Operation
In normal operation, TMR2 is incremented from 00h on
each clock (FOSC/4). A 4-bit counter/prescaler on the
clock input gives direct input, divide-by-4 and
divide-by-16 prescale options. These are selected by
the prescaler control bits, T2CKPS<1:0>
(T2CON<1:0>). The value of TMR2 is compared to that
of the Period register, PR2, on each clock cycle. When
the two values match, the comparator generates a
match signal as the timer output. This signal also resets
the value of TMR2 to 00h on the next cycle and drives
the output counter/postscaler (see Section 14.2
“T imer2 Interrupt”).
The TMR2 and PR2 registers are both directly readable
and writable. The TMR2 register is cleared on any
device Reset, while the PR2 register initializes at FFh.
Both the prescaler and postscaler counters are cleared
on the following events:
• a write to the TMR2 register
• a write to the T2CON register
• any device Reset (Power-on Reset (POR), MCLR
Reset, Watchdog Timer Reset (WDTR) or
Brown-out Reset (BOR))
TMR2 is not cleared when T2CON is written.
REGISTER 14-1: T2CON: TIMER2 CONTROL REGISTER (ACCESS FCAh)
U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— T2OUTPS3 T2OUTPS2 T2OUTPS1 T2OUTPS0 TMR2ON T2CKPS1 T2CKPS0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 Unimplemented: Read as ‘0’
bit 6-3 T2OUTPS<3:0>: Timer2 Output Postscale Select bits
0000 = 1:1 Postscale
0001 = 1:2 Postscale
•
•
•
1111 = 1:16 Postscale
bit 2 TMR2ON: Timer2 On bit
1 = Timer2 is on
0 = Timer2 is off
bit 1-0 T2CKPS<1:0>: Timer2 Clock Prescale Select bits
00 = Prescaler is 1
01 = Prescaler is 4
10 = Prescaler is 16
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DS39974A-page 220 Preliminary 2010 Microchip Technology Inc.
14.2 Timer2 Interrupt
Timer2 can also generate an optional device interrupt.
The Timer2 output signal (TMR2 to PR2 match) pro-
vides the input for the 4-bit output counter/postscaler.
This counter generates the TMR2 Match Interrupt Flag,
which is latched in TMR2IF (PIR1<1>). The interrupt is
enabled by setting the TMR2 Match Interrupt Enable
bit, TMR2IE (PIE1<1>).
A range of 16 postscaler options (from 1:1 through 1:16
inclusive) can be selected with the postscaler control
bits, T2OUTPS<3:0> (T2CON<6:3>).
14.3 Timer2 Output
The unscaled output of TMR2 is available primarily to
the ECCP modules, where it is used as a time base for
operations in PWM mode.
Timer2 can be optionally used as the shift clock source
for the MSSP modules operating in SPI mode.
Additional information is provided in Section 20.0
“Master Synchronous Serial Port (MSSP) Module”.
FIGU RE 14 -1: TI MER2 BL OCK DIAGRA M
TABLE 14-1: REGISTERS ASSOCIATED WITH TIMER2 AS A TIMER/COUNTER
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF
PIR1 PMPIF(1) ADIF RC1IF TX1IF SSP1IF CCP1IF TMR2IF TMR1IF
PIE1 PMPIE(1) ADIE RC1IE TX1IE SSP1IE CCP1IE TMR2IE TMR1IE
IPR1 PMPIP(1) ADIP RC1IP TX1IP SSP1IP CCP1IP TMR2IP TMR1IP
TMR2 Timer2 Register
T2CON — T2OUTPS3 T2OUTPS2 T2OUTPS1 T2OUTPS0 TMR2ON T2CKPS1 T2CKPS0
PR2 Timer2 Period Register
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used by the Timer2 module.
Note 1: These bits are only available in 44-pin devices.
Comparator
TMR2 Output
TMR2
Postscaler
Prescaler PR2
2
FOSC/4
1:1 to 1:16
1:1, 1:4, 1:16
4
T2OUTPS<3:0>
T2CKPS<1:0>
Set TMR2IF
Internal Data Bus
8
Reset
TMR2/PR2
8
8
(to PWM or MSSPx)
Match
2010 Microchip Technology Inc. Preliminary DS39974A-page 221
PIC18F47J13 FAMILY
15.0 TIMER3/5 MODULE
The Timer3/5 timer/counter modules incorporate these
features:
• Software selectable operation as a 16-bit timer or
counter
• Readable and writable 8-bit registers (TMRxH
and TMRxL)
• Selectable clock source (internal or external) with
device clock or Timer1 oscillator internal options
• Interrupt-on-overflow
• Module Reset on ECCP Special Event Trigger
A simplified block diagram of the Timer3/5 module is
shown in Figure 15-1.
The Timer3/5 module is controlled through the TxCON
register (Register 15-1). It also selects the clock source
options for the ECCP modules. (For more information,
see Section 19.1.1 “ECCP Module and Timer
Resources”.)
The FOSC clock source should not be used with the
ECCP capture/compare features. If the timer will be
used with the capture or compare features, always
select one of the other timer clocking options.
Note: Throughout this section, generic references
are used for register and bit names that are the
same – except for an ‘x’ variable that indicates
the item’s association with the Timer3 or
Timer5 module. For example, the control
register is named TxCON, and refers to
T3CON and T5CON.
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DS39974A-page 222 Preliminary 2010 Microchip Technology Inc.
REGISTER 15-1: TxCON: TIMER3/5 CONTROL REGISTER (ACCESS F79h, BANKED F22h)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
TMRxCS1 TMRxCS0 TxCKPS1 TxCKPS0 TxOSCEN TxSYNC RD16 TMRxON
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-6 TMRxCS<1:0>: Clock Source Select bits
10 = Clock source is the pin or TxCKI input pin
01 = Clock source is the system clock (FOSC)(1)
00 = Clock source is the instruction clock (FOSC/4)
bit 5-4 TxCKPS<1:0>: Timerx Input Clock Prescale Select bits
11 = 1:8 Prescale value
10 = 1:4 Prescale value
01 = 1:2 Prescale value
00 = 1:1 Prescale value
bit 3 TxOSCEN: Timer Oscillator Enable bit
1 = T1OSC/SOSC oscillator used as clock source
0 = TxCKI digital input pin used as clock source
bit 2 TxSYNC: External Clock Input Synchronization Control bit
(Not usable if the device clock comes from Timer1/Timer3.)
When TMRxCS1:TMRxCS0 = 10:
1 = Do not synchronize external clock input
0 = Synchronize external clock input
When TMRxCS1:TMRxCS0 = 0x:
This bit is ignored; Timer3 uses the internal clock.
bit 1 RD16: 16-Bit Read/Write Mode Enable bit
1 = Enables register read/write of timer in one 16-bit operation
0 = Enables register read/write of timer in two eight-bit operations
bit 0 TMRxON: Timer On bit
1 = Enables Timer
0 = Stops Timer
Note 1: The FOSC clock source should not be selected if the timer will be used with the ECCP capture/compare
features.
2010 Microchip Technology Inc. Preliminary DS39974A-page 223
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15.1 Timer3/5 Gate Control Regi ster
The Timer3/5 Gate Control register (TxGCON),
provided in Register 14-2, is used to control the Timerx
gate.
REGISTER 15-2: TxGCON: TIMER3/5 GATE CONTROL REGISTER(1) (ACCESS F97h,
BANKED F21h)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R-x R/W-0 R/W-0
TMRxGE TxGPOL TxGTM TxGSPM TxGGO/TxDONE TxGVAL TxGSS1 TxGSS0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 TMRxGE: Timer Gate Enable bit
If TMRxON = 0:
This bit is ignored.
If TMRxON = 1:
1 = Timer counting is controlled by the Timerx gate function
0 = Timer counts regardless of the Timerx gate function
bit 6 TxGPOL: Gate Polarity bit
1 = Timer gate is active-high (Timerx counts when the gate is high)
0 = Timer gate is active-low (Timerx counts when the gate is low)
bit 5 TxGTM: Gate Toggle Mode bit
1 = Timer Gate Toggle mode is enabled.
0 = Timer Gate Toggle mode is disabled and toggle flip-flop is cleared
Timerx gate flip-flop toggles on every rising edge.
bit 4 TxGSPM: Timer Gate Single Pulse Mode bit
1 = Timer Gate Single Pulse mode is enabled and is controlling Timerx gate
0 = Timer Gate Single Pulse mode is disabled
bit 3 TxGGO/TxDONE: Timer Gate Single Pulse Acquisition Status bit
1 = Timer gate single pulse acquisition is ready, waiting for an edge
0 = Timer gate single pulse acquisition has completed or has not been started
This bit is automatically cleared when TxGSPM is cleared.
bit 2 TxGVAL: Timer Gate Current State bit
Indicates the current state of the Timer gate that could be provided to TMRxH:TMRxL. Unaffected by the
Timer Gate Enable bit (TMRxGE).
bit 1-0 TxGSS<1:0>: Timer Gate Source Select bits
11 = Comparator 2 output
10 = Comparator 1 output
01 = TMR4/6 to match PR4/6 output
00 = T3G/T5G gate input pin
Note 1: Programming the TxGCON prior to TxCON is recommended.
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DS39974A-page 224 Preliminary 2010 Microchip Technology Inc.
REGISTER 15-3: OSCCON2: OSCILLATOR CONTROL REGISTER 2 (ACCESS F87h)
U-0 R-0(2) U-0 R/W-1 R/W-0(2) R/W-1 U-0 U-0
— SOSCRUN — SOSCDRV SOSCGO(3) PRISD — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 Unimplemented: Read as ‘0’
bit 6 SOSCRUN: SOSC Run Status bit
1 = System clock comes from secondary SOSC
0 = System clock comes from an oscillator other than SOSC
bit 5 Unimplemented: Read as ‘0’
bit 4 SOSCDRV: SOSC Drive Control bit
1 = T1OSC/SOSC oscillator drive circuit is selected by Configuration bits, CONFIG2L<4:3>
0 = Low-power T1OSC/SOSC circuit is selected
bit 3 SOSCGO: Oscillator Start Control bit
1 = Turns on the oscillator, even if no peripherals are requesting it
0 = Oscillator is shut off unless peripherals are requesting it
bit 2 PRISD: Primary Oscillator Drive Circuit Shutdown bit
1 = Oscillator drive circuit is on
0 = Oscillator drive circuit is off (zero power)
bit 1-0 Unimplemented: Read as ‘0’
Note 1: Reset value is ‘0’ when Two-Speed Start-up is enabled and ‘1’ if disabled.
2: Default output frequency of INTOSC on Reset (4 MHz).
3: When the SOSC is selected to run from a digital clock input, rather than an external crystal, this bit has no
effect.
2010 Microchip Technology Inc. Preliminary DS39974A-page 225
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15.2 Timer3/5 Operation
Timer3 and Timer5 can operate in these modes:
•Timer
• Synchronous Counter
• Asynchronous Counter
• Timer with Gated Control
The operating mode is determined by the clock select
bits, TMRxCSx (TxCON<7:6>). When the TMRxCSx bits
are cleared (= 00), Timer3/5 increments on every internal
instruction cycle (FOSC/4). When TMRxCSx = 01, the
Timer3/5 clock source is the system clock (FOSC), and
when it is ‘10’, Timer3/5 works as a counter from the
external clock from the TxCKI pin (on the rising edge after
the first falling edge) or the Timer1 oscillator.
FIGURE 15 - 1: TI MER 3/ 5 BLOCK D IA GRA M
TMRxH TMRxL
TxSYNC
TxCKPS<1:0>
Prescaler
1, 2, 4, 8
0
1
Synchronized
Clock Input
2
Set Flag bit
TMRxIF on
Overflow TMRx(2)
TMRxON
Note 1: ST buffer is a high-speed type when using T1CKI.
2: Timerx registers increment on rising edge.
3: Synchronization does not operate while in Sleep.
TxG
T1OSC/SOSC
FOSC/4
Internal
Clock
T1OSO/T1CKI
T1OSI
TXOSCEN
1
0
TxCKI
TMRxCS<1:0>
(1)
Synchronize(3)
det
Sleep Input
TMRxGE
0
1
00
01
10
11
From Timer4/6
Comparator 1
TxGPOL
D
Q
CK
Q
0
1
TxGVAL
TxGTM
Single Pulse
Acq. Control
TxGSPM
TxGGO/TxDONE
TxGSS<1:0>
EN
OUT
10
00
01
FOSC
Internal
Clock
Comparator 2
Output
Match PR4/6
R
D
EN
Q
Q1
RD
T3GCON
Data Bus
det
Interrupt
TMRxGIF
Set
TxCLK
FOSC/2
Internal
Clock
D
EN
Q
TxG_IN
TMRxON
Output
SOSCGO
T1OSCEN
T3OSCEN
T5OSCEN
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DS39974A-page 226 Preliminary 2010 Microchip Technology Inc.
15.3 Timer3/5 16-Bit Read/Write Mode
Timer3/5 can be configured for 16-bit reads and writes
(see Figure 15.3). When the RD16 control bit
(TxCON<1>) is set, the address for TMRxH is mapped to
a buffer register for the high byte of Timer3/5. A read from
TMRxL will load the contents of the high byte of Timer3/5
into the Timerx High Byte Buffer register. This provides
users with the ability to accurately read all 16 bits of
Timer3/5 without having to determine whether a read of
the high byte, followed by a read of the low byte, has
become invalid due to a rollover between reads.
A write to the high byte of Timer3/5 must also take place
through the TMRxH Buffer register. The Timer3/5 high
byte is updated with the contents of TMRxH when a write
occurs to TMRxL. This allows users to write all 16 bits to
both the high and low bytes of Timer3/5 at once.
The high byte of Timer3/5 is not directly readable or
writable in this mode. All reads and writes must take
place through the Timerx High Byte Buffer register.
Writes to TMRxH do not clear the Timer3/5 prescaler.
The prescaler is only cleared on writes to TMRxL.
15.4 Using the Timer1 Oscilla tor as the
Timer3/5 Clock Source
The Timer1 internal oscillator may be used as the clock
source for Timer3/5. The Timer1 oscillator is enabled
by setting the T1OSCEN (T1CON<3>) bit. To use it as
the Timer3/5 clock source, the TMRxCS bits must also
be set. As previously noted, this also configures
Timer3/5 to increment on every rising edge of the
oscillator source.
The Timer1 oscillator is described in Section 13.0
“Timer1 Module”.
15.5 Timer3/5 Gates
Timer3/5 can be configured to count freely or the count
can be enabled and disabled using the Timer3/5 gate
circuitry. This is also referred to as the Timer3/5 gate
count enable.
The Timer3/5 gate can also be driven by multiple
selectable sources.
15.5.1 TIMER3/5 GATE COUNT ENABLE
The Timerx Gate Enable mode is enabled by setting
the TMRxGE bit (TxGCON<7>). The polarity of the
Timerx Gate Enable mode is configured using the
TxGPOL bit (TxGCON<6>).
When Timerx Gate Enable mode is enabled, Timer3/5
will increment on the rising edge of the Timer3/5 clock
source. When Timerx Gate Enable mode is disabled,
no incrementing will occur and Timer3/5 will hold the
current count. See Figure 15-2 for timing details.
TABLE 15-1: TIMER3/5 GATE ENABLE
SELECTIONS
FIGURE 15-2: TIMER3/5 GATE COUNT ENABLE MODE
TxCLK(†) TxGPOL
(TxGCON<6>) TxG
Pin Timerx
Operation
00Counts
01Holds Count
10Holds Count
11Counts
† The clock on which TMR3/5 is running. For more
information, see TxCLK in Figure 15-1.
TMRxGE
TxGPOL
TxG_IN
TxCKI
TxGVAL
Timer3/5 NN + 1 N + 2 N + 3 N + 4
2010 Microchip Technology Inc. Preliminary DS39974A-page 227
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15.5.2 TIMER3/5 GATE SOURCE
SELECTION
The Timer3/5 gate source can be selected from one of
four different sources. Source selection is controlled by
the TxGSS<1:0> bits (TxGCON<1:0>). The polarity for
each available source is also selectable and is
controlled by the TxGPOL bit (TxGCON<6>).
TABLE 15-2: TIMER3/5 GATE SOURCES
15.5.2.1 TxG Pin Gate Operation
The TxG pin is one source for Timer3/5 gate control. It
can be used to supply an external source to the gate
circuitry.
15.5.2.2 Timer4/6 Match Gate Operation
The TMR4/6 register will increment until it matches the
value in the PR4/6 register. On the very next increment
cycle, TMR4/6 will be reset to 00h. When this Reset
occurs, a low-to-high pulse will automatically be
generated and internally supplied to the Timer3/5 gate
circuitry.
15.5.3 TIMER3/5 GATE-TOGGLE MODE
When Timer3/5 Gate Toggle mode is enabled, it is
possible to measure the full cycle length of a Timer3/5
gate signal, as opposed to the duration of a single level
pulse.
The Timer1 gate source is routed through a flip-flop that
changes state on every incrementing edge of the
signal. (For timing details, see Figure 15-3.)
The TxGVAL bit will indicate when the Toggled mode is
active and the timer is counting.
Timer3/5 Gate Toggle mode is enabled by setting the
TxGTM bit (TxGCON<5>). When the TxGTM bit is
cleared, the flip-flop is cleared and held clear. This is
necessary in order to control which edge is measured.
FIGURE 15-3: TIMER3/5 GATE TOGGLE MODE
TxGSS<1:0> Timerx Gate Source
00 TxG timer gate pin
01 TMR4/6 matches PR4/6
10 Comparator 1 output
11 Comparator 2 output
TMRxGE
TxGPOL
TxGTM
TxG_IN
TxCKI
TxGVAL
Timer3/5 N N + 1 N + 2 N + 3 N + 4 N + 5 N + 6 N + 7 N + 8
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DS39974A-page 228 Preliminary 2010 Microchip Technology Inc.
15.5.4 TIMER3/5 GATE SINGLE PULSE
MODE
When Timer3/5 Gate Single Pulse mode is enabled, it
is possible to capture a single pulse gate event.
Timer3/5 Gate Single Pulse mode is first enabled by
setting the TxGSPM bit (TxGCON<4>). Next, the
TxGGO/TxDONE bit (TxGCON<3>) must be set.
The Timer3/5 will be fully enabled on the next incre-
menting edge. On the next trailing edge of the pulse,
the TxGGO/TxDONE bit will automatically be cleared.
No other gate events will be allowed to increment
Timer3/5 until the TxGGO/TxDONE bit is once again
set in software.
Clearing the TxGSPM bit will also clear the
TxGGO/TxDONE bit. (For timing details, see
Figure 15-4.)
Simultaneously, enabling the Toggle mode and the
Single Pulse mode will permit both sections to work
together. This allows the cycle times on the Timer3/5
gate source to be measured. (For timing details, see
Figure 15-5.)
FIGURE 15-4: TIMER3/5 GATE SINGLE PULSE MODE
TMRxGE
TxGPOL
TxG_IN
TxCKI
TxGVAL
Timer3/5 N N + 1 N + 2
TxGSPM
TxGGO/
TxDONE
Set by Software
Cleared by Hardware on
Falling Edge of TxGVAL
Set by Hardware on
Falling Edge of TxGVAL
Cleared by Software
Cleared by
Software
TMRxGIF
Counting Enabled on
Rising Edge of TxG
2010 Microchip Technology Inc. Preliminary DS39974A-page 229
PIC18F47J13 FAMILY
FIGURE 15-5: TIMER3/5 GATE SINGLE PULSE AND TOGGLE COMBINED MODE
15.5.5 TIMER3/5 GATE VALUE STATUS
When Timer3/5 gate value status is utilized, it is
possible to read the most current level of the gate con-
trol value. The value is stored in the TxGVAL bit
(TxGCON<2>). The TxGVAL bit is valid even when the
Timer3/5 gate is not enabled (TMRxGE bit is cleared).
15.5.6 TIMER3/5 GATE EVENT
INTERRUPT
When the Timer3/5 gate event interrupt is enabled, it is
possible to generate an interrupt upon the completion
of a gate event. When the falling edge of TxGVAL
occurs, the TMRxGIF flag bit in the PIRx register will be
set. If the TMRxGIE bit in the PIEx register is set, then
an interrupt will be recognized.
The TMRxGIF flag bit operates even when the
Timer3/5 gate is not enabled (TMRxGE bit is cleared).
TMRxGE
TxGPOL
TxG_IN
TxCKI
TxGVAL
Timer3/5 NN + 1 N + 2
TxGSPM
TxGGO/
TxDONE
Set by Software
Cleared by Hardware on
Falling Edge of TxGVAL
Set by Hardware on
Falling Edge of TxGVAL
Cleared by Software
Cleared by
Software
TMRxGIF
TxGTM
Counting Enabled on
Rising Edge of TxG
N + 4
N + 3
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DS39974A-page 230 Preliminary 2010 Microchip Technology Inc.
15.6 Timer3/5 Interr upt
The TMRx register pair (TMRxH:TMRxL) increments
from 0000h to FFFFh and overflows to 0000h. The
Timerx interrupt, if enabled, is generated on overflow
and is latched in the interrupt flag bit, TMRxIF.
Table 15-3 gives each module’s flag bit.
This interrupt can be enabled or disabled by setting or
clearing the TMRxIE bit, respectively. Table 15-4 gives
each module’s enable bit.
15.7 Resetting Timer3/5 Using the
ECCP Special Event Trigger
If the ECCP modules are configured to use Timerx and
to generate a Special Event Trigger in Compare mode
(CCPxM<3:0> = 1011), this signal will reset Timerx.
The trigger from ECCP2 will also start an A/D conver-
sion if the A/D module is enabled. (For more informa-
tion, see Section 19.3.4 “Special Event Trigger”.)
The module must be configured as either a timer or
synchronous counter to take advantage of this feature.
When used this way, the CCPRxH:CCPRxL register
pair effectively becomes a Period register for TimerX.
If Timerx is running in Asynchronous Counter mode,
the Reset operation may not work.
In the event that a write to Timerx coincides with a
Special Event Trigger from an ECCP module, the write
will take precedence.
TABLE 15-3: TIMER3/5 INTERRUPT FLAG
BITS
Time r Module Flag Bi t
3 PIR2<1>
5 PIR5<1>
TABLE 15-4: TIMER3/5 INTERRUPT
ENABLE BITS
Time r Module Flag Bi t
3 PIE2<1>
5 PIE5<2>
Note: The Special Event Triggers from the
ECCPx module will only clear the TMR3
register’s content, but not set the TMR3IF
interrupt flag bit (PIR1<0>).
Note: The CCP and ECCP modules use Timers,
1 through 8, for some modes. The assign-
ment of a particular timer to a CCP/ECCP
module is determined by the Timer to CCP
enable bits in the CCPTMRSx registers.
For more details, see Register 18-3 and
Register 19-2.
2010 Microchip Technology Inc. Preliminary DS39974A-page 231
PIC18F47J13 FAMILY
TABLE 15-5: REGISTERS ASSOCIATED WITH TIMER3/5 AS A TIMER/COUNTER
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF
PIR5 — — CM3IF TMR8IF TMR6IF TMR5IF TMR5GIF TMR1GIF
PIE5 — — CM3IE TMR8IE TMR6IE TMR5IE TMR5GIE TMR1GIE
PIR2 OSCFIF CM2IF CM1IF —BCL1IF HLVDIF TMR3IF CCP2IF
PIE2 OSCFIE CM2IE CM1IE —BCL1IE HLVDIE TMR3IE CCP2IE
TMR3H Timer3 Register High Byte
TMR3L Timer3 Register Low Byte
T3GCON TMR3GE T3GPOL T3GTM T3GSPM T3GGO/
T3DONE
T3GVAL T3GSS1 T3GSS0
T3CON TMR3CS1 TMR3CS0 T3CKPS1 T3CKPS0 T3OSCEN T3SYNC RD16 TMR3ON
TMR5H Timer5 Register High Byte
TMR5L Timer5 Register Low Byte
T5GCON TMR5GE T5GPOL T5GTM T5GSPM T5GGO/
T5DONE
T5GVAL T5GSS1 T5GSS0
T5CON TMR5CS1 TMR5CS0 T5CKPS1 T5CKPS0 T5OSCEN T5SYNC RD16 TMR5ON
OSCCON2 — SOSCRUN —SOSCDRV SOSCGO ———
CCPTMRS0 C3TSEL1 C3TSEL0 C2TSEL2 C2TSEL1 C2TSEL0 C1TSEL2 C1TSEL1 C1TSEL0
CCPTMRS1 C7TSEL1 C7TSEL0 — C6TSEL0 — C5TSEL0 C4TSEL1 C4TSEL0
CCPTMRS1 ——— C10TSEL0 — C9TSEL0 C8TSEL1 C8TSEL0
CCPTMRS2 ———C10TSEL0— C9TSEL0 C8TSEL1 C8TSEL0
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used by the Timer3 module.
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DS39974A-page 232 Preliminary 2010 Microchip Technology Inc.
NOTES:
2010 Microchip Technology Inc. Preliminary DS39974A-page 233
PIC18F47J13 FAMILY
16.0 TIMER4/6/8 MODULE
The Timer4/6/8 timer modules have the following
features:
• Eight-bit Timer register (TMRx)
• Eight-bit Period register (PRx)
• Readable and writable (all registers)
• Software programmable prescaler (1:1, 1:4, 1:16)
• Software programmable postscaler (1:1 to 1:16)
• Interrupt on TMRx match of PRx
The Timer4/6/8 modules have a control register shown
in Register 16-1. Timer4/6/8 can be shut off by clearing
control bit, TMRxON (TxCON<2>), to minimize power
consumption. The prescaler and postscaler selection of
Timer4/6/8 is also controlled by this register.
Figure 16-1 is a simplified block diagram of the
Timer4/6/8 modules.
16.1 Timer4/6/8 Operation
Timer4/6/8 can be used as the PWM time base for the
PWM mode of the ECCP modules. The TMRx registers
are readable and writable, and are cleared on any
device Reset. The input clock (FOSC/4) has a prescale
option of 1:1, 1:4 or 1:16, selected by control bits,
TxCKPS<1:0> (TxCON<1:0>). The match output of
TMRx goes through a four-bit postscaler (that gives a
1:1 to 1:16 inclusive scaling) to generate a TMRx
interrupt, latched in the flag bit, TMRxIF. Table 16-1
gives each module’s flag bit.
The interrupt can be enabled or disabled by setting or
clearing the Timerx Interrupt Enable bit (TMRxIE),
shown in Table 16-2.
The prescaler and postscaler counters are cleared
when any of the following occurs:
• A write to the TMRx register
• A write to the TxCON register
• Any device Reset (Power-on Reset (POR), MCLR
Reset, Watchdog Timer Reset (WDTR) or
Brown-out Reset (BOR))
A TMRx is not cleared when a TxCON is written.
Note: Throughout this section, generic references
are used for register and bit names that are the
same – except for an ‘x’ variable that indicates
the item’s association with the Timer4, Timer6
or Timer8 module. For example, the control
register is named TxCON and refers to
T4CON, T6CON and T8CON.
TABLE 16-1: TIMER4/6/8 FLAG BITS
Timer Module Flag Bit
4PIR3<3>
6PIR5<3>
8PIR5<4>
TABLE 16-2: TIMER4/6/8 INTERRUPT
ENABLE BITS
Timer Module Flag Bit
4PIE3<3>
6PIE5<3>
8PIE5<4>
Note: The CCP and ECCP modules use Timers,
1 through 8, for some modes. The assign-
ment of a particular timer to a CCP/ECCP
module is determined by the Timer to CCP
enable bits in the CCPTMRSx registers.
For more details, see Register 18-2,
Register 18-3 and Register 19-2.
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DS39974A-page 234 Preliminary 2010 Microchip Technology Inc.
16.2 Timer4/6/8 Interrupt
The Timer4/6/8 modules have 8-bit Period registers,
PRx, that are both readable and writable. Timer4/6/8
increment from 00h until they match PR4/6/8 and then
reset to 00h on the next increment cycle. The PRx
registers are initialized to FFh upon Reset.
16.3 Output of TMRx
The outputs of TMRx (before the postscaler) are used
only as a PWM time base for the ECCP modules. They
are not used as baud rate clocks for the MSSP
modules as is the Timer2 output.
FIGU RE 16 -1: TI MER 4 BLOCK DIAGRA M
REGISTER 16-1: TxCON: TIMER4/6/8 CONTROL REGISTER (ACCESS F76h, BANKED F1Eh,
BANKED F1Bh)
U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— TxOUTPS3 TxOUTPS2 TxOUTPS1 TxOUTPS0 TMRxON TxCKPS1 TxCKPS0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 Unimplemented: Read as ‘0’
bit 6-3 TxOUTPS<3:0>: Timerx Output Postscale Select bits
0000 = 1:1 Postscale
0001 = 1:2 Postscale
•
•
•
1111 = 1:16 Postscale
bit 2 TMRxON: Timerx On bit
1 = Timerx is on
0 = Timerx is off
bit 1-0 TxCKPS<1:0>: Timerx Clock Prescale Select bits
00 = Prescaler is 1
01 = Prescaler is 4
1x = Prescaler is 16
Comparator
TMRx Output
TMRx
Postscaler
Prescaler PRx
2
FOSC/4
1:1 to 1:16
1:1, 1:4, 1:16
4
TxOUTPS<3:0>
TxCKPS<1:0>
Set TMRxIF
Internal Data Bus
8
Reset
TMRx/PRx
8
8
(to PWM)
Match
2010 Microchip Technology Inc. Preliminary DS39974A-page 235
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TABLE 16-3: REGISTERS ASSOCIATED WITH TIMER4/6/8 AS A TIMER/COUNTER
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF
IPR5 — — CM3IP TMR8IP TMR6IP TMR5IP TMR5GIP TMR1GIP
PIR5 — — CM3IF TMR8IF TMR6IF TMR5IF TMR5GIF TMR1GIF
PIE5 — — CM3IE TMR8IE TMR6IE TMR5IE TMR5GIE TMR1GIE
TMR4 Timer4 Register
T4CON — T4OUTPS3 T4OUTPS2 T4OUTPS1 T4OUTPS0 TMR4ON T4CKPS1 T4CKPS0
PR4 Timer4 Period Register
TMR6 Timer6 Register
T6CON — T6OUTPS3 T6OUTPS2 T6OUTPS1 T6OUTPS0 TMR6ON T6CKPS1 T6CKPS0
PR6 Timer6 Period Register
TMR8 Timer8 Register
T8CON — T8OUTPS3 T8OUTPS2 T8OUTPS1 T8OUTPS0 TMR8ON T8CKPS1 T8CKPS0
PR8 Timer8 Period Register
CCPTMRS0 C3TSEL1 C3TSEL0 C2TSEL2 C2TSEL1 C2TSEL0 C1TSEL2 C1TSEL1 C1TSEL0
CCPTMRS1 C7TSEL1 C7TSEL0 — C6TSEL0 — C5TSEL0 C4TSEL1 C4TSEL0
CCPTMRS2 — — — C10TSEL0 — C9TSEL0 C8TSEL1 C8TSEL0
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used by the Timer4/6/8 modules.
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NOTES:
2010 Microchip Technology Inc. Preliminary DS39974A-page 237
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17.0 REAL-TIME CLOCK AND
CALENDAR (RTCC)
The key features of the Real-Time Clock and Calendar
(RTCC) module are:
• Time: hours, minutes and seconds
• 24-hour format (military time)
• Calendar: weekday, date, month and year
• Alarm configurable
• Year range: 2000 to 2099
• Leap year correction
• BCD format for compact firmware
• Optimized for low-power operation
• User calibration with auto-adjust
• Calibration range: 2.64 seconds error per month
• Requirements: external 32.768 kHz clock crystal
• Alarm pulse or seconds clock output on RTCC pin
The RTCC module is intended for applications where
accurate time must be maintained for an extended
period with minimum to no intervention from the CPU.
The module is optimized for low-power usage in order
to provide extended battery life while keeping track of
time.
The module is a 100-year clock and calendar with auto-
matic leap year detection. The range of the clock is
from 00:00:00 (midnight) on January 1, 2000 to
23:59:59 on December 31, 2099. Hours are measured
in 24-hour (military time) format. The clock provides a
granularity of one second with half second visibility to
the user.
FIGU RE 17-1: RTCC B LOC K DI AG R AM
RTCC Prescalers
RTCC Timer
Comparator
Compare Registers
Repeat Counter
YEAR
MTHDY
WKDYHR
MINSEC
ALMTHDY
ALWDHR
ALMINSEC
with Masks
RTCC Interrupt Logic
RTCCFG
ALRMRPT
Alarm
Event
0.5s
RTCC Clock Domain
Alarm Pulse
RTCC Interrupt
CPU Clock Domain
RTCVAL
ALRMVAL
RTCC Pin
RTCOE
Internal RC
32.768 kHz Input
from Timer1 Oscillator
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DS39974A-page 238 Preliminary 2010 Microchip Technology Inc.
17.1 RTCC MODULE REGISTERS
The RTCC module registers are divided into following
categories:
RTCC Control Registers
• RTCCFG
• RTCCAL
• PADCFG1
•ALRMCFG
•ALRMRPT
RTCC Value Registers
• RTCVALH and RTCVALL – Can access the
following registers
- YEAR
-MONTH
-DAY
- WEEKDAY
-HOUR
- MINUTE
- SECOND
Alarm Value Registers
• ALRMVALH and ALRMVALL – Can access the
following registers:
- ALRMMNTH
-ALRMDAY
-ALRMWD
-ALRMHR
- ALRMMIN
- ALRMSEC
Note: The RTCVALH and RTCVALL registers
can be accessed through RTCRPT<1:0>.
ALRMVALH and ALRMVALL can be
accessed through ALRMPTR<1:0>.
2010 Microchip Technology Inc. Preliminary DS39974A-page 239
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17.1.1 RTCC CONTROL REGISTERS
REGISTER 17-1: RTCCFG: RTCC CONFIGURATION REGISTER (BANKED F3Fh)(1)
R/W-0 U-0 R/W-0 R-0 R-0 R/W-0 R/W-0 R/W-0
RTCEN(2) — RTCWREN RTCSYNC HALFSEC(3) RTCOE RTCPTR1 RTCPTR0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 RTCEN: RTCC Enable bit(2)
1 = RTCC module is enabled
0 = RTCC module is disabled
bit 6 Unimplemented: Read as ‘0’
bit 5 RTCWREN: RTCC Value Registers Write Enable bit
1 = RTCVALH and RTCVALL registers can be written to by the user
0 = RTCVALH and RTCVALL registers are locked out from being written to by the user
bit 4 RTCSYNC: RTCC Value Registers Read Synchronization bit
1 = RTCVALH, RTCVALL and ALCFGRPT registers can change while reading due to a rollover ripple
resulting in an invalid data read
If the register is read twice and results in the same data, the data can be assumed to be valid.
0 = RTCVALH, RTCVALL or ALCFGRPT registers can be read without concern over a rollover ripple
bit 3 HALFSEC: Half-Second Status bit(3)
1 = Second half period of a second
0 = First half period of a second
bit 2 RTCOE: RTCC Output Enable bit
1 = RTCC clock output enabled
0 = RTCC clock output disabled
bit 1-0 RTCPTR<1:0>: RTCC Value Register Window Pointer bits
Points to the corresponding RTCC Value registers when reading the RTCVALH and RTCVALL registers.
The RTCPTR<1:0> value decrements on every read or write of RTCVALH until it reaches ‘00’.
RTCVAL<15:8>:
00 = Minutes
01 = Weekday
10 = Month
11 = Reserved
RTCVAL<7:0>:
00 = Seconds
01 = Hours
10 = Day
11 = Year
Note 1: The RTCCFG register is only affected by a POR.
2: A write to the RTCEN bit is only allowed when RTCWREN = 1.
3: This bit is read-only. It is cleared to ‘0’ on a write to the lower half of the MINSEC register.
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DS39974A-page 240 Preliminary 2010 Microchip Technology Inc.
REGISTER 17-2: RTCCAL: RTCC CALIBRATION REGISTER (BANKED F3Eh)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CAL7 CAL6 CAL5 CAL4 CAL3 CAL2 CAL1 CAL0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-0 CAL<7:0>: RTCC Drift Calibration bits
01111111 = Maximum positive adjustment; adds 508 RTC clock pulses every minute
.
.
.
00000001 = Minimum positive adjustment; adds four RTCC clock pulses every minute
00000000 = No adjustment
11111111 = Minimum negative adjustment; subtracts four RTCC clock pulses every minute
.
.
.
10000000 = Maximum negative adjustment; subtracts 512 RTCC clock pulses every minute
REGISTER 17-3: PADCFG1: PAD CONFIGURATION REGISTER 1 (BANKED F3Ch)
U-0 U-0 U-0 U-0 U-0 R/W-0 R/W-0 R/W-0
— — — — — RTSECSEL1(1) RTSECSEL0(1) PMPTTL(2)
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-3 Unimplemented: Read as ‘0’
bit 2-1 RTSECSEL<1:0>: RTCC Seconds Clock Output Select bits(1)
11 = Reserved; do not use
10 = RTCC source clock is selected for the RTCC pin (pin can be INTRC or T1OSC, depending on the
RTCOSC (CONFIG3L<1>) setting)
01 = RTCC seconds clock is selected for the RTCC pin
00 = RTCC alarm pulse is selected for the RTCC pin
bit 0 PMPTTL: PMP Module TTL Input Buffer Select bit(2)
1 = PMP module uses TTL input buffers
0 = PMP module uses Schmitt input buffers
Note 1: To enable the actual RTCC output, the RTCOE (RTCCFG<2>) bit must be set.
2: Available only on 44-pin devices (PIC18F46J13, PIC18F47J13, PIC18LF46J13 and PIC18LF47J13). For
28-pin devices, the bit is U-0.
2010 Microchip Technology Inc. Preliminary DS39974A-page 241
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REGISTER 17-4: ALRMCFG: ALARM CONFIGURATION REGISTER (ACCESS F47h)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
ALRMEN CHIME AMASK3 AMASK2 AMASK1 AMASK0 ALRMPTR1 ALRMPTR0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 ALRMEN: Alarm Enable bit
1 = Alarm is enabled (cleared automatically after an alarm event whenever ARPT<7:0> = 0000 0000
and CHIME = 0)
0 = Alarm is disabled
bit 6 CHIME: Chime Enable bit
1 = Chime is enabled; ARPT<7:0> bits are allowed to roll over from 00h to FFh
0 = Chime is disabled; ARPT<7:0> bits stop once they reach 00h
bit 5-2 AMASK<3:0>: Alarm Mask Configuration bits
0000 = Every half second
0001 = Every second
0010 = Every 10 seconds
0011 = Every minute
0100 = Every 10 minutes
0101 = Every hour
0110 = Once a day
0111 = Once a week
1000 = Once a month
1001 = Once a year (except when configured for February 29th, once every four years)
101x = Reserved – do not use
11xx = Reserved – do not use
bit 1-0 ALRMPTR<1:0>: Alarm Value Register Window Pointer bits
Points to the corresponding Alarm Value registers when reading the ALRMVALH and ALRMVALL
registers. The ALRMPTR<1:0> value decrements on every read or write of ALRMVALH until it reaches
‘00’.
ALRMVAL<15:8>:
00 = ALRMMIN
01 =ALRMWD
10 =ALRMMNTH
11 = Unimplemented
ALRMVAL<7:0>:
00 = ALRMSEC
01 =ALRMHR
10 =ALRMDAY
11 = Unimplemented
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REGISTER 17-5: ALRMRPT: ALARM REPEAT COUNTER (ACCESS F46h)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
ARPT7 ARPT6 ARPT5 ARPT4 ARPT3 ARPT2 ARPT1 ARPT0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-0 ARPT<7:0>: Alarm Repeat Counter Value bits
11111111 = Alarm will repeat 255 more times
.
.
.
00000000 = Alarm will not repeat
The counter decrements on any alarm event. The counter is prevented from rolling over from 00h to
FFh unless CHIME = 1.
2010 Microchip Technology Inc. Preliminary DS39974A-page 243
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17.1.2 RTCVALH AND RTCVALL
REGISTER MAPPINGS
REGISTER 17-6: RESERVED REGISTER
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-0 Unimplemented: Read as ‘0’
REGISTER 17-7: YEAR: YEAR VALUE REGISTER(1)
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
YRTEN3 YRTEN2 YRTEN1 YRTEN0 YRONE3 YRONE2 YRONE1 YRONE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-4 YRTEN<3:0>: Binary Coded Decimal Value of Year’s Tens Digit bits
Contains a value from 0 to 9.
bit 3-0 YRONE<3:0>: Binary Coded Decimal Value of Year’s Ones Digit bits
Contains a value from 0 to 9.
Note 1: A write to the YEAR register is only allowed when RTCWREN = 1.
REGISTER 17-8: MONTH: MONTH VALUE REGIS TER(1)
U-0 U-0 U-0 R/W-x R/W-x R/W-x R/W-x R/W-x
— — — MTHTEN0 MTHONE3 MTHONE2 MTHONE1 MTHONE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4 MTHTEN0: Binary Coded Decimal Value of Month’s Tens Digit bit
Contains a value of 0 or 1.
bit 3-0 MTHONE<3:0>: Binary Coded Decimal Value of Month’s Ones Digit bits
Contains a value from 0 to 9.
Note 1: A write to this register is only allowed when RTCWREN = 1.
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REGISTER 17-9: DAY: DAY VALUE REGISTER(1)
U-0 U-0 R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
—— DAYTEN1 DAYTEN0 DAYONE3 DAYONE2 DAYONE1 DAYONE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-6 Unimplemented: Read as ‘0’
bit 5-4 DAYTEN<1:0>: Binary Coded Decimal value of Day’s Tens Digit bits
Contains a value from 0 to 3.
bit 3-0 DAYONE<3:0>: Binary Coded Decimal Value of Day’s Ones Digit bits
Contains a value from 0 to 9.
Note 1: A write to this register is only allowed when RTCWREN = 1.
REGISTER 17-10: WKDY: WEEKDAY VALUE REGISTER(1)
U-0 U-0 U-0 U-0 U-0 R/W-x R/W-x R/W-x
— — — — — WDAY2 WDAY1 WDAY0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-3 Unimplemented: Read as ‘0’
bit 2-0 WDAY<2:0>: Binary Coded Decimal Value of Weekday Digit bits
Contains a value from 0 to 6.
Note 1: A write to this register is only allowed when RTCWREN = 1.
2010 Microchip Technology Inc. Preliminary DS39974A-page 245
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REGISTER 17-11: HOURS: HOURS VALUE REGISTER(1)
U-0 U-0 R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
—— HRTEN1 HRTEN0 HRONE3 HRONE2 HRONE1 HRONE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-6 Unimplemented: Read as ‘0’
bit 5-4 HRTEN<1:0>: Binary Coded Decimal Value of Hour’s Tens Digit bits
Contains a value from 0 to 2.
bit 3-0 HRONE<3:0>: Binary Coded Decimal Value of Hour’s Ones Digit bits
Contains a value from 0 to 9.
Note 1: A write to this register is only allowed when RTCWREN = 1.
REGISTER 17-12: MINUTES: MINUTES VALUE REGISTER
U-0 R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
— MINTEN2 MINTEN1 MINTEN0 MINONE3 MINONE2 MINONE1 MINONE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 Unimplemented: Read as ‘0’
bit 6-4 MINTEN<2:0>: Binary Coded Decimal Value of Minute’s Tens Digit bits
Contains a value from 0 to 5.
bit 3-0 MINONE<3:0>: Binary Coded Decimal Value of Minute’s Ones Digit bits
Contains a value from 0 to 9.
REGISTER 17-13: SECONDS: SECONDS VALUE REGISTER
U-0 R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
— SECTEN2 SECTEN1 SECTEN0 SECONE3 SECONE2 SECONE1 SECONE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 Unimplemented: Read as ‘0’
bit 6-4 SECTEN<2:0>: Binary Coded Decimal Value of Second’s Tens Digit bits
Contains a value from 0 to 5.
bit 3-0 SECONE<3:0>: Binary Coded Decimal Value of Second’s Ones Digit bits
Contains a value from 0 to 9.
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DS39974A-page 246 Preliminary 2010 Microchip Technology Inc.
17.1.3 ALRMVALH AND ALRMVALL
REGISTER MAPPINGS
REGISTER 17-14: ALRMMNTH: ALARM MONTH VALUE REGISTER(1)
U-0 U-0 U-0 R/W-x R/W-x R/W-x R/W-x R/W-x
— — — MTHTEN0 MTHONE3 MTHONE2 MTHONE1 MTHONE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4 MTHTEN0: Binary Coded Decimal Value of Month’s Tens Digit bit
Contains a value of 0 or 1.
bit 3-0 MTHONE<3:0>: Binary Coded Decimal Value of Month’s Ones Digit bits
Contains a value from 0 to 9.
Note 1: A write to this register is only allowed when RTCWREN = 1.
REGISTER 17-15: ALRMDAY: ALARM DAY VALUE REGISTER(1)
U-0 U-0 R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
—— DAYTEN1 DAYTEN0 DAYONE3 DAYONE2 DAYONE1 DAYONE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-6 Unimplemented: Read as ‘0’
bit 5-4 DAYTEN<1:0>: Binary Coded Decimal Value of Day’s Tens Digit bits
Contains a value from 0 to 3.
bit 3-0 DAYONE<3:0>: Binary Coded Decimal Value of Day’s Ones Digit bits
Contains a value from 0 to 9.
Note 1: A write to this register is only allowed when RTCWREN = 1.
2010 Microchip Technology Inc. Preliminary DS39974A-page 247
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REGISTER 17-16: ALRMWD: ALARM WEEKDAY VALUE REGISTER(1)
U-0 U-0 U-0 U-0 U-0 R/W-x R/W-x R/W-x
— — — — — WDAY2 WDAY1 WDAY0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-3 Unimplemented: Read as ‘0’
bit 2-0 WDAY<2:0>: Binary Coded Decimal Value of Weekday Digit bits
Contains a value from 0 to 6.
Note 1: A write to this register is only allowed when RTCWREN = 1.
REGISTER 17-17: ALRMHR: ALARM HOURS VALUE REGISTER(1)
U-0 U-0 R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
—— HRTEN1 HRTEN0 HRONE3 HRONE2 HRONE1 HRONE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-6 Unimplemented: Read as ‘0’
bit 5-4 HRTEN<1:0>: Binary Coded Decimal Value of Hour’s Tens Digit bits
Contains a value from 0 to 2.
bit 3-0 HRONE<3:0>: Binary Coded Decimal Value of Hour’s Ones Digit bits
Contains a value from 0 to 9.
Note 1: A write to this register is only allowed when RTCWREN = 1.
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DS39974A-page 248 Preliminary 2010 Microchip Technology Inc.
REGISTER 17-18: ALRMMIN: ALARM MINUTES VALUE REGISTER
U-0 R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
— MINTEN2 MINTEN1 MINTEN0 MINONE3 MINONE2 MINONE1 MINONE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 Unimplemented: Read as ‘0’
bit 6-4 MINTEN<2:0>: Binary Coded Decimal Value of Minute’s Tens Digit bits
Contains a value from 0 to 5.
bit 3-0 MINONE<3:0>: Binary Coded Decimal Value of Minute’s Ones Digit bits
Contains a value from 0 to 9.
REGISTER 17-19: ALRMSEC: ALARM SECONDS VALUE REGISTER
U-0 R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
— SECTEN2 SECTEN1 SECTEN0 SECONE3 SECONE2 SECONE1 SECONE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 Unimplemented: Read as ‘0’
bit 6-4 SECTEN<2:0>: Binary Coded Decimal Value of Second’s Tens Digit bits
Contains a value from 0 to 5.
bit 3-0 SECONE<3:0>: Binary Coded Decimal Value of Second’s Ones Digit bits
Contains a value from 0 to 9.
2010 Microchip Technology Inc. Preliminary DS39974A-page 249
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17.1.4 RTCEN BIT WRITE
An attempt to write to the RTCEN bit while
RTCWREN = 0 will be ignored. RTCWREN must be
set before a write to RTCEN can take place.
Like the RTCEN bit, the RTCVALH and RTCVALL
registers can only be written to when RTCWREN = 1.
A write to these registers, while RTCWREN = 0, will be
ignored.
17.2 Operation
17.2.1 REGISTER INTERFACE
The register interface for the RTCC and alarm values is
implemented using the Binary Coded Decimal (BCD)
format. This simplifies the firmware when using the
module, as each of the digits is contained within its own
4-bit value (see Figure 17-2 and Figure 17-3).
FIGURE 17-2: TIMER DIGIT FORMAT
FIGURE 17-3: ALARM DIGIT FORMAT
0-60-9 0-9 0-3 0-9
0-9 0-9 0-90-2 0-5 0-5 0/1
Day of WeekYear Day
Hours
(24-hour format) Minutes Seconds 1/2 Second Bit
0-1 0-9
Month
(binary format)
0-60-3 0-9
0-9 0-9 0-90-2 0-5 0-5
Day of WeekDay
Hours
(24-hour format) Minutes Seconds
0-1 0-9
Month
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17.2.2 CLOCK SOURCE
As mentioned earlier, the RTCC module is intended to
be clocked by an external Real-Time Clock (RTC)
crystal oscillating at 32.768 kHz, but can also be
clocked by the INTRC. The RTCC clock selection is
decided by the RTCOSC bit (CONFIG3L<1>).
Calibration of the crystal can be done through this
module to yield an error of 3 seconds or less per month.
(For further details, see Section 17.2.9 “Calibration”.)
FIGURE 17-4: CLOCK SOURCE MULTIPLEXING
17.2.2.1 Real-Time Clock Enable
The RTCC module can be clocked by an external,
32.768 kHz crystal (Timer1 oscillator or T1CKI input) or
the INTRC oscillator, which can be selected in
CONFIG3L<1>.
If the Timer1 oscillator will be used as the clock source
for the RTCC, make sure to enable it by setting
T1CON<3> (T1OSCEN). The selected RTC clock can
be brought out to the RTCC pin by the
RTSECSEL<1:0> bits in the PADCFG1 register.
17.2.3 DIGIT CARRY RULES
This section explains which timer values are affected
when there is a rollover.
• Time of Day: From 23:59:59 to 00:00:00 with a
carry to the Day field
• Month: From 12/31 to 01/01 with a carry to the
Year field
• Day of Week: From 6 to 0 with no carry (see
Table 17-1)
• Year Carry: From 99 to 00; this also surpasses the
use of the RTCC
For the day to month rollover schedule, see Table 17-2.
Considering that the following values are in BCD
format, the carry to the upper BCD digit will occur at a
count of 10 and not at 16 (SECONDS, MINUTES,
HOURS, WEEKDAY, DAYS and MONTHS).
TABLE 17-1: DAY OF WEEK SCHEDULE
Note 1: Writing to the lower half of the MINSEC register resets all counters, allowing fraction of a second synchronization.
The clock prescaler is held in Reset when RTCEN = 0.
32.768 kHz XTAL
1:16384
Half Second(1)
Half Second
Clock One Second Clock
Yea r
Month
Day
Day of Week
Second Hour:Minute
Clock Prescaler(1)
from T1OSC
Internal RC
CONFIG 3L<1>
Day of Week
Sunday 0
Monday 1
Tuesday 2
Wednesday 3
Thursday 4
Friday 5
Saturday 6
2010 Microchip Technology Inc. Preliminary DS39974A-page 251
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TABLE 17-2: DAY TO MONTH ROLLOVER
SCHEDULE
17.2.4 LEAP YEAR
Since the year range on the RTCC module is 2000 to
2099, the leap year calculation is determined by any
year divisible by four in the above range. Only February
is effected in a leap year.
February will have 29 days in a leap year and 28 days in
any other year.
17.2.5 GENERAL FUNCTIONALITY
All Timer registers containing a time value of seconds or
greater are writable. The user configures the time by
writing the required year, month, day, hour, minutes and
seconds to the Timer registers, via register pointers (see
Section 17.2.8 “Register Mapping”).
The timer uses the newly written values and proceeds
with the count from the required starting point.
The RTCC is enabled by setting the RTCEN bit
(RTCCFG<7>). If enabled, while adjusting these
registers, the timer still continues to increment. However,
any time the MINSEC register is written to, both of the
timer prescalers are reset to ‘0’. This allows fraction of a
second synchronization.
The Timer registers are updated in the same cycle as
the write instruction’s execution by the CPU. The user
must ensure that when RTCEN = 1, the updated
registers will not be incremented at the same time. This
can be accomplished in several ways:
• By checking the RTCSYNC bit (RTCCFG<4>)
• By checking the preceding digits from which a
carry can occur
• By updating the registers immediately following
the seconds pulse (or alarm interrupt)
The user has visibility to the half second field of the
counter. This value is read-only and can be reset only
by writing to the lower half of the SECONDS register.
17.2.6 SAFETY WINDOW FOR REGISTER
READS AND WRITES
The RTCSYNC bit indicates a time window during
which the RTCC Clock Domain registers can be safely
read and written without concern about a rollover.
When RTCSYNC = 0, the registers can be safely
accessed by the CPU.
Whether RTCSYNC = 1 or 0, the user should employ a
firmware solution to ensure that the data read did not
fall on a rollover boundary, resulting in an invalid or
partial read. This firmware solution would consist of
reading each register twice and then comparing the two
values. If the two values matched, then, a rollover did
not occur.
17.2.7 WRITE LOCK
In order to perform a write to any of the RTCC Timer
registers, the RTCWREN bit (RTCCFG<5>) must be
set.
To avoid accidental writes to the RTCC Timer register,
it is recommended that the RTCWREN bit
(RTCCFG<5>) be kept clear at any time other than
while writing to it. For the RTCWREN bit to be set, there
is only one instruction cycle time window allowed
between the 55h/AA sequence and the setting of
RTCWREN. For that reason, it is recommended that
users follow the code example in Example 17-1.
EXAMPLE 17-1: SETTING THE RTCWREN
BIT
17.2.8 REGISTER MAPPING
To limit the register interface, the RTCC Timer and
Alarm Timer registers are accessed through
corresponding register pointers. The RTCC Value reg-
ister window (RTCVALH<15:8> and RTCVALL<7:0>)
uses the RTCPTR bits (RTCCFG<1:0>) to select the
required Timer register pair.
By reading or writing to the RTCVALH register, the
RTCC Pointer value (RTCPTR<1:0>) decrements by 1
until it reaches ‘00’. Once it reaches ‘00’, the MINUTES
and SECONDS value will be accessible through
RTCVALH and RTCVALL until the pointer value is
manually changed.
Month Maximum Day F ield
01 (January) 31
02 (February) 28 or 29(1)
03 (March) 31
04 (April) 30
05 (May) 31
06 (June) 30
07 (July) 31
08 (August) 31
09 (September) 30
10 (October) 31
11 (November) 30
12 (December) 31
Note 1: See Section 17.2.4 “Leap Year”.
movlb 0x0F ;RTCCFG is banked
bcf INTCON, GIE ;Disable interrupts
movlw 0x55
movwf EECON2
movlw 0xAA
movwf EECON2
bsf RTCCFG, RTCWREN
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TABLE 17-3: RTCVALH AND RTCVALL
REGISTER MAPPING
The Alarm Value register window (ALRMVALH and
ALRMVALL) uses the ALRMPTR bits (ALRMCFG<1:0>)
to select the desired Alarm register pair.
By reading or writing to the ALRMVALH register, the
Alarm Pointer value, ALRMPTR<1:0>, decrements
by 1 until it reaches ‘00’. Once it reaches ‘00’, the
ALRMMIN and ALRMSEC value will be accessible
through ALRMVALH and ALRMVALL until the pointer
value is manually changed.
TABLE 17-4: ALRMVAL REGISTER
MAPPING
17.2.9 CALIBRATION
The real-time crystal input can be calibrated using the
periodic auto-adjust feature. When properly calibrated,
the RTCC can provide an error of less than three
seconds per month.
To perform this calibration, find the number of error
clock pulses and store the value in the lower half of the
RTCCAL register. The 8-bit, signed value, loaded into
RTCCAL, is multiplied by four and will either be added
or subtracted from the RTCC timer, once every minute.
To calibrate the RTCC module:
1. Use another timer resource on the device to find
the error of the 32.768 kHz crystal.
2. Convert the number of error clock pulses per
minute (see Equation 17-1).
EQUATION 17-1: CONVERTING ERROR
CLOCK PULSES
• If the oscillator is faster than ideal (negative
result from Step 2), the RTCCFG register value
needs to be negative. This causes the specified
number of clock pulses to be subtracted from
the timer counter, once every minute.
• If the oscillator is slower than ideal (positive
result from Step 2), the RTCCFG register value
needs to be positive. This causes the specified
number of clock pulses to be added to the timer
counter, once every minute.
3. Load the RTCCAL register with the correct
value.
Writes to the RTCCAL register should occur only when
the timer is turned off, or immediately after the rising
edge of the seconds pulse.
RTCPTR<1:0> RTCC Value Register Window
RTCVAL<15:8> RTCVAL<7:0>
00 MINUTES SECONDS
01 WEEKDAY HOURS
10 MONTH DAY
11 — YEAR
ALRMPTR<1:0> Alarm Value Register Window
ALRMVAL<15:8> ALRMVAL<7:0>
00 ALRMMIN ALRMSEC
01 ALRMWD ALRMHR
10 ALRMMNTH ALRMDAY
11 ——
Note: In determining the crystal’s error value, it
is the user’s responsibility to include the
crystal’s initial error from drift due to
temperature or crystal aging.
(Ideal Frequency (32,768) – Measured Frequency) *
60 = Error Clocks per Minute
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17.3 Alarm
The alarm features and characteristics are:
• Configurable from half a second to one year
• Enabled using the ALRMEN bit (ALRMCFG<7>,
Register 17-4)
• Offers one time and repeat alarm options
17.3.1 CONFIGURING THE ALARM
The alarm feature is enabled using the ALRMEN bit.
This bit is cleared when an alarm is issued. The bit will
not be cleared if the CHIME bit = 1 or if ALRMRPT 0.
The interval selection of the alarm is configured
through the ALRMCFG (AMASK<3:0>) bits (see
Figure 17-5). These bits determine which and how
many digits of the alarm must match the clock value for
the alarm to occur.
The alarm can also be configured to repeat based on a
preconfigured interval. The number of times this
occurs, after the alarm is enabled, is stored in the
ALRMRPT register.
FIGURE 17-5: ALARM MASK SE TTINGS
Note: While the alarm is enabled (ALRMEN = 1),
changing any of the registers, other than
the RTCCAL, ALRMCFG and ALRMRPT
registers, and the CHIME bit, can result in
a false alarm event leading to a false
alarm interrupt. To avoid this, only change
the timer and alarm values while the alarm
is disabled (ALRMEN = 0). It is recom-
mended that the ALRMCFG and
ALRMRPT registers and CHIME bit be
changed when RTCSYNC = 0.
Note 1: Annually, except when configured for February 29.
s
ss
mss
mm s s
hh mm ss
dhhmmss
dd hh mm ss
mm d d h h mm s s
Day of the
Week Month Day Hours Minutes Seconds
Alarm Mask Setting
AMASK<3:0>
0000 – Every half second
0001 – Every second
0010 – Every 10 seconds
0011 – Every minute
0100 – Every 10 minutes
0101 – Every hour
0110 – Every day
0111 – Every week
1000 – Every month
1001 – Every year(1)
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DS39974A-page 254 Preliminary 2010 Microchip Technology Inc.
When ALRMCFG = 00 and the CHIME bit = 0
(ALRMCFG<6>), the repeat function is disabled and
only a single alarm will occur. The alarm can be
repeated up to 255 times by loading the ALRMRPT
register with FFh.
After each alarm is issued, the ALRMRPT register is
decremented by one. Once the register has reached
‘00’, the alarm will be issued one last time.
After the alarm is issued a last time, the ALRMEN bit is
cleared automatically and the alarm turned off. Indefinite
repetition of the alarm can occur if the CHIME bit = 1.
When CHIME = 1, the alarm is not disabled when the
ALRMRPT register reaches ‘00’, but it rolls over to FF
and continues counting indefinitely.
17.3.2 ALARM INTERRUPT
At every alarm event, an interrupt is generated. Addi-
tionally, an alarm pulse output is provided that operates
at half the frequency of the alarm.
The alarm pulse output is completely synchronous with
the RTCC clock and can be used as a trigger clock to
other peripherals. This output is available on the RTCC
pin. The output pulse is a clock with a 50% duty cycle
and a frequency half that of the alarm event (see
Figure 17-6).
The RTCC pin can also output the seconds clock. The
user can select between the alarm pulse, generated by
the RTCC module, or the seconds clock output.
The RTSECSEL (PADCFG1<2:1>) bits select between
these two outputs:
• Alarm pulse – RTSECSEL<2:1> = 00
• Seconds clock – RTSECSEL<2:1> = 01
FI GU RE 1 7 - 6 : T I ME R PULSE GENERATI ON
17.4 Low-Power Modes
The timer and alarm can optionally continue to operate
while in Sleep, Idle and even Deep Sleep mode. An
alarm event can be used to wake-up the microcontroller
from any of these Low-Power modes.
17.5 Reset
17.5.1 DEVICE RESET
When a device Reset occurs, the ALCFGRPT register
is forced to its Reset state, causing the alarm to be dis-
abled (if enabled prior to the Reset). If the RTCC was
enabled, it will continue to operate when a basic device
Reset occurs.
17.5.2 POWER-ON RESET (POR)
The RTCCFG and ALRMRPT registers are reset only
on a POR. Once the device exits the POR state, the
clock registers should be reloaded with the desired
values.
The timer prescaler values can be reset only by writing
to the SECONDS register. No device Reset can affect
the prescalers.
RTCEN bit
ALRMEN bit
RTCC Alarm Event
RTCC Pin
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17.6 Register Maps
Table 17-5, Table 17-6 and Table 17-7 summarize the
registers associated with the RTCC module.
TABLE 17-5: RTCC CONTROL REGISTERS
File N a m e Bi t 7 Bit 6 B it 5 Bit 4 Bit 3 Bit 2 B it 1 Bit 0 All
Resets
RTCCFG RTCEN — RTCWREN RTCSYNC HALFSEC RTCOE RTCPTR1 RTCPTR0 0000
RTCCAL CAL7 CAL6 CAL5 CAL4 CAL3 CAL2 CAL1 CAL0 0000
PADCFG1 — — — — — RTSECSEL1 RTSECSEL0 PMPTTL 0000
ALRMCFG ALRMEN CHIME AMASK3 AMASK2 AMASK1 AMASK0 ALRMPTR1 ALRMPTR0 0000
ALRMRPT ARPT7 ARPT6 ARPT5 ARPT4 ARPT3 ARPT2 ARPT1 ARPT0 0000
PIR3 SSP2IF BCL2IF RC2IF TX2IF TMR4IF CTMUIF TMR3GIF RTCCCIF 0000
PIE3 SSP2IE BCL2IE RC2IE TX2IE TMR4IE CTMUIE TMR3GIE RTCCCIE 0000
IPR3 SSP2IP BCL2IP RC2IP TX2IP TMR4IP CTMUIP TMR3GIP RTCCCIP 0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal for 44-pin devices.
TABLE 17-6: RTCC VALUE REGISTERS
File Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All Resets
RTCVALH RTCC Value Register Window High Byte, Based on RTCPTR<1:0> xxxx
RTCVALL RTCC Value Register Window Low Byte, Based on RTCPTR<1:0> xxxx
RTCCFG RTCEN — RTCWREN RTCSYNC HALFSEC RTCOE RTCPTR1 RTCPTR0 0000
ALRMCFG ALRMEN CHIME AMASK3 AMASK2 AMASK1 AMASK0 ALRMPTR1 ALRMPTR0 0000
ALRMVALH Alarm Value Register Window High Byte, Based on ALRMPTR<1:0> xxxx
ALRMVALL Alarm Value Register Window Low Byte, Based on ALRMPTR<1:0> xxxx
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal for 44-pin devices.
TABLE 17-7: ALARM VALUE REGISTERS
File Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 B it 1 Bit 0 All
Resets
ALRMRPT ARPT7 ARPT6 ARPT5 ARPT4 ARPT3 ARPT2 ARPT1 ARPT0 0000
ALRMVALH Alarm Value Register Window High Byte, Based on ALRMPTR<1:0> xxxx
ALRMVALL Alarm Value Register Window Low Byte, Based on ALRMPTR<1:0> xxxx
RTCCAL CAL7 CAL6 CAL5 CAL4 CAL3 CAL2 CAL1 CAL0 0000
RTCVALH RTCC Value Register Window High Byte, Based on RTCPTR<1:0> xxxx
RTCVALL RTCC Value Register Window Low Byte, Based on RTCPTR<1:0> xxxx
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal for 44-pin devices.
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NOTES:
2010 Microchip Technology Inc. Preliminary DS39974A-page 257
PIC18F47J13 FAMILY
18.0 CAPTURE/COMP ARE/PWM
(CCP) MODULES
PIC18F47J13 family devices have seven CCP
(Capture/Compare/PWM) modules, designated CCP4
through CCP10. All the modules implement standard
Capture, Compare and Pulse-Width Modulation (PWM)
modes.
Each CCP module contains a 16-bit register that can
operate as a 16-bit Capture register, a 16-bit Compare
register or a PWM Master/Slave Duty Cycle register.
For the sake of clarity, all CCP module operation in the
following sections is described with respect to CCP4,
but is equally applicable to CCP5 through CCP10.
Note: Throughout this section, generic references
are used for register and bit names that are
the same – except for an ‘x’ variable that
indicates the item’s association with the
specific CCP module. For example, the con-
trol register is named CCPxCON and refers
to CCP4CON through CCP10CON.
REGISTER 18-1: CCPxCON: CCP4-10 CONTROL REGISTER (4, BANKED F12h; 5, F0Fh; 6, F0Ch;
7, F09h; 8, F06h; 9, F03h; 10, F00h)
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— DCxB1 DCxB0 CCPxM3(1) CCPxM2(1) CCPxM1(1) CCPxM0(1)
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-6 Unimplemented: Read as ‘0’
bit 5-4 DCxB<1:0>: PWM Duty Cycle Bit 1 and Bit 0 for CCPx Module
Capture mode:
Unused.
Compare mode:
Unused.
PWM mode:
These bits are the two Least Significant bits (Bit 1 and Bit 0) of the 10-bit PWM duty cycle. The eight Most
Significant bits (DCxB<9:2>) of the duty cycle are found in CCPRxL.
bit 3-0 CCPxM<3:0>: CCPx Module Mode Select bits(1)
0000 = Capture/Compare/PWM disabled (resets CCPx module)
0001 = Reserved
0010 = Compare mode, toggle output on match (CCPxIF bit is set)
0011 = Reserved
0100 = Capture mode: every falling edge
0101 = Capture mode: every rising edge
0110 = Capture mode: every 4th rising edge
0111 = Capture mode: every 16th rising edge
1000 = Compare mode: initialize CCPx pin low; on compare match, force CCPx pin high (CCPxIF bit is set)
1001 = Compare mode: initialize CCPx pin high; on compare match, force CCPx pin low (CCPxIF bit is set)
1010 = Compare mode: generate software interrupt on compare match (CCPxIF bit is set, CCPx pin
reflects I/O state)
1011 = Compare mode: Special Event Trigger; reset timer on CCPx match (CCPxIF bit is set)
11xx =PWM mode
Note 1: CCPxM<3:0> = 1011 will only reset the timer and not start an A/D conversion on CCPx match.
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DS39974A-page 258 Preliminary 2010 Microchip Technology Inc.
REGISTER 18-2: CCPTMRS1: CCP4-10 TIMER SELECT 1 REGISTER (BANKED F51h)
R/W-0 R/W-0 U-0 R/W-0 U-0 R/W-0 R/W-0 R/W-0
C7TSEL1 C7TSEL0 — C6TSEL0 — C5TSEL0 C4TSEL1 C4TSEL0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-6 C7TSEL<1:0>: CCP7 Timer Selection bit
00 = CCP7 is based off of TMR1/TMR2
01 = CCP7 is based off of TMR5/TMR4
10 = CCP7 is based off of TMR5/TMR6
11 = CCP7 is based off of TMR5/TMR8
bit 5 Unimplemented: Read as ‘0’
bit 4 C6TSEL0: CCP6 Timer Selection bit
0 = CCP6 is based off of TMR1/TMR2
1 = CCP6 is based off of TMR5/TMR2
bit 3 Unimplemented: Read as ‘0’
bit 2 C5TSEL0: CCP5 Timer Selection bit
0 = CCP5 is based off of TMR1/TMR2
1 = CCP5 is based off of TMR5/TMR4
bit 1-0 C4TSEL<1:0>: CCP4 Timer Selection bits
00 = CCP4 is based off of TMR1/TMR2
01 = CCP4 is based off of TMR3/TMR4
10 = CCP4 is based off of TMR3/TMR6
11 = Reserved; do not use
2010 Microchip Technology Inc. Preliminary DS39974A-page 259
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REGISTER 18-3: CCPTMRS2: CCP4-10 TIMER SELECT 2 REGISTER (BANKED F50h)
U-0 U-0 U-0 R/W-0 U-0 R/W-0 R/W-0 R/W-0
— — — C10TSEL0 — C9TSEL0 C8TSEL1 C8TSEL0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 Unimplemented: Read as ‘0’
bit 4 C10TSEL0: CCP10 Timer Selection bit
0 = CCP10 is based off of TMR1/TMR2
1 = Reserved; do not use
bit 3 Unimplemented: Read as ‘0’
bit 2 C9TSEL0: CCP9 Timer Selection bit
0 = CCP9 is based off of TMR1/TMR2
1 = CCP9 is based off of TMR1/TMR4
bit 1-0 C8TSEL<1:0>: CCP8 Timer Selection bits
00 = CCP8 is based off of TMR1/TMR2
01 = CCP8 is based off of TMR1/TMR4
10 = CCP8 is based off of TMR1/TMR6
11 = Reserved; do not use
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DS39974A-page 260 Preliminary 2010 Microchip Technology Inc.
REGISTER 18-4: CCPRxL: CCP4-10 PERIOD LOW BYTE REGISTER (4, BANKED F13h; 5, F10h;
6, F0Dh; 7, F0Ah; 8, F07h; 9, F04h; 10, F01h)
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
CCPRxL7 CCPRxL6 CCPRxL5 CCPRxL4 CCPRxL3 CCPRxL2 CCPRxL1 CCPRxL0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-0 CCPRxL<7:0>: CCPx Period Register Low Byte bits
Capture Mode: Capture register low byte
Compare Mode: Compare register low byte
PWM Mode: PWM Period register low byte
REGISTER 18-5: CCPRxH: CCP4-10 PERIOD HIGH BYTE REGISTER (4, BANKED F14h; 5, F11h;
6, F0Eh; 7, F0Bh; 8, F08h; 9, F05h; 10, F02h)
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
CCPRxH7 CCPRxH6 CCPRxH5 CCPRxH4 CCPRxH3 CCPRxH2 CCPRxH1 CCPRxH0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-0 CCPRxH<7:0>: CCPx Period Register High Byte bits
Capture Mode: Capture register high byte
Compare Mode: Compare register high byte
PWM Mode: PWM Period register high byte
2010 Microchip Technology Inc. Preliminary DS39974A-page 261
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18.1 CCP Module Configuration
Each Capture/Compare/PWM module is associated
with a control register (generically, CCPxCON) and a
data register (CCPRx). The data register, in turn, is
comprised of two 8-bit registers: CCPRxL (low byte)
and CCPRxH (high byte). All registers are both
readable and writable.
18.1.1 CCP MODULES AND TIMER
RESOURCES
The CCP modules utilize Timers, 1 through 8, varying
with the selected mode. Various timers are available to
the CCP modules in Capture, Compare or PWM
modes, as shown in Table 18-1.
TABLE 18-1: CCP MODE – TIMER
RESOURCE
The assignment of a particular timer to a module is
determined by the Timer to CCP enable bits in the
CCPTMRSx registers. (See Register 18-2 and
Register 18-3.) All of the modules may be active at
once and may share the same timer resource if they
are configured to operate in the same mode
(Capture/Compare or PWM), at the same time.
The CCPTMRS1 register selects the timers for CCP
modules, 7, 6, 5 and 4, and the CCPTMRS2 register
selects the timers for CCP modules, 10, 9 and 8. The
possible configurations are shown in Table 18-2 and
Table 18-3.
TABLE 18-2: TIMER ASSIGNMENTS FOR CCP MODULES 4, 5, 6 AND 7
TABLE 18-3: TIMER ASSIGNMENTS FOR CCP MODULES 8, 9 AND 10
CCP Mode Timer Resource
Capture Timer1, Timer3 or Timer5
Compare
PWM Timer2, Timer4, Timer6 or Timer8
CCPTMRS1 Register
CCP4 CCP5 CCP6 CCP7
C4TSEL
<1:0>
Capture/
Compare
Mode
PWM
Mode C5TSEL0 Capture/
Compare
Mode
PWM
Mode C6TSEL0 Capture/
Compare
Mode
PWM
Mode C7TSEL
<1:0>
Capture/
Compare
Mode
PWM
Mode
00 TMR1 TMR2 0TMR1 TMR2 0TMR1 TMR2 00 TMR1 TMR2
01 TMR3 TMR4 1TMR5 TMR4 1TMR5 TMR2 01 TMR5 TMR4
10 TMR3 TMR6 10 TMR5 TMR6
11 Reserved(1) 11 TMR5 TMR8
Note 1: Do not use the reserved bit configuration.
CCPTMRS2 Register
CCP8 CCP8
Devices w ith 64 Kbyte CCP9 CCP10
C8TSEL
<1:0>
Capture/
Compare
Mode
PWM
Mode C8TSEL
<1:0>
Capture/
Compare
Mode
PWM
Mode C9TSEL0 Capture/
Compare
Mode
PWM
Mode C10TSEL0 Capture/
Compare
Mode
PWM
Mode
00 TMR1 TMR2 00 TMR1 TMR2 0TMR1 TMR2 0TMR1 TMR2
01 TMR1 TMR4 01 TMR1 TMR4 1TMR1 TMR4 1Reserved(1)
10 TMR1 TMR6 10 TMR1 TMR6
11 Reserved(1) 11 Reserved(1)
Note 1: Do not use the reserved bit configuration.
PIC18F47J13 FAMILY
DS39974A-page 262 Preliminary 2010 Microchip Technology Inc.
18.1.2 OPEN-DRAIN OUTPUT OPTION
When operating in Output mode (the Compare or PWM
modes), the drivers for the CCPx pins can be optionally
configured as open-drain outputs. This feature allows
the voltage level on the pin to be pulled to a higher level
through an external pull-up resistor and allows the
output to communicate with external circuits without the
need for additional level shifters.
The open-drain output option is controlled by the
CCPxOD bits (ODCON1<7:0> and ODCON2<3:2>).
Setting the appropriate bit configures the pin for the
corresponding module for open-drain operation.
18.2 Capture Mode
In Capture mode, the CCPR4H:CCPR4L register pair
captures the 16-bit value of the TMR1 or TMR3 register
when an event occurs on the CCP4 pin, RB4. An event
is defined as one of the following:
• Every falling edge
• Every rising edge
• Every 4th rising edge
• Every 16th rising edge
The event is selected by the mode select bits,
CCP4M<3:0> (CCP4CON<3:0>). When a capture is
made, the interrupt request flag bit, CCP4IF (PIR4<1>),
is set. (It must be cleared in software.) If another
capture occurs before the value in register, CCPR4, is
read, the old captured value is overwritten by the new
captured value.
Figure 18-1 shows the Capture mode block diagram.
18.2.1 CCP PIN CONFIGURATION
In Capture mode, the appropriate CCPx pin should be
configured as an input by setting the corresponding
TRISx direction bit.
18.2.2 TIMER1/3/5 MODE SELECTION
For the available timers (1/3/5) to be used for the capture
feature, the used timers must be running in Timer mode
or Synchronized Counter mode. In Asynchronous
Counter mode, the capture operation may not work.
The timer to be used with each CCP module is selected
in the CCPTMRSx registers. (See Sect io n 18.1.1 “C CP
Module s and Timer Reso ur c es”.)
Details of the timer assignments for the CCP modules
are given in Table 18-2 and Table 18-3.
FIGURE 18-1: CAPTURE MODE OPERATION BLOCK DIAGRAM
Note: If RB4 is configured as a CCP4 output, a
write to the port causes a capture condition.
CCPR5H CCPR5L
TMR1H TMR1L
Set CCP5IF
TMR5
Enable
Q1:Q4
CCP5CON<3:0>
CCP5 Pin
Prescaler
1, 4, 16
and
Edge Detect
TMR1
Enable
C5TSEL0
C5TSEL0
CCPR4H CCPR4L
TMR1H TMR1L
Set CCP4IF
TMR3
Enable
CCP4CON<3:0>
CCP4 Pin
Prescaler
1, 4, 16
TMR3H TMR3L
TMR1
Enable
C4TSEL0
C4TSEL1
C4TSEL0
C4TSEL1
TMR5H TMR5L
and
Edge Detect
4
4
4
Note: This block diagram uses CCP4 and CCP5, and their appropriate timers as an example. For details on all of
the CCP modules and their timer assignments, see Table 18-2 and Table 18-3.
2010 Microchip Technology Inc. Preliminary DS39974A-page 263
PIC18F47J13 FAMILY
18.2.3 SOFTWARE INTERRUPT
When the Capture mode is changed, a false capture
interrupt may be generated. The user should keep the
CCP4IE bit (PIE4<1>) clear to avoid false interrupts
and should clear the flag bit, CCP4IF, following any
such change in operating mode.
18.2.4 CCP PRESCALER
There are four prescaler settings in Capture mode.
They are specified as part of the operating mode
selected by the mode select bits (CCP4M<3:0>).
Whenever the CCP module is turned off, or the CCP
module is not in Capture mode, the prescaler counter
is cleared. This means that any Reset will clear the
prescaler counter.
Switching from one capture prescaler to another may
generate an interrupt. Doing that also will not clear the
prescaler counter – meaning the first capture may be
from a non-zero prescaler.
Example 18-1 shows the recommended method for
switching between capture prescalers. This example
also clears the prescaler counter and will not generate
the “false” interrupt.
EXAMPLE 18-1: CHANGING BETWEEN
CAPTURE PRESCALERS
18.3 Compar e Mode
In Compare mode, the 16-bit CCPR4 register value is
constantly compared against either the TMR1 or TMR3
register pair value. When a match occurs, the CCP4
pin can be:
• Driven high
•Driven low
• Toggled (high-to-low or low-to-high)
• Unchanged (that is, reflecting the state of the I/O
latch)
The action on the pin is based on the value of the mode
select bits (CCP4M<3:0>). At the same time, the
interrupt flag bit, CCP4IF, is set.
Figure 18-2 gives the Compare mode block diagram
18.3.1 CCP PIN CONFIGURATION
The user must configure the CCPx pin as an output by
clearing the appropriate TRISx bit.
18.3.2 TIMER1/3/5 MODE SELECTION
If the CCP module is using the compare feature in
conjunction with any of the Timer1/3/5 timers, the tim-
ers must be running in Timer mode or Synchronized
Counter mode. In Asynchronous Counter mode, the
compare operation may not work.
18.3.3 SOFTWARE INTERRUPT MODE
When the Generate Software Interrupt mode is chosen
(CCP4M<3:0> = 1010), the CCP4 pin is not affected.
Only a CCP interrupt is generated, if enabled, and the
CCP4IE bit is set.
18.3.4 SPECIAL EVENT TRIGGER
Both CCP modules are equipped with a Special Event
Trigger. This is an internal hardware signal generated
in Compare mode to trigger actions by other modules.
The Special Event Trigger is enabled by selecting
the Compare Special Event Trigger mode
(CCP4M<3:0> = 1011).
For either CCP module, the Special Event Trigger resets
the Timer register pair for whichever timer resource is
currently assigned as the module’s time base. This
allows the CCPRx registers to serve as a programmable
period register for either timer.
The Special Event Trigger for CCP4 cannot start an
A/D conversion.
CLRF CCP4CON ; Turn CCP module off
MOVLW NEW_CAPT_PS ; Load WREG with the
; new prescaler mode
; value and CCP ON
MOVWF CCP4CON ; Load CCP4CON with
; this value
Note: Clearing the CCP4CON register will force
the RB4 compare output latch (depending
on device configuration) to the default low
level. This is not the PORTB I/O data latch.
Note: Details of the timer assignments for the
CCP modules are given in Table 18-2 and
Table 18-3.
Note: The Special Event Trigger of ECCP1 can
start an A/D conversion, but the A/D
Converter must be enabled. For more
information, see Section 19.0 “Enhanced
Capture/Compare/PWM (ECCP) Module”.
PIC18F47J13 FAMILY
DS39974A-page 264 Preliminary 2010 Microchip Technology Inc.
FIGU RE 18-2: COM PARE MOD E OP ER AT I ON BL OCK D IA G RA M
CCPR5H CCPR5L
TMR1H TMR1L
Comparator QS
R
Output
Logic
Special Event Trigger
Set CCP5IF
CCP5 Pin
TRIS
CCP5CON<3:0>
Output Enable
TMR5H TMR5L 1
0
Compare
4
(Timer1/5 Reset)
Match
Note: This block diagram uses CCP4 and CCP5 and their appropriate timers as an example. For details on all of
the CCP modules and their timer assignments, see Table 18-2 and Table 18-3.
TMR1H TMR1L
TMR5H TMR5L
CCPR4H CCPR4L
Comparator
C4TSEL1
Set CCP4IF
1
0
QS
R
Output
Logic
Special Event Trigger
CCP4 Pin
TRIS
CCP4CON<3:0>
Output Enable
4
(Timer1/Timer3 Reset, A/D Trigger)
Compare
Match
C5TSEL0
C4TSEL0
2010 Microchip Technology Inc. Preliminary DS39974A-page 265
PIC18F47J13 FAMILY
TABLE 18-4: REGISTERS ASSOCIATED WITH CAPTURE, COMPARE, TIMER1/3/5/7
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF
RCON IPEN —CM RI TO PD POR BOR
PIR4 CCP10IF CCP9IF CCP8IF CCP7IF CCP6IF CCP5IF CCP4IF CCP3IF
PIE4 CCP10IE CCP9IE CCP8IE CCP7IE CCP6IE CCP5IE CCP4IE CCP3IE
IPR4 CCP10IP CCP9IP CCP8IP CCP7IP CCP6IP CCP5IP CCP4IP CCP3IP
TRISB TRISB7 TRISB6 TRISB5 TRISB4 TRISB3 TRISB2 TRISB1 TRISB0
TRISC TRISC7 TRISC6 TRISC5 TRISC4 TRISC3 TRISC2 TRISC1 TRISC0
TRISE RDPU REPU — — — TRISE2 TRISE1 TRISE0
TMR1L Timer1 Register Low Byte
TMR1H Timer1 Register High Byte
TMR3L Timer3 Register Low Byte
TMR3H Timer3 Register High Byte
TMR5L Timer5 Register Low Byte
TMR5H Timer5 Register High Byte
T1CON TMR1CS1 TMR1CS0 T1CKPS1 T1CKPS0 T1OSCEN T1SYNC RD16 TMR1ON
T3CON TMR3CS1 TMR3CS0 T3CKPS1 T3CKPS0 T3OSCEN T3SYNC RD16 TMR3ON
T5CON TMR5CS1 TMR5CS0 T5CKPS1 T5CKPS0 T5OSCEN T5SYNC RD16 TMR5ON
CCPR4L CCPR4L7 CCPR4L6 CCPR4L5 CCPR4L4 CCPR4L3 CCPR4L2 CCPR4L1 CCPR4L0
CCPR4H CCPR4H7 CCPR4H6 CCPR4H5 CCPR4H4 CCPR4H3 CCPR4H2 CCPR4H1 CCPR4H0
CCPR5L CCPR5L7 CCPR5L6 CCPR5L5 CCPR5L4 CCPR5L3 CCPR5L2 CCPR5L1 CCPR5L0
CCPR5H CCPR5H7 CCPR5H6 CCPR5H5 CCPR5H4 CCPR5H3 CCPR5H2 CCPR5H1 CCPR5H0
CCPR6L CCPR6L7 CCPR6L6 CCPR6L5 CCPR6L4 CCPR6L3 CCPR6L2 CCPR6L1 CCPR6L0
CCPR6H CCPR6H7 CCPR6H6 CCPR6H5 CCPR6H4 CCPR6H3 CCPR6H2 CCPR6H1 CCPR6H0
CCPR7L CCPR7L7 CCPR7L6 CCPR7L5 CCPR7L4 CCPR7L3 CCPR7L2 CCPR7L1 CCPR7L0
CCPR7H CCPR7H7 CCPR7H6 CCPR7H5 CCPR7H4 CCPR7H3 CCPR7H2 CCPR7H1 CCPR7H0
CCPR8L CCPR8L7 CCPR8L6 CCPR8L5 CCPR8L4 CCPR8L3 CCPR8L2 CCPR8L1 CCPR8L0
CCPR8H CCPR8H7 CCPR8H6 CCPR8H5 CCPR8H4 CCPR8H3 CCPR8H2 CCPR8H1 CCPR8H0
CCPR9L CCPR9L7 CCPR9L6 CCPR9L5 CCPR9L4 CCPR9L3 CCPR9L2 CCPR9L1 CCPR9L0
CCPR9H CCPR9H7 CCPR9H6 CCPR9H5 CCPR9H4 CCPR9H3 CCPR9H2 CCPR9H1 CCPR9H0
CCPR10L CCPR10L7 CCPR10L6 CCPR10L5 CCPR10L4 CCPR10L3 CCPR10L2 CCPR10L1 CCPR10L0
CCPR10H CCPR10H7 CCPR10H6 CCPR10H5 CCPR10H4 CCPR10H3 CCPR10H2 CCPR10H1 CCPR10H0
CCP4CON —— DC4B1 DC4B0 CCP4M3 CCP4M2 CCP4M1 CCP4M0
CCP5CON —— DC5B1 DC5B0 CCP5M3 CCP5M2 CCP5M1 CCP5M0
CCP6CON —— DC6B1 DC6B0 CCP6M3 CCP6M2 CCP6M1 CCP6M0
CCP7CON —— DC7B1 DC7B0 CCP7M3 CCP7M2 CCP7M1 CCP7M0
CCP8CON —— DC8B1 DC8B0 CCP8M3 CCP8M2 CCP8M1 CCP8M0
CCP9CON —— DC9B1 DC9B0 CCP9M3 CCP9M2 CCP9M1 CCP9M0
CCP10CON —— DC10B1 DC10B0 CCP10M3 CCP10M2 CCP10M1 CCP10M0
CCPTMRS1 C7TSEL1 C7TSEL0 — C6TSEL0 — C5TSEL0 C4TSEL1 C4TSEL0
CCPTMRS2 — — — C10TSEL0 — C9TSEL0 C8TSEL1 C8TSEL0
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used by capture/compare or Timer1/3/5.
PIC18F47J13 FAMILY
DS39974A-page 266 Preliminary 2010 Microchip Technology Inc.
18.4 PWM Mode
In Pulse-Width Modulation (PWM) mode, the CCP4 pin
produces up to a 10-bit resolution PWM output. Since
the CCP4 pin is multiplexed with a PORTB data latch,
the appropriate TRISx bit must be cleared to make the
CCP4 pin an output.
Figure 18-3 shows a simplified block diagram of the
CCP1 module in PWM mode.
For a step-by-step procedure on how to set up the CCP
module for PWM operation, see Section 18.4.3
“Setup for PWM Operation”.
FIGU RE 18-3: SIMP LIFI ED PWM BL OC K
DIAGRAM(2)
A PWM output (Figure 18-4) has a time base (period)
and a time that the output stays high (duty cycle). The
frequency of the PWM is the inverse of the period
(1/period).
FIGURE 18-4: PWM OUTPUT
18.4.1 PWM PERIOD
The PWM period is specified by writing to the PR2
register. The PWM period can be calculated using the
following formula:
EQUATION 18-1:
PWM frequency is defined as 1/[PWM period].
When TMR2 is equal to PR2, the following three events
occur on the next increment cycle:
•TMR2 is cleared
• The CCP4 pin is set
(An exception: If the PWM duty cycle = 0%, the
CCP4 pin will not be set)
• The PWM duty cycle is latched from CCPR4L into
CCPR4H
CCPR4L
CCPR4H (Slave)
Comparator
TMR2
Comparator
PR2
(Note 1)
RQ
S
Duty Cycle Registers CCP4CON<5:4>
Clear Timer,
CCP1 pin and
latch D.C.
TRISC<2>
RC2
Note 1: The 8-bit TMR2 value is concatenated with the 2-bit
internal Q clock, or 2 bits of the prescaler, to create
the 10-bit time base.
2: CCP4 and its appropriate timers are used as an
example. For details on all of the CCP modules and
their timer assignments, see Table 18-2 and
Table 18-3.
Note: The Timer2 postscalers (see Section 14.0
“Timer2 Module”) are not used in the
determination of the PWM frequency. The
postscaler could be used to have a servo
update rate at a different frequency than
the PWM output.
Period
Duty Cycle
TMR2 = PR2
TMR2 = Duty Cycle
TMR2 = PR2
PWM Period = [(PR2) + 1] • 4 • TOSC •
(TMR2 Prescale Value)
2010 Microchip Technology Inc. Preliminary DS39974A-page 267
PIC18F47J13 FAMILY
18.4.2 PWM DUTY CYCLE
The PWM duty cycle is specified by writing to the
CCPR4L register and to the CCP4CON<5:4> bits. Up
to 10-bit resolution is available. The CCPR4L contains
the eight MSbs and the CCP4CON<5:4> contains the
two LSbs. This 10-bit value is represented by
CCPR4L:CCP4CON<5:4>. The following equation is
used to calculate the PWM duty cycle in time:
EQUATION 18-2:
CCPR4L and CCP4CON<5:4> can be written to at any
time, but the duty cycle value is not latched into
CCPR4H until after a match between PR2 and TMR2
occurs (that is, the period is complete). In PWM mode,
CCPR4H is a read-only register.
The CCPR4H register and a two-bit internal latch are
used to double-buffer the PWM duty cycle. This
double-buffering is essential for glitchless PWM
operation.
When the CCPR4H and two-bit latch match TMR2,
concatenated with an internal two-bit Q clock or two
bits of the TMR2 prescaler, the CCP4 pin is cleared.
The maximum PWM resolution (bits) for a given PWM
frequency is given by the equation:
EQUATION 18-3:
TABLE 18-5: EXAMPLE PWM FREQUENCIES AND RESOLUTIONS AT 40 MHz
18.4.3 SETUP FOR PWM OPERATION
To configure the CCP module for PWM operation:
1. Set the PWM period by writing to the PR2
register.
2. Set the PWM duty cycle by writing to the
CCPR4L register and CCP4CON<5:4> bits.
3. Make the CCP4 pin an output by clearing the
appropriate TRISx bit.
4. Set the TMR2 prescale value, then enable
Timer2 by writing to T2CON.
5. Configure the CCP4 module for PWM operation.
PWM Duty Cycle = (CCPR4L:CCP4CON<5:4>) •
TOSC • (TMR2 Prescale Value)
Note: If the PWM duty cycle value is longer than
the PWM period, the CCP4 pin will not be
cleared.
FOSC
FPWM
---------------


log
2log
----------------------------- b i t s=
PWM Resolution (max)
PWM Frequency 2.44 kHz 9.77 kHz 39.06 kHz 156.25 kHz 312.50 kHz 416.67 kHz
Timer Prescaler (1, 4, 16)1641111
PR2 Value FFh FFh FFh 3Fh 1Fh 17h
Maximum Resolution (bits) 10 10 10 8 7 6.58
PIC18F47J13 FAMILY
DS39974A-page 268 Preliminary 2010 Microchip Technology Inc.
TABLE 18-6: REGISTERS ASSOCIATED WITH PWM AND TIMERS
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF
RCON IPEN —CM RI TO PD POR BOR
PIR4 CCP10IF CCP9IF CCP8IF CCP7IF CCP6IF CCP5IF CCP4IF CCP3IF
PIE4 CCP10IE CCP9IE CCP8IE CCP7IE CCP6IE CCP5IE CCP4IE CCP3IE
IPR4 CCP10IP CCP9IP CCP8IP CCP7IP CCP6IP CCP5IP CCP4IP CCP3IP
TRISB TRISB7 TRISB6 TRISB5 TRISB4 TRISB3 TRISB2 TRISB1 TRISB0
TRISC TRISC7 TRISC6 TRISC5 TRISC4 TRISC3 TRISC2 TRISC1 TRISC0
TRISE RDPU REPU — — — TRISE2 TRISE1 TRISE0
TMR2 Timer2 Register
TMR4 Timer4 Register
TMR6 Timer6 Register
TMR8 Timer8 Register
PR2 Timer2 Period Register
PR4 Timer4 Period Register
PR6 Timer6 Period Register
PR8 Timer8 Period Register
T2CON — T2OUTPS3 T2OUTPS2 T2OUTPS1 T2OUTPS0 TMR2ON T2CKPS1 T2CKPS0
T4CON — T4OUTPS3 T4OUTPS2 T4OUTPS1 T4OUTPS0 TMR4ON T4CKPS1 T4CKPS0
T6CON — T6OUTPS3 T6OUTPS2 T6OUTPS1 T6OUTPS0 TMR6ON T6CKPS1 T6CKPS0
T8CON — T8OUTPS3 T8OUTPS2 T8OUTPS1 T8OUTPS0 TMR8ON T8CKPS1 T8CKPS0
CCPR4L CCPR4L7 CCPR4L6 CCPR4L5 CCPR4L4 CCPR4L3 CCPR4L2 CCPR4L1 CCPR4L0
CCPR4H CCPR4H7 CCPR4H6 CCPR4H5 CCPR4H4 CCPR4H3 CCPR4H2 CCPR4H1 CCPR4H0
CCPR5L CCPR5L7 CCPR5L6 CCPR5L5 CCPR5L4 CCPR5L3 CCPR5L2 CCPR5L1 CCPR5L0
CCPR5H CCPR5H7 CCPR5H6 CCPR5H5 CCPR5H4 CCPR5H3 CCPR5H2 CCPR5H1 CCPR5H0
CCPR6L CCPR6L7 CCPR6L6 CCPR6L5 CCPR6L4 CCPR6L3 CCPR6L2 CCPR6L1 CCPR6L0
CCPR6H CCPR6H7 CCPR6H6 CCPR6H5 CCPR6H4 CCPR6H3 CCPR6H2 CCPR6H1 CCPR6H0
CCPR7L CCPR7L7 CCPR7L6 CCPR7L5 CCPR7L4 CCPR7L3 CCPR7L2 CCPR7L1 CCPR7L0
CCPR7H CCPR7H7 CCPR7H6 CCPR7H5 CCPR7H4 CCPR7H3 CCPR7H2 CCPR7H1 CCPR7H0
CCPR8L CCPR8L7 CCPR8L6 CCPR8L5 CCPR8L4 CCPR8L3 CCPR8L2 CCPR8L1 CCPR8L0
CCPR8H CCPR8H7 CCPR8H6 CCPR8H5 CCPR8H4 CCPR8H3 CCPR8H2 CCPR8H1 CCPR8H0
CCPR9L CCPR9L7 CCPR9L6 CCPR9L5 CCPR9L4 CCPR9L3 CCPR9L2 CCPR9L1 CCPR9L0
CCPR9H CCPR9H7 CCPR9H6 CCPR9H5 CCPR9H4 CCPR9H3 CCPR9H2 CCPR9H1 CCPR9H0
CCPR10L CCPR10L7 CCPR10L6 CCPR10L5 CCPR10L4 CCPR10L3 CCPR10L2 CCPR10L1 CCPR10L0
CCPR10H CCPR10H7 CCPR10H6 CCPR10H5 CCPR10H4 CCPR10H3 CCPR10H2 CCPR10H1 CCPR10H0
CCP4CON —— DC4B1 DC4B0 CCP4M3 CCP4M2 CCP4M1 CCP4M0
CCP5CON —— DC5B1 DC5B0 CCP5M3 CCP5M2 CCP5M1 CCP5M0
CCP6CON —— DC6B1 DC6B0 CCP6M3 CCP6M2 CCP6M1 CCP6M0
CCP7CON —— DC7B1 DC7B0 CCP7M3 CCP7M2 CCP7M1 CCP7M0
CCP8CON —— DC8B1 DC8B0 CCP8M3 CCP8M2 CCP8M1 CCP8M0
CCP9CON —— DC9B1 DC9B0 CCP9M3 CCP9M2 CCP9M1 CCP9M0
CCP10CON —— DC10B1 DC10B0 CCP10M3 CCP10M2 CCP10M1 CCP10M0
CCPTMRS1 C7TSEL1 C7TSEL0 — C6TSEL0 — C5TSEL0 C4TSEL1 C4TSEL0
CCPTMRS2 — — — C10TSEL0 — C9TSEL0 C8TSEL1 C8TSEL0
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used by PWM or Timer2/4/6/8.
2010 Microchip Technology Inc. Preliminary DS39974A-page 269
PIC18F47J13 FAMILY
19.0 ENHANCED
CAPTURE/COMPARE/PWM
(ECCP) MODULE
PIC18F47J13 family devices have three Enhanced
Capture/Compare/PWM (ECCP) modules: ECCP1,
ECCP2 and ECCP3. These modules contain a 16-bit
register, which can operate as a 16-bit Capture register,
a 16-bit Compare register or a PWM Master/Slave Duty
Cycle register. These ECCP modules are upwardly
compatible with CCP.
The ECCP modules are implemented as standard CCP
modules with enhanced PWM capabilities. These
include:
• Provision for two or four output channels
• Output Steering modes
• Programmable polarity
• Programmable dead-band control
• Automatic shutdown and restart
The enhanced features are discussed in detail in
Section 19.4 “PWM (Enhanced Mode)”.
Note: Throughout this section, generic references
are used for register and bit names that are
the same – except for an ‘x’ variable that
indicates the item’s association with the
ECCP1, ECCP2 or ECCP3 module. For
example, the control register is named
CCPxCON and refers to CCP1CON,
CCP2CON and CCP3CON.
PIC18F47J13 FAMILY
DS39974A-page 270 Preliminary 2010 Microchip Technology Inc.
REGISTER 19-1: CCPxCON: ECCP1/2/3 CONTROL (1, ACCESS FBAh; 2, FB4h; 3, BANKED F15h)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
PxM1 PxM0 DCxB1 DCxB0 CCPxM3 CCPxM2 CCPxM1 CCPxM0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-6 PxM<1:0>: Enhanced PWM Output Configuration bits
If CCPxM<3:2> = 00, 01, 10:
xx = PxA assigned as capture/compare input/output; PxB, PxC and PxD assigned as port pins
If CCPxM<3:2> = 11:
00 = Single output: PxA, PxB, PxC and PxD are controlled by steering (see Section 19.4.7 “Pulse
Steering Mode”)
01 = Full-bridge output forward: PxD modulated; PxA active; PxB, PxC inactive
10 = Half-bridge output: PxA, PxB modulated with dead-band control; PxC and PxD assigned as
port pins
11 = Full-bridge output reverse: PxB modulated; PxC active; PxA and PxD inactive
bit 5-4 DCxB<1:0>: PWM Duty Cycle Bit 1 and Bit 0
Capture mode:
Unused.
Compare mode:
Unused.
PWM mode:
These bits are the two LSbs of the 10-bit PWM duty cycle. The eight MSbs of the duty cycle are found
in ECCPRxL.
bit 3-0 CCPxM<3:0>: ECCPx Mode Select bits
0000 = Capture/Compare/PWM off (resets ECCPx module)
0001 = Reserved
0010 = Compare mode; toggle output on match
0011 = Capture mode
0100 = Capture mode; every falling edge
0101 = Capture mode; every rising edge
0110 = Capture mode; every fourth rising edge
0111 = Capture mode; every 16th rising edge
1000 = Compare mode; initialize ECCPx pin low, set output on compare match (set CCPxIF)
1001 = Compare mode; initialize ECCPx pin high, clear output on compare match (set CCPxIF)
1010 = Compare mode; generate software interrupt only, ECCPx pin reverts to I/O state
1011 = Compare mode; trigger special event (ECCPx resets TMR1 or TMR3, starts A/D conversion,
sets CCPxIF bit)
1100 = PWM mode; PxA and PxC active-high; PxB and PxD active-high
1101 = PWM mode; PxA and PxC active-high; PxB and PxD active-low
1110 = PWM mode; PxA and PxC active-low; PxB and PxD active-high
1111 = PWM mode; PxA and PxC active-low; PxB and PxD active-low
2010 Microchip Technology Inc. Preliminary DS39974A-page 271
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In addition to the expanded range of modes available
through the CCPxCON and ECCPxAS registers, the
ECCP modules have two additional registers associated
with Enhanced PWM operation and auto-shutdown
features. They are:
• ECCPxDEL – Enhanced PWM Control
• PSTRxCON – Pulse Steering Control
REGISTER 19-2: CCPTMRS0: ECCP1/2/3 TIMER SELECT 0 REGISTER (BANKED F52h)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
C3TSEL1 C3TSEL0 C2TSEL2 C2TSEL1 C2TSEL0 C1TSEL2 C1TSEL1 C1TSEL0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-6 C3TSEL<1:0>: ECCP3 Timer Selection bits
00 = ECCP3 is based off of TMR1/TMR2
01 = ECCP3 is based off of TMR3/TMR4
10 = ECCP3 is based off of TMR3/TMR6
11 = ECCP3 is based off of TMR3/TMR8
bit 5-3 C2TSEL<2:0>: ECCP2 Timer Selection bits
000 = ECCP2 is based off of TMR1/TMR2
001 = ECCP2 is based off of TMR3/TMR4
010 = ECCP2 is based off of TMR3/TMR6
011 = ECCP2 is based off of TMR3/TMR8
1xx = Reserved; do not use
bit 2-0 C1TSEL<2:0>: ECCP1 Timer Selection bits
000 = ECCP1 is based off of TMR1/TMR2
001 = ECCP1 is based off of TMR3/TMR4
010 = ECCP1 is based off of TMR3/TMR6
011 = ECCP1 is based off of TMR3/TMR8
1xx = Reserved; do not use
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DS39974A-page 272 Preliminary 2010 Microchip Technology Inc.
19.1 ECCP Outputs and Configuration
The Enhanced CCP module may have up to four PWM
outputs, depending on the selected operating mode.
These outputs, designated PxA through PxD, are
routed through the Peripheral Pin Select (PPS)
module. Therefore, individual functions can be mapped
to any of the remappable I/O pins (RPn).
The outputs that are active depend on the ECCP
operating mode selected. The pin assignments are
summarized in Table 19-3.
To configure the I/O pins as PWM outputs, the proper
PWM mode must be selected by setting the PxM<1:0>
and CCPxM<3:0> bits. The appropriate TRIS direction
bits for the port pins must also be set as outputs.
19.1.1 ECCP MODULE AND TIMER
RESOURCES
The ECCP modules use Timer1, 2, 3, 4, 6 or 8, depend-
ing on the mode selected. These timers are available to
CCP modules in Capture, Compare or PWM modes, as
shown in Table 19-1.
TABLE 19-1: ECCP MODE – TIMER
RESOURCE
The assignment of a particular timer to a module is
determined by the Timer to ECCP enable bits in the
CCPTMRS0 register (Register 19-2). The interactions
between the two modules are depicted in Figure 19-1.
Capture operations are designed to be used when the
timer is configured for Synchronous Counter mode.
Capture operations may not work as expected if the
associated timer is configured for Asynchronous Counter
mode.
19.2 Capture Mode
In Capture mode, the CCPRxH:CCPRxL register pair
captures the 16-bit value of the TMR1 or TMR3
registers when an event occurs on the corresponding
ECCPx pin. An event is defined as one of the following:
• Every falling edge
• Every rising edge
• Every fourth rising edge
•Every 16
th rising edge
The event is selected by the mode select bits,
CCPxM<3:0> (CCPxCON register<3:0>). When a
capture is made, the interrupt request flag bit, CCPxIF,
is set (see Table 19-2). The flag must be cleared by
software. If another capture occurs before the value in
the CCPRxH/L register pair is read, the old captured
value is overwritten by the new captured value.
19.2.1 ECCP PIN CONFIGURATION
In Capture mode, the appropriate ECCPx pin should be
configured as an input by setting the corresponding
TRISx direction bit.
Additionally, the ECCPx input function needs to be
assigned to an I/O pin through the Peripheral Pin
Select module. For details on setting up the
remappable pins, see Section 10.7 “Peripheral Pin
Select (PPS)”.
ECCP Mode Timer Resource
Capture Timer1 or Timer3
Compare Timer1 or Timer3
PWM Timer2, Timer4, Timer6 or Timer8
TABLE 19-2: ECCP1/2/3 INTERRUPT FLAG
BITS
ECCP Module Flag-Bit
1 PIR1<2>
2 PIR2<0>
3 PIR4<0>
Note: If the ECCPx pin is configured as an out-
put, a write to the port can cause a capture
condition.
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19.2.2 TIMER1/TIMER3 MODE SELECTION
The timers that are to be used with the capture feature
(Timer1 and/or Timer3) must be running in Timer mode
or Synchronized Counter mode. In Asynchronous
Counter mode, the capture operation may not work.
The timer to be used with each ECCP module is
selected in the CCPTMRS0 register (Register 19-2).
19.2.3 SOFTWARE INTERRUPT
When the Capture mode is changed, a false capture
interrupt may be generated. The user should keep the
CCPxIE interrupt enable bit clear to avoid false interrupts.
The interrupt flag bit, CCPxIF, should also be cleared
following any such change in operating mode.
19.2.4 ECCP PRESCALER
There are four prescaler settings in Capture mode; they
are specified as part of the operating mode selected by
the mode select bits (CCPxM<3:0>). Whenever the
ECCP module is turned off, or Capture mode is
disabled, the prescaler counter is cleared. This means
that any Reset will clear the prescaler counter.
Switching from one capture prescaler to another may
generate an interrupt. Also, the prescaler counter will
not be cleared; therefore, the first capture may be from
a non-zero prescaler. Example 19-1 provides the
recommended method for switching between capture
prescalers. This example also clears the prescaler
counter and will not generate the “false” interrupt.
EXAMPLE 19-1: CHANGING BETWEEN
CAPTURE PRESCALERS
FIGU RE 19-1: CAPT U RE MO DE O PER AT I ON BL O CK DI AG RA M
CLRF ECCP1CON ; Turn ECCP module off
MOVLW NEW_CAPT_PS ; Load WREG with the
; new prescaler mode
; value and ECCP ON
MOVWF CCP1CON ; Load ECCP1CON with
; this value
CCPR1H CCPR1L
TMR1H TMR1L
Set CCP1IF
TMR3
Enable
Q1:Q4
CCP1CON<3:0>
ECCP1 Pin
Prescaler
1, 4, 16
and
Edge Detect
TMR1
Enable
C1TSEL0
TMR3H TMR3L
4
4
C1TSEL1
C1TSEL2
C1TSEL0
C1TSEL1
C1TSEL2
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DS39974A-page 274 Preliminary 2010 Microchip Technology Inc.
19.3 Compar e Mode
In Compare mode, the 16-bit CCPRx register pair value
is constantly compared against either the TMR1 or
TMR3 register pair value. When a match occurs, the
ECCPx pin can be:
• Driven high
•Driven low
• Toggled (high-to-low or low-to-high)
• Unchanged (that is, reflecting the state of the I/O
latch)
The action on the pin is based on the value of the mode
select bits (CCPxM<3:0>). At the same time, the
interrupt flag bit, CCPxIF, is set.
19.3.1 ECCP PIN CONFIGURATION
Users must configure the ECCPx pin as an output by
clearing the appropriate TRISx bit.
19.3.2 TIMER1/TIMER3 MODE SELECTION
Timer1 and/or Timer3 must be running in Timer mode
or Synchronized Counter mode if the ECCP module is
using the compare feature. In Asynchronous Counter
mode, the compare operation will not work reliably.
19.3.3 SOFTWARE INTERRUPT MODE
When the Generate Software Interrupt mode is chosen
(CCPxM<3:0> = 1010), the ECCPx pin is not affected;
only the CCPxIF interrupt flag is affected.
19.3.4 SPECIAL EVENT TRIGGER
The ECCP module is equipped with a Special Event
Trigger. This is an internal hardware signal generated
in Compare mode to trigger actions by other modules.
The Special Event Trigger is enabled by selecting
the Compare Special Event Trigger mode
(CCPxM<3:0> = 1011).
The Special Event Trigger resets the Timer register pair
for whichever timer resource is currently assigned as the
module’s time base. This allows the CCPRx registers to
serve as a Programmable Period register for either
timer.
The Special Event Trigger can also start an A/D conver-
sion. In order to do this, the A/D Converter must
already be enabled.
FIGU RE 19-2: CO MPARE MOD E O PER AT I O N BL O CK DI AG RA M
Note: Clearing the CCPxCON register will force
the ECCPx compare output latch (depend-
ing on device configuration) to the default
low level. This is not the PORTx I/O data
latch.
TMR1H TMR1L
TMR3H TMR3L
CCPR1H CCPR1L
Comparator
Set CCP1IF
1
0
Q
S
R
Output
Logic
ECCP1 Pin
TRIS
CCP1CON<3:0>
Output Enable
4
(Timer1/Timer3 Reset, A/D Trigger)
Compare
Match
C1TSEL0
C1TSEL1
C1TSEL2
Special Event Trigger
2010 Microchip Technology Inc. Preliminary DS39974A-page 275
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19.4 PWM (Enhanced Mode)
The Enhanced PWM mode can generate a PWM signal
on up to four different output pins with up to 10 bits of
resolution. It can do this through four different PWM
Output modes:
• Single PWM mode
• Half-Bridge PWM mode
• Full-Bridge PWM, Forward mode
• Full-Bridge PWM, Reverse mode
To select an Enhanced PWM mode, the PxM bits of the
CCPxCON register must be set appropriately.
The PWM outputs are multiplexed with I/O pins and are
designated: PxA, PxB, PxC and PxD. The polarity of the
PWM pins is configurable and is selected by setting the
CCPxM bits in the CCPxCON register appropriately.
Table 19-1 provides the pin assignments for each
Enhanced PWM mode.
Figure 19-3 provides an example of a simplified block
diagram of the Enhanced PWM module.
FIGURE 19- 3: SIMP LIFIE D BLOC K DIAGRAM OF THE EN HANCED PWM MOD E EXAMPLE
Note: To prevent the generation of an
incomplete waveform when the PWM is
first enabled, the ECCP module waits until
the start of a new PWM period before
generating a PWM signal.
Note 1: The TRIS register value for each PWM output must be configured appropriately.
2: Any pin not used by an Enhanced PWM mode is available for alternate pin functions.
CCPR1L
CCPR1H (Slave)
Comparator
TMR2
Comparator
PR2
(1)
RQ
S
Duty Cycle Registers DC1B<1:0>
Clear Timer2,
Toggle PWM Pin and
Latch Duty Cycle
Note 1: The 8-bit timer, TMR2 register, is concatenated with the 2-bit internal Q clock, or 2 bits of the prescaler, to
create the 10-bit time base.
TRIS
ECCPx/Output Pi
n
TRIS
Output Pi
n
TRIS
Output Pi
n
TRIS
Output Pi
n
Output
Controller
PxM<1:0>
2
CCPxM<3:0>
4
ECCP1DEL
ECCPx/PxA
PxB
PxC
PxD
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DS39974A-page 276 Preliminary 2010 Microchip Technology Inc.
TABLE 19-3: EXAMPLE PIN ASSIGNMENTS FOR VARIOUS PWM ENHANCED MODES
FIGURE 19-4: PWM (ENHANCED MODE) OUTPUT RELATIONSHIPS
(ACTIVE-HIGH STATE) EXAMPLE
ECCP Mode PxM<1:0> PxA PxB PxC PxD
Single 00 Yes(1) Yes(1) Yes (1) Yes(1)
Half-Bridge 10 Yes Yes No No
Full-Bridge, Forward 01 Yes Yes Yes Yes
Full-Bridge, Reverse 11 Yes Yes Yes Yes
Note 1: Outputs are enabled by pulse steering in Single mode (see Register 19-5).
0
Period
00
10
01
11
Signal PR2 + 1
PxM<1:0>
PxA Modulated
PxA Modulated
PxB Modulated
PxA Active
PxB Inactive
PxC Inactive
PxD Modulated
PxA Inactive
PxB Modulated
PxC Active
PxD Inactive
Pulse Width
(Single Output)
(Half-Bridge)
(Full-Bridge,
Forward)
(Full-Bridge,
Reverse)
Delay(1) Delay(1)
Relationships:
• Period = 4 * T
OSC * (PR2 + 1) * (TMR2 Prescale Value)
• Pulse Width = TOSC * (CCPRxL<7:0>:CCPxCON<5:4>) * (TMR2 Prescale Value)
• Delay = 4 * TOSC * (ECCPxDEL<6:0>)
Note 1: Dead-band delay is programmed using the ECCPxDEL register (see Section 19.4.6 “Programmable
Dead-Band Delay Mode”).
2010 Microchip Technology Inc. Preliminary DS39974A-page 277
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FIGURE 19-5: ENHANCED PWM OUTPUT RELATIONSHIPS (ACTIVE-LOW ST ATE) EXAMPLE
0
Period
00
10
01
11
Signal PR2 + 1
PxM<1:0>
PxA Modulated
PxA Modulated
PxB Modulated
PxA Active
PxB Inactive
PxC Inactive
PxD Modulated
PxA Inactive
PxB Modulated
PxC Active
PxD Inactive
Pulse
Width
(Single Output)
(Half-Bridge)
(Full-Bridge,
Forward)
(Full-Bridge,
Reverse)
Delay(1) Delay(1)
Relationships:
• Period = 4 * T
OSC * (PR2 + 1) * (TMR2 Prescale Value)
• Pulse Width = TOSC * (CCPRxL<7:0>:CCPxCON<5:4>) * (TMR2 Prescale Value)
• Delay = 4 * TOSC * (ECCPxDEL<6:0>)
Note 1: Dead-band delay is programmed using the ECCPxDEL register (see Section 19.4.6 “Programmable Dead-Band
Delay Mode”).
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DS39974A-page 278 Preliminary 2010 Microchip Technology Inc.
19.4.1 HALF-BRIDGE MODE
In Half-Bridge mode, two pins are used as outputs to
drive push-pull loads. The PWM output signal is output
on the PxA pin, while the complementary PWM output
signal is output on the PxB pin (see Figure 19-6). This
mode can be used for half-bridge applications, as
shown in Figure 19-7, or for full-bridge applications,
where four power switches are being modulated with
two PWM signals.
In Half-Bridge mode, the programmable dead-band delay
can be used to prevent shoot-through current in
half-bridge power devices. The value of the PxDC<6:0>
bits of the ECCPxDEL register sets the number of
instruction cycles before the output is driven active. If the
value is greater than the duty cycle, the corresponding
output remains inactive during the entire cycle. For more
details on the dead-band delay operations, see
Section 19.4.6 “Programmable Dead-Band Delay
Mode”.
Since the PxA and PxB outputs are multiplexed with the
port data latches, the associated TRIS bits must be
cleared to configure PxA and PxB as outputs.
FIGURE 19-6: EXAMPLE OF
HALF-BRIDGE PWM
OUTPUT
FIGURE 19-7: EXAMPLE OF HALF-BRIDGE APPLICATIONS
Period
Pulse Width
td
td
(1)
PxA(2)
PxB(2)
td = Dead-Band Delay
Period
(1) (1)
Note 1: At this time, the TMR2 register is equal to the
PR2 register.
2: Output signals are shown as active-high.
PxA
PxB
FET
Driver
FET
Driver
Load
+
-
+
-
FET
Driver
FET
Driver
V+
Load
FET
Driver
FET
Driver
PxA
PxB
Standard Half-Bridge Circuit (“Push-Pull”)
Half-Bridge Output Driving a Full-Bridge Circuit
2010 Microchip Technology Inc. Preliminary DS39974A-page 279
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19.4.2 FULL-BRIDGE MODE
In Full-Bridge mode, all four pins are used as outputs.
An example of a full-bridge application is provided in
Figure 19-8.
In the Forward mode, the PxA pin is driven to its active
state and the PxD pin is modulated, while the PxB and
PxC pins are driven to their inactive state, as shown in
Figure 19-9.
In the Reverse mode, the PxC pin is driven to its active
state and the PxB pin is modulated, while the PxA and
PxD pins are driven to their inactive state, as shown in
Figure 19-9.
The PxA, PxB, PxC and PxD outputs are multiplexed
with the port data latches. The associated TRIS bits
must be cleared to configure the PxA, PxB, PxC and
PxD pins as outputs.
FIGURE 19-8: EXAMPLE OF FULL-BRIDGE APPLICATION
PxA
PxC
FET
Driver
FET
Driver
V+
V-
Load
FET
Driver
FET
Driver
PxB
PxD
QA
QB QD
QC
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DS39974A-page 280 Preliminary 2010 Microchip Technology Inc.
FIGURE 19-9: EXAMPLE OF FULL-BRIDGE PWM OUTPUT
Period
Pulse Width
PxA(2)
PxB(2)
PxC(2)
PxD(2)
Forw a r d M o de
(1)
Period
Pulse Width
PxA(2)
PxC(2)
PxD(2)
PxB(2)
Reverse Mode
(1)
(1)
(1)
Note 1: At this time, the TMR2 register is equal to the PR2 register.
2: The output signal is shown as active-high.
2010 Microchip Technology Inc. Preliminary DS39974A-page 281
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19.4.2.1 Direction Change in Full-Bridge
Mode
In the Full-Bridge mode, the PxM1 bit in the CCPxCON
register allows users to control the forward/reverse
direction. When the application firmware changes this
direction control bit, the module will change to the new
direction on the next PWM cycle.
A direction change is initiated in software by changing
the PxM1 bit of the CCPxCON register. The following
sequence occurs prior to the end of the current PWM
period:
• The modulated outputs (PxB and PxD) are placed
in their inactive state.
• The associated unmodulated outputs (PxA and
PxC) are switched to drive in the opposite direction.
• PWM modulation resumes at the beginning of the
next period.
For an illustration of this sequence, see Figure 19-10.
The Full-Bridge mode does not provide a dead-band
delay. As one output is modulated at a time, a dead-band
delay is generally not required. There is a situation where
a dead-band delay is required. This situation occurs
when both of the following conditions are true:
• The direction of the PWM output changes when
the duty cycle of the output is at or near 100%.
• The turn-off time of the power switch, including
the power device and driver circuit, is greater than
the turn-on time.
Figure 19-11 shows an example of the PWM direction
changing from forward to reverse at a near 100% duty
cycle. In this example, at time t1, the PxA and PxD
outputs become inactive, while the PxC output
becomes active. Since the turn-off time of the power
devices is longer than the turn-on time, a shoot-through
current will flow through power devices, QC and QD
(see Figure 19-8), for the duration of ‘t’. The same
phenomenon will occur to power devices, QA and QB,
for PWM direction change from reverse to forward.
If changing PWM direction at high duty cycle is required
for an application, two possible solutions for eliminating
the shoot-through current are:
• Reduce PWM duty cycle for one PWM period
before changing directions.
• Use switch drivers that can drive the switches off
faster than they can drive them on.
Other options to prevent shoot-through current may
exist.
FIGU RE 19 -10: EXAMPLE OF PWM DI RE CTION CHANGE
Pulse Width
Period(1)
Signal
Note 1: The direction bit, PxM1 of the CCPxCON register, is written any time during the PWM cycle.
2: When changing directions, the PxA and PxC signals switch before the end of the current PWM cycle. The
modulated PxB and PxD signals are inactive at this time. The length of this time is:
(1/FOSC) • TMR2 Prescale Value.
Period
(2)
PxA (Active-High)
PxB (Active-High)
PxC (Active-High)
PxD (Active-High)
Pulse Width
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DS39974A-page 282 Preliminary 2010 Microchip Technology Inc.
FIGU RE 19 -11: EXAMPL E OF PWM DI RE CTION CHANGE AT NEAR 10 0% DUT Y CYCLE
19.4.3 START-UP CONSIDERATIONS
When any PWM mode is used, the application
hardware must use the proper external pull-up and/or
pull-down resistors on the PWM output pins.
The CCPxM<1:0> bits of the CCPxCON register allow
the user to choose whether the PWM output signals are
active-high or active-low for each pair of PWM output
pins (PxA/PxC and PxB/PxD). The PWM output
polarities must be selected before the PWM pin output
drivers are enabled. Changing the polarity configura-
tion while the PWM pin output drivers are enabled is
not recommended, since it may result in damage to the
application circuits.
The PxA, PxB, PxC and PxD output latches may not be
in the proper states when the PWM module is
initialized. Enabling the PWM pin output drivers at the
same time as the Enhanced PWM modes may cause
damage to the application circuit. The Enhanced PWM
modes must be enabled in the proper Output mode and
complete a full PWM cycle before enabling the PWM
pin output drivers. The completion of a full PWM cycle
is indicated by the TMR2IF or TMR4IF bit of the PIR1
or PIR3 register being set as the second PWM period
begins.
19.4.4 ENHANCED PWM
AUTO-SHUTDOWN MODE
The PWM mode supports an Auto-Shutdown mode that
will disable the PWM outputs when an external
shutdown event occurs. Auto-Shutdown mode places
the PWM output pins into a predetermined state. This
mode is used to help prevent the PWM from damaging
the application.
The auto-shutdown sources are selected using the
ECCPxAS<2:0> bits (ECCPxAS<6:4>). A shutdown
event may be generated by:
• A logic ‘0’ on the pin that is assigned to the FLT0
input function
• Comparator C1
• Comparator C2
• Setting the ECCPxASE bit in firmware
A shutdown condition is indicated by the ECCPxASE
(Auto-Shutdown Event Status) bit (ECCPxAS<7>). If
the bit is a ‘0’, the PWM pins are operating normally. If
the bit is a ‘1’, the PWM outputs are in the shutdown
state.
Forward Period Reverse Period
PxA
TON
TOFF
T = TOFF – TON
PxB
PxC
PxD
External Switch D
Potential
Shoot-Through Current
Note 1: All signals are shown as active-high.
2: TON is the turn-on delay of power switch, QC, and its driver.
3: TOFF is the turn-off delay of power switch, QD, and its driver.
External Switch C
t1
PW
PW
Note: When the microcontroller is released from
Reset, all of the I/O pins are in the
high-impedance state. The external
circuits must keep the power switch
devices in the OFF state until the micro-
controller drives the I/O pins with the
proper signal levels or activates the PWM
output(s).
2010 Microchip Technology Inc. Preliminary DS39974A-page 283
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When a shutdown event occurs, two things happen:
• The ECCPxASE bit is set to ‘1’. The ECCPxASE
will remain set until cleared in firmware or an
auto-restart occurs. (See Section 19.4.5
“Auto-Restart Mode”.)
• The enabled PWM pins are asynchronously
placed in their shutdown states. The PWM output
pins are grouped into pairs (PxA/PxC and
PxB/PxD). The state of each pin pair is
determined by the PSSxAC and PSSxBD bits
(ECCPxAS<3:0>).
Each pin pair may be placed into one of three states:
• Drive logic ‘1’
• Drive logic ‘0’
• Tri-state (high-impedance)
REGISTER 19-3: ECCPxAS: ECCP1/2/3 AUTO-SHUTDOWN CONTROL REGISTER
(1, ACCESS FBEh; 2, FB8h; 3, BANKED F19h)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
ECCPxASE ECCPxAS2 ECCPxAS1 ECCPxAS0 PSSxAC1 PSSxAC0 PSSxBD1 PSSxBD0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 ECCPxASE: ECCP Auto-Shutdown Event Status bit
1 = A shutdown event has occurred; ECCP outputs are in a shutdown state
0 = ECCP outputs are operating
bit 6-4 ECCPxAS<2:0>: ECCP Auto-Shutdown Source Select bits
000 = Auto-shutdown is disabled
001 = Comparator, C1OUT, output is high
010 = Comparator, C2OUT, output is high
011 = Either comparator, C1OUT or C2OUT, is high
100 =V
IL on FLT0 pin
101 =V
IL on FLT0 pin or comparator, C1OUT, output is high
110 =V
IL on FLT0 pin or comparator, C2OUT, output is high
111 =V
IL on FLT0 pin or comparator, C1OUT, or comparator, C2OUT, is high
bit 3-2 PSSxAC<1:0>: PxA and PxC Pins Shutdown State Control bits
00 = Drive pins, PxA and PxC, to ‘0’
01 = Drive pins, PxA and PxC, to ‘1’
1x = PxA and PxC pins tri-state
bit 1-0 PSSxBD<1:0>: PxB and PxD Pins Shutdown State Control bits
00 = Drive pins, PxB and PxD, to ‘0’
01 = Drive pins, PxB and PxD, to ‘1’
1x = PxB and PxD pins tri-state
Note 1: The auto-shutdown condition is a level-based signal, not an edge-based signal. As long as the level is
present, the auto-shutdown will persist.
2: Writing to the ECCPxASE bit is disabled while an auto-shutdown condition persists.
3: Once the auto-shutdown condition has been removed and the PWM restarted (either through firmware or
auto-restart), the PWM signal will always restart at the beginning of the next PWM period.
PIC18F47J13 FAMILY
DS39974A-page 284 Preliminary 2010 Microchip Technology Inc.
FIGURE 19-12: PWM AUTO-SHUTDOWN WITH FIRMWARE RESTART (PxRSEN = 0)
19.4.5 AUTO-RESTART MODE
The Enhanced PWM can be configured to automatically
restart the PWM signal once the auto-shutdown condi-
tion has been removed. Auto-restart is enabled by
setting the PxRSEN bit (ECCPxDEL<7>).
If auto-restart is enabled, the ECCPxASE bit will
remain set as long as the auto-shutdown condition is
active. When the auto-shutdown condition is removed,
the ECCPxASE bit will be cleared via hardware and
normal operation will resume.
The module will wait until the next PWM period begins,
however, before re-enabling the output pin. This behav-
ior allows the auto-shutdown with auto-restart features
to be used in applications based on the current mode
of PWM control.
FIGURE 19-13: PWM AUTO-SHUT DOWN WITH AUTO-RESTART ENABLED (PxRSEN = 1)
Shutdown
PWM
ECCPxASE bit
Activity
Event
Shutdown
Event Occurs
Shutdown
Event Clears
PWM
Resumes
Normal PWM
Start of
PWM Period
ECCPxASE
Cleared by
Firmware
PWM Period
Shutdown
PWM
ECCPxASE bit
Activity
Event
Shutdown
Event Occurs
Shutdown
Event Clears
PWM
Resumes
Normal PWM
Start of
PWM Period
PWM Period
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19.4.6 PROGRAMMABLE DEAD-BAND
DELAY MODE
In half-bridge applications, where all power switches
are modulated at the PWM frequency, the power
switches normally require more time to turn off than to
turn on. If both the upper and lower power switches are
switched at the same time (one turned on and the other
turned off), both switches may be on for a short period
until one switch completely turns off. During this brief
interval, a very high current (shoot-through current) will
flow through both power switches, shorting the bridge
supply. To avoid this potentially destructive
shoot-through current from flowing during switching,
turning on either of the power switches is normally
delayed to allow the other switch to completely turn off.
In Half-Bridge mode, a digitally programmable,
dead-band delay is available to avoid shoot-through
current from destroying the bridge power switches. The
delay occurs at the signal transition from the non-active
state to the active state. For an illustration, see
Figure 19-14. The lower seven bits of the associated
ECCPxDEL register (Register 19-4) set the delay
period in terms of microcontroller instruction cycles
(T
CY or 4 TOSC).
FIGURE 19-14: EXAMPLE OF
HALF-BRIDGE PWM
OUTPUT
FIGU RE 19 -15: EXAMPLE OF HA LF-B RID GE APPL ICATIO NS
Period
Pulse Width
td
td
(1)
PxA(2)
PxB(2)
td = Dead-Band Delay
Period
(1) (1)
Note 1: At this time, the TMR2 register is equal to the
PR2 register.
2: Output signals are shown as active-high.
PxA
PxB
FET
Driver
FET
Driver
V+
V-
Load
+
V
-
+
V
-
Standard Half-Bridge Circuit (“Push-Pull”)
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DS39974A-page 286 Preliminary 2010 Microchip Technology Inc.
19.4.7 PULSE STEERING MODE
In Single Output mode, pulse steering allows any of the
PWM pins to be the modulated signal. Additionally, the
same PWM signal can simultaneously be available on
multiple pins.
Once the Single Output mode is selected
(CCPxM<3:2> = 11 and PxM<1:0> = 00 of the
CCPxCON register), the user firmware can bring out
the same PWM signal to one, two, three or four output
pins by setting the appropriate STR<D:A> bits
(PSTRxCON<3:0>), as provided in Table 19-3.
While the PWM Steering mode is active, the
CCPxM<1:0> bits (CCPxCON<1:0>) select the PWM
output polarity for the Px<D:A> pins.
The PWM auto-shutdown operation also applies to
PWM Steering mode, as described in Section 19.4.4
“Enhanced PWM Auto-Shutdown Mode”. An
auto-shutdown event will only affect pins that have
PWM outputs enabled.
REGISTER 19-4: ECCPxDEL: ECCP1/2/3 ENHANCED PWM CONTROL REGISTER
(1, ACCESS FBDh; 2, FB7h; 3, BANKED F18h)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
PxRSEN PxDC6 PxDC5 PxDC4 PxDC3 PxDC2 PxDC1 PxDC0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 PxRSEN: PWM Restart Enable bit
1 = Upon auto-shutdown, the ECCPxASE bit clears automatically once the shutdown event goes
away; the PWM restarts automatically
0 = Upon auto-shutdown, ECCPxASE must be cleared by software to restart the PWM
bit 6-0 PxDC<6:0>: PWM Delay Count bits
PxDCn = Number of FOSC/4 (4 * TOSC) cycles between the scheduled time when a PWM signal
should transition active and the actual time it does transition active.
Note: The associated TRIS bits must be set to
output (‘0’), to enable the pin output driver,
in order to see the PWM signal on the pin.
2010 Microchip Technology Inc. Preliminary DS39974A-page 287
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REGISTER 19-5: PSTRxCON: PULSE STEERING CONTROL
(1, ACCESS FBFh; 2, FB9h; 3, BANKED F1Ah)(1)
R/W-0 R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-1
CMPL1 CMPL0 — STRSYNC STRD STRC STRB STRA
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-6 CMPL<1:0>: Complementary Mode Output Assignment Steering Sync bits
1 = Modulated output pin toggles between PxA and PxB for each period
0 = Complementary output assignment is disabled; the STRD:STRA bits are used to determine Steer-
ing mode
bit 5 Unimplemented: Read as ‘0’
bit 4 STRSYNC: Steering Sync bit
1 = Output steering update occurs on the next PWM period
0 = Output steering update occurs at the beginning of the instruction cycle boundary
bit 3 STRD: Steering Enable D bit
1 = PxD pin has the PWM waveform with polarity control from CCPxM<1:0>
0 = PxD pin is assigned to a port pin
bit 2 STRC: Steering Enable C bit
1 = PxC pin has the PWM waveform with polarity control from CCPxM<1:0>
0 = PxC pin is assigned to a port pin
bit 1 STRB: Steering Enable B bit
1 = PxB pin has the PWM waveform with polarity control from CCPxM<1:0>
0 = PxB pin is assigned to a port pin
bit 0 STRA: Steering Enable A bit
1 = PxA pin has the PWM waveform with polarity control from CCPxM<1:0>
0 = PxA pin is assigned to a port pin
Note 1: The PWM Steering mode is available only when the CCPxCON register bits, CCPxM<3:2> = 11 and
PxM<1:0> = 00.
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FIGURE 19-16: SIMPLIFIED STEER ING
BLOCK DIAGRAM 19.4.7.1 Steering Synchronization
The STRSYNC bit of the PSTRxCON register gives the
user two choices for when the steering event will
happen. When the STRSYNC bit is ‘0’, the steering
event will happen at the end of the instruction that
writes to the PSTRxCON register. In this case, the out-
put signal at the Px<D:A> pins may be an incomplete
PWM waveform. This operation is useful when the user
firmware needs to immediately remove a PWM signal
from the pin.
When the STRSYNC bit is ‘1’, the effective steering
update will happen at the beginning of the next PWM
period. In this case, steering on/off the PWM output will
always produce a complete PWM waveform.
Figure 19-17 and Figure 19-18 illustrate the timing
diagrams of the PWM steering depending on the
STRSYNC setting.
FIGURE 19-17: EXAMPLE OF S TEERING EVENT AT END OF INSTRUCTION (STRSYNC = 0)
FIGURE 19-18: EXAMPLE OF STEERING EVENT AT BEGINNING OF INSTRUCTION (STRSYNC = 1)
1
0TRIS
Output Pin
PORT Data(1)
PxA Signal
STRA(2)
1
0TRIS
Output Pin
PORT Data(1)
STRB(2)
1
0
TRIS
Output Pin
PORT Data(1)
STRC(2)
1
0TRIS
Output Pin
PORT Data(1)
STRD(2)
Note 1: Port outputs are configured as displayed when
the CCPxCON register bits, PxM<1:0> = 00
and CCP1M<3:2> = 11.
2: Single PWM output requires setting at least
one of the STR<D:A> bits.
CCPxM1
CCPxM0
CCPxM1
CCPxM0
PWM
P1n = PWM
STRn
P1<D:A> PORT Data
PWM Period
PORT Data
PWM
PORT Data
P1n = PWM
STRn
P1<D:A> PORT Data
2010 Microchip Technology Inc. Preliminary DS39974A-page 289
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19.4.8 OPERATION IN POWER-MANAGED
MODES
In Sleep mode, all clock sources are disabled. Timer2
will not increment and the state of the module will not
change. If the ECCPx pin is driving a value, it will con-
tinue to drive that value. When the device wakes up, it
will continue from this state. If Two-Speed Start-ups are
enabled, the initial start-up frequency from HFINTOSC
and the postscaler may not be immediately stable.
In PRI_IDLE mode, the primary clock will continue to
clock the ECCPx module without change.
19.4.8.1 Operation with Fail-Safe
Clock Monitor (FSCM)
If the Fail-Safe Clock Monitor (FSCM) is enabled, a clock
failure will force the device into the power-managed
RC_RUN mode and the OSCFIF bit of the PIR2 register
will be set. The ECCPx will then be clocked from the
internal oscillator clock source, which may have a
different clock frequency than the primary clock.
19.4.9 EFFECTS OF A RESET
Both Power-on Reset and subsequent Resets will force
all ports to Input mode and the ECCP registers to their
Reset states.
This forces the ECCP module to reset to a state
compatible with previous, non-enhanced CCP modules
used on other PIC18 and PIC16 devices.
TABLE 19-4: REGISTERS ASSOCIATED WITH ECCP1/2/3 MODULE AND
TIMER1/2/3/4/6/8
File Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF
RCON IPEN —CM RI TO PD POR BOR
PIR1 PMPIF ADIF RC1IF TX1IF SSP1IF CCP1IF TMR2IF TMR1IF
PIR2 OSCFIF CM2IF CM1IF —BCL1IF HLVDIF TMR3IF CCP2IF
PIR4 CCP10IF CCP9IF CCP8IF CCP7IF CCP6IF CCP5IF CCP4IF CCP3IF
PIE1 PMPIE ADIE RC1IE TX1IE SSP1IE CCP1IE TMR2IE TMR1IE
PIE2 OSCFIE CM2IE CM1IE —BCL1IE HLVDIE TMR3IE CCP2IE
PIE4 CCP10IE CCP9IE CCP8IE CCP7IE CCP6IE CCP5IE CCP4IE CCP3IE
IPR1 PMPIP ADIP RC1IP TX1IP SSP1IP CCP1IP TMR2IP TMR1IP
IPR2 OSCFIP CM2IP CM1IP —BCL1IP HLVDIP TMR3IP CCP2IP
IPR4 CCP10IP CCP9IP CCP8IP CCP7IP CCP6IP CCP5IP CCP4IP CCP3IP
TRISB TRISB7 TRISB6 TRISB5 TRISB4 TRISB3 TRISB2 TRISB1 TRISB0
TRISC TRISC7 TRISC6 — — — TRISC2 TRISC1 TRISC0
TRISE RDPU REPU — — — TRISE2 TRISE1 TRISE0
TMR1H Timer1 Register High Byte
TMR1L Timer1 Register Low Byte
TMR2 Timer2 Register
TMR3H Timer3 Register High Byte
TMR3L Timer3 Register Low Byte
TMR4 Timer4 Register
TMR6 Timer6 Register
TMR8 Timer8 Register
PR2 Timer2 Period Register
PR4 Timer4 Period Register
PR6 Timer6 Period Register
PR8 Timer8 Period Register
T1CON TMR1CS1 TMR1CS0 T1CKPS1 T1CKPS0 T1OSCEN T1SYNC RD16 TMR1ON
T2CON — T2OUTPS3 T2OUTPS2 T2OUTPS1 T2OUTPS0 TMR2ON T2CKPS1 T2CKPS0
T3CON TMR3CS1 TMR3CS0 T3CKPS1 T3CKPS0 T3OSCEN T3SYNC RD16 TMR3ON
T4CON — T4OUTPS3 T4OUTPS2 T4OUTPS1 T4OUTPS0 TMR4ON T4CKPS1 T4CKPS0
T6CON — T6OUTPS3 T6OUTPS2 T6OUTPS1 T6OUTPS0 TMR6ON T6CKPS1 T6CKPS0
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DS39974A-page 290 Preliminary 2010 Microchip Technology Inc.
T8CON — T8OUTPS3 T8OUTPS2 T8OUTPS1 T8OUTPS0 TMR8ON T8CKPS1 T8CKPS0
CCPR1H Capture/Compare/PWM Register 1 High Byte
CCPR1L Capture/Compare/PWM Register 1 Low Byte
CCPR2H Capture/Compare/PWM Register 2 High Byte
CCPR2L Capture/Compare/PWM Register 2 Low Byte
CCPR3H Capture/Compare/PWM Register 3 High Byte
CCPR3L Capture/Compare/PWM Register 3 Low Byte
CCP1CON P1M1 P1M0 DC1B1 DC1B0 CCP1M3 CCP1M2 CCP1M1 CCP1M0
CCP2CON P2M1 P2M0 DC2B1 DC2B0 CCP2M3 CCP2M2 CCP2M1 CCP2M0
CCP3CON P3M1 P3M0 DC3B1 DC3B0 CCP3M3 CCP3M2 CCP3M1 CCP3M0
TABLE 19-4: REGISTERS ASSOCIATED WITH ECCP1/2/3 MODULE AND
TIMER1/2/3/4/6/8 (CONTINUED)
File Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
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20.0 MASTER SYNCHR ONOUS
SERIAL PORT (MS SP)
MODULE
The Master Synchronous Serial Port (MSSP) module is
a serial interface, useful for communicating with other
peripheral or microcontroller devices. These peripheral
devices include serial EEPROMs, shift registers,
display drivers and A/D Converters.
20.1 Master SSP (MSSP) Module
Overview
The MSSP module can operate in one of two modes:
• Serial Peripheral Interface (SPI)
• Inter-Integrated Circuit (I2C™)
- Full Master mode
- Slave mode (with general address call)
The I2C interface supports the following modes in
hardware:
•Master mode
• Multi-Master mode
• Slave mode with 5-bit and 7-bit address masking
(with address masking for both 10-bit and 7-bit
addressing)
All members of the PIC18F47J13 family have two
MSSP modules, designated as MSSP1 and MSSP2.
The modules operate independently:
• PIC18F4XJ13 devices – Both modules can be
configured for either I2C or SPI communication
• PIC18F2XJ13 devices:
- MSSP1 can be used for either I2C or SPI
communication
- MSSP2 can be used only for SPI
communication
All of the MSSP1 module related SPI and I2C I/O
functions are hard-mapped to specific I/O pins.
For MSSP2 functions:
• SPI I/O functions (SDO2, SDI2, SCK2 and SS2)
are all routed through the Peripheral Pin Select
(PPS) module.
These functions may be configured to use any of
the RPn remappable pins, as described in
Section 10.7 “Peripheral Pin Select (PPS)”.
•I
2C functions (SCL2 and SDA2) have fixed pin
locations.
On all PIC18F47J13 family devices, the SPI DMA
capability can only be used in conjunction with MSSP2.
The SPI DMA feature is described in Section 20.4
“SPI DMA Module”.
Note: Throughout this section, generic refer-
ences to an MSSP module in any of its
operating modes may be interpreted as
being equally applicable to MSSP1 or
MSSP2. Register names and module I/O
signals use the generic designator ‘x’ to
indicate the use of a numeral to distinguish
a particular module when required. Control
bit names are not individuated.
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20.2 Control Registers
Each MSSP module has three associated control
registers. These include a status register (SSPxSTAT)
and two control registers (SSPxCON1 and SSPxCON2).
The use of these registers and their individual Configura-
tion bits differs significantly depending on whether the
MSSP module is operated in SPI or I2C mode.
Additional details are provided under the individual
sections.
20.3 SPI Mode
The SPI mode allows 8 bits of data to be synchronously
transmitted and received simultaneously. All four
modes of SPI are supported.
When MSSP2 is used in SPI mode, it can optionally be
configured to work with the SPI DMA submodule
described in Section 20.4 “SPI DMA Module”.
To accomplish communication, typically three pins are
used:
• Serial Data Out (SDOx) – RC5/SDO1/RP16 or
SDO2/Remappable
• Serial Data In (SDIx) – RC4/SDI1/SDA1/RP15 or
SDI2/Remappable
• Serial Clock (SCKx) – RC3/SCK1/SCL1/RP14 or
SCK2/Remappable
Additionally, a fourth pin may be used when in a Slave
mode of operation:
• Slave Select (SSx) – RA5/AN4/C1INC/SS1/
HLVDIN/RP2 or SS2/Remappable
Figure 20-1 depicts the block diagram of the MSSP
module when operating in SPI mode.
FIGURE 20-1: MSSPx BLOCK DIAGRAM
(SPI MODE)
Note: In devices with more than one MSSP
module, it is very important to pay close
attention to the SSPxCON register names.
SSP1CON1 and SSP1CON2 control
different operational aspects of the same
module, while SSP1CON1 and
SSP2CON1 control the same features for
two different modules.
( )
Read Write
Internal
Data Bus
SSPxSR reg
SSPM<3:0>
bit 0 Shift
Clock
SSx Control
Enable
Edge
Select
Clock Select
TMR2 Output
TOSC
Prescaler
4,
8, 16, 64
2
Edge
Select
2
4
Data to TXx/RXx in SSPxSR
TRIS bit
2
SMP:CKE
SDOx
SSPxBUF reg
SDIx
SSx
SCKx
Note: Only port I/O names are used in this diagram for
the sake of brevity. Refer to the text for a full list of
multiplexed functions.
2010 Microchip Technology Inc. Preliminary DS39974A-page 293
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20.3.1 REGISTERS
Each MSSP module has four registers for SPI mode
operation. These are:
• MSSPx Control Register 1 (SSPxCON1)
• MSSPx Status Register (SSPxSTAT)
• Serial Receive/Transmit Buffer Register
(SSPxBUF)
• MSSPx Shift Register (SSPxSR) – Not directly
accessible
SSPxCON1 and SSPxSTAT are the control and status
registers in SPI mode operation. The SSPxCON1
register is readable and writable. The lower six bits of
the SSPxSTAT are read-only. The upper two bits of the
SSPxSTAT are read/write.
SSPxSR is the shift register used for shifting data in or
out. SSPxBUF is the buffer register to which data
bytes are written to or read from.
In receive operations, SSPxSR and SSPxBUF
together, create a double-buffered receiver. When
SSPxSR receives a complete byte, it is transferred to
SSPxBUF and the SSPxIF interrupt is set.
During transmission, the SSPxBUF is not
double-buffered. A write to SSPxBUF will write to both
SSPxBUF and SSPxSR.
Note: Because the SSPxBUF register is
double-buffered, using read-modify-write
instructions such as BCF, COMF, etc., will not
work.
Similarly, when debugging under an
in-circuit debugger, performing actions that
cause reads of SSPxBUF (mouse hover-
ing, watch, etc.) can consume data that the
application code was expecting to receive.
REGISTER 20-1: SSPxSTAT: MSSPx STATUS REGISTER (SPI MODE) (ACCESS 1, FC7h; 2, F73h)
R/W-1 R/W-1 R-1 R-1 R-1 R-1 R-1 R-1
SMP CKE(1) D/A PSR/WUA BF
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 SMP: Sample bit
SPI Master mode:
1 = Input data sampled at the end of data output time
0 = Input data sampled at the middle of data output time
SPI Slave mode:
SMP must be cleared when SPI is used in Slave mode.
bit 6 CKE: SPI Clock Select bit(1)
1 = Transmit occurs on transition from active to Idle clock state
0 = Transmit occurs on transition from Idle to active clock state
bit 5 D/A: Data/Address bit
Used in I2C™ mode only.
bit 4 P: Stop bit
Used in I2C mode only; this bit is cleared when the MSSP module is disabled, SSPEN is cleared.
bit 3 S: Start bit
Used in I2C mode only.
bit 2 R/W: Read/Write Information bit
Used in I2C mode only.
bit 1 UA: Update Address bit
Used in I2C mode only.
bit 0 BF: Buffer Full Status bit
1 = Receive complete, SSPxBUF is full
0 = Receive not complete, SSPxBUF is empty
Note 1: Polarity of the clock state is set by the CKP bit (SSPxCON1<4>).
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REGISTER 20-2: SSPxCON1: MSSPx CONTROL REGISTER 1 (SPI MODE)
(1, ACCESS FC6h; 2, F72h)
R/W-0 R/C-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
WCOL SSPOV(1) SSPEN(2) CKP SSPM3(3) SSPM2(3) SSPM1(3) SSPM0(3)
bit 7 bit 0
Legend: C = Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 WCOL: Write Collision Detect bit
1 = The SSPxBUF register is written while it is still transmitting the previous word (must be cleared in
software)
0 = No collision
bit 6 SSPOV: Receive Overflow Indicator bit(1)
SPI Slave mode:
1 = A new byte is received while the SSPxBUF register is still holding the previous data. In case of over-
flow, the data in SSPxSR is lost. Overflow can only occur in Slave mode. The user must read the
SSPxBUF, even if only transmitting data, to avoid setting overflow (must be cleared in software).
0 = No overflow
bit 5 SSPEN: Master Synchronous Serial Port Enable bit(2)
1 = Enables serial port and configures SCKx, SDOx, SDIx and SSx as serial port pins
0 = Disables serial port and configures these pins as I/O port pins
bit 4 CKP: Clock Polarity Select bit
1 = Idle state for clock is a high level
0 = Idle state for clock is a low level
bit 3-0 SSPM<3:0>: Master Synchronous Serial Port Mode Select bits(3)
0101 = SPI Slave mode, clock = SCKx pin; SSx pin control disabled, SSx can be used as I/O pin
0100 = SPI Slave mode, clock = SCKx pin; SSx pin control enabled
0011 = SPI Master mode, clock = TMR2 output/2
0010 = SPI Master mode, clock = FOSC/64
0001 = SPI Master mode, clock = FOSC/16
1010 = SPI Master mode, clock = FOSC/8
0000 = SPI Master mode, clock = FOSC/4
Note 1: In Master mode, the overflow bit is not set since each new reception (and transmission) is initiated by
writing to the SSPxBUF register.
2: When enabled, this pin must be properly configured as input or output.
3: Bit combinations not specifically listed here are either reserved or implemented in I2C™ mode only.
2010 Microchip Technology Inc. Preliminary DS39974A-page 295
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20.3.2 OPERATION
When initializing the SPI, several options need to be
specified. This is done by programming the appropriate
control bits (SSPxCON1<5:0> and SSPxSTAT<7:6>).
These control bits allow the following to be specified:
• Master mode (SCKx is the clock output)
• Slave mode (SCKx is the clock input)
• Clock Polarity (Idle state of SCKx)
• Data Input Sample Phase (middle or end of data
output time)
• Clock Edge (output data on rising/falling edge of
SCKx)
• Clock Rate (Master mode only)
• Slave Select mode (Slave mode only)
Each MSSP module consists of a Transmit/Receive
Shift register (SSPxSR) and a Buffer register
(SSPxBUF). The SSPxSR shifts the data in and out of
the device, MSb first. The SSPxBUF holds the data that
was written to the SSPxSR until the received data is
ready. Once the 8 bits of data have been received, that
byte is moved to the SSPxBUF register. Then, the Buffer
Full (BF) detect bit (SSPxSTAT<0>) and the interrupt
flag bit, SSPxIF, are set. This double-buffering of the
received data (SSPxBUF) allows the next byte to start
reception before reading the data that was just received.
Any write to the SSPxBUF register during transmission
or reception of data will be ignored and the Write
Collision Detect bit, WCOL (SSPxCON1<7>), will be set.
User software must clear the WCOL bit so that it can be
determined if the following write(s) to the SSPxBUF
register completed successfully.
The Buffer Full bit, BF (SSPxSTAT<0>), indicates when
SSPxBUF has been loaded with the received data
(transmission is complete). When the SSPxBUF is read,
the BF bit is cleared. This data may be irrelevant if the
SPI is only a transmitter. Generally, the MSSP interrupt
is used to determine when the transmission/reception
has completed. If the interrupt method is not going to be
used, then software polling can be done to ensure that a
write collision does not occur.
Example 20-1 provides the loading of the SSPxBUF
(SSPxSR) for data transmission.
The SSPxSR is not directly readable or writable and
can only be accessed by addressing the SSPxBUF
register. Additionally, the SSPxSTAT register indicates
the various status conditions.
20.3.3 OPEN-DRAIN OUTPUT OPTION
The drivers for the SDOx output and SCKx clock pins
can be optionally configured as open-drain outputs.
This feature allows the voltage level on the pin to be
pulled to a higher level through an external pull-up
resistor, provided the SDOx or SCKx pin is not multi-
plexed with an ANx analog function. This allows the
output to communicate with external circuits without the
need for additional level shifters. For more information,
see Section 10.1.4 “Open-Drain Outputs”.
The open-drain output option is controlled by the
SPI2OD and SPI1OD bits (ODCON3<1:0>). Setting an
SPIxOD bit configures both the SDOx and SCKx pins for
the corresponding open-drain operation.
EXAMPLE 20-1: LOADING THE SSP1BUF (SSP1SR) REGISTER
Note: When the application software is expecting
to receive valid data, the SSPxBUF should
be read before the next byte of transfer
data is written to the SSPxBUF. Application
software should follow this process even
when the current contents of SSPxBUF
are not important.
LOOP BTFSS SSP1STAT, BF ;Has data been received (transmit complete)?
BRA LOOP ;No
MOVF SSP1BUF, W ;WREG reg = contents of SSP1BUF
MOVWF RXDATA ;Save in user RAM, if data is meaningful
MOVF TXDATA, W ;W reg = contents of TXDATA
MOVWF SSP1BUF ;New data to xmit
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20.3.4 ENABLING SPI I/O
To enable the serial port, MSSP Enable bit, SSPEN
(SSPxCON1<5>), must be set. To reset or reconfigure
SPI mode, clear the SSPEN bit, re-initialize the
SSPxCON1 registers and then set the SSPEN bit. This
configures the SDIx, SDOx, SCKx and SSx pins as
serial port pins. For the pins to behave as the serial port
function, the appropriate TRISx bits, PCFGx bits and
Peripheral Pin Select registers (if using MSSP2) should
be correctly initialized prior to setting the SSPEN bit.
A typical SPI serial port initialization process follows:
• Initialize the ODCON3 register (optional
open-drain output control)
• Initialize the remappable pin functions (if using
MSSP2, see Section 10.7 “Peripheral Pin
Select (PPS)”)
• Initialize the SCKx/LAT value to the desired Idle
SCKx level (if master device)
• Initialize the SCKx/PCFGx bit (if in Slave mode
and multiplexed with the ANx function)
• Initialize the SCKx/TRISx bit as an output (Master
mode) or input (Slave mode)
• Initialize the SDIx/PCFGx bit (if SDIx is
multiplexed with the ANx function)
• Initialize the SDIx/TRISx bit
• Initialize the SSx/PCFG bit (if in Slave mode and
multiplexed with the ANx function)
• Initialize the SSx/TRISx bit (Slave modes)
• Initialize the SDOx/TRISx bit
• Initialize the SSPxSTAT register
• Initialize the SSPxCON1 register
• Set the SSPEN bit to enable the module
Any MSSP1 serial port function that is not desired may
be overridden by programming the corresponding Data
Direction (TRIS) register to the opposite value. If
individual MSSP2 serial port functions will not be used,
they may be left unmapped.
20.3.5 TYPICAL CONNECTION
Figure 20-2 illustrates a typical connection between two
microcontrollers. The master controller (Processor 1)
initiates the data transfer by sending the SCKx signal.
Data is shifted out of both shift registers on their pro-
grammed clock edge and latched on the opposite edge
of the clock. Both processors should be programmed to
the same Clock Polarity (CKP), then both controllers
would send and receive data at the same time. Whether
the data is meaningful (or dummy data) depends on the
application software. This leads to three scenarios for
data transmission:
• Master sends valid data–Slave sends dummy
data
• Master sends valid data–Slave sends valid data
• Master sends dummy data–Slave sends valid data
FIGURE 20-2: SPI MASTER/SLAVE CONNECTION
Note: When MSSP2 is used in SPI Master
mode, the SCK2 function must be config-
ured as both an output and an input in the
PPS module. SCK2 must be initialized as
an output pin (by writing 0x0A to one of the
RPORx registers). Additionally, SCK2IN
must also be mapped to the same pin by
initializing the RPINR22 register. Failure to
initialize SCK2/SCK2IN as both output
and input will prevent the module from
receiving data on the SDI2 pin, as the
module uses the SCK2IN signal to latch
the received data.
Serial Input Buffer
(SSPxBUF)
Shift Register
(SSPxSR)
MSb LSb
SDOx
SDIx
PROCESSOR 1
SCKx
SPI Master SSPM<3:0> = 00xxb
Serial Input Buffer
(SSPxBUF)
Shift Register
(SSPxSR)
LSb
MSb
SDIx
SDOx
PROCESSOR 2
SCKx
SPI Slave SSPM<3:0> = 010xb
Serial Clock
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20.3.6 MASTER MODE
The master can initiate the data transfer at any time
because it controls the SCKx. The master determines
when the slave (Processor 2, Figure 20-2) is to
broadcast data by the software protocol.
In Master mode, the data is transmitted/received as
soon as the SSPxBUF register is written to. If the SPI
is only going to receive, the SDOx output could be dis-
abled (programmed as an input). The SSPxSR register
will continue to shift in the signal present on the SDIx
pin at the programmed clock rate. As each byte is
received, it will be loaded into the SSPxBUF register as
if it is a normal received byte (interrupts and status bits
are appropriately set). This could be useful in receiver
applications as a “Line Activity Monitor” mode.
The CKP is selected by appropriately programming the
CKP bit (SSPxCON1<4>). This then, would give
waveforms for SPI communication, as illustrated in
Figure 20-3, Figure 20-5 and Figure 20-6, where the
Most Significant Byte (MSB) is transmitted first. In
Master mode, the SPI clock rate (bit rate) is
user-programmable to be one of the following:
•F
OSC/4 (or TCY)
•FOSC/8 (or 2 • TCY)
•F
OSC/16 (or 4 • TCY)
•FOSC/64 (or 16 • TCY)
• Timer2 output/2
When using the Timer2 output/2 option, the Period
Register 2 (PR2) can be used to determine the SPI bit
rate. However, only PR2 values of 0x01 to 0xFF are
valid in this mode.
Figure 20-3 illustrates the waveforms for Master mode.
When the CKE bit is set, the SDOx data is valid before
there is a clock edge on SCKx. The change of the input
sample is shown based on the state of the SMP bit. The
time when the SSPxBUF is loaded with the received
data is shown.
FIGURE 20-3: SPI MODE WAVEFORM (MASTER MODE)
Note: To avoid lost data in Master mode, a read of
the SSPxBUF must be performed to clear the
Buffer Full (BF) detect bit (SSPxSTAT<0>)
between each transmission.
SCKx
(CKP = 0
SCKx
(CKP = 1
SCKx
(CKP = 0
SCKx
(CKP = 1
4 Clock
Modes
Input
Sample
Input
Sample
SDIx
bit 7 bit 0
SDOx bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0
bit 7
SDIx
SSPxIF
(SMP = 1)
(SMP = 0)
(SMP = 1)
CKE = 1)
CKE = 0)
CKE = 1)
CKE = 0)
(SMP = 0)
Write to
SSPxBUF
SSPxSR to
SSPxBUF
SDOx bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0
(CKE = 0)
(CKE = 1)
Next Q4 Cycle
after Q2
bit 0
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20.3.7 SLAVE MODE
In Slave mode, the data is transmitted and received as
the external clock pulses appear on SCKx. When the
last bit is latched, the SSPxIF interrupt flag bit is set.
While in Slave mode, the external clock is supplied by
the external clock source on the SCKx pin. This
external clock must meet the minimum high and low
times as specified in the electrical specifications.
While in Sleep mode, the slave can transmit/receive
data. When a byte is received, the device can be
configured to wake-up from Sleep.
20.3.8 SLAVE SELECT
SYNCHRONIZATION
The SSx pin allows a Synchronous Slave mode. The
SPI must be in Slave mode with the SSx pin control
enabled (SSPxCON1<3:0> = 04h). When the SSx pin
is low, transmission and reception are enabled and the
SDOx pin is driven. When the SSx pin goes high, the
SDOx pin is no longer driven, even if in the middle of a
transmitted byte and becomes a floating output.
External pull-up/pull-down resistors may be desirable
depending on the application.
When the SPI module resets, the bit counter is forced
to ‘0’. This can be done by either forcing the SSx pin to
a high level or clearing the SSPEN bit.
To emulate two-wire communication, the SDOx pin can
be connected to the SDIx pin. When the SPI needs to
operate as a receiver, the SDOx pin can be configured
as an input. This disables transmissions from the
SDOx. The SDIx can always be left as an input (SDIx
function) since it cannot create a bus conflict.
FIGURE 20-4: SLAVE SYNCHRONIZATION WAVEFORM
Note 1: When the SPI is in Slave mode with
the SSx pin control enabled
(SSPxCON1<3:0> = 0100), the SPI
module will reset if the SSx pin is set to
VDD.
2: If the SPI is used in Slave mode with CKE
set, then the SSx pin control must be
enabled.
SCKx
(CKP = 1
SCKx
(CKP = 0
Input
Sample
SDIx
bit 7
SDOx bit 7 bit 6 bit 7
SSPxIF
Interrupt
(SMP = 0)
CKE = 0)
CKE = 0)
(SMP = 0)
Write to
SSPxBUF
SSPxSR to
SSPxBUF
SSx
Flag
bit 0
bit 7
bit 0
Next Q4 Cycle
after Q2
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FIGUR E 20-5: SPI MODE WAVEFORM (SLAVE MODE WITH CKE = 0)
FIGUR E 20-6: SPI MODE WAVEFORM (SLAVE MODE WITH CKE = 1)
SCKx
(CKP = 1
SCKx
(CKP = 0
Input
Sample
SDIx
bit 7
SDOx bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0
SSPxIF
Interrupt
(SMP = 0)
CKE = 0)
CKE = 0)
(SMP = 0)
Write to
SSPxBUF
SSPxSR to
SSPxBUF
SSx
Flag
Optional
Next Q4 Cycle
after Q2
bit 0
SCKx
(CKP = 1
SCKx
(CKP = 0
Input
Sample
SDIx
bit 7 bit 0
SDOx bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0
SSPxIF
Interrupt
(SMP = 0)
CKE = 1)
CKE = 1)
(SMP = 0)
Write to
SSPxBUF
SSPxSR to
SSPxBUF
SSx
Flag
Not Optional
Next Q4 Cycle
after Q2
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20.3.9 OPERATION IN POWER-MANAGED
MODES
In SPI Master mode, module clocks may be operating
at a different speed than when in Full-Power mode. In
the case of Sleep mode, all clocks are Halted.
In Idle modes, a clock is provided to the peripherals.
That clock can be from the primary clock source, the
secondary clock (Timer1 oscillator) or the INTOSC
source. See Section 3.3 “Clock Sources and
Oscillato r Switchin g” for additional information.
In most cases, the speed that the master clocks SPI
data is not important; however, this should be
evaluated for each system.
If MSSP interrupts are enabled, they can wake the
controller from Sleep mode, or one of the Idle modes,
when the master completes sending data. If an exit
from Sleep or Idle mode is not desired, MSSP
interrupts should be disabled.
If the Sleep mode is selected, all module clocks are
Halted and the transmission/reception will remain in
that state until the device wakes. After the device
returns to Run mode, the module will resume
transmitting and receiving data.
In SPI Slave mode, the SPI Transmit/Receive Shift
register operates asynchronously to the device. This
allows the device to be placed in any power-managed
mode and data to be shifted into the SPI
Transmit/Receive Shift register. When all 8 bits have
been received, the MSSPx interrupt flag bit will be set,
and if enabled, will wake the device.
20.3.10 EFFECTS OF A RESET
A Reset disables the MSSP modules and terminates
the current transfer.
20.3.11 BUS MODE COMPATIBILITY
Table 20-1 provides the compatibility between the
standard SPI modes and the states of the CKP and
CKE control bits.
TABLE 20-1: SPI BUS MODES
There is also an SMP bit, which controls when the data
is sampled.
20.3.12 SPI CLOCK SPEED AND MODULE
INTERACTIONS
Because MSSP1 and MSSP2 are independent
modules, they can operate simultaneously at different
data rates. Setting the SSPM<3:0> bits of the
SSPxCON1 register determines the rate for the
corresponding module.
An exception is when both modules use Timer2 as a
time base in Master mode. In this instance, any
changes to the Timer2 module’s operation will affect
both MSSP modules equally. If different bit rates are
required for each module, the user should select one of
the other three time base options for one of the
modules.
Standard SPI Mode
Terminology
Control Bits State
CKP CKE
0, 0 0 1
0, 1 0 0
1, 0 1 1
1, 1 1 0
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TABLE 20-2: REGISTERS ASSOCIATED WITH SPI OPERATION
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF
PIR1 PMPIF(2) ADIF RC1IF TX1IF SSP1IF CCP1IF TMR2IF TMR1IF
PIE1 PMPIE(2) ADIE RC1IE TX1IE SSP1IE CCP1IE TMR2IE TMR1IE
IPR1 PMPIP(2) ADIP RC1IP TX1IP SSP1IP CCP1IP TMR2IP TMR1IP
PIR3 SSP2IF BCL2IF RC2IF TX2IF TMR4IF CTMUIF TMR3GIF RTCCIF
PIE3 SSP2IE BCL2IE RC2IE TX2IE TMR4IE CTMUIE TMR3GIE RTCCIE
IPR3 SSP2IP BCL2IP RC2IP TX2IP TMR4IP CTMUIP TMR3GIP RTCCIP
TRISB TRISB7 TRISB6 TRISB5 TRISB4 TRISB3 TRISB2 TRISB1 TRISB0
TRISC TRISC7 TRISC6 — — — TRISC2 TRISC1 TRISC0
TRISD TRISD7 TRISD6 TRISD5 TRISD4 TRISD3 TRISD2 TRISD1 TRISD0
SSP1BUF MSSP1 Receive Buffer/Transmit Register
SSPxCON1 WCOL SSPOV SSPEN CKP SSPM3 SSPM2 SSPM1 SSPM0
SSPxSTAT SMP CKE D/A P S R/W UA BF
SSP2BUF MSSP2 Receive Buffer/Transmit Register
ODCON3(1) CTMUDS — — — — — SPI2OD SPI1OD
Legend: Shaded cells are not used by the MSSPx module in SPI mode.
Note 1: Configuration SFR overlaps with default SFR at this address; available only when WDTCON<4> = 1.
2: These bits are only available on 44-pin devices.
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20.4 SPI DMA MODULE
The SPI DMA module contains control logic to allow the
MSSP2 module to perform SPI direct memory access
transfers. This enables the module to quickly transmit
or receive large amounts of data with relatively little
CPU intervention. When the SPI DMA module is used,
MSSP2 can directly read and write to general purpose
SRAM. When the SPI DMA module is not enabled,
MSSP2 functions normally, but without DMA capability.
The SPI DMA module is composed of control logic, a
Destination Receive Address Pointer, a Transmit
Source Address Pointer, an interrupt manager and a
Byte Count register for setting the size of each DMA
transfer. The DMA module may be used with all SPI
Master and Slave modes, and supports both
half-duplex and full-duplex transfers.
20.4.1 I/O PIN CONSIDERATIONS
When enabled, the SPI DMA module uses the MSSP2
module. All SPI input and output signals, related to
MSSP2, are routed through the Peripheral Pin Select
module. The appropriate initialization procedure, as
described in Section 20.4.6 “Using the SPI DMA
Module”, will need to be followed prior to using the SPI
DMA module. The output pins assigned to the SDO2
and SCK2 functions can optionally be configured as
open-drain outputs, such as for level shifting operations
mentioned in the same section.
20.4.2 RAM TO RAM COPY OPERATIONS
Although the SPI DMA module is primarily intended to
be used for SPI communication purposes, the module
can also be used to perform RAM to RAM copy opera-
tions. To do this, configure the module for Full-Duplex
Master mode operation, but assign the SDO2 output
and SDI2 input functions onto the same RPn pin in the
PPS module. Also assign SCK2 out and SCK2 in onto
the same RPn pin (a different pin than used for SDO2
and SDI2). This will allow the module to operate in
Loopback mode, providing RAM copy capability.
20.4.3 IDLE AND SLEEP
CONSIDERATIONS
The SPI DMA module remains fully functional when the
microcontroller is in Idle mode.
During normal Sleep, the SPI DMA module is not func-
tional and should not be used. To avoid corrupting a
transfer, user firmware should be careful to make
certain that pending DMA operations are complete by
polling the DMAEN bit in the DMACON1 register prior
to putting the microcontroller into Sleep.
In SPI Slave modes, the MSSP2 module is capable of
transmitting and/or receiving one byte of data while in
Sleep mode. This allows the SSP2IF flag in the PIR3
register to be used as a wake-up source. When the
DMAEN bit is cleared, the SPI DMA module is
effectively disabled, and the MSSP2 module functions
normally, but without DMA capabilities. If the DMAEN
bit is clear prior to entering Sleep, it is still possible to
use the SSP2IF as a wake-up source without any data
loss.
Neither MSSP2 nor the SPI DMA module will provide
any functionality in Deep Sleep. Upon exiting from
Deep Sleep, all of the I/O pins, MSSP2 and SPI DMA
related registers will need to be fully re-initialized
before the SPI DMA module can be used again.
20.4.4 REGISTERS
The SPI DMA engine is enabled and controlled by the
following Special Function Registers:
• DMACON1 • DMACON2
• TXADDRH • TXADDRL
• RXADDRH • RXADDRL
• DMABCH • DMABCL
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20.4.4.1 DMACON1
The DMACON1 register is used to select the main
operating mode of the SPI DMA module. The SSCON1
and SSCON0 bits are used to control the slave select
pin.
When MSSP2 is used in SPI Master mode with the SPI
DMA module, SSDMA can be controlled by the DMA
module as an output pin. If MSSP2 will be used to com-
municate with an SPI slave device that needs the SSx
pin to be toggled periodically, the SPI DMA hardware
can automatically be used to deassert SSx between
each byte, every two bytes or every four bytes.
Alternatively, user firmware can manually generate
slave select signals with normal general purpose I/O
pins, if required by the slave device(s).
When the TXINC bit is set, the TXADDR register will
automatically increment after each transmitted byte.
Automatic transmit address increment can be disabled
by clearing the TXINC bit. If the automatic transmit
address increment is disabled, each byte which is out-
put on SDO2, will be the same (the contents of the
SRAM pointed to by the TXADDR register) for the
entire DMA transaction.
When the RXINC bit is set, the RXADDR register will
automatically increment after each received byte.
Automatic receive address increment can be disabled
by clearing the RXINC bit. If RXINC is disabled in
Full-Duplex or Half-Duplex Receive modes, all incom-
ing data bytes on SDI2 will overwrite the same memory
location pointed to by the RXADDR register. After the
SPI DMA transaction has completed, the last received
byte will reside in the memory location pointed to by the
RXADDR register.
The SPI DMA module can be used for either half-duplex
receive only communication, half-duplex transmit only
communication or full-duplex simultaneous transmit and
receive operations. All modes are available for both SPI
master and SPI slave configurations. The DUPLEX0
and DUPLEX1 bits can be used to select the desired
operating mode.
The behavior of the DLYINTEN bit varies greatly
depending on the SPI operating mode. For example
behavior for each of the modes, see Figure 20-3
through Figure 20-6.
SPI Slave mode, DLYINTEN = 1: In this mode, an
SSP2IF interrupt will be generated during a transfer if
the time between successful byte transmission events
is longer than the value set by the DLYCYC<3:0> bits
in the DMACON2 register. This interrupt allows slave
firmware to know that the master device is taking an
unusually large amount of time between byte transmis-
sions. For example, this information may be useful for
implementing application defined communication
protocols involving time-outs if the bus remains Idle for
too long. When DLYINTEN = 1, the DLYCYC<3:0>
interrupts occur normally according to the selected
setting.
SPI Slave mode, DLYINTEN = 0: In this mode, the
time-out based interrupt is disabled. No additional
SSP2IF interrupt events will be generated by the SPI
DMA module, other than those indicated by the
INTLVL<3:0> bits in the DMACON2 register. In this
mode, always set DLYCYC<3:0> = 0000.
SPI Master mode, DLYINTEN = 0: The DLYCYC<3:0>
bits in the DMACON2 register determine the amount of
additional inter-byte delay, which is added by the SPI
DMA module during a transfer. The Master mode SS2
output feature may be used.
SPI Master mode, DLYINTEN = 1: The amount of
hardware overhead is slightly reduced in this mode,
and the minimum inter-byte delay is 8 T
CY for FOSC/4,
9 TCY for FOSC/16 and 15 TCY for FOSC/64. This mode
can potentially be used to obtain slightly higher effec-
tive SPI bandwidth. In this mode, the SS2 control
feature cannot be used, and should always be disabled
(DMACON1<7:6> = 00). Additionally, the interrupt
generating hardware (used in Slave mode) remains
active. To avoid extraneous SSP2IF interrupt events,
set the DMACON2 delay bits, DLYCYC<3:0> = 1111,
and ensure that the SPI serial clock rate is no slower
than FOSC/64.
In SPI Master modes, the DMAEN bit is used to enable
the SPI DMA module and to initiate an SPI DMA trans-
action. After user firmware sets the DMAEN bit, the
DMA hardware will begin transmitting and/or receiving
data bytes according to the configuration used. In SPI
Slave modes, setting the DMAEN bit will finish the
initialization steps needed to prepare the SPI DMA
module for communication (which still must be initiated
by the master device).
To avoid possible data corruption, once the DMAEN bit
is set, user firmware should not attempt to modify any
of the MSSP2 or SPI DMA related registers, with the
exception of the INTLVL bits in the DMACON2 register.
If user firmware wants to Halt an ongoing DMA transac-
tion, the DMAEN bit can be manually cleared by the
firmware. Clearing the DMAEN bit while a byte is
currently being transmitted will not immediately Halt the
byte in progress. Instead, any byte currently in
progress will be completed before the MSSP2 and SPI
DMA modules go back to their Idle conditions. If user
firmware clears the DMAEN bit, the TXADDR,
RXADDR and DMABC registers will no longer update,
and the DMA module will no longer make any
additional read or writes to SRAM; therefore, state
information can be lost.
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REGISTER 20-3: DMACON1: DMA CONTROL REGISTER 1 (ACCESS F88h)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
SSCON1 SSCON0 TXINC RXINC DUPLEX1 DUPLEX0 DLYINTEN DMAEN
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-6 SSCON<1:0>: SSDMA Output Control bits (Master modes only)
11 = SSDMA is asserted for the duration of 4 bytes; DLYINTEN is always reset low
01 = SSDMA is asserted for the duration of 2 bytes; DLYINTEN is always reset low
10 = SSDMA is asserted for the duration of 1 byte; DLYINTEN is always reset low
00 = SSDMA is not controlled by the DMA module; the DLYINTEN bit is software programmable
bit 5 TXINC: Transmit Address Increment Enable bit
Allows the transmit address to increment as the transfer progresses.
1 = The transmit address is to be incremented from the initial value of TXADDR<11:0>
0 = The transmit address is always set to the initial value of TXADDR<11:0>
bit 4 RXINC: Receive Address Increment Enable bit
Allows the receive address to increment as the transfer progresses.
1 = The received address is to be incremented from the intial value of RXADDR<11:0>
0 = The received address is always set to the initial value of RXADDR<11:0>
bit 3-2 DUPLEX<1:0>: Transmit/Receive Operating Mode Select bits
10 = SPI DMA operates in Full-Duplex mode; data is simultaneously transmitted and received
01 = DMA operates in Half-Duplex mode; data is transmitted only
00 = DMA operates in Half-Duplex mode; data is received only
bit 1 DLYINTEN: Delay Interrupt Enable bit
Enables the interrupt to be invoked after the number of T
CY cycles specified in DLYCYC<2:0> has
elapsed from the latest completed transfer.
1 = The interrupt is enabled; SSCON<1:0> must be set to ‘00’
0 = The interrupt is disabled
bit 0 DMAEN: DMA Operation Start/Stop bit
This bit is set by the users’ software to start the DMA operation. It is reset back to zero by the DMA
engine when the DMA operation is completed or aborted.
1 = DMA is in session
0 = DMA is not in session
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20.4.4.2 DMACON2
The DMACON2 register contains control bits for
controlling interrupt generation and inter-byte delay
behavior. The INTLVL<3:0> bits are used to select when
an SSP2IF interrupt should be generated. The function
of the DLYCYC<3:0> bits depends on the SPI operating
mode (Master/Slave), as well as the DLYINTEN setting.
In SPI Master mode, the DLYCYC<3:0> bits can be used
to control how much time the module will Idle between
bytes in a transfer. By default, the hardware requires a
minimum delay of 8 T
CY for FOSC/4, 9 TCY for FOSC/16
and 15 TCY for FOSC/64. An additional delay can be
added with the DLYCYC bits. In SPI Slave modes, the
DLYCYC<3:0> bits may optionally be used to trigger an
additional time-out based interrupt.
REGISTER 20-4: DMACON2: DMA CONTROL REGISTER 2 (ACCESS F86h)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
DLYCYC3 DLYCYC2 DLYCYC1 DLYCYC0 INTLVL3 INTLVL2 INTLVL1 INTLVL0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-4 DLYCYC<3:0>: Delay Cycle Selection bits
When DLYINTEN = 0, these bits specify the additional delay (above the base overhead of the hard-
ware) in number of TCY cycles before the SSP2BUF register is written again for the next transfer. When
DLYINTEN = 1, these bits specify the delay in number of TCY cycles from the latest completed transfer
before an interrupt to the CPU is invoked. In this case, the additional delay before the SSP2BUF
register is written again is 1 T
CY + (base overhead of hardware).
1111 = Delay time in number of instruction cycles is 2,048 cycles
1110 = Delay time in number of instruction cycles is 1,024 cycles
1101 = Delay time in number of instruction cycles is 896 cycles
1100 = Delay time in number of instruction cycles is 768 cycles
1011 = Delay time in number of instruction cycles is 640 cycles
1010 = Delay time in number of instruction cycles is 512 cycles
1001 = Delay time in number of instruction cycles is 384 cycles
1000 = Delay time in number of instruction cycles is 256 cycles
0111 = Delay time in number of instruction cycles is 128 cycles
0110 = Delay time in number of instruction cycles is 64 cycles
0101 = Delay time in number of instruction cycles is 32 cycles
0100 = Delay time in number of instruction cycles is 16 cycles
0011 = Delay time in number of instruction cycles is 8 cycles
0010 = Delay time in number of instruction cycles is 4 cycles
0001 = Delay time in number of instruction cycles is 2 cycles
0000 = Delay time in number of instruction cycles is 1 cycle
bit 3-0 INTLVL<3:0>: Watermark Interrupt Enable bits
These bits specify the amount of remaining data yet to be transferred (transmitted and/or received)
upon which an interrupt is generated.
1111 = Amount of remaining data to be transferred is 576 bytes
1110 = Amount of remaining data to be transferred is 512 bytes
1101 = Amount of remaining data to be transferred is 448 bytes
1100 = Amount of remaining data to be transferred is 384 bytes
1011 = Amount of remaining data to be transferred is 320 bytes
1010 = Amount of remaining data to be transferred is 256 bytes
1001 = Amount of remaining data to be transferred is 192 bytes
1000 = Amount of remaining data to be transferred is 128 bytes
0111 = Amount of remaining data to be transferred is 67 bytes
0110 = Amount of remaining data to be transferred is 32 bytes
0101 = Amount of remaining data to be transferred is 16 bytes
0100 = Amount of remaining data to be transferred is 8 bytes
0011 = Amount of remaining data to be transferred is 4 bytes
0010 = Amount of remaining data to be transferred is 2 bytes
0001 = Amount of remaining data to be transferred is 1 byte
0000 = Transfer complete
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20.4.4.3 DMABCH and DMABCL
The DMABCH and DMABCL register pair forms a 10-bit
Byte Count register, which is used by the SPI DMA
module to send/receive up to 1,024 bytes for each DMA
transaction. When the DMA module is actively running
(DMAEN = 1), the DMA Byte Count register decrements
after each byte is transmitted/received. The DMA trans-
action will Halt and the DMAEN bit will be automatically
cleared by hardware after the last byte has completed.
After a DMA transaction is complete, the DMABC
register will read 0x000.
Prior to initiating a DMA transaction by setting the
DMAEN bit, user firmware should load the appropriate
value into the DMABCH/DMABCL registers. The
DMABC is a “base zero” counter, so the actual number
of bytes which will be transmitted follows in
Equation 20-1.
For example, if user firmware wants to transmit 7 bytes
in one transaction, DMABC should be loaded with
006h. Similarly, if user firmware wishes to transmit
1,024 bytes, DMABC should be loaded with 3FFh.
EQUATION 20-1: BYTES TRANSMITTED
FOR A GIVEN DMABC
20.4.4.4 TXADDRH and TXADDRL
The TXADDRH and TXADDRL registers pair together
to form a 12-bit Transmit Source Address Pointer
register. In modes that use TXADDR (Full-Duplex and
Half-Duplex Transmit), the TXADDR will be incre-
mented after each byte is transmitted. Transmitted data
bytes will be taken from the memory location pointed to
by the TXADDR register. The contents of the memory
locations pointed to by TXADDR will not be modified by
the DMA module during a transmission.
The SPI DMA module can read from, and transmit data
from, all general purpose memory on the device. The
SPI DMA module cannot be used to read from the
Special Function Registers (SFRs) contained in Banks
14 and 15.
20.4.4.5 RXADDRH and RXADDRL
The RXADDRH and RXADDRL registers pair together
to form a 12-bit Receive Destination Address Pointer.
In modes that use RXADDR (Full-Duplex and
Half-Duplex Receive), the RXADDR register will be
incremented after each byte is received. Received data
bytes will be stored at the memory location pointed to
by the RXADDR register.
The SPI DMA module can write received data to all
general purpose memory on the device. The SPI DMA
module cannot be used to modify the Special Function
Registers contained in Banks 14 and 15.
20.4.5 INTERRUPTS
The SPI DMA module alters the behavior of the SSP2IF
interrupt flag. In normal non-DMA modes, the SSP2IF is
set once after every single byte is transmitted/received
through the MSSP2 module. When MSSP2 is used with
the SPI DMA module, the SSP2IF interrupt flag will be
set according to the user-selected INTLVL<3:0> value
specified in the DMACON2 register. The SSP2IF inter-
rupt condition will also be generated once the SPI DMA
transaction has fully completed and the DMAEN bit has
been cleared by hardware.
The SSP2IF flag becomes set once the DMA byte count
value indicates that the specified INTLVL has been
reached. For example, if DMACON2<3:0> = 0101
(16 bytes remaining), the SSP2IF interrupt flag will
become set once DMABC reaches 00Fh. If user
firmware then clears the SSP2IF interrupt flag, the flag
will not be set again by the hardware until after all bytes
have been fully transmitted and the DMA transaction is
complete.
For example, if DMABC = 00Fh (implying 16 bytes are
remaining) and user firmware writes ‘1111’ to
INTLVL<3:0> (interrupt when 576 bytes remaining),
the SSP2IF interrupt flag will immediately become set.
If user firmware clears this interrupt flag, a new inter-
rupt condition will not be generated until either: user
firmware again writes INTLVL with an interrupt level
higher than the actual remaining level, or the DMA
transaction completes and the DMAEN bit is cleared.
BytesXMIT DMABC 1+
Note: User firmware may modify the INTLVL bits
while a DMA transaction is in progress
(DMAEN = 1). If an INTLVL value is
selected which is higher than the actual
remaining number of bytes (indicated by
DMABC + 1), the SSP2IF interrupt flag
will immediately become set.
Note: If the INTLVL bits are modified while a
DMA transaction is in progress, care
should be taken to avoid inadvertently
changing the DLYCYC<3:0> value.
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20.4.6 USING THE SPI DMA MODULE
The following steps would typically be taken to enable
and use the SPI DMA module:
1. Configure the I/O pins, which will be used by
MSSP2.
a) Assign SCK2, SDO2, SDI2 and SS2 to the
RPn pins as appropriate for the SPI mode
which will be used. Only functions which will
be used need to be assigned to a pin.
b) Initialize the associated LAT registers for
the desired Idle SPI bus state.
c) If Open-Drain Output mode on SDO2 and
SCK2 (Master mode) is desired, set
ODCON3<1>.
d) Configure the corresponding TRIS bits for
each I/O pin used.
2. Configure and enable MSSP2 for the desired
SPI operating mode.
a) Select the desired operating mode (Master
or Slave, SPI Mode 0, 1, 2 and 3) and
configure the module by writing to the
SSP2STAT and SSP2CON1 registers.
b) Enable MSSP2 by setting SSP2CON1<5> = 1.
3. Configure the SPI DMA engine.
a) Select the desired operating mode by
writing the appropriate values to
DMACON2 and DMACON1.
b) Initialize the TXADDRH/TXADDRL Pointer
(Full-Duplex or Half-Duplex Transmit Only
mode).
c) Initialize the RXADDRH/RXADDRL Pointer
(Full-Duplex or Half-Duplex Receive Only
mode).
d) Initialize the DMABCH/DMABCL Byte Count
register with the number of bytes to be
transferred in the next SPI DMA operation.
e) Set the DMAEN bit (DMACON1<0>).
In SPI Master modes, this will initiate a DMA
transaction. In SPI Slave modes, this will
complete the initialization process, and the
module will now be ready to begin receiving
and/or transmitting data to the master
device once the master starts the
transaction.
4. Detect the SSP2IF interrupt condition (PIR3<7).
a) If the interrupt was configured to occur at
the completion of the SPI DMA transaction,
the DMAEN bit (DMACON1<0>) will be
clear. User firmware may prepare the
module for another transaction by repeating
Steps 3.b through 3.e.
b) If the interrupt was configured to occur prior
to the completion of the SPI DMA trans-
action, the DMAEN bit may still be set,
indicating the transaction is still in progress.
User firmware would typically use this inter-
rupt condition to begin preparing new data
for the next DMA transaction. Firmware
should not repeat Steps 3.b. through 3.e.
until the DMAEN bit is cleared by the
hardware, indicating the transaction is
complete.
Example 20-2 provides example code demonstrating
the initialization process and the steps needed to use
the SPI DMA module to perform a 512-byte Full-Duplex
Master mode transfer.
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EXAMPLE 20-2: 512-BYTE SPI MASTER MODE Init AND TRANSFER
;For this example, let's use RP5(RB2) for SCK2,
;RP4(RB1) for SDO2, and RP3(RB0) for SDI2
;Let’s use SPI master mode, CKE = 0, CKP = 0,
;without using slave select signalling.
InitSPIPins:
movlb 0x0F ;Select bank 15, for access to ODCON3 register
bcf ODCON3, SPI2OD ;Let’s not use open drain outputs in this example
bcf LATB, RB2 ;Initialize our (to be) SCK2 pin low (idle).
bcf LATB, RB1 ;Initialize our (to be) SDO2 pin to an idle state
bcf TRISB, RB1 ;Make SDO2 output, and drive low
bcf TRISB, RB2 ;Make SCK2 output, and drive low (idle state)
bsf TRISB, RB0 ;SDI2 is an input, make sure it is tri-stated
;Now we should unlock the PPS registers, so we can
;assign the MSSP2 functions to our desired I/O pins.
movlb 0x0E ;Select bank 14 for access to PPS registers
bcf INTCON, GIE ;I/O Pin unlock sequence will not work if CPU
;services an interrupt during the sequence
movlw 0x55 ;Unlock sequence consists of writing 0x55
movwf EECON2 ;and 0xAA to the EECON2 register.
movlw 0xAA
movwf EECON2
bcf PPSCON, IOLOCK ;We may now write to RPINRx and RPORx registers
bsf INTCON, GIE ;May now turn back on interrupts if desired
movlw 0x03 ;RP3 will be SDI2
movwf RPINR21 ;Assign the SDI2 function to pin RP3
movlw 0x0A ;Let’s assign SCK2 output to pin RP4
movwf RPOR4 ;RPOR4 maps output signals to RP4 pin
movlw 0x04 ;SCK2 als o needs to be conf igured as an input on the
same pin
movwf RPINR22 ;SCK2 input function taken from RP4 pin
movlw 0x09 ;0x09 is SDO2 output
movwf RPOR5 ;Assign SDO2 output signal to the RP5 (RB2) pin
movlb 0x0F ;Done with PPS registers, bank 15 has other SFRs
InitMSSP2:
clrf SSP2STAT ;CKE = 0, SMP = 0 (sampled at middle of bit)
movlw b'00000000' ;CKP = 0, SPI Master mode, Fosc/4
movwf SSP2CON1 ;MSSP2 initialized
bsf SSP2CON1, SSPEN ;Enable the MSSP2 module
InitSPIDMA:
movlw b'00111010' ;Full duplex, RX/TXINC enabled, no SSCON
movwf DMACON1 ;DLYINTEN is set, so DLYCYC3:DLYCYC0 = 1111
movlw b'11110000' ;Minimum delay between bytes, interrupt
movwf DMACON2 ;only once when the transaction is complete
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;Somewhere else in our project, lets assume we have
;allocated some RAM for use as SPI receive and
;transmit buffers.
; udata 0x500
;DestBuf res 0x200 ;Let’s reserve 0x500-0x6FF for use as our SPI
; ;receive data buffer in this example
;SrcBuf res 0x200 ;Lets reserve 0x700-0x8FF for use as our SPI
; ;transmit data buffer in this example
PrepareTransfer:
movlw HIGH(DestBuf) ;Get high byte of DestBuf address (0x05)
movwf RXADDRH ;Load upper four bits of the RXADDR register
movlw LOW(DestBuf) ;Get low byte of the DestBuf address (0x00)
movwf RXADDRL ;Load lower eight bits of the RXADDR register
movlw HIGH(SrcBuf) ;Get high byte of SrcBuf address (0x07)
movwf TXADDRH ;Load upper four bits of the TXADDR register
movlw LOW(SrcBuf) ;Get low byte of the SrcBuf address (0x00)
movwf TXADDRL ;Load lower eight bits of the TXADDR register
movlw 0x01 ;Lets move 0x200 (512) bytes in one DMA xfer
movwf DMABCH ;Load the upper two bits of DMABC register
movlw 0xFF ;Actual bytes transferred is (DMABC + 1), so
movwf DMABCL ;we load 0x01FF into DMABC to xfer 0x200 bytes
BeginXfer:
bsf DMACON1, DMAEN ;The SPI DMA module will now begin transferring
;the data taken from SrcBuf, and will store
;received bytes into DestBuf.
;Execute whatever ;CPU is now free to do whatever it wants to
;and the DMA operation will continue without
;intervention, until it completes.
;When the transfer is complete, the SSP2IF flag in
;the PIR3 register will become set, and the DMAEN bit
;is automatically cleared by the hardware.
;The DestBuf (0x500-0x7FF) will contain the received
;data. To start another transfer, firmware wil l need
;to reinitialize RXADDR, TXADDR, DMABC and then
;set the DMAEN bit.
EXAMPLE 20-2: 512-BYTE SPI MASTER MODE Init AND TRANSFER (CONTINUED)
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DS39974A-page 310 Preliminary 2010 Microchip Technology Inc.
20.5 I2C Mode
The MSSP module in I2C mode fully implements all
master and slave functions (including general call
support), and provides interrupts on Start and Stop bits
in hardware to determine a free bus (multi-master
function). The MSSP module implements the standard
mode specifications and 7-bit and 10-bit addressing.
Two pins are used for data transfer:
• Serial Clock (SCLx) – RC3/SCK1/SCL1/RP14,
RD0/PMD0/SCL2 (44-pin devices) or
RB4/CCP4/PMA1/KBI0/SCL2/RP7
(28-pin devices)
• Serial Data (SDAx) – RC4/SDI1/SDA1/RP15,
RD1/PMD1/SDA2 (44-pin devices) or
RB5/CCP5/KBI1/SDA2/RP8 (28-pin devices)
The user must configure these pins as inputs by setting
the associated TRISx bits. These pins are up to 5.5V
tolerant, allowing direct use in I2C busses operating at
voltages higher than VDD.
FIGUR E 20 - 7 : M SSPx BLOCK DIAGRAM
(I2C™ MODE)
20.5.1 REGISTERS
The MSSP module has six registers for I2C operation.
These are:
• MSSPx Control Register 1 (SSPxCON1)
• MSSPx Control Register 2 (SSPxCON2)
• MSSPx Status Register (SSPxSTAT)
• Serial Receive/Transmit Buffer Register
(SSPxBUF)
• MSSPx Shift Register (SSPxSR) – Not directly
accessible
• MSSPx Address Register (SSPxADD)
• MSSPx 7-Bit Address Mask Register (SSPxMSK)
SSPxCON1, SSPxCON2 and SSPxSTAT are the
control and status registers in I2C mode operation. The
SSPxCON1 and SSPxCON2 registers are readable and
writable. The lower six bits of the SSPxSTAT are
read-only. The upper two bits of the SSPxSTAT are
read/write.
SSPxSR is the shift register used for shifting data in or
out. SSPxBUF is the buffer register to which data
bytes are written to or read from.
SSPxADD contains the slave device address when the
MSSP is configured in I2C Slave mode. When the
MSSP is configured in Master mode, the lower seven
bits of SSPxADD act as the Baud Rate Generator
(BRG) reload value.
SSPxMSK holds the slave address mask value when
the module is configured for 7-Bit Address Masking
mode. While it is a separate register, it shares the same
SFR address as SSPxADD; it is only accessible when
the SSPM<3:0> bits are specifically set to permit
access. Additional details are provided in
Section 20.5.3.4 “7-Bit Address Masking Mode”.
In receive operations, SSPxSR and SSPxBUF
together, create a double-buffered receiver. When
SSPxSR receives a complete byte, it is transferred to
SSPxBUF and the SSPxIF interrupt is set.
During transmission, the SSPxBUF is not
double-buffered. A write to SSPxBUF will write to both
SSPxBUF and SSPxSR.
Read Write
SSPxSR reg
Match Detect
SSPxADD reg
SSPxBUF reg
Internal
Data Bus
Addr Match
Set, Reset
S, P bits
(SSPxSTAT reg)
Shift
Clock
MSb LSb
Note: Only port I/O names are used in this diagram for
the sake of brevity. Refer to the text for a full list of
multiplexed functions.
SCLx
SDAx
Start and
Stop bit Detect
Address Mask
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REGISTER 20-5: SSPxSTAT: MSSPx STATUS REGIS TER (I2C™ MODE) (1, ACCESS FC7h; 2, F73h)
R/W-1 R/W-1 R-1 R-1 R-1 R-1 R-1 R-1
SMP CKE D/A P(1) S(1) R/W(2,3) UA BF
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 SMP: Slew Rate Control bit
In Master or Slave mode:
1 = Slew rate control is disabled for Standard Speed mode (100 kHz and 1 MHz)
0 = Slew rate control is enabled for High-Speed mode (400 kHz)
bit 6 CKE: SMBus Select bit
In Master or Slave mode:
1 = Enable SMBus specific inputs
0 = Disable SMBus specific inputs
bit 5 D/A: Data/Address bit
In Master mode:
Reserved.
In Slave mode:
1 = Indicates that the last byte received or transmitted was data
0 = Indicates that the last byte received or transmitted was address
bit 4 P: Stop bit(1)
1 = Indicates that a Stop bit has been detected last
0 = Stop bit was not detected last
bit 3 S: Start bit(1)
1 = Indicates that a Start bit has been detected last
0 = Start bit was not detected last
bit 2 R/W: Read/Write Information bit(2,3)
In Slave mode:
1 = Read
0 = Write
In Master mode:
1 = Transmit is in progress
0 = Transmit is not in progress
bit 1 UA: Update Address bit (10-Bit Slave mode only)
1 = Indicates that the user needs to update the address in the SSPxADD register
0 = Address does not need to be updated
bit 0 BF: Buffer Full Status bit
In Transmit mode:
1 = SSPxBUF is full
0 = SSPxBUF is empty
In Receive mode:
1 = SSPxBUF is full (does not include the ACK and Stop bits)
0 = SSPxBUF is empty (does not include the ACK and Stop bits)
Note 1: This bit is cleared on Reset and when SSPEN is cleared.
2: This bit holds the R/W bit information following the last address match. This bit is only valid from the
address match to the next Start bit, Stop bit or not ACK bit.
3: ORing this bit with SEN, RSEN, PEN, RCEN or ACKEN will indicate if the MSSPx is in Active mode.
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REGISTER 20-6: SSPxCON1: MSSPx C ONTROL REGIS TER 1 (I2C™ MODE)
(1, ACCESS FC6h; 2, F73h)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
WCOL SSPOV SSPEN(1) CKP SSPM3(2) SSPM2(2) SSPM1(2) SSPM0(2)
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 WCOL: Write Collision Detect bit
In Master Transmit mode:
1 = A write to the SSPxBUF register was attempted while the I2C conditions were not valid for a
transmission to be started (must be cleared in software)
0 = No collision
In Slave Transmit mode:
1 = The SSPxBUF register is written while it is still transmitting the previous word (must be cleared in
software)
0 = No collision
In Receive mode (Master or Slave modes):
This is a “don’t care” bit.
bit 6 SSPOV: Receive Overflow Indicator bit
In Receive mode:
1 = A byte is received while the SSPxBUF register is still holding the previous byte (must be cleared in
software)
0 = No overflow
In Transmit mode:
This is a “don’t care” bit in Transmit mode.
bit 5 SSPEN: Master Synchronous Serial Port Enable bit(1)
1 = Enables the serial port and configures the SDAx and SCLx pins as the serial port pins
0 = Disables the serial port and configures these pins as I/O port pins
bit 4 CKP: SCKx Release Control bit
In Slave mode:
1 = Releases clock
0 = Holds clock low (clock stretch); used to ensure data setup time
In Master mode:
Unused in this mode.
bit 3-0 SSPM<3:0>: Master Synchronous Serial Port Mode Select bits(2)
1111 = I2C Slave mode, 10-bit address with Start and Stop bit interrupts enabled
1110 = I2C Slave mode, 7-bit address with Start and Stop bit interrupts enabled
1011 = I2C Firmware Controlled Master mode (slave Idle)
1001 = Load the SSPxMSK register at the SSPxADD SFR address(3,4)
1000 = I2C Master mode, clock = FOSC/(4 * (SSPxADD + 1))
0111 = I2C Slave mode, 10-bit address
0110 = I2C Slave mode, 7-bit address
Note 1: When enabled, the SDAx and SCLx pins must be configured as inputs.
2: Bit combinations not specifically listed here are either reserved or implemented in SPI mode only.
3: When SSPM<3:0> = 1001, any reads or writes to the SSPxADD SFR address actually accesses the
SSPxMSK register.
4: This mode is only available when 7-Bit Address Masking mode is selected (MSSPMSK Configuration bit is ‘1’).
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REGISTER 20-7: SSPxCON2: MSSPx CONTROL REGISTER 2 (I2C™ MASTER MODE)
(1, ACCESS FC5h; 2, F71h)
R/W-0 R-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
GCEN(3) ACKSTAT ACKDT(1) ACKEN(2) RCEN(2) PEN(2) RSEN(2) SEN(2)
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 GCEN: General Call Enable bit (Slave mode only)(3)
1 = Enables interrupt when a general call address (0000h) is received in the SSPxSR
0 = General call address is disabled
bit 6 ACKSTAT: Acknowledge Status bit (Master Transmit mode only)
1 = Acknowledge was not received from slave
0 = Acknowledge was received from slave
bit 5 ACKDT: Acknowledge Data bit (Master Receive mode only)(1)
1 = Not Acknowledge
0 = Acknowledge
bit 4 ACKEN: Acknowledge Sequence Enable bit(2)
1 = Initiates Acknowledge sequence on SDAx and SCLx pins, and transmits ACKDT data bit;
automatically cleared by hardware
0 = Acknowledge sequence Idle
bit 3 RCEN: Receive Enable bit (Master Receive mode only)(2)
1 = Enables Receive mode for I2C
0 = Receive is Idle
bit 2 PEN: Stop Condition Enable bit(2)
1 = Initiates Stop condition on SDAx and SCLx pins; automatically cleared by hardware
0 = Stop condition is Idle
bit 1 RSEN: Repeated Start Condition Enable bit(2)
1 = Initiates Repeated Start condition on SDAx and SCLx pins; automatically cleared by hardware
0 = Repeated Start condition is Idle
bit 0 SEN: Start Condition Enable bit(2)
1 = Initiates Start condition on SDAx and SCLx pins; automatically cleared by hardware
0 = Start condition is Idle
Note 1: Value that will be transmitted when the user initiates an Acknowledge sequence at the end of a receive.
2: If the I2C module is active, these bits may not be set (no spooling) and the SSPxBUF may not be written
(or writes to the SSPxBUF are disabled).
3: This bit is not implemented in I2C Master mode.
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REGISTER 20-9: SSPxMSK: I2C™ SLAVE ADDRESS MASK REGISTER (7-BIT MASKING MODE)
(1, ACCESS F C8h; 2, F74 h )(1)
REGISTER 20-8: SSPxCON2: MSSPx CONTROL REGISTER 2 (I2C™ SLAVE MODE)
(1, ACCESS FC5h; 2, F71h)
R/W-0 R-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
GCEN ACKSTAT(2) ADMSK5 ADMSK4 ADMSK3 ADMSK2 ADMSK1 SEN(1)
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 GCEN: General Call Enable bit (Slave mode only)
1 = Enables interrupt when a general call address (0000h) is received in the SSPxSR
0 = General call address disabled
bit 6 ACKSTAT: Acknowledge Status bit(2)
Unused in Slave mode.
bit 5-2 ADMSK<5:2>: Slave Address Mask Select bits (5-bit address masking)
1 = Masking of the corresponding bits of SSPxADD is enabled
0 = Masking of the corresponding bits of SSPxADD is disabled
bit 1 ADMSK1: Slave Address Least Significant bit(s) Mask Select bit
In 7-Bit Addressing mode:
1 = Masking of SSPxADD<1> only is enabled
0 = Masking of SSPxADD<1> only is disabled
In 10-Bit Addressing mode:
1 = Masking of SSPxADD<1:0> is enabled
0 = Masking of SSPxADD<1:0> is disabled
bit 0 SEN: Start Condition Enable/Stretch Enable bit(1)
1 = Clock stretching is enabled for both slave transmit and slave receive (stretch enabled)
0 = Clock stretching is disabled
Note 1: If the I2C module is active, these bits may not be set (no spooling) and the SSPxBUF may not be written
(or writes to the SSPxBUF are disabled).
2: This bit is unimplemented in I2C Slave mode.
R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
MSK7 MSK6 MSK5 MSK4 MSK3 MSK2 MSK1 MSK0(2)
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-0 MSK<7:0>: Slave Address Mask Select bits
1 = Masking of the corresponding bit of SSPxADD is enabled
0 = Masking of the corresponding bit of SSPxADD is disabled
Note 1: This register shares the same SFR address as SSPxADD and is only addressable in select MSSP
operating modes. See Section 20.5.3.4 “7-Bit Address Masking Mode” for more details.
2: MSK0 is not used as a mask bit in 7-bit addressing.
2010 Microchip Technology Inc. Preliminary DS39974A-page 315
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20.5.2 OPERATION
The MSSP module functions are enabled by setting the
MSSP Enable bit, SSPEN (SSPxCON1<5>).
The SSPxCON1 register allows control of the I2C
operation. Four mode selection bits (SSPxCON1<3:0>)
allow one of the following I2C modes to be selected:
•I
2C Master mode, clock
•I
2C Slave mode (7-bit address)
•I
2C Slave mode (10-bit address)
•I
2C Slave mode (7-bit address) with Start and
Stop bit interrupts enabled
•I
2C Slave mode (10-bit address) with Start and
Stop bit interrupts enabled
•I
2C Firmware Controlled Master mode,
slave is Idle
Selection of any I2C mode, with the SSPEN bit set,
forces the SCLx and SDAx pins to be open-drain,
provided these pins are programmed as inputs by
setting the appropriate TRISB or TRISD bits. To ensure
proper operation of the module, pull-up resistors must
be provided externally to the SCLx and SDAx pins.
20.5.3 SLAVE MODE
In Slave mode, the SCLx and SDAx pins must be
configured as inputs (TRISB<5:4> set). The MSSP
module will override the input state with the output data
when required (slave-transmitter).
The I2C Slave mode hardware will always generate an
interrupt on an address match. Address masking will
allow the hardware to generate an interrupt for more
than one address (up to 31 in 7-bit addressing and up
to 63 in 10-bit addressing). Through the mode select
bits, the user can also choose to interrupt on Start and
Stop bits.
When an address is matched, or the data transfer after
an address match is received, the hardware will auto-
matically generate the Acknowledge (ACK) pulse and
load the SSPxBUF register with the received value
currently in the SSPxSR register.
Any combination of the following conditions will cause
the MSSP module not to give this ACK pulse:
• The Buffer Full bit, BF (SSPxSTAT<0>), was set
before the transfer was received.
• The overflow bit, SSPOV (SSPxCON1<6>), was
set before the transfer was received.
In this case, the SSPxSR register value is not loaded
into the SSPxBUF, but bit, SSPxIF, is set. The BF bit is
cleared by reading the SSPxBUF register, while bit,
SSPOV, is cleared through software.
The SCLx clock input must have a minimum high and
low for proper operation. The high and low times of the
I2C specification, as well as the requirement of the
MSSP module, are shown in timing parameter 100 and
parameter 101.
20.5.3.1 Addressing
Once the MSSP module has been enabled, it waits for
a Start condition to occur. Following the Start condition,
the 8 bits are shifted into the SSPxSR register. All
incoming bits are sampled with the rising edge of the
clock (SCLx) line. The value of register, SSPxSR<7:1>,
is compared to the value of the SSPxADD register. The
address is compared on the falling edge of the eighth
clock (SCLx) pulse. If the addresses match and the BF
and SSPOV bits are clear, the following events occur:
1. The SSPxSR register value is loaded into the
SSPxBUF register.
2. The Buffer Full bit, BF, is set.
3. An ACK pulse is generated.
4. The MSSPx Interrupt Flag bit, SSPxIF, is set
(and an interrupt is generated, if enabled) on the
falling edge of the ninth SCLx pulse.
In 10-Bit Addressing mode, two address bytes need to
be received by the slave. The five Most Significant bits
(MSbs) of the first address byte specify if this is a 10-bit
address. Bit, R/W (SSPxSTAT<2>), must specify a
write so the slave device will receive the second
address byte. For a 10-bit address, the first byte would
equal ‘11110 A9 A8 0’, where ‘A9’ and ‘A8’ are the
two MSbs of the address. The sequence of events for
10-bit addressing is as follows, with Steps 7 through 9
for the slave-transmitter:
1. Receive the first (high) byte of address (bits,
SSPxIF, BF and UA, are set on an address
match).
2. Update the SSPxADD register with the second
(low) byte of the address (clears bit, UA, and
releases the SCLx line).
3. Read the SSPxBUF register (clears bit, BF) and
clear flag bit, SSPxIF.
4. Receive the second (low) byte of the address
(bits, SSPxIF, BF and UA, are set).
5. Update the SSPxADD register with the first
(high) byte of the address. If a match releases
the SCLx line, this will clear bit, UA.
6. Read the SSPxBUF register (clears bit, BF) and
clears flag bit, SSPxIF.
7. Receive Repeated Start condition.
8. Receive the first (high) byte of address (bits,
SSPxIF and BF, are set).
9. Read the SSPxBUF register (clears bit, BF) and
clear flag bit, SSPxIF.
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20.5.3.2 Address Masking Modes
Masking an address bit causes that bit to become a
“don’t care”. When one address bit is masked, two
addresses will be Acknowledged and cause an inter-
rupt. It is possible to mask more than one address bit at
a time, which greatly expands the number of addresses
Acknowledged.
The I2C slave behaves the same way, whether address
masking is used or not. However, when address mask-
ing is used, the I2C slave can Acknowledge multiple
addresses and cause interrupts. When this occurs, it is
necessary to determine which address caused the
interrupt by checking SSPxBUF.
The PIC18F47J13 family of devices is capable of using
two different Address Masking modes in I2C slave
operation: 5-Bit Address Masking and 7-Bit Address
Masking. The Masking mode is selected at device
configuration using the MSSPMSK Configuration bit.
The default device configuration is 7-Bit Address
Masking.
Both Masking modes, in turn, support address masking
of 7-bit and 10-bit addresses. The combination of
Masking modes and addresses provides different
ranges of Acknowledgable addresses for each
combination.
While both Masking modes function in roughly the
same manner, the way they use address masks is
different.
20.5.3.3 5-Bit Address Masking Mode
As the name implies, 5-Bit Address Masking mode uses
an address mask of up to five bits to create a range of
addresses to be Acknowledged, using Bits 5 through 1
of the incoming address. This allows the module to
Acknowledge up to 31 addresses when using 7-bit
addressing or 63 addresses with 10-bit addressing (see
Example 20-3). This Masking mode is selected when
the MSSPMSK Configuration bit is programmed (‘0’).
The address mask in this mode is stored in the
SSPxCON2 register, which stops functioning as a control
register in I2C Slave mode (Register 20-8). In 7-Bit
Address Masking mode, address mask bits,
ADMSK<5:1> (SSPxCON2<5:1>), mask the
corresponding address bits in the SSPxADD register. For
any ADMSK bits that are set (ADMSK<n> = 1), the cor-
responding address bit is ignored (SSPxADD<n> = x).
For the module to issue an address Acknowledge, it is
sufficient to match only on addresses that do not have an
active address mask.
In 10-Bit Address Masking mode, bits, ADMSK<5:2>,
mask the corresponding address bits in the SSPxADD
register. In addition, ADMSK1 simultaneously masks
the two LSbs of the address (SSPxADD<1:0>). For any
ADMSK bits that are active (ADMSK<n> = 1), the cor-
responding address bit is ignored (SPxADD<n> = x).
Also note, that although in 10-Bit Address Masking
mode, the upper address bits reuse part of the
SSPxADD register bits. The address mask bits do not
interact with those bits; they only affect the lower
address bits.
EXAMPLE 20-3: ADDRESS MASKING EXAMPLES IN 5-BIT MASKING MODE
Note 1: ADMSK1 masks the two Least Significant
bits of the address.
2: The two MSbs of the address are not
affected by address masking.
7-Bit Addressing:
SSPxADD<7:1>= A0h (1010000) (SSPxADD<0> is assumed to be ‘0’)
ADMSK<5:1> = 00111
Addresses Acknowledged: A0h, A2h, A4h, A6h, A8h, AAh, ACh, AEh
10-Bit Addressing :
SSPxADD<7:0> = A0h (10100000) (the two MSbs of the address are ignored in this example, since
they are not affected by masking)
ADMSK<5:1> = 00111
Addresses Acknowledged: A0h, A1h, A2h, A3h, A4h, A5h, A6h, A7h, A8h, A9h, AAh, ABh, ACh, ADh,
AEh, AFh
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20.5.3.4 7-Bit Address Masking Mode
Unlike 5-Bit Address Masking mode, 7-Bit Address
Masking mode uses a mask of up to eight bits (in 10-bit
addressing) to define a range of addresses than can be
Acknowledged, using the lowest bits of the incoming
address. This allows the module to Acknowledge up to
127 different addresses with 7-bit addressing, or
255 with 10-bit addressing (see Example 20-4). This
mode is the default configuration of the module and is
selected when MSSPMSK is unprogrammed (‘1’).
The address mask for 7-Bit Address Masking mode is
stored in the SSPxMSK register, instead of the
SSPxCON2 register. SSPxMSK is a separate, hard-
ware register within the module, but it is not directly
addressable. Instead, it shares an address in the SFR
space with the SSPxADD register. To access the
SSPxMSK register, it is necessary to select MSSP
mode, ‘1001’ (SSPCON1<3:0> = 1001), and then read
or write to the location of SSPxADD.
To use 7-Bit Address Masking mode, it is necessary to
initialize SSPxMSK with a value before selecting the
I2C Slave Addressing mode. Thus, the required
sequence of events is:
1. Select SSPxMSK Access mode
(SSPxCON2<3:0> = 1001).
2. Write the mask value to the appropriate
SSPxADD register address (FC8h for MSSP1,
F74h for MSSP2).
3. Set the appropriate I2C Slave mode
(SSPxCON2<3:0> = 0111 for 10-bit addressing,
0110 for 7-bit addressing).
Setting or clearing mask bits in SSPxMSK behaves in
the opposite manner of the ADMSK bits in 5-Bit
Address Masking mode. That is, clearing a bit in
SSPxMSK causes the corresponding address bit to be
masked; setting the bit requires a match in that
position. SSPxMSK resets to all ‘1’s upon any Reset
condition, and therefore, has no effect on the standard
MSSP operation until written with a mask value.
With 7-Bit Address Masking mode, the
SSPxMSK<7:1> bits mask the corresponding address
bits in the SSPxADD register. For any SSPxMSK bits
that are active (SSPxMSK<n> = 0), the corresponding
SSPxADD address bit is ignored (SSPxADD<n> = x).
For the module to issue an address Acknowledge, it is
sufficient to match only on addresses that do not have
an active address mask.
With 10-Bit Address Masking mode, SSPxMSK<7:0>
bits mask the corresponding address bits in the
SSPxADD register. For any SSPxMSK bits that are
active (= 0), the corresponding SSPxADD address bit
is ignored (SSPxADD<n> = x).
EXAMPLE 20-4: ADDRESS MASKING EXAMPLES IN 7-BIT MASKING MODE
Note: The two MSbs of the address are not
affected by address masking.
7-Bit Addressing:
SSPxADD<7:1>= 1010 000
SSPxMSK<7:1>= 1111 001
Addresses Acknowledged = ACh, A8h, A4h, A0h
10-Bit Addressing :
SSPxADD<7:0> = 1010 0000 (the two MSbs are ignored in this example since they are not affected)
SSPxMSK<5:1> = 1111 0011
Addresses Acknowledged = ACh, A8h, A4h, A0h
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DS39974A-page 318 Preliminary 2010 Microchip Technology Inc.
20.5.3.5 Reception
When the R/W bit of the address byte is clear and an
address match occurs, the R/W bit of the SSPxSTAT
register is cleared. The received address is loaded into
the SSPxBUF register and the SDAx line is held low
(ACK).
When the address byte overflow condition exists, then
the no Acknowledge (ACK) pulse is given. An overflow
condition is defined as either bit, BF (SSPxSTAT<0>),
is set or bit, SSPOV (SSPxCON1<6>), is set.
An MSSP interrupt is generated for each data transfer
byte. The interrupt flag bit, SSPxIF, must be cleared in
software. The SSPxSTAT register is used to determine
the status of the byte.
If SEN is enabled (SSPxCON2<0> = 1), SCLx will be
held low (clock stretch) following each data transfer.
The clock must be released by setting bit, CKP
(SSPxCON1<4>). See Section 20.5.4 “Clock
Stretching” for more details.
20.5.3.6 Transmission
When the R/W bit of the incoming address byte is set
and an address match occurs, the R/W bit of the
SSPxSTAT register is set. The received address is
loaded into the SSPxBUF register. The ACK pulse will
be sent on the ninth bit and pin, SCLx, is held low
regardless of SEN (see Section 20.5.4 “Clock
Stretching” for more details). By stretching the clock,
the master will be unable to assert another clock pulse
until the slave is done preparing the transmit data. The
transmit data must be loaded into the SSPxBUF regis-
ter, which also loads the SSPxSR register. Then, the
SCLx pin should be enabled by setting bit, CKP
(SSPxCON1<4>). The eight data bits are shifted out on
the falling edge of the SCLx input. This ensures that the
SDAx signal is valid during the SCLx high time
(Figure 20-10).
The ACK pulse from the master-receiver is latched on
the rising edge of the ninth SCLx input pulse. If the
SDAx line is high (not ACK), then the data transfer is
complete. In this case, when the ACK is latched by the
slave, the slave monitors for another occurrence of the
Start bit. If the SDAx line was low (ACK), the next trans-
mit data must be loaded into the SSPxBUF register.
Again, the SCLx pin must be enabled by setting bit,
CKP.
An MSSP interrupt is generated for each data transfer
byte. The SSPxIF bit must be cleared in software and
the SSPxSTAT register is used to determine the status
of the byte. The SSPxIF bit is set on the falling edge of
the ninth clock pulse.
2010 Microchip Technology Inc. Preliminary DS39974A-page 319
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FIGURE 20-8: I2C™ SLAVE MODE TIMING WITH SEN = 0 (RECEPTION, 7-BIT ADDRESS)
SDAx
SCLx
SSPxIF (PIR1<3> or PIR3<7>)
BF (SSPxSTAT<0>)
SSPOV (SSPxCON1<6>)
S1 234 567 89 1 2 34 5 67 89 1 2345 7 89 P
A7 A6 A5 A4 A3 A2 A1 D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D1 D0
ACK
Receiving Data
ACK
Receiving Data
R/W = 0
ACK
Receiving Address
Cleared in software
SSPxBUF is read
Bus master
terminates
transfer
SSPOV is set
because SSPxBUF is
still full. ACK is not sent.
D2
6
CKP (SSPxCON1<4>)
(CKP does not reset to ‘0’ when SEN = 0)
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DS39974A-page 320 Preliminary 2010 Microchip Technology Inc.
FIGURE 20-9: I2C™ SLAVE MODE TIMING WITH SEN = 0 AND ADMSK<5:1> = 01011
(RECEPTION, 7-BIT ADDRESS)(1)
SDAx
SCLx
SSPxIF (PIR1<3> or PIR3<7>)
BF (SSPxSTAT<0>)
SSPOV (SSPxCON1<6>)
S12345678912345678912345 789 P
A7 A6 A5 X A3 X X D7D6 D5D4D3D2D1 D0 D7D6D5D4D3 D1D0
ACK
Receiving Data
ACK
Receiving Data
R/W = 0
ACK
Receiving Address
Cleared in software
SSPxBUF is read
Bus master
terminates
transfer
SSPOV is set
because SSPxBUF is
still full. ACK is not sent.
D2
6
CKP (SSPxCON1<4>)
(CKP does not reset to ‘0’ when SEN = 0)
Note 1: In this example, an address equal to A7.A6.A5.X.A3.X.X will be Acknowledged and cause an interrupt.
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FIGURE 20 - 10: I2C™ SLAVE MODE TIMING (TRANSMISSION, 7-BIT ADDRESS)
SDAx
SCLx
SSPxIF (PIR1<3>)
BF (SSPxSTAT<0>)
A6 A5 A4 A3 A2 A1 D6 D5 D4 D3 D2 D1 D0
1 2 3 4 5 6 7 8 2 3 4 5 6 7 8 9
SSPxBUF is written in software
Cleared in software
Data in
sampled
S
ACK
Transmitting Data
R/W =
1
ACK
Receiving Address
A7 D7
9 1
D6 D5 D4 D3 D2 D1 D0
2 3 4 5 6 7 8 9
SSPxBUF is written in software
Cleared in software
From SSPxIF ISR
Transmitting Data
D7
1
CKP
P
ACK
CKP is set in software CKP is set in software
SCLx held low
while CPU
responds to SSPxIF
Clear by reading
From SSPxIF ISR
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DS39974A-page 322 Preliminary 2010 Microchip Technology Inc.
FIGURE 20-11: I2C™ SLAVE MODE TIMING WITH SEN = 0 AND ADMSK<5:1> = 01001
(RECEPTION, 10-BIT ADDRESS)(1,2)
SDAx
SCLx
SSPxIF (PIR1<3> or PIR3<7>)
BF (SSPxSTAT<0>)
S123456789 123456789 12345 789 P
1 1 1 1 0 A9 A8 A7 A6 A5 X A3 A2 X X D7 D6 D5 D4 D3 D1 D0
Receive Data Byte
ACK
R/W = 0
ACK
Receive First Byte of Address
Cleared in software
D2
6
Cleared in software
Receive Second Byte of Address
Cleared by hardware
when SSPxADD is updated
with low byte of address
UA (SSPxSTAT<1>)
Clock is held low until
update of SSPxADD has
taken place
UA is set indicating that
the SSPxADD needs to be
updated
UA is set indicating that
SSPxADD needs to be
updated
Cleared by hardware when
SSPxADD is updated with high
byte of address
SSPxBUF is written with
contents of SSPxSR
Dummy read of SSPxBUF
to clear BF flag
ACK
CKP (SSPxCON1<4>)
12345 789
D7 D6 D5 D4 D3 D1 D0
Receive Data Byte
Bus master
terminates
transfer
D2
6
ACK
Cleared in software Cleared in software
SSPOV (SSPxCON1<6>)
SSPOV is set
because SSPxBUF is
still full. ACK is not sent.
(CKP does not reset to ‘0’ when SEN = 0)
Clock is held low until
update of SSPxADD has
taken place
Note 1: In this example, an address equal to A9.A8.A7.A6.A5.X.A3.A2.X.X will be Acknowledged and cause an interrupt.
2: Note that the Most Significant bits of the address are not affected by the bit masking.
2010 Microchip Technology Inc. Preliminary DS39974A-page 323
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FIGURE 20 - 12: I2C™ SLAVE MODE TIMING WITH SEN = 0 (RECEPTION, 10-BIT ADDRESS)
SDAx
SCLx
SSPxIF (PIR1<3> or PIR3<7>)
BF (SSPxSTAT<0>)
S123456789 123456789 12345 789 P
1 1 1 1 0 A9 A8 A7 A6A5 A4A3A2A1 A0 D7 D6D5D4D3 D1D0
Receive Data Byte
ACK
R/W = 0
ACK
Receive First Byte of Address
Cleared in software
D2
6
Cleared in software
Receive Second Byte of Address
Cleared by hardware
when SSPxADD is updated
with low byte of address
UA (SSPxSTAT<1>)
Clock is held low until
update of SSPxADD has
taken place
UA is set indicating that
the SSPxADD needs to be
updated
UA is set indicating that
SSPxADD needs to be
updated
Cleared by hardware when
SSPxADD is updated with high
byte of address
SSPxBUF is written with
contents of SSPxSR
Dummy read of SSPxBUF
to clear BF flag
ACK
CKP (SSPxCON1<4>)
12345 789
D7 D6 D5 D4 D3 D1 D0
Receive Data Byte
Bus master
terminates
transfer
D2
6
ACK
Cleared in software Cleared in software
SSPOV (SSPxCON1<6>)
SSPOV is set
because SSPxBUF is
still full. ACK is not sent.
(CKP does not reset to ‘0’ when SEN = 0)
Clock is held low until
update of SSPxADD has
taken place
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DS39974A-page 324 Preliminary 2010 Microchip Technology Inc.
FIGURE 20 - 13: I2C™ SLAVE MODE TIMING (TRANSMISSION, 10-BIT ADDRESS)
SDAx
SCLx
SSPxIF (PIR1<3> or PIR3<7>)
BF (SSPxSTAT<0>)
S1234 5 6789 1 2345 678 9 12345 7 89 P
1 1 1 1 0 A9A8 A7 A6A5A4A3A2A1 A0 1 1 1 1 0 A8
R/W = 1
ACK
ACK
R/W = 0
ACK
Receive First Byte of Address
Cleared in software
Bus master
terminates
transfer
A9
6
Receive Second Byte of Address
Cleared by hardware when
SSPxADD is updated with low
byte of address
UA (SSPxSTAT<1>)
Clock is held low until
update of SSPxADD has
taken place
UA is set indicating that
the SSPxADD needs to be
updated
UA is set indicating that
SSPxADD needs to be
updated
Cleared by hardware when
SSPxADD is updated with high
byte of address.
SSPxBUF is written with
contents of SSPxSR
Dummy read of SSPxBUF
to clear BF flag
Receive First Byte of Address
12345 789
D7 D6 D5 D4 D3 D1
ACK
D2
6
Transmitting Data Byte
D0
Dummy read of SSPxBUF
to clear BF flag
Sr
Cleared in software
Write of SSPxBUF
initiates transmit
Cleared in software
Completion of
clears BF flag
CKP (SSPxCON1<4>)
CKP is set in software
CKP is automatically cleared in hardware, holding SCLx low
Clock is held low until
update of SSPxADD has
taken place
data transmission
Clock is held low until
CKP is set to ‘1’
third address sequence
BF flag is clear
at the end of the
2010 Microchip Technology Inc. Preliminary DS39974A-page 325
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20.5.4 CLOCK STRETCHING
Both 7-Bit and 10-Bit Slave modes implement
automatic clock stretching during a transmit sequence.
The SEN bit (SSPxCON2<0>) allows clock stretching
to be enabled during receives. Setting SEN will cause
the SCLx pin to be held low at the end of each data
receive sequence.
20.5.4.1 Clock Stretching for 7-Bit Slave
Receive Mode (SEN = 1)
In 7-Bit Slave Receive mode, on the falling edge of the
ninth clock at the end of the ACK sequence, if the BF
bit is set, the CKP bit in the SSPxCON1 register is
automatically cleared, forcing the SCLx output to be
held low. The CKP bit being cleared to ‘0’ will assert
the SCLx line low. The CKP bit must be set in the
user’s ISR before reception is allowed to continue. By
holding the SCLx line low, the user has time to service
the ISR and read the contents of the SSPxBUF before
the master device can initiate another receive
sequence. This will prevent buffer overruns from
occurring (see Figure 20-15).
20.5.4.2 Clock Stretching for 10-Bit Slave
Receive Mode (SEN = 1)
In 10-Bit Slave Receive mode, during the address
sequence, clock stretching automatically takes place
but CKP is not cleared. During this time, if the UA bit is
set after the ninth clock, clock stretching is initiated.
The UA bit is set after receiving the upper byte of the
10-bit address and following the receive of the second
byte of the 10-bit address with the R/W bit cleared to
‘0’. The release of the clock line occurs upon updating
SSPxADD. Clock stretching will occur on each data
receive sequence, as described in 7-bit mode.
20.5.4.3 Clock Stretching for 7-Bit Slave
Transmit Mode
The 7-Bit Slave Transmit mode implements clock
stretching by clearing the CKP bit, after the falling
edge of the ninth clock, if the BF bit is clear. This
occurs regardless of the state of the SEN bit.
The user’s Interrupt Service Routine (ISR) must set
the CKP bit before transmission is allowed to continue.
By holding the SCLx line low, the user has time to
service the ISR and load the contents of the SSPxBUF
before the master device can initiate another transmit
sequence (see Figure 20-10).
20.5.4.4 Clock Stretching for 10-Bit Slave
Transmit Mode
In 10-Bit Slave Transmit mode, clock stretching is
controlled during the first two address sequences by
the state of the UA bit, just as it is in 10-Bit Slave
Receive mode. The first two addresses are followed
by a third address sequence, which contains the
high-order bits of the 10-bit address and the R/W bit
set to ‘1’. After the third address sequence is
performed, the UA bit is not set, the module is now
configured in Transmit mode and clock stretching is
controlled by the BF flag as in 7-Bit Slave Transmit
mode (see Figure 20-13).
Note 1: If the user reads the contents of the
SSPxBUF before the falling edge of the
ninth clock, thus clearing the BF bit, the
CKP bit will not be cleared and clock
stretching will not occur.
2: The CKP bit can be set in software
regardless of the state of the BF bit. The
user should be careful to clear the BF bit
in the ISR before the next receive
sequence in order to prevent an overflow
condition.
Note: If the user polls the UA bit and clears it by
updating the SSPxADD register before the
falling edge of the ninth clock occurs, and
if the user has not cleared the BF bit by
reading the SSPxBUF register before that
time, then the CKP bit will still NOT be
asserted low. Clock stretching on the basis
of the state of the BF bit only occurs during
a data sequence, not an address
sequence.
Note 1: If the user loads the contents of
SSPxBUF, setting the BF bit before the
falling edge of the ninth clock, the CKP bit
will not be cleared and clock stretching
will not occur.
2: The CKP bit can be set in software
regardless of the state of the BF bit.
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20.5.4.5 Clock Synchronization and CKP bit
When the CKP bit is cleared, the SCLx output is forced
to ‘0’. However, clearing the CKP bit will not assert the
SCLx output low until the SCLx output is already
sampled low. Therefore, the CKP bit will not assert the
SCLx line until an external I2C master device has
already asserted the SCLx line. The SCLx output will
remain low until the CKP bit is set and all other
devices on the I2C bus have deasserted SCLx. This
ensures that a write to the CKP bit will not violate the
minimum high time requirement for SCLx (see
Figure 20-14).
FIGURE 20-14: CLOCK SYNCHRONIZATION TIMING
SDAx
SCLx
DX – 1
DX
WR
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
SSPxCON1
CKP
Master Device
Deasserts Clock
Master Device
Asserts Clock
2010 Microchip Technology Inc. Preliminary DS39974A-page 327
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FIGURE 20 - 15: I2C™ SLAVE MODE TIMING WITH SEN = 1 (RECEPTION, 7-BIT ADDRESS)
SDAx
SCLx
SSPxIF (PIR1<3> or PIR3<7>)
BF (SSPxSTAT<0>)
SSPOV (SSPxCON1<6>)
S1 234 56 789 1 2345 67 89 1 23 45 7 89 P
A7 A6 A5 A4 A3 A2 A1 D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D1 D0
ACK
Receiving Data
ACK
Receiving Data
R/W = 0
ACK
Receiving Address
Cleared in software
SSPxBUF is read
Bus master
terminates
transfer
SSPOV is set
because SSPxBUF is
still full. ACK is not sent.
D2
6
CKP (SSPxCON1<4>)
CKP
written
to ‘1’ in
If BF is cleared
prior to the falling
edge of the 9th clock,
CKP will not be reset
to ‘0’ and no clock
stretching will occur
software
Clock is held low until
CKP is set to ‘1’
Clock is not held low
because buffer full bit is
clear prior to falling edge
of 9th clock
Clock is not held low
because ACK =
1
BF is still set after falling
edge of the 9th clock,
CKP is reset to ‘0’ and
clock stretching occurs
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DS39974A-page 328 Preliminary 2010 Microchip Technology Inc.
FIGURE 20 - 16: I2C™ SLAVE MODE TIMING WITH SEN = 1 (RECEPTION, 10-BIT ADDRESS)
SDAx
SCLx
SSPxIF (PIR1<3> or PIR3<7>)
BF (SSPxSTAT<0>)
S123456 789 123456789 12345 789 P
1 1 1 1 0 A9A8 A7 A6 A5A4A3A2A1 A0 D7D6D5D4D3 D1D0
Receive Data Byte
ACK
R/W = 0
ACK
Receive First Byte of Address
Cleared in software
D2
6
Cleared in software
Receive Second Byte of Address
Cleared by hardware when
SSPxADD is updated with low
byte of address after falling edge
UA (SSPxSTAT<1>)
Clock is held low until
update of SSPxADD has
taken place
UA is set indicating that
the SSPxADD needs to be
updated
UA is set indicating that
SSPxADD needs to be
updated
Cleared by hardware when
SSPxADD is updated with high
byte of address after falling edge
SSPxBUF is written with
contents of SSPxSR Dummy read of SSPxBUF
to clear BF flag
ACK
CKP (SSPxCON1<4>)
12345 789
D7 D6 D5 D4 D3 D1 D0
Receive Data Byte
Bus master
terminates
transfer
D2
6
ACK
Cleared in software Cleared in software
SSPOV (SSPxCON1<6>)
CKP written to
‘
1
’
Note: An update of the SSPxADD register before
the falling edge of the ninth clock will have no
effect on UA and UA will remain set.
Note: An update of the SSPxADD
register before the falling
edge of the ninth clock will
have no effect on UA and
UA will remain set.
in software
Clock is held low until
update of SSPxADD has
taken place
of ninth clock
of ninth clock
SSPOV is set
because SSPxBUF is
still full. ACK is not sent.
Dummy read of SSPxBUF
to clear BF flag
Clock is held low until
CKP is set to
‘
1
’
Clock is not held low
because ACK =
1
2010 Microchip Technology Inc. Preliminary DS39974A-page 329
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20.5.5 GENERAL CALL ADDRESS
SUPPORT
The addressing procedure for the I2C bus is such that
the first byte after the Start condition usually
determines which device will be the slave addressed by
the master. The exception is the general call address,
which can address all devices. When this address is
used, all devices should, in theory, respond with an
Acknowledge.
The general call address is one of eight addresses
reserved for specific purposes by the I2C protocol. It
consists of all ‘0’s with R/W = 0.
The general call address is recognized when the
General Call Enable bit, GCEN, is enabled
(SSPxCON2<7> set). Following a Start bit detect, 8 bits
are shifted into the SSPxSR and the address is
compared against the SSPxADD. It is also compared to
the general call address and fixed in hardware.
If the general call address matches, the SSPxSR is
transferred to the SSPxBUF, the BF flag bit is set (eighth
bit), and on the falling edge of the ninth bit (ACK bit), the
SSPxIF interrupt flag bit is set.
When the interrupt is serviced, the source for the
interrupt can be checked by reading the contents of the
SSPxBUF. The value can be used to determine if the
address was device-specific or a general call address.
In 10-bit mode, the SSPxADD is required to be updated
for the second half of the address to match and the UA
bit is set (SSPxSTAT<1>). If the general call address is
sampled when the GCEN bit is set, while the slave is
configured in 10-Bit Addressing mode, then the second
half of the address is not necessary. The UA bit will not
be set and the slave will begin receiving data after the
Acknowledge (Figure 20-17).
FIGURE 20-17: SLAVE MODE GENERAL CALL ADDRESS SEQUENCE
(7-BIT OR 10-BIT ADDRESSING MODE)
20.5.6 MASTER MODE
Master mode is enabled by setting and clearing the
appropriate SSPM bits in SSPxCON1 and by setting
the SSPEN bit. In Master mode, the SCLx and SDAx
lines are manipulated by the MSSP hardware if the
TRISx bits are set.
Master mode of operation is supported by interrupt
generation on the detection of the Start and Stop con-
ditions. The Start (S) and Stop (P) bits are cleared from
a Reset or when the MSSP module is disabled. Control
of the I2C bus may be taken when the Stop bit is set, or
the bus is Idle, with both the Start and Stop bits clear.
In Firmware Controlled Master mode, user code
conducts all I2C bus operations based on Start and
Stop bit conditions.
Once Master mode is enabled, the user has six
options.
1. Assert a Start condition on SDAx and SCLx.
2. Assert a Repeated Start condition on SDAx and
SCLx.
3. Write to the SSPxBUF register initiating
transmission of data/address.
4. Configure the I2C port to receive data.
5. Generate an Acknowledge condition at the end
of a received byte of data.
6. Generate a Stop condition on SDAx and SCLx.
SDAx
SCLx
S
SSPxIF
BF (SSPxSTAT<0>)
SSPOV (SSPxCON1<6>)
Cleared in Software
SSPxBUF is Read
R/W = 0
ACK
General Call Address
Address is Compared to General Call Address
GCEN (SSPxCON2<7>)
Receiving Data ACK
123456789123456789
D7 D6 D5 D4 D3 D2 D1 D0
after ACK, Set Interrupt
‘0’
‘1’
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The following events will cause the MSSP Interrupt
Flag bit, SSPxIF, to be set (and MSSP interrupt, if
enabled):
• Start condition
• Stop condition
• Data transfer byte transmitted/received
• Acknowledge transmitted
• Repeated Start
FIGURE 20-18: MS SP x BLOCK DIAGRAM (I2C™ MASTER MODE)
Note: The MSSP module, when configured in
I2C Master mode, does not allow queueing
of events. For instance, the user is not
allowed to initiate a Start condition and
immediately write the SSPxBUF register to
initiate transmission before the Start
condition is complete. In this case, the
SSPxBUF will not be written to and the
WCOL bit will be set, indicating that a write
to the SSPxBUF did not occur.
Read Write
SSPxSR
Start bit, Stop bit,
SSPxBUF
Internal
Data Bus
Set/Reset S, P (SSPxSTAT), WCOL (SSPxCON1)
Shift
Clock
MSb LSb
SDAx
Acknowledge
Generate
Stop bit Detect
Write Collision Detect
Clock Arbitration
State Counter for
End of XMIT/RCV
SCLx
SCLx In
Bus Collision
SDAx In
Receive Enable
Clock Cntl
Clock Arbitrate/WCOL Detect
(hold off clock source)
SSPxADD<6:0>
Baud
Set SSPxIF, BCLxIF
Reset ACKSTAT, PEN (SSPxCON2)
Rate
Generator
SSPM<3:0>
Start bit Detect
2010 Microchip Technology Inc. Preliminary DS39974A-page 331
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20.5.6.1 I2C Master Mode Operation
The master device generates all of the serial clock
pulses and the Start and Stop conditions. A transfer is
ended with a Stop condition or with a Repeated Start
condition. Since the Repeated Start condition is also
the beginning of the next serial transfer, the I2C bus will
not be released.
In Master Transmitter mode, serial data is output
through SDAx while SCLx outputs the serial clock. The
first byte transmitted contains the slave address of the
receiving device (7 bits) and the Read/Write (R/W) bit.
In this case, the R/W bit will be logic ‘0’. Serial data is
transmitted, 8 bits at a time. After each byte is transmit-
ted, an Acknowledge bit is received. S and P conditions
are output to indicate the beginning and end of a serial
transfer.
In Master Receive mode, the first byte transmitted
contains the slave address of the transmitting device
(7 bits) and the R/W bit. In this case, the R/W bit will be
logic ‘1’. Thus, the first byte transmitted is a 7-bit slave
address, followed by a ‘1’ to indicate the receive bit.
Serial data is received via SDAx, while SCLx outputs
the serial clock. Serial data is received 8 bits at a time.
After each byte is received, an Acknowledge bit is
transmitted. S and P conditions indicate the beginning
and end of transmission.
The BRG used for the SPI mode operation is used to
set the SCLx clock frequency for either 100 kHz,
400 kHz or 1 MHz I2C operation. See Section 20.5.7
“Baud Rate” for more details.
A typical transmit sequence would go as follows:
1. The user generates a Start condition by setting
the Start Enable bit, SEN (SSPxCON2<0>).
2. SSPxIF is set. The MSSP module will wait for
the required start time before any other
operation takes place.
3. The user loads the SSPxBUF with the slave
address to transmit.
4. The address is shifted out of the SDAx pin until
all 8 bits are transmitted.
5. The MSSP module shifts in the ACK bit from the
slave device and writes its value into the
SSPxCON2 register (SSPxCON2<6>).
6. The MSSP module generates an interrupt at the
end of the ninth clock cycle by setting the
SSPxIF bit.
7. The user loads the SSPxBUF with 8 bits of data.
8. Data is shifted out of the SDAx pin until all 8 bits
are transmitted.
9. The MSSP module shifts in the ACK bit from the
slave device and writes its value into the
SSPxCON2 register (SSPxCON2<6>).
10. The MSSP module generates an interrupt at the
end of the ninth clock cycle by setting the
SSPxIF bit.
11. The user generates a Stop condition by setting
the Stop Enable bit, PEN (SSPxCON2<2>).
12. The interrupt is generated once the Stop
condition is complete.
20.5.7 BAUD RATE
In I2C Master mode, the BRG reload value is placed in
the lower seven bits of the SSPxADD register
(Figure 20-19). When a write occurs to SSPxBUF, the
Baud Rate Generator will automatically begin counting.
The BRG counts down to 0 and stops until another reload
has taken place. The BRG count is decremented twice
per instruction cycle (TCY) on the Q2 and Q4 clocks. In
I2C Master mode, the BRG is reloaded automatically.
Once the given operation is complete (i.e., transmis-
sion of the last data bit is followed by ACK), the internal
clock will automatically stop counting and the SCLx pin
will remain in its last state.
Table 20-3 demonstrates clock rates based on
instruction cycles and the BRG value loaded into
SSPxADD. The SSPADD BRG value of 0x00 is not
supported.
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20.5.7.1 Baud Rate and Module
Interdependence
Because MSSP1 and MSSP2 are independent, they
can operate simultaneously in I2C Master mode at
different baud rates. This is done by using different
BRG reload values for each module.
Because this mode derives its basic clock source from
the system clock, any changes to the clock will affect
both modules in the same proportion. It may be
possible to change one or both baud rates back to a
previous value by changing the BRG reload value.
FIGURE 20-19: BAUD RATE GENERATOR BLOCK DIAGRAM
TABLE 20-3: I2C™ CLOCK RATE w/BRG
FOSC FCY FCY * 2 BRG Value FSCL
(2 Rollovers of BRG)
40 MHz 10 MHz 20 MHz 18h 400 kHz
40 MHz 10 MHz 20 MHz 1Fh 312.5 kHz
40 MHz 10 MHz 20 MHz 63h 100 kHz
16 MHz 4 MHz 8 MHz 09h 400 kHz
16 MHz 4 MHz 8 MHz 0Ch 308 kHz
16 MHz 4 MHz 8 MHz 27h 100 kHz
4 MHz 1 MHz 2 MHz 02h 333 kHz
4 MHz 1 MHz 2 MHz 09h 100 kHz
16 MHz 4 MHz 8 MHz 03h 1 MHz(1)
Note 1: The I2C interface does not conform to the 400 kHz I2C specification (which applies to rates greater than
100 kHz) in all details, but may be used with care where higher rates are required by the application.
SSPM<3:0>
BRG Down Counter
CLKO FOSC/4
SSPxADD<6:0>
SSPM<3:0>
SCLx
Reload
Control
Reload
2010 Microchip Technology Inc. Preliminary DS39974A-page 333
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20.5.7.2 Clock Arbitration
Clock arbitration occurs when the master, during any
receive, transmit or Repeated Start/Stop condition,
deasserts the SCLx pin (SCLx allowed to float high).
When the SCLx pin is allowed to float high, the BRG is
suspended from counting until the SCLx pin is actually
sampled high. When the SCLx pin is sampled high, the
BRG is reloaded with the contents of SSPxADD<6:0>
and begins counting. This ensures that the SCLx high
time will always be at least one BRG rollover count in
the event that the clock is held low by an external
device (Figure 20-20).
FIGUR E 20-20: BAUD RATE GENERATOR TIMING WITH CLOCK ARBITRATION
20.5.8 I2C MASTER MODE START
CONDITION TIMING
To initiate a Start condition, the user sets the Start
Enable bit, SEN (SSPxCON2<0>). If the SDAx and
SCLx pins are sampled high, the BRG is reloaded with
the contents of SSPxADD<6:0> and starts its count. If
SCLx and SDAx are both sampled high when the Baud
Rate Generator times out (TBRG), the SDAx pin is
driven low. The action of the SDAx being driven low
while SCLx is high is the Start condition and causes the
Start bit (SSPxSTAT<3>) to be set. Following this, the
BRG is reloaded with the contents of SSPxADD<6:0>
and resumes its count. When the BRG times out
(TBRG), the SEN bit (SSPxCON2<0>) will be
automatically cleared by hardware. The BRG is
suspended, leaving the SDAx line held low and the Start
condition is complete.
20.5.8.1 WCOL Status Flag
If the user writes the SSPxBUF when a Start sequence
is in progress, the WCOL bit is set and the contents of
the buffer are unchanged (the write does not occur).
FIGURE 20-21: FIRST START BIT TIM ING
SDAx
SCLx
SCLx Deasserted but Slave Holds
DX – 1DX
BRG
SCLx is Sampled High, Reload takes
place and BRG Starts its Count
03h 02h 01h 00h (hold off) 03h 02h
Reload
BRG
Value
SCLx Low (clock arbitration)
SCLx Allowed to Transition High
BRG Decrements on
Q2 and Q4 Cycles
Note: If, at the beginning of the Start condition, the
SDAx and SCLx pins are already sampled
low, or if during the Start condition, the
SCLx line is sampled low before the SDAx
line is driven low, a bus collision occurs.
The Bus Collision Interrupt Flag, BCLxIF, is
set, the Start condition is aborted and the
I2C module is reset into its Idle state.
Note: Because queueing of events is not
allowed, writing to the lower five bits of
SSPxCON2 is disabled until the Start
condition is complete.
SDAx
SCLx
S
TBRG
1st bit 2nd bit
TBRG
SDAx = 1, At Completion of Start bit,
SCLx = 1
Write to SSPxBUF Occurs Here
TBRG
Hardware Clears SEN bit
TBRG
Write to SEN bit Occurs Here Set S bit (SSPxSTAT<3>)
and Sets SSPxIF bit
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DS39974A-page 334 Preliminary 2010 Microchip Technology Inc.
20.5.9 I2C MASTER MODE REPEATED
START CONDITION TIMING
A Repeated Start condition occurs when the RSEN bit
(SSPxCON2<1>) is programmed high and the I2C logic
module is in the Idle state. When the RSEN bit is set,
the SCLx pin is asserted low. When the SCLx pin is
sampled low, the BRG is loaded with the contents of
SSPxADD<5:0> and begins counting. The SDAx pin is
released (brought high) for one BRG count (TBRG).
When the BRG times out, and if SDAx is sampled high,
the SCLx pin will be deasserted (brought high). When
SCLx is sampled high, the BRG is reloaded with the
contents of SSPxADD<6:0> and begins counting.
SDAx and SCLx must be sampled high for one TBRG.
This action is then followed by assertion of the SDAx
pin (SDAx = 0) for one TBRG while SCLx is high.
Following this, the RSEN bit (SSPxCON2<1>) will be
automatically cleared and the BRG will not be
reloaded, leaving the SDAx pin held low. As soon as a
Start condition is detected on the SDAx and SCLx pins,
the Start bit (SSPxSTAT<3>) will be set. The SSPxIF bit
will not be set until the BRG has timed out.
Immediately following the SSPxIF bit getting set, the
user may write the SSPxBUF with the 7-bit address in
7-bit mode, or the default first address in 10-bit mode.
After the first eight bits are transmitted and an ACK is
received, the user may then transmit an additional 8 bits
of address (10-bit mode) or 8 bits of data (7-bit mode).
20.5.9.1 WCOL Status Flag
If the user writes the SSPxBUF when a Repeated Start
sequence is in progress, the WCOL is set and the
contents of the buffer are unchanged (the write does
not occur).
FIGURE 20-22 : REPEATED START CONDITION WAVEFORM
Note 1: If RSEN is programmed while any other
event is in progress, it will not take effect.
2: A bus collision during the Repeated Start
condition occurs if:
• SDAx is sampled low when SCLx
goes from low-to-high.
• SCLx goes low before SDAx is
asserted low. This may indicate that
another master is attempting to
transmit a data ‘1’.
Note: Because queueing of events is not
allowed, writing of the lower five bits of
SSPxCON2 is disabled until the Repeated
Start condition is complete.
SDAx
SCLx
Sr = Repeated Start
Write to SSPxCON2 Occurs Here:
Write to SSPxBUF Occurs Here
on Falling Edge of Ninth Clock,
End of XMIT
At Completion of Start bit,
Hardware Clears RSEN bit
1st bit
S bit Set by Hardware
TBRG
SDAx = 1,
SDAx = 1,
SCLx (no change)
SCLx = 1
and Sets SSPxIF
RSEN bit Set by Hardware
TBRG
TBRG TBRG TBRG
2010 Microchip Technology Inc. Preliminary DS39974A-page 335
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20.5.10 I2C MASTER MODE
TRANSMISSION
Transmission of a data byte, a 7-bit address or the
other half of a 10-bit address is accomplished by simply
writing a value to the SSPxBUF register. This action will
set the Buffer Full flag bit, BF, and allow the BRG to
begin counting and start the next transmission. Each bit
of address/data will be shifted out onto the SDAx pin
after the falling edge of SCLx is asserted (see data hold
time specification, parameter 106). SCLx is held low for
one BRG rollover count (TBRG). Data should be valid
before SCLx is released high (see data setup time
specification, parameter 107). When the SCLx pin is
released high, it is held that way for TBRG.
The data on the SDAx pin must remain stable for that
duration, and some hold time, after the next falling
edge of SCLx. After the eighth bit is shifted out (the fall-
ing edge of the eighth clock), the BF flag is cleared and
the master releases SDAx. This allows the slave device
being addressed to respond with an ACK bit during the
ninth bit time if an address match occurred or if data
was received properly. The status of ACK is written into
the ACKDT bit on the falling edge of the ninth clock.
If the master receives an Acknowledge, the Acknowl-
edge Status bit, ACKSTAT, is cleared; if not, the bit is
set. After the ninth clock, the SSPxIF bit is set and the
master clock (BRG) is suspended until the next data
byte is loaded into the SSPxBUF, leaving SCLx low and
SDAx unchanged (Figure 20-23).
After the write to the SSPxBUF, each bit of the address
will be shifted out on the falling edge of SCLx until all
seven address bits and the R/W bit are completed. On
the falling edge of the eighth clock, the master will
deassert the SDAx pin, allowing the slave to respond
with an Acknowledge. On the falling edge of the ninth
clock, the master will sample the SDAx pin to see if the
address was recognized by a slave. The status of the
ACK bit is loaded into the ACKSTAT status bit
(SSPxCON2<6>). Following the falling edge of the
ninth clock transmission of the address, the SSPxIF
flag is set, the BF flag is cleared and the BRG is turned
off until another write to the SSPxBUF takes place,
holding SCLx low and allowing SDAx to float.
20.5.10.1 BF Status Flag
In Transmit mode, the BF bit (SSPxSTAT<0>) is set
when the CPU writes to SSPxBUF and is cleared when
all eight bits are shifted out.
20.5.10.2 WCOL Status Flag
If the user writes the SSPxBUF when a transmit is
already in progress (i.e., SSPxSR is still shifting out a
data byte), the WCOL bit is set and the contents of the
buffer are unchanged (the write does not occur) after
2TCY after the SSPxBUF write. If SSPxBUF is rewritten
within 2 TCY, the WCOL bit is set and SSPxBUF is
updated. This may result in a corrupted transfer.
The user should verify that the WCOL bit is clear after
each write to SSPxBUF to ensure the transfer is correct.
In all cases, WCOL must be cleared in software.
20.5.10.3 ACKSTAT Status Flag
In Transmit mode, the ACKSTAT bit (SSPxCON2<6>)
is cleared when the slave has sent an Acknowledge
(ACK =0) and is set when the slave does not Acknowl-
edge (ACK = 1). A slave sends an Acknowledge when
it has recognized its address (including a general call)
or when the slave has properly received its data.
20.5.11 I2C MASTER MODE RECEPTION
Master mode reception is enabled by programming the
Receive Enable bit, RCEN (SSPxCON2<3>).
The BRG begins counting, and on each rollover, the
state of the SCLx pin changes (high-to-low/low-to-high)
and data is shifted into the SSPxSR. After the falling
edge of the eighth clock, the receive enable flag is
automatically cleared, the contents of the SSPxSR are
loaded into the SSPxBUF, the BF flag bit is set, the
SSPxIF flag bit is set and the BRG is suspended from
counting, holding SCLx low. The MSSP is now in an
Idle state awaiting the next command. When the buffer
is read by the CPU, the BF flag bit is automatically
cleared. The user can then send an Acknowledge bit at
the end of reception by setting the Acknowledge
Sequence Enable bit, ACKEN (SSPxCON2<4>).
20.5.11.1 BF Status Flag
In receive operation, the BF bit is set when an address
or data byte is loaded into SSPxBUF from SSPxSR. It
is cleared when the SSPxBUF register is read.
20.5.11.2 SSPOV Status Flag
In receive operation, the SSPOV bit is set when 8 bits
are received into the SSPxSR and the BF flag bit is
already set from a previous reception.
20.5.11.3 WCOL Status Flag
If users write the SSPxBUF when a receive is already
in progress (i.e., SSPxSR is still shifting in a data byte),
the WCOL bit is set and the contents of the buffer are
unchanged (the write does not occur).
Note: The MSSP module must be in an inactive
state before the RCEN bit is set or the
RCEN bit will be disregarded.
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DS39974A-page 336 Preliminary 2010 Microchip Technology Inc.
FIGURE 20 - 23: I2C™ MASTER MODE WA VEFORM (T R ANSMISSION, 7-BIT OR 10-BIT ADDRESS)
SDAx
SCLx
SSPxIF
BF (SSPxSTAT<0>)
SEN
A7 A6 A5 A4 A3 A2 A1 ACK = 0D7 D6 D5 D4 D3 D2 D1 D0
ACK
Transmitting Data or Second Half
R/W = 0Transmit Address to Slave
123456789 123456789 P
Cleared in software service routine
SSPxBUF is written in software
from MSSP interrupt
After Start condition, SEN cleared by hardware
S
SSPxBUF written with 7-bit address and R/W,
start transmit
SCLx held low
while CPU
responds to SSPxIF
SEN = 0
of 10-bit Address
Write SSPxCON2<0> (SEN = 1),
Start condition begins From slave, clear ACKSTAT bit (SSPxCON2<6>)
ACKSTAT in
SSPxCON2 = 1
Cleared in software
SSPxBUF written
PEN
R/W
Cleared in software
2010 Microchip Technology Inc. Preliminary DS39974A-page 337
PIC18F47J13 FAMILY
FIGURE 20 - 24: I2C™ MASTER MODE WAVEFORM (RECEPTION, 7-BIT ADDRESS)
P
9
87
6
5
D0
D1
D2
D3D4
D5
D6D7
S
A7 A6 A5 A4 A3 A2 A1
SDAx
SCLx 12
345678912345678 912 34
Bus master
terminates
transfer
ACK
Receiving Data from Slave
Receiving Data from Slave
D0
D1
D2
D3D4
D5
D6D7
ACK
R/W = 1
Transmit Address to Slave
SSPxIF
BF
ACK is not sent
Write to SSPxCON2<0> (SEN = 1),
Write to SSPxBUF occurs here, ACK from Slave
Master configured as a receiver
by programming SSPxCON2<3> (RCEN = 1)
PEN bit = 1
written here
Data shifted in on falling edge of CLK
Cleared in software
start XMIT
SEN = 0
SSPOV
SDAx = 0, SCLx = 1,
while CPU
(SSPxSTAT<0>)
ACK
Cleared in software
Cleared in software
Set SSPxIF interrupt
at end of receive
Set P bit
(SSPxSTAT<4>)
and SSPxIF
ACK from master,
Set SSPxIF at end
Set SSPxIF interrupt
at end of Acknowledge
sequence
Set SSPxIF interrupt
at end of Acknowledge
sequence
of receive
Set ACKEN, start Acknowledge sequence,
SDAx = ACKDT = 1
RCEN cleared
automatically
RCEN = 1, start
next receive
Write to SSPxCON2<4>
to start Acknowledge sequence,
SDAx = ACKDT (SSPxCON2<5>) = 0
RCEN cleared
automatically
responds to SSPxIF
ACKEN
begin Start condition
Cleared in software
SDAx = ACKDT = 0
Last bit is shifted into SSPxSR and
contents are unloaded into SSPxBUF
Cleared in
software
SSPOV is set because
SSPxBUF is still full
PIC18F47J13 FAMILY
DS39974A-page 338 Preliminary 2010 Microchip Technology Inc.
20.5.12 ACKNOWLEDGE SEQUENCE
TIMING
An Acknowledge sequence is enabled by setting the
Acknowledge Sequence Enable bit, ACKEN
(SSPxCON2<4>). When this bit is set, the SCLx pin is
pulled low and the contents of the Acknowledge data bit
are presented on the SDAx pin. If the user wishes to
generate an Acknowledge, then the ACKDT bit should
be cleared. If not, the user should set the ACKDT bit
before starting an Acknowledge sequence. The BRG
then counts for one rollover period (TBRG) and the SCLx
pin is deasserted (pulled high). When the SCLx pin is
sampled high (clock arbitration), the BRG counts for
TBRG; the SCLx pin is then pulled low. Following this, the
ACKEN bit is automatically cleared, the BRG is turned
off and the MSSP module then goes into an inactive
state (Figure 20-25).
20.5.12.1 WCOL Status Flag
If the user writes the SSPxBUF when an Acknowledge
sequence is in progress, then WCOL is set and the
contents of the buffer are unchanged (the write does
not occur).
20.5.13 STOP CONDITION TIMING
A Stop bit is asserted on the SDAx pin at the end of a
receive/transmit by setting the Stop Sequence Enable
bit, PEN (SSPxCON2<2>). At the end of a
receive/transmit, the SCLx line is held low after the
falling edge of the ninth clock. When the PEN bit is set,
the master will assert the SDAx line low. When the
SDAx line is sampled low, the BRG is reloaded and
counts down to 0. When the BRG times out, the SCLx
pin will be brought high and one Baud Rate Generator
rollover count (TBRG) later, the SDAx pin will be
deasserted. When the SDAx pin is sampled high while
SCLx is high, the Stop bit (SSPxSTAT<4>) is set. A
TBRG later, the PEN bit is cleared and the SSPxIF bit is
set (Figure 20-26).
20.5.13.1 WCOL Status Flag
If the user writes the SSPxBUF when a Stop sequence
is in progress, then the WCOL bit is set and the
contents of the buffer are unchanged (the write does
not occur).
FIGUR E 20-25: ACKNOWLEDGE SEQUENCE WAVEFORM
FIGURE 20-26: STOP CONDITION RECEIVE OR TRANSMIT MODE
SDAx
SCLx
SSPxIF Set at
Acknowledge Sequence Starts Here,
Write to SSPxCON2, ACKEN Automatically Cleared
Cleared in
TBRG TBRG
the End of Receive
8
ACKEN = 1, ACKDT = 0
D0
9
SSPxIF
Software SSPxIF Set at the End
of Acknowledge Sequence
Cleared in
Software
ACK
Note: TBRG = one Baud Rate Generator period.
SCLx
SDAx
SDAx Asserted Low before Rising Edge of Clock
Write to SSPxCON2,
Set PEN
Falling Edge of
SCLx = 1 for TBRG, Followed by SDAx = 1 for TBRG
9th Clock
SCLx Brought High after TBRG
TBRG TBRG
after SDAx Sampled High, P bit (SSPxSTAT<4>) is Set
TBRG
to Set up Stop Condition
ACK
P
TBRG
PEN bit (SSPxCON2<2>) is Cleared by
Hardware and the SSPxIF bit is Set
Note: TBRG = one Baud Rate Generator period.
2010 Microchip Technology Inc. Preliminary DS39974A-page 339
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20.5.14 SLEEP OPERATION
While in Sleep mode, the I2C module can receive
addresses or data and when an address match or
complete byte transfer occurs, wake the processor
from Sleep (if the MSSP interrupt is enabled).
20.5.15 EFFECTS OF A RESET
A Reset disables the MSSP module and terminates the
current transfer.
20.5.16 MULTI-MASTER MODE
In Multi-Master mode, the interrupt generation on the
detection of the Start and Stop conditions allows the
determination of when the bus is free. The Start and
Stop bits are cleared from a Reset or when the MSSP
module is disabled. Control of the I2C bus may be taken
when the P bit (SSPxSTAT<4>) is set, or the bus is Idle,
with both the Start and Stop bits clear. When the bus is
busy, enabling the MSSP interrupt will generate the
interrupt when the Stop condition occurs.
In multi-master operation, the SDAx line must be
monitored for arbitration to see if the signal level is the
expected output level. This check is performed in
hardware with the result placed in the BCLxIF bit.
The states where arbitration can be lost are:
• Address Transfer
• Data Transfer
• A Start Condition
• A Repeated Start Condition
• An Acknowledge Condition
20.5.17 MULTI -MASTER COMMUNICATION,
BUS COLLISION AND BUS
ARBITRATION
Multi-Master mode support is achieved by bus arbitra-
tion. When the master outputs address/data bits onto the
SDAx pin, arbitration takes place when the master out-
puts a ‘1’ on SDAx, by letting SDAx float high, and
another master asserts a ‘0’. When the SCLx pin floats
high, data should be stable. If the expected data on
SDAx is a ‘1’ and the data sampled on the SDAx pin = 0,
then a bus collision has taken place. The master will set
the Bus Collision Interrupt Flag, BCLxIF, and reset the
I2C port to its Idle state (Figure 20-27).
If a transmit was in progress when the bus collision
occurred, the transmission is Halted, the BF flag is
cleared, the SDAx and SCLx lines are deasserted and
the SSPxBUF can be written to. When the user services
the bus collision Interrupt Service Routine, and if the I2C
bus is free, the user can resume communication by
asserting a Start condition.
If a Start, Repeated Start, Stop or Acknowledge condition
was in progress when the bus collision occurred, the con-
dition is aborted, the SDAx and SCLx lines are
deasserted, and the respective control bits in the
SSPxCON2 register are cleared. When the user services
the bus collision Interrupt Service Routine (ISR), and if
the I2C bus is free, the user can resume communication
by asserting a Start condition.
The master will continue to monitor the SDAx and SCLx
pins. If a Stop condition occurs, the SSPxIF bit will be set.
A write to the SSPxBUF will start the transmission of
data at the first data bit regardless of where the
transmitter left off when the bus collision occurred.
In Multi-Master mode, the interrupt generation on the
detection of Start and Stop conditions allows the deter-
mination of when the bus is free. Control of the I2C bus
can be taken when the Stop bit is set in the SSPxSTAT
register, or the bus is Idle and the Start and Stop bits
are cleared.
FIGURE 20-27: BUS COLLISION TIMING FOR TRANSMIT AND ACKNOWLEDGE
SDAx
SCLx
BCLxIF
SDAx Released
SDAx Line Pulled Low
by Another Source
Sample SDAx. While SCLx is High,
Data doesn’t Match what is Driven
Bus Collision has Occurred
Set Bus Collision
Interrupt (BCLxIF)
by the Master;
by Master
Data Changes
while SCLx = 0
PIC18F47J13 FAMILY
DS39974A-page 340 Preliminary 2010 Microchip Technology Inc.
20.5.17.1 Bus Collision During a Start
Condition
During a Start condition, a bus collision occurs if:
a) SDAx or SCLx is sampled low at the beginning
of the Start condition (Figure 20-28).
b) SCLx is sampled low before SDAx is asserted
low (Figure 20-29).
During a Start condition, both the SDAx and the SCLx
pins are monitored.
If the SDAx pin is already low, or the SCLx pin is
already low, then all of the following occur:
• The Start condition is aborted
• The BCLxIF flag is set
• The MSSP module is reset to its inactive state
(Figure 20-28)
The Start condition begins with the SDAx and SCLx
pins deasserted. When the SDAx pin is sampled high,
the BRG is loaded from SSPxADD<6:0> and counts
down to 0. If the SCLx pin is sampled low while SDAx
is high, a bus collision occurs because it is assumed
that another master is attempting to drive a data ‘1’
during the Start condition.
If the SDAx pin is sampled low during this count, the
BRG is reset and the SDAx line is asserted early
(Figure 20-30). If, however, a ‘1’ is sampled on the
SDAx pin, the SDAx pin is asserted low at the end of
the BRG count. The BRG is then reloaded and counts
down to 0. If the SCLx pin is sampled as ‘0’ during this
time, a bus collision does not occur. At the end of the
BRG count, the SCLx pin is asserted low.
FIGURE 20-28: BUS COLLISION DURING START CONDITION (SDAx ONLY)
Note: The reason that a bus collision is not a fac-
tor during a Start condition is that no two
bus masters can assert a Start condition at
the exact same time. Therefore, one mas-
ter will always assert SDAx before the
other. This condition does not cause a bus
collision because the two masters must be
allowed to arbitrate the first address
following the Start condition. If the address
is the same, arbitration must be allowed to
continue into the data portion, Repeated
Start or Stop conditions.
SDAx
SCLx
SEN
SDAx Sampled Low Before
SDAx goes Low Before the SEN bit is Set;
S bit and SSPxIF Set because
MSSPx module Reset into Idle State
SEN Cleared Automatically because of Bus Collision;
S bit and SSPxIF Set because
Set SEN, Enable Start
Condition if SDAx = 1, SCLx = 1
SDAx = 0, SCLx = 1
BCLxIF
S
SSPxIF
SDAx = 0, SCLx = 1
SSPxIF and BCLxIF are
Cleared in Software
SSPxIF and BCLxIF are
Cleared in Software
Set BCLxIF,
Start Condition; Set BCLxIF;
2010 Microchip Technology Inc. Preliminary DS39974A-page 341
PIC18F47J13 FAMILY
FIGURE 20-29: BUS COLLISION DURING START CONDITION (SCLx = 0)
FIGURE 20-30: BRG RESET DUE TO SDAx ARBITRATION DURING START CONDITION
SDAx
SCLx
SEN Bus Collision Occurs; Set BCLxIF
SCLx = 0 before SDAx = 0,
Set SEN, Enable Start
Sequence if SDAx = 1, SCLx = 1
TBRG TBRG
SDAx = 0, SCLx = 1
BCLxIF
S
SSPxIF
Interrupt Cleared
in Software
Bus Collision Occurs. Set BCLxIF
SCLx = 0 before BRG Time-out;
‘0’‘0’
‘0’‘0’
SDAx
SCLx
SEN
Set S
Less than TBRG TBRG
SDAx = 0, SCLx = 1
BCLxIF
S
SSPxIF
S
Interrupts Cleared
in Software
Set SSPxIF
SDAx = 0, SCLx = 1,
SCLx Pulled Low after BRG
Time-out
Set SSPxIF
‘0’
SDAx Pulled Low by Other Master;
Reset BRG and Assert SDAx.
Set SEN, Enable Start
Sequence if SDAx = 1, SCLx = 1
PIC18F47J13 FAMILY
DS39974A-page 342 Preliminary 2010 Microchip Technology Inc.
20.5.17.2 Bus Collision During a Repeated
Start Condition
During a Repeated Start condition, a bus collision
occurs if:
a) A low level is sampled on SDAx when SCLx
goes from a low level to a high level.
b) SCLx goes low before SDAx is asserted low,
indicating that another master is attempting to
transmit a data ‘1’.
When the user deasserts SDAx and the pin is allowed
to float high, the BRG is loaded with SSPxADD<6:0>
and counts down to 0. The SCLx pin is then deasserted
and when sampled high, the SDAx pin is sampled.
If SDAx is low, a bus collision has occurred (i.e., another
master is attempting to transmit a data ‘0’; see
Figure 20-31). If SDAx is sampled high, the BRG is
reloaded and begins counting. If SDAx goes from
high-to-low before the BRG times out, no bus collision
occurs because no two masters can assert SDAx at
exactly the same time.
If SCLx goes from high-to-low before the BRG times
out and SDAx has not already been asserted, a bus
collision occurs. In this case, another master is
attempting to transmit a data ‘1’ during the Repeated
Start condition (see Figure 20-32).
If, at the end of the BRG time-out, both SCLx and SDAx
are still high, the SDAx pin is driven low and the BRG is
reloaded and begins counting. At the end of the count,
regardless of the status of the SCLx pin, the SCLx pin is
driven low and the Repeated Start condition is complete.
FIGURE 20-31: BUS COLLISION DURING A REPEATED START CONDITION (CASE 1)
FIGURE 20-32: BUS COLLISION DURING REPEATED START CONDITION (CASE 2)
SDAx
SCLx
RSEN
BCLxIF
S
SSPxIF
Sample SDAx when SCLx goes High;
If SDAx = 0, Set BCLxIF and Release SDAx and SCLx
Cleared in Software
‘0’
‘0’
SDAx
SCLx
BCLxIF
RSEN
S
SSPxIF
Interrupt Cleared
in Software
SCLx goes Low Before SDAx,
Set BCLxIF; Release SDAx and SCLx
TBRG TBRG
‘0’
2010 Microchip Technology Inc. Preliminary DS39974A-page 343
PIC18F47J13 FAMILY
20.5.17.3 Bus Collision During a Stop
Condition
Bus collision occurs during a Stop condition if:
a) After the SDAx pin has been deasserted and
allowed to float high, SDAx is sampled low after
the BRG has timed out.
b) After the SCLx pin is deasserted, SCLx is
sampled low before SDAx goes high.
The Stop condition begins with SDAx asserted low.
When SDAx is sampled low, the SCLx pin is allowed to
float. When the pin is sampled high (clock arbitration),
the BRG is loaded with SSPxADD<6:0> and counts
down to 0. After the BRG times out, SDAx is sampled. If
SDAx is sampled low, a bus collision has occurred. This
is due to another master attempting to drive a data ‘0’
(Figure 20-33). If the SCLx pin is sampled low before
SDAx is allowed to float high, a bus collision occurs. This
is another case of another master attempting to drive a
data ‘0’ (Figure 20-34).
FIGURE 20-33: BUS COLLISION DURING A STOP CONDITION (CASE 1)
FIGURE 20-34: BUS COLLISION DURING A STOP CONDITION (CASE 2)
SDAx
SCLx
BCLxIF
PEN
P
SSPxIF
TBRG TBRG TBRG
SDAx Asserted Low
SDAx Sampled
Low after TBRG,
Set BCLxIF
‘0’
‘0’
SDAx
SCLx
BCLxIF
PEN
P
SSPxIF
TBRG TBRG TBRG
Assert SDAx SCLx goes Low Before SDAx goes High,
Set BCLxIF
‘0’
‘0’
PIC18F47J13 FAMILY
DS39974A-page 344 Preliminary 2010 Microchip Technology Inc.
TABLE 20-4: REGISTERS ASSOCIATED WITH I2C™ OPERATION
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF
PIR1 PMPIF(3) ADIF RC1IF TX1IF SSP1IF CCP1IF TMR2IF TMR1IF
PIE1 PMPIE(3) ADIE RC1IE TX1IE SSP1IE CCP1IE TMR2IE TMR1IE
IPR1 PMPIP(3) ADIP RC1IP TX1IP SSP1IP CCP1IP TMR2IP TMR1IP
PIR2 OSCFIF CM2IF CM1IF —BCL1IFHLVDIF TMR3IF CCP2IF
PIE2 OSCFIE CM2IE CM1IE —BCL1IEHLVDIE TMR3IE CCP2IE
IPR2 OSCFIP CM2IP CM1IP —BCL1IPHLVDIP TMR3IP CCP2IP
PIR3 SSP2IF BCL2IF RC2IF TX2IF TMR4IF CTMUIF TMR3GIF RTCCIF
PIE3 SSP2IE BCL2IE RC2IE TX2IE TMR4IE CTMUIE TMR3GIE RTCCIE
IPR3 SSP2IP BCL2IP RC2IP TX2IP TMR4IP CTMUIP TMR3GIP RTCCIP
TRISD(3) TRISD7 TRISD6 TRISD5 TRISD4 TRISD3 TRISD2 TRISD1 TRISD0
TRISC TRISC7 TRISC6 TRISC5 TRISC4 TRISC3 TRISC2 TRISC1 TRISC0
TRISB TRISB7 TRISB6 TRISB5 TRISB4 TRISB3 TRISB2 TRISB1 TRISB0
SSP1BUF MSSP1 Receive Buffer/Transmit Register
SSP1ADD MSSP1 Address Register (I2C™ Slave mode), MSSP1 Baud Rate Reload Register (I2C Master mode)
SSPxMSK(1) MSK7 MSK6 MSK5 MSK4 MSK3 MSK2 MSK1 MSK0
SSPxCON1 WCOL SSPOV SSPEN CKP SSPM3 SSPM2 SSPM1 SSPM0
SSPxCON2 GCEN ACKSTAT ACKDT ACKEN RCEN PEN RSEN SEN
GCEN ACKSTAT ADMSK5(2) ADMSK4(2) ADMSK3(2) ADMSK2(2) ADMSK1(2) SEN
SSPxSTAT SMP CKE D/A PSR/WUA BF
SSP2BUF MSSP2 Receive Buffer/Transmit Register
SSP2ADD MSSP2 Address Register (I2C Slave mode), MSSP2 Baud Rate Reload Register (I2C Master mode)
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used by the MSSPx module in I2C™ mode.
Note 1: SSPxMSK shares the same address in SFR space as SSPxADD, but is only accessible in certain I2C Slave
mode operations in 7-Bit Masking mode. See Sect i on 20.5 .3 . 4 “7-Bit Address Masking Mo de” for more
details.
2: Alternate bit definitions for use in I2C Slave mode operations only.
3: These bits are only available on 44-pin devices.
2010 Microchip Technology Inc. Preliminary DS39974A-page 345
PIC18F47J13 FAMILY
21.0 ENHANCED UNIVE R SA L
SYNCHRONOUS
ASYNCHRONOUS RECEIVER
TRANSMITTER (EUSART)
The Enhanced Universal Synchronous Asynchronous
Receiver Transmitter (EUSART) module is one of two
serial I/O modules. (Generically, the EUSART is also
known as a Serial Communications Interface or SCI.)
The EUSART can be configured as a full-duplex
asynchronous system that can communicate with
peripheral devices, such as CRT terminals and
personal computers. It can also be configured as a
half-duplex synchronous system that can communicate
with peripheral devices, such as A/D or D/A integrated
circuits, serial EEPROMs and so on.
The Enhanced USART module implements additional
features, including Automatic Baud Rate Detection and
calibration, automatic wake-up on Sync Break recep-
tion, and 12-bit Break character transmit. These make
it ideally suited for use in Local Interconnect Network
bus (LIN/J2602 bus) systems.
All members of the PIC18F47J13 family are equipped
with two independent EUSART modules, referred to as
EUSART1 and EUSART2. They can be configured in
the following modes:
• Asynchronous (full-duplex) with:
- Auto-wake-up on character reception
- Auto-baud calibration
- 12-bit Break character transmission
• Synchronous – Master (half-duplex) with
selectable clock polarity
• Synchronous – Slave (half-duplex) with selectable
clock polarity
The pins of EUSART1 and EUSART2 are multi-
plexed with the functions of PORTC
(RC6/CCP9/PMA5/TX1/CK1/RP17 and
RC7/CCP10/PMA4/RX1/DT1/RP18), and remapped
(RPn1/TX2/CK2 and RPn2/RX2/DT2), respectively. In
order to configure these pins as an EUSART:
• For EUSART1:
- SPEN bit (RCSTA1<7>) must be set (= 1)
- TRISC<7> bit must be set (= 1)
- TRISC<6> bit must be cleared (= 0) for
Asynchronous and Synchronous Master
modes
- TRISC<6> bit must be set (= 1) for
Synchronous Slave mode
• For EUSART2:
- SPEN bit (RCSTA2<7>) must be set (= 1)
- TRIS bit for RPn2/RX2/DT2 = 1
- TRIS bit for RPn1/TX2/CK2 = 0 for
Asynchronous and Synchronous Master
modes
- TRISC<6> bit must be set (= 1) for
Synchronous Slave mode
The TXx/CKx I/O pins have an optional open-drain
output capability. By default, when this pin is used by
the EUSART as an output, it will function as a standard
push-pull CMOS output. The TXx/CKx I/O pins’
open-drain, output feature can be enabled by setting
the corresponding UxOD bit in the ODCON2 register.
For more details, see Section 20.3.3 “Open-Drain
Output Option”.
The operation of each Enhanced USART module is
controlled through three registers:
• Transmit Status and Control (TXSTAx)
• Receive Status and Control (RCSTAx)
• Baud Rate Control (BAUDCONx)
These are covered in detail in Register 21-1,
Register 21-2 and Register 21-3, respectively.
Note: The EUSART control will automatically
reconfigure the pin from input to output as
needed.
Note: Throughout this section, references to
register and bit names that may be associ-
ated with a specific EUSART module are
referred to generically by the use of ‘x’ in
place of the specific module number.
Thus, “RCSTAx” might refer to the
Receive Status register for either
EUSART1 or EUSART2.
PIC18F47J13 FAMILY
DS39974A-page 346 Preliminary 2010 Microchip Technology Inc.
REGISTER 21-1: TXSTAx: TRANSMIT STATUS AND CONTROL REGISTER
(1, ACCESS FADh; 2, FA8h)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R-1 R/W-0
CSRC TX9 TXEN(1) SYNC SENDB BRGH TRMT TX9D
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 CSRC: Clock Source Select bit
Asynchronous mode:
Don’t care.
Synchronous mode:
1 = Master mode (clock generated internally from BRG)
0 = Slave mode (clock from external source)
bit 6 TX9: 9-Bit Transmit Enable bit
1 = Selects 9-bit transmission
0 = Selects 8-bit transmission
bit 5 TXEN: Transmit Enable bit(1)
1 = Transmit is enabled and the TXx/CKx pin is configured as an output
0 = Transmit is disabled
bit 4 SYNC: EUSART Mode Select bit
1 = Synchronous mode
0 = Asynchronous mode
bit 3 SENDB: Send Break Character bit
Asynchronous mode:
1 = Send Sync Break on next transmission (cleared by hardware upon completion)
0 = Sync Break transmission completed
Synchronous mode:
Don’t care.
bit 2 BRGH: High Baud Rate Select bit
Asynchronous mode:
1 = High speed
0 = Low speed
Synchronous mode:
Unused in this mode.
bit 1 TRMT: Transmit Shift Register Status bit
1 = TSR is empty
0 = TSR is full
bit 0 TX9D: 9th bit of Transmit Data
Can be address/data bit or a parity bit.
Note 1: SREN/CREN overrides TXEN in Sync mode.
2010 Microchip Technology Inc. Preliminary DS39974A-page 347
PIC18F47J13 FAMILY
REGISTER 21-2: RCSTAx: RECEIVE STATUS AND CONTROL REGISTER
(1, ACCESS FACh; 2, FC9h)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R-0 R-0 R-x
SPEN RX9 SREN CREN ADDEN FERR OERR RX9D
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 SPEN: Serial Port Enable bit
1 = Serial port enabled
0 = Serial port disabled (held in Reset)
bit 6 RX9: 9-Bit Receive Enable bit
1 = Selects 9-bit reception
0 = Selects 8-bit reception
bit 5 SREN: Single Receive Enable bit
Asynchronous mode:
Don’t care.
Synchronous mode – Master:
1 = Enables single receive
0 = Disables single receive
This bit is cleared after reception is complete.
Synchronous mode – Slave:
Don’t care.
bit 4 CREN: Continuous Receive Enable bit
Asynchronous mode:
1 = Enables receiver
0 = Disables receiver
Synchronous mode:
1 = Enables continuous receive until enable bit, CREN, is cleared (CREN overrides SREN)
0 = Disables continuous receive
bit 3 ADDEN: Address Detect Enable bit
Asynchronous mode 9-Bit (RX9 = 1):
1 = Enables address detection, enables interrupt and loads the receive buffer when RSR<8> is set
0 = Disables address detection, all bytes are received and the ninth bit can be used as a parity bit
Asynchronous mode 8-Bit (RX9 = 0):
Don’t care.
bit 2 FERR: Framing Error bit
1 = Framing error (can be cleared by reading the RCREGx register and receiving the next valid byte)
0 = No framing error
bit 1 OERR: Overrun Error bit
1 = Overrun error (can be cleared by clearing bit, CREN)
0 = No overrun error
bit 0 RX9D: 9th bit of Received Data
This can be an address/data bit or a parity bit and must be calculated by user firmware.
PIC18F47J13 FAMILY
DS39974A-page 348 Preliminary 2010 Microchip Technology Inc.
REGISTER 21-3: BAUDCONx: BAUD RATE CONTROL REGISTER (ACCESS F7Eh, F7Ch)
R/W-0 R-1 R/W-0 R/W-0 R/W-0 U-0 R/W-0 R/W-0
ABDOVF RCIDL RXDTP TXCKP BRG16 — WUE ABDEN
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 ABDOVF: Auto-Baud Acquisition Rollover Status bit
1 = A BRG rollover has occurred during Auto-Baud Rate Detect mode (must be cleared in software)
0 = No BRG rollover has occurred
bit 6 RCIDL: Receive Operation Idle Status bit
1 = Receive operation is Idle
0 = Receive operation is active
bit 5 RXDTP: Data/Receive Polarity Select bit
Asynchronous mode:
1 = Receive data (RXx) is inverted (active-low)
0 = Receive data (RXx) is not inverted (active-high)
Synchronous mode:
1 = Data (DTx) is inverted (active-low)
0 = Data (DTx) is not inverted (active-high)
bit 4 TXCKP: Synchronous Clock Polarity Select bit
Asynchronous mode:
1 = Idle state for transmit (TXx) is a low level
0 = Idle state for transmit (TXx) is a high level
Synchronous mode:
1 = Idle state for clock (CKx) is a high level
0 = Idle state for clock (CKx) is a low level
bit 3 BRG16: 16-Bit Baud Rate Register Enable bit
1 = 16-bit Baud Rate Generator – SPBRGHx and SPBRGx
0 = 8-bit Baud Rate Generator – SPBRGx only (Compatible mode), SPBRGHx value is ignored
bit 2 Unimplemented: Read as ‘0’
bit 1 WUE: Wake-up Enable bit
Asynchronous mode:
1 = EUSART will continue to sample the RXx pin – interrupt is generated on the falling edge; bit is
cleared in hardware on the following rising edge
0 = RXx pin is not monitored or the rising edge detected
Synchronous mode:
Unused in this mode.
bit 0 ABDEN: Auto-Baud Detect Enable bit
Asynchronous mode:
1 = Enable baud rate measurement on the next character; requires reception of a Sync field (55h);
cleared in hardware upon completion
0 = Baud rate measurement disabled or completed
Synchronous mode:
Unused in this mode.
2010 Microchip Technology Inc. Preliminary DS39974A-page 349
PIC18F47J13 FAMILY
21.1 Baud Rate Generator (BRG)
The BRG is a dedicated, 8-bit or 16-bit generator that
supports both the Asynchronous and Synchronous
modes of the EUSART. By default, the BRG operates
in 8-bit mode. Setting the BRG16 bit (BAUDCONx<3>)
selects 16-bit mode.
The SPBRGHx:SPBRGx register pair controls the period
of a free-running timer. In Asynchronous mode, the
BRGH (TXSTAx<2>) and BRG16 (BAUDCONx<3>) bits
also control the baud rate. In Synchronous mode, BRGH
is ignored.
Table 21-1 provides the formula for computation of the
baud rate for different EUSART modes, which only apply
in Master mode (internally generated clock).
Given the desired baud rate and FOSC, the nearest
integer value for the SPBRGHx:SPBRGx registers can
be calculated using the formulas in Table 21-1. From
this, the error in baud rate can be determined. An
example calculation is provided in Example 21-1.
Typical baud rates and error values for the various
Asynchronous modes are provided in Table 21-2. It
may be advantageous to use the high baud rate
(BRGH = 1) or the 16-bit BRG to reduce the baud rate
error, or achieve a slow baud rate for a fast oscillator
frequency.
Writing a new value to the SPBRGHx:SPBRGx
registers causes the BRG timer to be reset (or cleared).
This ensures the BRG does not wait for a timer
overflow before outputting the new baud rate.
When operated in the Synchronous mode,
SPBRGH:SPBRG values of 0000h and 0001h are not
supported. In the Asynchronous mode, all BRG values
may be used.
21.1.1 OPERATION IN POWER-MANAGED
MODES
The device clock is used to generate the desired baud
rate. When one of the power-managed modes is
entered, the new clock source may be operating at a
different frequency. This may require an adjustment to
the value in the SPBRGx register pair.
21.1.2 SAMPLING
The data on the RXx pin (either RC7/CCP10/PMA4/
RX1/DT1/RP18 or RPn/RX2/DT2) is sampled three
times by a majority detect circuit to determine if a high or
a low level is present at the RXx pin.
TABLE 21-1: BAUD RATE FORMULAS
Configuration Bits BRG/EUSART Mode Baud Rate Formula
SYNC BRG16 BRGH
000 8-bit/Asynchronous FOSC/[64 (n + 1)]
001 8-bit/Asynchronous FOSC/[16 (n + 1)]
010 16-bit/Asynchronous
011 16-bit/Asynchronous
FOSC/[4 (n + 1)]10x 8-bit/Synchronous
11x 16-bit/Synchronous
Legend: x = Don’t care, n = value of SPBRGHx:SPBRGx register pair
PIC18F47J13 FAMILY
DS39974A-page 350 Preliminary 2010 Microchip Technology Inc.
EXAM PLE 21-1: CALCULATING BAUD RATE ERROR
TABLE 21-2: REGISTERS ASSOCIATED WITH BAUD RATE GENERATOR
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
TXSTAx CSRC TX9 TXEN SYNC SENDB BRGH TRMT TX9D
RCSTAx SPEN RX9 SREN CREN ADDEN FERR OERR RX9D
BAUDCONx ABDOVF RCIDL RXDTP TXCKP BRG16 —WUE ABDEN
SPBRGHx EUSARTx Baud Rate Generator High Byte
SPBRGx EUSARTx Baud Rate Generator Low Byte
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used by the BRG.
For a device with Fosc of 16 MHz, desired baud rate of 9600, Asynchronous mode, and
8-bit BRG:
Desired Baud Rate = Fosc/(64 ([SPBRGHx:SPBRGx] + 1))
Solving for SPBRGHx:SPBRGx:
X = ((Fosc/Desired Baud Rate)/64) – 1
= ((16000000/9600)/64) – 1
= [25.042] = 25
Calculated Baud Rate=16000000/(64 (25 + 1))
= 9615
Error = (Calculated Baud Rate – Desired Baud Rate)/Desired Baud Rate
= (9615 – 9600)/9600 = 0.16%
2010 Microchip Technology Inc. Preliminary DS39974A-page 351
PIC18F47J13 FAMILY
TABLE 21-3: BAUD RATES FOR ASYNCHRONOUS MODES
BAUD
RATE
(K)
SYNC = 0, BRGH = 0, BRG16 = 0
FOSC = 40.000 MHz FOSC = 20.000 MHz FOSC = 10.000 MHz FOSC = 8.000 MHz
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
0.3————————————
1.2 — — — 1.221 1.73 255 1.202 0.16 129 1.201 -0.16 103
2.4 2.441 1.73 255 2.404 0.16 129 2.404 0.16 64 2.403 -0.16 51
9.6 9.615 0.16 64 9.766 1.73 31 9.766 1.73 15 9.615 -0.16 12
19.2 19.531 1.73 31 19.531 1.73 15 19.531 1.73 7 — — —
57.6 56.818 -1.36 10 62.500 8.51 4 52.083 -9.58 2 — — —
115.2 125.000 8.51 4 104.167 -9.58 2 78.125 -32.18 1 — — —
BAUD
RATE
(K)
SYNC = 0, BRGH = 0, BRG16 = 0
FOSC = 4.000 MHz FOSC = 2.000 MHz FOSC = 1.000 MHz
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
0.3 0.300 0.16 207 0.300 -0.16 103 0.300 -0.16 51
1.2 1.202 0.16 51 1.201 -0.16 25 1.201 -0.16 12
2.4 2.404 0.16 25 2.403 -0.16 12 — — —
9.6 8.929 -6.99 6 — — — — — —
19.2 20.833 8.51 2 — — — — — —
57.6 62.500 8.51 0 — — — — — —
115.2 62.500 -45.75 0 — — — — — —
BAUD
RATE
(K)
SYNC = 0, BRGH = 1, BRG16 = 0
FOSC = 40.000 MHz FOSC = 20.000 MHz FOSC = 10.000 MHz FOSC = 8.000 MHz
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
0.3————————————
1.2————————————
2.4 — — — — — — 2.441 1.73 255 2.403 -0.16 207
9.6 9.766 1.73 255 9.615 0.16 129 9.615 0.16 64 9615. -0.16 51
19.2 19.231 0.16 129 19.231 0.16 64 19.531 1.73 31 19.230 -0.16 25
57.6 58.140 0.94 42 56.818 -1.36 21 56.818 -1.36 10 55.555 3.55 8
115.2 113.636 -1.36 21 113.636 -1.36 10 125.000 8.51 4 — — —
BAUD
RATE
(K)
SYNC = 0, BRGH = 1, BRG16 = 0
FOSC = 4.000 MHz FOSC = 2.000 MHz FOSC = 1.000 MHz
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
0.3 — — — — — — 0.300 -0.16 207
1.2 1.202 0.16 207 1.201 -0.16 103 1.201 -0.16 51
2.4 2.404 0.16 103 2.403 -0.16 51 2.403 -0.16 25
9.6 9.615 0.16 25 9.615 -0.16 12 — — —
19.2 19.231 0.16 12 — — — — — —
57.6 62.500 8.51 3 — — — — — —
115.2 125.000 8.51 1 — — — — — —
PIC18F47J13 FAMILY
DS39974A-page 352 Preliminary 2010 Microchip Technology Inc.
BAUD
RATE
(K)
SYNC = 0, BRGH = 0, BRG16 = 1
FOSC = 40.000 MHz FOSC = 20.000 MHz FOSC = 10.000 MHz FOSC = 8.000 MHz
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
0.3 0.300 0.00 8332 0.300 0.02 4165 0.300 0.02 2082 0.300 -0.04 1665
1.2 1.200 0.02 2082 1.200 -0.03 1041 1.200 -0.03 520 1.201 -0.16 415
2.4 2.402 0.06 1040 2.399 -0.03 520 2.404 0.16 259 2.403 -0.16 207
9.6 9.615 0.16 259 9.615 0.16 129 9.615 0.16 64 9.615 -0.16 51
19.2 19.231 0.16 129 19.231 0.16 64 19.531 1.73 31 19.230 -0.16 25
57.6 58.140 0.94 42 56.818 -1.36 21 56.818 -1.36 10 55.555 3.55 8
115.2 113.636 -1.36 21 113.636 -1.36 10 125.000 8.51 4 — — —
BAUD
RATE
(K)
SYNC = 0, BRGH = 0, BRG16 = 1
FOSC = 4.000 MHz FOSC = 2.000 MHz FOSC = 1.000 MHz
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
0.3 0.300 0.04 832 0.300 -0.16 415 0.300 -0.16 207
1.2 1.202 0.16 207 1.201 -0.16 103 1.201 -0.16 51
2.4 2.404 0.16 103 2.403 -0.16 51 2.403 -0.16 25
9.6 9.615 0.16 25 9.615 -0.16 12 — — —
19.2 19.231 0.16 12 — — — — — —
57.6 62.500 8.51 3 — — — — — —
115.2 125.000 8.51 1 — — — — — —
BAUD
RATE
(K)
SYNC = 0, BRGH = 1, BRG16 = 1 or SYNC = 1, BRG16 = 1
FOSC = 40.000 MHz FOSC = 20.000 MHz FOSC = 10.000 MHz FOSC = 8.000 MHz
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
0.3 0.300 0.00 33332 0.300 0.00 16665 0.300 0.00 8332 0.300 -0.01 6665
1.2 1.200 0.00 8332 1.200 0.02 4165 1.200 0.02 2082 1.200 -0.04 1665
2.4 2.400 0.02 4165 2.400 0.02 2082 2.402 0.06 1040 2.400 -0.04 832
9.6 9.606 0.06 1040 9.596 -0.03 520 9.615 0.16 259 9.615 -0.16 207
19.2 19.193 -0.03 520 19.231 0.16 259 19.231 0.16 129 19.230 -0.16 103
57.6 57.803 0.35 172 57.471 -0.22 86 58.140 0.94 42 57.142 0.79 34
115.2 114.943 -0.22 86 116.279 0.94 42 113.636 -1.36 21 117.647 -2.12 16
BAUD
RATE
(K)
SYNC = 0, BRGH = 1, BRG16 = 1 or SYNC = 1, BRG16 = 1
FOSC = 4.000 MHz FOSC = 2.000 MHz FOSC = 1.000 MHz
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
0.3 0.300 0.01 3332 0.300 -0.04 1665 0.300 -0.04 832
1.2 1.200 0.04 832 1.201 -0.16 415 1.201 -0.16 207
2.4 2.404 0.16 415 2.403 -0.16 207 2.403 -0.16 103
9.6 9.615 0.16 103 9.615 -0.16 51 9.615 -0.16 25
19.2 19.231 0.16 51 19.230 -0.16 25 19.230 -0.16 12
57.6 58.824 2.12 16 55.555 3.55 8 — — —
115.2 111.111 -3.55 8 — — — — — —
TABLE 21-3: BAUD RATES FOR ASYNCHRONOUS MODES (CONTINUED)
2010 Microchip Technology Inc. Preliminary DS39974A-page 353
PIC18F47J13 FAMILY
21.1.3 AUTO-BAUD RATE DETECT
The Enhanced USART module supports the automatic
detection and calibration of baud rate. This feature is
active only in Asynchronous mode and while the WUE
bit is clear.
The automatic baud rate measurement sequence
(Figure 21-1) begins whenever a Start bit is received
and the ABDEN bit is set. The calculation is
self-averaging.
In the Auto-Baud Rate Detect (ABD) mode, the clock to
the BRG is reversed. Rather than the BRG clocking the
incoming RXx signal, the RXx signal is timing the BRG.
In ABD mode, the internal BRG is used as a counter to
time the bit period of the incoming serial byte stream.
Once the ABDEN bit is set, the state machine will clear
the BRG and look for a Start bit. The ABD must receive
a byte with the value, 55h (ASCII “U”, which is also the
LIN/J2602 bus Sync character), in order to calculate the
proper bit rate. The measurement is taken over both a
low and high bit time in order to minimize any effects
caused by asymmetry of the incoming signal. After a
Start bit, the SPBRGx begins counting up, using the pre-
selected clock source on the first rising edge of RXx.
After eight bits on the RXx pin, or the fifth rising edge, an
accumulated value totalling the proper BRG period is left
in the SPBRGHx:SPBRGx register pair. Once the 5th
edge is seen (this should correspond to the Stop bit), the
ABDEN bit is automatically cleared.
If a rollover of the BRG occurs (an overflow from FFFFh
to 0000h), the event is trapped by the ABDOVF status
bit (BAUDCONx<7>). It is set in hardware by BRG roll-
overs and can be set or cleared by the user in software.
ABD mode remains active after rollover events and the
ABDEN bit remains set (Figure 21-2).
While calibrating the baud rate period, the BRG
registers are clocked at 1/8th the preconfigured clock
rate. Note that the BRG clock can be configured by the
BRG16 and BRGH bits. The BRG16 bit must be set to
use both SPBRG1 and SPBRGH1 as a 16-bit counter.
This allows the user to verify that no carry occurred for
8-bit modes by checking for 00h in the SPBRGHx
register.
Refer to Table 21-4 for counter clock rates to the BRG.
While the ABD sequence takes place, the EUSART
state machine is held in Idle. The RCxIF interrupt is set
once the fifth rising edge on RXx is detected. The value
in the RCREGx needs to be read to clear the RCxIF
interrupt. The contents of RCREGx should be
discarded.
TABLE 21-4: BRG COUNTER
CLOCK RATES
21.1.3.1 ABD and EUSART Transmission
Since the BRG clock is reversed during ABD acquisi-
tion, the EUSART transmitter cannot be used during
ABD. This means that whenever the ABDEN bit is set,
TXREGx cannot be written to. Users should also
ensure that ABDEN does not become set during a
transmit sequence. Failing to do this may result in
unpredictable EUSART operation.
Note 1: If the WUE bit is set with the ABDEN bit,
Auto-Baud Rate Detection will occur on
the byte following the Break character.
2: It is up to the user to determine that the
incoming character baud rate is within the
range of the selected BRG clock source.
Some combinations of oscillator frequency
and EUSART baud rates are not possible
due to bit error rates. Overall system
timing and communication baud rates
must be taken into consideration when
using the Auto-Baud Rate Detection
feature.
3: To maximize baud rate range, it is recom-
mended to set BRG16 bit if auto-baud
feature is used.
BRG16 BRGH BRG Counter Clock
00 FOSC/512
01 FOSC/128
10 FOSC/128
11 FOSC/32
PIC18F47J13 FAMILY
DS39974A-page 354 Preliminary 2010 Microchip Technology Inc.
FIGURE 21-1: AUTOMATIC BAUD RATE CALCULATION
FIGURE 21-2: BRG OVERFLOW SEQUENCE
BRG Value
RXx Pin
ABDEN bit
RCxIF bit
Bit 0 Bit 1
(Interrupt)
Read
RCREGx
BRG Clock
Start
Auto-Cleared
Set by User
XXXXh 0000h
Edge #1
Bit 2 Bit 3
Edge #2
Bit 4 Bit 5
Edge #3
Bit 6 Bit 7
Edge #4
001Ch
Note: The ABD sequence requires the EUSART module to be configured in Asynchronous mode and WUE = 0.
SPBRGx XXXXh 1Ch
SPBRGHx XXXXh 00h
Edge #5
Stop Bit
Start Bit 0
XXXXh 0000h 0000h
FFFFh
BRG Clock
ABDEN bit
RXx Pin
ABDOVF bit
BRG Value
2010 Microchip Technology Inc. Preliminary DS39974A-page 355
PIC18F47J13 FAMILY
21.2 EUSART Asynchronous Mode
The Asynchronous mode of operation is selected by
clearing the SYNC bit (TXSTAx<4>). In this mode, the
EUSART uses standard Non-Return-to-Zero (NRZ)
format (one Start bit, eight or nine data bits and one Stop
bit). The most common data format is 8 bits. An on-chip
dedicated 8-bit/16-bit BRG can be used to derive
standard baud rate frequencies from the oscillator.
The EUSART transmits and receives the LSb first. The
EUSART’s transmitter and receiver are functionally
independent but use the same data format and baud
rate. The BRG produces a clock, either x16 or x64 of the
bit shift rate, depending on the BRGH and BRG16 bits
(TXSTAx<2> and BAUDCONx<3>). Parity is not
supported by the hardware but can be implemented in
software and stored as the ninth data bit.
When operating in Asynchronous mode, the EUSART
module consists of the following important elements:
• Baud Rate Generator
• Sampling Circuit
• Asynchronous Transmitter
• Asynchronous Receiver
• Auto-Wake-up on Sync Break Character
• 12-Bit Break Character Transmit
• Auto-Baud Rate Detection
21.2.1 EUSART ASYNCHRONOUS
TRANSMITTER
Figure 21-3 displays the EUSART transmitter block
diagram.
The heart of the transmitter is the Transmit (Serial) Shift
Register (TSR). The shift register obtains its data from
the Read/Write Transmit Buffer register, TXREGx. The
TXREGx register is loaded with data in software. The
TSR register is not loaded until the Stop bit has been
transmitted from the previous load. As soon as the Stop
bit is transmitted, the TSR is loaded with new data from
the TXREGx register (if available).
Once the TXREGx register transfers the data to the TSR
register (occurs in one T
CY), the TXREGx register is
empty and the TXxIF flag bit is set. This interrupt can be
enabled or disabled by setting or clearing the interrupt
enable bit, TXxIE. TXxIF will be set regardless of the
state of TXxIE; it cannot be cleared in software. TXxIF is
also not cleared immediately upon loading TXREGx, but
becomes valid in the second instruction cycle following
the load instruction. Polling TXxIF immediately following
a load of TXREGx will return invalid results.
While TXxIF indicates the status of the TXREGx
register; another bit, TRMT (TXSTAx<1>), shows the
status of the TSR register. TRMT is a read-only bit,
which is set when the TSR register is empty. No inter-
rupt logic is tied to this bit, so the user has to poll this
bit in order to determine if the TSR register is empty.
To set up an Asynchronous Transmission:
1. Initialize the SPBRGHx:SPBRGx registers for
the appropriate baud rate. Set or clear the
BRGH and BRG16 bits, as required, to achieve
the desired baud rate.
2. Enable the asynchronous serial port by clearing
bit, SYNC, and setting bit, SPEN.
3. If interrupts are desired, set enable bit, TXxIE.
4. If 9-bit transmission is desired, set transmit bit,
TX9; can be used as an address/data bit.
5. Enable the transmission by setting bit, TXEN,
which will also set bit, TXxIF.
6. If 9-bit transmission is selected, the ninth bit
should be loaded in bit, TX9D.
7. Load data to the TXREGx register (starts
transmission).
8. If using interrupts, ensure that the GIE and PEIE
bits in the INTCON register (INTCON<7:6>) are
set.
FIGURE 21-3: EUSART TRANSMIT BLOCK DIAGRAM
Note 1: The TSR register is not mapped in data
memory, so it is not available to the user.
2: Flag bit, TXxIF, is set when enable bit,
TXEN, is set.
TXxIF
TXxIE
Interrupt
TXEN Baud Rate CLK
SPBRGx
Baud Rate Generator TX9D
MSb LSb
Data Bus
TXREGx Register
TSR Register
(8) 0
TX9
TRMT SPEN
TXx Pin
Pin Buffer
and Control
8

SPBRGHx
BRG16
PIC18F47J13 FAMILY
DS39974A-page 356 Preliminary 2010 Microchip Technology Inc.
FIGURE 21 - 4 : ASYNCHRONOUS T RANSMISSION
FIGURE 21-5: ASYNCHRONOUS TRANSMISSION (BACK-TO-BACK)
TABLE 21-5: REGISTERS ASSOCIATED WITH ASYNCHRONOUS TRANSMISSION
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF
PIR1 PMPIF(1) ADIF RC1IF TX1IF SSP1IF CCP1IF TMR2IF TMR1IF
PIE1 PMPIE(1) ADIE RC1IE TX1IE SSP1IE CCP1IE TMR2IE TMR1IE
IPR1 PMPIP(1) ADIP RC1IP TX1IP SSP1IP CCP1IP TMR2IP TMR1IP
PIR3 SSP2IF BCL2IF RC2IF TX2IF TMR4IF CTMUIF TMR3GIF RTCCIF
PIE3 SSP2IE BCL2IE RC2IE TX2IE TMR4IE CTMUIE TMR3GIE RTCCIE
IPR3 SSP2IP BCL2IP RC2IP TX2IP TMR4IP CTMUIP TMR3GIP RTCCIP
RCSTAx SPEN RX9 SREN CREN ADDEN FERR OERR RX9D
TXREGx EUSARTx Transmit Register
TXSTAx CSRC TX9 TXEN SYNC SENDB BRGH TRMT TX9D
BAUDCONx ABDOVF RCIDL RXDTP TXCKP BRG16 —WUE ABDEN
SPBRGHx EUSARTx Baud Rate Generator Register High Byte
SPBRGx EUSARTx Baud Rate Generator Register Low Byte
ODCON2 — — — — CCP10OD CCP9OD U2OD U1OD
Legend: — = unimplemented locations read as ‘0’. Shaded cells are not used for asynchronous transmission.
Note 1: These bits are only available on 44-pin devices.
Word 1
Word 1
Transmit Shift Reg
Start bit bit 0 bit 1 bit 7/8
Write to TXREGx
BRG Output
(Shift Clock)
TXx (pin)
TXxIF bit
(Transmit Buffer
Reg. Empty Flag)
TRMT bit
(Transmit Shift
Reg. Empty Flag)
1 TCY
Stop bit
Word 1
Transmit Shift Reg.
Write to TXREGx
BRG Output
(Shift Clock)
TXx (pin)
TXxIF bit
(Interrupt Reg. Flag)
TRMT bit
(Transmit Shift
Reg. Empty Flag)
Word 1 Word 2
Word 1 Word 2
Stop bit Start bit
Transmit Shift Reg.
Word 1 Word 2
bit 0 bit 1 bit 7/8 bit 0
Note: This timing diagram shows two consecutive transmissions.
1 TCY
1 TCY
Start bit
2010 Microchip Technology Inc. Preliminary DS39974A-page 357
PIC18F47J13 FAMILY
21.2.2 EUSART ASYNCHRONOUS
RECEIVER
The receiver block diagram is displayed in Figure 21-6.
The data is received on the RXx pin and drives the data
recovery block. The data recovery block is actually a
high-speed shifter, operating at x16 times the baud
rate, whereas the main receive serial shifter operates
at the bit rate or at FOSC. This mode would typically be
used in RS-232 systems.
To set up an Asynchronous Reception:
1. Initialize the SPBRGHx:SPBRGx registers for
the appropriate baud rate. Set or clear the
BRGH and BRG16 bits, as required, to achieve
the desired baud rate.
2. Enable the asynchronous serial port by clearing
bit, SYNC, and setting bit, SPEN.
3. If interrupts are desired, set enable bit, RCxIE.
4. If 9-bit reception is desired, set bit, RX9.
5. Enable the reception by setting bit, CREN.
6. Flag bit, RCxIF, will be set when reception is
complete and an interrupt will be generated if
enable bit, RCxIE, was set.
7. Read the RCSTAx register to get the ninth bit (if
enabled) and determine if any error occurred
during reception.
8. Read the 8-bit received data by reading the
RCREGx register.
9. If any error occurred, clear the error by clearing
enable bit, CREN.
10. If using interrupts, ensure that the GIE and PEIE
bits in the INTCON register (INTCON<7:6>) are
set.
21.2.3 SETTING UP 9-BIT MODE WITH
ADDRESS DETECT
This mode would typically be used in RS-485 systems.
To set up an Asynchronous Reception with Address
Detect Enable:
1. Initialize the SPBRGHx:SPBRGx registers for
the appropriate baud rate. Set or clear the
BRGH and BRG16 bits, as required, to achieve
the desired baud rate.
2. Enable the asynchronous serial port by clearing
the SYNC bit and setting the SPEN bit.
3. If interrupts are required, set the RCEN bit and
select the desired priority level with the RCxIP bit.
4. Set the RX9 bit to enable 9-bit reception.
5. Set the ADDEN bit to enable address detect.
6. Enable reception by setting the CREN bit.
7. The RCxIF bit will be set when reception is
complete. The interrupt will be Acknowledged if
the RCxIE and GIE bits are set.
8. Read the RCSTAx register to determine if any
error occurred during reception, as well as read
bit 9 of data (if applicable).
9. Read RCREGx to determine if the device is
being addressed.
10. If any error occurred, clear the CREN bit.
11. If the device has been addressed, clear the
ADDEN bit to allow all received data into the
receive buffer and interrupt the CPU.
FIGURE 21-6: EUSARTx RECEIVE BLOCK DIAGRAM
x64 Baud Rate CLK
Baud Rate Generator
RXx
Pin Buffer
and Control
SPEN
Data
Recovery
CREN OERR FERR
RSR Register
MSb LSb
RX9D RCREGx Register
2-Byte
Interrupt RCxIF
RCxIE
Data Bus
8
64
16
or
Stop Start
(8) 7 1 0
RX9

SPBRGxSPBRGHx
BRG16
or
4
FIFO
PIC18F47J13 FAMILY
DS39974A-page 358 Preliminary 2010 Microchip Technology Inc.
FIGURE 21 - 7 : ASYNCHRONOUS RECEPTION
TABLE 21-6: REGISTERS ASSOCIATED WITH ASYNCHRONOUS RECEPTION
21.2.4 AUTO-WAKE-UP ON SYNC BREAK
CHARACTER
During Sleep mode, all clocks to the EUSART are
suspended. Because of this, the BRG is inactive and a
proper byte reception cannot be performed. The
auto-wake-up feature allows the controller to wake-up
due to activity on the RXx/DTx line while the EUSART
is operating in Asynchronous mode.
The auto-wake-up feature is enabled by setting the
WUE bit (BAUDCONx<1>). Once set, the typical
receive sequence on RXx/DTx is disabled and the
EUSART remains in an Idle state, monitoring for a
wake-up event independent of the CPU mode. A
wake-up event consists of a high-to-low transition on
the RXx/DTx line. (This coincides with the start of a
Sync Break or a Wake-up Signal character for the
LIN/J2602 protocol.)
Following a wake-up event, the module generates an
RCxIF interrupt. The interrupt is generated synchro-
nously to the Q clocks in normal operating modes
(Figure 21-8) and asynchronously if the device is in
Sleep mode (Figure 21-9). The interrupt condition is
cleared by reading the RCREGx register.
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF
PIR1 PMPIF(1) ADIF RC1IF TX1IF SSP1IF CCP1IF TMR2IF TMR1IF
PIE1 PMPIE(1) ADIE RC1IE TX1IE SSP1IE CCP1IE TMR2IE TMR1IE
IPR1 PMPIP(1) ADIP RC1IP TX1IP SSP1IP CCP1IP TMR2IP TMR1IP
PIR3 SSP2IF BCL2IF RC2IF TX2IF TMR4IF CTMUIF TMR3GIF RTCCIF
PIE3 SSP2IE BCL2IE RC2IE TX2IE TMR4IE CTMUIE TMR3GIE RTCCIE
IPR3 SSP2IP BCL2IP RC2IP TX2IP TMR4IP CTMUIP TMR3GIP RTCCIP
RCSTAx SPEN RX9 SREN CREN ADDEN FERR OERR RX9D
RCREGx EUSARTx Receive Register
TXSTAx CSRC TX9 TXEN SYNC SENDB BRGH TRMT TX9D
BAUDCONx ABDOVF RCIDL RXDTP TXCKP BRG16 — WUE ABDEN
SPBRGHx EUSARTx Baud Rate Generator High Byte
SPBRGx EUSARTx Baud Rate Generator Low Byte
Legend: — = unimplemented locations read as ‘0’. Shaded cells are not used for asynchronous reception.
Note 1: These bits are only available on 44-pin devices.
Start
bit bit 7/8
bit 1bit 0 bit 7/8 bit 0
Stop
bit
Start
bit
Start
bit
bit 7/8 Stop
bit
RXx (pin)
Rcv Buffer Reg
Rcv Shift Reg
Read Rcv
Buffer Reg
RCREGx
RCxIF
(Interrupt Flag)
OERR bit
CREN
Word 1
RCREGx
Word 2
RCREGx
Stop
bit
Note: This timing diagram shows three words appearing on the RXx input. The RCREGx (Receive Buffer) is read after
the third word causing the OERR (Overrun) bit to be set.
2010 Microchip Technology Inc. Preliminary DS39974A-page 359
PIC18F47J13 FAMILY
The WUE bit is automatically cleared once a
low-to-high transition is observed on the RXx line
following the wake-up event. At this point, the EUSART
module is in Idle mode and returns to normal operation.
This signals to the user that the Sync Break event is
over.
21.2.4.1 Special Considerations Using
Auto-Wake-up
Since auto-wake-up functions by sensing rising edge
transitions on RXx/DTx, information with any state
changes before the Stop bit may signal a false
End-Of-Character (EOC) and cause data or framing
errors. To work properly, therefore, the initial character
in the transmission must be all ‘0’s. This can be 00h
(8 bits) for standard RS-232 devices or 000h (12 bits)
for LIN/J2602 bus.
Oscillator start-up time must also be considered,
especially in applications using oscillators with
longer start-up intervals (i.e., HS or HSPLL mode).
The Sync Break (or Wake-up Signal) character must
be of sufficient length and be followed by a sufficient
interval to allow enough time for the selected
oscillator to start and provide proper initialization of
the EUSART.
21.2.4.2 Special Considerations Using the
WUE Bit
The timing of WUE and RCxIF events may cause some
confusion when it comes to determining the validity of
received data. As noted, setting the WUE bit places the
EUSART in an Idle mode. The wake-up event causes a
receive interrupt by setting the RCxIF bit. The WUE bit
is cleared after this when a rising edge is seen on
RXx/DTx. The interrupt condition is then cleared by
reading the RCREGx register. Ordinarily, the data in
RCREGx will be dummy data and should be discarded.
The fact that the WUE bit has been cleared (or is still
set) and the RCxIF flag is set should not be used as an
indicator of the integrity of the data in RCREGx. Users
should consider implementing a parallel method in
firmware to verify received data integrity.
To assure that no actual data is lost, check the RCIDL
bit to verify that a receive operation is not in process. If
a receive operation is not occurring, the WUE bit may
then be set just prior to entering Sleep mode.
FIGURE 21-8: AUTO-WAKE-UP BIT (WUE) TIMINGS DURING NORMAL OPERATION
FIGURE 21-9: AUTO-WAKE-UP BIT (WUE) TIMINGS DURING SLEEP
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
OSC1
WUE bit(1)
RXx/DTx Line
RCxIF
Note 1: The EUSART remains in Idle while the WUE bit is set.
Bit Set by User
Cleared due to User Read of RCREGx
Auto-Cleared
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
OSC1
WUE bit(2)
RXx/DTx Line
RCxIF
Cleared due to User Read of RCREGx
SLEEP Command Executed
Note 1: If the wake-up event requires long oscillator warm-up time, the auto-clear of the WUE bit can occur before the
oscillator is ready. This sequence should not depend on the presence of Q clocks.
2: The EUSART remains in Idle while the WUE bit is set.
Sleep Ends
Note 1
Auto-Cleared
Bit set by user
PIC18F47J13 FAMILY
DS39974A-page 360 Preliminary 2010 Microchip Technology Inc.
21.2.5 BREAK CHARACTER SEQUENCE
The EUSART module has the capability of sending the
special Break character sequences that are required by
the LIN/J2602 bus standard. The Break character
transmit consists of a Start bit, followed by twelve ‘0’
bits and a Stop bit. The Frame Break character is sent
whenever the SENDB and TXEN bits (TXSTAx<3> and
TXSTAx<5>) are set while the Transmit Shift Register
is loaded with data.
Note that the value of data written to TXREGx will be
ignored and all ‘0’s will be transmitted.
The SENDB bit is automatically reset by hardware after
the corresponding Stop bit is sent. This allows the user
to preload the transmit FIFO with the next transmit byte
following the Break character (typically, the Sync
character in the LIN/J2602 specification).
Note that the data value written to the TXREGx for the
Break character is ignored. The write simply serves the
purpose of initiating the proper sequence.
The TRMT bit indicates when the transmit operation is
active or Idle, just as it does during normal transmis-
sion. See Figure 21-10 for the timing of the Break
character sequence.
21.2.5.1 Break and Sync Transmit Sequence
The following sequence will send a message frame
header made up of a Break, followed by an Auto-Baud
Sync byte. This sequence is typical of a LIN/J2602 bus
master.
1. Configure the EUSART for the desired mode.
2. Set the TXEN and SENDB bits to set up the
Break character.
3. Load the TXREGx with a dummy character to
initiate transmission (the value is ignored).
4. Write ‘55h’ to TXREGx to load the Sync
character into the transmit FIFO buffer.
5. After the Break has been sent, the SENDB bit is
reset by hardware. The Sync character now
transmits in the preconfigured mode.
When the TXREGx becomes empty, as indicated by the
TXxIF, the next data byte can be written to TXREGx.
21.2.6 RECEIVING A BREAK CHARACTER
The Enhanced USART module can receive a Break
character in two ways.
The first method forces configuration of the baud rate
at a frequency of 9/13 of the typical speed. This allows
for the Stop bit transition to be at the correct sampling
location (13 bits for Break versus Start bit and 8 data
bits for typical data).
The second method uses the auto-wake-up feature
described in Section 21.2.4 “Auto-Wake-up on Sync
Break Character”. By enabling this feature, the
EUSART will sample the next two transitions on
RXx/DTx, cause an RCxIF interrupt and receive the
next data byte followed by another interrupt.
Note that following a Break character, the user will
typically want to enable the Auto-Baud Rate Detect
feature. For both methods, the user can set the ABDEN
bit once the TXxIF interrupt is observed.
FIGURE 21-10: SEND BREAK CHARACTER SEQUENCE
Write to TXREGx
BRG Output
(Shift Clock)
Start Bit Bit 0 Bit 1 Bit 11 Stop Bit
Break
TXxIF bit
(Transmit Buffer
Reg. Empty Flag)
TXx (pin)
TRMT bit
(Transmit Shift
Reg. Empty Flag)
SENDB bit
(Transmit Shift
Reg. Empty Flag)
SENDB Sampled Here Auto-Cleared
Dummy Write
2010 Microchip Technology Inc. Preliminary DS39974A-page 361
PIC18F47J13 FAMILY
21.3 EUSART Synchronous Master
Mode
The Synchronous Master mode is entered by setting
the CSRC bit (TXSTAx<7>). In this mode, the data is
transmitted in a half-duplex manner (i.e., transmission
and reception do not occur at the same time). When
transmitting data, the reception is inhibited and vice
versa. Synchronous mode is entered by setting bit,
SYNC (TXSTAx<4>). In addition, enable bit, SPEN
(RCSTAx<7>), is set in order to configure the TXx and
RXx pins to CKx (clock) and DTx (data) lines,
respectively.
The Master mode indicates that the processor trans-
mits the master clock on the CKx line. Clock polarity is
selected with the TXCKP bit (BAUDCONx<4>). Setting
TXCKP sets the Idle state on CKx as high, while clear-
ing the bit sets the Idle state as low. This option is
provided to support Microwire devices with this module.
21.3.1 EUSART SYNCHRONOUS MASTER
TRANSMISSION
The EUSART transmitter block diagram is shown in
Figure 21-3. The heart of the transmitter is the Transmit
(Serial) Shift Register (TSR). The shift register obtains
its data from the Read/Write Transmit Buffer register,
TXREGx. The TXREGx register is loaded with data in
software. The TSR register is not loaded until the last
bit has been transmitted from the previous load. As
soon as the last bit is transmitted, the TSR is loaded
with new data from the TXREGx (if available).
Once the TXREGx register transfers the data to the
TSR register (occurs in one TCY), the TXREGx is empty
and the TXxIF flag bit is set. The interrupt can be
enabled or disabled by setting or clearing the interrupt
enable bit, TXxIE. TXxIF is set regardless of the state
of enable bit, TXxIE; it cannot be cleared in software. It
will reset only when new data is loaded into the
TXREGx register.
While flag bit, TXxIF, indicates the status of the TXREGx
register, another bit, TRMT (TXSTAx<1>), shows the
status of the TSR register. TRMT is a read-only bit which
is set when the TSR is empty. No interrupt logic is tied to
this bit, so the user must poll this bit in order to determine
if the TSR register is empty. The TSR is not mapped in
data memory so it is not available to the user.
To set up a Synchronous Master Transmission:
1. Initialize the SPBRGHx:SPBRGx registers for the
appropriate baud rate. Set or clear the BRG16
bit, as required, to achieve the required baud
rate.
2. Enable the synchronous master serial port by
setting bits, SYNC, SPEN and CSRC.
3. If interrupts are desired, set enable bit, TXxIE.
4. If 9-bit transmission is required, set bit, TX9.
5. Enable the transmission by setting bit, TXEN.
6. If 9-bit transmission is selected, the ninth bit
should be loaded in bit, TX9D.
7. Start transmission by loading data to the
TXREGx register.
8. If using interrupts, ensure that the GIE and PEIE
bits in the INTCON register (INTCON<7:6>) are
set.
FIGURE 21-11: SYNCHRONOUS TRANSMISSION
bit 0 bit 1 bit 7
Word 1
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
bit 2 bit 0 bit 1 bit 7
RC7/CCP10/PMA4/RX1/
RC6/CCP9/PMA5/TX1/CK1/
Write to
TXREG1 Reg
TX1IF bit
(Interrupt Flag)
TXEN bit
‘1’ ‘1’
Word 2
TRMT bit
Write Word 1 Write Word 2
Note: Sync Master mode, SPBRGx = 0; continuous transmission of two 8-bit words. This example is equally applicable to EUSART2
(RPn1/TX2/CK2 and RPn2/RX2/DT2).
RC6/CCP9/PMA5/TX1/CK1/
RP17 (TXCKP =
0
)
RP17 (TXCKP =
1
)
DT1/RP18
PIC18F47J13 FAMILY
DS39974A-page 362 Preliminary 2010 Microchip Technology Inc.
FIGUR E 21-12: SYNCHRONOUS TRANSMISSION (THROUGH TXEN)
TABLE 21-7: REGISTERS ASSOCIATED WITH SYNCHRONOUS MASTER TRANSMISSION
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF
PIR1 PMPIF(1) ADIF RC1IF TX1IF SSP1IF CCP1IF TMR2IF TMR1IF
PIE1 PMPIE(1) ADIE RC1IE TX1IE SSP1IE CCP1IE TMR2IE TMR1IE
IPR1 PMPIP(1) ADIP RC1IP TX1IP SSP1IP CCP1IP TMR2IP TMR1IP
PIR3 SSP2IF BCL2IF RC2IF TX2IF TMR4IF CTMUIF TMR3GIF RTCCIF
PIE3 SSP2IE BCL2IE RC2IE TX2IE TMR4IE CTMUIE TMR3GIE RTCCIE
IPR3 SSP2IP BCL2IP RC2IP TX2IP TMR4IP CTMUIP TMR3GIP RTCCIP
RCSTAx SPEN RX9 SREN CREN ADDEN FERR OERR RX9D
TXREGx EUSARTx Transmit Register
TXSTAx CSRC TX9 TXEN SYNC SENDB BRGH TRMT TX9D
BAUDCONx ABDOVF RCIDL RXDTP TXCKP BRG16 —WUE ABDEN
SPBRGHx EUSARTx Baud Rate Generator High Byte
SPBRGx EUSARTx Baud Rate Generator Low Byte
ODCON2 — — — — CCP10OD CCP9OD U2OD U1OD
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used for synchronous master transmission.
Note 1: These pins are only available on 44-pin devices.
RC7/CCP10/PMA4/RX1/DT1/
RC6/CCP9/PMA5/TX1/CK1/
Write to
TXREG1 reg
TX1IF bit
TRMT bit
bit 0 bit 1 bit 2 bit 6 bit 7
TXEN bit
Note: This example is equally applicable to EUSART2 (RPn1/TX2/CK2 and RPn2/RX2/DT2).
RP18 Pin
RP17 Pin
2010 Microchip Technology Inc. Preliminary DS39974A-page 363
PIC18F47J13 FAMILY
21.3.2 EUSART SYNCHRONOUS MASTER
RECEPTION
Once Synchronous mode is selected, reception is
enabled by setting either the Single Receive Enable bit,
SREN (RCSTAx<5>), or the Continuous Receive
Enable bit, CREN (RCSTAx<4>). Data is sampled on
the RXx pin on the falling edge of the clock.
If enable bit, SREN, is set, only a single word is
received. If enable bit, CREN, is set, the reception is
continuous until CREN is cleared. If both bits are set,
then CREN takes precedence.
To set up a Synchronous Master Reception:
1. Initialize the SPBRGHx:SPBRGx registers for
the appropriate baud rate. Set or clear the
BRG16 bit, as required, to achieve the desired
baud rate.
2. Enable the synchronous master serial port by
setting bits, SYNC, SPEN and CSRC.
3. Ensure bits, CREN and SREN, are clear.
4. If interrupts are desired, set enable bit, RCxIE.
5. If 9-bit reception is desired, set bit, RX9.
6. If a single reception is required, set bit, SREN.
For continuous reception, set bit, CREN.
7. Interrupt flag bit, RCxIF, will be set when
reception is complete and an interrupt will be
generated if the enable bit, RCxIE, was set.
8. Read the RCSTAx register to get the ninth bit (if
enabled) and determine if any error occurred
during reception.
9. Read the 8-bit received data by reading the
RCREGx register.
10. If any error occurred, clear the error by clearing
bit, CREN.
11. If using interrupts, ensure that the GIE and PEIE
bits in the INTCON register (INTCON<7:6>) are
set.
FIGURE 21-13: SYNCHRONOUS RECEPTION (MASTER MODE, SREN)
CREN bit
RC7/CCP10/PMA4/
RC6/CCP9/PMA5/TX1/
Write to
SREN bit
SREN bit
RC1IF bit
(Interrupt)
Read
RCREG1
Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4Q2 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
‘
0
’
bit 0 bit 1 bit 2 bit 3 bit 4 bit 5 bit 6 bit 7
‘
0
’
Q1 Q2 Q3 Q4
Note: Timing diagram demonstrates Sync Master mode with bit, SREN = 1, and bit, BRGH = 0. This example is equally applicable to EUSART2
(RPn1/TX2/CK2 and RPn2/RX2/DT2).
RC6/CCP9/PMA5/TX1/
RX1/DT1/RP18
CK1/RP17 (TXCKP =
0
)
CK1/RP17 (TXCKP =
1
)
PIC18F47J13 FAMILY
DS39974A-page 364 Preliminary 2010 Microchip Technology Inc.
TABLE 21-8: REGISTERS ASSOCIATED WITH SYNCHRONOUS MASTER RECEPTION
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF
PIR1 PMPIF(1) ADIF RC1IF TX1IF SSP1IF CCP1IF TMR2IF TMR1IF
PIE1 PMPIE(1) ADIE RC1IE TX1IE SSP1IE CCP1IE TMR2IE TMR1IE
IPR1 PMPIP(1) ADIP RC1IP TX1IP SSP1IP CCP1IP TMR2IP TMR1IP
PIR3 SSP2IF BCL2IF RC2IF TX2IF TMR4IF CTMUIF TMR3GIF RTCCIF
PIE3 SSP2IE BCL2IE RC2IE TX2IE TMR4IE CTMUIE TMR3GIE RTCCIE
IPR3 SSP2IP BCL2IP RC2IP TX2IP TMR4IP CTMUIP TMR3GIP RTCCIP
RCSTAx SPEN RX9 SREN CREN ADDEN FERR OERR RX9D
RCREGx EUSARTx Receive Register
TXSTAx CSRC TX9 TXEN SYNC SENDB BRGH TRMT TX9D
BAUDCONx ABDOVF RCIDL RXDTP TXCKP BRG16 —WUE ABDEN
SPBRGHx EUSARTx Baud Rate Generator High Byte
SPBRGx EUSARTx Baud Rate Generator Low Byte
ODCON2 — — — — CCP10OD CCP9OD U2OD U1OD
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used for synchronous master reception.
Note 1: These pins are only available on 44-pin devices.
2010 Microchip Technology Inc. Preliminary DS39974A-page 365
PIC18F47J13 FAMILY
21.4 EUSART Synchronous Slave
Mode
Synchronous Slave mode is entered by clearing bit,
CSRC (TXSTAx<7>). This mode differs from the
Synchronous Master mode in that the shift clock is sup-
plied externally at the CKx pin (instead of being supplied
internally in Master mode). This allows the device to
transfer or receive data while in any low-power mode.
21.4.1 EUSART SYNCHRONOUS SLAVE
TRANSMISSION
The operation of the Synchronous Master and Slave
modes is identical, except in the case of Sleep mode.
If two words are written to the TXREGx, and then the
SLEEP instruction is executed, the following will occur:
a) The first word will immediately transfer to the
TSR register and transmit.
b) The second word will remain in the TXREGx
register.
c) Flag bit, TXxIF, will not be set.
d) When the first word has been shifted out of TSR,
the TXREGx register will transfer the second word
to the TSR and flag bit, TXxIF, will now be set.
e) If enable bit, TXxIE, is set, the interrupt will wake
the chip from Sleep. If the global interrupt is
enabled, the program will branch to the interrupt
vector.
To set up a Synchronous Slave Transmission:
1. Enable the synchronous slave serial port by
setting bits, SYNC and SPEN, and clearing bit,
CSRC.
2. Clear bits, CREN and SREN.
3. If interrupts are desired, set enable bit, TXxIE.
4. If 9-bit transmission is desired, set bit, TX9.
5. Enable the transmission by setting enable bit,
TXEN.
6. If 9-bit transmission is selected, the ninth bit
should be loaded in bit, TX9D.
7. Start transmission by loading data to the
TXREGx register.
8. If using interrupts, ensure that the GIE and PEIE
bits in the INTCON register (INTCON<7:6>) are
set.
TABLE 21-9: REGISTERS ASSOCIATED WITH SYNCHRONOUS SLAVE TRANSMISSION
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF
PIR1 PMPIF(1) ADIF RC1IF TX1IF SSP1IF CCP1IF TMR2IF TMR1IF
PIE1 PMPIE(1) ADIE RC1IE TX1IE SSP1IE CCP1IE TMR2IE TMR1IE
IPR1 PMPIP(1) ADIP RC1IP TX1IP SSP1IP CCP1IP TMR2IP TMR1IP
PIR3 SSP2IF BCL2IF RC2IF TX2IF TMR4IF CTMUIF TMR3GIF RTCCIF
PIE3 SSP2IE BCL2IE RC2IE TX2IE TMR4IE CTMUIE TMR3GIE RTCCIE
IPR3 SSP2IP BCL2IP RC2IP TX2IP TMR4IP CTMUIP TMR3GIP RTCCIP
RCSTAx SPEN RX9 SREN CREN ADDEN FERR OERR RX9D
TXREGx EUSARTx Transmit Register
TXSTAx CSRC TX9 TXEN SYNC SENDB BRGH TRMT TX9D
BAUDCONx ABDOVF RCIDL RXDTP TXCKP BRG16 —WUE ABDEN
SPBRGHx EUSARTx Baud Rate Generator High Byte
SPBRGx EUSARTx Baud Rate Generator Low Byte
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used for synchronous slave transmission.
Note 1: These pins are only available on 44-pin devices.
PIC18F47J13 FAMILY
DS39974A-page 366 Preliminary 2010 Microchip Technology Inc.
21.4.2 EUSART SYNCHRONOUS SLAVE
RECEPTION
The operation of the Synchronous Master and Slave
modes is identical, except in the case of Sleep, or any
Idle mode and bit, SREN, which is a “don’t care” in
Slave mode.
If receive is enabled by setting the CREN bit prior to
entering Sleep or any Idle mode, then a word may be
received while in this low-power mode. Once the word
is received, the RSR register will transfer the data to the
RCREGx register. If the RCxIE enable bit is set, the
interrupt generated will wake the chip from the
low-power mode. If the global interrupt is enabled, the
program will branch to the interrupt vector.
To set up a Synchronous Slave Reception:
1. Enable the synchronous master serial port by
setting bits, SYNC and SPEN, and clearing bit,
CSRC.
2. If interrupts are desired, set enable bit, RCxIE.
3. If 9-bit reception is desired, set bit, RX9.
4. To enable reception, set enable bit, CREN.
5. Flag bit, RCxIF, will be set when reception is
complete. An interrupt will be generated if
enable bit, RCxIE, was set.
6. Read the RCSTAx register to get the ninth bit (if
enabled) and determine if any error occurred
during reception.
7. Read the 8-bit received data by reading the
RCREGx register.
8. If any error occurred, clear the error by clearing
bit, CREN.
9. If using interrupts, ensure that the GIE and PEIE
bits in the INTCON register (INTCON<7:6>) are
set.
TABLE 21-10: REGISTERS ASSOCIATED WITH SYNCHRONOUS SLAVE RECEPTION
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF
PIR1 PMPIF(1) ADIF RC1IF TX1IF SSP1IF CCP1IF TMR2IF TMR1IF
PIE1 PMPIE(1) ADIE RC1IE TX1IE SSP1IE CCP1IE TMR2IE TMR1IE
IPR1 PMPIP(1) ADIP RC1IP TX1IP SSP1IP CCP1IP TMR2IP TMR1IP
PIR3 SSP2IF BCL2IF RC2IF TX2IF TMR4IF CTMUIF TMR3GIF RTCCIF
PIE3 SSP2IE BCL2IE RC2IE TX2IE TMR4IE CTMUIE TMR3GIE RTCCIE
IPR3 SSP2IP BCL2IP RC2IP TX2IP TMR4IP CTMUIP TMR3GIP RTCCIP
RCSTAx SPEN RX9 SREN CREN ADDEN FERR OERR RX9D
RCREGx EUSARTx Receive Register
TXSTAx CSRC TX9 TXEN SYNC SENDB BRGH TRMT TX9D
BAUDCONx ABDOVF RCIDL RXDTP TXCKP BRG16 —WUE ABDEN
SPBRGHx EUSARTx Baud Rate Generator High Byte
SPBRGx EUSARTx Baud Rate Generator Low Byte
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used for synchronous slave reception.
Note 1: These pins are only available on 44-pin devices.
2010 Microchip Technology Inc. Preliminary DS39974A-page 367
PIC18F47J13 FAMILY
22.0 10/12-BIT ANALOG-TO-DIGITAL
CONVERTER (A/D) MODULE
The Analog-to-Digital (A/D) Converter module in the
PIC18F47J13 family of devices has 10 inputs for the
28-pin devices and 13 inputs for the 44-pin devices.
This module allows conversion of an analog input
signal to a corresponding 10 or 12-bit digital number.
The module has these registers:
• A/D Control Register 0 (ADCON0)
• A/D Control Register 1 (ADCON1)
• A/D Port Configuration Register 0 (ANCON0)
• A/D Port Configuration Register 1 (ANCON1)
• A/D Result Registers (ADRESH and ADRESL)
• A/D Trigger Register (ADCTRIG)
• Configuration Register 3 High (ADCSEL,
CONFIG3H<1>)
The ADCON0 register, shown in Register 22-1,
controls the operation of the A/D module.
The ADCON1 register, shown in Register 22-2, config-
ures the A/D clock source, programmed acquisition
time and justification. The ANCON0 and ANCON1
registers, in Register 22-1 and Register 22-2, configure
the functions of the port pins.
The ADCSEL Configuration bit (CONFIG3H<1>) sets
the module for 10 or 12-bit conversions. The 10-Bit
Conversion mode is useful for applications that favor
conversion speed over conversion resolution.
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DS39974A-page 368 Preliminary 2010 Microchip Technology Inc.
REGISTER 22-1: ADCON0: A/D CONTROL REGISTER 0 (ACCESS FC2h)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
VCFG1 VCFG0 CHS3(2) CHS2(2) CHS1(2) CHS0(2) GO/DONE ADON
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 VCFG1: Voltage Reference Configuration bit (VREF- source)
1 = VREF- (AN2)
0 = AVSS(4)
bit 6 VCFG0: Voltage Reference Configuration bit (VREF+ source)
1 = VREF+ (AN3)
0 = AVDD(4)
bit 5-2 CHS<3:0>: Analog Channel Select bits(2)
0000 = Channel 00 (AN0)
0001 = Channel 01 (AN1)
0010 = Channel 02 (AN2)
0011 = Channel 03 (AN3)
0100 = Channel 04 (AN4)
0101 = Channel 05 (AN5)(1)
0110 = Channel 06 (AN6)(1)
0111 = Channel 07 (AN7)(1)
1000 = Channel 08 (AN8)
1001 = Channel 09 (AN9)
1010 = Channel 10 (AN10)
1011 = Channel 11 (AN11)
1100 = Channel 12 (AN12)
1101 = (Reserved)
1110 = VDDCORE
1111 = VBG Absolute Reference (~1.2V)(3)
bit 1 GO/DONE: A/D Conversion Status bit
When ADON = 1:
1 = A/D conversion is in progress
0 = A/D is Idle
bit 0 ADON: A/D On bit
1 = A/D Converter module is enabled
0 = A/D Converter module is disabled
Note 1: These channels are not implemented on 28-pin devices.
2: Performing a conversion on unimplemented channels will return random values.
3: For best accuracy, the band gap reference circuit should be enabled (ANCON1<7> = 1) at least 10 ms
before performing a conversion on this channel.
4: On 44-pin, QFN devices, AVDD and AVSS reference sources are intended to be externally connected to
VDD and VSS levels. Other package types tie AVDD and AVSS to VDD and VSS internally.
2010 Microchip Technology Inc. Preliminary DS39974A-page 369
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REGISTER 22-2: ADCON1: A/D CONTROL REGISTER 1 (ACCESS FC1h)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
ADFM ADCAL ACQT2 ACQT1 ACQT0 ADCS2 ADCS1 ADCS0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 ADFM: A/D Result Format Select bit
1 = Right justified
0 = Left justified
bit 6 ADCAL: A/D Calibration bit
1 = Calibration is performed on the next A/D conversion
0 = Normal A/D Converter operation
bit 5-3 ACQT<2:0>: A/D Acquisition Time Select bits
111 = 20 T
AD
110 = 16 TAD
101 = 12 TAD
100 = 8 TAD
011 = 6 TAD
010 = 4 TAD
001 = 2 TAD
000 = 0 TAD
bit 2-0 ADCS<2:0>: A/D Conversion Clock Select bits
110 = FOSC/64
101 = FOSC/16
100 = FOSC/4
011 = FRC (clock derived from A/D RC oscillator)(1)
010 = FOSC/32
001 = FOSC/8
000 = FOSC/2
Note 1: If the A/D FRC clock source is selected, a delay of one T
CY (instruction cycle) is added before the A/D
clock starts. This allows the SLEEP instruction to be executed before starting a conversion.
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DS39974A-page 370 Preliminary 2010 Microchip Technology Inc.
REGISTER 22-3: CONFIG3H: CONFIGURATION REGISTER 3 HIGH (BYTE ADDRESS 300005h)
U-1 U-1 U-1 U-1 R/WO-1 U-0 R/WO-1 R/WO-1
— — — — MSSPMSK — ADCSEL IOL1WAY
bit 7 bit 0
Legend:
R = Readable bit WO = Write-Once bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-4 Unimplemented: Program the corresponding Flash Configuration bit to ‘1’
bit 3 MSSPMSK: MSSP 7-Bit Address Masking Mode Enable bit
1 = 7-Bit Address Masking mode is enabled
0 = 5-Bit Address Masking mode is enabled
bit 2 Unimplemented: Read as ‘0’
bit 1 ADCSEL: A/D Converter Mode bit
1 = 10-Bit Conversion mode is enabled
0 = 12-Bit Conversion mode is enabled
bit 0 IOL1WAY: IOLOCK One Way Set Enable bit
1 = IOLOCK bit (PPSCON<0>) can be set once, provided the unlock sequence has been completed.
Once set, the Peripheral Pin Select registers cannot be written to a second time.
0 = IOLOCK bit (PPSCON<0>) can be set and cleared as needed, provided the unlock sequence has
been completed
2010 Microchip Technology Inc. Preliminary DS39974A-page 371
PIC18F47J13 FAMILY
The ANCON0 and ANCON1 registers are used to
configure the operation of the I/O pin associated with
each analog channel. Setting any one of the PCFG bits
configures the corresponding pin to operate as a digital
only I/O. Clearing a bit configures the pin to operate as
an analog input for either the A/D Converter or the
comparator module. All digital peripherals are disabled
and digital inputs read as ‘0’. As a rule, I/O pins that are
multiplexed with analog inputs default to analog
operation on device Resets.
In order to correctly perform A/D conversions on the VBG
band gap reference (ADCON0<5:2> = 1111), the refer-
ence circuit must be powered on first. The VBGEN bit in
the ANCON1 register allows the firmware to manually
request that the band gap reference circuit should be
enabled. For best accuracy, firmware should allow a
settling time of at least 10 ms prior to performing the first
acquisition on this channel after enabling the band gap
reference.
The reference circuit may already have been turned on
if some other hardware module (such as the on-chip
voltage regulator, comparators or HLVD) has already
requested it. In this case, the initial turn-on settling time
may have already elapsed and firmware does not need
to wait as long before measuring VBG. Once the acqui-
sition is complete, firmware may clear the VBGEN bit,
which will save a small amount of power if no other
modules are still requesting the VBG reference.
REGISTER 22-4: ANCON0: A/D PORT CONFIGURATION REGISTER 0 (BANKED F48h)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
PCFG7(1) PCFG6(1) PCFG5(1) PCFG4 PCFG3 PCFG2 PCFG1 PCFG0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-0 PCFG<7:0>: Analog Port Configuration bits (AN7-AN0)
1 = Pin configured as a digital port
0 = Pin configured as an analog channel – digital input disabled and reads ‘0’
Note 1: These bits are only available only on 44-pin devices.
REGISTER 22-5: ANCON1: A/D PORT CONFIGURATION REGISTER 1 (BANKED F49h)
R/W-0 R U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
VBGEN r— PCFG12 PCFG11 PCFG10 PCFG9 PCFG8
bit 7 bit 0
Legend: r = Reserved bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 VBGEN: 1.2V Band Gap Reference Enable bit
1 = 1.2V band gap reference is powered on
0 = 1.2V band gap reference is turned off to save power (if no other modules are requesting it)
bit 6 Reserved: Always maintain as ‘0’ for lowest power consumption
bit 5 Unimplemented: Read as ‘0’
bit 4-0 PCFG<12:8>: Analog Port Configuration bits (AN12-AN8)
1 = Pin configured as a digital port
0 = Pin configured as an analog channel – digital input disabled and reads ‘0’
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DS39974A-page 372 Preliminary 2010 Microchip Technology Inc.
The analog reference voltage is software select-
able to either the device’s positive and negative
supply voltage (AVDD and AVSS), or the voltage
level on the RA3/AN3/C1INB/VREF+ and
RA2/AN2/C2INB/C1IND/C3INB/VREF-/CVREF pins.
The A/D Converter has a unique feature of being able
to operate while the device is in Sleep mode. To
operate in Sleep, the A/D conversion clock must be
derived from the A/D’s internal RC oscillator.
The output of the sample and hold is the input into the
converter, which generates the result via successive
approximation.
Each port pin associated with the A/D Converter can be
configured as an analog input or as a digital I/O. The
ADRESH and ADRESL registers contain the result of
the A/D conversion. When the A/D conversion is com-
plete, the result is loaded into the ADRESH:ADRESL
register pair, the GO/DONE bit (ADCON0<1>) is
cleared and the A/D Interrupt Flag bit, ADIF, is set.
A device Reset forces all registers to their Reset state.
This forces the A/D module to be turned off and any
conversion in progress is aborted. The value in the
ADRESH:ADRESL register pair is not modified for a
Power-on Reset (POR). These registers will contain
unknown data after a POR.
Figure 22-1 provides the block diagram of the A/D
module.
FIGUR E 22-1: A/D BLOCK DIAGRAM
(Input Voltage)
VAIN
VREF+
Reference
Voltage
VDD(2)
VCFG<1:0>
CHS<3:0>
AN7(1)
AN4
AN3
AN2
AN1
AN0
0111
0100
0011
0010
0001
0000
10/12-Bit
A/D
VREF-
VSS(2)
Converter
VBG
VDDCORE/VCAP
AN12
AN11
AN10
1111
1110
1100
1011
1010
Note 1: Channels, AN5, AN6 and AN7, are not available on 28-pin devices.
2: I/O pins have diode protection to VDD and VSS.
AN6(1)
0110
AN5(1)
0101
AN9
1001
AN8
1000
2010 Microchip Technology Inc. Preliminary DS39974A-page 373
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After the A/D module has been configured as desired,
the selected channel must be acquired before the
conversion is started. The analog input channels must
have their corresponding TRIS bits selected as inputs.
To determine acquisition time, see Section 22.1 “A/D
Acquisition Requirements”. After this acquisition
time has elapsed, the A/D conversion can be started.
An acquisition time can be programmed to occur
between setting the GO/DONE bit and the actual start
of the conversion.
The following steps should be followed to do an A/D
conversion:
1. Configure the A/D module:
• Configure the required ADC pins as analog
pins using ANCON0, ANCON1
• Set voltage reference using ADCON0
• Select A/D input channel (ADCON0)
• Select A/D acquisition time (ADCON1)
• Select A/D conversion clock (ADCON1)
• Turn on A/D module (ADCON0)
2. Configure A/D interrupt (if desired):
• Clear ADIF bit
• Set ADIE bit
•Set GIE bit
3. Wait the required acquisition time (if required).
4. Start conversion:
• Set GO/DONE bit (ADCON0<1>)
5. Wait for A/D conversion to complete, by either:
• Polling for the GO/DONE bit to be cleared
OR
• Waiting for the A/D interrupt
6. Read A/D Result registers (ADRESH:ADRESL);
clear bit, ADIF, if required.
7. For the next conversion, go to Step 1 or Step 2,
as required. The A/D conversion time per bit is
defined as T
AD. A minimum Wait of 2 TAD is
required before the next acquisition starts.
FIGURE 22-2: ANALOG INPUT MODEL
VAIN CPIN
RSANx
5 pF
VDD
VT = 0.6V
VT = 0.6V ILEAKAGE
RIC 1k
Sampling
Switch
SS RSS
CHOLD = 25 pF
VSS
Sampling Switch
1234
(k)
VDD
±100 nA
Legend: CPIN
VT
ILEAKAGE
RIC
SS
CHOLD
= Input Capacitance
= Threshold Voltage
= Leakage Current at the pin due to
= Interconnect Resistance
= Sampling Switch
= Sample/Hold Capacitance (from DAC)
various junctions
= Sampling Switch ResistanceRSS
PIC18F47J13 FAMILY
DS39974A-page 374 Preliminary 2010 Microchip Technology Inc.
22.1 A/D Acquisition Requirements
For the A/D Converter to meet its specified accuracy,
the charge holding capacitor (CHOLD) must be allowed
to fully charge to the input channel voltage level. The
analog input model is illustrated in Figure 22-2. The
source impedance (RS) and the internal sampling
switch (RSS) impedance directly affect the time
required to charge the capacitor, CHOLD. The sampling
switch (RSS) impedance varies over the device voltage
(VDD). The source impedance affects the offset voltage
at the analog input (due to pin leakage current). The
maximum recommended impedance for analog
sources is 2.5 k for 10-bit conversions and 1 k
for 12-bit conversions. After the analog input channel
is selected (changed), the channel must be sampled for
at least the minimum acquisition time before starting a
conversion.
To calculate the minimum acquisition time,
Equation 22-1 may be used. This equation assumes
that 1/2 LSb error is used (1,024 steps for the 10-bit
A/D). The 1/2 LSb error is the maximum error allowed
for the A/D to meet its specified resolution.
Equation 22-3 provides the calculation of the minimum
required acquisition time, T
ACQ. This calculation is
based on the following application system
assumptions:
EQUATION 22-1: ACQUISITION TIME
EQUATION 22-2: A/D MINIMUM CHARGING TIME
EQUATION 22-3: CALCULATING THE MINIMUM REQUIRED ACQUISITION TIME
Note: When the conversion is started, the
holding capacitor is disconnected from the
input pin.
CHOLD =25 pF
Rs = 2.5 k
Conversion Error 1/2 LSb
VDD =3VRss = 2 k
Temperature = 85C (system max.)
TACQ = Amplifier Settling Time + Holding Capacitor Charging Time + Temperature Coefficient
=T
AMP + TC + TCOFF
VHOLD = (VREF – (VREF/2048)) • (1 – e(-TC/CHOLD(RIC + RSS + RS)))
or
TC = -(CHOLD)(RIC + RSS + RS) ln(1/2048)
TACQ =TAMP + TC + TCOFF
TAMP =0.2 s
TCOFF = (Temp – 25°C)(0.02 s/°C)
(85°C – 25°C)(0.02 s/°C)
1.2 s
Temperature coefficient is only required for temperatures > 25°C. Below 25°C, TCOFF = 0 s.
TC = -(CHOLD)(RIC + RSS + RS) ln(1/2048) s
-(25 pF) (1 k + 2 k + 2.5 k) ln(0.0004883) s
1.05 s
TACQ =0.2 s + 1.05 s + 1.2 s
2.45 s
2010 Microchip Technology Inc. Preliminary DS39974A-page 375
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22.2 Selecting and Configuri ng
Auto mati c A c q u is i tion Time
The ADCON1 register allows the user to select an
acquisition time that occurs each time the GO/DONE
bit is set.
When the GO/DONE bit is set, sampling is stopped and
a conversion begins. The user is responsible for ensur-
ing the required acquisition time has passed between
selecting the desired input channel and setting the
GO/DONE bit. This occurs when the ACQT<2:0> bits
(ADCON1<5:3>) remain in their Reset state (‘000’) and
is compatible with devices that do not offer
programmable acquisition times.
If desired, the ACQT bits can be set to select a pro-
grammable acquisition time for the A/D module. When
the GO/DONE bit is set, the A/D module continues to
sample the input for the selected acquisition time, then
automatically begins a conversion. Since the acquisi-
tion time is programmed, there may be no need to wait
for an acquisition time between selecting a channel and
setting the GO/DONE bit.
In either case, when the conversion is completed, the
GO/DONE bit is cleared, the ADIF flag is set and the
A/D begins sampling the currently selected channel
again. If an acquisition time is programmed, there is
nothing to indicate if the acquisition time has ended or
if the conversion has begun.
22.3 Selecting the A/D Conversion
Clock
The A/D conversion time per bit is defined as TAD. The
A/D conversion requires 11 T
AD per 10-bit conversion
and 13 T
AD per 12-bit conversion. The source of the
A/D conversion clock is software selectable.
There are seven possible options for TAD:
•2 T
OSC
•4 TOSC
•8 TOSC
•16 TOSC
•32 TOSC
•64 T
OSC
• Internal RC Oscillator
For correct A/D conversions, the A/D conversion clock
(T
AD) must be as short as possible but greater than the
minimum TAD (see parameter 130 in Table 30-32 for
more information).
Table 22-1 provides the resultant T
AD times derived
from the device operating frequencies and the A/D
clock source selected.
TABLE 22-1: TAD vs. DEVICE OPERATING
FREQUENCIES
22.4 Configuring Anal og Port Pins
The ANCON0, ANCON1 and TRISA registers control
the operation of the A/D port pins. The port pins needed
as analog inputs must have their corresponding TRIS
bits set (input). If the TRIS bit is cleared (output), the
digital output level (VOH or VOL) will be converted.
The A/D operation is independent of the state of the
CHS<3:0> bits and the TRIS bits.
AD Clock Source
(TAD)Maximum Device
Frequency (MHz)(3)
Operation ADCS<2:0> 10-Bit Mode 12-Bit Mode
2 TOSC 000 2.86 2.5
4 TOSC 100 5.71 5
8 TOSC 001 11.43 10
16 TOSC 101 22.86 20
32 TOSC 010 45.71 40
64 TOSC 110 48 48
RC(2) 011 1(1) 1(1)
Note 1: The RC source has a typical TAD time of
4s.
2: For device frequencies above 1 MHz, the
device must be in Sleep mode for the
entire conversion or the A/D accuracy may
be out of specification.
3: Maximum conversion speeds are
achieved at the bolded device frequencies.
Note 1: When reading the PORT register, all pins
configured as analog input channels will
read as cleared (a low level). Pins config-
ured as digital inputs will convert an
analog input. Analog levels on a digitally
configured input will be accurately
converted.
2: Analog levels on any pin defined as a
digital input may cause the digital input
buffer to consume current out of the
device’s specification limits.
PIC18F47J13 FAMILY
DS39974A-page 376 Preliminary 2010 Microchip Technology Inc.
22.5 A/D Conversions
Figure 22-3 displays the operation of the A/D Converter
after the GO/DONE bit has been set and the
ACQT<2:0> bits are cleared. A conversion is started
after the following instruction to allow entry into Sleep
mode before the conversion begins.
Figure 22-4 displays the operation of the A/D Converter
after the GO/DONE bit has been set. The ACQT<2:0>
bits are set to ‘010’ and are selecting a 4 TAD
acquisition time before the conversion starts.
Clearing the GO/DONE bit during a conversion will
abort the current conversion. The A/D Result register
pair will NOT be updated with the partially completed
A/D conversion sample. This means the
ADRESH:ADRESL registers will continue to contain
the value of the last completed conversion (or the last
value written to the ADRESH:ADRESL registers).
After the A/D conversion is completed or aborted, a
2T
AD Wait is required before the next acquisition can
be started. After this Wait, acquisition on the selected
channel is automatically started.
22.6 Use of the S pecial Event Triggers
A/D conversion can be started by the Special Event
Trigger of any of these modules:
• ECCP2 – Requires CCP2M<3:0> bits
(CCP2CON<3:0>) set at ‘1011’
• CTMU – Requires the setting of the CTTRIG bit
(CTMUCONH<0>)
• Timer1 Overflow
•RTCC Alarm
To start an A/D conversion:
• The A/D module must be enabled (ADON = 1)
• The appropriate analog input channel selected
• The minimum acquisition period is set in one of
these ways:
- Timing provided by the user
- Selection made of an appropriate TACQ time
With these conditions met, the trigger sets the
GO/DONE bit and the A/D acquisition starts.
If the A/D module is not enabled (ADON = 0), the
module ignores the Special Event Trigger.
Note: The GO/DONE bit should NOT be set in
the same instruction that turns on the A/D. Note: With an ECCP2 trigger, Timer1 or Timer3
is cleared. The timers reset to automati-
cally repeat the A/D acquisition period with
minimal software overhead (moving
ADRESH:ADRESL to the desired loca-
tion). If the A/D module is not enabled, the
Special Event Trigger is ignored by the
module, but the timer’s counter resets.
REGISTER 22-6: ADCTRIG: A/D TRIGGER REGISTER (BANKED EB8h)
U-0 U-0 U-0 U-0 U-0 U-0 R/W-0 R/W-0
— — — — — — TRIGSEL1 TRIGSEL0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-2 Unimplemented: Read as ‘0’
bit 1-0 TRIGSEL<1:0>: Special Trigger Select bits
11 = Selects the special trigger from the RTCC
10 = Selects the special trigger from the Timer1
01 = Selects the special trigger from the CTMU
00 = Selects the special trigger from the ECCP2
2010 Microchip Technology Inc. Preliminary DS39974A-page 377
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FIGURE 22-3: A/D CONVERSION TAD CYCLES (ACQT<2:0> = 000, TACQ = 0)
FIGURE 22-4: A/D CONVERSION TAD CYCLES (ACQT<2:0> = 010, TACQ = 4 TAD)
22.7 A/D Converter Calibration
The A/D Converter in the PIC18F47J13 family of
devices includes a self-calibration feature, which com-
pensates for any offset generated within the module.
The calibration process is automated and is initiated by
setting the ADCAL bit (ADCON1<6>). The next time
the GO/DONE bit is set, the module will perform an off-
set calibration and store the result internally. Thus,
subsequent offsets will be compensated.
Example 22-1 provides an example of a calibration
routine.
The calibration process assumes that the device is in a
relatively steady-state operating condition. If A/D
calibration is used, it should be performed after each
device Reset or if there are other major changes in
operating conditions.
TAD1TAD2TAD3 TAD4TAD5TAD6 TAD7TAD8 TAD11
Set GO/DONE bit
Holding capacitor is disconnected from analog input (typically 100 ns)
TAD9 TAD10TCY - TAD
Next Q4: ADRESH/ADRESL are loaded, GO/DONE bit is cleared,
ADIF bit is set, holding capacitor is connected to analog input.
Conversion starts
b0
b9 b6 b5 b4 b3 b2 b1
b8 b7
1234567811
Set GO/DONE bit
(Holding capacitor is disconnected)
910
Next Q4: ADRESH:ADRESL are loaded, GO/DONE bit is cleared,
ADIF bit is set, holding capacitor is reconnected to analog input.
Conversion starts
1234
(Holding capacitor continues
acquiring input)
TACQT Cycles TAD Cycles
Automatic
Acquisition
Time
b0b9 b6 b5 b4 b3 b2 b1
b8 b7
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DS39974A-page 378 Preliminary 2010 Microchip Technology Inc.
22.8 Operation in Power-Managed
Modes
The selection of the automatic acquisition time and A/D
conversion clock is determined in part by the clock
source and frequency while in a power-managed
mode.
If the A/D is expected to operate while the device is in
a power-managed mode, the ACQT<2:0> and
ADCS<2:0> bits in ADCON1 should be updated in
accordance with the power-managed mode clock that
will be used. After the power-managed mode is entered
(either of the power-managed Run modes), an A/D
acquisition or conversion may be started. Once an
acquisition or conversion is started, the device should
continue to be clocked by the same power-managed
mode clock source until the conversion has been com-
pleted. If desired, the device may be placed into the
corresponding power-managed Idle mode during the
conversion.
If the power-managed mode clock frequency is less
than 1 MHz, the A/D RC clock source should be
selected.
Operation in Sleep mode requires the A/D RC clock to
be selected. If bits, ACQT<2:0>, are set to ‘000’ and a
conversion is started, the conversion will be delayed
one instruction cycle to allow execution of the SLEEP
instruction and entry to Sleep mode. The IDLEN and
SCS bits in the OSCCON register must have already
been cleared prior to starting the conversion.
EXAMPLE 22-1: SAMPLE A/D CALIBRATION ROUTINE
TABLE 22-2: SUMMARY OF A/D REGISTERS
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF
PIR1 PMPIF(1) ADIF RC1IF TX1IF SSP1IF CCP1IF TMR2IF TMR1IF
PIE1 PMPIE(1) ADIE RC1IE TX1IE SSP1IE CCP1IE TMR2IE TMR1IE
IPR1 PMPIP(1) ADIP RC1IP TX1IP SSP1IP CCP1IP TMR2IP TMR1IP
PIR2 OSCFIF CM2IF CM1IF —BCL1IF HLVDIF TMR3IF CCP2IF
PIE2 OSCFIE CM2IE CM1IE —BCL1IE HLVDIE TMR3IE CCP2IE
IPR2 OSCFIP CM2IP CM1IP —BCL1IP HLVDIP TMR3IP CCP2IP
ADCTRIG — — — — — — TRIGSEL1 TRIGSEL0
ADRESH A/D Result Register High Byte
ADRESL A/D Result Register Low Byte
ADCON0 VCFG1 VCFG0 CHS3 CHS3 CHS1 CHS0 GO/DONE ADON
ANCON0 PCFG7(1) PCFG6(1) PCFG5(1) PCFG4 PCFG3 PCFG2 PCFG1 PCFG0
ADCON1 ADFM ADCAL ACQT2 ACQT1 ACQT0 ADCS2 ADCS1 ADCS0
ANCON1 VBGEN r— PCFG12 PCFG11 PCFG10 PCFG9 PCFG8
CCP2CON P2M1 P2M0 DC2B1 DC2B0 CCP2M3 CCP2M2 CCP2M1 CCP2M0
PORTA RA7 RA6 RA5 — RA3 RA2 RA1 RA0
TRISA TRISA7 TRISA6 TRISA5 — TRISA3 TRISA2 TRISA1 TRISA0
Legend: — = unimplemented, read as ‘0’, r = reserved. Shaded cells are not used for A/D conversion.
Note 1: These bits are only available on 44-pin devices.
BCF ANCON0,PCFG0 ;Make Channel 0 analog
BSF ADCON0,ADON ;Enable A/D module
BSF ADCON1,ADCAL ;Enable Calibration
BSF ADCON0,GO ;Start a dummy A/D conversion
CALIBRATION ;
BTFSC ADCON0,GO ;Wait for the dummy conversion to finish
BRA CALIBRATION ;
BCF ADCON1,ADCAL ;Calibration done, turn off calibration enable
;Proceed with the actual A/D conversion
2010 Microchip Technology Inc. Preliminary DS39974A-page 379
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23.0 COMPARATOR MODULE
The analog comparator module contains three compar-
ators that can be independently configured in a variety of
ways. The inputs can be selected from the analog inputs
and two internal voltage references. The digital outputs
are available at the pin level and can also be read
through the control register. Multiple output and interrupt
event generation is also available. Figure 23-1 provides
a generic single comparator from the module.
Key features of the module are:
• Independent comparator control
• Programmable input configuration
• Output to both pin and register levels
• Programmable output polarity
• Independent interrupt generation for each
comparator with configurable interrupt-on-change
23.1 Registers
The CMxCON registers (Register 23-1) select the input
and output configuration for each comparator, as well
as the settings for interrupt generation.
The CMSTAT register (Register 23-2) provides the out-
put results of the comparators. The bits in this register
are read-only.
FIGURE 23-1: COMPARATOR SIMPLIFIED BLOCK DIAGRAM
Cx
VIN-
VIN+
COE CxOUT
0
1
0
1
CCH<1:0>
CxINB
CxINC
CxINA
CVREF
CON
Interrupt
Logic
EVPOL<1:0>
COUTx
(CMSTAT<2:0>)
CMxIF
CPOL
Polarity
Logic
CREF
2
3
CxIND
VIRV
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DS39974A-page 380 Preliminary 2010 Microchip Technology Inc.
REGISTER 23-1: CMxCON: COMP ARATO R CONTROL 1/2/ 3 REGISTER (1, ACCESS FD2h; 2, FD1h;
3, BANKED F25h)
R/W-0 R/W-0 R/W-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
CON COE CPOL EVPOL1 EVPOL0 CREF CCH1 CCH0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 CON: Comparator Enable bit
1 = Comparator is enabled
0 = Comparator is disabled
bit 6 COE: Comparator Output Enable bit
1 = Comparator output is present on the CxOUT pin (assigned in the PPS module)
0 = Comparator output is internal only
bit 5 CPOL: Comparator Output Polarity Select bit
1 = Comparator output is inverted
0 = Comparator output is not inverted
bit 4-3 EVPOL<1:0>: Interrupt Polarity Select bits
11 = Interrupt generation on any change of the output(1)
10 = Interrupt generation only on high-to-low transition of the output
01 = Interrupt generation only on low-to-high transition of the output
00 = Interrupt generation is disabled
bit 2 CREF: Comparator Reference Select bit (non-inverting input)
1 = Non-inverting input connects to the internal CVREF voltage
0 = Non-inverting input connects to the CxINA pin
bit 1-0 CCH<1:0>: Comparator Channel Select bits
11 = Inverting input of comparator connects to VIRV (0.6V)
10 = Inverting input of comparator connects to the CxIND pin
01 = Inverting input of comparator connects to the CxINC pin
00 = Inverting input of comparator connects to the CxINB pin
Note 1: The CMxIF is automatically set any time this mode is selected and must be cleared by the application after
the initial configuration.
2010 Microchip Technology Inc. Preliminary DS39974A-page 381
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REGISTER 23-2: CMSTAT: COMPARATOR STATUS REGISTER (ACCESS F70h)
U-0 U-0 U-0 U-0 U-0 R-1 R-1 R-1
— — — — — COUT3 COUT2 COUT1
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-3 Unimplemented: Read as ‘0’
bit 2-0 COUT<3:1>: Comparator x Status bits
(For example, COUT3 gives the status for Comparator 3.)
If CPOL (CMxCON<5>) = 0 (non-inverted polarity):
1 = Comparator VIN+ > VIN-
0 = Comparator VIN+ < VIN-
If CPOL = 1 (inverted polarity):
1 = Comparator VIN+ < VIN-
0 = Comparator VIN+ > VIN-
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DS39974A-page 382 Preliminary 2010 Microchip Technology Inc.
23.2 Comparator Operation
A single comparator is shown in Figure 23-2, along with
the relationship between the analog input levels and
the digital output. When the analog input at VIN+ is less
than the analog input, VIN-, the output of the compara-
tor is a digital low level. When the analog input at VIN+
is greater than the analog input, VIN-, the output of the
comparator is a digital high level. The shaded areas of
the output of the comparator, in Figure 23-2, represent
the uncertainty due to input offsets and response time.
FIGU RE 23-2: SINGLE CO MPARATO R
23.3 Comparator Response Time
Response time is the minimum time, after selecting a
new reference voltage or input source, before the
comparator output has a valid level. The response time
of the comparator differs from the settling time of the
voltage reference. Therefore, both of these times must
be considered when determining the total response to
a comparator input change. Otherwise, the maximum
delay of the comparators should be used (see
Section 30.0 “Electrical Characteristics”).
23.4 Analog Input Connection
Considerations
Figure 23-3 provides a simplified circuit for an analog
input. Since the analog pins are connected to a digital
output, they have reverse biased diodes to VDD and
VSS. The analog input, therefore, must be between VSS
and VDD. If the input voltage deviates from this range,
by more than 0.6V in either direction, one of the diodes
is forward biased and a latch-up condition may occur.
A maximum source impedance of 10 k is
recommended for the analog sources. Any external
component connected to an analog input pin, such as
a capacitor or a Zener diode, should have very little
leakage current.
FIGU RE 23-3: COMPARATOR AN ALO G INPUT MODE L
Output
VIN-
VIN+
–
+
VIN+
VIN-
Output
VA
RS < 10k
AIN
CPIN
5 pF
VDD
VT = 0.6V
VT = 0.6V
RIC
ILEAKAGE
±100 nA
VSS
Legend: CPIN = Input Capacitance
VT= Threshold Voltage
ILEAKAGE = Leakage Current at the pin due to various junctions
RIC = Interconnect Resistance
RS= Source Impedance
VA = Analog Voltage
Comparator
Input
2010 Microchip Technology Inc. Preliminary DS39974A-page 383
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23.5 Comparator Control and
Configuration
Each comparator has up to eight possible combina-
tions of inputs: up to four external analog inputs and
one of two internal voltage references.
Both comparators allow a selection of the signal from
pin, CxINA, or the voltage from the comparator refer-
ence (CVREF) on the non-inverting channel. This is
compared to either CxINB, CxINC, CxIND, CTMU or
the microcontroller’s fixed internal reference voltage
(VIRV, 0.6V nominal) on the inverting channel.
Table 23-1 provides the comparator inputs and outputs
tied to fixed I/O pins.
TABLE 23-1: COMPARATOR INPUTS AND
OUTPUTS
23.5.1 COMPARATOR ENABLE AND
INPUT SELECTION
Setting the CON bit of the CMxCON register
(CMxCON<7>) enables the comparator for operation.
Clearing the CON bit disables the comparator,
minimizing current consumption.
The CCH<1:0> bits in the CMxCON register
(CMxCON<1:0>) direct either one of three analog input
pins, or the Internal Reference Voltage (VIRV), to the
comparator, VIN-. Depending on the comparator oper-
ating mode, either an external or internal voltage
reference may be used. The analog signal present at
VIN- is compared to the signal at VIN+ and the digital
output of the comparator is adjusted accordingly.
The external reference is used when CREF = 0
(CMxCON<2>) and VIN+ is connected to the CxINA
pin. When external voltage references are used, the
comparator module can be configured to have the
reference sources externally. The reference signal
must be between VSS and VDD, and can be applied to
either pin of the comparator.
The comparator module also allows the selection of an
internally generated voltage reference (CVREF) from
the comparator voltage reference module. This module
is described in more detail in Section 23.0 “Comp a ra-
tor Module”. The reference from the comparator
voltage reference module is only available when
CREF = 1. In this mode, the internal voltage reference
is applied to the comparator’s VIN+ pin.
23.5.2 COMPARATOR ENABLE AND
OUTPUT SELECTION
The comparator outputs are read through the CMSTAT
register. The CMSTAT<0> reads the Comparator 1 out-
put, CMSTAT<1> reads the Comparator 2 output and
CMSTAT<2> reads the Comparator 3 output. These
bits are read-only.
The comparator outputs may also be directly output to
the RPn I/O pins by setting the COE bit (CMxCON<6>).
When enabled, multiplexers in the output path of the
pins switch to the output of the comparator.
By default, the comparator’s output is at logic high
whenever the voltage on VIN+ is greater than on VIN-.
The polarity of the comparator outputs can be inverted
using the CPOL bit (CMxCON<5>).
The uncertainty of each of the comparators is related to
the input offset voltage and the response time given in
the specifications, as discussed in Section 23.2
“Comp arator Operation”.
Comparator Input or Output I/O Pin
1
C1INA (VIN+) RA0
C1INB (VIN-) RA3
C1INC (VIN-) RA5
C1IND (VIN-) RA2
C1OUT Remapped
RPn
2
C2INA(VIN+) RA1
C2INB(VIN-) RA2
C2INC (VIN-) RB2
C2IND (VIN-) RC2
C2OUT Remapped
RPn
3
C3INA(VIN+) RB3
C3INB(VIN-) RA2
C3INC (VIN-) RB1
C3IND (VIN-) RB0
C3OUT Remapped
RPn
Note: The comparator input pin selected by
CCH<1:0> must be configured as an input
by setting both the corresponding TRIS bits
and PCFG bits in the ANCON1 register.
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DS39974A-page 384 Preliminary 2010 Microchip Technology Inc.
23.6 Comparator Interrupts
The comparator interrupt flag is set whenever any of
the following occurs:
• Low-to-high transition of the comparator output
• High-to-low transition of the comparator output
• Any change in the comparator output
The comparator interrupt selection is done by the
EVPOL<1:0> bits in the CMxCON register
(CMxCON<4:3>).
In order to provide maximum flexibility, the output of the
comparator may be inverted using the CPOL bit in the
CMxCON register (CMxCON<5>). This is functionally
identical to reversing the inverting and non-inverting
inputs of the comparator for a particular mode.
An interrupt is generated on the low-to-high or high-to-
low transition of the comparator output. This mode of
interrupt generation is dependent on EVPOL<1:0> in
the CMxCON register. When EVPOL<1:0> = 01 or 10,
the interrupt is generated on a low-to-high or high-to-
low transition of the comparator output. Once the
interrupt is generated, it is required to clear the interrupt
flag by software.
When EVPOL<1:0> = 11, the comparator interrupt flag
is set whenever there is a change in the output value of
either comparator. Software will need to maintain
information about the status of the output bits, as read
from CMSTAT<1:0>, to determine the actual change
that occurred. The CMxIF bits (PIR2<6:5>) are the
Comparator x Interrupt Flags. The CMxIF bits must be
reset by clearing them. Since it is also possible to write
a ‘1’ to this register, a simulated interrupt may be
initiated.
Table 23-2 provides the interrupt generation
corresponding to comparator input voltages and
EVPOL bit settings.
Both the CMxIE bits (PIE2<6:5>) and the PEIE bit
(INTCON<6>) must be set to enable the interrupt. In
addition, the GIE bit (INTCON<7>) must also be set.
If any of these bits are clear, the interrupt is not
enabled, though the CMxIF bits will still be set if an
interrupt condition occurs.
Figure 23-3 provides a simplified diagram of the
interrupt section.
TABLE 23-2: COMPARATOR INTERRUPT GENERATION
CPOL EVPOL<1:0> Comparator
Input Change COUTx Transition Interrupt
Generated
0
00 VIN+ > VIN- Low-to-High No
VIN+ < VIN-High-to-Low No
01 VIN+ > VIN- Low-to-High Yes
VIN+ < VIN-High-to-Low No
10 VIN+ > VIN- Low-to-High No
VIN+ < VIN-High-to-Low Yes
11 VIN+ > VIN- Low-to-High Yes
VIN+ < VIN-High-to-Low Yes
1
00 VIN+ > VIN-High-to-Low No
VIN+ < VIN- Low-to-High No
01 VIN+ > VIN-High-to-Low No
VIN+ < VIN- Low-to-High Yes
10 VIN+ > VIN-High-to-Low Yes
VIN+ < VIN- Low-to-High No
11 VIN+ > VIN-High-to-Low Yes
VIN+ < VIN- Low-to-High Yes
2010 Microchip Technology Inc. Preliminary DS39974A-page 385
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23.7 Comparator Operation During
Sleep
When a comparator is active and the device is placed
in Sleep mode, the comparator remains active and the
interrupt is functional, if enabled. This interrupt will
wake-up the device from Sleep mode when enabled.
Each operational comparator will consume additional
current. To minimize power consumption while in Sleep
mode, turn off the comparators (CON = 0) before
entering Sleep. If the device wakes up from Sleep, the
contents of the CMxCON register are not affected.
23.8 Effects of a Reset
A device Reset forces the CMxCON registers to their
Reset state. This forces both comparators and the
voltage reference to the OFF state.
TABLE 23-3: REGISTERS ASSOCIATED WITH COMPARATOR MODULE
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF
PIR2 OSCFIF CM2IF CM1IF —BCL1IF HLVDIF TMR3IF CCP2IF
PIR5 ——CM3IFTMR8IF TMR6IF TMR5IF TMR5GIF TMR1GIF
PIE2 OSCFIE CM2IE CM1IE —BCL1IE HLVDIE TMR3IE CCP2IE
PIE5 ——CM3IETMR8IE TMR6IE TMR5IE TMR5GIE TMR1GIE
IPR2 OSCFIP CM2IP CM1IP —BCL1IP HLVDIP TMR3IP CCP2IP
IPR5 ——CM3IPTMR8IP TMR6IP TMR5IP TMR5GIP TMR1GIP
CMxCON CON COE CPOL EVPOL1 EVPOL0 CREF CCH1 CCH0
CVRCON CVREN CVROE CVRR CVRSS CVR3 CVR2 CVR1 CVR0
CMSTAT — — — — —COUT3COUT2 COUT1
ANCON0 PCFG7(1) PCFG6(1) PCFG5(1) PCFG4 PCFG3 PCFG2 PCFG1 PCFG0
ANCON1 VBGEN ——PCFG12PCFG11 PCFG10 PCFG9 PCFG8
TRISA TRISA7 TRISA6 TRISA5 — TRISA3 TRISA2 TRISA1 TRISA0
Legend: — = unimplemented, read as ‘0’. Shaded cells are not related to comparator operation.
Note 1: These bits are not implemented on 28-pin devices.
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NOTES:
2010 Microchip Technology Inc. Preliminary DS39974A-page 387
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24.0 COMPARATOR VOLTAGE
REFERENC E MODULE
The comparator voltage reference is a 16-tap resistor
ladder network that provides a selectable reference
voltage. Although its primary purpose is to provide a
reference for the analog comparators, it may also be
used independently of them.
Figure 24-1 provides a block diagram of the module.
The resistor ladder is segmented to provide two ranges
of CVREF values and has a power-down function to
conserve power when the reference is not being used.
The module’s supply reference can be provided from
either device VDD/VSS or an external voltage reference.
FIGU RE 24-1: COMPARATOR VOLTAGE REF ER ENC E B LO CK D IA G RA M
16-to-1 MUX
CVR<3:0>
8R
R
CVREN
CVRSS = 0
VDD
VREF+CVRSS = 1
8R
CVRSS = 0
VREF-CVRSS = 1
R
R
R
R
R
R
16 Steps
CVRR
CVREF
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DS39974A-page 388 Preliminary 2010 Microchip Technology Inc.
24.1 Configuring the Comparator
Voltage Reference
The comparator voltage reference module is controlled
through the CVRCON register (Register 24-1). The
comparator voltage reference provides two ranges of
output voltage, each with 16 distinct levels. The range
to be used is selected by the CVRR bit (CVRCON<5>).
The primary difference between the ranges is the size
of the steps selected by the CVREF Selection bits
(CVR<3:0>), with one range offering finer resolution.
The equations used to calculate the output of the
comparator voltage reference are as follows:
EQUATION 24-1: CALCULATING OUTPUT
OF THE COMPARATOR
VOLTAGE REFERENCE
The comparator reference supply voltage can come
from either VDD and VSS, or the external VREF+ and
VREF- that are multiplexed with RA2 and RA3. The
voltage source is selected by the CVRSS bit
(CVRCON<4>).
The settling time of the comparator voltage reference
must be considered when changing the CVREF
output (see Table 30-2 in Section 30.0 “Electrical
Characteristics”).
When CVRR = 1 and CVRSS = 0:
CVREF = ((CVR<3:0>)/24) x (AVDD - AVSS)
When CVRR = 0 and CVRSS = 0:
CVREF =(CVRSRC/4) + ((CVR<3:0>)/32) x (AVDD - AVSS)
When CVRR = 1 and CVRSS = 1:
CVREF = ((CVR<3:0>)/24) x ((VREF+) – VREF-)
When CVRR = 0 and CVRSS = 1:
CVREF =(CVRSRC/4) + ((CVR<3:0>)/32) x ((VREF+) – VREF-)
REGISTER 24-1: CVR CON: COMPARATOR VOLTAGE REFERENCE CONTROL REGISTER (F53h)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CVREN CVROE(1) CVRR CVRSS CVR3 CVR2 CVR1 CVR0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 CVREN: Comparator Voltage Reference Enable bit
1 =CV
REF circuit is powered on
0 =CV
REF circuit is powered down
bit 6 CVROE: Comparator VREF Output Enable bit(1)
1 =CVREF voltage level is also output on the RA2/AN2//C2INB/C1IND/C3INB/VREF-/CVREF pin
0 =CV
REF voltage is disconnected from the RA2/AN2//C2INB/C1IND/C3INB/VREF-/CVREF pin
bit 5 CVRR: Comparator VREF Range Selection bit
1 = 0 to 0.667 CVRSRC with CVRSRC/24 step size (low range)
0 = 0.25 CVRSRC to 0.75 CVRSRC with CVRSRC/32 step size (high range)
bit 4 CVRSS: Comparator VREF Source Selection bit
1 = Comparator reference source, CVRSRC = (VREF+) – (VREF-)
0 = Comparator reference source, CVRSRC = AVDD – AVSS
bit 3-0 CVR<3:0>: Comparator VREF Value Selection bits (0 (CVR<3:0>) 15)
When CVRR = 1:
CVREF = ((CVR<3:0>)/24) (CVRSRC)
When CVRR = 0:
CVREF = (CVRSRC/4) + ((CVR<3:0>)/32) (CVRSRC)
Note 1: CVROE overrides the TRIS bit setting.
2010 Microchip Technology Inc. Preliminary DS39974A-page 389
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24.2 Voltage Reference Accuracy/Error
The full range of voltage reference cannot be realized
due to the construction of the module. The transistors
on the top and bottom of the resistor ladder network
(see Figure 24-1) keep CVREF from approaching the
reference source rails. The voltage reference is derived
from the reference source; therefore, the CVREF output
changes with fluctuations in that source. The tested
absolute accuracy of the voltage reference can be
found in Section 30.0 “Electrical Characteristics”.
24.3 Connection Considerations
The voltage reference module operates independently
of the comparator module. The output of the reference
generator may be connected to the RA2 pin if the
CVROE bit is set. Enabling the voltage reference out-
put onto RA2 when it is configured as a digital input will
increase current consumption. Connecting RA2 as a
digital output with CVRSS enabled will also increase
current consumption.
The RA2 pin can be used as a simple D/A output with
limited drive capability. Due to the limited current drive
capability, a buffer must be used on the voltage
reference output for external connections to VREF. See
Figure 24-2 for an example buffering technique.
24.4 Operation During Sleep
When the device wakes up from Sleep through an
interrupt or a Watchdog Timer time-out, the contents of
the CVRCON register are not affected. To minimize
current consumption in Sleep mode, the voltage
reference should be disabled.
24.5 Effects of a Reset
A device Reset disables the voltage reference by
clearing bit, CVREN (CVRCON<7>). This Reset also
disconnects the reference from the RA2 pin by clearing
bit, CVROE (CVRCON<6>) and selects the high-voltage
range by clearing bit, CVRR (CVRCON<5>). The CVR
value select bits are also cleared.
FIGU RE 24-2: CO MP ARA TO R VOLT AGE RE FER ENC E OUTP UT BU FFER EXAMPL E
TABLE 24-1: REGISTERS ASSOCIATED WITH COMPARATOR VOLTAGE REFERENCE
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
CVRCON CVREN CVROE CVRR CVRSS CVR3 CVR2 CVR1 CVR0
CM1CON CON COE CPOL EVPOL1 EVPOL0 CREF CCH1 CCH0
CM2CON CON COE CPOL EVPOL1 EVPOL0 CREF CCH1 CCH0
CM3CON CON COE CPOL EVPOL1 EVPOL0 CREF CCH1 CCH0
TRISA TRISA7 TRISA6 TRISA5 — TRISA3 TRISA2 TRISA1 TRISA0
ANCON0 PCFG7(1) PCFG6(1) PCFG5(1) PCFG4 PCFG3 PCFG2 PCFG1 PCFG0
Legend: — = unimplemented, read as ‘0’, r = reserved. Shaded cells are not used with the comparator voltage
reference.
Note 1: These bits are only available on 44-pin devices.
CVREF Output
+
–
CVREF
Module
Voltage
Reference
Output
Impedance
R(1)
RA2
Note 1: R is dependent upon the Comparator Voltage Reference Configuration bits, CVRCON<5> and CVRCON<3:0>.
PIC18F47J13
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NOTES:
2010 Microchip Technology Inc. Preliminary DS39974A-page 391
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25.0 HIGH/LOW VOLTAGE DETECT
(HLVD)
The High/Low-Voltage Detect (HLVD) module can be
used to monitor the absolute voltage on VDD or the
HLVDIN pin. This is a programmable circuit that allows
the user to specify both a device voltage trip point and
the direction of change from that point.
If the module detects an excursion past the trip point in
that direction, an interrupt flag is set. If the interrupt is
enabled, the program execution will branch to the inter-
rupt vector address and the software can then respond
to the interrupt.
The High/Low-Voltage Detect Control register
(Register 25-1) completely controls the operation of the
HLVD module. This allows the circuitry to be “turned
off” by the user under software control, which
minimizes the current consumption for the device.
Figure 25-1 provides a block diagram for the HLVD
module.
REGISTER 25-1: HLVDCON: HIGH/LOW-VOLT AGE DETECT CONTROL REGISTER (ACCESS F85h)
R/W-0 R-0 R-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
VDIRMAG BGVST IRVST HLVDEN HLVDL3(1) HLVDL2(1) HLVDL1(1) HLVDL0(1)
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 VDIRMAG: Voltage Direction Magnitude Select bit
1 = Event occurs when the voltage equals or exceeds the trip point (HLVDL<3:0>)
0 = Event occurs when the voltage equals or falls below the trip point (HLVDL<3:0>)
bit 6 BGVST: Band Gap Reference Voltages Stable Status Flag bit
1 = Indicates internal band gap voltage references is stable
0 = Indicates internal band gap voltage reference is not stable
bit 5 IRVST: Internal Reference Voltage Stable Flag bit
1 = Indicates that the voltage detect logic will generate the interrupt flag at the specified voltage range
0 = Indicates that the voltage detect logic will not generate the interrupt flag at the specified voltage
range and the HLVD interrupt should not be enabled
bit 4 HLVDEN: High/Low-Voltage Detect Power Enable bit
1 = HLVD is enabled
0 = HLVD is disabled
bit 3-0 HLVDL<3:0>: Voltage Detection Limit bits(1)
1111 = External analog input is used (input comes from the HLVDIN pin)
1110 = Maximum setting
.
.
.
0000 = Minimum setting
Note 1: See Table 30-8 in Secti on 30.0 “Ele ctric al Char acte ristic s” for specifications.
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The module is enabled by setting the HLVDEN bit.
Each time the module is enabled, the circuitry requires
some time to stabilize. The IRVST bit is a read-only bit
that indicates when the circuit is stable. The module
can generate an interrupt only after the circuit is stable
and IRVST is set.
The VDIRMAG bit determines the overall operation of
the module. When VDIRMAG is cleared, the module
monitors for drops in VDD below a predetermined set
point. When the bit is set, the module monitors for rises
in VDD above the set point.
25.1 Operation
When the HLVD module is enabled, a comparator uses
an internally generated reference voltage as the set
point. The set point is compared with the trip point,
where each node in the resistor divider represents a
trip point voltage. The “trip point” voltage is the voltage
level at which the device detects a high or low-voltage
event, depending on the configuration of the module.
When the supply voltage is equal to the trip point, the
voltage tapped off of the resistor array is equal to the
internal reference voltage generated by the voltage
reference module. The comparator then generates an
interrupt signal by setting the HLVDIF bit.
The trip point voltage is software programmable to any
one of 16 values. The trip point is selected by
programming the HLVDL<3:0> bits (HLVDCON<3:0>).
Additionally, the HLVD module allows the user to
supply the trip voltage to the module from an external
source. This mode is enabled when bits, HLVDL<3:0>,
are set to ‘1111’. In this state, the comparator input is
multiplexed from the external input pin, HLVDIN. This
gives users flexibility because it allows them to
configure the HLVD interrupt to occur at any voltage in
the valid operating range.
FIGU RE 25-1: HLVD MODU L E B L O CK D IA G RA M (W I TH E XT ERN AL INP UT)
Set
VDD
16-to-1 MUX
HLVDCON
HLVDL<3:0> Register
HLVDIN
VDD
Externally Generated
Trip Point
HLVDIF
HLVDEN
Inter na l Volt a ge
Reference
VDIRMAG
1.2V Typical
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25.2 HLVD Setup
To set up the HLVD module:
1. Disable the module by clearing the HLVDEN bit
(HLVDCON<4>).
2. Write the value to the HLVDL<3:0> bits that
select the desired HLVD trip point.
3. Set the VDIRMAG bit to detect one of the
following:
• High voltage (VDIRMAG = 1)
• Low voltage (VDIRMAG = 0)
4. Enable the HLVD module by setting the
HLVDEN bit.
5. Clear the HLVD Interrupt Flag, HLVDIF
(PIR2<2>), which may have been set from a
previous interrupt.
6. If interrupts are desired, enable the HLVD inter-
rupt by setting the HLVDIE and GIE/GIEH bits
(PIE2<2> and INTCON<7>).
An interrupt will not be generated until the
IRVST bit is set.
25.3 Current Consumption
When the module is enabled, the HLVD comparator
and voltage divider are enabled, and will consume
static current. The total current consumption, when
enabled, is specified in electrical specification
parameter, D022B (IHLVD) (Section 30.2 “DC Char-
acteristics: Power-Down and Supply Current
PIC18F47J13 Family (Industrial)”).
Depending on the application, the HLVD module does
not need to operate constantly. To decrease the current
requirements, the HLVD circuitry may only need to be
enabled for short periods where the voltage is checked.
After doing the check, the HLVD module may be
disabled.
25.4 HLVD Start-up Time
The internal reference voltage of the HLVD module,
specified in electrical specification parameter D420
(see Table 30-8 in Section 30.0 “Electrical Charac-
teristics”), may be used by other internal circuitry,
such as the Programmable Brown-out Reset (BOR).
If the HLVD or other circuits using the voltage reference
are disabled to lower the device’s current consumption,
the reference voltage circuit will require time to become
stable before a low or high-voltage condition can be
reliably detected. This start-up time, TIRVST, is an
interval that is independent of device clock speed. It is
specified in electrical specification, parameter 36
(Table 30-15).
The HLVD interrupt flag is not enabled until TIRVST has
expired and a stable reference voltage is reached. For
this reason, brief excursions beyond the set point may
not be detected during this interval. Refer to Figure 25-2
or Figure 25-3.
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FIGU RE 25-2: LOW-VOLTAGE DET EC T OP ER AT I ON (V DI RMA G = 0)
VHLVD
VDD
HLVDIF
VHLVD
VDD
Enable HLVD
TIRVST
HLVDIF may not be Set
Enable HLVD
HLVDIF
HLVDIF Cleared in Software
HLVDIF Cleared in Software
HLVDIF Cleared in Software,
CAS E 1:
CAS E 2:
HLVDIF Remains Set since HLVD Condition still Exists
TIRVST
Internal Reference is Stable
Internal Reference is Stable
IRVST
IRVST
2010 Microchip Technology Inc. Preliminary DS39974A-page 395
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FIGURE 25-3: HIGH-VOLTAGE DETECT OPERATION (VDIRMAG = 1)
25.5 Applications
In many applications, it is desirable to have the ability to
detect a drop below, or rise above, a particular threshold.
For general battery applications, Figure 25-4 provides
a possible voltage curve.
Over time, the device voltage decreases. When the
device voltage reaches voltage, VA, the HLVD logic
generates an interrupt at time, T
A. The interrupt could
cause the execution of an ISR, which would allow the
application to perform “housekeeping tasks” and
perform a controlled shutdown before the device
voltage exits the valid operating range at TB.
The HLVD, thus, would give the application a time
window, represented by the difference between TA and
TB, to safely exit.
FIGU RE 25- 4: TYPI CAL HIG H/
LOW-VOLT AGE DETECT
APPLIC ATION
VHLVD
VDD
HLVDIF
VHLVD
VDD
Enable HLVD
TIRVST
HLVDIF may not be Set
Enable HLVD
HLVDIF
HLVDIF Cleared in Software
HLVDIF Cleared in Software
HLVDIF Cleared in Software,
CASE 1:
CASE 2:
HLVDIF Remains Set since HLVD Condition still Exists
TIRVST
IRVST
Internal Reference is Stable
Internal Reference is Stable
IRVST
Time
Voltage
VA
VB
TATB
VA = HLVD trip point
VB = Minimum valid device
operating voltage
Legend:
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25.6 Operation During Sleep
When enabled, the HLVD circuitry continues to operate
during Sleep. If the device voltage crosses the trip
point, the HLVDIF bit will be set and the device will
wake-up from Sleep. Device execution will continue
from the interrupt vector address if interrupts have
been globally enabled.
25.7 Effects of a Reset
A device Reset forces all registers to their Reset state.
This forces the HLVD module to be turned off.
TABLE 25-1: REGISTERS ASSOCIATED WITH HIGH/LOW-VOLTAGE DETECT MODULE
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
HLVDCON VDIRMAG BGVST IRVST HLVDEN HLVDL3 HLVDL2 HLVDL1 HLVDL0
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF
PIR2 OSCFIF CM2IF CM1IF —BCL1IF HLVDIF TMR3IF CCP2IF
PIE2 OSCFIE CM2IE CM1IE —BCL1IE HLVDIE TMR3IE CCP2IE
IPR2 OSCFIP CM2IP CM1IP —BCL1IP HLVDIP TMR3IP CCP2IP
Legend: — = unimplemented, read as ‘0’. Shaded cells are unused by the HLVD module.
2010 Microchip Technology Inc. Preliminary DS39974A-page 397
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26.0 CHARGE TIME
MEASUREMENT UNIT (CTMU)
The Charge Time Measurement Unit (CTMU) is a
flexible analog module that provides accurate differen-
tial time measurement between pulse sources, as well
as asynchronous pulse generation. By working with
other on-chip analog modules, the CTMU can be used
to precisely measure time, measure capacitance,
measure relative changes in capacitance or generate
output pulses with a specific time delay. The CTMU is
ideal for interfacing with capacitive-based sensors.
The module includes the following key features:
• Up to 13 channels available for capacitive or time
measurement input
• On-chip precision current source
• Four-edge input trigger sources
• Polarity control for each edge source
• Control of edge sequence
• Control of response to edges
• Time measurement resolution of 1 nanosecond
• High-precision time measurement
• Time delay of external or internal signal
asynchronous to system clock
• Accurate current source suitable for capacitive
measurement
The CTMU works in conjunction with the A/D Converter
to provide up to 13 channels for time or charge
measurement, depending on the specific device and
the number of A/D channels available. When config-
ured for time delay, the CTMU is connected to one of
the analog comparators. The level-sensitive input edge
sources can be selected from four sources: two
external inputs, Timer1 or Output Compare Module 1.
Figure 26-1 provides a block diagram of the CTMU.
FIGU RE 26-1: CTM U BLO CK DI AGRAM
CTED1
CTED2
Current Source
Edge
Control
Logic
CTMUCONH:CTMUCONL
Pulse
Generator
A/D Converter Comparator 2
Input
Timer1
ECCP1
Current
Control
ITRIM<5:0>
IRNG<1:0>
CTMUICON
CTMU
Control
Logic
EDGEN
EDGSEQEN
EDG1SEL<1:0>
EDG1POL
EDG2SEL<1:0>
EDG2POL
EDG1STAT
EDG2STAT
TGEN
IDISSEN
CTPLS
Comparator 2 Output
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DS39974A-page 398 Preliminary 2010 Microchip Technology Inc.
26.1 CTMU Operation
The CTMU works by using a fixed current source to
charge a circuit. The type of circuit depends on the type
of measurement being made. In the case of charge
measurement, the current is fixed and the amount of
time the current is applied to the circuit is fixed. The
amount of voltage read by the A/D is then a measure-
ment of the capacitance of the circuit. In the case of
time measurement, the current, as well as the capaci-
tance of the circuit, is fixed. In this case, the voltage
read by the A/D is then representative of the amount of
time elapsed from the time the current source starts
and stops charging the circuit.
If the CTMU is being used as a time delay, both capaci-
tance and current source are fixed, as well as the voltage
supplied to the comparator circuit. The delay of a signal
is determined by the amount of time it takes the voltage
to charge to the comparator threshold voltage.
26.1.1 THEORY OF OPERATION
The operation of the CTMU is based on the following
equation for charge:
More simply, the amount of charge measured in
coulombs in a circuit is defined as current in amperes
(I) multiplied by the amount of time in seconds that the
current flows (t). Charge is also defined as the
capacitance in farads (C) multiplied by the voltage of
the circuit (V). It follows that:
The CTMU module provides a constant, known current
source. The A/D Converter is used to measure (V) in
the equation, leaving two unknowns: capacitance (C)
and time (t). The above equation can be used to calcu-
late capacitance or time, by either the relationship
using the known fixed capacitance of the circuit:
or by:
using a fixed time that the current source is applied to
the circuit.
26.1.2 CURRENT SOURCE
At the heart of the CTMU is a precision current source,
designed to provide a constant reference for measure-
ments. The level of current is user selectable across
three ranges or a total of two orders of magnitude, with
the ability to trim the output in ±2% increments
(nominal). The current range is selected by the
IRNG<1:0> bits (CTMUICON<1:0>), with a value of
‘01’ representing the lowest range.
Current trim is provided by the ITRIM<5:0> bits
(CTMUICON<7:2>). These six bits allow trimming of
the current source in steps of approximately 2% per
step. Note that half of the range adjusts the current
source positively and the other half reduces the current
source. A value of ‘000000’ is the neutral position (no
change). A value of ‘100001’ is the maximum negative
adjustment (approximately -62%) and ‘011111’ is the
maximum positive adjustment (approximately +62%).
26.1.3 EDGE SELECTION AND CONTROL
CTMU measurements are controlled by edge events
occurring on the module’s two input channels. Each
channel, referred to as Edge 1 and Edge 2, can be con-
figured to receive input pulses from one of the edge
input pins (CTED1 and CTED2), Timer1 or Output
Compare Module 1. The input channels are level-
sensitive, responding to the instantaneous level on the
channel rather than a transition between levels. The
inputs are selected using the EDG1SEL and EDG2SEL
bit pairs (CTMUCONL<3:2> and <6:5>).
In addition to source, each channel can be configured for
event polarity using the EDGE2POL and EDGE1POL
bits (CTMUCONL<7,4>). The input channels can also
be filtered for an edge event sequence (Edge 1 occur-
ring before Edge 2) by setting the EDGSEQEN bit
(CTMUCONH<2>).
26.1.4 EDGE STATUS
The CTMUCONL register also contains two status bits:
EDG2STAT and EDG1STAT (CTMUCONL<1:0>).
Their primary function is to show if an edge response
has occurred on the corresponding channel. The
CTMU automatically sets a particular bit when an edge
response is detected on its channel. The level-sensitive
nature of the input channels also means that the status
bits become set immediately if the channel’s configura-
tion is changed and is the same as the channel’s
current state.
The module uses the edge status bits to control the cur-
rent source output to external analog modules (such as
the A/D Converter). Current is only supplied to external
modules when only one (but not both) of the status bits
is set, and shuts current off when both bits are either
set or cleared. This allows the CTMU to measure cur-
rent only during the interval between edges. After both
status bits are set, it is necessary to clear them before
another measurement is taken. Both bits should be
cleared simultaneously, if possible, to avoid re-enabling
the CTMU current source.
In addition to being set by the CTMU hardware, the
edge status bits can also be set by software. This is
also the user’s application to manually enable or
disable the current source. Setting either one (but not
both) of the bits enables the current source. Setting or
clearing both bits at once disables the source.
I = C • dV
dT
ItCV.=
tCVI=
CItV=
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26.1.5 INTERRUPTS
The CTMU sets its interrupt flag (PIR3<2>) whenever
the current source is enabled, then disabled. An inter-
rupt is generated only if the corresponding interrupt
enable bit (PIE3<2>) is also set. If edge sequencing is
not enabled (i.e., Edge 1 must occur before Edge 2), it
is necessary to monitor the edge status bits and
determine which edge occurred last and caused the
interrupt.
26.2 CTMU Module Initialization
The following sequence is a general guideline used to
initialize the CTMU module:
1. Select the current source range using the IRNG
bits (CTMUICON<1:0>).
2. Adjust the current source trim using the ITRIM
bits (CTMUICON<7:2>).
3. Configure the edge input sources for Edge 1 and
Edge 2 by setting the EDG1SEL and EDG2SEL
bits (CTMUCONL<3:2> and <6:5>).
4. Configure the input polarities for the edge inputs
using the EDG1POL and EDG2POL bits
(CTMUCONL<7,4>). The default configuration
is for negative edge polarity (high-to-low
transitions).
5. Enable edge sequencing using the EDGSEQEN
bit (CTMUCONH<2>). By default, edge
sequencing is disabled.
6. Select the operating mode (Measurement or Time
Delay) with the TGEN bit (CTMUCONH<4>). The
default mode is Time/Capacitance Measurement.
7. Discharge the connected circuit by setting the
IDISSEN bit (CTMUCONH<1>). After waiting a
sufficient time for the circuit to discharge, clear
IDISSEN.
8. Disable the module by clearing the CTMUEN bit
(CTMUCONH<7>).
9. Enable the module by setting the CTMUEN bit.
10. Clear the Edge Status bits: EDG2STAT and
EDG1STAT (CTMUCONL<1:0>). Both bits
should be cleared simultaneously, if possible, to
avoid re-enabling the CTMU current source.
11. Enable both edge inputs by setting the EDGEN
bit (CTMUCONH<3>).
Depending on the type of measurement or pulse
generation being performed, one or more additional
modules may also need to be initialized and configured
with the CTMU module:
• Edge Source Generation: In addition to the
external edge input pins, both Timer1 and the
Output Compare/PWM1 module can be used as
edge sources for the CTMU.
• Capacitance or Time Measurement: The CTMU
module uses the A/D Converter to measure the
voltage across a capacitor that is connected to one
of the analog input channels.
• Pulse Generation: When generating system
clock, independent output pulses, the CTMU
module uses Comparator 2 and the associated
comparator voltage reference.
26.3 Calibrati ng the CTMU Module
The CTMU requires calibration for precise measure-
ments of capacitance and time, as well as for accurate
time delay. If the application only requires measurement
of a relative change in capacitance or time, calibration is
usually not necessary. An example of this type of appli-
cation would include a capacitive touch switch, in which
the touch circuit has a baseline capacitance, and the
added capacitance of the human body changes the
overall capacitance of a circuit.
If actual capacitance or time measurement is required,
two hardware calibrations must take place: the current
source needs calibration to set it to a precise current,
and the circuit being measured needs calibration to
measure and/or nullify all other capacitance other than
that to be measured.
26.3.1 CURRENT SOURCE CALIBRATION
The current source on board the CTMU module has a
range of ±62% nominal for each of three current
ranges. Therefore, for precise measurements, it is
possible to measure and adjust this current source by
placing a high-precision resistor, RCAL, onto an unused
analog channel. An example circuit is shown in
Figure 26-2. The current source measurement is
performed using the following steps:
1. Initialize the A/D Converter.
2. Initialize the CTMU.
3. Enable the current source by setting EDG1STAT
(CTMUCONL<0>).
4. Issue a time delay for voltage across RCAL to
stabilize and the ADC sample/hold capacitor to
charge.
5. Perform A/D conversion.
6. Calculate the present source current using
I=V/R
CAL, where RCAL is a high-precision
resistance and V is measured by performing an
A/D conversion.
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The CTMU current source may be trimmed with the
trim bits in CTMUICON using an iterative process to get
an exact desired current. Alternatively, the nominal
value without adjustment may be used; it may be
stored by the software for use in all subsequent
capacitive or time measurements.
To calculate the optimal value for RCAL, the nominal
current must be chosen. For example, if the A/D Con-
verter reference voltage is 3.3V, use 70% of full scale
or 2.31V as the desired approximate voltage to be read
by the A/D Converter. If the range of the CTMU current
source is selected to be 0.55 A, the resistor value
needed is calculated as RCAL = 2.31V/0.55 A, for a
value of 4.2 MΩ. Similarly, if the current source is
chosen to be 5.5 A, RCAL would be 420,000Ω, and
42,000Ω if the current source is set to 55 A.
FIGU RE 26-2: CT MU CURR ENT S OUR CE
CALIBRATION CIRCUIT
A value of 70% of full-scale voltage is chosen to make
sure that the A/D Converter is in a range that is well
above the noise floor. Keep in mind that if an exact cur-
rent is chosen that is to incorporate the trimming bits
from CTMUICON, the resistor value of RCAL may need
to be adjusted accordingly. RCAL may also be adjusted
to allow for available resistor values. RCAL should be of
the highest precision available, keeping in mind the
amount of precision needed for the circuit that the
CTMU will be used to measure. A recommended
minimum would be 0.1% tolerance.
The following examples show one typical method for
performing a CTMU current calibration. Example 26-1
demonstrates how to initialize the A/D Converter and
the CTMU. This routine is typical for applications using
both modules. Example 26-2 demonstrates one
method for the actual calibration routine.
A/D Converter
CTMU
ANx
RCAL
Current Source
MUX
A/D
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EXAMPLE 26-1: SETUP FOR CTMU CALIBRATION ROUTINES
#include <p18cxxx.h>
/**************************************************************************/
/*Setup CTMU *****************************************************************/
/**************************************************************************/
void setup(void)
{ //CTMUCON - CTMU Control register
CTMUCONH = 0x00; //make sure CTMU is disabled
CTMUCONL = 0x90;
//CTMU continues to run when emulator is stopped,CTMU continues
//to run in idle mode,Time Generation mode disabled, Edges are blocked
//No edge sequence order, Analog current source not grounded, trigger
//output disabled, Edge2 polarity = positive level, Edge2 source =
//source 0, Edge1 polarity = positive level, Edge1 source = source 0,
//CTMUICON - CTMU Current Control Register
CTMUICON = 0x01; //0.55uA, Nominal - No Adjustment
/**************************************************************************/
//Setup AD converter;
/**************************************************************************/
TRISA=0x04; //set channel 2 as an input
// Configured AN2 as an analog channel
// ANCON0
ANCON0 = 0xFB;
// ANCON1
ANCON1 = 0x1F;
// ADCON1
ADCON1bits.ADFM=1; // Result format 1= Right justified
ADCON1bits.ADCAL=0; // Normal A/D conversion operation
ADCON1bits.ACQT=1; // Acquisition time 7 = 20TAD 2 = 4TAD 1=2TAD
ADCON1bits.ADCS=2; // Clock conversion bits 6= FOSC/64 2=FOSC/32
// ADCON0
ADCON0bits.VCFG0 =0; // Vref+ = AVdd
ADCON0bits.VCFG1 =0; // Vref- = AVss
ADCON0bits.CHS=2; // Select ADC channel
ADCON0bits.ADON=1; // Turn on ADC
}
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EXAMPLE 26-2: CURRENT CALIBRATION ROUTINE
#include "p18cxxx.h"
#define COUNT 500 //@ 8MHz = 125uS.
#define DELAY for(i=0;i<COUNT;i++)
#define RCAL .027 //R value is 4200000 (4.2M)
//scaled so that result is in
//1/100th of uA
#define ADSCALE 1023 //for unsigned conversion 10 sig bits
#define ADREF 3.3 //Vdd connected to A/D Vr+
int main(void)
{
int i;
int j = 0; //index for loop
unsigned int Vread = 0;
double VTot = 0;
float Vavg=0, Vcal=0, CTMUISrc = 0; //float values stored for calcs
//assume CTMU and A/D have been setup correctly
//see Example 25-1 for CTMU & A/D setup
setup();
CTMUCONHbits.CTMUEN = 1; //Enable the CTMU
CTMUCONLbits.EDG1STAT = 0; // Set Edge status bits to zero
CTMUCONLbits.EDG2STAT = 0;
for(j=0;j<10;j++)
{
CTMUCONHbits.IDISSEN = 1; //drain charge on the circuit
DELAY; //wait 125us
CTMUCONHbits.IDISSEN = 0; //end drain of circuit
CTMUCONLbits.EDG1STAT = 1; //Begin charging the circuit
//using CTMU current source
DELAY; //wait for 125us
CTMUCONLbits.EDG1STAT = 0; //Stop charging circuit
PIR1bits.ADIF = 0; //make sure A/D Int not set
ADCON0bits.GO=1; //and begin A/D conv.
while(!PIR1bits.ADIF); //Wait for A/D convert complete
Vread = ADRES; //Get the value from the A/D
PIR1bits.ADIF = 0; //Clear A/D Interrupt Flag
VTot += Vread; //Add the reading to the total
}
Vavg = (float)(VTot/10.000); //Average of 10 readings
Vcal = (float)(Vavg/ADSCALE*ADREF);
CTMUISrc = Vcal/RCAL; //CTMUISrc is in 1/100ths of uA
}
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26.3.2 CAPACITANCE CALIBRATION
There is a small amount of capacitance from the inter-
nal A/D Converter sample capacitor as well as stray
capacitance from the circuit board traces and pads that
affect the precision of capacitance measurements. A
measurement of the stray capacitance can be taken by
making sure the desired capacitance to be measured
has been removed. The measurement is then
performed using the following steps:
1. Initialize the A/D Converter and the CTMU.
2. Set EDG1STAT (= 1).
3. Wait for a fixed delay of time, t.
4. Clear EDG1STAT.
5. Perform an A/D conversion.
6. Calculate the stray and A/D sample capacitances:
where I is known from the current source measurement
step, t is a fixed delay and V is measured by performing
an A/D conversion.
This measured value is then stored and used for
calculations of time measurement or subtracted for
capacitance measurement. For calibration, it is
expected that the capacitance of CSTRAY +CAD is
approximately known. CAD is approximately 4 pF.
An iterative process may need to be used to adjust the
time, t, that the circuit is charged to obtain a reasonable
voltage reading from the A/D Converter. The value of t
may be determined by setting COFFSET to a theoretical
value, then solving for t. For example, if CSTRAY is
theoretically calculated to be 11 pF, and V is expected
to be 70% of VDD or 2.31V, then t would be:
or 63 s.
See Example 26-3 for a typical routine for CTMU
capacitance calibration.
COFFSET CSTRAY CAD
+ItV==
(4 pF + 11 pF) • 2.31V/0.55 A
PIC18F47J13 FAMILY
DS39974A-page 404 Preliminary 2010 Microchip Technology Inc.
EXAMP LE 26-3 : CAP AC IT ANC E CA LIBR ATIO N ROUTI NE
#include "p18cxxx.h"
#define COUNT 25 //@ 8MHz INTFRC = 62.5 us.
#define ETIME COUNT*2.5 //time in uS
#define DELAY for(i=0;i<COUNT;i++)
#define ADSCALE 1023 //for unsigned conversion 10 sig bits
#define ADREF 3.3 //Vdd connected to A/D Vr+
#define RCAL .027 //R value is 4200000 (4.2M)
//scaled so that result is in
//1/100th of uA
int main(void)
{
int i;
int j = 0; //index for loop
unsigned int Vread = 0;
float CTMUISrc, CTMUCap, Vavg, VTot, Vcal;
//assume CTMU and A/D have been setup correctly
//see Example 25-1 for CTMU & A/D setup
setup();
CTMUCONHbits.CTMUEN = 1; // Enable the CTMU
CTMUCONLbits.EDG1STAT = 0; // Set Edge status bits to zero
CTMUCONLbits.EDG2STAT = 0;
for(j=0;j<10;j++)
{
CTMUCONHbits.IDISSEN = 1; //drain charge on the circuit
DELAY; //wait 125us
CTMUCONHbits.IDISSEN = 0; //end drain of circuit
CTMUCONLbits.EDG1STAT = 1; //Begin charging the circuit
//using CTMU current source
DELAY; //wait for 125us
CTMUCONLbits.EDG1STAT = 0; //Stop charging circuit
PIR1bits.ADIF = 0; //make sure A/D Int not set
ADCON0bits.GO=1; //and begin A/D conv.
while(!PIR1bits.ADIF); //Wait for A/D convert complete
Vread = ADRES; //Get the value from the A/D
PIR1bits.ADIF = 0; //Clear A/D Interrupt Flag
VTot += Vread; //Add the reading to the total
}
Vavg = (float)(VTot/10.000); //Average of 10 readings
Vcal = (float)(Vavg/ADSCALE*ADREF);
CTMUISrc = Vcal/RCAL; //CTMUISrc is in 1/100ths of uA
CTMUCap = (CTMUISrc*ETIME/Vcal)/100;
}
2010 Microchip Technology Inc. Preliminary DS39974A-page 405
PIC18F47J13 FAMILY
26.4 Measuring Capacitance with the
CTMU
There are two separate methods of measuring capaci-
tance with the CTMU. The first is the absolute method,
in which the actual capacitance value is desired. The
second is the relative method, in which the actual
capacitance is not needed, rather an indication of a
change in capacitance is required.
26.4.1 ABSOLUTE CAPACITANCE
MEASUREMENT
For absolute capacitance measurements, both the
current and capacitance calibration steps found in
Section 26.3 “Calibrating the CTMU Module”
should be followed. Capacitance measurements are
then performed using the following steps:
1. Initialize the A/D Converter.
2. Initialize the CTMU.
3. Set EDG1STAT.
4. Wait for a fixed delay, T.
5. Clear EDG1STAT.
6. Perform an A/D conversion.
7. Calculate the total capacitance, CTOTAL = (I * T)/V,
where I is known from the current source
measurement step (see Section 26.3.1 “Current
Sourc e Calibrat ion”), T is a fixed delay and V is
measured by performing an A/D conversion.
8. Subtract the stray and A/D capacitance
(COFFSET from Section 26.3.2 “Capacitance
Calibration”) from CTOTAL to determine the
measured capacitance.
26.4.2 CAPACITIVE TOUCH SENSE USING
RELATIVE CHARGE
MEASUREMENT
An application may not require precise capacitance
measurements. For example, when detecting a valid
press of a capacitance-based touch sense button,
detecting a relative change of capacitance is of inter-
est. In this type of application, when the touch sense
pad is not being pressed, the total capacitance is the
capacitance of the combination of the board traces, the
A/D Converter, etc. A larger voltage will be measured
by the A/D Converter. When the touch sense pad is
pressed, the total capacitance is larger due to the addi-
tion of the capacitance of the human body, therefore, a
smaller voltage will be measured by the A/D Converter.
Detecting capacitance changes is easily accomplished
with the CTMU using these steps:
1. Initialize the A/D Converter and the CTMU.
2. Set EDG1STAT.
3. Wait for a fixed delay.
4. Clear EDG1STAT.
5. Perform an A/D conversion.
The voltage measured by performing the A/D conver-
sion is an indication of the relative capacitance. Note
that in this case, no calibration of the current source or
circuit capacitance measurement is needed. See
Example 26-4 for a sample software routine for a
capacitive touch switch.
PIC18F47J13 FAMILY
DS39974A-page 406 Preliminary 2010 Microchip Technology Inc.
EXAMPLE 26-4: ROUTINE FOR CAPACITIVE TOUCH SWITCH
#include "p18cxxx.h"
#define COUNT 500 //@ 8MHz = 125uS.
#define DELAY for(i=0;i<COUNT;i++)
#define OPENSW 1000 //Un-pressed switch value
#define TRIP 300 //Difference between pressed
//and un-pressed switch
#define HYST 65 //amount to change
//from pressed to un-pressed
#define PRESSED 1
#define UNPRESSED 0
int main(void)
{
unsigned int Vread; //storage for reading
unsigned int switchState;
int i;
//assume CTMU and A/D have been setup correctly
//see Example 25-1 for CTMU & A/D setup
setup();
CTMUCONHbits.CTMUEN = 1; // Enable the CTMU
CTMUCONLbits.EDG1STAT = 0; // Set Edge status bits to zero
CTMUCONLbits.EDG2STAT = 0;
CTMUCONHbits.IDISSEN = 1; //drain charge on the circuit
DELAY; //wait 125us
CTMUCONHbits.IDISSEN = 0; //end drain of circuit
CTMUCONLbits.EDG1STAT = 1; //Begin charging the circuit
//using CTMU current source
DELAY; //wait for 125us
CTMUCONLbits.EDG1STAT = 0; //Stop charging circuit
PIR1bits.ADIF = 0; //make sure A/D Int not set
ADCON0bits.GO=1; //and begin A/D conv.
while(!PIR1bits.ADIF); //Wait for A/D convert complete
Vread = ADRES; //Get the value from the A/D
if(Vread < OPENSW - TRIP)
{
switchState = PRESSED;
}
else if(Vread > OPENSW - TRIP + HYST)
{
switchState = UNPRESSED;
}
}
2010 Microchip Technology Inc. Preliminary DS39974A-page 407
PIC18F47J13 FAMILY
26.5 Measuring T ime with the CTMU
Module
Time can be precisely measured after the ratio (C/I) is
measured from the current and capacitance calibration
step by following these steps:
1. Initialize the A/D Converter and the CTMU.
2. Set EDG1STAT.
3. Set EDG2STAT.
4. Perform an A/D conversion.
5. Calculate the time between edges as T = (C/ I) * V,
where I is calculated in the current calibration step
(Section 26.3.1 “Current Source Calibration”),
C is calculated in the capacitance calibration step
(S ection 26.3.2 “Cap acit ance Calib ration”) and
V is measured by performing the A/D conversion.
It is assumed that the time measured is small enough
that the capacitance, CAD + CEXT, provides a valid
voltage to the A/D Converter. For the smallest time
measurement, always set the A/D Channel Select
register (AD1CHS) to an unused A/D channel; the cor-
responding pin for which is not connected to any circuit
board trace. This minimizes added stray capacitance,
keeping the total circuit capacitance close to that of the
A/D Converter itself (4-5 pF). To measure longer time
intervals, an external capacitor may be connected to an
A/D channel and this channel selected when making a
time measurement.
FIGU RE 26-3: TYPI CA L C ONN ECT I ON S AN D IN T ERN AL CO NFI G UR AT ION F OR TIME
MEASUREMENT
A/D Converter
CTMU
CTED1
CTED2
ANX
EDG1
EDG2
CAD
CEXT
Current Source
PIC18F47J13
A/D Voltage
PIC18F47J13 FAMILY
DS39974A-page 408 Preliminary 2010 Microchip Technology Inc.
26.6 Creating a Delay with the CTMU
Module
A unique feature on board the CTMU module is its ability
to generate system clock independent output pulses
based on either an external voltage or an external
capacitor value. When using an external voltage, this is
accomplished using the CTDIN input pin as a trigger for
the pulse delay. When using an external capacitor
value, this is accomplished using the internal compara-
tor voltage reference module and Comparator 2 input
pin.The pulse is output onto the CTPLS pin. To enable
this mode, set the TGEN bit.
See Figure 26-4 for an example circuit. When
CTMUDS (ODCON3<0>) is cleared, the pulse delay is
determined by the output of Comparator 2, and when it
is set, the pulse delay is determined by the input of
CTDIN. CDELAY is chosen by the user to determine the
output pulse width on CTPLS. The pulse width is calcu-
lated by T = (CDELAY/I)*V, where I is known from the
current source measurement step (Section 26.3.1
“Current Source Calibration”) and V is the internal
reference voltage (CVREF).
An example use of the external capacitor feature is
interfacing with variable capacitive-based sensors,
such as a humidity sensor. As the humidity varies, the
pulse-width output on CTPLS will vary. An example use
of the CTDIN feature is interfacing with a digital sensor.
The CTPLS output pin can be connected to an input
capture pin and the varying pulse width measured to
determine the sensor’s output in the application.
To use this feature:
1. If CTMUDS is cleared, initialize Comparator 2.
2. If CTMUDS is cleared, initialize the comparator
voltage reference.
3. Initialize the CTMU and enable time delay
generation by setting the TGEN bit.
4. Set EDG1STAT.
When CTMUDS is cleared, as soon as CDELAY
charges to the value of the voltage reference trip point,
an output pulse is generated on CTPLS. When
CTMUDS is set, as soon as CTDIN is set, an output
pulse is generated on CTPLS.
FIGU RE 26-4: TYPI CA L C ONN E CT I ON S AN D IN T ERN AL CONF I G UR ATIO N F OR P U LS E D EL AY
GENERATION
C2
CVREF
CTPLS
Current Source
Comparator
CTMU
CTEDG1
C2INB
CDELAY
EDG1
PIC18F47J13
1
0
CTMUDS CTDIN
2010 Microchip Technology Inc. Preliminary DS39974A-page 409
PIC18F47J13 FAMILY
26.7 Operation During Sleep/Idle
Modes
26.7.1 SLEEP MODE AND DEEP SLEEP
MODES
When the device enters any Sleep mode, the CTMU
module current source is always disabled. If the CTMU
is performing an operation that depends on the current
source when Sleep mode is invoked, the operation may
not terminate correctly. Capacitance and time
measurements may return erroneous values.
26.7.2 IDLE MODE
The behavior of the CTMU in Idle mode is determined
by the CTMUSIDL bit (CTMUCONH<5>). If CTMUSIDL
is cleared, the module will continue to operate in Idle
mode. If CTMUSIDL is set, the module’s current source
is disabled when the device enters Idle mode. In this
case, if the module is performing an operation when
Idle mode is invoked, the results will be similar to those
with Sleep mode.
26.8 Effects of a Reset on CTMU
Upon Reset, all registers of the CTMU are cleared. This
leaves the CTMU module disabled; its current source is
turned off and all configuration options return to their
default settings. The module needs to be re-initialized
following any Reset.
If the CTMU is in the process of taking a measurement
at the time of Reset, the measurement will be lost. A
partial charge may exist on the circuit that was being
measured, and should be properly discharged before
the CTMU makes subsequent attempts to make a
measurement. The circuit is discharged by setting and
then clearing the IDISSEN bit (CTMUCONH<1>) while
the A/D Converter is connected to the appropriate
channel.
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DS39974A-page 410 Preliminary 2010 Microchip Technology Inc.
26.9 Registers
There are three control registers for the CTMU:
• CTMUCONH
• CTMUCONL
• CTMUICON
The CTMUCONH and CTMUCONL registers
(Register 26-1 and Register 26-2) contain control bits
for configuring the CTMU module edge source selec-
tion, edge source polarity selection, edge sequencing,
A/D trigger, analog circuit capacitor discharge and
enables. The CTMUICON register (Register 26-3) has
bits for selecting the current source range and current
source trim.
REGISTER 26-1: CTMUCONH: CTMU CONTROL REGISTER HIGH (ACCESS FB3h)
R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CTMUEN — CTMUSIDL TGEN EDGEN EDGSEQEN IDISSEN CTTRIG
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 CTMUEN: CTMU Enable bit
1 = Module is enabled
0 = Module is disabled
bit 6 Unimplemented: Read as ‘0’
bit 5 CTMUSIDL: Stop in Idle Mode bit
1 = Discontinue module operation when device enters Idle mode
0 = Continue module operation in Idle mode
bit 4 TGEN: Time Generation Enable bit
1 = Enables edge delay generation
0 = Disables edge delay generation
bit 3 EDGEN: Edge Enable bit
1 = Edges are not blocked
0 = Edges are blocked
bit 2 EDGSEQEN: Edge Sequence Enable bit
1 = Edge 1 event must occur before Edge 2 event can occur
0 = No edge sequence is needed
bit 1 IDISSEN: Analog Current Source Control bit
1 = Analog current source output is grounded
0 = Analog current source output is not grounded
bit 0 CTTRIG: CTMU Special Event Trigger bit
1 = CTMU Special Event Trigger is enabled
0 = CTMU Special Event Trigger is disabled
2010 Microchip Technology Inc. Preliminary DS39974A-page 411
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REGISTER 26-2: CTMUCONL: CTMU CONTROL REGISTER LOW (ACCESS FB2h)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-x R/W-x
EDG2POL EDG2SEL1 EDG2SEL0 EDG1POL EDG1SEL1 EDG1SEL0 EDG2STAT EDG1STAT
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 EDG2POL: Edge 2 Polarity Select bit
1 = Edge 2 is programmed for a positive edge response
0 = Edge 2 is programmed for a negative edge response
bit 6-5 EDG2SEL<1:0>: Edge 2 Source Select bits
11 = CTED1 pin
10 = CTED2 pin
01 = ECCP1 output compare module
00 = Timer1 module
bit 4 EDG1POL: Edge 1 Polarity Select bit
1 = Edge 1 is programmed for a positive edge response
0 = Edge 1 is programmed for a negative edge response
bit 3-2 EDG1SEL<1:0>: Edge 1 Source Select bits
11 = CTED1 pin
10 = CTED2 pin
01 = ECCP1 output compare module
00 = Timer1 module
bit 1 EDG2STAT: Edge 2 Status bit
1 = Edge 2 event has occurred
0 = Edge 2 event has not occurred
bit 0 EDG1STAT: Edge 1 Status bit
1 = Edge 1 event has occurred
0 = Edge 1 event has not occurred
PIC18F47J13 FAMILY
DS39974A-page 412 Preliminary 2010 Microchip Technology Inc.
REGISTER 26-3: CTMUICON: CTMU CURRENT CONTROL REGISTER (ACCESS FB1h)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
ITRIM5 ITRIM4 ITRIM3 ITRIM2 ITRIM1 ITRIM0 IRNG1 IRNG0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-2 ITRIM<5:0>: Current Source Trim bits
011111 = Maximum positive change (+62% typ.) from nominal current
011110
.
.
.
000001 = Minimum positive change (+2% typ.) from nominal current
000000 = Nominal current output specified by IRNG<1:0>
111111 = Minimum negative change (-2% typ.) from nominal current
.
.
.
100010
100001 = Maximum negative change (-62% typ.) from nominal current
bit 1-0 IRNG<1:0>: Current Source Range Select bits
11 = 100 Base current
10 = 10 Base current
01 = Base current level (0.55 A nominal)
00 = Current source disabled
REGISTER 26-4: ODCON3: PERIPHERAL OPEN-DRAIN CONTROL REGISTER 3 (BANKED F40h)
R/W-0 U-0 U-0 U-0 U-0 U-0 R/W-0 R/W-0
CTMUDS — — — — — SPI2OD SPI1OD
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 CTMUDS: CTMU Pulse Delay Enable bit
1 = Pulse delay input for CTMU enabled on pin RA1
bit 6-2 Unimplemented: Read as ‘0’
bit 1 SPI2OD: SPI2 Open-Drain Output Enable bit
1 = Open-drain capability is enabled
0 = Open-drain capability is disabled
bit 0 SPI1OD: SPI1 Open-Drain Output Enable bit
1 = Open-drain capability is enabled
0 = Open-drain capability is disabled
2010 Microchip Technology Inc. Preliminary DS39974A-page 413
PIC18F47J13 FAMILY
TABLE 26-1: REGISTERS ASSOCIATED WITH CTMU MODULE
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
CTMUCONH CTMUEN — CTMUSIDL TGEN EDGEN EDGSEQEN IDISSEN CTTRIG
CTMUCONL EDG2POL EDG2SEL1 EDG2SEL0 EDG1POL EDG1SEL1 EDG1SEL0 EDG2STAT EDG1STAT
CTMUICON ITRIM5 ITRIM4 ITRIM3 ITRIM2 ITRIM1 ITRIM0 IRNG1 IRNG0
PIR3 SSP2IF BCL2IF RC2IF TX2IF TMR4IF CTMUIF TMR3GIF RTCCIF
PIE3 SSP2IE BCL2IE RC2IE TX2IE TMR4IE CTMUIE TMR3GIE RTCCIE
IPR3 SSP2IP BCL2IP RC2IP TX2IP TMR4IP CTMUIP TMR3GIP RTCCIP
ODCON3 CTMUDS — — — — — SPI2OD SPI1OD
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used during CTMU module.
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DS39974A-page 414 Preliminary 2010 Microchip Technology Inc.
NOTES:
2010 Microchip Technology Inc. Preliminary DS39974A-page 415
PIC18F47J13 FAMILY
27.0 SPECIAL FEATURES OF THE
CPU
PIC18F47J13 family devices include several features
intended to maximize reliability and minimize cost
through elimination of external components. These are:
• Oscillator Selection
• Resets:
- Power-on Reset (POR)
- Power-up Timer (PWRT)
- Oscillator Start-up Timer (OST)
- Brown-out Reset (BOR)
• Interrupts
• Watchdog Timer (WDT)
• Fail-Safe Clock Monitor (FSCM)
• Two-Speed Start-up
• Code Protection
• In-Circuit Serial Programming (ICSP)
The oscillator can be configured for the application
depending on frequency, power, accuracy and cost. All
of the options are discussed in detail in Section 3.0
“Oscillator Configurations”.
A complete discussion of device Resets and interrupts
is available in previous sections of this data sheet. In
addition to their Power-up and Oscillator Start-up
Timers provided for Resets, the PIC18F47J13 family of
devices has a configurable Watchdog Timer (WDT),
which is controlled in software.
The inclusion of an internal RC oscillator also provides
the additional benefits of a Fail-Safe Clock Monitor
(FSCM) and Two-Speed Start-up. FSCM provides for
background monitoring of the peripheral clock and
automatic switchover in the event of its failure.
Two-Speed Start-up enables code to be executed
almost immediately on start-up, while the primary clock
source completes its start-up delays.
All of these features are enabled and configured by
setting the appropriate Configuration register bits.
27.1 Configurati on Bits
The Configuration bits can be programmed to select
various device configurations. The configuration data is
stored in the last four words of Flash program memory;
Figure 6-1 depicts this. The configuration data gets
loaded into the volatile Configuration registers,
CONFIG1L through CONFIG4H, which are readable
and mapped to program memory, starting at location
300000h.
Table 27-2 provides a complete list of the Configuration
bits and Device IDs. A detailed explanation of the vari-
ous bit functions is provided in Register 27-1 through
Register 27-6.
27.1.1 CONSIDERATIONS FOR
CONFIGURING THE PIC18F47J13
FAMILY DEVICES
Unlike some previous PIC18 microcontrollers,
PIC18F47J13 family devices do not use persistent
memory registers to store configuration information.
The Configuration registers, CONFIG1L through
CONFIG4H, are implemented as volatile memory.
Immediately after power-up, or after a device Reset,
the microcontroller hardware automatically loads the
CONFIG1L through CONFIG4L registers with configu-
ration data stored in nonvolatile Flash program
memory. The last four words of Flash program memory,
known as the Flash Configuration Words (FCW), are
used to store the configuration data.
Table 27-1 provides the Flash program memory, which
will be loaded into the corresponding Configuration
register.
When creating applications for these devices, users
should always specifically allocate the location of the
FCW for configuration data. This is to make certain that
program code is not stored in this address when the
code is compiled.
The four Most Significant bits (MSb) of the FCW, corre-
sponding to CONFIG1H, CONFIG2H, CONFIG3H and
CONFIG4H, should always be programmed to ‘1111’.
This makes these FCWs appear to be NOP instructions
in the remote event that their locations are ever
executed by accident.
The four MSbs of the CONFIG1H, CONFIG2H,
CONFIG3H and CONFIG4H registers are not
implemented, so writing ‘1’s to their corresponding
FCW has no effect on device operation.
To prevent inadvertent configuration changes during
code execution, the Configuration registers,
CONFIG1L through CONFIG4L, are loaded only once
per power-up or Reset cycle. User’s firmware can still
change the configuration by using self-reprogramming
to modify the contents of the FCW.
Modifying the FCW will not change the active contents
being used in the CONFIG1L through CONFIG4H
registers until after the device is reset.
PIC18F47J13 FAMILY
DS39974A-page 416 Preliminary 2010 Microchip Technology Inc.
TABLE 27-1: MAPPING OF THE FLASH CONFIGURATION WORDS TO THE CONFIGURATION
REGISTERS
TABLE 27-2: CONFIGURATION BITS AND DEVICE IDs
Configuration Re gis ter
(Volatile) Configuration Regist er
Address Flash Configuration Byte Address
CONFIG1L 300000h XXXF8h
CONFIG1H 300001h XXXF9h
CONFIG2L 300002h XXXFAh
CONFIG2H 300003h XXXFBh
CONFIG3L 300004h XXXFCh
CONFIG3H 300005h XXXFDh
CONFIG4L 300006h XXXFEh
CONFIG4H 300007h XXXFFh
File Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Default/
Unprog.
Value(1)
300000h CONFIG1L DEBUG XINST STVREN CFGPLLEN PLLDIV2 PLLDIV1 PLLDIV0 WDTEN 1111 1111
300001h CONFIG1H —(2) —(2) —(2) —(2) —CP0— — 1111 -1--
300002h CONFIG2L IESO FCMEN CLKOEC SOSCSEL1 SOSCSEL0 FOSC2 FOSC1 FOSC0 1111 1111
300003h CONFIG2H —(2) —(2) —(2) —(2) WDTPS3 WDTPS2 WDTPS1 WDTPS0 1111 1111
300004h CONFIG3L DSWDTPS3 DSWDTPS2 DSWDTPS1 DSWDTPS0 DSWDTEN DSBOREN RTCOSC DSWDTOSC 1111 1111
300005h CONFIG3H —(2) —(2) —(2) —(2) MSSPMSK PLLSEL ADCSEL IOL1WAY 1111 1111
300006h CONFIG4L WPCFG WPFP6 WPFP5 WPFP4 WPFP3 WPFP2 WPFP1 WPFP0 1111 1111
300007h CONFIG4H —(2) —(2) —(2) —(2) —— WPEND WPDIS 1111 --11
3FFFFEh DEVID1 DEV2 DEV1 DEV0 REV4 REV3 REV2 REV1 REV0 xx1x xxxx(3)
3FFFFFh DEVID2 DEV10 DEV9 DEV8 DEV7 DEV6 DEV5 DEV4 DEV3 0101 10x1(3)
Legend: x = unknown, u = unchanged, - = unimplemented. Shaded cells are unimplemented, read as ‘0’.
Note 1: Values reflect the unprogrammed state as received from the factory and following Power-on Resets. In all other Reset states, the
configuration bytes maintain their previously programmed states.
2: The value of these bits in program memory should always be programmed to ‘1’. This ensures that the location is executed as a NOP if it
is accidentally executed.
3: See Register 27-9 and Register 27-10 for DEVID values. These registers are read-only and cannot be programmed by the user.
2010 Microchip Technology Inc. Preliminary DS39974A-page 417
PIC18F47J13 FAMILY
REGISTER 27-1: CONFIG1L: CONFIGURATION REGISTER 1 LOW (BYTE ADDRESS 300000h)
R/WO-1 R/WO-1 R/WO-1 R/WO-1 R/WO-1 R/WO-1 R/WO-1 R/WO-1
DEBUG XINST STVREN CFGPLLEN PLLDIV2 PLLDIV1 PLLDIV0 WDTEN
bit 7 bit 0
Legend:
R = Readable bit WO = Write-Once bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 DEBUG: Background Debugger Enable bit
1 = Background debugger is disabled; RB6 and RB7 are configured as general purpose I/O pins
0 = Background debugger is enabled; RB6 and RB7 are dedicated to In-Circuit Debug
bit 6 XINST: Extended Instruction Set Enable bit
1 = Instruction set extension and Indexed Addressing mode are enabled
0 = Instruction set extension and Indexed Addressing mode are disabled
bit 5 STVREN: Stack Overflow/Underflow Reset Enable bit
1 = Reset on stack overflow/underflow is enabled
0 = Reset on stack overflow/underflow is disabled
bit 4 CFGPLLEN: PLL Enable bit
1 = PLL is disabled until firmware sets the PLLEN bit at run time (OSCTUNE<6>)
0 = PLL is enabled at start-up
bit 3-1 PLLDIV<2:0>: Oscillator Selection bits
Divider must be configured to provide a 4 MHz input into the 96 MHz PLL. These bits have no effect
on 4x PLL operation.
111 = No divide – oscillator is used directly (4 MHz input)
110 = Oscillator divided by 2 (8 MHz input)
101 = Oscillator divided by 3 (12 MHz input)
100 = Oscillator divided by 4 (16 MHz input)
011 = Oscillator divided by 5 (20 MHz input)
010 = Oscillator divided by 6 (24 MHz input)
001 = Oscillator divided by 10 (40 MHz input)
000 = Oscillator divided by 12 (48 MHz input)
bit 0 WDTEN: Watchdog Timer Enable bit
1 = WDT is enabled
0 = WDT is disabled (control is placed on the SWDTEN bit)
PIC18F47J13 FAMILY
DS39974A-page 418 Preliminary 2010 Microchip Technology Inc.
REGISTER 27-2: CONFIG1H: CONFIGURATION REGISTER 1 HIGH (BYTE ADDRESS 300001h)
U-1 U-1 U-1 U-1 U-0 R/WO-1 U-1 U-1
— — — — —CP0 — —
bit 7 bit 0
Legend:
R = Readable bit WO = Write-Once bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-4 Unimplemented: Program the corresponding Flash Configuration bit to ‘1’
bit 3 Unimplemented: Maintain as ‘0’
bit 2 CP0: Code Protection bit
1 = Program memory is not code-protected
0 = Program memory is code-protected
bit 1-0 Unimplemented: Maintain as ‘1’
REGISTER 27-3: CONFIG2L: CONFIGURATION REGISTER 2 LOW (BYTE ADDRESS 300002h)
R/WO-1 R/WO-1 R/WO-1 R/WO-1 R/WO-1 R/WO-1 R/WO-1 R/WO-1
IESO FCMEN CLKOEC SOSCSEL1 SOSCSEL0 FOSC2 FOSC1 FOSC0
bit 7 bit 0
Legend:
R = Readable bit WO = Write-Once bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 IESO: Two-Speed Start-up (Internal/External Oscillator Switchover) Control bit
1 = Two-Speed Start-up is enabled
0 = Two-Speed Start-up is disabled
bit 6 FCMEN: Fail-Safe Clock Monitor Enable bit
1 = Fail-Safe Clock Monitor is enabled
0 = Fail-Safe Clock Monitor is disabled
bit 5 CLKOEC: CLKO Enable Configuration bit
(Applicable only when the FOSC<2:1> bits are configured for EC or ECPLL mode.)
1 = CLKO output signal is active on the RA6 pin
0 = CLKO output is disabled
bit 4-3 SOSCSEL<1:0>: T1OSC/SOSC Power Selection Configuration bits
11 = High-power T1OSC/SOSC circuit is selected
10 = Digital (SCLKI) mode is enabled
01 = Low-power T1OSC/SOSC circuit is selected
00 = Reserved
bit 2-0 FOSC<2:0>: Oscillator Selection bits
111 = ECPLL oscillator with PLL software controlled; CLKO on RA6
110 = EC oscillator with CLKO on RA6
101 = HSPLL oscillator with PLL software controlled
100 = HS oscillator
011 = INTOSCPLLO, internal oscillator with PLL software controlled; CLKO on RA6; port function on RA7
010 = INTOSCPLL, internal oscillator with PLL software controlled; port function on RA6 and RA7
001 = INTOSCO internal oscillator block (INTRC/INTOSC) with CLKO on RA6; port function on RA7
000 = INTOSC internal oscillator block (INTRC/INTOSC); port function on RA6 and RA7
2010 Microchip Technology Inc. Preliminary DS39974A-page 419
PIC18F47J13 FAMILY
REGISTER 27-4: CONFIG2H: CONFIGURATION REGISTER 2 HIGH (BYTE ADDRESS 300003h)
U-1 U-1 U-1 U-1 R/WO-1 R/WO-1 R/WO-1 R/WO-1
— — — — WDTPS3 WDTPS2 WDTPS1 WDTPS0
bit 7 bit 0
Legend:
R = Readable bit WO = Write-Once bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-4 Unimplemented: Program the corresponding Flash Configuration bit to ‘1’
bit 3-0 WDTPS<3:0>: Watchdog Timer Postscale Select bits
1111 = 1:32,768
1110 = 1:16,384
1101 = 1:8,192
1100 = 1:4,096
1011 = 1:2,048
1010 = 1:1,024
1001 = 1:512
1000 = 1:256
0111 = 1:128
0110 = 1:64
0101 = 1:32
0100 = 1:16
0011 = 1:8
0010 = 1:4
0001 = 1:2
0000 = 1:1
PIC18F47J13 FAMILY
DS39974A-page 420 Preliminary 2010 Microchip Technology Inc.
REGISTER 27-5: CONFIG3L: CONFIGURATION REGISTER 3 LOW (BYTE ADDRESS 300004h)
R/WO-1 R/WO-1 R/WO-1 R/WO-1 R/WO-1 R/WO-1 R/WO-1 R/WO-1
DSWDTPS3(1) DSWDTPS2(1) DSWDTPS1(1) DSWDTPS0(1) DSWDTEN(1) DSBOREN RTCOSC DSWDTOSC(1)
bit 7 bit 0
Legend:
R = Readable bit WO = Write-Once bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-4 DSWDTPS<3:0>: Deep Sleep Watchdog Timer Postscale Select bits(1)
The DSWDT prescaler is 32. This creates an approximate base time unit of 1 ms.
1111 = 1:2,147,483,648 (25.7 days)
1110 = 1:536,870,912 (6.4 days)
1101 = 1:134,217,728 (38.5 hours)
1100 = 1:33,554,432 (9.6 hours)
1011 = 1:8,388,608 (2.4 hours)
1010 = 1:2,097,152 (36 minutes)
1001 = 1:524,288 (9 minutes)
1000 = 1:131,072 (135 seconds)
0111 = 1:32,768 (34 seconds)
0110 = 1:8,192 (8.5 seconds)
0101 = 1:2,048 (2.1 seconds)
0100 = 1:512 (528 ms)
0011 = 1:128 (132 ms)
0010 = 1:32 (33 ms)
0001 = 1:8 (8.3 ms)
0000 = 1:2 (2.1 ms)
bit 3 DSWDTEN: Deep Sleep Watchdog Timer Enable bit(1)
1 = DSWDT is enabled
0 = DSWDT is disabled
bit 2 DSBOREN: “F” Device Deep Sleep BOR Enable bit, “LF” Device VDD BOR Enable bit
For “F” Devices:
1 = VDD sensing BOR is enabled in Deep Sleep
0 = VDD sensing BOR circuit is always disabled
For “LF” Devices:
1 = VDD sensing BOR circuit is always enabled
0 = VDD sensing BOR circuit is always disabled
bit 1 RTCOSC: RTCC Reference Clock Select bit
1 = RTCC uses T1OSC/T1CKI as the reference clock
0 = RTCC uses INTRC as the reference clock
bit 0 DSWDTOSC: DSWDT Reference Clock Select bit(1)
1 = DSWDT uses INTRC as the reference clock
0 = DSWDT uses T1OSC/T1CKI as the reference clock
Note 1: Functions are not available on “LF” devices.
2010 Microchip Technology Inc. Preliminary DS39974A-page 421
PIC18F47J13 FAMILY
REGISTER 27-6: CONFIG3H: CONFIGURATION REGISTER 3 HIGH (BYTE ADDRESS 300005h)
U-1 U-1 U-1 U-1 R/WO-1 R/WO-1 R/WO-1 R/WO-1
— — — — MSSPMSK PLLSEL ADCSEL IOL1WAY
bit 7 bit 0
Legend:
R = Readable bit WO = Write-Once bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-4 Unimplemented: Program the corresponding Flash Configuration bit to ‘1’
bit 3 MSSPMSK: MSSP 7-Bit Address Masking Mode Enable bit
1 = 7-Bit Address Masking mode is enabled
0 = 5-Bit Address Masking mode is enabled
bit 2 PLLSEL: PLL Circuit Selection bit
1 = 4x PLL circuit is selected
0 = 96 MHz PLL circuit is selected
bit 1 ADCSEL: A/D Converter Mode bit
1 = 10-Bit Conversion mode is enabled
0 = 12-Bit Conversion mode is enabled
bit 0 IOL1WAY: IOLOCK One-Way Set Enable bit
1 = IOLOCK bit (PPSCON<0>) can be set once, provided the unlock sequence has been completed;
once set, the Peripheral Pin Select registers cannot be written to a second time
0 = IOLOCK bit (PPSCON<0>) can be set and cleared as needed, provided the unlock sequence has
been completed
REGISTER 27-7: CONFIG4L: CONFIGURATION REGISTER 4 LOW (BYTE ADDRESS 300006h)
R/WO-1 R/WO-1 R/WO-1 R/WO-1 R/WO-1 R/WO-1 R/WO-1 R/WO-1
WPCFG WPFP6 WPFP5 WPFP4 WPFP3 WPFP2 WPFP1 WPFP0
bit 7 bit 0
Legend:
R = Readable bit WO = Write-Once bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 WPCFG: Write/Erase Protect Configuration Region Select bit (valid when WPDIS = 0)
1 = Configuration Words page is not erase/write-protected unless WPEND and WPFP<5:0> settings
include the Configuration Words page(1)
0 = Configuration Words page is erase/write-protected, regardless of WPEND and WPFP<5:0>(1)
bit 6-0 WPFP<6:0>: Write/Erase Protect Page Start/End Location bits
Used with the WPEND bit to define which pages in Flash will be erase/write-protected.
Note 1: The “Configuration Words page” contains the FCWs and is the last page of implemented Flash memory on
a given device. Each page consists of 1,024 bytes. For example, on a device with 64 Kbytes of Flash, the
first page is 0 and the last page (Configuration Words page) is 63 (3Fh).
PIC18F47J13 FAMILY
DS39974A-page 422 Preliminary 2010 Microchip Technology Inc.
REGISTER 27-8: CONFIG4H: CONFIGURATION REGISTER 4 HIGH (BYTE ADDRESS 300007h)
U-1 U-1 U-1 U-1 U-0 U-0 R/WO-1 R/WO-1
— — — — — — WPEND WPDIS
bit 7 bit 0
Legend:
R = Readable bit WO = Write-Once bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-4 Unimplemented: Program the corresponding Flash Configuration bit to ‘1’
bit 3-2 Unimplemented: Read as ‘0’
bit 1 WPEND: Write-Protect Disable bit
1 = Flash pages, WPFP<6:0> to (Configuration Words page), are erase/write-protected
0 = Flash pages 0 to WPFP<6:0> are erase/write-protected
bit 0 WPDIS: Write-Protect Disable bit
1 = WPFP<5:0>, WPEND and WPCFG bits are ignored; all Flash memory may be erased or written
0 = WPFP<5:0>, WPEND and WPCFG bits are enabled; erase/write-protect is active for the selected
region(s)
REGISTER 27-9: DEVID1: DEVICE ID REGISTER 1 FOR PIC18F47J13 FAMILY DEVICES
(BYTE ADDRESS 3FFFFEh)
RRRRRRRR
DEV2 DEV1 DEV0 REV4 REV3 REV2 REV1 REV0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-5 DEV<2:0>: Device ID bits
These bits are used with DEV<10:3> bits in Device ID Register 2 to identify the part number. See
Register 27-10.
bit 4-0 REV<4:0>: Revision ID bits
These bits are used to indicate the device revision.
2010 Microchip Technology Inc. Preliminary DS39974A-page 423
PIC18F47J13 FAMILY
REGISTER 27-10: DEVID2: DEVICE ID REGISTER 2 FOR PIC18F47J13 FAMILY DEVICES
(BYTE ADDRESS 3FFFFFh)
RRRRRRRR
DEV10 DEV9 DEV8 DEV7 DEV6 DEV5 DEV4 DEV3
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-0 DEV<10:3>: Device ID bits
These bits are used with the DEV<2:0> bits in the Device ID Register 1 to identify the part number.
DEV<10:3>
(DEVID2<7:0>) DEV<2:0>
(DEVID1<7:5>) Device
0101 1001 111 PIC18F47J13
0101 1001 101 PIC18F46J13
0101 1001 011 PIC18F27J13
0101 1001 001 PIC18F26J13
0101 1011 111 PIC18LF47J13
0101 1011 101 PIC18LF46J13
0101 1011 011 PIC18LF27J13
0101 1011 001 PIC18LF26J13
PIC18F47J13 FAMILY
DS39974A-page 424 Preliminary 2010 Microchip Technology Inc.
27.2 Watchdog Timer (WDT)
PIC18F47J13 family devices have both a conventional
WDT circuit and a dedicated, Deep Sleep capable
Watchdog Timer. When enabled, the conventional
WDT operates in normal Run, Idle and Sleep modes.
This data sheet section describes the conventional
WDT circuit.
The dedicated, Deep Sleep capable WDT can only be
enabled in Deep Sleep mode. This timer is described in
Section 4.6.4 “Deep Sleep Watchdog Timer
(DSWDT)”.
The conventional WDT is driven by the INTRC
oscillator. When the WDT is enabled, the clock source
is also enabled. The nominal WDT period is 4 ms and
has the same stability as the INTRC oscillator.
The 4 ms period of the WDT is multiplied by a 16-bit
postscaler. Any output of the WDT postscaler is
selected by a multiplexer, controlled by the WDTPS bits
in Configuration Register 2H. Available periods range
from about 4 ms to 135 seconds (2.25 minutes
depending on voltage, temperature and WDT
postscaler). The WDT and postscaler are cleared
whenever a SLEEP or CLRWDT instruction is executed,
or a clock failure (primary or Timer1 oscillator) has
occurred.
27.2.1 CONTROL REGISTER
The WDTCON register (Register 27-11) is a readable
and writable register. The SWDTEN bit enables or dis-
ables WDT operation. This allows software to override
the WDTEN Configuration bit and enable the WDT only
if it has been disabled by the Configuration bit.
LVDSTAT is a read-only status bit that is continuously
updated and provides information about the current
level of VDDCORE. This bit is only valid when the on-chip
voltage regulator is enabled.
FIGU RE 27-1: WDT B LOC K DI AG R AM
Note 1: The CLRWDT and SLEEP instructions
clear the WDT and postscaler counts
when executed.
2: When a CLRWDT instruction is executed,
the postscaler count will be cleared.
INTRC Oscillator
WDT
Wake-up from
Reset
WDT
WDT Counter
Programmable Postscaler
1:1 to 1:32,768
Enable WDT
WDTPS<3:0>
SWDTEN
CLRWDT
4
Power-Managed
Reset
All Device Resets
SLEEP
INTRC Control
128
Modes
2010 Microchip Technology Inc. Preliminary DS39974A-page 425
PIC18F47J13 FAMILY
TABLE 27-3: SUMMARY OF WATCHDOG TIMER REGISTERS
REGISTER 27-11: WDTCON: WATCHDOG TIMER CONTROL REGISTER (ACCESS FC0h)
R/W-1 R-x R-x R/W-0 R-0 R/W-0 R/W-0 R/W-0
REGSLP LVDSTAT(2) ULPLVL VBGOE DS(2) ULPEN ULPSINK SWDTEN(1)
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 REGSLP: Voltage Regulator Low-Power Operation Enable bit
1 = On-chip regulator enters low-power operation when device enters Sleep mode
0 = On-chip regulator is active even in Sleep mode
bit 6 LVDSTAT : Low-Voltage Detect Status bit(2)
1 = VDDCORE > 2.45V nominal
0 = VDDCORE < 2.45V nominal
bit 5 ULPLVL: Ultra Low-Power Wake-up Output bit (not valid unless ULPEN = 1)
1 = Voltage on RA0 > ~0.5V
0 = Voltage on RA0 < ~0.5V
bit 4 VBGOE: Band Gap Reference Voltage (VBG) Output Enable bit
1 = Band gap reference output is enabled on the RA1 pin
0 = Band gap reference output is disabled
bit 3 DS: Deep Sleep Wake-up Status bit (used in conjunction with RCON, POR and BOR bits to determine
Reset source)(2)
1 = If the last exit from Reset was caused by a normal wake-up from Deep Sleep
0 = If the last exit from Reset was not due to a wake-up from Deep Sleep
bit 2 ULPEN: Ultra Low-Power Wake-up Module Enable bit
1 = Ultra low-power wake-up module is enabled; ULPLVL bit indicates the comparator output
0 = Ultra low-power wake-up module is disabled
bit 1 ULPSINK: Ultra Low-Power Wake-up Current Sink Enable bit
1 = Ultra low-power wake-up current sink is enabled (if ULPEN = 1)
0 = Ultra low-power wake-up current sink is disabled
bit 0 SWDTEN: Software Controlled Watchdog Timer Enable bit(1)
1 = Watchdog Timer is on
0 = Watchdog Timer is off
Note 1: This bit has no effect if the Configuration bit, WDTEN, is enabled.
2: Not available on devices where the on-chip voltage regulator is disabled (“LF” devices).
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
RCON IPEN —CM RI TO PD POR BOR
WDTCON REGSLP LVDSTAT ULPLVL VBGOE DS ULPEN ULPSINK SWDTEN
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used by the Watchdog Timer.
PIC18F47J13 FAMILY
DS39974A-page 426 Preliminary 2010 Microchip Technology Inc.
27.3 On-Chip Volt age Regulator
The digital core logic of the PIC18F47J13 family
devices is designed on an advanced manufacturing
process, which requires 2.0V to 2.7V. The digital core
logic obtains power from the VDDCORE/VCAP power
supply pin.
However, in many applications it may be inconvenient
to run the I/O pins at the same core logic voltage, as it
would restrict the ability of the device to interface with
other higher voltage devices, such as those run at a
nominal 3.3V. Therefore, all PIC18F47J13 family
devices implement a dual power supply rail topology.
The core logic obtains power from the VDDCORE/VCAP
pin, while the general purpose I/O pins obtain power
from the VDD pin of the microcontroller, which may be
supplied with a voltage between 2.15V to 3.6V (“F”
device) or 2.0V to 3.6V (“LF” device).
This dual supply topology allows the microcontroller to
interface with standard 3.3V logic devices, while running
the core logic at a lower voltage of nominally 2.5V.
In order to make the microcontroller more convenient to
use, an integrated 2.5V low dropout, low quiescent
current linear regulator has been integrated on the die
inside PIC18F47J13 family devices. This regulator is
designed specifically to supply the core logic of the
device. It allows PIC18F47J13 family devices to
effectively run from a single power supply rail, without
the need for external regulators.
The on-chip voltage regulator is always enabled on “F”
devices. The VDDCORE/VCAP pin simultaneously serves
as the regulator output pin and the core logic supply
power input pin. A capacitor should be connected to the
VDDCORE/VCAP pin to ground and is necessary for regu-
lator stability. For example connections for PIC18F and
PIC18LF devices, see Figure 27-2.
On “LF” devices, the on-chip regulator is always
disabled. This allows the device to save a small amount
of quiescent current consumption, which may be
advantageous in some types of applications, such as
those which will entirely be running at a nominal 2.5V.
On “LF” devices, the VDDCORE/VCAP pin still serves as
the core logic power supply input pin, and therefore,
must be connected to a 2.0V to 2.7V supply rail at the
application circuit board level. On these devices, the
I/O pins may still optionally be supplied with a voltage
between 2.0V to 3.6V, provided that VDD is always
greater than, or equal to, VDDCORE/VCAP. For example
connections for PIC18F and PIC18LF devices, see
Figure 27-2.
The specifications for core voltage and capacitance
are listed in Section 30.3 “DC Characteristics:
PIC18F47J13 Family (Industrial)”.
27.3.1 VOLTAGE REGULATOR TRACKING
MODE AND LOW-VOLTAGE
DETECTION
On “F” devices, the on-chip regulator provides a con-
stant voltage of 2.5V nominal to the digital core logic.
The regulator can provide this level from a VDD of about
2.5V, all the way up to the device’s VDDMAX. It does not
have the capability to boost VDD levels below 2.5V.
When the VDD supply input voltage drops too low to
regulate 2.5V, the regulator enters Tracking mode. In
Tracking mode, the regulator output follows VDD, with a
typical voltage drop of 100 mV or less.
The on-chip regulator includes a simple Low-Voltage
Detect (LVD) circuit. This circuit is separate and
independent of the High/Low-Voltage Detect (HLVD)
module described in Se ction 25.0 “High/Lo w Voltag e
Detect (HL VD)”. The on-chip regulator LVD circuit con-
tinuously monitors the VDDCORE voltage level and
updates the LVDSTAT bit in the WDTCON register. The
LVD detect threshold is set slightly below the normal
regulation set point of the on-chip regulator.
Application firmware may optionally poll the LVDSTAT
bit to determine when it is safe to run at the maximum
rated frequency, so as not to inadvertently violate the
voltage versus frequency requirements provided by
Figure 30-1.
The VDDCORE monitoring LVD circuit is only active
when the on-chip regulator is enabled. On “LF”
devices, the Analog-to-Digital Converter and the HLVD
module can still be used to provide firmware with VDD
and VDDCORE voltage level information.
Note 1: The on-chip voltage regulator is only
available in parts designated with an “F”,
such as PIC18F26J13. The on-chip
regulator is disabled on devices with “LF”
in their part number.
2: The VDDCORE/VCAP pin must never be left
floating. On “F” devices, it must be con-
nected to a capacitor of size, CEFC, to
ground. On “LF” devices, VDDCORE/VCAP
must be connected to a power supply
source between 2.0V and 2.7V. Note: In parts designated with an “LF”, such as
PIC18LF47J13, VDDCORE must never
exceed VDD.
2010 Microchip Technology Inc. Preliminary DS39974A-page 427
PIC18F47J13 FAMILY
FIGURE 27-2: CONNECTIONS FOR THE
ON-CHIP REGULATOR 27.3.2 ON-CHIP REGULATOR AND BOR
When the on-chip regulator is enabled, PIC18F47J13
family devices also have a simple brown-out capability.
If the voltage supplied to the regulator is inadequate to
maintain a minimum output level, the regulator Reset
circuitry will generate a Brown-out Reset (BOR). This
event is captured by the BOR flag bit (RCON<0>).
The operation of the BOR is described in more detail in
Section 5.4 “Brown-out Reset (BOR)” and
Section 5.4.1 “Detecting BOR”. The brown-out voltage
levels are specific in Section 30.1 “DC Characteristics:
Supply Voltage PIC18F 47 J1 3 F am ily (I ndu str i al)” .
27.3.3 POWER-UP REQUIREMENTS
The on-chip regulator is designed to meet the power-up
requirements for the device. If the application does not
use the regulator, then strict power-up conditions must
be adhered to. While powering up, VDDCORE should not
exceed VDD by 0.3 volts.
27.3.4 OPERATION IN SLEEP MODE
When enabled, the on-chip regulator always consumes
a small incremental amount of current over IDD. This
includes when the device is in Sleep mode, even
though the core digital logic does not require much
power. To provide additional savings in applications
where power resources are critical, the regulator can
be configured to automatically enter a lower quiescent
draw Standby mode whenever the device goes into
Sleep mode. This feature is controlled by the REGSLP
bit (WDTCON<7>, Register 27-11). If this bit is set
upon entry into Sleep mode, the regulator will transition
into a lower power state. In this state, the regulator still
provides a regulated output voltage necessary to
maintain SRAM state information, but consumes less
quiescent current.
Substantial Sleep mode power savings can be
obtained by setting the REGSLP bit, but device
wake-up time will increase in order to insure the
regulator has enough time to stabilize.
VDD
VDDCORE/VCAP
VSS
3.3V
2.5V
VDD
VDDCORE/VCAP
VSS
CF
3.3V
OR
VDD
VDDCORE/VCAP
VSS
2.5V
PIC18FXXJ13 Devices (Regu lator Enabled ):
PIC18LFXXJ13 Devices (Regulator Disabled):
PIC18FXXJ13
PIC18LFXXJ13
PIC18LFXXJ13
PIC18F47J13 FAMILY
DS39974A-page 428 Preliminary 2010 Microchip Technology Inc.
27.4 Two-Speed Start-up
The Two-Speed Start-up feature helps to minimize the
latency period, from oscillator start-up to code execu-
tion, by allowing the microcontroller to use the INTRC
oscillator as a clock source until the primary clock
source is available. It is enabled by setting the IESO
Configuration bit.
Two-Speed Start-up should be enabled only if the
primary oscillator mode is HS or HSPLL
(Crystal-Based) modes. Since the EC and ECPLL
modes do not require an Oscillator Start-up Timer
(OST) delay, Two-Speed Start-up should be disabled.
When enabled, Resets and wake-ups from Sleep mode
cause the device to configure itself to run from the inter-
nal oscillator block as the clock source, following the
time-out of the Power-up Timer after a Power-on Reset
is enabled. This allows almost immediate code
execution while the primary oscillator starts and the
OST is running. Once the OST times out, the device
automatically switches to PRI_RUN mode.
In all other power-managed modes, Two-Speed
Start-up is not used. The device will be clocked by the
currently selected clock source until the primary clock
source becomes available. The setting of the IESO bit
is ignored.
FIGURE 27-3: TIMING TRANSITION FOR TWO-SPEED ST ART-UP (INTRC TO HSPLL)
27.4.1 SPECIAL CONSIDERATIONS FOR
USING TWO-SPEED START-UP
While using the INTRC oscillator in Two-Speed
Start-up, the device still obeys the normal command
sequences for entering power-managed modes,
including serial SLEEP instructions (refer to
Section 4.1.4 “Multiple Sleep Commands”). In
practice, this means that user code can change the
SCS<1:0> bit settings or issue SLEEP instructions
before the OST times out. This would allow an applica-
tion to briefly wake-up, perform routine “housekeeping”
tasks and return to Sleep before the device starts to
operate from the primary oscillator.
User code can also check if the primary clock source is
currently providing the device clocking by checking the
status of the OSTS bit (OSCCON<3>). If the bit is set,
the primary oscillator is providing the clock. Otherwise,
the internal oscillator block is providing the clock during
wake-up from Reset or Sleep mode.
27.5 Fail-Safe Clock Monitor
The Fail-Safe Clock Monitor (FSCM) allows the micro-
controller to continue operation in the event of an external
oscillator failure by automatically switching the device
clock to the internal oscillator block. The FSCM function
is enabled by setting the FCMEN Configuration bit.
When FSCM is enabled, the INTRC oscillator runs at
all times to monitor clocks to peripherals and provide a
backup clock in the event of a clock failure. Clock
monitoring (shown in Figure 27-4) is accomplished by
creating a sample clock signal, which is the INTRC out-
put divided by 64. This allows ample time between
FSCM sample clocks for a peripheral clock edge to
occur. The peripheral device clock and the sample
clock are presented as inputs to the clock monitor latch.
The clock monitor is set on the falling edge of the
device clock source but cleared on the rising edge of
the sample clock.
Q1 Q3 Q4
OSC1
Peripheral
Program PC PC + 2
INTRC
PLL Clock
Q1
PC + 6
Q2
Output
Q3 Q4 Q1
CPU Clock
PC + 4
Clock
Counter
Q2 Q2 Q3
Note 1: TOST = 1024 TOSC; TPLL = 2 ms (approx). These intervals are not shown to scale.
Wake from Interrupt Event
TPLL(1)
12 n-1n
Clock
OSTS bit Set
Transition
TOST(1)
2010 Microchip Technology Inc. Preliminary DS39974A-page 429
PIC18F47J13 FAMILY
FIGURE 27-4: FSCM BLOCK DIAGRAM
Clock failure is tested for on the falling edge of the
sample clock. If a sample clock falling edge occurs
while the clock monitor is still set, and a clock failure
has been detected (Figure 27-5), the following results:
• The FSCM generates an oscillator fail interrupt by
setting bit, OSCFIF (PIR2<7>);
• The device clock source is switched to the internal
oscillator block (OSCCON is not updated to show
the current clock source – this is the fail-safe
condition); and
•The WDT is reset.
During switchover, the postscaler frequency from the
internal oscillator block may not be sufficiently stable
for timing-sensitive applications. In these cases, it may
be desirable to select another clock configuration and
enter an alternate power-managed mode. This can be
done to attempt a partial recovery or execute a
controlled shutdown. See Section 4.1.4 “Multiple
Sleep Commands” and Section 27.4.1 “Special
Considerations For Using Two-speed Start-up” for
more details.
The FSCM will detect failures of the primary or secondary
clock sources only. If the internal oscillator block fails, no
failure would be detected, nor would any action be
possible.
27.5.1 FSCM AND THE WATCHDOG TIMER
Both the FSCM and the WDT are clocked by the
INTRC oscillator. Since the WDT operates with a
separate divider and counter, disabling the WDT has
no effect on the operation of the INTRC oscillator when
the FSCM is enabled.
As already noted, the clock source is switched to the
INTRC clock when a clock failure is detected; this may
mean a substantial change in the speed of code execu-
tion. If the WDT is enabled with a small prescale value,
a decrease in clock speed allows a WDT time-out to
occur and a subsequent device Reset. For this reason,
Fail-Safe Clock Monitor events also reset the WDT and
postscaler, allowing it to start timing from when execu-
tion speed was changed and decreasing the likelihood
of an erroneous time-out.
FIGU RE 27-5: FSC M TIMING DI AG R AM
Peripheral
INTRC ÷ 64
S
C
Q
(32 s) 488 Hz
(2.048 ms)
Clock Monitor
Latch
(edge-triggered)
Clock
Failure
Detected
Source
Clock
Q
OSCFIF
Clock Monitor
Device
Clock
Output
Sample Clock
Failure
Detected
Oscillator
Failure
Note: The device clock is normally at a much higher frequency than the sample clock. The relative frequencies in
this example have been chosen for clarity.
Output (Q)
Clock Monitor Test Clock Monitor Test Clock Monitor Test
PIC18F47J13 FAMILY
DS39974A-page 430 Preliminary 2010 Microchip Technology Inc.
27.5.2 EXITING FAIL-SAFE OPERATION
The Fail-Safe Clock Monitor condition is terminated by
either a device Reset or by entering a power-managed
mode. On Reset, the controller starts the primary clock
source specified in Configuration Register 2H (with any
required start-up delays that are required for the oscil-
lator mode, such as the OST or PLL timer). The INTRC
oscillator provides the device clock until the primary
clock source becomes ready (similar to a Two-Speed
Start-up). The clock source is then switched to the
primary clock (indicated by the OSTS bit in the
OSCCON register becoming set). The FSCM then
resumes monitoring the peripheral clock.
The primary clock source may never become ready
during start-up. In this case, operation is clocked by the
INTRC oscillator. The OSCCON register will remain in
its Reset state until a power-managed mode is entered.
27.5.3 FSCM INTERRUPTS IN
POWER-MANAGED MODES
By entering a power-managed mode, the clock
multiplexer selects the clock source selected by the
OSCCON register. FSCM of the power-managed clock
source resumes in the power-managed mode.
If an oscillator failure occurs during power-managed
operation, the subsequent events depend on whether
or not the oscillator failure interrupt is enabled. If
enabled (OSCFIF = 1), code execution will be clocked
by the INTRC multiplexer. An automatic transition back
to the failed clock source will not occur.
If the interrupt is disabled, subsequent interrupts while
in Idle mode will cause the CPU to begin executing
instructions while being clocked by the INTRC source.
27.5.4 POR OR WAKE-UP FROM SLEEP
The FSCM is designed to detect oscillator failure at any
point after the device has exited Power-on Reset (POR)
or low-power Sleep mode. When the primary device
clock is either the EC or INTRC modes, monitoring can
begin immediately following these events.
For HS or HSPLL modes, the situation is somewhat
different. Since the oscillator may require a start-up
time considerably longer than the FSCM sample clock
time, a false clock failure may be detected. To prevent
this, the internal oscillator block is automatically config-
ured as the device clock and functions until the primary
clock is stable (the OST and PLL timers have timed
out). This is identical to Two-Speed Start-up mode.
Once the primary clock is stable, the INTRC returns to
its role as the FSCM source.
As noted in Section 27.4.1 “Special Considerations
For Using Two-speed Start-up”, it is also possible to
select another clock configuration and enter an alternate
power-managed mode while waiting for the primary
clock to become stable. When the new power-managed
mode is selected, the primary clock is disabled.
27.6 Program Verification and Code
Protection
For all devices in the PIC18F47J13 family of devices,
the on-chip program memory space is treated as a
single block. Code protection for this block is controlled
by one Configuration bit, CP0. This bit inhibits external
reads and writes to the program memory space. It has
no direct effect in normal execution mode.
27.6.1 CONFIGURATION REGISTER
PROTECTION
The Configuration registers are protected against
untoward changes or reads in two ways. The primary
protection is the write-once feature of the Configuration
bits, which prevents reconfiguration once the bit has
been programmed during a power cycle. To safeguard
against unpredictable events, Configuration bit
changes resulting from individual cell level disruptions
(such as ESD events) will cause a parity error and
trigger a device Reset. This is seen by the user as a
Configuration Mismatch (CM) Reset.
The data for the Configuration registers is derived from
the FCW in program memory. When the CP0 bit is set,
the source data for device configuration is also
protected as a consequence.
Note: The same logic that prevents false
oscillator failure interrupts on POR, or
wake-up from Sleep, will also prevent the
detection of the oscillator’s failure to start
at all following these events. This can be
avoided by monitoring the OSTS bit and
using a timing routine to determine if the
oscillator is taking too long to start. Even
so, no oscillator failure interrupt will be
flagged.
2010 Microchip Technology Inc. Preliminary DS39974A-page 431
PIC18F47J13 FAMILY
27.7 In-Circuit Serial Programming™
(ICSP™)
PIC18F47J13 family microcontrollers can be serially
programmed while in the end application circuit. This is
simply done with two lines for clock and data, and three
other lines for power, ground and the programming
voltage. This allows customers to manufacture boards
with unprogrammed devices and then program the
microcontroller just before shipping the product. This
also allows the most recent firmware or a custom
firmware to be programmed.
27.8 In-Circuit Debugger
When the DEBUG Configuration bit is programmed to
a ‘0’, the In-Circuit Debugger functionality is enabled.
This function allows simple debugging functions when
used with MPLAB® IDE. When the microcontroller has
this feature enabled, some resources are not available
for general use.
Table 27-4 lists the resources required by the
background debugger.
TABLE 27-4: DEBUGGER RESOURCES
I/O Pins: RB6, RB7
Stack: TOSx registers
reserved.
PIC18F47J13 FAMILY
DS39974A-page 432 Preliminary 2010 Microchip Technology Inc.
NOTES:
2010 Microchip Technology Inc. Preliminary DS39974A-page 433
PIC18F47J13 FAMILY
28.0 INSTRUCTION SET SUMMARY
The PIC18F47J13 family of devices incorporate the
standard set of 75 PIC18 core instructions, as well as
an extended set of 8 new instructions for the optimiza-
tion of code that is recursive or that utilizes a software
stack. The extended set is discussed later in this
section.
28.1 Standard Instruction Set
The standard PIC18 MCU instruction set adds many
enhancements to the previous PIC® MCU instruction
sets, while maintaining an easy migration from these
PIC MCU instruction sets. Most instructions are a
single program memory word (16 bits), but there are
four instructions that require two program memory
locations.
Each single-word instruction is a 16-bit word divided
into an opcode, which specifies the instruction type and
one or more operands, which further specify the
operation of the instruction.
The instruction set is highly orthogonal and is grouped
into four basic categories:
•Byte-oriented operations
•Bit-oriented operations
•Literal operations
•Control operations
The PIC18 instruction set summary in Table 28-2 lists
byte-oriented, bit-oriented, literal and control
operations. Table 28-1 shows the opcode field
descriptions.
Most byte-oriented instructions have three operands:
1. The file register (specified by ‘f’)
2. The destination of the result (specified by ‘d’)
3. The accessed memory (specified by ‘a’)
The file register designator, ‘f’, specifies which file
register is to be used by the instruction. The destination
designator, ‘d’, specifies where the result of the
operation is to be placed. If ‘d’ is zero, the result is
placed in the WREG register. If ‘d’ is one, the result is
placed in the file register specified in the instruction.
All bit-oriented instructions have three operands:
1. The file register (specified by ‘f’)
2. The bit in the file register (specified by ‘b’)
3. The accessed memory (specified by ‘a’)
The bit field designator, ‘b’, selects the number of the bit
affected by the operation, while the file register desig-
nator, ‘f’, represents the number of the file in which the
bit is located.
The literal instructions may use some of the following
operands:
• A literal value to be loaded into a file register
(specified by ‘k’)
• The desired FSR register to load the literal value
into (specified by ‘f’)
• No operand required
(specified by ‘—’)
The control instructions may use some of the following
operands:
• A program memory address (specified by ‘n’)
• The mode of the CALL or RETURN instructions
(specified by ‘s’)
• The mode of the table read and table write
instructions (specified by ‘m’)
• No operand required
(specified by ‘—’)
All instructions are a single word, except for four
double-word instructions. These instructions were
made double-word to contain the required information
in 32 bits. In the second word, the 4 MSbs are ‘1’s. If
this second word is executed as an instruction (by
itself), it will execute as a NOP.
All single-word instructions are executed in a single
instruction cycle, unless a conditional test is true or the
program counter is changed as a result of the instruc-
tion. In these cases, the execution takes two instruction
cycles with the additional instruction cycle(s) executed
as a NOP.
The double-word instructions execute in two instruction
cycles.
One instruction cycle consists of four oscillator periods.
Thus, for an oscillator frequency of 4 MHz, the normal
instruction execution time is 1 s. If a conditional test is
true, or the program counter is changed as a result of
an instruction, the instruction execution time is 2 s.
Two-word branch instructions (if true) would take 3 s.
Figure 28-1 shows the general formats that the instruc-
tions can have. All examples use the convention ‘nnh’
to represent a hexadecimal number.
The Instruction Set Summary, shown in Table 28-2,
lists the standard instructions recognized by the
Microchip MPASMTM Assembler.
Section 28.1.1 “Standard Instruction Set” provides
a description of each instruction.
PIC18F47J13 FAMILY
DS39974A-page 434 Preliminary 2010 Microchip Technology Inc.
TABLE 28-1: OPCODE FIELD DESCRIPTIONS
Field Description
aRAM Access bit:
a = 0: RAM location in Access RAM (BSR register is ignored)
a = 1: RAM bank is specified by BSR register
bbb Bit address within an 8-bit file register (0 to 7).
BSR Bank Select Register. Used to select the current RAM bank.
C, DC, Z, OV, N ALU Status bits: Carry, Digit Carry, Zero, Overflow, Negative.
dDestination Select bit:
d = 0: store result in WREG
d = 1: store result in file register f
dest Destination: either the WREG register or the specified register file location.
f8-bit Register file address (00h to FFh), or 2-bit FSR designator (0h to 3h).
fs12-bit Register file address (000h to FFFh). This is the source address.
fd12-bit Register file address (000h to FFFh). This is the destination address.
GIE Global Interrupt Enable bit.
kLiteral field, constant data or label (may be either an 8-bit, 12-bit or a 20-bit value).
label Label name.
mm The mode of the TBLPTR register for the table read and table write instructions.
Only used with table read and table write instructions:
*No change to register (such as TBLPTR with table reads and writes)
*+ Post-Increment register (such as TBLPTR with table reads and writes)
*- Post-Decrement register (such as TBLPTR with table reads and writes)
+* Pre-Increment register (such as TBLPTR with table reads and writes)
nThe relative address (2’s complement number) for relative branch instructions or the direct address for
Call/Branch and Return instructions.
PC Program Counter.
PCL Program Counter Low Byte.
PCH Program Counter High Byte.
PCLATH Program Counter High Byte Latch.
PCLATU Program Counter Upper Byte Latch.
PD Power-Down bit.
PRODH Product of Multiply High Byte.
PRODL Product of Multiply Low Byte.
sFast Call/Return Mode Select bit:
s = 0: do not update into/from shadow registers
s = 1: certain registers loaded into/from shadow registers (Fast mode)
TBLPTR 21-bit Table Pointer (points to a program memory location).
TABLAT 8-bit Table Latch.
TO Time-out bit.
TOS Top-of-Stack.
uUnused or Unchanged.
WDT Watchdog Timer.
WREG Working register (accumulator).
xDon’t care (‘0’ or ‘1’). The assembler will generate code with x = 0. It is the recommended form of use for
compatibility with all Microchip software tools.
zs7-bit offset value for Indirect Addressing of register files (source).
zd7-bit offset value for Indirect Addressing of register files (destination).
{ } Optional argument.
[text] Indicates an Indexed Address.
(text) The contents of text.
[expr]<n> Specifies bit n of the register indicated by the pointer expr.
Assigned to.
< > Register bit field.
In the set of.
italics User-defined term (font is Courier New).
2010 Microchip Technology Inc. Preliminary DS39974A-page 435
PIC18F47J13 FAMILY
FIGU RE 28-1: GENER AL FOR MA T FOR IN STRU CTION S
Byte-oriented file register operations
15 10 9 8 7 0
d = 0 for result destination to be WREG register
OPCODE d a f (FILE #)
d = 1 for result destination to be file register (f)
a = 0 to force Access Bank
Bit-oriented file register operations
15 12 11 9 8 7 0
OPCODE b (BIT #) a f (FILE #)
b = 3-bit position of bit in file register (f)
Literal operations
15 8 7 0
OPCODE k (literal)
k = 8-bit immediate value
Byte to Byte move operations (2-word)
15 12 11 0
OPCODE f (Source FILE #)
CALL, GOTO and Branch operations
15 8 7 0
OPCODE n<7:0> (literal)
n = 20-bit immediate value
a = 1 for BSR to select bank
f = 8-bit file register address
a = 0 to force Access Bank
a = 1 for BSR to select bank
f = 8-bit file register address
15 12 11 0
1111 n<19:8> (literal)
15 12 11 0
1111 f (Destination FILE #)
f = 12-bit file register address
Control operations
Example Instruction
ADDWF MYREG, W, B
MOVFF MYREG1, MYREG2
BSF MYREG, bit, B
MOVLW 7Fh
GOTO Label
15 8 7 0
OPCODE S n<7:0> (literal)
15 12 11 0
1111 n<19:8> (literal)
CALL MYFUNC
15 11 10 0
OPCODE n<10:0> (literal)
S = Fast bit
BRA MYFUNC
15 8 7 0
OPCODE n<7:0> (literal) BC MYFUNC
PIC18F47J13 FAMILY
DS39974A-page 436 Preliminary 2010 Microchip Technology Inc.
TABLE 28-2: PIC18F47J13 FAMILY INSTRUCTION SET
Mnemonic,
Operands Description Cycles 16-Bit Instruction Word Status
Affected Notes
MSb LSb
BYTE-ORIENTED OPERATIONS
ADDWF
ADDWFC
ANDWF
CLRF
COMF
CPFSEQ
CPFSGT
CPFSLT
DECF
DECFSZ
DCFSNZ
INCF
INCFSZ
INFSNZ
IORWF
MOVF
MOVFF
MOVWF
MULWF
NEGF
RLCF
RLNCF
RRCF
RRNCF
SETF
SUBFWB
SUBWF
SUBWFB
SWAPF
TSTFSZ
XORWF
f, d, a
f, d, a
f, d, a
f, a
f, d, a
f, a
f, a
f, a
f, d, a
f, d, a
f, d, a
f, d, a
f, d, a
f, d, a
f, d, a
f, d, a
fs, fd
f, a
f, a
f, a
f, d, a
f, d, a
f, d, a
f, d, a
f, a
f, d, a
f, d, a
f, d, a
f, d, a
f, a
f, d, a
Add WREG and f
Add WREG and Carry bit to f
AND WREG with f
Clear f
Complement f
Compare f with WREG, Skip =
Compare f with WREG, Skip >
Compare f with WREG, Skip <
Decrement f
Decrement f, Skip if 0
Decrement f, Skip if Not 0
Increment f
Increment f, Skip if 0
Increment f, Skip if Not 0
Inclusive OR WREG with f
Move f
Move fs (source) to 1st word
fd (destination) 2nd word
Move WREG to f
Multiply WREG with f
Negate f
Rotate Left f through Carry
Rotate Left f (No Carry)
Rotate Right f through Carry
Rotate Right f (No Carry)
Set f
Subtract f from WREG with
Borrow
Subtract WREG from f
Subtract WREG from f with
Borrow
Swap Nibbles in f
Test f, Skip if 0
Exclusive OR WREG with f
1
1
1
1
1
1 (2 or 3)
1 (2 or 3)
1 (2 or 3)
1
1 (2 or 3)
1 (2 or 3)
1
1 (2 or 3)
1 (2 or 3)
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1 (2 or 3)
1
0010
0010
0001
0110
0001
0110
0110
0110
0000
0010
0100
0010
0011
0100
0001
0101
1100
1111
0110
0000
0110
0011
0100
0011
0100
0110
0101
0101
0101
0011
0110
0001
01da
00da
01da
101a
11da
001a
010a
000a
01da
11da
11da
10da
11da
10da
00da
00da
ffff
ffff
111a
001a
110a
01da
01da
00da
00da
100a
01da
11da
10da
10da
011a
10da
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
C, DC, Z, OV, N
C, DC, Z, OV, N
Z, N
Z
Z, N
None
None
None
C, DC, Z, OV, N
None
None
C, DC, Z, OV, N
None
None
Z, N
Z, N
None
None
None
C, DC, Z, OV, N
C, Z, N
Z, N
C, Z, N
Z, N
None
C, DC, Z, OV, N
C, DC, Z, OV, N
C, DC, Z, OV, N
None
None
Z, N
1, 2
1, 2
1,2
2
1, 2
4
4
1, 2
1, 2, 3, 4
1, 2, 3, 4
1, 2
1, 2, 3, 4
4
1, 2
1, 2
1
1, 2
1, 2
1, 2
1, 2
4
1, 2
Note 1: When a PORT register is modified as a function of itself (e.g., MOVF PORTB, 1, 0), the value used will be
that value present on the pins themselves. For example, if the data latch is ‘1’ for a pin configured as an input
and is driven low by an external device, the data will be written back with a ‘0’.
2: If this instruction is executed on the TMR0 register (and where applicable, d = 1), the prescaler will be cleared
if assigned.
3: If the Program Counter (PC) is modified or a conditional test is true, the instruction requires two cycles. The
second cycle is executed as a NOP.
4: Some instructions are two-word instructions. The second word of these instructions will be executed as a NOP
unless the first word of the instruction retrieves the information embedded in these 16 bits. This ensures that all
program memory locations have a valid instruction.
2010 Microchip Technology Inc. Preliminary DS39974A-page 437
PIC18F47J13 FAMILY
BIT -O RIENTED OPERATIONS
BCF
BSF
BTFSC
BTFSS
BTG
f, b, a
f, b, a
f, b, a
f, b, a
f, b, a
Bit Clear f
Bit Set f
Bit Test f, Skip if Clear
Bit Test f, Skip if Set
Bit Toggle f
1
1
1 (2 or 3)
1 (2 or 3)
1
1001
1000
1011
1010
0111
bbba
bbba
bbba
bbba
bbba
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
None
None
None
None
None
1, 2
1, 2
3, 4
3, 4
1, 2
CONTROL OPERATIONS
BC
BN
BNC
BNN
BNOV
BNZ
BOV
BRA
BZ
CALL
CLRWDT
DAW
GOTO
NOP
NOP
POP
PUSH
RCALL
RESET
RETFIE
RETLW
RETURN
SLEEP
n
n
n
n
n
n
n
n
n
n, s
—
—
n
—
—
—
—
n
s
k
s
—
Branch if Carry
Branch if Negative
Branch if Not Carry
Branch if Not Negative
Branch if Not Overflow
Branch if Not Zero
Branch if Overflow
Branch Unconditionally
Branch if Zero
Call Subroutine 1st word
2nd word
Clear Watchdog Timer
Decimal Adjust WREG
Go to Address 1st word
2nd word
No Operation
No Operation
Pop Top of Return Stack (TOS)
Push Top of Return Stack (TOS)
Relative Call
Software Device Reset
Return from Interrupt Enable
Return with Literal in WREG
Return from Subroutine
Go into Standby mode
1 (2)
1 (2)
1 (2)
1 (2)
1 (2)
1 (2)
1 (2)
2
1 (2)
2
1
1
2
1
1
1
1
2
1
2
2
2
1
1110
1110
1110
1110
1110
1110
1110
1101
1110
1110
1111
0000
0000
1110
1111
0000
1111
0000
0000
1101
0000
0000
0000
0000
0000
0010
0110
0011
0111
0101
0001
0100
0nnn
0000
110s
kkkk
0000
0000
1111
kkkk
0000
xxxx
0000
0000
1nnn
0000
0000
1100
0000
0000
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
kkkk
kkkk
0000
0000
kkkk
kkkk
0000
xxxx
0000
0000
nnnn
1111
0001
kkkk
0001
0000
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
kkkk
kkkk
0100
0111
kkkk
kkkk
0000
xxxx
0110
0101
nnnn
1111
000s
kkkk
001s
0011
None
None
None
None
None
None
None
None
None
None
TO, PD
C
None
None
None
None
None
None
All
GIE/GIEH,
PEIE/GIEL
None
None
TO, PD
4
TABLE 28-2: PIC18F47J13 FAMILY INSTRUCTION SET (CONTINUED)
Mnemonic,
Operands Description Cycles 16-Bit Instruction Word Status
Affected Notes
MSb LSb
Note 1: When a PORT register is modified as a function of itself (e.g., MOVF PORTB, 1, 0), the value used will be
that value present on the pins themselves. For example, if the data latch is ‘1’ for a pin configured as an input
and is driven low by an external device, the data will be written back with a ‘0’.
2: If this instruction is executed on the TMR0 register (and where applicable, d = 1), the prescaler will be cleared
if assigned.
3: If the Program Counter (PC) is modified or a conditional test is true, the instruction requires two cycles. The
second cycle is executed as a NOP.
4: Some instructions are two-word instructions. The second word of these instructions will be executed as a NOP
unless the first word of the instruction retrieves the information embedded in these 16 bits. This ensures that all
program memory locations have a valid instruction.
PIC18F47J13 FAMILY
DS39974A-page 438 Preliminary 2010 Microchip Technology Inc.
LITERAL OPERATIONS
ADDLW
ANDLW
IORLW
LFSR
MOVLB
MOVLW
MULLW
RETLW
SUBLW
XORLW
k
k
k
f, k
k
k
k
k
k
k
Add Literal and WREG
AND Literal with WREG
Inclusive OR Literal with WREG
Move literal (12-bit) 2nd word
to FSR(f) 1st word
Move Literal to BSR<3:0>
Move Literal to WREG
Multiply Literal with WREG
Return with Literal in WREG
Subtract WREG from Literal
Exclusive OR Literal with WREG
1
1
1
2
1
1
1
2
1
1
0000
0000
0000
1110
1111
0000
0000
0000
0000
0000
0000
1111
1011
1001
1110
0000
0001
1110
1101
1100
1000
1010
kkkk
kkkk
kkkk
00ff
kkkk
0000
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
C, DC, Z, OV, N
Z, N
Z, N
None
None
None
None
None
C, DC, Z, OV, N
Z, N
DATA MEMORY PROGRAM MEMORY OPERATIONS
TBLRD*
TBLRD*+
TBLRD*-
TBLRD+*
TBLWT*
TBLWT*+
TBLWT*-
TBLWT+*
Table Read
Table Read with Post-Increment
Table Read with Post-Decrement
Table Read with Pre-Increment
Table W r i te
Table Write with Post-Increment
Table Write with Post-Decrement
Table Write with Pre-Increment
2
2
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
1000
1001
1010
1011
1100
1101
1110
1111
None
None
None
None
None
None
None
None
TABLE 28-2: PIC18F47J13 FAMILY INSTRUCTION SET (CONTINUED)
Mnemonic,
Operands Description Cycles 16-Bit Instruction Word Status
Affected Notes
MSb LSb
Note 1: When a PORT register is modified as a function of itself (e.g., MOVF PORTB, 1, 0), the value used will be
that value present on the pins themselves. For example, if the data latch is ‘1’ for a pin configured as an input
and is driven low by an external device, the data will be written back with a ‘0’.
2: If this instruction is executed on the TMR0 register (and where applicable, d = 1), the prescaler will be cleared
if assigned.
3: If the Program Counter (PC) is modified or a conditional test is true, the instruction requires two cycles. The
second cycle is executed as a NOP.
4: Some instructions are two-word instructions. The second word of these instructions will be executed as a NOP
unless the first word of the instruction retrieves the information embedded in these 16 bits. This ensures that all
program memory locations have a valid instruction.
2010 Microchip Technology Inc. Preliminary DS39974A-page 439
PIC18F47J13 FAMILY
28.1.1 STANDARD INSTRUCTION SET
ADDLW ADD Literal to W
Syntax: ADDLW k
Operands: 0 k 255
Operation: (W) + k W
Status Affected: N, OV, C, DC, Z
Encoding: 0000 1111 kkkk kkkk
Description: The contents of W are added to the
8-bit literal ‘k’ and the result is placed in
W.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
literal ‘k’
Process
Data
Write to
W
Example: ADDLW 15h
Before Instruction
W = 10h
After Instruction
W = 25h
ADDWF ADD W to f
Syntax: ADDWF f {,d {,a}}
Operands: 0 f 255
d [0,1]
a [0,1]
Operation: (W) + (f) dest
Status Affected: N, OV, C, DC, Z
Encoding: 0010 01da ffff ffff
Description: Add W to register ‘f’. If ‘d’ is ‘0’, the
result is stored in W. If ‘d’ is ‘1’, the
result is stored back in register ‘f’
(default).
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Index e d
Literal Offset Mode” for details.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write to
destination
Example: ADDWF REG, 0, 0
Before Instruction
W = 17h
REG = 0C2h
After Instruction
W = 0D9h
REG = 0C2h
Note: All PIC18 instructions may take an optional label argument preceding the instruction mnemonic for use in
symbolic addressing. If a label is used, the instruction format then becomes: {label} instruction argument(s).
PIC18F47J13 FAMILY
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ADDWFC ADD W and Carry bit to f
Syntax: ADDWFC f {,d {,a}}
Operands: 0 f 255
d [0,1]
a [0,1]
Operation: (W) + (f) + (C) dest
Status Affected: N,OV, C, DC, Z
Encoding: 0010 00da ffff ffff
Description: Add W, the Carry flag and data memory
location ‘f’. If ‘d’ is ‘0’, the result is
placed in W. If ‘d’ is ‘1’, the result is
placed in data memory location ‘f’.
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Indexed
Literal Offset Mode” for details.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write to
destination
Example: ADDWFC REG, 0, 1
Before Instruction
Carry bit = 1
REG = 02h
W=4Dh
After Instruction
Carry bit = 0
REG = 02h
W = 50h
ANDLW AND Literal with W
Syntax: ANDLW k
Operands: 0 k 255
Operation: (W) .AND. k W
Status Affected: N, Z
Encoding: 0000 1011 kkkk kkkk
Description: The contents of W are ANDed with the
8-bit literal ‘k’. The result is placed in W.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read literal
‘k’
Process
Data
Write to
W
Example: ANDLW 05Fh
Before Instruction
W=A3h
After Instruction
W = 03h
2010 Microchip Technology Inc. Preliminary DS39974A-page 441
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ANDWF AND W with f
Syntax: ANDWF f {,d {,a}}
Operands: 0 f 255
d [0,1]
a [0,1]
Operation: (W) .AND. (f) dest
Status Affected: N, Z
Encoding: 0001 01da ffff ffff
Description: The contents of W are ANDed with
register ‘f’. If ‘d’ is ‘0’, the result is stored
in W. If ‘d’ is ‘1’, the result is stored back
in register ‘f’ (default).
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Indexed
Literal Offset Mode” for details.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write to
destination
Example: ANDWF REG, 0, 0
Before Instruction
W = 17h
REG = C2h
After Instruction
W = 02h
REG = C2h
BC Branch if Carry
Syntax: BC n
Operands: -128 n 127
Operation: if Carry bit is ‘1’,
(PC) + 2 + 2n PC
Status Affected: None
Encoding: 1110 0010 nnnn nnnn
Description: If the Carry bit is ’1’, then the program
will branch.
The 2’s complement number ‘2n’ is
added to the PC. Since the PC will have
incremented to fetch the next
instruction, the new address will be
PC + 2 + 2n. This instruction is then a
two-cycle instruction.
Words: 1
Cycles: 1(2)
Q Cycle Activity:
If Jump:
Q1 Q2 Q3 Q4
Decode Read literal
‘n’
Process
Data
Write to
PC
No
operation
No
operation
No
operation
No
operation
If No Jump:
Q1 Q2 Q3 Q4
Decode Read literal
‘n’
Process
Data
No
operation
Example: HERE BC 5
Before Instruction
PC = address (HERE)
After Instruction
If Carry = 1;
PC = address (HERE + 12)
If Carry = 0;
PC = address (HERE + 2)
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BCF Bit Clear f
Syntax: BCF f, b {,a}
Operands: 0 f 255
0 b 7
a [0,1]
Operation: 0 f<b>
Status Affected: None
Encoding: 1001 bbba ffff ffff
Description: Bit ‘b’ in register ‘f’ is cleared.
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Indexed
Literal Offset Mode” for details.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write
register ‘f’
Example: BCF FLAG_REG, 7, 0
Before Instruction
FLAG_REG = C7h
After Instruction
FLAG_REG = 47h
BN Branch if Negative
Syntax: BN n
Operands: -128 n 127
Operation: if Negative bit is ‘1’,
(PC) + 2 + 2n PC
Status Affected: None
Encoding: 1110 0110 nnnn nnnn
Description: If the Negative bit is ‘1’, then the
program will branch.
The 2’s complement number ‘2n’ is
added to the PC. Since the PC will have
incremented to fetch the next
instruction, the new address will be
PC + 2 + 2n. This instruction is then a
two-cycle instruction.
Words: 1
Cycles: 1(2)
Q Cycle Activity:
If Jump:
Q1 Q2 Q3 Q4
Decode Read literal
‘n’
Process
Data
Write to
PC
No
operation
No
operation
No
operation
No
operation
If No Jump:
Q1 Q2 Q3 Q4
Decode Read literal
‘n’
Process
Data
No
operation
Example: HERE BN Jump
Before Instruction
PC = address (HERE)
After Instruction
If Negative = 1;
PC = address (Jump)
If Negative = 0;
PC = address (HERE + 2)
2010 Microchip Technology Inc. Preliminary DS39974A-page 443
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BNC Branch if Not Carry
Syntax: BNC n
Operands: -128 n 127
Operation: if Carry bit is ‘0’,
(PC) + 2 + 2n PC
Status Affected: None
Encoding: 1110 0011 nnnn nnnn
Description: If the Carry bit is ‘0’, then the program
will branch.
The 2’s complement number ‘2n’ is
added to the PC. Since the PC will have
incremented to fetch the next
instruction, the new address will be
PC + 2 + 2n. This instruction is then a
two-cycle instruction.
Words: 1
Cycles: 1(2)
Q Cycle Activity:
If Jump:
Q1 Q2 Q3 Q4
Decode Read literal
‘n’
Process
Data
Write to
PC
No
operation
No
operation
No
operation
No
operation
If No Jump:
Q1 Q2 Q3 Q4
Decode Read literal
‘n’
Process
Data
No
operation
Example: HERE BNC Jump
Before Instruction
PC = address (HERE)
After Instruction
If Carry = 0;
PC = address (Jump)
If Carry = 1;
PC = address (HERE + 2)
BNN Branch if Not Negative
Syntax: BNN n
Operands: -128 n 127
Operation: if Negative bit is ‘0’,
(PC) + 2 + 2n PC
Status Affected: None
Encoding: 1110 0111 nnnn nnnn
Description: If the Negative bit is ‘0’, then the
program will branch.
The 2’s complement number ‘2n’ is
added to the PC. Since the PC will have
incremented to fetch the next
instruction, the new address will be
PC + 2 + 2n. This instruction is then a
two-cycle instruction.
Words: 1
Cycles: 1(2)
Q Cycle Activity:
If Jump:
Q1 Q2 Q3 Q4
Decode Read literal
‘n’
Process
Data
Write to
PC
No
operation
No
operation
No
operation
No
operation
If No Jump:
Q1 Q2 Q3 Q4
Decode Read literal
‘n’
Process
Data
No
operation
Example: HERE BNN Jump
Before Instruction
PC = address (HERE)
After Instruction
If Negative = 0;
PC = address (Jump)
If Negative = 1;
PC = address (HERE + 2)
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BNOV Branch if Not Overflow
Syntax: BNOV n
Operands: -128 n 127
Operation: if Overflow bit is ‘0’,
(PC) + 2 + 2n PC
Status Affected: None
Encoding: 1110 0101 nnnn nnnn
Description: If the Overflow bit is ‘0’, then the
program will branch.
The 2’s complement number ‘2n’ is
added to the PC. Since the PC will have
incremented to fetch the next
instruction, the new address will be
PC + 2 + 2n. This instruction is then a
two-cycle instruction.
Words: 1
Cycles: 1(2)
Q Cycle Activity:
If Jump:
Q1 Q2 Q3 Q4
Decode Read literal
‘n’
Process
Data
Write to
PC
No
operation
No
operation
No
operation
No
operation
If No Jump:
Q1 Q2 Q3 Q4
Decode Read literal
‘n’
Process
Data
No
operation
Example: HERE BNOV Jump
Before Instruction
PC = address (HERE)
After Instruction
If Overflow = 0;
PC = address (Jump)
If Overflow = 1;
PC = address (HERE + 2)
BNZ Branch if Not Zero
Syntax: BNZ n
Operands: -128 n 127
Operation: if Zero bit is ‘0’,
(PC) + 2 + 2n PC
Status Affected: None
Encoding: 1110 0001 nnnn nnnn
Description: If the Zero bit is ‘0’, then the program
will branch.
The 2’s complement number ‘2n’ is
added to the PC. Since the PC will have
incremented to fetch the next
instruction, the new address will be
PC + 2 + 2n. This instruction is then a
two-cycle instruction.
Words: 1
Cycles: 1(2)
Q Cycle Activity:
If Jump:
Q1 Q2 Q3 Q4
Decode Read literal
‘n’
Process
Data
Write to
PC
No
operation
No
operation
No
operation
No
operation
If No Jump:
Q1 Q2 Q3 Q4
Decode Read literal
‘n’
Process
Data
No
operation
Example: HERE BNZ Jump
Before Instruction
PC = address (HERE)
After Instruction
If Zero = 0;
PC = address (Jump)
If Zero = 1;
PC = address (HERE + 2)
2010 Microchip Technology Inc. Preliminary DS39974A-page 445
PIC18F47J13 FAMILY
BRA Uncondition a l B ranch
Syntax: BRA n
Operands: -1024 n 1023
Operation: (PC) + 2 + 2n PC
Status Affected: None
Encoding: 1101 0nnn nnnn nnnn
Description: Add the 2’s complement number ‘2n’ to
the PC. Since the PC will have
incremented to fetch the next
instruction, the new address will be
PC + 2 + 2n. This instruction is a
two-cycle instruction.
Words: 1
Cycles: 2
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read literal
‘n’
Process
Data
Write to
PC
No
operation
No
operation
No
operation
No
operation
Example: HERE BRA Jump
Before Instruction
PC = address (HERE)
After Instruction
PC = address (Jump)
BSF Bit Set f
Syntax: BSF f, b {,a}
Operands: 0 f 255
0 b 7
a [0,1]
Operation: 1 f<b>
Status Affected: None
Encoding: 1000 bbba ffff ffff
Description: Bit ‘b’ in register ‘f’ is set.
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Index e d
Literal Offset Mode” for details.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write
register ‘f’
Example: BSF FLAG_REG, 7, 1
Before Instruction
FLAG_REG = 0Ah
After Instruction
FLAG_REG = 8Ah
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DS39974A-page 446 Preliminary 2010 Microchip Technology Inc.
BTFSC B it Test Fi le , S k ip if C lear
Syntax: BTFSC f, b {,a}
Operands: 0 f 255
0 b 7
a [0,1]
Operation: skip if (f<b>) = 0
Status Affected: None
Encoding: 1011 bbba ffff ffff
Description: If bit ‘b’ in register ‘f’ is ‘0’, then the next
instruction is skipped. If bit ‘b’ is ‘0’, then
the next instruction fetched during the
current instruction execution is discarded
and a NOP is executed instead, making
this a two-cycle instruction.
If ‘a’ is ‘0’, the Access Bank is selected. If
‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction set
is enabled, this instruction operates in
Indexed Literal Offset Addressing mode
whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Indexed
Literal Offset Mode” for details.
Words: 1
Cycles: 1(2)
Note: 3 cycles if skip and followed
by a 2-word instruction.
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
No
operation
If skip:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
If skip and followed by 2-word instruction:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
Example: HERE
FALSE
TRUE
BTFSC
:
:
FLAG, 1, 0
Before Instruction
PC = address (HERE)
After Instruction
If FLAG<1> = 0;
PC = address (TRUE)
If FLAG<1> = 1;
PC = address (FALSE)
BTFSS Bit Te s t File, S k ip if Se t
Syntax: BTFSS f, b {,a}
Operands: 0 f 255
0 b < 7
a [0,1]
Operation: skip if (f<b>) = 1
Status Affected: None
Encoding: 1010 bbba ffff ffff
Description: If bit ‘b’ in register ‘f’ is ‘1’, then the next
instruction is skipped. If bit ‘b’ is ‘1’, then
the next instruction fetched during the
current instruction execution is discarded
and a NOP is executed instead, making
this a two-cycle instruction.
If ‘a’ is ‘0’, the Access Bank is selected. If
‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates in
Indexed Literal Offset Addressing mode
whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Index e d
Literal Offset Mode” for details.
Words: 1
Cycles: 1(2)
Note: 3 cycles if skip and followed
by a 2-word instruction.
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
No
operation
If skip:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
If skip and followed by 2-word instruction:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
Example: HERE
FALSE
TRUE
BTFSS
:
:
FLAG, 1, 0
Before Instruction
PC = address (HERE)
After Instruction
If FLAG<1> = 0;
PC = address (FALSE)
If FLAG<1> = 1;
PC = address (TRUE)
2010 Microchip Technology Inc. Preliminary DS39974A-page 447
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BTG Bit T oggle f
Syntax: BTG f, b {,a}
Operands: 0 f 255
0 b < 7
a [0,1]
Operation: (f<b>) f<b>
Status Affected: None
Encoding: 0111 bbba ffff ffff
Description: Bit ‘b’ in data memory location ‘f’ is
inverted.
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Indexed
Liter a l Offset Mod e ” for details.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write
register ‘f’
Example: BTG PORTC, 4, 0
Before Instruction:
PORTC = 0111 0101 [75h]
After Instruction:
PORTC = 0110 0101 [65h]
BOV Br a nch if O v er f l ow
Syntax: BOV n
Operands: -128 n 127
Operation: if Overflow bit is ‘1’,
(PC) + 2 + 2n PC
Status Affected: None
Encoding: 1110 0100 nnnn nnnn
Description: If the Overflow bit is ‘1’, then the
program will branch.
The 2’s complement number ‘2n’ is
added to the PC. Since the PC will have
incremented to fetch the next
instruction, the new address will be
PC + 2 + 2n. This instruction is then a
two-cycle instruction.
Words: 1
Cycles: 1(2)
Q Cycle Activity:
If Jump:
Q1 Q2 Q3 Q4
Decode Read literal
‘n’
Process
Data
Write to PC
No
operation
No
operation
No
operation
No
operation
If No Jump:
Q1 Q2 Q3 Q4
Decode Read literal
‘n’
Process
Data
No
operation
Example: HERE BOV Jump
Before Instruction
PC = address (HERE)
After Instruction
If Overflow = 1;
PC = address (Jump)
If Overflow = 0;
PC = address (HERE + 2)
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BZ Branch if Zero
Syntax: BZ n
Operands: -128 n 127
Operation: if Zero bit is ‘1’,
(PC) + 2 + 2n PC
Status Affected: None
Encoding: 1110 0000 nnnn nnnn
Description: If the Zero bit is ‘1’, then the program
will branch.
The 2’s complement number ‘2n’ is
added to the PC. Since the PC will have
incremented to fetch the next
instruction, the new address will be
PC + 2 + 2n. This instruction is then a
two-cycle instruction.
Words: 1
Cycles: 1(2)
Q Cycle Activity:
If Jump:
Q1 Q2 Q3 Q4
Decode Read literal
‘n’
Process
Data
Write to
PC
No
operation
No
operation
No
operation
No
operation
If No Jump:
Q1 Q2 Q3 Q4
Decode Read literal
‘n’
Process
Data
No
operation
Example: HERE BZ Jump
Before Instruction
PC = address (HERE)
After Instruction
If Zero = 1;
PC = address (Jump)
If Zero = 0;
PC = address (HERE + 2)
CALL Subroutine Call
Syntax: CALL k {,s}
Operands: 0 k 1048575
s [0,1]
Operation: (PC) + 4 TOS,
k PC<20:1>;
if s = 1
(W) WS,
(STATUS) STATUSS,
(BSR) BSRS
Status Affected: None
Encoding:
1st word (k<7:0>)
2nd word(k<19:8>)
1110
1111 110s
k19kkk k7kkk
kkkk kkkk0
kkkk8
Description: Subroutine call of entire 2-Mbyte
memory range. First, return address
(PC+ 4) is pushed onto the return stack.
If ‘s’ = 1, the W, STATUS and BSR
registers are also pushed into their
respective shadow registers, WS,
STATUSS and BSRS. If ‘s’ = 0, no
update occurs (default). Then, the
20-bit value ‘k’ is loaded into PC<20:1>.
CALL is a two-cycle instruction.
Words: 2
Cycles: 2
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read literal
‘k’<7:0>,
Push PC to
stack
Read literal
’k’<19:8>,
Write to PC
No
operation
No
operation
No
operation
No
operation
Example: HERE CALL THERE,1
Before Instruction
PC = address (HERE)
After Instruction
PC = address (THERE)
TOS = address (HERE + 4)
WS = W
BSRS = BSR
STATUSS = STATUS
2010 Microchip Technology Inc. Preliminary DS39974A-page 449
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CLRF Clear f
Syntax: CLRF f {,a}
Operands: 0 f 255
a [0,1]
Operation: 000h f,
1 Z
Status Affected: Z
Encoding: 0110 101a ffff ffff
Description: Clears the contents of the specified
register.
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Indexed
Literal Offset Mode” for details.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write
register ‘f’
Example: CLRF FLAG_REG,1
Before Instruction
FLAG_REG = 5Ah
After Instruction
FLAG_REG = 00h
CLRWDT Clear Watchdog Timer
Syntax: CLRWDT
Operands: None
Operation: 000h WDT,
000h WDT postscaler,
1 TO,
1 PD
Status Affected: TO, PD
Encoding: 0000 0000 0000 0100
Description: CLRWDT instruction resets the
Watchdog Timer. It also resets the post-
scaler of the WDT. Status bits, TO and
PD, are set.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode No
operation
Process
Data
No
operation
Example: CLRWDT
Before Instruction
WDT Counter = ?
After Instruction
WDT Counter = 00h
WDT Postscaler = 0
TO =1
PD =1
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COMF Complement f
Syntax: COMF f {,d {,a}}
Operands: 0 f 255
d [0,1]
a [0,1]
Operation: f dest
Status Affected: N, Z
Encoding: 0001 11da ffff ffff
Description: The contents of register ‘f’ are
complemented. If ‘d’ is ‘0’, the result is
stored in W. If ‘d’ is ‘1’, the result is
stored back in register ‘f’ (default).
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Indexed
Literal Offset Mode” for details.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write to
destination
Example: COMF REG, 0, 0
Before Instruction
REG = 13h
After Instruction
REG = 13h
W=ECh
CPFSEQ Compare f with W, Skip if f = W
Syntax: CPFSEQ f {,a}
Operands: 0 f 255
a [0,1]
Operation: (f) – (W),
skip if (f) = (W)
(unsigned comparison)
Status Affected: None
Encoding: 0110 001a ffff ffff
Description: Compares the contents of data memory
location ‘f’ to the contents of W by
performing an unsigned subtraction.
If ‘f’ = W, then the fetched instruction is
discarded and a NOP is executed
instead, making this a two-cycle
instruction.
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Index e d
Literal Offset Mode” for details.
Words: 1
Cycles: 1(2)
Note: 3 cycles if skip and followed
by a 2-word instruction.
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
No
operation
If skip:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
If skip and followed by 2-word instruction:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
Example: HERE CPFSEQ REG, 0
NEQUAL :
EQUAL :
Before Instruction
PC Address = HERE
W=?
REG = ?
After Instruction
If REG = W;
PC = Address (EQUAL)
If REG W;
PC = Address (NEQUAL)
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CPFSGT Compare f with W, Skip if f > W
Syntax: CPFSGT f {,a}
Operands: 0 f 255
a [0,1]
Operation: (f) –W),
skip if (f) > (W)
(unsigned comparison)
Status Affected: None
Encoding: 0110 010a ffff ffff
Description: Compares the contents of data memory
location ‘f’ to the contents of the W by
performing an unsigned subtraction.
If the contents of ‘f’ are greater than the
contents of WREG, then the fetched
instruction is discarded and a NOP is
executed instead, making this a
two-cycle instruction.
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Indexed
Literal Offset Mode” for details.
Words: 1
Cycles: 1(2)
Note: 3 cycles if skip and followed
by a 2-word instruction.
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
No
operation
If skip:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
If skip and followed by 2-word instruction:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
Example: HERE CPFSGT REG, 0
NGREATER :
GREATER :
Before Instruction
PC = Address (HERE)
W= ?
After Instruction
If REG W;
PC = Address (GREATER)
If REG W;
PC = Address (NGREATER)
CPFSLT Compare f with W, Skip if f < W
Syntax: CPFSLT f {,a}
Operands: 0 f 255
a [0,1]
Operation: (f) –W),
skip if (f) < (W)
(unsigned comparison)
Status Affected: None
Encoding: 0110 000a ffff ffff
Description: Compares the contents of data memory
location ‘f’ to the contents of W by
performing an unsigned subtraction.
If the contents of ‘f’ are less than the
contents of W, then the fetched
instruction is discarded and a NOP is
executed instead, making this a
two-cycle instruction.
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
Words: 1
Cycles: 1(2)
Note: 3 cycles if skip and followed
by a 2-word instruction.
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
No
operation
If skip:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
If skip and followed by 2-word instruction:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
Example: HERE CPFSLT REG, 1
NLESS :
LESS :
Before Instruction
PC = Address (HERE)
W= ?
After Instruction
If REG < W;
PC = Address (LESS)
If REG W;
PC = Address (NLESS)
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DAW Decimal Adjust W Register
Syntax: DAW
Operands: None
Operation: If [W<3:0> > 9] or [DC = 1], then
(W<3:0>) + 6 W<3:0>;
else
(W<3:0>) W<3:0>
If [W<7:4> > 9] or [C = 1], then
(W<7:4>) + 6 W<7:4>;
C =1;
else
(W<7:4>) W<7:4>
Status Affected: C
Encoding: 0000 0000 0000 0111
Description: DAW adjusts the eight-bit value in W,
resulting from the earlier addition of two
variables (each in packed BCD format)
and produces a correct packed BCD
result.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register W
Process
Data
Write
W
Example 1: DAW
Before Instruction
W=A5h
C=0
DC = 0
After Instruction
W = 05h
C=1
DC = 0
Example 2:
Before Instruction
W=CEh
C=0
DC = 0
After Instruction
W = 34h
C=1
DC = 0
DECF Decrement f
Syntax: DECF f {,d {,a}}
Operands: 0 f 255
d [0,1]
a [0,1]
Operation: (f) – 1 dest
Status Affected: C, DC, N, OV, Z
Encoding: 0000 01da ffff ffff
Description: Decrement register ‘f’. If ‘d’ is ‘0’, the
result is stored in W. If ‘d’ is ‘1’, the
result is stored back in register ‘f’
(default).
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Index e d
Literal Offset Mode” for details.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write to
destination
Example: DECF CNT, 1, 0
Before Instruction
CNT = 01h
Z=0
After Instruction
CNT = 00h
Z=1
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DECFSZ Decremen t f, Skip if 0
Syntax: DECFSZ f {,d {,a}}
Operands: 0 f 255
d [0,1]
a [0,1]
Operation: (f) – 1 dest,
skip if result = 0
Status Affected: None
Encoding: 0010 11da ffff ffff
Description: The contents of register ‘f’ are
decremented. If ‘d’ is ‘0’, the result is
placed in W. If ‘d’ is ‘1’, the result is
placed back in register ‘f’ (default).
If the result is ‘0’, the next instruction
which is already fetched is discarded
and a NOP is executed instead, making
it a two-cycle instruction.
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Indexed
Literal Offset Mode” for details.
Words: 1
Cycles: 1(2)
Note: 3 cycles if skip and followed
by a 2-word instruction.
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write to
destination
If skip:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
If skip and followed by 2-word instruction:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
Example: HERE DECFSZ CNT, 1, 1
GOTO LOOP
CONTINUE
Before Instruction
PC = Address (HERE)
After Instruction
CNT = CNT – 1
If CNT = 0;
PC = Address (CONTINUE)
If CNT 0;
PC = Address (HERE + 2)
DCFSNZ Decrement f, Skip if Not 0
Syntax: DCFSNZ f {,d {,a}}
Operands: 0 f 255
d [0,1]
a [0,1]
Operation: (f) – 1 dest,
skip if result 0
Status Affected: None
Encoding: 0100 11da ffff ffff
Description: The contents of register ‘f’ are
decremented. If ‘d’ is ‘0’, the result is
placed in W. If ‘d’ is ‘1’, the result is
placed back in register ‘f’ (default).
If the result is not ‘0’, the next
instruction which is already fetched is
discarded and a NOP is executed
instead, making it a two-cycle
instruction.
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Index e d
Literal Offset Mode” for details.
Words: 1
Cycles: 1(2)
Note: 3 cycles if skip and followed
by a 2-word instruction.
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write to
destination
If skip:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
If skip and followed by 2-word instruction:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
Example: HERE DCFSNZ TEMP, 1, 0
ZERO :
NZERO :
Before Instruction
TEMP = ?
After Instruction
TEMP = TEMP – 1,
If TEMP = 0;
PC = Address (ZERO)
If TEMP 0;
PC = Address (NZERO)
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GOTO Unconditional Branc h
Syntax: GOTO k
Operands: 0 k 1048575
Operation: k PC<20:1>
Status Affected: None
Encoding:
1st word (k<7:0>)
2nd word(k<19:8>)
1110
1111 1111
k19kkk k7kkk
kkkk kkkk0
kkkk8
Description: GOTO allows an unconditional branch
anywhere within entire 2-Mbyte memory
range. The 20-bit value ‘k’ is loaded into
PC<20:1>. GOTO is always a two-cycle
instruction.
Words: 2
Cycles: 2
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read literal
‘k’<7:0>,
No
operation
Read literal
‘k’<19:8>,
Write to PC
No
operation
No
operation
No
operation
No
operation
Example: GOTO THERE
After Instruction
PC = Address (THERE)
INCF Increment f
Syntax: INCF f {,d {,a}}
Operands: 0 f 255
d [0,1]
a [0,1]
Operation: (f) + 1 dest
Status Affected: C, DC, N, OV, Z
Encoding: 0010 10da ffff ffff
Description: The contents of register ‘f’ are
incremented. If ‘d’ is ‘0’, the result is
placed in W. If ‘d’ is ‘1’, the result is
placed back in register ‘f’ (default).
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Index e d
Literal Offset Mode” for details.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write to
destination
Example: INCF CNT, 1, 0
Before Instruction
CNT = FFh
Z=0
C=?
DC = ?
After Instruction
CNT = 00h
Z=1
C=1
DC = 1
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INCFSZ Increment f, Skip if 0
Syntax: INCFSZ f {,d {,a}}
Operands: 0 f 255
d [0,1]
a [0,1]
Operation: (f) + 1 dest,
skip if result = 0
Status Affected: None
Encoding: 0011 11da ffff ffff
Description: The contents of register ‘f’ are
incremented. If ‘d’ is ‘0’, the result is
placed in W. If ‘d’ is ‘1’, the result is
placed back in register ‘f’. (default)
If the result is ‘0’, the next instruction
which is already fetched is discarded
and a NOP is executed instead, making
it a two-cycle instruction.
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Indexed
Literal Offset Mode” for details.
Words: 1
Cycles: 1(2)
Note: 3 cycles if skip and followed
by a 2-word instruction.
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write to
destination
If skip:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
If skip and followed by 2-word instruction:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
Example: HERE INCFSZ CNT, 1, 0
NZERO :
ZERO :
Before Instruction
PC = Address (HERE)
After Instruction
CNT = CNT + 1
If CNT = 0;
PC = Address (ZERO)
If CNT 0;
PC = Address (NZERO)
INFSNZ Increment f, Skip if Not 0
Syntax: INFSNZ f {,d {,a}}
Operands: 0 f 255
d [0,1]
a [0,1]
Operation: (f) + 1 dest,
skip if result 0
Status Affected: None
Encoding: 0100 10da ffff ffff
Description: The contents of register ‘f’ are
incremented. If ‘d’ is ‘0’, the result is
placed in W. If ‘d’ is ‘1’, the result is
placed back in register ‘f’ (default).
If the result is not ‘0’, the next
instruction which is already fetched is
discarded and a NOP is executed
instead, making it a two-cycle
instruction.
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Index e d
Literal Offset Mode” for details.
Words: 1
Cycles: 1(2)
Note: 3 cycles if skip and followed
by a 2-word instruction.
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write to
destination
If skip:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
If skip and followed by 2-word instruction:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
Example: HERE INFSNZ REG, 1, 0
ZERO
NZERO
Before Instruction
PC = Address (HERE)
After Instruction
REG = REG + 1
If REG 0;
PC = Address (NZERO)
If REG = 0;
PC = Address (ZERO)
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IORLW Inclusive OR Litera l with W
Syntax: IORLW k
Operands: 0 k 255
Operation: (W) .OR. k W
Status Affected: N, Z
Encoding: 0000 1001 kkkk kkkk
Description: The contents of W are ORed with the
eight-bit literal ‘k’. The result is placed
in W.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
literal ‘k’
Process
Data
Write to
W
Example: IORLW 35h
Before Instruction
W=9Ah
After Instruction
W=BFh
IOR WF Inclusive OR W with f
Syntax: IORWF f {,d {,a}}
Operands: 0 f 255
d [0,1]
a [0,1]
Operation: (W) .OR. (f) dest
Status Affected: N, Z
Encoding: 0001 00da ffff ffff
Description: Inclusive OR W with register ‘f’. If ‘d’ is
‘0’, the result is placed in W. If ‘d’ is ‘1’,
the result is placed back in register ‘f’
(default).
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Index e d
Literal Offset Mode” for details.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write to
destination
Example: IORWF RESULT, 0, 1
Before Instruction
RESULT = 13h
W = 91h
After Instruction
RESULT = 13h
W = 93h
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LFS R Load FSR
Syntax: LFSR f, k
Operands: 0 f 2
0 k 4095
Operation: k FSRf
Status Affected: None
Encoding: 1110
1111 1110
0000 00ff
k7kkk k11kkk
kkkk
Description: The 12-bit literal ‘k’ is loaded into the
file select register pointed to by ‘f’.
Words: 2
Cycles: 2
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read literal
‘k’ MSB
Process
Data
Write
literal ‘k’
MSB to
FSRfH
Decode Read literal
‘k’ LSB
Process
Data
Write literal
‘k’ to FSRfL
Example: LFSR 2, 3ABh
After Instruction
FSR2H = 03h
FSR2L = ABh
MOVF Move f
Syntax: MOVF f {,d {,a}}
Operands: 0 f 255
d [0,1]
a [0,1]
Operation: f dest
Status Affected: N, Z
Encoding: 0101 00da ffff ffff
Description: The contents of register ‘f’ are moved to
a destination dependent upon the
status of ‘d’. If ‘d’ is ‘0’, the result is
placed in W. If ‘d’ is ‘1’, the result is
placed back in register ‘f’ (default).
Location ‘f’ can be anywhere in the
256-byte bank.
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Index e d
Literal Offset Mode” for details.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write
W
Example: MOVF REG, 0, 0
Before Instruction
REG = 22h
W=FFh
After Instruction
REG = 22h
W = 22h
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MOVFF Move f to f
Syntax: MOVFF fs,fd
Operands: 0 fs 4095
0 fd 4095
Operation: (fs) fd
Status Affected: None
Encoding:
1st word (source)
2nd word (destin.)
1100
1111 ffff
ffff ffff
ffff ffffs
ffffd
Description: The contents of source register ‘fs’ are
moved to destination register ‘fd’.
Location of source ‘fs’ can be anywhere
in the 4096-byte data space (000h to
FFFh) and location of destination ‘fd’
can also be anywhere from 000h to
FFFh.
Either source or destination can be W
(a useful special situation).
MOVFF is particularly useful for
transferring a data memory location to a
peripheral register (such as the transmit
buffer or an I/O port).
The MOVFF instruction cannot use the
PCL, TOSU, TOSH or TOSL as the
destination register
Words: 2
Cycles: 2
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
(src)
Process
Data
No
operation
Decode No
operation
No dummy
read
No
operation
Write
register ‘f’
(dest)
Example: MOVFF REG1, REG2
Before Instruction
REG1 = 33h
REG2 = 11h
After Instruction
REG1 = 33h
REG2 = 33h
MOVLB Move Liter a l to Low Nibble in BSR
Syntax: MOVLW k
Operands: 0 k 255
Operation: k BSR
Status Affected: None
Encoding: 0000 0001 kkkk kkkk
Description: The eight-bit literal ‘k’ is loaded into the
Bank Select Register (BSR). The value
of BSR<7:4> always remains ‘0’
regardless of the value of k7:k4.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
literal ‘k’
Process
Data
Write literal
‘k’ to BSR
Example: MOVLB 5
Before Instruction
BSR Register = 02h
After Instruction
BSR Register = 05h
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MOVLW M ov e Lite ral to W
Syntax: MOVLW k
Operands: 0 k 255
Operation: k W
Status Affected: None
Encoding: 0000 1110 kkkk kkkk
Description: The eight-bit literal ‘k’ is loaded into W.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
literal ‘k’
Process
Data
Write to
W
Example: MOVLW 5Ah
After Instruction
W=5Ah
MOVWF Move W to f
Syntax: MOVWF f {,a}
Operands: 0 f 255
a [0,1]
Operation: (W) f
Status Affected: None
Encoding: 0110 111a ffff ffff
Description: Move data from W to register ‘f’.
Location ‘f’ can be anywhere in the
256-byte bank.
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Index ed
Literal Offset Mod e” for details.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write
register ‘f’
Example: MOVWF REG, 0
Before Instruction
W=4Fh
REG = FFh
After Instruction
W=4Fh
REG = 4Fh
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MULLW M ultip ly Literal with W
Syntax: MULLW k
Operands: 0 k 255
Operation: (W) x k PRODH:PRODL
Status Affected: None
Encoding: 0000 1101 kkkk kkkk
Description: An unsigned multiplication is carried
out between the contents of W and the
8-bit literal ‘k’. The 16-bit result is
placed in the PRODH:PRODL register
pair. PRODH contains the high byte.
W is unchanged.
None of the Status flags are affected.
Note that neither Overflow nor Carry is
possible in this operation. A Zero result
is possible but not detected.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
literal ‘k’
Process
Data
Write
registers
PRODH:
PRODL
Example: MULLW 0C4h
Before Instruction
W=E2h
PRODH = ?
PRODL = ?
After Instruction
W=E2h
PRODH = ADh
PRODL = 08h
MULWF Multiply W w ith f
Syntax: MULWF f {,a}
Operands: 0 f 255
a [0,1]
Operation: (W) x (f) PRODH:PRODL
Status Affected: None
Encoding: 0000 001a ffff ffff
Description: An unsigned multiplication is carried out
between the contents of W and the
register file location ‘f’. The 16-bit result is
stored in the PRODH:PRODL register
pair. PRODH contains the high byte. Both
W and ‘f’ are unchanged.
None of the Status flags are affected.
Note that neither Overflow nor Carry is
possible in this operation. A Zero result is
possible but not detected.
If ‘a’ is ‘0’, the Access Bank is selected. If
‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction set
is enabled, this instruction operates in
Indexed Literal Offset Addressing mode
whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Index ed
Literal Offset Mod e” for details.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write
registers
PRODH:
PRODL
Example: MULWF REG, 1
Before Instruction
W=C4h
REG = B5h
PRODH = ?
PRODL = ?
After Instruction
W=C4h
REG = B5h
PRODH = 8Ah
PRODL = 94h
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NEGF Neg ate f
Syntax: NEGF f {,a}
Operands: 0 f 255
a [0,1]
Operation: (f) + 1 f
Status Affected: N, OV, C, DC, Z
Encoding: 0110 110a ffff ffff
Description: Location ‘f’ is negated using two’s
complement. The result is placed in the
data memory location ‘f’.
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Indexed
Liter a l Offset Mod e” for details.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write
register ‘f’
Example: NEGF REG, 1
Before Instruction
REG = 0011 1010 [3Ah]
After Instruction
REG = 1100 0110 [C6h]
NOP No Operation
Syntax: NOP
Operands: None
Operation: No operation
Status Affected: None
Encoding: 0000
1111 0000
xxxx 0000
xxxx 0000
xxxx
Description: No operation.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode No
operation
No
operation
No
operation
Example:
None.
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POP Pop Top of Return Stack
Syntax: POP
Operands: None
Operation: (TOS) bit bucket
Status Affected: None
Encoding: 0000 0000 0000 0110
Description: The TOS value is pulled off the return
stack and is discarded. The TOS value
then becomes the previous value that
was pushed onto the return stack.
This instruction is provided to enable
the user to properly manage the return
stack to incorporate a software stack.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode No
operation
POP TOS
value
No
operation
Example: POP
GOTO NEW
Before Instruction
TOS = 0031A2h
Stack (1 level down) = 014332h
After Instruction
TOS = 014332h
PC = NEW
PUSH Push Top of Return Stack
Syntax: PUSH
Operands: None
Operation: (PC + 2) TOS
Status Affected: None
Encoding: 0000 0000 0000 0101
Description: The PC + 2 is pushed onto the top of
the return stack. The previous TOS
value is pushed down on the stack.
This instruction allows implementing a
software stack by modifying TOS and
then pushing it onto the return stack.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode PUSH
PC + 2 onto
return stack
No
operation
No
operation
Example: PUSH
Before Instruction
TOS = 345Ah
PC = 0124h
After Instruction
PC = 0126h
TOS = 0126h
Stack (1 level down) = 345Ah
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RCALL Relative Call
Syntax: RCALL n
Operands: -1024 n 1023
Operation: (PC) + 2 TOS,
(PC) + 2 + 2n PC
Status Affected: None
Encoding: 1101 1nnn nnnn nnnn
Description: Subroutine call with a jump up to 1K
from the current location. First, return
address (PC + 2) is pushed onto the
stack. Then, add the 2’s complement
number ‘2n’ to the PC. Since the PC will
have incremented to fetch the next
instruction, the new address will be
PC + 2 + 2n. This instruction is a
two-cycle instruction.
Words: 1
Cycles: 2
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read literal
‘n’
PUSH PC
to stack
Process
Data
Write to PC
No
operation
No
operation
No
operation
No
operation
Example: HERE RCALL Jump
Before Instruction
PC = Address (HERE)
After Instruction
PC = Address (Jump)
TOS = Address (HERE + 2)
RESET Reset
Syntax: RESET
Operands: None
Operation: Reset all registers and flags that are
affected by a MCLR Reset.
Status Affected: All
Encoding: 0000 0000 1111 1111
Description: This instruction provides a way to
execute a MCLR Reset in software.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Start
reset
No
operation
No
operation
Example: RESET
After Instruction
Registers = Reset Value
Flags* = Reset Value
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RETFIE Return from Interrupt
Syntax: RETFIE {s}
Operands: s [0,1]
Operation: (TOS) PC,
1 GIE/GIEH or PEIE/GIEL;
if s = 1,
(WS) W,
(STATUSS) STATUS,
(BSRS) BSR,
PCLATU, PCLATH are unchanged
Status Affected: GIE/GIEH, PEIE/GIEL.
Encoding: 0000 0000 0001 000s
Description: Return from interrupt. Stack is popped
and Top-of-Stack (TOS) is loaded into
the PC. Interrupts are enabled by
setting either the high or low-priority
global interrupt enable bit. If ‘s’ = 1, the
contents of the shadow registers, WS,
STATUSS and BSRS, are loaded into
their corresponding registers, W,
STATUS and BSR. If ‘s’ = 0, no update
of these registers occurs (default).
Words: 1
Cycles: 2
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode No
operation
No
operation
POP PC
from stack
Set GIEH or
GIEL
No
operation
No
operation
No
operation
No
operation
Example: RETFIE 1
After Interrupt
PC = TOS
W=WS
BSR = BSRS
STATUS = STATUSS
GIE/GIEH, PEIE/GIEL = 1
RETLW Return Literal to W
Syntax: RETLW k
Operands: 0 k 255
Operation: k W,
(TOS) PC,
PCLATU, PCLATH are unchanged
Status Affected: None
Encoding: 0000 1100 kkkk kkkk
Description: W is loaded with the eight-bit literal ‘k’.
The program counter is loaded from the
top of the stack (the return address).
The high address latch (PCLATH)
remains unchanged.
Words: 1
Cycles: 2
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
literal ‘k’
Process
Data
POP PC
from stack,
write to W
No
operation
No
operation
No
operation
No
operation
Example:
CALL TABLE ; W contains table
; offset value
; W now has
; table value
:
TABLE
ADDWF PCL ; W = offset
RETLW k0 ; Begin table
RETLW k1 ;
:
:RETLW kn ; End of table
Before Instruction
W = 07h
After Instruction
W = value of kn
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RETURN Return from Subroutine
Syntax: RETURN {s}
Operands: s [0,1]
Operation: (TOS) PC;
if s = 1,
(WS) W,
(STATUSS) STATUS,
(BSRS) BSR,
PCLATU, PCLATH are unchanged
Status Affected: None
Encoding: 0000 0000 0001 001s
Description: Return from subroutine. The stack is
popped and the top of the stack (TOS)
is loaded into the program counter. If
‘s’= 1, the contents of the shadow
registers, WS, STATUSS and BSRS,
are loaded into their corresponding
registers, W, STATUS and BSR. If
‘s’ = 0, no update of these registers
occurs (default).
Words: 1
Cycles: 2
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode No
operation
Process
Data
POP PC
from stack
No
operation
No
operation
No
operation
No
operation
Example: RETURN
After Instruction:
PC = TOS
RLCF Rotate Left f through Carry
Syntax: RLCF f {,d {,a}}
Operands: 0 f 255
d [0,1]
a [0,1]
Operation: (f<n>) dest<n + 1>,
(f<7>) C,
(C) dest<0>
Status Affected: C, N, Z
Encoding: 0011 01da ffff ffff
Description: The contents of register ‘f’ are rotated
one bit to the left through the Carry flag.
If ‘d’ is ‘0’, the result is placed in W. If ‘d’
is ‘1’, the result is stored back in register
‘f’ (default).
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Index ed
Literal Offset Mod e” for details.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write to
destination
Example: RLCF REG, 0, 0
Before Instruction
REG = 1110 0110
C=0
After Instruction
REG = 1110 0110
W=1100 1100
C=1
Cregister f
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RLNCF Rotate Left f (No Carry)
Syntax: RLNCF f {,d {,a}}
Operands: 0 f 255
d [0,1]
a [0,1]
Operation: (f<n>) dest<n + 1>,
(f<7>) dest<0>
Status Affected: N, Z
Encoding: 0100 01da ffff ffff
Description: The contents of register ‘f’ are rotated
one bit to the left. If ‘d’ is ‘0’, the result
is placed in W. If ‘d’ is ‘1’, the result is
stored back in register ‘f’ (default).
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructi ons in Indexed
Literal Offset Mode” for details.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write to
destination
Example: RLNCF REG, 1, 0
Before Instruction
REG = 1010 1011
After Instruction
REG = 0101 0111
RRCF Rot ate Right f through Carry
Syntax: RRCF f {,d {,a}}
Operands: 0 f 255
d [0,1]
a [0,1]
Operation: (f<n>) dest<n – 1>,
(f<0>) C,
(C) dest<7>
Status Affected: C, N, Z
Encoding: 0011 00da ffff ffff
Description: The contents of register ‘f’ are rotated
one bit to the right through the Carry
flag. If ‘d’ is ‘0’, the result is placed in W.
If ‘d’ is ‘1’, the result is placed back in
register ‘f’ (default).
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Index e d
Literal Offset Mode” for details.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write to
destination
Example: RRCF REG, 0, 0
Before Instruction
REG = 1110 0110
C=0
After Instruction
REG = 1110 0110
W=0111 0011
C=0
Cregister f
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RRNCF Rotate Right f (No Carry)
Syntax: RRNCF f {,d {,a}}
Operands: 0 f 255
d [0,1]
a [0,1]
Operation: (f<n>) dest<n – 1>,
(f<0>) dest<7>
Status Affected: N, Z
Encoding: 0100 00da ffff ffff
Description: The contents of register ‘f’ are rotated
one bit to the right. If ‘d’ is ‘0’, the result
is placed in W. If ‘d’ is ‘1’, the result is
placed back in register ‘f’ (default).
If ‘a’ is ‘0’, the Access Bank will be
selected, overriding the BSR value. If ‘a’
is ‘1’, then the bank will be selected as
per the BSR value (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Indexed
Literal Offset Mode” for details.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write to
destination
Example 1: RRNCF REG, 1, 0
Before Instruction
REG = 1101 0111
After Instruction
REG = 1110 1011
Example 2: RRNCF REG, 0, 0
Before Instruction
W=?
REG = 1101 0111
After Instruction
W=1110 1011
REG = 1101 0111
register f
SETF Set f
Syntax: SETF f {,a}
Operands: 0 f 255
a [0,1]
Operation: FFh f
Status Affected: None
Encoding: 0110 100a ffff ffff
Description: The contents of the specified register
are set to FFh.
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Index e d
Literal Offset Mode” for details.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write
register ‘f’
Example: SETF REG,1
Before Instruction
REG = 5Ah
After Instruction
REG = FFh
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SLEEP Enter Sleep Mod e
Syntax: SLEEP
Operands: None
Operation: 00h WDT,
0 WDT postscaler,
1 TO,
0 PD
Status Affected: TO, PD
Encoding: 0000 0000 0000 0011
Description: The Power-Down status bit (PD) is
cleared. The Time-out status bit (TO)
is set. The Watchdog Timer and its
postscaler are cleared.
The processor is put into Sleep mode
with the oscillator stopped.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode No
operation
Process
Data
Go to
Sleep
Example: SLEEP
Before Instruction
TO =?
PD =?
After Instruction
TO =1 †
PD =0
† If WDT causes wake-up, this bit is cleared.
SUBFWB Subtract f f r om W with Borrow
Syntax: SUBFWB f {,d {,a}}
Operands: 0 f 255
d [0,1]
a [0,1]
Operation: (W) – (f) – (C) dest
Status Affected: N, OV, C, DC, Z
Encoding: 0101 01da ffff ffff
Description: Subtract register ‘f’ and Carry flag
(borrow) from W (2’s complement
method). If ‘d’ is ‘0’, the result is stored in
W. If ‘d’ is ‘1’, the result is stored in
register ‘f’ (default).
If ‘a’ is ‘0’, the Access Bank is selected. If
‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates in
Indexed Literal Offset Addressing mode
whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Indexed
Literal Offset Mode” for details.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write to
destination
Example 1: SUBFWB REG, 1, 0
Before Instruction
REG = 3
W=2
C=1
After Instruction
REG = FF
W=2
C=0
Z=0
N = 1 ; result is negative
Example 2: SUBFWB REG, 0, 0
Before Instruction
REG = 2
W=5
C=1
After Instruction
REG = 2
W=3
C=1
Z=0
N = 0 ; result is positive
Example 3: SUBFWB REG, 1, 0
Before Instruction
REG = 1
W=2
C=0
After Instruction
REG = 0
W=2
C=1
Z = 1 ; result is zero
N=0
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SUBLW Subtract W from Literal
Syntax: SUBLW k
Operands: 0 k 255
Operation: k – (W) W
Status Affected: N, OV, C, DC, Z
Encoding: 0000 1000 kkkk kkkk
Description: W is subtracted from the eight-bit
literal ‘k’. The result is placed in W.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
literal ‘k’
Process
Data
Write to
W
Example 1: SUBLW 02h
Before Instruction
W = 01h
C=?
After Instruction
W = 01h
C=1 ; result is positive
Z=0
N=0
Example 2: SUBLW 02h
Before Instruction
W = 02h
C=?
After Instruction
W = 00h
C=1 ; result is zero
Z=1
N=0
Example 3: SUBLW 02h
Before Instruction
W = 03h
C=?
After Instruction
W = FFh ; (2’s complement)
C=0 ; result is negative
Z=0
N=1
SUBWF Subtract W from f
Syntax: SUBWF f {,d {,a}}
Operands: 0 f 255
d [0,1]
a [0,1]
Operation: (f) – (W) dest
Status Affected: N, OV, C, DC, Z
Encoding: 0101 11da ffff ffff
Description: Subtract W from register ‘f’ (2’s
complement method). If ‘d’ is ‘0’, the
result is stored in W. If ‘d’ is ‘1’, the result
is stored back in register ‘f’ (default).
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Indexed
Liter a l Offset Mod e” for details.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write to
destination
Example 1: SUBWF REG, 1, 0
Before Instruction
REG = 3
W=2
C=?
After Instruction
REG = 1
W=2
C = 1 ; result is positive
Z=0
N=0
Example 2: SUBWF REG, 0, 0
Before Instruction
REG = 2
W=2
C=?
After Instruction
REG = 2
W=0
C = 1 ; result is zero
Z=1
N=0
Example 3: SUBWF REG, 1, 0
Before Instruction
REG = 1
W=2
C=?
After Instruction
REG = FFh ;(2’s complement)
W=2
C = 0 ; result is negative
Z=0
N=1
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SUBWFB Subtract W from f with Borrow
Syntax: SUBWFB f {,d {,a}}
Operands: 0 f 255
d [0,1]
a [0,1]
Operation: (f) – (W) – (C) dest
Status Affected: N, OV, C, DC, Z
Encoding: 0101 10da ffff ffff
Description: Subtract W and the Carry flag (borrow)
from register ‘f’ (2’s complement
method). If ‘d’ is ‘0’, the result is stored
in W. If ‘d’ is ‘1’, the result is stored back
in register ‘f’ (default).
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Indexed
Literal Offset Mode” for details.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write to
destination
Example 1: SUBWFB REG, 1, 0
Before Instruction
REG = 19h (0001 1001)
W=0Dh(0000 1101)
C=1
After Instruction
REG = 0Ch (0000 1011)
W=0Dh(0000 1101)
C=1
Z=0
N=0 ; result is positive
Example 2: SUBWFB REG, 0, 0
Before Instruction
REG = 1Bh (0001 1011)
W=1Ah(0001 1010)
C=0
After Instruction
REG = 1Bh (0001 1011)
W = 00h
C=1
Z=1 ; result is zero
N=0
Example 3: SUBWFB REG, 1, 0
Before Instruction
REG = 03h (0000 0011)
W=0Eh(0000 1101)
C=1
After Instruction
REG = F5h (1111 0100)
; [2’s comp]
W=0Eh(0000 1101)
C=0
Z=0
N=1 ; result is negative
SW APF Swap f
Syntax: SWAPF f {,d {,a}}
Operands: 0 f 255
d [0,1]
a [0,1]
Operation: (f<3:0>) dest<7:4>,
(f<7:4>) dest<3:0>
Status Affected: None
Encoding: 0011 10da ffff ffff
Description: The upper and lower nibbles of register
‘f’ are exchanged. If ‘d’ is ‘0’, the result
is placed in W. If ‘d’ is ‘1’, the result is
placed in register ‘f’ (default).
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Index e d
Literal Offset Mode” for details.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write to
destination
Example: SWAPF REG, 1, 0
Before Instruction
REG = 53h
After Instruction
REG = 35h
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TBLRD Table Read
Syntax: TBLRD ( *; *+; *-; +*)
Operands: None
Operation: if TBLRD *,
(Prog Mem (TBLPTR)) TABLAT;
TBLPTR – No Change
if TBLRD *+,
(Prog Mem (TBLPTR)) TABLAT;
(TBLPTR) + 1 TBLPTR
if TBLRD *-,
(Prog Mem (TBLPTR)) TABLAT;
(TBLPTR) – 1 TBLPTR
if TBLRD +*,
(TBLPTR) + 1 TBLPTR;
(Prog Mem (TBLPTR)) TABLAT
Status Affected: None
Encoding: 0000 0000 0000 10nn
nn=0 *
=1 *+
=2 *-
=3 +*
Description: This instruction is used to read the contents
of Program Memory (P.M.). To address the
program memory, a pointer called Table
Pointer (TBLPTR) is used.
The TBLPTR (a 21-bit pointer) points to
each byte in the program memory. TBLPTR
has a 2-Mbyte address range.
TBLPTR[0] = 0: Least Significant Byte of
Program Memory Word
TBLPTR[0] = 1: Most Significant Byte of
Program Memory Word
The TBLRD instruction can modify the value
of TBLPTR as follows:
• no change
• post-increment
• post-decrement
• pre-increment
Words: 1
Cycles: 2
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode No
operation
No
operation
No
operation
No
operation
No operation
(Read Program
Memory)
No
operation
No operation
(Write
TABLAT)
TBLRD Table Read (Conti nue d)
Example 1: TBLRD *+ ;
Before Instruction
TABLAT = 55h
TBLPTR = 00A356h
MEMORY(00A356h) = 34h
After Instruction
TABLAT = 34h
TBLPTR = 00A357h
Example 2: TBLRD +* ;
Before Instruction
TABLAT = AAh
TBLPTR = 01A357h
MEMORY(01A357h) = 12h
MEMORY(01A358h) = 34h
After Instruction
TABLAT = 34h
TBLPTR = 01A358h
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TBLWT Table Write
Syntax: TBLWT ( *; *+; *-; +*)
Operands: None
Operation: if TBLWT*,
(TABLAT) Holding Register;
TBLPTR – No Change
if TBLWT*+,
(TABLAT) Holding Register;
(TBLPTR) + 1 TBLPTR
if TBLWT*-,
(TABLAT) Holding Register;
(TBLPTR) – 1 TBLPTR
if TBLWT+*,
(TBLPTR) + 1 TBLPTR;
(TABLAT) Holding Register
Status Affected: None
Encoding: 0000 0000 0000 11nn
nn=0 *
=1 *+
=2 *-
=3 +*
Description: This instruction uses the 3 LSBs of
TBLPTR to determine which of the
8 holding registers the TABLAT is written
to. The holding registers are used to
program the contents of Program Memory
(P.M.). (Refer to Section 6.0 “Memory
Organization” for additional details on
programming Flash memory.)
The TBLPTR (a 21-bit pointer) points to
each byte in the program memory.
TBLPTR has a 2-Mbyte address range.
The LSb of the TBLPTR selects which
byte of the program memory location to
access.
TBLPTR[0] = 0: Least Significant Byte
of Program Memory
Word
TBLPTR[0] = 1: Most Significant Byte
of Program Memory
Word
The TBLWT instruction can modify the
value of TBLPTR as follows:
• no change
• post-increment
• post-decrement
• pre-increment
Words: 1
Cycles: 2
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode No
operation
No
operation
No
operation
No
operation
No
operation
(Read
TABLAT)
No
operation
No
operation
(Write to
Holding
Register)
TBLWT Table Write (Continued)
Example 1: TBLWT *+;
Before Instruction
TABLAT = 55h
TBLPTR = 00A356h
HOLDING REGISTER
(00A356h) = FFh
After Instructions (table write completion)
TABLAT = 55h
TBLPTR = 00A357h
HOLDING REGISTER
(00A356h) = 55h
Example 2: TBLWT +*;
Before Instruction
TABLAT = 34h
TBLPTR = 01389Ah
HOLDING REGISTER
(01389Ah) = FFh
HOLDING REGISTER
(01389Bh) = FFh
After Instruction (table write completion)
TABLAT = 34h
TBLPTR = 01389Bh
HOLDING REGISTER
(01389Ah) = FFh
HOLDING REGISTER
(01389Bh) = 34h
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TST FSZ Test f, S k ip if 0
Syntax: TSTFSZ f {,a}
Operands: 0 f 255
a [0,1]
Operation: skip if f = 0
Status Affected: None
Encoding: 0110 011a ffff ffff
Description: If ‘f’ = 0, the next instruction fetched
during the current instruction execution
is discarded and a NOP is executed,
making this a two-cycle instruction.
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Indexed
Literal Offset Mode” for details.
Words: 1
Cycles: 1(2)
Note: 3 cycles if skip and followed
by a 2-word instruction.
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
No
operation
If skip:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
If skip and followed by 2-word instruction:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
Example: HERE TSTFSZ CNT, 1
NZERO :
ZERO :
Before Instruction
PC = Address (HERE)
After Instruction
If CNT = 00h,
PC = Address (ZERO)
If CNT 00h,
PC = Address (NZERO)
XORLW Exclu sive OR Literal with W
Syntax: XORLW k
Operands: 0 k 255
Operation: (W) .XOR. k W
Status Affected: N, Z
Encoding: 0000 1010 kkkk kkkk
Description: The contents of W are XORed with
the 8-bit literal ‘k’. The result is placed
in W.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
literal ‘k’
Process
Data
Write to
W
Example: XORLW 0xAF
Before Instruction
W=B5h
After Instruction
W=1Ah
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XORWF Exclusive OR W with f
Syntax: XORWF f {,d {,a}}
Operands: 0 f 255
d [0,1]
a [0,1]
Operation: (W) .XOR. (f) dest
Status Affected: N, Z
Encoding: 0001 10da ffff ffff
Description: Exclusive OR the contents of W with
register ‘f’. If ‘d’ is ‘0’, the result is stored
in W. If ‘d’ is ‘1’, the result is stored back
in the register ‘f’ (default).
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f 95 (5Fh). See
Section 28.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Indexed
Literal Offset Mode” for details.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write to
destination
Example: XORWF REG, 1, 0
Before Instruction
REG = AFh
W=B5h
After Instruction
REG = 1Ah
W=B5h
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PIC18F47J13 FAMILY
28.2 Extended Instruction Set
In addition to the standard 75 instructions of the PIC18
instruction set, the PIC18F47J13 family of devices also
provide an optional extension to the core CPU function-
ality. The added features include eight additional
instructions that augment Indirect and Indexed
Addressing operations and the implementation of
Indexed Literal Offset Addressing for many of the
standard PIC18 instructions.
The additional features of the extended instruction set
are enabled by default on unprogrammed devices.
Users must properly set or clear the XINST Configura-
tion bit during programming to enable or disable these
features.
The instructions in the extended set can all be
classified as literal operations, which either manipulate
the File Select Registers or use them for Indexed
Addressing. Two of the instructions, ADDFSR and
SUBFSR, each have an additional special instantiation
for using FSR2. These versions (ADDULNK and
SUBULNK) allow for automatic return after execution.
The extended instructions are specifically implemented
to optimize re-entrant program code (that is, code that
is recursive or that uses a software stack) written in
high-level languages, particularly C. Among other
things, they allow users working in high-level
languages to perform certain operations on data
structures more efficiently. These include:
• Dynamic allocation and deallocation of software
stack space when entering and leaving
subroutines
• Function Pointer invocation
• Software Stack Pointer manipulation
• Manipulation of variables located in a software
stack
A summary of the instructions in the extended instruc-
tion set is provided in Table 28-3. Detailed descriptions
are provided in Section 28.2.2 “Extended Instruction
Set”. The opcode field descriptions in Table 28-1
(page 434) apply to both the standard and extended
PIC18 instruction sets.
28.2.1 EXTENDED INSTRUCTION SYNTAX
Most of the extended instructions use indexed argu-
ments, using one of the File Select Registers and some
offset to specify a source or destination register. When
an argument for an instruction serves as part of
Indexed Addressing, it is enclosed in square brackets
(“[ ]”). This is done to indicate that the argument is used
as an index or offset. The MPASM™ Assembler will
flag an error if it determines that an index or offset value
is not bracketed.
When the extended instruction set is enabled, brackets
are also used to indicate index arguments in
byte-oriented and bit-oriented instructions. This is in
addition to other changes in their syntax. For more
details, see Section 28.2.3.1 “Extended Instruction
Syntax with Standard PIC18 Commands”.
TABLE 28-3: EXTENSIONS TO THE PIC18 INSTRUCTION SET
Note: The instruction set extension and the
Indexed Literal Offset Addressing mode
were designed for optimizing applications
written in C. The user may likely never use
these instructions directly in the assembler.
The syntax for these commands is
provided as a reference for users who may
be reviewing code that has been generated
by a compiler.
Note: In the past, square brackets have been
used to denote optional arguments in the
PIC18 and earlier instruction sets. In this
text and going forward, optional
arguments are denoted by braces (“{ }”).
Mnemonic,
Operands Description Cycles 16-Bit Instruction Word Status
Affected
MSb LSb
ADDFSR
ADDULNK
CALLW
MOVSF
MOVSS
PUSHL
SUBFSR
SUBULNK
f, k
k
zs, fd
zs, zd
k
f, k
k
Add Literal to FSR
Add Literal to FSR2 and Return
Call Subroutine using WREG
Move zs (source) to 1st word
fd (destination) 2nd word
Move zs (source) to 1st word
zd (destination) 2nd word
Store Literal at FSR2,
Decrement FSR2
Subtract Literal from FSR
Subtract Literal from FSR2 and
return
1
2
2
2
2
1
1
2
1110
1110
0000
1110
1111
1110
1111
1110
1110
1110
1000
1000
0000
1011
ffff
1011
xxxx
1010
1001
1001
ffkk
11kk
0001
0zzz
ffff
1zzz
xzzz
kkkk
ffkk
11kk
kkkk
kkkk
0100
zzzz
ffff
zzzz
zzzz
kkkk
kkkk
kkkk
None
None
None
None
None
None
None
None
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28.2.2 EXTENDED INSTRUCTION SET
ADDFSR Add Literal to FSR
Syntax: ADDFSR f, k
Operands: 0 k 63
f [ 0, 1, 2 ]
Operation: FSR(f) + k FSR(f)
Status Affected: None
Encoding: 1110 1000 ffkk kkkk
Description: The 6-bit literal ‘k’ is added to the
contents of the FSR specified by ‘f’.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
literal ‘k’
Process
Data
Write to
FSR
Example: ADDFSR 2, 0x23
Before Instruction
FSR2 = 03FFh
After Instruction
FSR2 = 0422h
ADDULNK Add Literal to FSR2 and Return
Syntax: ADDULNK k
Operands: 0 k 63
Operation: FSR2 + k FSR2,
(TOS) PC
Status Affected: None
Encoding: 1110 1000 11kk kkkk
Description: The 6-bit literal ‘k’ is added to the
contents of FSR2. A RETURN is then
executed by loading the PC with the
TOS.
The instruction takes two cycles to
execute; a NOP is performed during
the second cycle.
This may be thought of as a special
case of the ADDFSR instruction,
where f = 3 (binary ‘11’); it operates
only on FSR2.
Words: 1
Cycles: 2
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
literal ‘k’
Process
Data
Write to
FSR
No
Operation
No
Operation
No
Operation
No
Operation
Example: ADDULNK 0x23
Before Instruction
FSR2 = 03FFh
PC = 0100h
After Instruction
FSR2 = 0422h
PC = (TOS)
Note: All PIC18 instructions may take an optional label argument preceding the instruction mnemonic for use in
symbolic addressing. If a label is used, the instruction format then becomes: {label} instruction argument(s).
2010 Microchip Technology Inc. Preliminary DS39974A-page 477
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CALLW Subroutine Call Using WREG
Syntax: CALLW
Operands: None
Operation: (PC + 2) TOS,
(W) PCL,
(PCLATH) PCH,
(PCLATU) PCU
Status Affected: None
Encoding: 0000 0000 0001 0100
Description First, the return address (PC + 2) is
pushed onto the return stack. Next, the
contents of W are written to PCL; the
existing value is discarded. Then, the
contents of PCLATH and PCLATU are
latched into PCH and PCU,
respectively. The second cycle is
executed as a NOP instruction while the
new next instruction is fetched.
Unlike CALL, there is no option to
update W, STATUS or BSR.
Words: 1
Cycles: 2
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
WREG
Push PC to
stack
No
operation
No
operation
No
operation
No
operation
No
operation
Example: HERE CALLW
Before Instruction
PC = address (HERE)
PCLATH = 10h
PCLATU = 00h
W = 06h
After Instruction
PC = 001006h
TOS = address (HERE + 2)
PCLATH = 10h
PCLATU = 00h
W = 06h
MOV S F Move In de xed t o f
Syntax: MOVSF [zs], fd
Operands: 0 zs 127
0 fd 4095
Operation: ((FSR2) + zs) fd
Status Affected: None
Encoding:
1st word (source)
2nd word (destin.)
1110
1111 1011
ffff 0zzz
ffff zzzzs
ffffd
Description: The contents of the source register are
moved to destination register ‘fd’. The
actual address of the source register is
determined by adding the 7-bit literal
offset ‘zs’, in the first word, to the value
of FSR2. The address of the destination
register is specified by the 12-bit literal
‘fd’ in the second word. Both addresses
can be anywhere in the 4096-byte data
space (000h to FFFh).
The MOVSF instruction cannot use the
PCL, TOSU, TOSH or TOSL as the
destination register.
If the resultant source address points to
an Indirect Addressing register, the
value returned will be 00h.
Words: 2
Cycles: 2
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Determine
source addr
Determine
source addr
Read
source reg
Decode No
operation
No dummy
read
No
operation
Write
register ‘f’
(dest)
Example: MOVSF [0x05], REG2
Before Instruction
FSR2 = 80h
Contents
of 85h = 33h
REG2 = 11h
After Instruction
FSR2 = 80h
Contents
of 85h = 33h
REG2 = 33h
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MOVSS Move Indexed to Indexed
Syntax: MOVSS [zs], [zd]
Operands: 0 zs 127
0 zd 127
Operation: ((FSR2) + zs) ((FSR2) + zd)
Status Affected: None
Encoding:
1st word (source)
2nd word (dest.)
1110
1111 1011
xxxx 1zzz
xzzz zzzzs
zzzzd
Description The contents of the source register are
moved to the destination register. The
addresses of the source and destination
registers are determined by adding the
7-bit literal offsets, ‘zs’ or ‘zd’,
respectively, to the value of FSR2. Both
registers can be located anywhere in
the 4096-byte data memory space
(000h to FFFh).
The MOVSS instruction cannot use the
PCL, TOSU, TOSH or TOSL as the
destination register.
If the resultant source address points to
an Indirect Addressing register, the
value returned will be 00h. If the
resultant destination address points to
an Indirect Addressing register, the
instruction will execute as a NOP.
Words: 2
Cycles: 2
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Determine
source addr
Determine
source addr
Read
source reg
Decode Determine
dest addr
Determine
dest addr
Write
to dest reg
Example: MOVSS [0x05], [0x06]
Before Instruction
FSR2 = 80h
Contents
of 85h = 33h
Contents
of 86h = 11h
After Instruction
FSR2 = 80h
Contents
of 85h = 33h
Contents
of 86h = 33h
PUSHL Store Literal at FSR2, Decrement FSR2
Syntax: PUSHL k
Operands: 0k 255
Operation: k (FSR2),
FSR2 – 1 FSR2
Status Affected: None
Encoding: 1110 1010 kkkk kkkk
Description: The 8-bit literal ‘k’ is written to the data
memory address specified by FSR2.
FSR2 is decremented by 1 after the
operation.
This instruction allows users to push
values onto a software stack.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read ‘k’ Process
data
Write to
destination
Example: PUSHL 0x08
Before Instruction
FSR2H:FSR2L = 01ECh
Memory (01ECh) = 00h
After Instruction
FSR2H:FSR2L = 01EBh
Memory (01ECh) = 08h
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SUBFSR Subtract Literal from FSR
Syntax: SUBFSR f, k
Operands: 0 k 63
f [ 0, 1, 2 ]
Operation: FSRf – k FSRf
Status Affected: None
Encoding: 1110 1001 ffkk kkkk
Description: The 6-bit literal ‘k’ is subtracted from
the contents of the FSR specified
by ‘f’.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write to
destination
Example: SUBFSR 2, 0x23
Before Instruction
FSR2 = 03FFh
After Instruction
FSR2 = 03DCh
SUBULNK Subtrac t Literal fr om FSR 2 and R e turn
Syntax: SUBULNK k
Operands: 0 k 63
Operation: FSR2 – k FSR2,
(TOS) PC
Status Affected: None
Encoding: 1110 1001 11kk kkkk
Description: The 6-bit literal ‘k’ is subtracted from the
contents of the FSR2. A RETURN is then
executed by loading the PC with the
TOS.
The instruction takes two cycles to
execute; a NOP is performed during the
second cycle.
This may be thought of as a special case
of the SUBFSR instruction, where f = 3
(binary ‘11’); it operates only on FSR2.
Words: 1
Cycles: 2
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write to
destination
No
Operation
No
Operation
No
Operation
No
Operation
Example: SUBULNK 0x23
Before Instruction
FSR2 = 03FFh
PC = 0100h
After Instruction
FSR2 = 03DCh
PC = (TOS)
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28.2.3 BYTE-ORIENTED AND
BIT-ORIENTED INSTRUCTIONS IN
INDEXED LITERAL OFFSET MODE
In addition to eight new commands in the extended set,
enabling the extended instruction set also enables
Indexed Literal Offset Addressing (Section 6.6.1
“Indexed Addressing with Literal Offset”). This has
a significant impact on the way that many commands of
the standard PIC18 instruction set are interpreted.
When the extended set is disabled, addresses embed-
ded in opcodes are treated as literal memory locations:
either as a location in the Access Bank (a = 0) or in a
GPR bank designated by the BSR (a = 1). When the
extended instruction set is enabled and a = 0, however,
a file register argument of 5Fh or less is interpreted as
an offset from the pointer value in FSR2 and not as a
literal address. For practical purposes, this means that
all instructions that use the Access RAM bit as an
argument – that is, all byte-oriented and bit-oriented
instructions, or almost half of the core PIC18 instruc-
tions – may behave differently when the extended
instruction set is enabled.
When the content of FSR2 is 00h, the boundaries of the
Access RAM are essentially remapped to their original
values. This may be useful in creating
backward-compatible code. If this technique is used, it
may be necessary to save the value of FSR2 and
restore it when moving back and forth between C and
assembly routines in order to preserve the Stack
Pointer. Users must also keep in mind the syntax
requirements of the extended instruction set (see
Section 28.2.3.1 “Extended Instruction Syntax with
Standard PIC18 Commands”).
Although the Indexed Literal Offset mode can be very
useful for dynamic stack and pointer manipulation, it
can also be very annoying if a simple arithmetic opera-
tion is carried out on the wrong register. Users who are
accustomed to the PIC18 programming must keep in
mind that, when the extended instruction set is
enabled, register addresses of 5Fh or less are used for
Indexed Literal Offset Addressing.
Representative examples of typical byte-oriented and
bit-oriented instructions in the Indexed Literal Offset
mode are provided on the following page to show how
execution is affected. The operand conditions shown in
the examples are applicable to all instructions of these
types.
28.2.3.1 Extended Instruction Syntax with
Standard PIC18 Commands
When the extended instruction set is enabled, the file
register argument, ‘f’, in the standard byte-oriented and
bit-oriented commands is replaced with the literal offset
value, ‘k’. As already noted, this occurs only when ‘f’ is
less than or equal to 5Fh. When an offset value is used,
it must be indicated by square brackets (“[ ]”). As with
the extended instructions, the use of brackets indicates
to the compiler that the value is to be interpreted as an
index or an offset. Omitting the brackets, or using a
value greater than 5Fh within the brackets, will
generate an error in the MPASM Assembler.
If the index argument is properly bracketed for Indexed
Literal Offset Addressing, the Access RAM argument is
never specified; it will automatically be assumed to be
‘0’. This is in contrast to standard operation (extended
instruction set disabled), when ‘a’ is set on the basis of
the target address. Declaring the Access RAM bit in
this mode will also generate an error in the MPASM
Assembler.
The destination argument ‘d’ functions as before.
In the latest versions of the MPASM Assembler,
language support for the extended instruction set must
be explicitly invoked. This is done with either the
command line option, /y, or the PE directive in the
source listing.
28.2.4 CONSIDERATIONS WHEN
ENABLING THE EXTENDED
INSTRUCTION SET
It is important to note that the extensions to the instruc-
tion set may not be beneficial to all users. In particular,
users who are not writing code that uses a software
stack may not benefit from using the extensions to the
instruction set.
Additionally, the Indexed Literal Offset Addressing
mode may create issues with legacy applications
written to the PIC18 assembler. This is because
instructions in the legacy code may attempt to address
registers in the Access Bank below 5Fh. Since these
addresses are interpreted as literal offsets to FSR2
when the instruction set extension is enabled, the
application may read or write to the wrong data
addresses.
When porting an application to the PIC18F47J13 family,
it is very important to consider the type of code. A large,
re-entrant application that is written in C and would
benefit from efficient compilation will do well when using
the instruction set extensions. Legacy applications that
heavily use the Access Bank will most likely not benefit
from using the extended instruction set.
Note: Enabling the PIC18 instruction set exten-
sion may cause legacy applications to
behave erratically or fail entirely.
2010 Microchip Technology Inc. Preliminary DS39974A-page 481
PIC18F47J13 FAMILY
ADDWF ADD W to Indexed
(Indexed Literal Offset mode)
Syntax: ADDWF [k] {,d}
Operands: 0 k 95
d [0,1]
Operation: (W) + ((FSR2) + k) dest
Status Affected: N, OV, C, DC, Z
Encoding: 0010 01d0 kkkk kkkk
Description: The contents of W are added to the
contents of the register indicated by
FSR2, offset by the value ‘k’.
If ‘d’ is ‘0’, the result is stored in W. If ‘d’
is ‘1’, the result is stored back in
register ‘f’ (default).
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read ‘k’ Process
Data
Write to
destination
Example: ADDWF [OFST] ,0
Before Instruction
W = 17h
OFST = 2Ch
FSR2 = 0A00h
Contents
of 0A2Ch = 20h
After Instruction
W = 37h
Contents
of 0A2Ch = 20h
BSF Bit Set Indexed
(Indexed Literal Offset mode)
Syntax: BSF [k], b
Operands: 0 f 95
0 b 7
Operation: 1 ((FSR2) + k)<b>
Status Affected: None
Encoding: 1000 bbb0 kkkk kkkk
Description: Bit ‘b’ of the register indicated by FSR2,
offset by the value ‘k’, is set.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write to
destination
Example: BSF [FLAG_OFST], 7
Before Instruction
FLAG_OFST = 0Ah
FSR2 = 0A00h
Contents
of 0A0Ah = 55h
After Instruction
Contents
of 0A0Ah = D5h
SETF Set Indexed
(Indexed Literal Offset mode)
Syntax: SETF [k]
Operands: 0 k 95
Operation: FFh ((FSR2) + k)
Status Affected: None
Encoding: 0110 1000 kkkk kkkk
Description: The contents of the register indicated by
FSR2, offset by ‘k’, are set to FFh.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read ‘k’ Process
Data
Write
register
Example: SETF [OFST]
Before Instruction
OFST = 2Ch
FSR2 = 0A00h
Contents
of 0A2Ch = 00h
After Instruction
Contents
of 0A2Ch = FFh
PIC18F47J13 FAMILY
DS39974A-page 482 Preliminary 2010 Microchip Technology Inc.
28.2.5 SPECIAL CONSIDERATIONS WITH
MICROCHIP MPLAB® IDE TOOLS
The latest versions of Microchip’s software tools have
been designed to fully support the extended instruction
set for the PIC18F47J13 family. This includes the
MPLAB C18 C Compiler, MPASM assembly language
and MPLAB Integrated Development Environment
(IDE).
When selecting a target device for software
development, MPLAB IDE will automatically set default
Configuration bits for that device. The default setting for
the XINST Configuration bit is ‘1’, enabling the
extended instruction set and Indexed Literal Offset
Addressing. For proper execution of applications
developed to take advantage of the extended
instruction set, XINST must be set during
programming.
To develop software for the extended instruction set,
the user must enable support for the instructions and
the Indexed Addressing mode in their language tool(s).
Depending on the environment being used, this may be
done in several ways:
• A menu option or dialog box within the
environment that allows the user to configure the
language tool and its settings for the project
• A command line option
• A directive in the source code
These options vary between different compilers,
assemblers and development environments. Users are
encouraged to review the documentation accompany-
ing their development systems for the appropriate
information.
2010 Microchip Technology Inc. Preliminary DS39974A-page 483
PIC18F47J13 FAMILY
29.0 DEVELOPMENT SUPPORT
The PIC® microcontrollers and dsPIC® digital signal
controllers are supported with a full range of software
and hardware development tools:
• Integrated Development Environment
- MPLAB® IDE Software
• Compilers/Assemblers/Linkers
- MPLAB C Compiler for Various Device
Families
- HI-TECH C for Various Device Families
- MPASMTM Assembler
-MPLINK
TM Object Linker/
MPLIBTM Object Librarian
- MPLAB Assembler/Linker/Librarian for
Various Device Families
• Simulators
- MPLAB SIM Software Simulator
•Emulators
- MPLAB REAL ICE™ In-Circuit Emulator
• In-Circuit Debuggers
- MPLAB ICD 3
- PICkit™ 3 Debug Express
• Device Programmers
- PICkit™ 2 Programmer
- MPLAB PM3 Device Programmer
• Low-Cost Demonstration/Development Boards,
Evaluation Kits, and Starter Kits
29.1 MPLAB Integrated Development
Environment Software
The MPLAB IDE software brings an ease of software
development previously unseen in the 8/16/32-bit
microcontroller market. The MPLAB IDE is a Windows®
operating system-based application that contains:
• A single graphical interface to all debugging tools
- Simulator
- Programmer (sold separately)
- In-Circuit Emulator (sold separately)
- In-Circuit Debugger (sold separately)
• A full-featured editor with color-coded context
• A multiple project manager
• Customizable data windows with direct edit of
contents
• High-level source code debugging
• Mouse over variable inspection
• Drag and drop variables from source to watch
windows
• Extensive on-line help
• Integration of select third party tools, such as
IAR C Compilers
The MPLAB IDE allows you to:
• Edit your source files (either C or assembly)
• One-touch compile or assemble, and download to
emulator and simulator tools (automatically
updates all project information)
• Debug using:
- Source files (C or assembly)
- Mixed C and assembly
- Machine code
MPLAB IDE supports multiple debugging tools in a
single development paradigm, from the cost-effective
simulators, through low-cost in-circuit debuggers, to
full-featured emulators. This eliminates the learning
curve when upgrading to tools with increased flexibility
and power.
PIC18F47J13 FAMILY
DS39974A-page 484 Preliminary 2010 Microchip Technology Inc.
29.2 MPLAB C Compilers for Various
Device Families
The MPLAB C Compiler code development systems
are complete ANSI C compilers for Microchip’s PIC18,
PIC24 and PIC32 families of microcontrollers and the
dsPIC30 and dsPIC33 families of digital signal control-
lers. These compilers provide powerful integration
capabilities, superior code optimization and ease of
use.
For easy source level debugging, the compilers provide
symbol information that is optimized to the MPLAB IDE
debugger.
29.3 HI-TECH C for Various Device
Families
The HI-TECH C Compiler code development systems
are complete ANSI C compilers for Microchip’s PIC
family of microcontrollers and the dsPIC family of digital
signal controllers. These compilers provide powerful
integration capabilities, omniscient code generation
and ease of use.
For easy source level debugging, the compilers provide
symbol information that is optimized to the MPLAB IDE
debugger.
The compilers include a macro assembler, linker, pre-
processor, and one-step driver, and can run on multiple
platforms.
29.4 MPASM Assembler
The MPASM Assembler is a full-featured, universal
macro assembler for PIC10/12/16/18 MCUs.
The MPASM Assembler generates relocatable object
files for the MPLINK Object Linker, Intel® standard HEX
files, MAP files to detail memory usage and symbol
reference, absolute LST files that contain source lines
and generated machine code and COFF files for
debugging.
The MPASM Assembler features include:
• Integration into MPLAB IDE projects
• User-defined macros to streamline
assembly code
• Conditional assembly for multi-purpose
source files
• Directives that allow complete control over the
assembly process
29.5 MPLINK Object Linker/
MPLIB Object Librarian
The MPLINK Object Linker combines relocatable
objects created by the MPASM Assembler and the
MPLAB C18 C Compiler. It can link relocatable objects
from precompiled libraries, using directives from a
linker script.
The MPLIB Object Librarian manages the creation and
modification of library files of precompiled code. When
a routine from a library is called from a source file, only
the modules that contain that routine will be linked in
with the application. This allows large libraries to be
used efficiently in many different applications.
The object linker/library features include:
• Efficient linking of single libraries instead of many
smaller files
• Enhanced code maintainability by grouping
related modules together
• Flexible creation of libraries with easy module
listing, replacement, deletion and extraction
29.6 MPLAB Assembler, Linker and
Librarian for Various Device
Families
MPLAB Assembler produces relocatable machine
code from symbolic assembly language for PIC24,
PIC32 and dsPIC devices. MPLAB C Compiler uses
the assembler to produce its object file. The assembler
generates relocatable object files that can then be
archived or linked with other relocatable object files and
archives to create an executable file. Notable features
of the assembler include:
• Support for the entire device instruction set
• Support for fixed-point and floating-point data
• Command line interface
• Rich directive set
• Flexible macro language
• MPLAB IDE compatibility
2010 Microchip Technology Inc. Preliminary DS39974A-page 485
PIC18F47J13 FAMILY
29.7 MPLAB SIM Software Simulator
The MPLAB SIM Software Simulator allows code
development in a PC-hosted environment by simulat-
ing the PIC MCUs and dsPIC® DSCs on an instruction
level. On any given instruction, the data areas can be
examined or modified and stimuli can be applied from
a comprehensive stimulus controller. Registers can be
logged to files for further run-time analysis. The trace
buffer and logic analyzer display extend the power of
the simulator to record and track program execution,
actions on I/O, most peripherals and internal registers.
The MPLAB SIM Software Simulator fully supports
symbolic debugging using the MPLAB C Compilers,
and the MPASM and MPLAB Assemblers. The soft-
ware simulator offers the flexibility to develop and
debug code outside of the hardware laboratory envi-
ronment, making it an excellent, economical software
development tool.
29.8 MPLAB REAL ICE In-Circuit
Emulator System
MPLAB REAL ICE In-Circuit Emulator System is
Microchip’s next generation high-speed emulator for
Microchip Flash DSC and MCU devices. It debugs and
programs PIC® Flash MCUs and dsPIC® Flash DSCs
with the easy-to-use, powerful graphical user interface of
the MPLAB Integrated Development Environment (IDE),
included with each kit.
The emulator is connected to the design engineer’s PC
using a high-speed USB 2.0 interface and is connected
to the target with either a connector compatible with in-
circuit debugger systems (RJ11) or with the new high-
speed, noise tolerant, Low-Voltage Differential Signal
(LVDS) interconnection (CAT5).
The emulator is field upgradable through future firmware
downloads in MPLAB IDE. In upcoming releases of
MPLAB IDE, new devices will be supported, and new
features will be added. MPLAB REAL ICE offers signifi-
cant advantages over competitive emulators including
low-cost, full-speed emulation, run-time variable
watches, trace analysis, complex breakpoints, a rugge-
dized probe interface and long (up to three meters) inter-
connection cables.
29.9 MPLAB ICD 3 In-Circuit Debugger
System
MPLAB ICD 3 In-Circuit Debugger System is Micro-
chip's most cost effective high-speed hardware
debugger/programmer for Microchip Flash Digital Sig-
nal Controller (DSC) and microcontroller (MCU)
devices. It debugs and programs PIC® Flash microcon-
trollers and dsPIC® DSCs with the powerful, yet easy-
to-use graphical user interface of MPLAB Integrated
Development Environment (IDE).
The MPLAB ICD 3 In-Circuit Debugger probe is con-
nected to the design engineer's PC using a high-speed
USB 2.0 interface and is connected to the target with a
connector compatible with the MPLAB ICD 2 or MPLAB
REAL ICE systems (RJ-11). MPLAB ICD 3 supports all
MPLAB ICD 2 headers.
29.10 PICkit 3 In-Circuit Debugger/
Programmer and
PICkit 3 Debug Express
The MPLAB PICkit 3 allows debugging and program-
ming of PIC® and dsPIC® Flash microcontrollers at a
most affordable price point using the powerful graphical
user interface of the MPLAB Integrated Development
Environment (IDE). The MPLAB PICkit 3 is connected
to the design engineer's PC using a full speed USB
interface and can be connected to the target via an
Microchip debug (RJ-11) connector (compatible with
MPLAB ICD 3 and MPLAB REAL ICE). The connector
uses two device I/O pins and the reset line to imple-
ment in-circuit debugging and In-Circuit Serial Pro-
gramming™.
The PICkit 3 Debug Express include the PICkit 3, demo
board and microcontroller, hookup cables and CDROM
with user’s guide, lessons, tutorial, compiler and
MPLAB IDE software.
PIC18F47J13 FAMILY
DS39974A-page 486 Preliminary 2010 Microchip Technology Inc.
29.11 PICkit 2 Development
Programmer/Debugger and
PICkit 2 Debug Express
The PICkit™ 2 Development Programmer/Debugger is
a low-cost development tool with an easy to use inter-
face for programming and debugging Microchip’s Flash
families of microcontrollers. The full featured
Windows® programming interface supports baseline
(PIC10F, PIC12F5xx, PIC16F5xx), midrange
(PIC12F6xx, PIC16F), PIC18F, PIC24, dsPIC30,
dsPIC33, and PIC32 families of 8-bit, 16-bit, and 32-bit
microcontrollers, and many Microchip Serial EEPROM
products. With Microchip’s powerful MPLAB Integrated
Development Environment (IDE) the PICkit™ 2
enables in-circuit debugging on most PIC® microcon-
trollers. In-Circuit-Debugging runs, halts and single
steps the program while the PIC microcontroller is
embedded in the application. When halted at a break-
point, the file registers can be examined and modified.
The PICkit 2 Debug Express include the PICkit 2, demo
board and microcontroller, hookup cables and CDROM
with user’s guide, lessons, tutorial, compiler and
MPLAB IDE software.
29.12 MPLAB PM3 Device Programmer
The MPLAB PM3 Device Programmer is a universal,
CE compliant device programmer with programmable
voltage verification at VDDMIN and VDDMAX for
maximum reliability. It features a large LCD display
(128 x 64) for menus and error messages and a modu-
lar, detachable socket assembly to support various
package types. The ICSP™ cable assembly is included
as a standard item. In Stand-Alone mode, the MPLAB
PM3 Device Programmer can read, verify and program
PIC devices without a PC connection. It can also set
code protection in this mode. The MPLAB PM3
connects to the host PC via an RS-232 or USB cable.
The MPLAB PM3 has high-speed communications and
optimized algorithms for quick programming of large
memory devices and incorporates an MMC card for file
storage and data applications.
29.13 Demonstration/Development
Boards, Evaluation Kits, and
Starter Kits
A wide variety of demonstration, development and
evaluation boards for various PIC MCUs and dsPIC
DSCs allows quick application development on fully func-
tional systems. Most boards include prototyping areas for
adding custom circuitry and provide application firmware
and source code for examination and modification.
The boards support a variety of features, including LEDs,
temperature sensors, switches, speakers, RS-232
interfaces, LCD displays, potentiometers and additional
EEPROM memory.
The demonstration and development boards can be
used in teaching environments, for prototyping custom
circuits and for learning about various microcontroller
applications.
In addition to the PICDEM™ and dsPICDEM™ demon-
stration/development board series of circuits, Microchip
has a line of evaluation kits and demonstration software
for analog filter design, KEELOQ® security ICs, CAN,
IrDA®, PowerSmart battery management, SEEVAL®
evaluation system, Sigma-Delta ADC, flow rate
sensing, plus many more.
Also available are starter kits that contain everything
needed to experience the specified device. This usually
includes a single application and debug capability, all
on one board.
Check the Microchip web page (www.microchip.com)
for the complete list of demonstration, development
and evaluation kits.
2010 Microchip Technology Inc. Preliminary DS39974A-page 487
PIC18F47J13 FAMILY
30.0 ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings(†)
Ambient temperature under bias.............................................................................................................-40°C to +125°C
Storage temperature .............................................................................................................................. -65°C to +150°C
Voltage on any digital only I/O pin or MCLR with respect to VSS (except VDD) ........................................... -0.3V to 6.0V
Voltage on any combined digital and analog pin with respect to VSS (except VDD)........................ -0.3V to (VDD + 0.3V)
Voltage on VDDCORE with respect to VSS................................................................................................... -0.3V to 2.75V
Voltage on VDD with respect to VSS ........................................................................................................... -0.3V to 4.0V
Total power dissipation (Note 1) ...............................................................................................................................1.0W
Maximum current out of VSS pin ...........................................................................................................................300 mA
Maximum current into VDD pin ..............................................................................................................................250 mA
Maximum output current sunk by any PORTB, PORTC and RA6 I/O pin...............................................................25mA
Maximum output current sunk by any PORTA (except RA6), PORTD and PORTE I/O pin......................................8 mA
Maximum output current sourced by any PORTB, PORTC and RA6 I/O pin .........................................................25 mA
Maximum output current sourced by any PORTA (except RA6), PORTD and PORTE I/O pin ................................8 mA
Maximum current sunk byall ports .......................................................................................................................200 mA
Maximum current sourced by all ports ..................................................................................................................200 mA
Note 1: Power dissipation is calculated as follows:
PDIS = VDD x {IDD – IOH} + {(VDD – VOH) x IOH} + (VOL x IOL)
† NOTICE: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the
device. This is a stress rating only and functional operation of the device at those or any other conditions above those
indicated in the operation listings of this specification is not implied. Exposure to maximum rating conditions for
extended periods may affect device reliability.
PIC18F47J13 FAMILY
DS39974A-page 488 Preliminary 2010 Microchip Technology Inc.
FIGURE 30-1: PIC18F47J13 FAMILY VDD FREQ U ENC Y GR AP H ( I ND US TR IA L )
FIGURE 30 - 2: PIC1 8LF 47J 13 FAMI L Y VDDCORE FREQUENCY GRAPH (INDUSTRIAL)(1)
0
Frequency
Voltage (VDD)
4.0V
2.15V
48 MHz
3.5V
3.0V
2.5V
3.6V
8 MHz
2.35V
Valid Operating Range
Frequency
Voltage (VDDCORE)
3.00V
2.00V
48 MHz
2.75V
2.50V
2.25V
2.75V
8 MHz
2.35V
Note 1: VDD and VDDCORE must be maintained so that VDDCORE VDD.
0
Valid Operating Range
2010 Microchip Technology Inc. Preliminary DS39974A-page 489
PIC18F47J13 FAMILY
30.1 DC Characteristics: Supply Voltage PIC18F47J13 Family (I ndustrial)
PIC18F47J 13 Fam ily Standard Operating Conditions (unless otherwise stated)
Operating temperature -40°C TA +85°C for industrial
Param
No. Symbol Characteristic Min Typ Max Units Conditions
D001 VDD Supply Voltage 2.15 — 3.6 V PIC18F4XJ13, PIC18F2XJ13
D001A VDD Supply Voltage 2.0 — 3.6 V PIC18LF4XJ13, PIC18LF2XJ13
D001B VDDCORE External Supply
for Microcontroller Core
2.0 — 2.75 V PIC18LF4XJ13, PIC18LF2XJ13
D001C AVDD Analog Supply Voltage VDD – 0.3 — VDD + 0.3 V
D001D AVSS Analog Ground Potential VSS – 0.3 — VSS + 0.3 V
D002 VDR RAM Data Retention
Voltage(1) 1.5 — — V
D003 VPOR VDD Start Voltage
to Ensure Internal
Power-on Reset Signal
— — 0.7 V See Section 5.3 “Power-on
Reset (POR)” for details
D004 SVDD VDD Rise Rate
to Ensure Internal
Power-on Reset Signal
0.05 — — V/ms See Section 5.3 “Power-on
Reset (POR)” for details
D005 VBOR VDDCORE Brown-out Reset
Voltage
— 2.0 2.15 V PIC18F4XJ13, PIC18F2XJ13
only
D006 VDSBOR VDD Brown-out Reset
Voltage
— 1.8 — V DSBOREN = 1 on “LF” device or
“F” device in Deep Sleep
Note 1: This is the limit to which VDDCORE can be lowered in Sleep mode, or during a device Reset, without losing RAM
data.
PIC18F47J13 FAMILY
DS39974A-page 490 Preliminary 2010 Microchip Technology Inc.
30.2 DC Characteristics: Power-Down and Supply Current
PIC18F47J13 Family (Industrial)
PIC18LF47J13 Family Standard Operating Co ndition s (u nless otherwise stated)
Operating temperature -40°C T
A +85°C for industrial
PIC18F47J13 Family Standard Operating Condition s (u nless othe rwise stated)
Operating temperature -40°C T
A +85°C for industrial
Param
No. Device Typ Max Units Conditions
Power-Down Current (IPD)(1) – Sleep mode
PIC18LFXXJ13 0.1 1.6 A -40°C
VDD = 2.0V,
VDDCORE = 2.0V
Sl eep mode,
REGSLP = 1
0.2 1.6 A +25°C
0.8 7.0 A +60°C
2.1 11.5 A +85°C
PIC18LFXXJ13 0.2 2.0 A -40°C
VDD = 2.5V,
VDDCORE = 2.5V
0.5 2.0 A +25°C
1.4 9.0 A +60°C
3.2 15.0 A +85°C
PIC18FXXJ13 3.0 6.0 A -40°C
VDD = 2.15V
VDDCORE = 10 F
Capacitor
3.8 6.0 A+25°C
4.7 9.0 A+60°C
6.4 18.5 A+85°C
PIC18FXXJ13 3.3 9.0 A -40°C
VDD = 3.3V
VDDCORE = 10 F
Capacitor
4.2 9.0 A+25°C
5.5 12.0 A+60°C
7.8 22.0 A+85°C
Power-Down Current (IPD)(1) – Deep Sleep mode
PIC18FXXJ13 225 nA -40°C
VDD = 2.15V,
VDDCORE = 10 F
Capacitor
Deep Sleep mode
9100 nA +25°C
72 250 nA +60°C
262 1000 nA +85°C
PIC18FXXJ13 17 50 nA -40°C
VDD = 3.3V,
VDDCORE = 10 F
Capacitor
53 150 nA +25°C
186 400 nA +60°C
503 2000 nA +85°C
Note 1: The power-down current in Sleep mode does not depend on the oscillator type. Power-down current is measured
with the part in Sleep mode, with all I/O pins in a high-impedance state and tied to VDD or VSS, and all features
that add delta current are disabled (such as WDT, Timer1 oscillator, BOR, etc.).
2: The supply current is mainly a function of operating voltage, frequency and mode. Other factors, such as
I/O pin loading and switching rate, oscillator type and circuit, internal code execution pattern and temperature,
also have an impact on the current consumption. All features that add delta current are disabled (such as WDT).
The test conditions for all IDD measurements in active operation mode are:
OSC1 = external square wave, from rail-to-rail; all I/O pins tri-stated, pulled to VDD/VSS;
MCLR = VDD; WDT disabled unless otherwise specified.
3: Low-power Timer1 with standard, low-cost 32 kHz crystals have an operating temperature range of -10°C to
+70°C. Extended temperature crystals are available at a much higher cost.
2010 Microchip Technology Inc. Preliminary DS39974A-page 491
PIC18F47J13 FAMILY
Supply Current (IDD)(2)
PIC18LFXXJ13 5.5 14.2 A -40°C
VDD = 2.0V,
VDDCORE = 2.0V
FOSC = 31 kHz
RC_RUN mode,
Internal RC Oscillator,
INTSRC = 0
5.8 14.2 A +25°C
7.9 19.0 A +85°C
PIC18LFXXJ13 8.4 16.5 A -40°C
VDD = 2.5V,
VDDCORE = 2.5V
8.5 16.5 A +25°C
11.3 25.0 A +85°C
PIC18FXXJ13 23.7 60.0 A-40°C VDD = 2.15V
VDDCORE = 10 F
Capacitor
27.8 60.0 A+25°C
34.0 70.0 A+85°C
PIC18FXXJ13 26.1 70.0 A-40°C VDD = 3.3V
VDDCORE = 10 F
Capacitor
29.6 70.0 A+25°C
36.2 96.0 A+85°C
PIC18LFXXJ13 0.87 1.5 mA -40°C
VDD = 2.0V,
VDDCORE = 2.0
FOSC = 4 MHz,
RC_RUN mode,
Internal RC Oscillator
0.91 1.5 mA +25°C
0.95 1.6 mA +85°C
PIC18LFXXJ13 1.23 2.0 mA -40°C
VDD = 2.5V,
VDDCORE = 2.5V
1.24 2.0 mA +25°C
1.25 2.0 mA +85°C
PIC18FXXJ13 0.99 2.4 mA -40°C VDD = 2.15V,
VDDCORE = 10 F
capacitor
1.02 2.4 mA +25°C
1.06 2.6 mA +85°C
PIC18FXXJ13 1.31 2.6 mA -40°C VDD = 3.3V,
VDDCORE = 10 F
capacitor
1.25 2.6 mA +25°C
1.26 2.7 mA +85°C
30.2 DC Characteristics: Power-Down and Supply Current
PIC18F47J13 Family (Industrial) (Continued)
PIC18LF47J13 Family Standard Operating Co ndition s (u nless othe rwise stated)
Operating temperature -40°C T
A +85°C for industrial
PIC18F47J13 Family Standard Operating Condition s (u nless otherwis e stated)
Operating temperature -40°C T
A +85°C for industrial
Param
No. Device Typ Max Units Conditions
Note 1: The power-down current in Sleep mode does not depend on the oscillator type. Power-down current is measured
with the part in Sleep mode, with all I/O pins in a high-impedance state and tied to VDD or VSS, and all features
that add delta current are disabled (such as WDT, Timer1 oscillator, BOR, etc.).
2: The supply current is mainly a function of operating voltage, frequency and mode. Other factors, such as
I/O pin loading and switching rate, oscillator type and circuit, internal code execution pattern and temperature,
also have an impact on the current consumption. All features that add delta current are disabled (such as WDT).
The test conditions for all IDD measurements in active operation mode are:
OSC1 = external square wave, from rail-to-rail; all I/O pins tri-stated, pulled to VDD/VSS;
MCLR = VDD; WDT disabled unless otherwise specified.
3: Low-power Timer1 with standard, low-cost 32 kHz crystals have an operating temperature range of -10°C to
+70°C. Extended temperature crystals are available at a much higher cost.
PIC18F47J13 FAMILY
DS39974A-page 492 Preliminary 2010 Microchip Technology Inc.
Supply Current (IDD)(2)
PIC18LFXXJ13 1.45 3.0 mA -40°C
VDD = 2.0V,
VDDCORE = 2.0V
FOSC = 8 MHz,
RC_RUN mode,
Internal RC Oscillator
1.48 3.0 mA +25°C
1.52 3.0 mA +85°C
PIC18LFXXJ13 2.12 3.8 mA -40°C
VDD = 2.5V,
VDDCORE = 2.5V
2.10 3.8 mA +25°C
2.10 3.9 mA +85°C
PIC18FXXJ13 1.65 3.6 mA -40°C
VDD = 2.15V,
VDDCORE = 10 F
1.68 3.6 mA +25°C
1.71 3.9 mA +85°C
PIC18FXXJ13 2.26 4.3 mA -40°C
VDD = 3.3V,
VDDCORE = 10 F
2.13 4.3 mA +25°C
2.10 4.6 mA +85°C
PIC18LFXXJ13 1.5 11 A -40°C
VDD = 2.0V,
VDDCORE = 2.0V
FOSC = 31 kHz,
RC_IDLE mode,
Internal RC Oscillator,
INTSRC = 0
1.7 11 A +25°C
3.9 20 A +85°C
PIC18LFXXJ13 2.0 12 A -40°C
VDD = 2.5V,
VDDCORE = 2.5V
2.4 13 A +25°C
5.4 23 A +85°C
PIC18FXXJ13 19.0 60 A-40°C
VDD = 2.15V,
VDDCORE = 10 F
23.2 60 A+25°C
29.9 75 A+85°C
PIC18FXXJ13 19.7 65 A-40°C
VDD = 3.3V,
VDDCORE = 10 F
24.0 65 A+25°C
31.4 90 A+85°C
30.2 DC Characteristics: Power-Down and Supply Current
PIC18F47J13 Family (Industrial) (Continued)
PIC18LF47J13 Family Standard Operating Co ndition s (u nless otherwise stated)
Operating temperature -40°C T
A +85°C for industrial
PIC18F47J13 Family Standard Operating Condition s (u nless othe rwise stated)
Operating temperature -40°C T
A +85°C for industrial
Param
No. Device Typ Max Units Conditions
Note 1: The power-down current in Sleep mode does not depend on the oscillator type. Power-down current is measured
with the part in Sleep mode, with all I/O pins in a high-impedance state and tied to VDD or VSS, and all features
that add delta current are disabled (such as WDT, Timer1 oscillator, BOR, etc.).
2: The supply current is mainly a function of operating voltage, frequency and mode. Other factors, such as
I/O pin loading and switching rate, oscillator type and circuit, internal code execution pattern and temperature,
also have an impact on the current consumption. All features that add delta current are disabled (such as WDT).
The test conditions for all IDD measurements in active operation mode are:
OSC1 = external square wave, from rail-to-rail; all I/O pins tri-stated, pulled to VDD/VSS;
MCLR = VDD; WDT disabled unless otherwise specified.
3: Low-power Timer1 with standard, low-cost 32 kHz crystals have an operating temperature range of -10°C to
+70°C. Extended temperature crystals are available at a much higher cost.
2010 Microchip Technology Inc. Preliminary DS39974A-page 493
PIC18F47J13 FAMILY
Supply Current (IDD)(2)
PIC18LFXXJ13 0.41 0.98 mA -40°C
VDD = 2.0V,
VDDCORE = 2.0V
FOSC = 4 MHz,
RC_IDLE mode,
Internal RC Oscillator
0.44 0.98 mA +25°C
0.48 1.12 mA +85°C
PIC18LFXXJ13 0.48 1.14 mA -40°C
VDD = 2.5V,
VDDCORE = 2.5V
0.51 1.14 mA +25°C
0.55 1.25 mA +85°C
PIC18FXXJ13 0.45 1.21 mA -40°C
VDD = 2.15V,
VDDCORE = 10 F
0.49 1.21 mA +25°C
0.52 1.30 mA +85°C
PIC18FXXJ13 0.52 1.20 mA -40°C
VDD = 3.3V,
VDDCORE = 10 F
0.54 1.20 mA +25°C
0.58 1.35 mA +85°C
PIC18LFXXJ13 0.53 1.4 mA -40°C
VDD = 2.0V,
VDDCORE = 2.0V
FOSC = 8 MHz,
RC_IDLE mode,
Internal RC Oscillator
0.56 1.5 mA +25°C
0.60 1.6 mA +85°C
PIC18LFXXJ13 0.63 2.0 mA -40°C
VDD = 2.5V,
VDDCORE = 2.5V
0.67 2.0 mA +25°C
0.72 2.2 mA +85°C
PIC18FXXJ13 0.58 1.8 mA -40°C
VDD = 2.15V,
VDDCORE = 10 F
0.62 1.8 mA +25°C
0.66 2.0 mA +85°C
PIC18FXXJ13 0.69 2.2 mA -40°C
VDD = 3.3V,
VDDCORE = 10 F
0.70 2.2 mA +25°C
0.74 2.3 mA +85°C
30.2 DC Characteristics: Power-Down and Supply Current
PIC18F47J13 Family (Industrial) (Continued)
PIC18LF47J13 Family Standard Operating Co ndition s (u nless othe rwise stated)
Operating temperature -40°C T
A +85°C for industrial
PIC18F47J13 Family Standard Operating Condition s (u nless otherwis e stated)
Operating temperature -40°C T
A +85°C for industrial
Param
No. Device Typ Max Units Conditions
Note 1: The power-down current in Sleep mode does not depend on the oscillator type. Power-down current is measured
with the part in Sleep mode, with all I/O pins in a high-impedance state and tied to VDD or VSS, and all features
that add delta current are disabled (such as WDT, Timer1 oscillator, BOR, etc.).
2: The supply current is mainly a function of operating voltage, frequency and mode. Other factors, such as
I/O pin loading and switching rate, oscillator type and circuit, internal code execution pattern and temperature,
also have an impact on the current consumption. All features that add delta current are disabled (such as WDT).
The test conditions for all IDD measurements in active operation mode are:
OSC1 = external square wave, from rail-to-rail; all I/O pins tri-stated, pulled to VDD/VSS;
MCLR = VDD; WDT disabled unless otherwise specified.
3: Low-power Timer1 with standard, low-cost 32 kHz crystals have an operating temperature range of -10°C to
+70°C. Extended temperature crystals are available at a much higher cost.
PIC18F47J13 FAMILY
DS39974A-page 494 Preliminary 2010 Microchip Technology Inc.
Supply Current (IDD)(2)
PIC18LFXXJ13 0.61 1.25 mA -40°C
VDD = 2.0V,
VDDCORE = 2.0V
FOSC = 4 MHz,
PRI_RUN mode,
EC Oscillator
0.62 1.25 mA +25°C
0.64 1.35 mA +85°C
PIC18LFXXJ13 0.99 1.70 mA -40°C
VDD = 2.5V,
VDDCORE = 2.5V
0.96 1.70 mA +25°C
0.94 1.82 mA +85°C
PIC18FXXJ13 0.78 1.60 mA -40°C
VDD = 2.15V,
VDDCORE = 10 F
0.78 1.60 mA +25°C
0.78 1.70 mA +85°C
PIC18FXXJ13 1.10 1.95 mA -40°C
VDD = 3.3V,
VDDCORE = 10 F
1.02 1.90 mA +25°C
1.00 2.00 mA +85°C
PIC18LFXXJ13 9.8 14.8 mA -40°C
VDD = 2.5V,
VDDCORE = 2.5V FOSC = 48 MHz,
PRI_RUN mode,
EC Oscillator
9.5 14.8 mA +25°C
9.4 15.1 mA +85°C
PIC18FXXJ13 10.9 19.5 mA -40°C
VDD = 3.3V,
VDDCORE = 10 F
10.2 19.5 mA +25°C
9.9 19.5 mA +85°C
30.2 DC Characteristics: Power-Down and Supply Current
PIC18F47J13 Family (Industrial) (Continued)
PIC18LF47J13 Family Standard Operating Co ndition s (u nless otherwise stated)
Operating temperature -40°C T
A +85°C for industrial
PIC18F47J13 Family Standard Operating Condition s (u nless othe rwise stated)
Operating temperature -40°C T
A +85°C for industrial
Param
No. Device Typ Max Units Conditions
Note 1: The power-down current in Sleep mode does not depend on the oscillator type. Power-down current is measured
with the part in Sleep mode, with all I/O pins in a high-impedance state and tied to VDD or VSS, and all features
that add delta current are disabled (such as WDT, Timer1 oscillator, BOR, etc.).
2: The supply current is mainly a function of operating voltage, frequency and mode. Other factors, such as
I/O pin loading and switching rate, oscillator type and circuit, internal code execution pattern and temperature,
also have an impact on the current consumption. All features that add delta current are disabled (such as WDT).
The test conditions for all IDD measurements in active operation mode are:
OSC1 = external square wave, from rail-to-rail; all I/O pins tri-stated, pulled to VDD/VSS;
MCLR = VDD; WDT disabled unless otherwise specified.
3: Low-power Timer1 with standard, low-cost 32 kHz crystals have an operating temperature range of -10°C to
+70°C. Extended temperature crystals are available at a much higher cost.
2010 Microchip Technology Inc. Preliminary DS39974A-page 495
PIC18F47J13 FAMILY
PIC18LFXXJ13 0.18 0.70 mA -40°C
VDD = 2.0V,
VDDCORE = 2.0V
FOSC = 4 MHz,
PRI_IDLE mode,
EC Oscillator
0.18 0.70 mA +25°C
0.19 0.75 mA +85°C
PIC18LFXXJ13 0.23 0.90 mA -40°C
VDD = 2.5V,
VDDCORE = 2.5V
0.23 0.90 mA +25°C
0.24 1.00 mA +85°C
PIC18FXXJ13 0.23 0.80 A-40°C VDD = 2.15V,
VDDCORE = 10 F
Capacitor
0.24 0.80 A+25°C
0.25 0.85 A+85°C
PIC18FXXJ13 0.32 1.00 A-40°C VDD = 3.3V,
VDDCORE = 10 F
Capacitor
0.31 1.00 A+25°C
0.32 1.00 A+85°C
PIC18LFXXJ13 2.74 7.00 mA -40°C
VDD = 2.5V,
VDDCORE = 2.5V FOSC = 48 MHz,
PRI_IDLE mode,
EC Oscillator
2.77 6.50 mA +25°C
2.80 6.50 mA +85°C
PIC18FXXJ13 3.48 11.00 mA -40°C VDD = 3.3V,
VDDCORE = 10 F
Capacitor
3.48 10.00 mA +25°C
3.44 10.00 mA +85°C
30.2 DC Characteristics: Power-Down and Supply Current
PIC18F47J13 Family (Industrial) (Continued)
PIC18LF47J13 Family Standard Operating Co ndition s (u nless othe rwise stated)
Operating temperature -40°C T
A +85°C for industrial
PIC18F47J13 Family Standard Operating Condition s (u nless otherwis e stated)
Operating temperature -40°C T
A +85°C for industrial
Param
No. Device Typ Max Units Conditions
Note 1: The power-down current in Sleep mode does not depend on the oscillator type. Power-down current is measured
with the part in Sleep mode, with all I/O pins in a high-impedance state and tied to VDD or VSS, and all features
that add delta current are disabled (such as WDT, Timer1 oscillator, BOR, etc.).
2: The supply current is mainly a function of operating voltage, frequency and mode. Other factors, such as
I/O pin loading and switching rate, oscillator type and circuit, internal code execution pattern and temperature,
also have an impact on the current consumption. All features that add delta current are disabled (such as WDT).
The test conditions for all IDD measurements in active operation mode are:
OSC1 = external square wave, from rail-to-rail; all I/O pins tri-stated, pulled to VDD/VSS;
MCLR = VDD; WDT disabled unless otherwise specified.
3: Low-power Timer1 with standard, low-cost 32 kHz crystals have an operating temperature range of -10°C to
+70°C. Extended temperature crystals are available at a much higher cost.
PIC18F47J13 FAMILY
DS39974A-page 496 Preliminary 2010 Microchip Technology Inc.
PIC18LFXXJ13 4.1 6.5 mA -40°C
VDD = 2.5V,
VDDCORE = 2.5V FOSC = 16 MHz,
PRI_RUN mode,
4 MHz Internal
Oscillator with PLL
4.0 6.4 mA +25°C
4.0 6.4 mA +85°C
PIC18FXXJ13 4.5 7.5 mA -40°C
VDD = 3.3V,
VDDCORE = 10 F
4.2 7.4 mA +25°C
4.1 7.4 mA +85°C
PIC18LFXXJ13 7.8 12.0 mA -40°C
VDD = 2.5V,
VDDCORE = 2.5V FOSC = 32 MHz,
PRI_RUN mode,
8 MHz Internal
Oscillator with PLL
7.7 11.8 mA +25°C
7.5 11.8 mA +85°C
PIC18FXXJ13 8.6 17.5 mA -40°C
VDD = 3.3V,
VDDCORE = 10 F
7.8 17.2 mA +25°C
7.5 17.2 mA +85°C
PIC18LFXXJ13 9.4 14.0 mA -40°C
VDD = 2.5V,
VDDCORE = 2.5V FOSC = 48 MHz,
PRI_RUN mode,
12 MHz External
Oscillator with PLL
9.3 14.0 mA +25°C
9.1 14.0 mA +85°C
PIC18FXXJ13 11.1 21.5 mA -40°C
VDD = 3.3V,
VDDCORE = 10 F
10.3 20.5 mA +25°C
9.9 20.5 mA +85°C
30.2 DC Characteristics: Power-Down and Supply Current
PIC18F47J13 Family (Industrial) (Continued)
PIC18LF47J13 Family Standard Operating Co ndition s (u nless otherwise stated)
Operating temperature -40°C T
A +85°C for industrial
PIC18F47J13 Family Standard Operating Condition s (u nless othe rwise stated)
Operating temperature -40°C T
A +85°C for industrial
Param
No. Device Typ Max Units Conditions
Note 1: The power-down current in Sleep mode does not depend on the oscillator type. Power-down current is measured
with the part in Sleep mode, with all I/O pins in a high-impedance state and tied to VDD or VSS, and all features
that add delta current are disabled (such as WDT, Timer1 oscillator, BOR, etc.).
2: The supply current is mainly a function of operating voltage, frequency and mode. Other factors, such as
I/O pin loading and switching rate, oscillator type and circuit, internal code execution pattern and temperature,
also have an impact on the current consumption. All features that add delta current are disabled (such as WDT).
The test conditions for all IDD measurements in active operation mode are:
OSC1 = external square wave, from rail-to-rail; all I/O pins tri-stated, pulled to VDD/VSS;
MCLR = VDD; WDT disabled unless otherwise specified.
3: Low-power Timer1 with standard, low-cost 32 kHz crystals have an operating temperature range of -10°C to
+70°C. Extended temperature crystals are available at a much higher cost.
2010 Microchip Technology Inc. Preliminary DS39974A-page 497
PIC18F47J13 FAMILY
PIC18LFXXJ13 9 45 A -40°C
VDD = 2.5V,
VDDCORE = 2.5V
FOSC = 32 kHz(3),
SEC_RUN mode,
SOSCSEL = 0b01
945A +25°C
12 61 A +85°C
PIC18FXXJ13 24 95 A-40°C
VDD = 2.15V,
VDDCORE = 10 F
28 95 A+25°C
35 105 A+85°C
PIC18FXXJ13 27 110 A-40°C
VDD = 3.3V,
VDDCORE = 10 F
31 110 A+25°C
35 150 A+85°C
PIC18LFXXJ13 2.5 31 A -40°C
VDD = 2.5V,
VDDCORE = 2.5V
FOSC = 32 kHz(3),
SEC_IDLE mode,
SOSCSEL = 0b01
3.0 31 A +25°C
6.1 50 A +85°C
PIC18FXXJ13 19 87 A-40°C
VDD = 2.15V,
VDDCORE = 10 F
24 89 A+25°C
31 97 A+85°C
PIC18FXXJ13 21 100 A-40°C
VDD = 3.3V,
VDDCORE = 10 F
25 100 A+25°C
31 140 A+85°C
30.2 DC Characteristics: Power-Down and Supply Current
PIC18F47J13 Family (Industrial) (Continued)
PIC18LF47J13 Family Standard Operating Co ndition s (u nless othe rwise stated)
Operating temperature -40°C T
A +85°C for industrial
PIC18F47J13 Family Standard Operating Condition s (u nless otherwis e stated)
Operating temperature -40°C T
A +85°C for industrial
Param
No. Device Typ Max Units Conditions
Note 1: The power-down current in Sleep mode does not depend on the oscillator type. Power-down current is measured
with the part in Sleep mode, with all I/O pins in a high-impedance state and tied to VDD or VSS, and all features
that add delta current are disabled (such as WDT, Timer1 oscillator, BOR, etc.).
2: The supply current is mainly a function of operating voltage, frequency and mode. Other factors, such as
I/O pin loading and switching rate, oscillator type and circuit, internal code execution pattern and temperature,
also have an impact on the current consumption. All features that add delta current are disabled (such as WDT).
The test conditions for all IDD measurements in active operation mode are:
OSC1 = external square wave, from rail-to-rail; all I/O pins tri-stated, pulled to VDD/VSS;
MCLR = VDD; WDT disabled unless otherwise specified.
3: Low-power Timer1 with standard, low-cost 32 kHz crystals have an operating temperature range of -10°C to
+70°C. Extended temperature crystals are available at a much higher cost.
PIC18F47J13 FAMILY
DS39974A-page 498 Preliminary 2010 Microchip Technology Inc.
D022
(IWDT)
Modul e Di ffer ential Cur rents (IWDT, IHLVD, IOSCB, IAD)
W atchdog Timer 0.38 4.0 A -40°C VDD = 2.5V,
VDDCORE = 2.5V PIC18LFXXJ13
0.41 4.0 A +25°C
0.44 5.2 A +85°C
0.33 4.0 A-40°C VDD = 2.15V,
VDDCORE = 10 F
Capacitor PIC18FXXJ13
0.33 4.0 A+25°C
0.39 6.0 A+85°C
0.49 8.0 A-40°C VDD = 3.3V,
VDDCORE = 10 F
Capacitor
0.48 8.0 A+25°C
0.45 9.0 A+85°C
D022B
(IHLVD)
High/Lo w -Vo ltage Detect 4.1 8.0 A -40°C VDD = 2.5V,
VDDCORE = 2.5V PIC18LFXXJ13
4.9 8.0 A +25°C
5.8 9.0 A +85°C
2.6 6.0 A-40°C VDD = 2.15V,
VDDCORE = 10 F
Capacitor PIC18FXXJ13
3.0 6.0 A+25°C
3.5 8.0 A+85°C
3.4 9.0 A-40°C VDD = 3.3V,
VDDCORE = 10 F
Capacitor
3.9 9.0 A+25°C
4.2 12 A+85°C
D025
(IOSCB)
Real-Time Clock/Calendar
with Low-Power Timer1
Oscillator
0.5 4.5 A-40°C VDD = 2.15V,
VDDCORE = 10 F
Capacitor
PIC18FXXJ13
32.768 kHz(3), T1OSCEN = 1,
SOSCSEL = 0b01
0.7 5.0 A+25°C
0.8 5.0 A+60°C
0.9 5.0 A+85°C
0.6 4.0 A-40°C VDD = 2.5V,
VDDCORE = 10 F
Capacitor
0.8 4.5 A+25°C
0.9 4.5 A+60°C
1.0 4.5 A+85°C
0.8 6.5 A-40°C VDD = 3.3V,
VDDCORE = 10 F
Capacitor
1.0 6.5 A+25°C
1.1 8.0 A+60°C
1.3 8.0 A+85°C
30.2 DC Characteristics: Power-Down and Supply Current
PIC18F47J13 Family (Industrial) (Continued)
PIC18LF47J13 Family Standard Operating Co ndition s (u nless otherwise stated)
Operating temperature -40°C T
A +85°C for industrial
PIC18F47J13 Family Standard Operating Condition s (u nless othe rwise stated)
Operating temperature -40°C T
A +85°C for industrial
Param
No. Device Typ Max Units Conditions
Note 1: The power-down current in Sleep mode does not depend on the oscillator type. Power-down current is measured
with the part in Sleep mode, with all I/O pins in a high-impedance state and tied to VDD or VSS, and all features
that add delta current are disabled (such as WDT, Timer1 oscillator, BOR, etc.).
2: The supply current is mainly a function of operating voltage, frequency and mode. Other factors, such as
I/O pin loading and switching rate, oscillator type and circuit, internal code execution pattern and temperature,
also have an impact on the current consumption. All features that add delta current are disabled (such as WDT).
The test conditions for all IDD measurements in active operation mode are:
OSC1 = external square wave, from rail-to-rail; all I/O pins tri-stated, pulled to VDD/VSS;
MCLR = VDD; WDT disabled unless otherwise specified.
3: Low-power Timer1 with standard, low-cost 32 kHz crystals have an operating temperature range of -10°C to
+70°C. Extended temperature crystals are available at a much higher cost.
2010 Microchip Technology Inc. Preliminary DS39974A-page 499
PIC18F47J13 FAMILY
D026
(IAD)
Modul e Di ffer ential Cur rents (IWDT, IHLVD, IOSCB, IAD)
A/D Converter 0.5 4 A -40°C VDD = 2.5V,
VDDCORE = 2.5V
PIC18LFXXJ13
A/D on, not converting
0.5 4 A +25°C
0.5 4 A +85°C
1.1 5A -40°C VDD = 2.15V,
VDDCORE = 10 F
Capacitor PIC18FXXJ13
A/D on, not converting
1.1 5A+25°C
1.1 5A+85°C
3.2 11 A -40°C VDD = 3.3V,
VDDCORE = 10 F
Capacitor
3.2 11 A+25°C
3.2 11 A+85°C
30.2 DC Characteristics: Power-Down and Supply Current
PIC18F47J13 Family (Industrial) (Continued)
PIC18LF47J13 Family Standard Operating Co ndition s (u nless othe rwise stated)
Operating temperature -40°C T
A +85°C for industrial
PIC18F47J13 Family Standard Operating Condition s (u nless otherwis e stated)
Operating temperature -40°C T
A +85°C for industrial
Param
No. Device Typ Max Units Conditions
Note 1: The power-down current in Sleep mode does not depend on the oscillator type. Power-down current is measured
with the part in Sleep mode, with all I/O pins in a high-impedance state and tied to VDD or VSS, and all features
that add delta current are disabled (such as WDT, Timer1 oscillator, BOR, etc.).
2: The supply current is mainly a function of operating voltage, frequency and mode. Other factors, such as
I/O pin loading and switching rate, oscillator type and circuit, internal code execution pattern and temperature,
also have an impact on the current consumption. All features that add delta current are disabled (such as WDT).
The test conditions for all IDD measurements in active operation mode are:
OSC1 = external square wave, from rail-to-rail; all I/O pins tri-stated, pulled to VDD/VSS;
MCLR = VDD; WDT disabled unless otherwise specified.
3: Low-power Timer1 with standard, low-cost 32 kHz crystals have an operating temperature range of -10°C to
+70°C. Extended temperature crystals are available at a much higher cost.
PIC18F47J13 FAMILY
DS39974A-page 500 Preliminary 2010 Microchip Technology Inc.
30.3 DC Characteristi cs: PIC18F47J13 Family (Industrial)
DC CHARACTERISTICS Standard Operating Conditions (unless otherwise stated)
Operating temperature -40°C TA +85°C for industrial
Param
No. Symbol Characteristic Min Max Units Conditions
VIL Input Low Voltage
All I/O Ports:
D030 with TTL Buffer VSS 0.15 VDD VVDD < 3.3V
D030A with TTL Buffer VSS 0.8 V 3.3V < VDD <3.6V
D031 with Schmitt Trigger Buffer VSS 0.2 VDD V
D031A SCLx/SDAx — 0.3 VDD VI
2C™ enabled
D031B SCLx/SDAx — 0.8 V SMBus enabled
D032 MCLR VSS 0.2 VDD V
D033 OSC1 VSS 0.3 VDD V HS, HSPLL modes
D033A
D034
OSC1
T1OSI
VSS
VSS
0.2 VDD
0.3
V
V
EC, ECPLL modes
T1OSCEN = 1
VIH Input High Voltage
I/O Ports without 5.5V
Toler an c e:
D040 with TTL Buffer 0.25 VDD + 0.8V VDD VVDD < 3.3V
D040A with TTL Buffer 2.0 VDD V3.3V < VDD <3.6V
D041 with Schmitt Trigger Buffer 0.8 VDD VDD V
I/O Ports with 5.5V Tolerance:(4)
Dxxx with TTL Buffer 0.25 VDD + 0.8V 5.5 V VDD < 3.3V
DxxxA 2.0 5.5 V 3.3V VDD 3.6V
Dxxx with Schmitt Trigger Buffer 0.8 VDD 5.5 V
D041A SCLx/SDAx 0.7 VDD —VI
2C™ enabled
D041B SCLx/SDAx 2.1 — V SMBus enabled; VDD > 3V
D042 MCLR 0.8 VDD 5.5 V
D043 OSC1 0.7 VDD VDD V HS, HSPLL modes
D043A
D044
OSC1
T1OSI
0.8 VDD
1.6
VDD
VDD
V
V
EC, ECPLL modes
T1OSCEN = 1
IPU Weak Pull-up Current
D070 IPURB PORTB, PORTD(3) and
PORTE(3) Weak Pull-up Current
80 400 AV
DD = 3.3V, VPIN = VSS
Note 1: The leakage current on the MCLR pin is strongly dependent on the applied voltage level. The specified
levels represent normal operating conditions. Higher leakage current may be measured at different input
voltages.
2: Negative current is defined as current sourced by the pin.
3: Only available in 44-pin devices.
4: Refer to Table 10-2 for pin tolerance levels.
2010 Microchip Technology Inc. Preliminary DS39974A-page 501
PIC18F47J13 FAMILY
VOL Output Low Voltage
D080 I/O Ports:
PORTA (except RA6),
PORTD(3), PORTE(3)
—0.4VI
OL = 4 mA, VDD = 3.3V,
-40C to +85C
PORTB, PORTC, RA6 — 0.4 V IOL = 8.5 mA, VDD = 3.3V,
-40C to +85C
VOH Output High Voltage
D090 I/O Ports: V
PORTA (except RA6),
PORTD(3), PORTE(3)
2.4 — V IOH = -3 mA, VDD = 3.3V,
-40C to +85C
PORTB, PORTC, RA6 2.4 — V IOH = -6 mA, VDD = 3.3V,
-40C to +85C
Capacitive Loading Specs
on Output Pins
D101 CIO All I/O Pins and OSC2 — 50 pF To meet the AC Timing
Specifications
D102 CBSCLx, SDAx — 400 pF I2C™ Specification
30.3 DC Characteristi cs: PIC18F47J13 Family (Industrial) (Continued)
DC CHARACTERISTICS Standard Operating Conditions (unless otherwise stated)
Operating temperature -40°C TA +85°C for industrial
Param
No. Symbol Characteristic Min Max Units Conditions
Note 1: The leakage current on the MCLR pin is strongly dependent on the applied voltage level. The specified
levels represent normal operating conditions. Higher leakage current may be measured at different input
voltages.
2: Negative current is defined as current sourced by the pin.
3: Only available in 44-pin devices.
4: Refer to Table 10-2 for pin tolerance levels.
PIC18F47J13 FAMILY
DS39974A-page 502 Preliminary 2010 Microchip Technology Inc.
TABLE 30-1: MEMORY PROGRAMMING REQUIREMENTS
30.4 DC Characteristi cs: PIC18F47J13 Family (Industrial)
DC CHARACTERISTICS Standard Operating Conditions (unless otherwise stated)
Operating temperature -40°C TA +85°C for industrial
Param
No. Symbol Characteristic Typ Max Units Conditions
IIL Input Leakage Current (1,2)
D060 I/O Ports without 5.5V Tolerance ±5 ±200 nA VSS VPIN VDD,
Pin at high-impedance
I/O Ports with 5.5V Tolerance ±5 ±200 nA VSS VPIN 5.5V,
Pin at high-impedance
D061 MCLR ±5 ±200 nA Vss VPIN VDD
D063 OSC1 ±5 ±200 nA Vss VPIN VDD
Note 1: The leakage current on the MCLR pin is strongly dependent on the applied voltage level. The specified
levels represent normal operating conditions. Higher leakage current may be measured at different input
voltages.
2: Negative current is defined as current sourced by the pin.
DC CHARACTERISTICS Standard Operating Conditions (unless otherwise stated)
Operating temperature -40°C TA +85°C for industrial
Param
No. Sym Characteristic Min Typ† Max Units Conditions
Program Flash Memory
D130 EPCell Endurance 10K — — E/W -40C to +85C
D131 VPR VDDcore for Read VMIN —2.75VVMIN = Minimum operating
voltage
D132B VPEW VDDCORE for Self-Timed Erase or
Write
2.25 — 2.75 V
D133A TIW Self-Timed Write Cycle Time — 2.8 — ms 64 bytes
D133B TIE Self-Timed Block Erase Cycle
Time
—33.0—ms
D134 TRETD Characteristic Retention 20 — — Year Provided no other
specifications are violated
D135 IDDP Supply Current during
Programming
—3—mA
† Data in “Typ” column is at 3.3V, 25°C unless otherwise stated.
2010 Microchip Technology Inc. Preliminary DS39974A-page 503
PIC18F47J13 FAMILY
TABLE 30-2: COMPARATOR SPECIFICATIONS
TABLE 30-3: VOLTAGE REFERENCE SPECIFICATIONS
TABLE 30-4: INTERNAL VOLTAGE REGULATOR SPECIFICATIONS
Operating Conditions: 3.0V < VDD < 3.6V, -40°C < TA < +85°C (unless otherwise stated)
Param
No. Sym Characteristics Min Typ Max Units Comments
D300 VIOFF Input Offset Voltage — +5+25 mV
D301 VICM Input Common Mode Voltage 0 — VDD V
VIRV Internal Reference Voltage 0.57 0.60 0.63 V
D302 CMRR Common Mode Rejection Ratio 55 — — dB
D303 TRESP Response Time(1) —150400 ns
D304 TMC2OV Comparator Mode Change to
Output Valid
—— 10 s
Note 1: Response time measured with one comparator input at VDD/2, while the other input transitions from VSS
to VDD.
Operating Condit ions : 3.0V < VDD < 3.6V, -40°C < TA < +85°C (unless otherwise stated)
Param
No. Sym Characteristics Min Typ Max Units Comments
D310 VRES Resolution VDD/24 — VDD/32 LSb
D311 VRAA Absolute Accuracy — — 1/2 LSb
D312 VRUR Unit Resistor Value (R) — 2k —
310 TSET Settling Time(1) — — 10 s
Note 1: Settling time measured while CVRR = 1 and CVR<3:0> bits transition from ‘0000’ to ‘1111’.
Operating Condit ions : -40°C < T
A < +85°C (unless otherwise stated)
Param
No. Sym Characteristics Min Typ Max Units Comments
VRGOUT Regulator Output Voltage 2.35 2.5 2.7 V Regulator enabled, VDD = 3.0V
CEFC External Filter Capacitor
Value(1) 5.4 10 18 F ESR < 3 recommended
ESR < 5 required
Note 1: CEFC applies for PIC18F devices in the family. For PIC18LF devices in the family, there is no specific
minimum or maximum capacitance for VDDCORE, although proper supply rail bypassing should still be
used.
PIC18F47J13 FAMILY
DS39974A-page 504 Preliminary 2010 Microchip Technology Inc.
TABLE 30-5: ULPWU SPECIFICATIONS
TABLE 30-6: CTMU CURRENT SOURCE SPECIFICATIONS
DC CHARACTERISTICS S tandard Operating Conditions (unless othe rwis e stated)
Operating temperature -40°C TA +85°C for industrial
Param
No. Sym Characteristic Min Typ† Max Units Conditions
D100 IULP Ultra Low-Power Wake-up
Current — 60 — nA Net of I/O leakage and current
sink at 1.6V on pin,
VDD = 3.3V
See Application Note AN879,
“Using the Microchip Ultra
Low-Power Wake-up Module”
(DS00879)
† Data in “Typ” column is at 3.3V, 25°C unless otherwise stated.
DC CHARACTERISTICS Stan dard Oper ati ng Condit ions: 2.0 V to 3.6V (u nless ot herwise stated)
Operating temperature -40°C TA +85°C for Industrial
Param
No. Sym Characteristic Min Typ(1) Max Units Conditions
IOUT1 CTMU Current Source, Base Range — 550 — nA CTMUICON<1:0> = 01
IOUT2 CTMU Current Source, 10x Range — 5.5 — A CTMUICON<1:0> = 10
IOUT3 CTMU Current Source, 100x Range — 55 — A CTMUICON<1:0> = 11
Note 1: Nominal value at center point of current trim range (CTMUICON<7:2> = 000000).
2010 Microchip Technology Inc. Preliminary DS39974A-page 505
PIC18F47J13 FAMILY
FIGURE 30-3: HIGH/LOW-VOLTAGE DETECT CHARACTERISTICS
TABLE 30-7: HIGH/LOW-VOLTAGE DETECT CHARACTERISTICS
Standard Operating Conditions (unless otherwise stated)
Operating temperature -40°C TA +85°C for industrial
Param
No. Symbol Characteristic Min Typ Max Units Conditions
D420 HLVD Voltage on VDD
Transition High-to-Low
HLVDL<3:0> = 1000 2.33 2.45 2.57 V
HLVDL<3:0> = 1001 2.47 2.60 2.73 V
HLVDL<3:0> = 1010 2.66 2.80 2.94 V
HLVDL<3:0> = 1011 2.76 2.90 3.05 V
HLVDL<3:0> = 1100 2.85 3.00 3.15 V
HLVDL<3:0> = 1101 2.97 3.13 3.29 V
HLVDL<3:0> = 1110 3.23 3.40 3.57 V
D421 TIRVST Time for Internal Reference Voltage to
become Stable
—50—s
D422 TLVD High/Low-Voltage Detect Pulse Width 200 — — s
VHLVD
HLVDIF
VDD
(HLVDIF set by hardware) (HLVDIF can be
cleared in software)
VHLVD
For VDIRMAG = 1:
For VDIRMAG = 0:VDD
PIC18F47J13 FAMILY
DS39974A-page 506 Preliminary 2010 Microchip Technology Inc.
30.5 AC (Timing) Characteri stics
30.5.1 TIMING PARAMETER SYMBOLOGY
The timing parameter symbols have been created
following one of the following formats:
1. TppS2ppS 3. TCC:ST (I2C specifications only)
2. TppS 4. Ts (I2C specifications only)
T
F Frequency T Time
Lowercase letters (pp) and their meanings:
pp
cc CCP1 osc OSC1
ck CLKO rd RD
cs CS rw RD or WR
di SDI sc SCK
do SDO ss SS
dt Data in t0 T0CKI
io I/O port t1 T13CKI
mc MCLR wr WR
Uppercase letters and their meanings:
S
F Fall P Period
HHigh RRise
I Invalid (High-impedance) V Valid
L Low Z High-impedance
I2C only
AA output access High High
BUF Bus free Low Low
T
CC:ST (I2C specifications only)
CC
HD Hold SU Setup
ST
DAT DATA input hold STO Stop condition
STA Start condition
2010 Microchip Technology Inc. Preliminary DS39974A-page 507
PIC18F47J13 FAMILY
30.5.2 TIMING CONDITIONS
The temperature and voltages specified in Table 30-8
apply to all timing specifications unless otherwise
noted. Figure 30-4 specifies the load conditions for the
timing specifications.
TABLE 30-8: TEMPERATURE AND VOLTAGE SPECIFICATIONS – AC
FIGU RE 30-4: LOAD C O ND ITI O NS FO R D EVI CE T I MIN G SPECIFIC ATI O NS
AC CHARACTERISTICS St anda rd Opera ting Conditi ons (unle ss otherw is e stated)
Operating temperature -40°C TA +85°C for industrial
Operating voltage VDD range as described in Section 30.1 and Section 30.3.
VDD/2
CL
RL
Pin
Pin
VSS
VSS
CL
RL=464
CL= 50 pF for all pins except OSC2/CLKO/RA6
and including D and E outputs as ports
CL= 15 pF for OSC2/CLKO/RA6
Load Condition 1 Load Condition 2
PIC18F47J13 FAMILY
DS39974A-page 508 Preliminary 2010 Microchip Technology Inc.
30.5.3 TIMING DIAGRAMS AND SPECIFICATIONS
FIGU RE 30-5: EXT ER NA L C LO C K T I MI NG
TABLE 30-9: EXTERNAL CLOCK TIMING REQUIREMENTS
Param.
No. Symbol Characteristic Min Max Units Conditions
1A FOSC External CLKI Frequency(1) DC 48 MHz EC Oscillator mode
DC 48 ECPLL Oscillator mode(2)
Oscillator Frequency(1) 4 16 MHz HS Oscillator mode
416
(4) HSPLL Oscillator mode(3)
1TOSC External CLKI Period(1) 20.8 — ns EC Oscillator mode
20.8 — ECPLL Oscillator mode(2)
Oscillator Period(1) 62.5 250 ns HS Oscillator mode
62.5(4) 250 HSPLL Oscillator mode(3)
2TCY Instruction Cycle Time(1) 83.3 DC ns TCY = 4/FOSC, Industrial
3TOSL,
TOSH
External Clock in (OSC1)
High or Low Time
10 — ns EC Oscillator mode
4TOSR,
TOSF
External Clock in (OSC1)
Rise or Fall Time
— 7.5 ns EC Oscillator mode
Note 1: Instruction cycle period (TCY) equals four times the input oscillator time base period for all configurations
except PLL. All specified values are based on characterization data for that particular oscillator type under
standard operating conditions with the device executing code. Exceeding these specified limits may result
in an unstable oscillator operation and/or higher than expected current consumption. All devices are tested
to operate at “min.” values with an external clock applied to the OSC1/CLKI pin. When an external clock
input is used, the “max.” cycle time limit is “DC” (no clock) for all devices.
2: In order to use the PLL, the external clock frequency must be either 4, 8, 12, 16, 20, 24, 40 or 48 MHz.
3: In order to use the PLL, the crystal/resonator must produce a frequency of either 4, 8, 12 or 16 MHz.
4: This is the maximum crystal/resonator driver frequency. The internal FOSC frequency, when running from
the PLL, can be up to 48 MHz.
OSC1
CLKO
Q4 Q1 Q2 Q3 Q4 Q1
1
2
3344
2010 Microchip Technology Inc. Preliminary DS39974A-page 509
PIC18F47J13 FAMILY
TABLE 30-10: 96 MHz PLL CLOCK TIMING SPECIFICATIONS (VDDCORE = 2.35V TO 2.75V)
TABLE 30-11: 4x PLL CLOCK TIMING SPECIFICATIONS
TABLE 30-12: INTERNAL RC ACCURACY (INTOSC AND INTRC SOURCES)
Param
No. Sym Characteristic Min Typ† Max Units Conditions
F10 FOSC Oscillator Frequency Range 4 — 48 MHz
F11 FSYS On-Chip VCO System Frequency — 96 — MHz
F12 trc PLL Start-up Time (lock time) — — 2 ms
Param
No. Sym Characteristic Min Typ† Max Units Conditions
F10 FPLLIN PLL Input Frequency Range 4 — 12 MHz
F11 FPLLO PLL Output Frequency (4x FPLLIN)16—48MHz
F12 trc PLL Start-up Time (lock time) — — 2 ms
† Data in “Typ” column is at 3.3V, 25C, unless otherwise stated. These parameters are for design guidance
only and are not tested.
Param
No. Device Min Typ Max Units Conditions
INTOSC Accuracy @ Freq = 8 MHz, 4 MHz, 2 MHz, 1 MHz, 500 kHz, 250 kHz, 125 kHz, 31 kHz(1)
All Devices -1 +0.15 +1 % 0°C to +85°C VDD = 2.4V-3.6V,
VDDCORE = 2.3V-2.7V
-1 +0.25 +1 % -40°C to +85°C VDD = 2.0V-3.6V,
VDDCORE = 2.0V-2.7V
INTRC Accuracy @ Freq = 31 kHz(1)
All Devices 20.3 — 42.2 kHz -40°C to +85°C VDD = 2.0V-3.6V,
VDDCORE = 2.0V-2.7V
Note 1: The accuracy specification of the 31 kHz clock is determined by which source is providing it at a given time.
When INTSRC (OSCTUNE<7>) is ‘1’, use the INTOSC accuracy specification. When INTSRC is ‘0’, use
the INTRC accuracy specification.
PIC18F47J13 FAMILY
DS39974A-page 510 Preliminary 2010 Microchip Technology Inc.
FIGURE 30-6: CLKO AND I/O TIMING
TABLE 30-13: CLKO AND I/O TIMING REQUIREMENTS
Param
No. Symbol Characteristic Min Typ Max Units Conditions
10 TOSH2CKLOSC1 to CLKO — 75 200 ns (Note 1)
11 TOSH2CKHOSC1 to CLKO — 75 200 ns (Note 1)
12 TCKRCLKO Rise Time — 15 30 ns(Note 1)
13 TCKFCLKO Fall Time — 15 30 ns(Note 1)
14 TCKL2IOVCLKO to Port Out Valid — — 0.5 TCY + 20 ns
15 TIOV2CKH Port In Valid before CLKO 0.25 TCY + 25 — — ns
16 TCKH2IOI Port In Hold after CLKO 0——ns
17 TOSH2IOVOSC1 (Q1 cycle) to Port Out Valid — 50 150 ns
18 TOSH2IOIOSC1 (Q2 cycle) to Port Input Invalid
(I/O in hold time)
100 — — ns
19 TIOV2OSH Port Input Valid to OSC1 
(I/O in setup time)
0——ns
20 TIOR Port Output Rise Time — — 6 ns
21 TIOF Port Output Fall Time — — 5 ns
22† TINP INTx pin High or Low Time TCY ——ns
23† TRBP RB<7:4> Change INTx High or Low
Time
TCY ——ns
† These parameters are asynchronous events not related to any internal clock edges.
Note 1: Measurements are taken in EC mode, where CLKO output is 4 x TOSC.
Note: Refer to Figure 30-4 for load conditions.
OSC1
CLKO
I/O pin
(Input)
I/O pin
(Output)
Q4 Q1 Q2 Q3
10
13
14
17
20, 21
19 18
15
11
12
16
Old Value New Value
2010 Microchip Technology Inc. Preliminary DS39974A-page 511
PIC18F47J13 FAMILY
FIGURE 30-7: RESET, WATCHDOG TIMER, OSCILLA TOR S TART-UP TIMER AND
POWER-UP TIMER TIMING
TABLE 30-14: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER
AND BROWN-OUT RESET REQUIREMENTS
Param.
No. Symbol Characteristic Min Typ Max Units Conditions
30 TMCLMCLR Pulse Width (low) 2 — — s
31 TWDT Watchdog Timer Time-out Period
(no postscaler)
2.67 4.0 5.53 ms
32 TOST Oscillator Start-up Timer Period 1024 TOSC — 1024 TOSC —TOSC = OSC1 period
33 TPWRT Power-up Timer Period —
—
500
46
—
—
s
ms
F Devices
LF Devices
34 TIOZ I/O High-Impedance from MCLR
Low or Watchdog Timer Reset
——3 TCY + 2 s(Note 1)
36 TIRVST Time for Internal Reference
Voltage to become Stable
—20—s
37 TLVD High/Low-Voltage Detect
Pulse Width
—200— s
38 TCSD CPU Start-up Time — 200 — s(Note 2)
Note 1: The maximum TIOZ is the lesser of (3 TCY + 2 s) or 700 s.
2: MCLR rising edge to code execution, assuming TPWRT (and TOST if applicable) has already expired.
VDD
MCLR
Internal
POR
PWRT
Time-out
Oscillator
Time-out
Internal
Reset
Watchdog
Timer
Reset
33
32
30
31
34
I/O pins
34
Note: Refer to Figure 30-4 for load conditions.
PIC18F47J13 FAMILY
DS39974A-page 512 Preliminary 2010 Microchip Technology Inc.
TABLE 30-15: LOW-POWER WAKE-UP TIME
FIGU RE 30-8: T I MER 0 AN D TIMER1 EX TE RN AL C LO CK T I MI NG S
Param.
No. Symbol Characteristic Min Typ Max Units Conditions
W1 WDS Deep Sleep — 500 — s REGSLP = 1
W2 WSLEEP Sleep — 35 — s REGSLP = 1, PLLEN = 0,
FOSC = 8 MHz INTOSC
W3 WDOZE1 Sleep — 12 — s REGSLP = 0, PLLEN = 0,
FOSC = 8 MHz INTOSC
W4 WDOZE2 Sleep — 1.1 — s REGSLP = 0, PLLEN = 0,
FOSC = 8 MHz EC
W5 WDOZE3 Sleep — 230 — ns REGSLP = 0, PLLEN = 0,
FOSC = 48 MHz EC
W6 WIDLE Idle — 230 — ns FOSC = 48 MHz EC
Note: Refer to Figure 30-4 for load conditions.
46
47
45
48
41
42
40
T0CKI
T1OSO/T1CKI
TMR0 or
TMR1
2010 Microchip Technology Inc. Preliminary DS39974A-page 513
PIC18F47J13 FAMILY
TABLE 30-16: TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS
Param
No. Symbol Characteristic Min Max Units Conditions
40 TT0H T0CKI High Pulse Width No prescaler 0.5 TCY + 20 — ns
With prescaler 10 — ns
41 TT0L T0CKI Low Pulse Width No prescaler 0.5 TCY + 20 — ns
With prescaler 10 — ns
42 TT0P T0CKI Period No prescaler TCY + 10 — ns
With prescaler Greater of:
20 ns or
(T
CY + 40)/N
—nsN = prescale
value
(1, 2, 4,..., 256)
45 TT1H T1CKI/T3CKI
High Time
Synchronous, no prescaler 0.5 TCY + 20 — ns
Synchronous, with prescaler 10 — ns
Asynchronous 30 — ns
46 TT1L T1CKI/T3CKI
Low Time
Synchronous, no prescaler 0.5 TCY + 5 — ns
Synchronous, with prescaler 10 — ns
Asynchronous 30 — ns
47 TT1P T1CKI/T3CKI
Input Period
Synchronous Greater of:
20 ns or
(TCY + 40)/N
—nsN = prescale
value
(1, 2, 4, 8)
Asynchronous 83 — ns
FT1 T1CKI Input Frequency Range(1) DC 12 MHz
48 TCKE2TMRI Delay from External T1CKI Clock Edge to
Timer Increment
2 TOSC 7 TOSC —
Note 1: The Timer1 oscillator is designed to drive 32.768 kHz crystals. When T1CKI is used as a digital input,
frequencies up to 12 MHz are supported.
PIC18F47J13 FAMILY
DS39974A-page 514 Preliminary 2010 Microchip Technology Inc.
FIGURE 30-9: ENHANCED CAPTURE/COMP ARE/PWM TIMINGS
TABLE 30-17: ENHANCED CAPTURE/COMPARE/PWM REQUIREMENTS
Param
No. Symbol Characteristic Min Max Units Conditions
50 TCCL ECCPx Input Low Time No prescaler 0.5 TCY + 20 — ns
With prescaler 10 — ns
51 TCCH ECCPx Input High Time No prescaler 0.5 TCY + 20 — ns
With prescaler 10 — ns
52 TCCP ECCPx Input Period
3 T
CY + 40
N
3 TCY + 40
N
—nsN = prescale
value (1, 4 or 16)
53 TCCR ECCPx Output Fall Time — 25 ns
54 TCCF ECCPx Output Fall Time — 25 ns
Note: Refer to Figure 30-4 for load conditions.
ECCPx
(Capture Mode)
50 51
52
ECCPx
53 54
(Compare or PWM Mode)
2010 Microchip Technology Inc. Preliminary DS39974A-page 515
PIC18F47J13 FAMILY
FIGURE 30-10: PARALLEL MASTER PORT READ TIMING DIAGRAM
TABLE 30-18: PARALLEL MASTER PORT READ TIMING REQUIREMENTS
Param.
No Symbol Characteristics Min Typ Max Units
PM1 PMALL/PMALH Pulse Width — 0.5 TCY —ns
PM2 Address Out Valid to PMALL/PMALH
Invalid (address setup time)
— 0.75 TCY —ns
PM3 PMALL/PMALH Invalid to Address Out
Invalid (address hold time)
— 0.25 TCY —ns
PM5 PMRD Pulse Width — 0.5 TCY —ns
PM6 PMRD or PMENB Active to Data In Valid
(data setup time)
———ns
PM7 PMRD or PMENB Inactive to Data In Invalid
(data hold time)
———ns
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2
System
PMALL/PMALH
PMD<7:0>
Address
PMA<13:18>
Operating Conditions: 2.0V < VDD < 3.6V, -40°C < TA < +85°C unless otherwise stated.
PMWR
PMCS
PMRD
Clock
PM2
PM3
PM6
PM7
PM5
PM1
Data
Address<7:0>
PIC18F47J13 FAMILY
DS39974A-page 516 Preliminary 2010 Microchip Technology Inc.
FIGURE 30-11: PARALLEL MA STER PORT W R ITE TIMING DIAGRAM
TABLE 30-19: PARALLEL MASTER PORT WRITE TIMING REQUIREMENTS
Param.
No Symbol Characteristics Min Typ Max Units
PM11 PMWR Pulse Width — 0.5 T
CY —ns
PM12 Data Out Valid before PMWR or PMENB
goes Inactive (data setup time)
———ns
PM13 PMWR or PMEMB Invalid to Data Out
Invalid (data hold time)
———ns
PM16 PMCS Pulse Width T
CY – 5 — — ns
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2
System
PMALL/
PMD<7:0>
Address
PMA<13:18>
PMWR
PMCS
PMRD
Clock
PM12 PM13
PM11
PM16
Data
Address<7:0>
PMALH
Note: Operating Conditions: 2.0V < VDD < 3.6V, -40°C < TA < +85°C unless otherwise stated.
2010 Microchip Technology Inc. Preliminary DS39974A-page 517
PIC18F47J13 FAMILY
FIGURE 30-12: PA RALLEL SLAVE PORT TIMIN G
TABLE 30-20: PARALLEL SLAVE PORT REQU IREMEN TS
AC CHARACTERISTICS Standard Operating Conditions: 2.0V to 3.6V
(unless otherwise stated)
Operating temperature -40°C TA +85°C for Industrial
Param.
No. Symbol Characteristic Min Typ Max Units Conditions
PS1 TdtV2wrH Data In Valid before PMWR or PMCS
Inactive (setup time)
20 — — ns
PS2 TwrH2dtI PMWR or PMCS Inactive to Data–In
Invalid (hold time)
20 — — ns
PS3 TrdL2dtV PMRD and PMCS Active to Data–Out
Valid
— — 80 ns
PS4 TrdH2dtI PMRD Inactiveor PMCS Inactive to
Data–Out Invalid
10 — 30 ns
PMCS
PMRD
PMWR
PMD<7:0>
PS1
PS2
PS3
PS4
PIC18F47J13 FAMILY
DS39974A-page 518 Preliminary 2010 Microchip Technology Inc.
FIGURE 30-13: EXAMPLE SPI MASTER MODE TIMING (CKE = 0)
TABLE 30-21: EXAMPLE SPI MODE REQUIREMENTS (MASTER MODE, CKE = 0)
Param
No. Symbol Characteristic Min Max Units Conditions
73 TDIV2SCH,
TDIV2SCL
Setup Time of SDIx Data Input to SCKx Edge 35 — ns VDD = 3.3V,
VDDCORE = 2.5V
100 — ns VDD = 2.15V,
VDDCORE = 2.15V
74 TSCH2DIL,
TSCL2DIL
Hold Time of SDIx Data Input to SCKx Edge 30 — ns VDD = 3.3V,
VDDCORE = 2.5V
83 — ns VDD = 2.15V
75 TDOR SDOx Data Output Rise Time — 25 ns PORTB or PORTC
76 TDOF SDOx Data Output Fall Time — 25 ns PORTB or PORTC
78 TSCR SCKx Output Rise Time (Master mode) — 25 ns PORTB or PORTC
79 TSCF SCKx Output Fall Time (Master mode) — 25 ns PORTB or PORTC
SCKx
(CKP = 0)
SCKx
(CKP = 1)
SDOx
SDIx
73
74
75, 76
78
79
79
78
MSb LSb
bit 6 - - - - - - 1
MSb In LSb In
bit 6 - - - - 1
Note: Refer to Figure 30-4 for load conditions.
2010 Microchip Technology Inc. Preliminary DS39974A-page 519
PIC18F47J13 FAMILY
FIGURE 30-14: EXAMPLE SPI MASTER MODE TIMING (CKE = 1)
TABLE 30-22: EXAMPLE SPI MODE REQUIREMENTS (MASTER MODE, CKE = 1)
Param.
No. Symbol Characteristic Min Max Units Conditions
73 TDIV2SCH,
TDIV2SCL
Setup Time of SDIx Data Input to SCKx Edge 35 — ns VDD = 3.3V,
VDDCORE = 2.5V
100 — ns VDD = 2.15V,
VDDCORE = 2.15V
74 T
SCH2DIL,
T
SCL2DIL
Hold Time of SDIx Data Input to SCKx Edge 30 — ns VDD = 3.3V,
VDDCORE = 2.5V
83 — ns VDD = 2.15V
75 TDOR SDOx Data Output Rise Time — 25 ns PORTB or PORTC
76 TDOF SDOx Data Output Fall Time — 25 ns PORTB or PORTC
78 T
SCR SCKx Output Rise Time (Master mode) — 25 ns PORTB or PORTC
79 T
SCF SCKx Output Fall Time (Master mode) — 25 ns PORTB or PORTC
81 TDOV2SCH,
TDOV2SCL
SDOx Data Output Setup to SCKx Edge TCY —ns
SCKx
(CKP = 0)
SCKx
(CKP = 1)
SDOx
SDIx
81
74
75, 76
78
MSb
79
73
MSb In
bit 6 - - - - - - 1
LSb Inbit 6 - - - - 1
LSb
Note: Refer to Figure 30-4 for load conditions.
PIC18F47J13 FAMILY
DS39974A-page 520 Preliminary 2010 Microchip Technology Inc.
FIGURE 30-15: EXAMPLE SPI SLAVE MOD E TIMING (CKE = 0)
TABLE 30-23: EXAMPLE SPI MODE REQUIREMENTS (SLAVE MODE TIMING, CKE = 0)
Param
No. Symbol Characteristic Min Max Units Conditions
70 T
SSL2SCH,
T
SSL2SCL
SSx to SCKx or SCKx Input 3 TCY —ns
70A TSSL2WB SSx to Write to SSPxBUF 3 TCY —ns
71 TSCH SCKx Input High Time
(Slave mode)
Continuous 1.25 TCY + 30 — ns
71A Single byte 40 — ns (Note 1)
72 T
SCL SCKx Input Low Time
(Slave mode)
Continuous 1.25 TCY + 30 — ns
72A Single byte 40 — ns (Note 1)
73 TDIV2SCH,
TDIV2SCL
Setup Time of SDIx Data Input to SCKx Edge 25 — ns
73A TB2BLast Clock Edge of Byte 1 to the First Clock Edge
of Byte 2
1.5 TCY + 40 — ns (Note 2)
74 T
SCH2DIL,
T
SCL2DIL
Hold Time of SDIx Data Input to SCKx Edge 35 — ns VDD = 3.3V,
VDDCORE = 2.5V
100 — ns VDD = 2.15V
75 TDOR SDOx Data Output Rise Time — 25 ns PORTB or PORTC
76 TDOF SDOx Data Output Fall Time — 25 ns PORTB or PORTC
77 T
SSH2DOZ SSx to SDOx Output High-Impedance 10 70 ns
80 T
SCH2DOV,
T
SCL2DOV
SDOx Data Output Valid after SCKx Edge — 50 ns VDD = 3.3V,
VDDCORE = 2.5V
— 100 ns VDD = 2.15V
83 T
SCH2SSH,
T
SCL2SSH
SSx after SCKx Edge 1.5 TCY + 40 — ns
Note 1: Requires the use of Parameter #73A.
2: Only if Parameter #71A and #72A are used.
SSx
SCKx
(CKP = 0)
SCKx
(CKP = 1)
SDOx
SDI
70
71 72
73
74
75, 76 77
80
SDIx
MSb LSb
bit 6 - - - - - - 1
bit 6 - - - - 1 LSb In
83
Note: Refer to Figure 30-4 for load conditions.
MSb In
2010 Microchip Technology Inc. Preliminary DS39974A-page 521
PIC18F47J13 FAMILY
FIGURE 30-16: EXAMPLE SPI SLAVE MOD E TIMING (CKE = 1)
TABLE 30-24: EXAMPLE SPI SLAVE MODE REQUIREMENTS (CKE = 1)
Param
No. Symbol Characteristic Min Max Units Conditions
70 TSSL2SCH,
TSSL2SCL
SSx to SCKx or SCKx Input 3 TCY —ns
70A TSSL2WB SSx to Write to SSPxBUF 3 TCY —ns
71 TSCH SCKx Input High Time
(Slave mode)
Continuous 1.25 TCY + 30 — ns
71A Single byte 40 — ns (Not e 1)
72 TSCL SCKx Input Low Time
(Slave mode)
Continuous 1.25 TCY + 30 — ns
72A Single byte 40 — ns (Not e 1)
73 TDIV2SCH,
TDIV2SCL
Setup Time of SDIx Data Input to SCKx Edge 25 — ns
73A TB2BLast Clock Edge of Byte 1 to the First Clock Edge of Byte 2 1.5 TCY + 40 — ns ( N ot e 2)
74 TSCH2DIL,
TSCL2DIL
Hold Time of SDIx Data Input to SCKx Edge 35 — ns VDD = 3.3V,
VDDCORE = 2.5V
100 — ns VDD = 2.15V
75 TDOR SDOx Data Output Rise Time — 25 ns
76 TDOF SDOx Data Output Fall Time — 25 ns
77 TSSH2DOZSSx to SDOx Output High-Impedance 10 70 ns
80 T
SCH2DOV,
T
SCL2DOV
SDOx Data Output Valid after SCKx Edge — 50 ns VDD = 3.3V,
VDDCORE = 2.5V
—100nsV
DD = 2.15V
81 TDOV2SCH,
TDOV2SCL
SDOx Data Output Setup to SCKx Edge TCY —ns
82 T
SSL2DOV SDOx Data Output Valid after SSx Edge — 50 ns
83 T
SCH2SSH,
T
SCL2SSH
SSx after SCKx Edge 1.5 TCY + 40 — ns
Note 1: Requires the use of Parameter #73A.
2: Only if Parameter #71A and #72A are used.
SSx
SCKx
(CKP = 0)
SCKx
(CKP = 1)
SDOx
SDI
70
71 72
82
SDIx
74
75, 76
MSb bit 6 - - - - - - 1 LSb
77
bit 6 - - - - 1 LSb In
80
83
Note: Refer to Figure 30-4 for load conditions.
73
MSb In
PIC18F47J13 FAMILY
DS39974A-page 522 Preliminary 2010 Microchip Technology Inc.
FIGURE 30 - 17: I2C™ BUS START/STOP BITS T IMING
TABLE 30-25: I2C™ BUS START/STOP BITS REQUIREMENTS (SLAVE MODE)
FIGURE 30 - 18: I2C™ BUS DATA T IMING
Param.
No. Symbol Characteristic Min Max Units Conditions
90 TSU:STA Start Condition 100 kHz mode 4700 — ns Only relevant for Repeated
Start condition
Setup Time 400 kHz mode 600 —
91 THD:STA Start Condition 100 kHz mode 4000 — ns After this period, the first
clock pulse is generated
Hold Time 400 kHz mode 600 —
92 TSU:STO Stop Condition 100 kHz mode 4700 — ns
Setup Time 400 kHz mode 600 —
93 THD:STO Stop Condition 100 kHz mode 4000 — ns
Hold Time 400 kHz mode 600 —
Note: Refer to Figure 30-4 for load conditions.
91
92
93
SCLx
SDAx
Start
Condition
Stop
Condition
90
Note: Refer to Figure 30-4 for load conditions.
90
91 92
100
101
103
106 107
109 109
110
102
SCLx
SDAx
In
SDAx
Out
2010 Microchip Technology Inc. Preliminary DS39974A-page 523
PIC18F47J13 FAMILY
TABLE 30-26: I2C™ BUS DATA REQUIREMENTS (SLAVE MODE)
Param.
No. Symbol Characteristic Min Max Units Conditions
100 THIGH Clock High Time 100 kHz mode 4.0 — s
400 kHz mode 0.6 — s
MSSP modules 1.5 TCY —
101 TLOW Clock Low Time 100 kHz mode 4.7 — s
400 kHz mode 1.3 — s
MSSP modules 1.5 TCY —
102 TRSDAx and SCLx Rise Time 100 kHz mode — 1000 ns
400 kHz mode 20 + 0.1 CB300 ns CB is specified to be from
10 to 400 pF
103 TFSDAx and SCLx Fall Time 100 kHz mode — 300 ns
400 kHz mode 20 + 0.1 CB300 ns CB is specified to be from
10 to 400 pF
90 TSU:STA Start Condition Setup Time 100 kHz mode 4.7 — s Only relevant for Repeated
Start condition
400 kHz mode 0.6 — s
91 THD:STA Start Condition Hold Time 100 kHz mode 4.0 — s After this period, the first clock
pulse is generated
400 kHz mode 0.6 — s
106 THD:DAT Data Input Hold Time 100 kHz mode 0 — ns
400 kHz mode 0 0.9 s
107 TSU:DAT Data Input Setup Time 100 kHz mode 250 — ns (Note 2)
400 kHz mode 100 — ns
92 TSU:STO Stop Condition Setup Time 100 kHz mode 4.7 — s
400 kHz mode 0.6 — s
109 TAA Output Valid from Clock 100 kHz mode — 3500 ns (Note 1)
400 kHz mode — — ns
110 TBUF Bus Free Time 100 kHz mode 4.7 — s Time the bus must be free
before a new transmission can
start
400 kHz mode 1.3 — s
D102 CBBus Capacitive Loading — 400 pF
Note 1: As a transmitter, the device must provide this internal minimum delay time to bridge the undefined region (min. 300 ns)
of the falling edge of SCLx to avoid unintended generation of Start or Stop conditions.
2: A Fast mode I2C™ bus device can be used in a Standard mode I2C bus system, but the requirement, TSU:DAT 250 ns,
must then be met. This will automatically be the case if the device does not stretch the LOW period of the SCLx signal.
If such a device does stretch the LOW period of the SCLx signal, it must output the next data bit to the SDAx line, TR
max. + TSU:DAT = 1000 + 250 = 1250 ns (according to the Standard mode I2C bus specification), before the SCLx line is
released.
PIC18F47J13 FAMILY
DS39974A-page 524 Preliminary 2010 Microchip Technology Inc.
FIGURE 30 - 19: MSSPx I2C™ BUS START/STOP BITS TIMING WAVEFORMS
TABLE 30-27: MSSPx I2C™ BUS START/STOP BITS REQUIREMENTS
FIGURE 30 - 20: MSSPx I2C ™ BUS DA T A T IMIN G
Param.
No. Symbol Characteristic Min Max Units Conditions
90 TSU:STA Start Condition 100 kHz mode 2(TOSC)(BRG + 1) — ns Only relevant for
Repeated Start
condition
Setup Time 400 kHz mode 2(TOSC)(BRG + 1) —
91 THD:STA Start Condition 100 kHz mode 2(TOSC)(BRG + 1) — ns After this period, the
first clock pulse is
generated
Hold Time 400 kHz mode 2(TOSC)(BRG + 1) —
92 TSU:STO Stop Condition 100 kHz mode 2(TOSC)(BRG + 1) — ns
Setup Time 400 kHz mode 2(TOSC)(BRG + 1) —
93 THD:STO Stop Condition 100 kHz mode 2(TOSC)(BRG + 1) — ns
Hold Time 400 kHz mode 2(TOSC)(BRG + 1) —
Note: Refer to Figure 30-4 for load conditions.
91 93
SCLx
SDAx
Start
Condition
Stop
Condition
90 92
Note: Refer to Figure 30-4 for load conditions.
90 91 92
100
101
103
106 107
109 109 110
102
SCLx
SDAx
In
SDAx
Out
2010 Microchip Technology Inc. Preliminary DS39974A-page 525
PIC18F47J13 FAMILY
TABLE 30-28: MSSPx I2C™ BUS DATA REQUIREMENTS
FIGURE 30-21: EU SARTx SYNCHRONOUS TRANSMISSION (MASTER/ SLAVE) TIMIN G
Param.
No. Symbol Characteristic Min Max Units Conditions
100 THIGH Clock High Time 100 kHz mode 2(TOSC)(BRG + 1) — s
400 kHz mode 2(TOSC)(BRG + 1) — s
101 TLOW Clock Low Time 100 kHz mode 2(TOSC)(BRG + 1) — s
400 kHz mode 2(TOSC)(BRG + 1) — s
102 TRSDAx and SCLx
Rise Time
100 kHz mode — 1000 ns CB is specified to be
from 10 to 400 pF
400 kHz mode 20 + 0.1 CB300 ns
103 TFSDAx and SCLx
Fall Time
100 kHz mode — 300 ns CB is specified to be
from 10 to 400 pF
400 kHz mode 20 + 0.1 CB 300 ns
90 T
SU:STA Start Condition
Setup Time
100 kHz mode 2(TOSC)(BRG + 1) — s Only relevant for
Repeated Start condition
400 kHz mode 2(TOSC)(BRG + 1) — s
91 THD:STA Start Condition
Hold Time
100 kHz mode 2(TOSC)(BRG + 1) — s After this period, the first
clock pulse is generated
400 kHz mode 2(TOSC)(BRG + 1) — s
106 THD:DAT Data Input
Hold Time
100 kHz mode 0 — ns
400 kHz mode 0 0.9 s
107 T
SU:DAT Data Input
Setup Time
100 kHz mode 250 — ns (Note 1)
400 kHz mode 100 — ns
92 TSU:STO Stop Condition
Setup Time
100 kHz mode 2(TOSC)(BRG + 1) — s
400 kHz mode 2(TOSC)(BRG + 1) — s
109 TAA Output Valid
from Clock
100 kHz mode — 3450 ns
400 kHz mode — 900 ns
110 TBUF Bus Free Time 100 kHz mode 4.7 — s Time the bus must be
free before a new
transmission can start
400 kHz mode 1.3 — s
D102 CBBus Capacitive Loading — 400 pF
Note 1: A Fast mode I2C bus device can be used in a Standard mode I2C bus system, but parameter
#107 250 ns must then be met. This will automatically be the case if the device does not stretch the LOW
period of the SCLx signal. If such a device does stretch the LOW period of the SCLx signal, it must output
the next data bit to the SDAx line, parameter #102 + parameter #107 = 1000 + 250 = 1250 ns (for 100 kHz
mode), before the SCLx line is released.
121 121
120 122
TXx/CKx
RXx/DTx
pin
pin
Note: Refer to Figure 30-4 for load conditions.
PIC18F47J13 FAMILY
DS39974A-page 526 Preliminary 2010 Microchip Technology Inc.
TABLE 30-29: EUSARTx SYNCHRONOUS TRANSMISSION REQUIREMENTS
FIGURE 30-22: EUSARTx SYNCHRONOUS RECEIVE (MASTER/SLAVE) TIMING
TABLE 30-30: EUSARTx SYNCHRONOUS RECEIVE REQUIREMENTS
Param
No. Symbol Characteristic Min Max Units Conditions
120 T
CKH2DTV Sync XMIT (Master and Slave)
Clock High to Data Out Valid — 40 ns
121 TCKRF Clock Out Rise Time and Fall Time (Master mode) — 20 ns
122 TDTRF Data Out Rise Time and Fall Time — 20 ns
Param.
No. Symbol Characteristic Min Max Units Conditions
125 TDTV2CKL Sync RCV (Master and Slave)
Data Hold before CKx (DTx hold time) 10 — ns
126 TCKL2DTL Data Hold after CKx (DTx hold time) 15 — ns
125
126
TXx/CKx
RXx/DTx
pin
pin
Note: Refer to Figure 30-4 for load conditions.
2010 Microchip Technology Inc. Preliminary DS39974A-page 527
PIC18F47J13 FAMILY
TABLE 30-31: A/D CONVERTER CHARACTERISTICS: PIC18F47J13 FAMILY (INDUSTRIAL)
FIGURE 30-23: A/D CONVERSION TIMING
Param
No. Symbol Characteristic Min Typ Max Units Conditions
A01 NRResolution — — 12 bit VREF 3.0V
A03 EIL Integral Linearity Error — <±1 ±2 LSb VREF 3.0V
A04 EDL Differential Linearity Error — <±1 1.5 LSb VREF 3.0V
A06 EOFF Offset Error — <±1 5 LSb VREF 3.0V
A07 EGN Gain Error — — <±3.5 LSb VREF 3.0V
A10 Monotonicity Guaranteed(1) —VSS VAIN VREF
A20 VREF Reference Voltage Range
(VREFH – VREFL)
2.0
3
—
—
—
—
V
V
VDD 3.0V
VDD 3.0V
A21 VREFH Reference Voltage High
For 10-bit resolution
For 12-bit resolution
VREFL
VSS + 3V
—
—
VDD + 0.3V
VDD + 0.3V
V
V
A22 VREFL Reference Voltage Low
For 10-bit resolution
For 12-bit resolution
VSS – 0.3V
VSS – 0.3V
—
—
VREFH
VDD - 3V
V
V
A25 VAIN Analog Input Voltage VREFL —VREFH V
A30 ZAIN Recommended Impedance of
Analog Voltage Source
For 10-bit resolution
For 12-bit resolution
—
—
—
—
2.5
1
k
k
A50 IREF VREF Input Current(2) —
—
—
—
5
150
A
A
During VAIN acquisition.
During A/D conversion
cycle.
Note 1: The A/D conversion result never decreases with an increase in the input voltage and has no missing codes.
2: VREFH current is from RA3/AN3/C1INBVREF+ pin or VDD, whichever is selected as the VREFH source.
VREFL current is from RA2/AN2/C2INB/C1IND/C3INB/VREF-/CVREF pin or VSS, whichever is selected as the
VREFL source.
131
130
132
BSF ADCON0, GO
Q4
A/D CLK
A/D DATA
ADRES
ADIF
GO
SAMPLE
OLD_DATA
SAMPLING STOPPED
DONE
NEW_DATA
(Note 2)
98 7 2 1 0
Note 1: If the A/D clock source is selected as RC, a time of TCY is added before the A/D clock starts.
This allows the SLEEP instruction to be executed.
2: This is a minimal RC delay (typically 100 ns), which also disconnects the holding capacitor from the analog input.
. . . . . .
TCY (Note 1)
PIC18F47J13 FAMILY
DS39974A-page 528 Preliminary 2010 Microchip Technology Inc.
TABLE 30-32: 10-BIT A/D CONVERSION REQUIREMENTS
TABLE 30-33: 12-BIT A/D CONVERSION REQUIREMENTS
Param
No. Symbol Characteristic Min Max Units Conditions
130 TAD A/D Clock Period 0.7 25.0(1) sTOSC based, VREF 3.0V
131 TCNV Conversion Time
(not including acquisition time)(2) 11 12 TAD
132 TACQ Acquisition Time(3) 1.4 — s-40C to +85C
135 TSWC Switching Time from Convert Sample — (Note 4)
137 TDIS Discharge Time 0.2 — s
Note 1: The time of the A/D clock period is dependent on the device frequency and the TAD clock divider.
2: ADRES registers may be read on the following T
CY cycle.
3: The time for the holding capacitor to acquire the “New” input voltage when the voltage changes full scale
after the conversion (VDD to VSS or VSS to VDD). The source impedance (RS) on the input channels is 50W.
4: On the following cycle of the device clock.
Param
No. Symbol Characteristic Min Max Units Conditions
130 TAD A/D Clock Period 0.8 12.5(1) sTOSC based, VREF 3.0V
131 TCNV Conversion Time
(not including acquisition time)(2) 13 14 TAD
132 TACQ Acquisition Time(3) 1.4 — s
135 TSWC Switching Time from Convert Sample — (Note 4)
137 TDIS Discharge Time 0.2 — s
Note 1: The time of the A/D clock period is dependent on the device frequency and the TAD clock divider.
2: ADRES registers may be read on the following TCY cycle.
3: The time for the holding capacitor to acquire the “New” input voltage when the voltage changes full scale
after the conversion (VDD to VSS or VSS to VDD). The source impedance (RS) on the input channels is 50.
4: On the following cycle of the device clock.
2010 Microchip Technology Inc. Preliminary DS39974A-page 529
PIC18F47J13 FAMILY
31.0 PACKAGING INFORMATION
31.1 Package Marking Information
Legend: XX...X Customer-specific information
Y Year code (last digit of calendar year)
YY Year code (last 2 digits of calendar year)
WW Week code (week of January 1 is week ‘01’)
NNN Alphanumeric traceability code
Pb-free JEDEC designator for Matte Tin (Sn)
*This package is Pb-free. The Pb-free JEDEC designator ( )
can be found on the outer packaging for this package.
Note: In the event the full Microchip part number cannot be marked on one line, it will
be carried over to the next line, thus limiting the number of available
characters for customer-specific information.
3
e
28-Lead SOIC (.300”)
XXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXX
YYWWNNN
Example
PIC18F26J50/SO
0910017
3
e
28-Lead SPDIP
XXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXX
YYWWNNN
Example
-I/SP
PIC18F27J13
1010017
3
e
28-Lead SSOP
XXXXXXXXXXXX
XXXXXXXXXXXX
YYWWNNN
Example
PIC18F27J13
-I/SS
1010017
28-Lead SOIC (.300”)
XXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXX
YYWWNNN
Example
PIC18F27J13/SO
1010017
3
e
28-Lead QFN
XXXXXXXX
XXXXXXXX
YYWWNNN
Example
18F27J13
/ML
1010017
3
e
PIC18F47J13 FAMILY
DS39974A-page 530 Preliminary 2010 Microchip Technology Inc.
Package Marking Information (Continue d)
XXXXXXXXXX
44-Lead QFN
XXXXXXXXXX
XXXXXXXXXX
YYWWNNN
18F47J13
Example
-I/ML
1010017
44-Lead TQFP
XXXXXXXXXX
XXXXXXXXXX
XXXXXXXXXX
YYWWNNN
Example
18F47J13
-I/PT
1010017
3
e
3
e
2010 Microchip Technology Inc. Preliminary DS39974A-page 531
PIC18F47J13 FAMILY
31.2 Package Details
The following sections give the technical details of the packages.
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DEXPOSED D2
e
b
K
E2
E
L
N
NOTE 1
1
2
2
1
N
A
A1
A3
TOP VIEW BOTTOM VIEW
PAD
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PIC18F47J13 FAMILY
DS39974A-page 532 Preliminary 2010 Microchip Technology Inc.
+,)+,-.&'% !+,/("
*
  !"#$%!&'(!%&! %(%")%%%"
 ?$%0% %
+ &  ","%!"&"$ %!  "$ %!   %#".&& "
 & "%,-.
/01 / & %#%! ))%!%% 
,21 $& '! !)%!%%'$$&%!  
* 2%& %!%*") '  %*$%%"%
%%133)))&&3*
4% 55,,
& 5&% 6 67 8
6!&($ 6 9
% /0
7;% > > :.
""**  . > >
%"$$?   > +
7<"% , +/0
""*<"% , ./0
75% /0
0&$@%A . > .
2%5% 5  > 
2%% 5 ,2
2% IB > 9B
5"* 9 > ++
5"<"% ( + > .
"$% D.B > .B
"$%/%%& E.B > .B
c
h
h
L
L1
A2
A1
A
NOTE 1
123
b
e
E
E1
D
φ
β
α
N
  ) 0./
2010 Microchip Technology Inc. Preliminary DS39974A-page 533
PIC18F47J13 FAMILY
Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
PIC18F47J13 FAMILY
DS39974A-page 534 Preliminary 2010 Microchip Technology Inc.
+)) 0/))+1%% !+0/"
*
  !"#$%!&'(!%&! %(%")%%%"
 ?$%0% %
+ &  ","%!"&"$ %!  "$ %!   %#"C "
 & "%,-.
/01 / & %#%! ))%!%% 
* 2%& %!%*") '  %*$%%"%
%%133)))&&3*
4% 60;,
& 5&% 6 67 8
6!&($ 6 9
% /0
%% > > 
""**   +. .
/ %%  . > >
!"%!"<"% ,  + ++.
""*<"% ,  9. .
75% +. +:. 
%% 5  + .
5"* 9  .
45"<"% (  . 
5)5"<"% (  9 
7)? / > > +
NOTE 1
N
12
D
E1
eB
c
E
L
A2
eb
b1
A1
A
3
  ) 0/
2010 Microchip Technology Inc. Preliminary DS39974A-page 535
PIC18F47J13 FAMILY
+$2)+,)++'&1% !++,"
*
  !"#$%!&'(!%&! %(%")%%%"
 &  ","%!"&"$ %!  "$ %!   %#"&& "
+ & "%,-.
/01 / & %#%! ))%!%% 
,21 $& '! !)%!%%'$$&%!  
* 2%& %!%*") '  %*$%%"%
%%133)))&&3*
4% 55,,
& 5&% 6 67 8
6!&($ 6 9
% :./0
7;% > > 
""**  :. . 9.
%"$$  . > >
7<"% ,  9 9
""*<"% , . .+ .:
75%   .
2%5% 5 .. . .
2%% 5 .,2
5"*  > .
2% IB B 9B
5"<"% (  > +9
L
L1
c
A2
A1
A
E
E1
D
N
12
NOTE 1 b
e
φ
  ) 0+/
PIC18F47J13 FAMILY
DS39974A-page 536 Preliminary 2010 Microchip Technology Inc.
Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
2010 Microchip Technology Inc. Preliminary DS39974A-page 537
PIC18F47J13 FAMILY
33 !"
*
  !"#$%!&'(!%&! %(%")%%%"
 *  ) !%"
+ & "%,-.
/01 / & %#%! ))%!%% 
,21 $& '! !)%!%%'$$&%!  
* 2%& %!%*") '  %*$%%"%
%%133)))&&3*
4% 55,,
& 5&% 6 67 8
6!&($ 6 
% :./0
7;% 9  
%"$$    .
0%%* + ,2
7<"% , 9/0
,# ""<"% , :+ :. :9
75% 9/0
,# ""5%  :+ :. :9
0%%<"% ( . + +9
0%%5% 5 +  .
0%%%,# "" =  > >
DEXPOSED
PAD
D2
e
b
K
L
E2
2
1
N
NOTE 1
2
1
E
N
BOTTOM VIEW
TOP VIEW
A3 A1
A
  ) 0+/
PIC18F47J13 FAMILY
DS39974A-page 538 Preliminary 2010 Microchip Technology Inc.
33 !"
* 2%& %!%*") '  %*$%%"%
%%133)))&&3*
2010 Microchip Technology Inc. Preliminary DS39974A-page 539
PIC18F47J13 FAMILY
334$)546%6%6 &%%!4"
*
  !"#$%!&'(!%&! %(%")%%%"
 0&$ % %D E&
+ &  ","%!"&"$ %!  "$ %!   %#".&& "
 & "%,-.
/01 / & %#%! ))%!%% 
,21 $& '! !)%!%%'$$&%!  
* 2%& %!%*") '  %*$%%"%
%%133)))&&3*
4% 55,,
& 5&% 6 67 8
6!&($5" 6 
5"% 9/0
7;% > > 
""**  .  .
%"$$  . > .
2%5% 5 . : .
2%% 5 ,2
2% IB +.B B
7<"% , /0
75% /0
""*<"% , /0
""*5% /0
5"*  > 
5"<"% ( + + .
"$% DB B +B
"$%/%%& EB B +B
A
E
E1
D
D1
e
b
NOTE 1 NOTE 2
N
123
c
A1
L
A2
L1
α
φ
β
  ) 0:/
PIC18F47J13 FAMILY
DS39974A-page 540 Preliminary 2010 Microchip Technology Inc.
334$)546%6%6 &%%!4"
* 2%& %!%*") '  %*$%%"%
%%133)))&&3*
2010 Microchip Technology Inc. Preliminary DS39974A-page 541
PIC18F47J13 FAMILY
APPENDIX A: REVISION HISTORY
Revision A (March 2010)
Original data sheet for PIC18F47J13 family devices.
APPENDIX B: MIGRATION FROM
PIC18F46J11 TO
PIC18F47J13
Code for the devices in the PIC18F46J11 family can be
migrated to the PIC18F47J13 without many changes.
The differences between the two device families are
listed in Table B-1.
TABLE B-1: NOTABLE DIFFERENCES BETWEEN PIC18F47J13 AND PIC18F46J11 FAMILIES
Characteristic PIC18F47J13 Family 18F46J11 Family
Maximum Program Memory 128 Kbytes 64 Kbytes
Oscillator Options PLL can be enabled at start-up with the
Configuration bit option.
96 MHz PLL circuit is available via the
Configuration bit setting, allowing
48 MHz operation from INTOSC.
Default 4x PLL circuit is still available.
Requires firmware to set the PLLEN bit
at run time.
4x PLL circuit only. Maximum operating
frequency from INTOSC is 32 MHz.
SOSC Oscillator Options Low-power oscillator option for SOSC,
with run-time switch.
Low-power oscillator option for SOSC,
only via the Configuration bit setting.
T1CKI Clock Input T1CKI can be used as a clock input
without enabling the Timer1 oscillator.
No
Timers 8 5
ECCP 3 2
CCP 7 0
SPI FOSC/8 Master Clock
Option
Yes No
Second I2C™ Port Yes, all packages. Yes, but only on 44-pin devices.
ADC 13 Channel, 10/12-Bit Conversion modes
with Special Event Trigger option.
13 Channel, 10-bit only.
Peripheral Module Disable
Bits
Yes, allowing further power reduction. No
Band Gap Voltage Reference
Output
Yes, enabled on pin, RA1, by setting the
VBGOE bit (WDTCON<4>).
No
REPU/RDPU Pull-Up Enable
Bits
Moved to TRISE register (avoids read,
modify, write issues).
Pull-up bits configured in PORTE register
Comparators Three, each with four input pin selections. Two, each with two input pin selections.
Increased Output Drive
Strength
RA0 through RA5, RDx and REx. No
PWRT Period F Devices – 500 s
LF Devices – 46 ms
F Devices – 1 ms
LF Devices – 64 ms
PIC18F47J13 FAMILY
DS39974A-page 542 Preliminary 2010 Microchip Technology Inc.
NOTES:
2010 Microchip Technology Inc. Preliminary DS39974A-page 543
PIC18F47J13 FAMILY
INDEX
A
A/D ................................................................................... 367
A/D Converter Interrupt, Configuring ....................... 373
Acquisition Requirements ........................................ 374
ADCAL Bit ................................................................ 377
ADRESH Register .................................................... 372
Analog Port Pins, Configuring .................................. 375
Associated Registers ............................................... 378
Automatic Acquisition Time ...................................... 375
Calibration ................................................................ 377
Configuring the Module ............................................ 373
Conversion Clock (TAD) ........................................... 375
Conversion Requirements, 10-Bit ............................ 528
Conversion Requirements, 12-Bit ............................ 528
Conversion Status (GO/DONE Bit) .......................... 372
Conversions ............................................................. 376
Converter Characteristics ........................................ 527
Operation in Power-Managed Modes ...................... 378
Use of the Special Event Triggers ........................... 376
Absolute Maximum Ratings ............................................. 487
AC (Timing) Characteristics ............................................. 506
Load Conditions for Device Timing
Specifications ................................................... 507
Parameter Symbology ............................................. 506
Temperature and Voltage Specifications ................. 507
Timing Conditions .................................................... 507
ACKSTAT ......................................................................... 335
ACKSTAT Status Flag ..................................................... 335
ADCAL Bit ........................................................................ 377
ADCON0 Register
GO/DONE Bit ........................................................... 372
ADDFSR .......................................................................... 476
ADDLW ............................................................................ 439
ADDULNK ........................................................................ 476
ADDWF ............................................................................ 439
ADDWFC ......................................................................... 440
ADRESL Register ............................................................ 372
Analog-to-Digital Converter. See A/D.
ANDLW ............................................................................ 440
ANDWF ............................................................................ 441
Assembler
MPASM Assembler .................................................. 484
Auto-Wake-up on Sync Break Character ......................... 358
B
Baud Rate Generator ....................................................... 331
BC .................................................................................... 441
BCF .................................................................................. 442
BF ..................................................................................... 335
BF Status Flag ................................................................. 335
Block Diagrams
+5V System Hardware Interface .............................. 140
8-Bit Multiplexed Address and Data
Application ....................................................... 201
A/D ........................................................................... 372
Analog Input Model .................................................. 373
Baud Rate Generator ............................................... 332
Capture Mode Operation ................................. 262, 273
Clock Source Multiplexing ........................................ 250
Comparator Analog Input Model .............................. 382
Comparator Simplified ............................................. 379
Comparator Voltage Reference ............................... 387
Comparator Voltage Reference Output Buffer
Example ........................................................... 389
Compare Mode Operation ................................264, 274
CTMU ...................................................................... 397
CTMU Current Source Calibration Circuit ................ 400
CTMU Typical Connections, Internal Configuration
for Pulse Delay Generation ............................. 408
CTMU Typical Connections, Internal Configuration
for Time Measurement .................................... 407
Demultiplexed Addressing Mode ............................. 194
Device Clock .............................................................. 36
Enhanced PWM Mode ............................................. 275
EUSART Transmit ................................................... 355
EUSARTx Receive .................................................. 357
Fail-Safe Clock Monitor ........................................... 429
Fully Multiplexed Addressing Mode ......................... 194
Generic I/O Port Operation ...................................... 139
High/Low-Voltage Detect with External Input .......... 392
Interrupt Logic .......................................................... 120
LCD Control, Byte Mode .......................................... 202
Legacy Parallel Slave Port ....................................... 188
MSSPx (I2C Master Mode) ...................................... 330
MSSPx (I2C Mode) .................................................. 310
MSSPx (SPI Mode) .................................................. 292
Multiplexed Addressing Application ......................... 201
On-Chip Reset Circuit ................................................ 65
Parallel EEPROM (Up to 15-Bit Address,
16-Bit Data) ..................................................... 202
Parallel EEPROM (Up to 15-Bit Address,
8-Bit Data) ....................................................... 202
Parallel Master/Slave Connection
Addressed Buffer ............................................. 191
Parallel Master/Slave Connection Buffered ............. 190
Partially Multiplexed Addressing Application ........... 201
Partially Multiplexed Addressing Mode .................... 194
PIC18F2XJ13 (28-Pin) ............................................... 14
PIC18F4XJ13 (44-Pin) ............................................... 15
PMP Module Overview ............................................ 179
PWM Operation (Simplified) .................................... 266
Reads From Flash Program Memory ...................... 111
RTCC ....................................................................... 237
Serial Resistor ........................................................... 63
Simplified Steering ................................................... 288
Single Comparator ................................................... 382
Table Read Operation ............................................. 107
Table Write Operation .............................................. 108
Table Writes to Flash Program Memory .................. 113
Timer0 in 16-Bit Mode ............................................. 206
Timer0 in 8-Bit Mode ............................................... 206
Timer1 ..................................................................... 212
Timer2 ..................................................................... 220
Timer3/5 .................................................................. 225
Timer4 ..................................................................... 234
Using the Open-Drain Output .................................. 140
Watchdog Timer ...................................................... 424
BN .................................................................................... 442
BNC ................................................................................. 443
BNN ................................................................................. 443
BNOV ............................................................................... 444
BNZ .................................................................................. 444
BOR. See Brown-out Reset.
BOV ................................................................................. 447
BRA ................................................................................. 445
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DS39974A-page 544 Preliminary 2010 Microchip Technology Inc.
Break Character (12-Bit) Transmit and Receive .............. 360
BRG. See Baud Rate Generator.
Brown-out Reset (BOR) ..................................................... 67
and On-Chip Voltage Regulator ............................... 427
Detecting .................................................................... 67
Disabling in Sleep Mode ............................................ 67
BSF .................................................................................. 445
BTFSC ............................................................................. 446
BTFSS .............................................................................. 446
BTG .................................................................................. 447
BZ ..................................................................................... 448
C
C Compilers
MPLAB C18 ............................................................. 484
Calibration (A/D Converter) .............................................. 377
CALL ................................................................................ 448
CALLW ............................................................................. 477
Capture (CCP Module) ..................................................... 262
Associated Registers ............................................... 265
CCP Pin Configuration ............................................. 262
CCPR4H:CCPR4L Registers ................................... 262
Software Interrupt ..................................................... 263
Timer1/Timer3 Mode Selection ................................ 262
Capture (ECCP Module) .................................................. 272
CCPRxH:CCPRxL Registers ................................... 272
ECCP Pin Configuration ........................................... 272
Prescaler .................................................................. 273
Software Interrupt ..................................................... 273
Timer1/Timer3 Mode Selection ................................ 273
Capture/Compare/PWM (CCP) ........................................ 257
Capture Mode .......................................................... 262
Capture Mode. See Capture.
CCP Mode and Timer Resources ............................ 261
CCPRxH Register .................................................... 261
CCPRxL Register ..................................................... 261
Compare Mode. See Compare.
Configuration ............................................................ 261
Open-Drain Output Option ....................................... 262
CCP .................................................................................. 261
Clock Sources .................................................................... 41
Effects of Power-Managed Modes ............................. 45
Selecting the 31 kHz Source ...................................... 41
Selection Using OSCCON Register ........................... 41
CLRF ................................................................................ 449
CLRWDT .......................................................................... 449
Code Examples
16 x 16 Signed Multiply Routine ............................... 118
16 x 16 Unsigned Multiply Routine ........................... 118
512-Byte SPI Master Mode Init and Transfer ........... 308
8 x 8 Signed Multiply Routine ................................... 117
8 x 8 Unsigned Multiply Routine ............................... 117
A/D Calibration Routine ............................................ 378
Calculating Baud Rate Error .................................... 350
Capacitance Calibration Routine .............................. 404
Capacitive Touch Switch Routine ............................ 406
Changing Between Capture Prescalers ........... 263, 273
Communicating with the +5V System ...................... 140
Computed GOTO Using an Offset Value ................... 85
Configuring EUSART2 Input and
Output Functions .............................................. 162
Current Calibration Routine ...................................... 402
Erasing Flash Program Memory .............................. 112
Fast Register Stack .................................................... 85
How to Clear RAM (Bank 1) Using
Indirect Addressing .......................................... 101
Initializing PORTA .................................................... 143
Initializing PORTB .................................................... 146
Initializing PORTC ................................................... 150
Initializing PORTD ................................................... 153
Initializing PORTE .................................................... 156
Loading the SSP1BUF (SSP1SR) Register ............. 295
Reading a Flash Program Memory Word ................ 111
Saving STATUS, WREG and BSR
Registers in RAM ............................................. 138
Setting the RTCWREN Bit ....................................... 251
Setup for CTMU Calibration Routines ..................... 401
Single-Word Write to Flash Program Memory ......... 115
Two-Word Instructions ............................................... 87
Ultra Low-Power Wake-up Initialization ..................... 62
Writing to Flash Program Memory ........................... 114
Code Protection ............................................................... 415
COMF .............................................................................. 450
Comparator ...................................................................... 379
Analog Input Connection Considerations ................ 382
Associated Registers ............................................... 385
Configuration ........................................................... 383
Control ..................................................................... 383
Effects of a Reset .................................................... 385
Enable and Input Selection ...................................... 383
Enable and Output Selection ................................... 383
Interrupts .................................................................. 384
Operation ................................................................. 382
Operation During Sleep ........................................... 385
Registers .................................................................. 379
Response Time ........................................................ 382
Comparator Specifications ............................................... 503
Comparator Voltage Reference ....................................... 387
Accuracy and Error .................................................. 389
Associated Registers ............................................... 389
Configuring .............................................................. 388
Connection Considerations ...................................... 389
Effects of a Reset .................................................... 389
Operation During Sleep ........................................... 389
Compare (CCP Module) .................................................. 263
CCP Pin Configuration ............................................. 263
CCPR4 Register ...................................................... 263
Software Interrupt .................................................... 263
Special Event Trigger .............................................. 263
Timer1/Timer3 Mode Selection ................................ 263
Compare (ECCP Module) ................................................ 274
CCPRx Register ...................................................... 274
Pin Configuration ..................................................... 274
Software Interrupt Mode .......................................... 274
Special Event Trigger .......................................230, 274
Timer1/Timer3 Mode Selection ................................ 274
Computed GOTO ............................................................... 85
Configuration Bits ............................................................ 415
Configuration Mismatch (CM) Reset .................................. 68
Configuration Register Protection .................................... 430
Configuration Registers
Bits and Device IDs ................................................. 416
Mapping Flash Configuration Words ....................... 416
Core Features
Easy Migration ........................................................... 12
Expanded Memory ..................................................... 12
Extended Instruction Set ............................................ 12
nanoWatt XLP Technology ........................................ 11
Oscillator Options and Features ................................ 11
CPFSEQ .......................................................................... 450
CPFSGT .......................................................................... 451
2010 Microchip Technology Inc. Preliminary DS39974A-page 545
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CPFSLT ........................................................................... 451
Crystal Oscillator/Ceramic Resonators .............................. 37
CTMU
Associated Registers ............................................... 413
Calibrating ................................................................ 399
Creating a Delay ...................................................... 408
Effects of a Reset ..................................................... 409
Initialization .............................................................. 399
Measuring Capacitance ........................................... 405
Measuring Time ....................................................... 407
Operation ................................................................. 398
Operation During Idle Mode ..................................... 409
Operation During Sleep Mode ................................. 409
CTMU Current Source Specifications .............................. 504
Customer Change Notification Service ............................ 554
Customer Notification Service .......................................... 554
Customer Support ............................................................ 554
D
Data Addressing Modes ................................................... 101
Comparing Addressing Modes with the
Extended Instruction Set Enabled .................... 105
Direct ........................................................................ 101
Indexed Literal Offset ............................................... 104
BSR .................................................................. 106
Instructions Affected ........................................ 104
Mapping Access Bank ..................................... 106
Indirect ..................................................................... 101
Inherent and Literal .................................................. 101
Data Memory ...................................................................... 88
Access Bank .............................................................. 90
Bank Select Register (BSR) ....................................... 88
Extended Instruction Set .......................................... 104
General Purpose Registers ........................................ 90
Memory Maps
Access Bank Special Function Registers .......... 91
Non-Access Bank Special Function
Registers .................................................... 92
PIC18F47J13 Family Devices ............................ 89
Special Function Registers ........................................ 91
Context Defined SFRs ....................................... 93
DAW ................................................................................. 452
DC Characteristics ................................................... 500, 502
Power-Down and Supply Current ............................ 490
Supply Voltage ......................................................... 489
DCFSNZ ........................................................................... 453
DECF ............................................................................... 452
DECFSZ ........................................................................... 453
Development Support ...................................................... 483
Device Migration to PIC18F47J13 ................................... 541
Device Overview ................................................................ 11
Details on Individual Family Members ....................... 12
Features (28-Pin Devices) ......................................... 13
Features (44-Pin Devices) ......................................... 13
Other Special Features .............................................. 12
Direct Addressing ............................................................. 102
E
Effect on Standard PIC18 Instructions ............................. 480
Electrical Characteristics .................................................. 487
Absolute Maximum Ratings ..................................... 487
DC Characteristics ........................................... 489–502
Enhanced Capture/Compare/PWM (ECCP) .................... 269
Associated Registers ............................................... 289
Capture Mode. See Capture.
Compare Mode. See Compare.
ECCP Mode and Timer Resources ......................... 272
Enhanced PWM Mode ............................................. 275
Auto-Restart .................................................... 284
Auto-Shutdown ................................................ 282
Direction Change in Full-Bridge
Output Mode ............................................ 281
Full-Bridge Application ..................................... 279
Full-Bridge Mode ............................................. 279
Half-Bridge Application .................................... 278
Half-Bridge Application Examples ................... 285
Half-Bridge Mode ............................................. 278
Output Relationships (Active-High
and Active-Low) ....................................... 276
Output Relationships Diagram ......................... 277
Programmable Dead-Band Delay .................... 285
Shoot-Through Current .................................... 285
Start-up Considerations ................................... 282
Outputs and Configuration ....................................... 272
Enhanced Universal Synchronous Asynchronous
Receiver Transmitter (EUSART). See EUSART.
Equations
A/D Acquisition Time ............................................... 374
A/D Minimum Charging Time ................................... 374
Bytes Transmitted for a Given DMABC ................... 306
Calculating Output of the Comparator
Voltage Reference ........................................... 388
Calculating the Minimum Required
Acquisition Time .............................................. 374
Errata ................................................................................... 9
EUSART .......................................................................... 345
Asynchronous Mode ................................................ 355
12-Bit Break Transmit and Receive ................. 360
Associated Registers, Reception ..................... 358
Associated Registers, Transmission ............... 356
Auto-Wake-up on Sync Break ......................... 358
Receiver .......................................................... 357
Setting Up 9-Bit Mode with
Address Detect ........................................ 357
Transmitter ...................................................... 355
Baud Rate Generator
Operation in Power-Managed Mode ................ 349
Baud Rate Generator (BRG) ................................... 349
Associated Registers ....................................... 350
Auto-Baud Rate Detect .................................... 353
Baud Rates, Asynchronous Modes ................. 351
Formulas .......................................................... 349
High Baud Rate Select (BRGH Bit) ................. 349
Sampling .......................................................... 349
Synchronous Master Mode ...................................... 361
Associated Registers, Reception ..................... 364
Associated Registers, Transmission ............... 362
Reception ........................................................ 363
Transmission ................................................... 361
Synchronous Slave Mode ........................................ 365
Associated Registers, Reception ..................... 366
Associated Registers, Transmission ............... 365
Reception ........................................................ 366
Transmission ................................................... 365
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DS39974A-page 546 Preliminary 2010 Microchip Technology Inc.
Extended Instruction Set
ADDFSR .................................................................. 476
ADDULNK ................................................................ 476
CALLW ..................................................................... 477
MOVSF .................................................................... 477
MOVSS .................................................................... 478
PUSHL ..................................................................... 478
SUBFSR ................................................................... 479
SUBULNK ................................................................ 479
External Clock Input ........................................................... 38
F
Fail-Safe Clock Monitor ............................................ 415, 428
Interrupts in Power-Managed Modes ....................... 430
POR or Wake-up From Sleep .................................. 430
WDT During Oscillator Failure ................................. 429
Fast Register Stack (FSR) ................................................. 85
Firmware Instructions ....................................................... 433
Flash Program Memory
Write Sequence ........................................................ 115
Flash Program Memory .................................................... 107
Associated Registers ............................................... 116
Control Registers ..................................................... 108
EECON1 and EECON2 ................................... 108
TABLAT (Table Latch) Register ....................... 110
TBLPTR (Table Pointer) Register .................... 110
Erase Sequence ....................................................... 112
Erasing ..................................................................... 112
Operation During Code-Protect ................................ 116
Reading .................................................................... 111
Table Pointer
Boundaries Based on Operation ...................... 110
Table Pointer Boundaries ......................................... 110
Table Reads and Table Writes ................................. 107
Write Sequence ........................................................ 113
Writing ...................................................................... 113
Unexpected Termination .................................. 116
Write Verify ...................................................... 116
FSCM. See Fail-Safe Clock Monitor.
G
GOTO ............................................................................... 454
H
Hardware Multiplier .......................................................... 117
8 x 8 Multiplication Algorithms .................................. 117
Operation ................................................................. 117
Performance Comparison (table) ............................. 117
High/Low-Voltage Detect ................................................. 391
Applications .............................................................. 395
Associated Registers ............................................... 396
Characteristics ......................................................... 505
Current Consumption ............................................... 393
Effects of a Reset ..................................................... 396
Operation ................................................................. 392
During Sleep .................................................... 396
Setup ........................................................................ 393
Start-up Time ........................................................... 393
Typical Application ................................................... 395
I
I/O Ports ........................................................................... 139
Open-Drain Outputs ................................................. 140
Pin Capabilities ........................................................ 139
TTL Input Buffer Option ............................................ 140
I2C Mode .......................................................................... 310
I2C Mode (MSSP)
Acknowledge Sequence Timing .............................. 338
Associated Registers ............................................... 344
Baud Rate Generator ............................................... 331
Bus Collision
During a Repeated Start Condition .................. 342
During a Stop Condition ................................... 343
Clock Arbitration ...................................................... 333
Clock Stretching ....................................................... 325
10-Bit Slave Receive Mode (SEN = 1) ............ 325
10-Bit Slave Transmit Mode ............................ 325
7-Bit Slave Receive Mode (SEN = 1) .............. 325
7-Bit Slave Transmit Mode .............................. 325
Clock Synchronization and CKP bit ......................... 326
Effects of a Reset .................................................... 339
General Call Address Support ................................. 329
I2C Clock Rate w/BRG ............................................. 332
Master Mode ............................................................ 329
Operation ......................................................... 331
Reception ........................................................ 335
Repeated Start Condition Timing ..................... 334
Start Condition Timing ..................................... 333
Transmission ................................................... 335
Multi-Master Communication, Bus Collision
and Arbitration ................................................. 339
Multi-Master Mode ................................................... 339
Operation ................................................................. 315
Read/Write Bit Information (R/W Bit) ................315, 318
Registers .................................................................. 310
Serial Clock (SCLx Pin) ........................................... 318
Slave Mode .............................................................. 315
Addressing ....................................................... 315
Addressing Masking Modes
5-Bit ......................................................... 316
7-Bit ......................................................... 317
Reception ........................................................ 318
Transmission ................................................... 318
Sleep Operation ....................................................... 339
Stop Condition Timing ............................................. 338
INCF ................................................................................ 454
INCFSZ ............................................................................ 455
In-Circuit Debugger .......................................................... 431
In-Circuit Serial Programming (ICSP) .......................415, 431
Indexed Literal Offset Addressing
and Standard PIC18 Instructions ............................. 480
Indexed Literal Offset Mode ............................................. 480
Indirect Addressing .......................................................... 102
INFSNZ ............................................................................ 455
Initialization Conditions for All Registers .......................71–79
Instruction Cycle ................................................................ 86
Clocking Scheme ....................................................... 86
Flow/Pipelining ........................................................... 86
Instruction Set .................................................................. 433
ADDLW .................................................................... 439
ADDWF .................................................................... 439
ADDWF (Indexed Literal Offset Mode) .................... 481
ADDWFC ................................................................. 440
ANDLW .................................................................... 440
ANDWF .................................................................... 441
BC ............................................................................ 441
BCF .......................................................................... 442
BN ............................................................................ 442
BNC ......................................................................... 443
BNN ......................................................................... 443
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BNOV ....................................................................... 444
BNZ .......................................................................... 444
BOV ......................................................................... 447
BRA .......................................................................... 445
BSF .......................................................................... 445
BSF (Indexed Literal Offset Mode) .......................... 481
BTFSC ..................................................................... 446
BTFSS ..................................................................... 446
BTG .......................................................................... 447
BZ ............................................................................ 448
CALL ........................................................................ 448
CLRF ........................................................................ 449
CLRWDT .................................................................. 449
COMF ...................................................................... 450
CPFSEQ .................................................................. 450
CPFSGT .................................................................. 451
CPFSLT ................................................................... 451
DAW ......................................................................... 452
DCFSNZ .................................................................. 453
DECF ....................................................................... 452
DECFSZ ................................................................... 453
Extended Instructions .............................................. 475
Considerations when Enabling ........................ 480
Syntax .............................................................. 475
Use with MPLAB IDE Tools ............................. 482
General Format ........................................................ 435
GOTO ...................................................................... 454
INCF ......................................................................... 454
INCFSZ .................................................................... 455
INFSNZ .................................................................... 455
IORLW ..................................................................... 456
IORWF ..................................................................... 456
LFSR ........................................................................ 457
MOVF ....................................................................... 457
MOVFF .................................................................... 458
MOVLB .................................................................... 458
MOVLW ................................................................... 459
MOVWF ................................................................... 459
MULLW .................................................................... 460
MULWF .................................................................... 460
NEGF ....................................................................... 461
NOP ......................................................................... 461
Opcode Field Descriptions ....................................... 434
POP ......................................................................... 462
PUSH ....................................................................... 462
RCALL ..................................................................... 463
RESET ..................................................................... 463
RETFIE .................................................................... 464
RETLW .................................................................... 464
RETURN .................................................................. 465
RLCF ........................................................................ 465
RLNCF ..................................................................... 466
RRCF ....................................................................... 466
RRNCF .................................................................... 467
SETF ........................................................................ 467
SETF (Indexed Literal Offset Mode) ........................ 481
SLEEP ..................................................................... 468
Standard Instructions ............................................... 433
SUBFWB .................................................................. 468
SUBLW .................................................................... 469
SUBWF .................................................................... 469
SUBWFB .................................................................. 470
SWAPF .................................................................... 470
TBLRD ..................................................................... 471
TBLWT ..................................................................... 472
TSTFSZ ................................................................... 473
XORLW ................................................................... 473
XORWF ................................................................... 474
INTCON Registers ............................................ 121, 121–123
Inter-Integrated Circuit. See I2C.
Internal Oscillator
Frequency Drift. See INTOSC Frequency Drift.
Internal Oscillator Block ..................................................... 38
Adjustment ................................................................. 39
OSCTUNE Register ................................................... 39
Internal RC Oscillator
Use with WDT .......................................................... 424
Internal Voltage Regulator Specifications ........................ 503
Internet Address .............................................................. 554
Interrupt Sources ............................................................. 415
A/D Conversion Complete ....................................... 373
Capture Complete (CCP) ......................................... 263
Capture Complete (ECCP) ...................................... 273
Compare Complete (CCP) ....................................... 263
Compare Complete (ECCP) .................................... 274
Interrupt-on-Change (RB7:RB4) .............................. 146
TMR0 Overflow ........................................................ 207
TMR1 Overflow ........................................................ 214
TMR2 to PR2 Match (PWM) .................................... 266
TMRx Overflow .................................................221, 230
TMRx to PRx Match ................................................. 234
Interrupts .......................................................................... 119
Control Bits .............................................................. 119
Control Registers. See INTCON Registers.
During, Context Saving ............................................ 138
INTx Pin ................................................................... 138
PORTB, Interrupt-on-Change .................................. 138
RCON Register ........................................................ 137
TMR0 ....................................................................... 138
Interrupts, Flag Bits
Interrupt-on-Change (RB7:RB4) Flag
(RBIF Bit) ......................................................... 146
INTOSC Frequency Drift .................................................... 39
INTOSC, INTRC. See Internal Oscillator Block.
IORLW ............................................................................. 456
IORWF ............................................................................. 456
IPR Registers ............................................................133–136
L
LFSR ................................................................................ 457
Low-Power Modes ............................................................. 47
Clock Transitions and Status Indicators .................... 48
Deep Sleep Mode ...................................................... 55
and RTCC Peripheral ........................................ 57
Brown-out Reset (DSBOR) ................................ 57
Fault Detection .................................................. 57
Preparation ........................................................ 55
Registers ........................................................... 58
Typical Sequence .............................................. 57
Wake-up Sources .............................................. 56
Watchdog Timer (DSWDT) ................................ 56
Exiting Idle and Sleep Modes .................................... 54
By Interrupt ........................................................ 54
By Reset ............................................................ 54
By WDT Time-out .............................................. 54
Without an Oscillator Start-up Delay ................. 55
Idle Modes ................................................................. 52
PRI_IDLE ........................................................... 52
RC_IDLE ........................................................... 54
SEC_IDLE ......................................................... 52
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DS39974A-page 548 Preliminary 2010 Microchip Technology Inc.
Multiple Sleep Commands ......................................... 48
Run Modes ................................................................. 49
PRI_RUN ........................................................... 49
RC_RUN ............................................................ 50
SEC_RUN .......................................................... 49
Sleep Mode ................................................................ 51
Summary (table) ......................................................... 48
Ultra Low-Power Wake-up ......................................... 61
M
Master Clear (MCLR) ......................................................... 67
Master Synchronous Serial Port (MSSP). See MSSP.
Memory Organization ......................................................... 81
Data Memory .............................................................. 88
Program Memory ....................................................... 81
Return Address Stack ................................................ 83
Memory Programming Requirements .............................. 502
Microchip Internet Web Site ............................................. 554
MOVF ............................................................................... 457
MOVFF ............................................................................. 458
MOVLB ............................................................................. 458
MOVLW ............................................................................ 459
MOVSF ............................................................................ 477
MOVSS ............................................................................ 478
MOVWF ........................................................................... 459
MPLAB ASM30 Assembler, Linker, Librarian .................. 484
MPLAB Integrated Development Environment
Software ................................................................... 483
MPLAB PM3 Device Programmer .................................... 486
MPLAB REAL ICE In-Circuit Emulator System ................ 485
MPLINK Object Linker/MPLIB Object Librarian ............... 484
MSSP
ACK Pulse ........................................................ 315, 318
I2C Mode. See I2C Mode.
Module Overview ..................................................... 291
SPI Master/Slave Connection .................................. 296
TMR4/6/8 Output for Clock Shift .............................. 234
MULLW ............................................................................ 460
MULWF ............................................................................ 460
N
NEGF ............................................................................... 461
NOP ................................................................................. 461
Notable Differences Between PIC18F47J13
and PIC18F46J11 Families ...................................... 541
O
Oscillator Configurations .................................................... 35
Internal Oscillator Block ............................................. 38
Oscillator Control ........................................................ 35
Oscillator Modes ........................................................ 35
Oscillator Types ......................................................... 35
Switching .................................................................... 41
Transitions .................................................................. 42
Oscillator Selection .......................................................... 415
Oscillator Start-up Timer (OST) ......................................... 45
Oscillator, Timer1 ............................................. 209, 213, 226
Oscillator, Timer3 ............................................................. 221
P
See Enhanced Capture/Compare/PWM (ECCP).
Packaging
Details ...................................................................... 531
Marking .................................................................... 529
Parallel Master Port (PMP) .............................................. 179
Application Examples .............................................. 201
Associated Registers ............................................... 203
Data Registers ......................................................... 186
Master Port Modes .................................................. 193
Module Registers ..................................................... 180
Slave Port Modes .................................................... 188
Peripheral Module Disable (PMD) ..................................... 63
Peripheral Pin Select (PPS) ............................................. 158
Peripheral Pin Select Registers ................................163–178
PIE Registers ............................................................129–132
Pin Functions
AVDD1 ........................................................................ 29
AVDD2 ........................................................................ 29
AVSS1 ........................................................................ 29
MCLR ....................................................................16, 22
OSC1/CLKI/RA7 ...................................................16, 22
OSC2/CLKO/RA6 .................................................16, 22
RA0/AN0/C1INA/ULPWU/PMA6/RP0 ....................... 23
RA0/AN0/C1INA/ULPWU/RP0 .................................. 17
RA1/AN1/C2INA/VBG ................................................. 23
RA1/AN1/C2INA/VBG/CTDIN/RP1 ............................. 17
RA2/AN2/C2INB/C1IND/C3INB/VREF-/CVREF ......17, 23
RA3/AN3/C1INB/VREF+ ........................................17, 23
RA5/AN4/C1INC/SS1/HLVDIN/RP2 .....................17, 23
RA6 .......................................................................17, 23
RA7 .......................................................................17, 23
RB0/AN12/C3IND/INT0/RP3 ................................18, 24
RB1/AN10/C3INC/PMBE/RTCCS/RP4 ..................... 24
RB1/AN10/C3INC/RTCC/RP4 ................................... 18
RB2/AN8/C2INC/CTED1/PMA3/REFO/RP5 ............. 24
RB2/AN8/C2INC/CTED1/REFO/RP5 ........................ 18
RB3/AN9/C3INA/CTED2/PMA2/RP6 ......................... 24
RB3/AN9/C3INA/CTED2/RP6 ................................... 18
RB4/CCP4/KBI0/SCL2/RP7 ...................................... 19
RB4/CCP4/PMA1/KBI0/RP7 ...................................... 25
RB5/CCP5/KBI1/SDA2/RP8 ...................................... 19
RB5/CCP5/PMA0/KBI1/RP8 ...................................... 25
RB6/CCP6/KBI2/PGC/RP9 ...................................19, 25
RB7/CCP7/KBI3/PGD/RP10 .................................19, 25
RC0/T1OSO/T1CKI/RP11 ....................................20, 26
RC1/CCP8/T1OSI/RP12 .......................................20, 26
RC2/AN11/C2IND/CTPLS/RP13 ..........................20, 26
RC3/SCK1/SCL1/RP14 ........................................20, 26
RC4/SDI1/SDA1/RP15 .........................................20, 26
RC5/SDO1/RP16 ..................................................20, 26
RC6/CCP9/PMA5/TX1/CK1/RP17 ............................. 27
RC6/CCP9/TX1/CK1/RP17 ....................................... 20
RC7/CCP10/PMA4/RX1/DT1/RP18 .......................... 27
RC7/CCP10/RX1/DT1/RP18 ..................................... 20
RD0/PMD0/SCL2 ....................................................... 28
RD1/PMD1/SDA2 ...................................................... 28
RD2/PMD2/RP19 ....................................................... 28
RD3/PMD3/RP20 ....................................................... 28
RD4/PMD4/RP21 ....................................................... 28
RD5/PMD5/RP22 ....................................................... 28
RD6/PMD6/RP23 ....................................................... 28
RD7/PMD7/RP24 ....................................................... 28
RE0/AN5/PMRD ........................................................ 29
RE1/AN6/PMWR ....................................................... 29
RE2/AN7/PMCS ........................................................ 29
VDD ............................................................................ 21
VDD1 .......................................................................... 29
VDD2 .......................................................................... 29
VDDCORE/VCAP ......................................................29, 21
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PIC18F47J13 FAMILY
VSS1 ..................................................................... 21, 29
VSS2 ..................................................................... 21, 29
Pinout I/O Descriptions
PIC18F2XJ13 (28-Pin) ............................................... 16
PIC18F4XJ13 (44-Pin) ............................................... 22
PIR Registers ................................................................... 124
PLL Frequency Multiplier ................................................... 38
POP .................................................................................. 462
POR. See Power-on Reset.
PORTA
Additional Pin Functions
Ultra Low-Power Wake-up ................................. 61
Associated Registers ............................................... 145
LATA Register .......................................................... 143
PORTA Register ...................................................... 143
TRISA Register ........................................................ 143
PORTB
Associated Registers ............................................... 149
LATB Register .......................................................... 146
PORTB Register ...................................................... 146
RB7:RB4 Interrupt-on-Change Flag (RBIF Bit) ........ 146
TRISB Register ........................................................ 146
PORTC
Associated Registers ............................................... 152
LATC Register ......................................................... 150
PORTC Register ...................................................... 150
TRISC Register ........................................................ 150
PORTD
Associated Registers ............................................... 155
LATD Register ......................................................... 153
PORTD Register ...................................................... 153
TRISD Register ........................................................ 153
PORTE
Associated Registers ............................................... 157
LATE Register .......................................................... 156
PORTE Register ...................................................... 156
TRISE Register ........................................................ 156
Power-Managed Modes
and EUSART Operation ........................................... 349
and PWM Operation ................................................ 289
and SPI Operation ................................................... 300
Clock Sources ............................................................ 47
Entering ...................................................................... 47
Selecting .................................................................... 47
Power-on Reset (POR) ...................................................... 67
Power-up Delays ................................................................ 45
Power-up Timer (PWRT) .............................................. 45, 68
Time-out Sequence .................................................... 68
Prescaler, Capture ........................................................... 263
Prescaler, Timer0 ............................................................. 207
Prescaler, Timer2 ............................................................. 267
PRI_IDLE Mode ................................................................. 52
PRI_RUN Mode ................................................................. 49
Product Identification System ........................................... 556
Program Counter ................................................................ 83
PCL, PCH and PCU Registers ................................... 83
PCLATH and PCLATU Registers .............................. 83
Program Memory
ALU
STATUS ........................................................... 100
Extended Instruction Set .......................................... 103
Flash Configuration Words ........................................ 82
Hard Memory Vectors ................................................ 82
Instructions ................................................................ 87
Two-Word .......................................................... 87
Interrupt Vector .......................................................... 82
Look-up Tables .......................................................... 85
Memory Maps ............................................................ 81
Hard Vectors and Configuration Words ............. 82
Reset Vector .............................................................. 82
Program Verification and Code Protection ...................... 430
Programming, Device Instructions ................................... 433
Pulse Steering ................................................................. 286
Pulse-Width Modulation. See PWM (CCP Module).
PUSH ............................................................................... 462
PUSH and POP Instructions .............................................. 84
PUSHL ............................................................................. 478
PWM (CCP Module)
Associated Registers ............................................... 268
Duty Cycle ............................................................... 267
Example Frequencies/Resolutions .......................... 267
Period ...................................................................... 266
Setup for PWM Operation ........................................ 267
TMR2 to PR2 Match ................................................ 266
PWM (ECCP Module)
Effects of a Reset .................................................... 289
Operation in Power-Managed Modes ...................... 289
Operation with Fail-Safe Clock Monitor ................... 289
Pulse Steering ......................................................... 286
Steering Synchronization ......................................... 288
PWM Mode. See Enhanced Capture/Compare/PWM.
Q
Q Clock ............................................................................ 267
R
RAM. See Data Memory.
RBIF Bit ........................................................................... 146
RC_IDLE Mode .................................................................. 54
RC_RUN Mode .................................................................. 50
RCALL ............................................................................. 463
RCON Register
Bit Status During Initialization .................................... 70
Reader Response ............................................................ 555
Real-Time Clock and Calendar (RTCC) .......................... 237
Operation ................................................................. 249
Registers ................................................................. 238
Reference Clock Output .................................................... 44
Register File ....................................................................... 90
Registers
ADCON0 (A/D Control 0) ......................................... 368
ADCON1 (A/D Control 1) ......................................... 369
ADCTRIG (A/D Trigger) ........................................... 376
ALRMCFG (Alarm Configuration) ............................ 241
ALRMDAY (Alarm Day Value) ................................. 246
ALRMHR (Alarm Hours Value) ................................ 247
ALRMMIN (Alarm Minutes Value) ............................ 248
ALRMMNTH (Alarm Month Value) .......................... 246
ALRMRPT (Alarm Repeat Counter) ........................ 242
ALRMSEC (Alarm Seconds Value) ......................... 248
ALRMWD (Alarm Weekday Value) .......................... 247
ANCON0 (A/D Port Configuration 0) ....................... 371
ANCON1 (A/D Port Configuration 1) ....................... 371
Associated with Comparator .................................... 379
Associated with Program Flash Memory ................. 116
BAUDCONx (Baud Rate Control) ............................ 348
PIC18F47J13 FAMILY
DS39974A-page 550 Preliminary 2010 Microchip Technology Inc.
CCPRxH (CCP4-10 Period High Byte 4) ................. 260
CCPRxL (CCP4-10 Period Low Byte 4) ................... 260
CCPTMRS (CCP4-10 Timer Select 1) ..................... 258
CCPTMRS0 (ECCP1/2/3 Timer Select 0) ................ 271
CCPTMRS2 (CCP4-10 Timer Select 2) ................... 259
CCPxCON (CCPx, CCP4-10 Control) ...................... 257
CCPxCON (ECCP1/2/3 Control) .............................. 270
CMSTAT (Comparator Status) ................................. 381
CMxCON (Comparator Control 1/2/3) ...................... 380
CONFIG1H (Configuration 1 High) .......................... 418
CONFIG1L (Configuration 1 Low) ............................ 417
CONFIG2H (Configuration 2 High) .......................... 419
CONFIG2L (Configuration 2 Low) ............................ 418
CONFIG3H (Configuration 3 High) .................. 370, 421
CONFIG3L (Configuration 3 Low) ............................ 420
CONFIG4H (Configuration 4 High) .......................... 422
CONFIG4L (Configuration 4 Low) ............................ 421
CTMUCONH (CTMU Control High) ......................... 410
CTMUCONL (CTMU Control Low) ........................... 411
CTMUICON (CTMU Current Control) ...................... 412
CVRCON (Comparator Voltage
Reference Control) ........................................... 388
DAY (Day Value) ...................................................... 244
DEVID1 (Device ID 1) .............................................. 422
DEVID2 (Device ID 2) .............................................. 423
DMACON1 (DMA Control 1) .................................... 304
DMACON2 (DMA Control 2) .................................... 305
DSCONH (Deep Sleep Control High Byte) ................ 58
DSCONL (Deep Sleep Control Low Byte) .................. 58
DSGPR0 (Deep Sleep Persistent
General Purpose 0) ............................................ 59
DSGPR1 (Deep Sleep Persistent
General Purpose 1) ............................................ 59
DSWAKEH (Deep Sleep Wake High Byte) ................ 59
DSWAKEL (Deep Sleep Wake Low Byte) ................. 60
ECCPxAS (ECCP1/2/3 Auto-Shutdown
Control) ............................................................ 283
ECCPxDEL (ECCP1/2/3 Enhanced PWM
Control) ............................................................ 286
EECON1 (EEPROM Control 1) ................................ 109
HLVDCON (High/Low-Voltage Detect Control) ........ 391
HOURS (Hours Value) ............................................. 245
I2C Mode (MSSP) .................................................... 310
INTCON (Interrupt Control) ...................................... 121
INTCON2 (Interrupt Control 2) ................................. 122
INTCON3 (Interrupt Control 3) ................................. 123
IPR1 (Peripheral Interrupt Priority 1) ........................ 133
IPR2 (Peripheral Interrupt Priority 2) ........................ 134
IPR3 (Peripheral Interrupt Priority 3) ........................ 135
IPR4 (Peripheral Interrupt Priority 4) ........................ 136
IPR5 (Peripheral Interrupt Priority 5) ........................ 136
MINUTES (Minutes Value) ....................................... 245
MONTH (Month Value) ............................................ 243
ODCON1 (Peripheral Open-Drain Control 1) ........... 141
ODCON2 (Peripheral Open-Drain Control 2) ........... 142
ODCON3 (Peripheral Open-Drain
Control 3) ................................................. 142, 412
OSCCON (Oscillator Control) .................................... 42
OSCCON2 (Oscillator Control 2) ....................... 43, 224
OSCTUNE (Oscillator Tuning) ................................... 40
PADCFG1 (Pad Configuration 1) ............................. 240
PADCFG1 (Pad Configuration Control 1) ................ 143
Parallel Master Port .................................................. 180
PIE1 (Peripheral Interrupt Enable 1) ........................ 129
PIE2 (Peripheral Interrupt Enable 2) ........................ 130
PIE3 (Peripheral Interrupt Enable 3) ........................ 131
PIE4 (Peripheral Interrupt Enable 4) ........................ 132
PIE5 (Peripheral Interrupt Enable 5) ........................ 132
PIR1 (Peripheral Interrupt Request (Flag) 1) ........... 124
PIR2 (Peripheral Interrupt Request (Flag) 2) ........... 125
PIR3 (Peripheral Interrupt Request (Flag) 3) ........... 126
PMADDRH (Parallel Port Address High Byte,
Master Modes Only) ........................................ 187
PMADDRL (Parallel Port Address Low Byte,
Master Modes Only) ........................................ 187
PMCONH (Parallel Port Control High Byte) ............. 180
PMCONL (Parallel Port Control Low Byte) .............. 181
PMEH (Parallel Port Enable High Byte) ................... 184
PMEL (Parallel Port Enable Low Byte) .................... 184
PMMODEH (Parallel Port Mode High Byte) ............ 182
PMMODEL (Parallel Port Mode Low Byte) .............. 183
PMSTATH (Parallel Port Status High Byte) ............. 185
PMSTATL (Parallel Port Status Low Byte) .............. 185
PPSCON (Peripheral Pin Select Input 0) ................. 163
PSTRxCON (Pulse Steering Control) ...................... 287
RCON (Reset Control) ........................................66, 137
RCSTAx (Receive Status and Control) .................... 347
REF0CON (Reference Oscillator Control) ................. 44
Reserved ................................................................. 243
RPINR1 (Peripheral Pin Select Input 1) ................... 163
RPINR12 (Peripheral Pin Select Input 12) ............... 166
RPINR13 (Peripheral Pin Select Input 13) ............... 166
RPINR14 (Peripheral Pin Select Input 14) ............... 166
RPINR15 (Peripheral Pin Select Input 15) ............... 167
RPINR16 (Peripheral Pin Select Input 16) ............... 167
RPINR17 (Peripheral Pin Select Input 17) ............... 167
RPINR2 (Peripheral Pin Select Input 2) ................... 163
RPINR21 (Peripheral Pin Select Input 21) ............... 168
RPINR22 (Peripheral Pin Select Input 22) ............... 168
RPINR23 (Peripheral Pin Select Input 23) ............... 168
RPINR24 (Peripheral Pin Select Input 24) ............... 169
RPINR3 (Peripheral Pin Select Input 3) ................... 164
RPINR4 (Peripheral Pin Select Input 4) ................... 164
RPINR6 (Peripheral Pin Select Input 6) ................... 164
RPINR7 (Peripheral Pin Select Input 7) ................... 165
RPINR8 (Peripheral Pin Select Input 8) ................... 165
RPINR9 (Peripheral Pin Select Input 9) ................... 165
RPOR0 (Peripheral Pin Select Output 0) ................. 170
RPOR1 (Peripheral Pin Select Output 1) ................. 170
RPOR10 (Peripheral Pin Select Output 10) ............. 173
RPOR11 (Peripheral Pin Select Output 11) ............. 173
RPOR12 (Peripheral Pin Select Output 12) ............. 174
RPOR13 (Peripheral Pin Select Output 13) ............. 174
RPOR14 (Peripheral Pin Select Output 14) ............. 174
RPOR15 (Peripheral Pin Select Output 15) ............. 175
RPOR16 (Peripheral Pin Select Output 16) ............. 175
RPOR17 (Peripheral Pin Select Output 17) ............. 175
RPOR18 (Peripheral Pin Select Output 18) ............. 176
RPOR19 (Peripheral Pin Select Output 19) ............. 176
RPOR2 (Peripheral Pin Select Output 2) ................. 170
RPOR20 (Peripheral Pin Select Output 20) ............. 176
RPOR21 (Peripheral Pin Select Output 21) ............. 177
RPOR22 (Peripheral Pin Select Output 22) ............. 177
RPOR23 (Peripheral Pin Select Output 23) ............. 177
RPOR24 (Peripheral Pin Select Output 24) ............. 178
RPOR3 (Peripheral Pin Select Output 3) ................. 171
RPOR4 (Peripheral Pin Select Output 4) ................. 171
RPOR5 (Peripheral Pin Select Output 5) ................. 171
RPOR6 (Peripheral Pin Select Output 6) ................. 172
RPOR7 (Peripheral Pin Select Output 7) ................. 172
2010 Microchip Technology Inc. Preliminary DS39974A-page 551
PIC18F47J13 FAMILY
RPOR8 (Peripheral Pin Select Output 8) ................. 172
RPOR9 (Peripheral Pin Select Output 9) ................. 173
RTCCAL (RTCC Calibration) ................................... 240
RTCCFG (RTCC Configuration) .............................. 239
SECONDS (Seconds Value) .................................... 245
SPI Mode (MSSP) .................................................... 293
SSPxCON1 (MSSPx Control 1, I2C Mode) .............. 312
SSPxCON1 (MSSPx Control 1, SPI Mode) ............. 294
SSPxCON2 (MSSPx Control 2,
I2C Master Mode) ............................................. 313
SSPxCON2 (MSSPx Control 2,
I2C Slave Mode) ............................................... 314
SSPxMSK (I2C Slave Address Mask) ...................... 314
SSPxSTAT (MSSPx Status, I2C Mode) ................... 311
SSPxSTAT (MSSPx Status, SPI Mode) .................. 293
STATUS ................................................................... 100
STKPTR (Stack Pointer) ............................................ 84
T0CON (Timer0 Control) .......................................... 205
T1CON (Timer1 Control) .......................................... 209
T1GCON (Timer1 Gate Control) .............................. 210
T2CON (Timer2 Control) .......................................... 219
TxCON (Timer3/5 Control) ....................................... 222
TxCON (Timer4/6/8 Control) .................................... 234
TxGCON (Timer3/5 Gate Control) ........................... 223
TXSTAx (Transmit Status and Control) ................... 346
WDTCON (Watchdog Timer Control) ....................... 425
WKDY (Weekday Value) .......................................... 244
YEAR (Year Value) .................................................. 243
RESET ............................................................................. 463
Reset .................................................................................. 65
Brown-out Reset ........................................................ 67
Brown-out Reset (BOR) ............................................. 65
Configuration Mismatch (CM) .................................... 65
Configuration Mismatch Reset ................................... 68
Deep Sleep ................................................................ 65
Fast Register Stack (FSR) ......................................... 85
MCLR ......................................................................... 67
MCLR Reset, During Power-Managed Modes ........... 65
MCLR Reset, Normal Operation ................................ 65
Power-on Reset ......................................................... 67
Power-on Reset (POR) .............................................. 65
Power-up Timer ......................................................... 68
RESET Instruction ..................................................... 65
Stack Full Reset ......................................................... 65
Stack Underflow Reset .............................................. 65
State of Registers ...................................................... 70
Watchdog Timer (WDT) Reset ................................... 65
Resets .............................................................................. 415
Brown-out Reset (BOR) ........................................... 415
Oscillator Start-up Timer (OST) ............................... 415
Power-on Reset (POR) ............................................ 415
Power-up Timer (PWRT) ......................................... 415
RETFIE ............................................................................ 464
RETLW ............................................................................. 464
RETURN .......................................................................... 465
Return Address Stack ........................................................ 83
Associated Registers ................................................. 83
Revision History ............................................................... 541
RLCF ................................................................................ 465
RLNCF ............................................................................. 466
RRCF ............................................................................... 466
RRNCF ............................................................................. 467
RTCC
Alarm ....................................................................... 253
Configuring ...................................................... 253
Interrupt ........................................................... 254
Mask Settings .................................................. 253
Alarm Value Register Mappings (ALRMVAL) .......... 246
Control Registers ..................................................... 239
Control/Value Register Maps ................................... 255
Low-Power Modes ................................................... 254
Operation
Calibration ....................................................... 252
Clock Source ................................................... 250
Digit Carry Rules ............................................. 250
General Functionality ....................................... 251
Leap Year ........................................................ 251
Register Mapping ............................................ 251
ALRMVAL ................................................ 252
RTCVAL .................................................. 252
Safety Window for Register Reads
and Writes ............................................... 251
Write Lock ........................................................ 251
Peripheral Module Disable (PMD) Register ............. 255
Register Interface .................................................... 249
Reset ....................................................................... 254
Device .............................................................. 254
Power-on Reset (POR) .................................... 254
Value Register Mappings (RTCVAL) ....................... 243
RTCEN Bit Write .............................................................. 249
S
SCKx ................................................................................ 292
SDIx ................................................................................. 292
SDOx ............................................................................... 292
SEC_IDLE Mode ............................................................... 52
SEC_RUN Mode ................................................................ 49
Serial Clock, SCKx .......................................................... 292
Serial Data In (SDIx) ........................................................ 292
Serial Data Out (SDOx) ................................................... 292
Serial Peripheral Interface. See SPI Mode.
SETF ................................................................................ 467
Shoot-Through Current .................................................... 285
Slave Select (SSx) ........................................................... 292
SLEEP ............................................................................. 468
Software Simulator (MPLAB SIM) ................................... 485
Special Event Trigger. See Compare (CCP Module).
Special Event Trigger. See Compare (ECCP Mode).
Special Features of the CPU ........................................... 415
SPI Mode (MSSP) ........................................................... 292
Associated Registers ............................................... 301
Bus Mode Compatibility ........................................... 300
Clock Speed, Interactions ........................................ 300
DMA Module ............................................................ 302
I/O Pin Considerations ..................................... 302
Idle, Sleep Considerations ............................... 302
RAM to RAM Copy .......................................... 302
Registers ......................................................... 302
Effects of a Reset .................................................... 300
Enabling SPI I/O ...................................................... 296
Master Mode ............................................................ 297
Master/Slave Connection ......................................... 296
Operation ................................................................. 295
Open-Drain Output Option ............................... 295
PIC18F47J13 FAMILY
DS39974A-page 552 Preliminary 2010 Microchip Technology Inc.
Operation in Power-Managed Modes ...................... 300
Registers .................................................................. 293
Serial Clock .............................................................. 292
Serial Data In ........................................................... 292
Serial Data Out ......................................................... 292
Slave Mode .............................................................. 298
Slave Select ............................................................. 292
Slave Select Synchronization ................................... 298
SPI Clock ................................................................. 297
SSPxBUF Register ................................................... 297
SSPxSR Register ..................................................... 297
Typical Connection ................................................... 296
SSPOV ............................................................................. 335
SSPOV Status Flag .......................................................... 335
SSPxSTAT Register
R/W Bit ............................................................. 315, 318
SSx ................................................................................... 292
Stack Full/Underflow Resets .............................................. 85
SUBFSR ........................................................................... 479
SUBFWB .......................................................................... 468
SUBLW ............................................................................ 469
SUBULNK ........................................................................ 479
SUBWF ............................................................................ 469
SUBWFB .......................................................................... 470
SWAPF ............................................................................ 470
T
Table Pointer Operations (table) ...................................... 110
Table Reads/Table Writes .................................................. 85
TAD ................................................................................... 375
TBLRD ............................................................................. 471
TBLWT ............................................................................. 472
Timer0 .............................................................................. 205
Associated Registers ............................................... 207
Operation ................................................................. 206
Overflow Interrupt ..................................................... 207
Prescaler .................................................................. 207
Switching Assignment ...................................... 207
Prescaler Assignment (PSA Bit) .............................. 207
Prescaler Select (T0PS2:T0PS0 Bits) ...................... 207
Reads and Writes in 16-Bit Mode ............................ 206
Source Edge Select (T0SE Bit) ................................ 206
Source Select (T0CS Bit) ......................................... 206
Timer1 .............................................................................. 209
16-Bit Read/Write Mode ........................................... 213
Associated Registers ............................................... 218
Clock Source Selection ............................................ 211
Gate ......................................................................... 215
Interrupt .................................................................... 214
Operation ................................................................. 211
Oscillator .......................................................... 209, 213
Layout Considerations ..................................... 214
Resetting, Using the ECCP
Special Event Trigger ....................................... 215
TMR1H Register ...................................................... 209
TMR1L Register ....................................................... 209
Use as a Clock Source ............................................. 214
Timer2 .............................................................................. 219
Associated Registers ............................................... 220
Interrupt .................................................................... 220
Operation ................................................................. 219
Output ...................................................................... 220
PR2 Register ............................................................ 266
TMR2 to PR2 Match Interrupt .................................. 266
Timer3/5 ........................................................................... 221
16-Bit Read/Write Mode .......................................... 226
Associated Registers ............................................... 231
Gate ......................................................................... 226
Operation ................................................................. 225
Oscillator ...........................................................221, 226
Overflow Interrupt .............................................221, 230
Special Event Trigger (ECCP) ................................. 230
TMRxH Register ...................................................... 221
TMRxL Register ....................................................... 221
Timer4
TMRx to PRx Match Interrupt .................................. 234
Timer4/6/8 ........................................................................ 233
Associated Registers ............................................... 235
Interrupt ................................................................... 234
MSSP Clock Shift .................................................... 234
Operation ................................................................. 233
Output ...................................................................... 234
Postscaler. See Postscaler, Timer4/6/8.
Prescaler. See Prescaler, Timer4/6/8.
PRx Register ............................................................ 233
TMRx Register ......................................................... 233
TMRx to PRx Match Interrupt .................................. 233
Timing Diagrams
A/D Conversion ........................................................ 527
Asynchronous Reception ......................................... 358
Asynchronous Transmission .................................... 356
Asynchronous Transmission (Back-to-Back) ........... 356
Automatic Baud Rate Calculation ............................ 354
Auto-Wake-up Bit (WUE) During
Normal Operation ............................................ 359
Auto-Wake-up Bit (WUE) During Sleep ................... 359
Baud Rate Generator with Clock Arbitration ............ 333
BRG Overflow Sequence ......................................... 354
BRG Reset Due to SDAx Arbitration During
Start Condition ................................................. 341
Bus Collision During a Repeated
Start Condition (Case 1) .................................. 342
Bus Collision During a Repeated
Start Condition (Case 2) .................................. 342
Bus Collision During a Start
Condition (SCLx = 0) ....................................... 341
Bus Collision During a Stop Condition (Case 1) ...... 343
Bus Collision During a Stop Condition (Case 2) ...... 343
Bus Collision During Start
Condition (SDAx Only) ..................................... 340
Bus Collision for Transmit and Acknowledge .......... 339
CLKO and I/O .......................................................... 510
Clock Synchronization ............................................. 326
Clock/Instruction Cycle .............................................. 86
Enhanced Capture/Compare/PWM ......................... 514
Enhanced PWM Output (Active-High) ..................... 276
Enhanced PWM Output (Active-Low) ...................... 277
EUSARTx Synchronous Receive (Master/Slave) .... 526
EUSARTx Synchronous Transmission
(Master/Slave) ................................................. 526
Example SPI Master Mode (CKE = 0) ..................... 518
Example SPI Master Mode (CKE = 1) ..................... 519
Example SPI Slave Mode (CKE = 0) ....................... 520
Example SPI Slave Mode (CKE = 1) ....................... 521
External Clock .......................................................... 508
Fail-Safe Clock Monitor ........................................... 429
First Start Bit ............................................................ 333
Full-Bridge PWM Output .......................................... 280
Half-Bridge PWM Output ..................................278, 285
2010 Microchip Technology Inc. Preliminary DS39974A-page 553
PIC18F47J13 FAMILY
High/Low-Voltage Detect Characteristics ................ 505
High-Voltage Detect (VDIRMAG = 1) ....................... 395
I22C Bus Data .......................................................... 522
I2C Acknowledge Sequence .................................... 338
I2C Bus Start/Stop Bits ............................................. 522
I2C Master Mode (7 or 10-Bit Transmission) ............ 336
I2C Master Mode (7-Bit Reception) .......................... 337
I2C Slave Mode (10-Bit Reception,
SEN = 0, ADMSK = 01001) ............................. 322
I2C Slave Mode (10-Bit Reception, SEN = 0) .......... 323
I2C Slave Mode (10-Bit Reception, SEN = 1) .......... 328
I2C Slave Mode (10-Bit Transmission) ..................... 324
I2C Slave Mode (7-Bit Reception,
SEN = 0, ADMSK = 01011) ............................. 320
I2C Slave Mode (7-Bit Reception, SEN = 0) ............ 319
I2C Slave Mode (7-Bit Reception, SEN = 1) ............ 327
I2C Slave Mode (7-Bit Transmission) ....................... 321
I2C Slave Mode General Call Address
Sequence (7 or 10-Bit Addressing Mode) ........ 329
I2C Stop Condition Receive or Transmit Mode ........ 338
Low-Voltage Detect (VDIRMAG = 0) ....................... 394
MSSPx I2C Bus Data ............................................... 524
MSSPx I2C Bus Start/Stop Bits ................................ 524
Parallel Master Port Read ........................................ 515
Parallel Master Port Write ........................................ 516
Parallel Slave Port Read .................................. 189, 191
Parallel Slave Port Write .................................. 189, 192
PWM Auto-Shutdown with Auto-Restart Enabled .... 284
PWM Auto-Shutdown with Firmware Restart ........... 284
PWM Direction Change ........................................... 281
PWM Direction Change at Near 100%
Duty Cycle ........................................................ 282
PWM Output ............................................................ 266
Read and Write, 8-Bit Data, Demultiplexed
Address ............................................................ 196
Read, 16-Bit Data, Demultiplexed Address ............. 199
Read, 16-Bit Multiplexed Data, Fully Multiplexed
16-Bit Address ................................................. 200
Read, 16-Bit Multiplexed Data, Partially
Multiplexed Address ......................................... 199
Read, 8-Bit Data, Fully Multiplexed
16-Bit Address ................................................. 198
Read, 8-Bit Data, Partially Multiplexed Address ...... 196
Read, 8-Bit Data, Partially Multiplexed
Address, Enable Strobe ................................... 197
Read, 8-Bit Data, Wait States Enabled,
Partially Multiplexed Address ........................... 196
Repeated Start Condition ......................................... 334
Reset, Watchdog Timer (WDT), Oscillator Start-up
Timer (OST) and Power-up Timer (PWRT) ..... 511
Send Break Character Sequence ............................ 360
Slave Synchronization ............................................. 298
Slow Rise Time (MCLR Tied to VDD,
VDD Rise > TPWRT) ............................................ 69
SPI Mode (Master Mode) ......................................... 297
SPI Mode (Slave Mode, CKE = 0) ........................... 299
SPI Mode (Slave Mode, CKE = 1) ........................... 299
Steering Event at Beginning of Instruction
(STRSYNC = 1) ............................................... 288
Steering Event at End of Instruction
(STRSYNC = 0) ............................................... 288
Synchronous Reception (Master Mode, SREN) ...... 363
Synchronous Transmission ...................................... 361
Synchronous Transmission (Through TXEN) .......... 362
Time-out Sequence on Power-up (MCLR Not
Tied to VDD), Case 1 ......................................... 69
Time-out Sequence on Power-up (MCLR Not
Tied to VDD), Case 2 ......................................... 69
Time-out Sequence on Power-up (MCLR
Tied to VDD, VDD Rise < TPWRT) ....................... 68
Timer Pulse Generation ........................................... 254
Timer0 and Timer1 External Clock .......................... 512
Timer1 Gate Count Enable Mode ............................ 215
Timer1 Gate Single Pulse Mode .............................. 217
Timer1 Gate Single Pulse/Toggle
Combined Mode .............................................. 218
Timer1 Gate Toggle Mode ....................................... 216
Timer3/5 Gate Count Enable Mode ......................... 226
Timer3/5 Gate Single Pulse Mode ........................... 228
Timer3/5 Gate Single Pulse/Toggle
Combined Mode .............................................. 229
Timer3/5 Gate Toggle Mode .................................... 227
Transition for Entry to Idle Mode ................................ 53
Transition for Entry to SEC_RUN Mode .................... 49
Transition for Entry to Sleep Mode ............................ 51
Transition for Two-Speed Start-up
(INTRC to HSPLL) ........................................... 428
Transition for Wake From Idle to Run Mode .............. 53
Transition for Wake From Sleep (HSPLL) ................. 51
Transition From RC_RUN Mode to
PRI_RUN Mode ................................................. 50
Transition From SEC_RUN Mode to
PRI_RUN Mode (HSPLL) .................................. 49
Transition to RC_RUN Mode ..................................... 50
Write, 16-Bit Data, Demultiplexed Address ............. 199
Write, 16-Bit Multiplexed Data, Fully
Multiplexed 16-Bit Address .............................. 200
Write, 16-Bit Multiplexed Data, Partially
Multiplexed Address ........................................ 200
Write, 8-Bit Data, Fully Multiplexed
16-Bit Address ................................................. 198
Write, 8-Bit Data, Partially Multiplexed Address ...... 197
Write, 8-Bit Data, Partially Multiplexed
Address, Enable Strobe ................................... 198
Write, 8-Bit Data, Wait States Enabled,
Partially Multiplexed Address .......................... 197
Timing Diagrams and Specifications
4x PLL Clock ........................................................... 509
96 MHz PLL Clock ................................................... 509
CLKO and I/O Requirements ................................... 510
Enhanced Capture/Compare/PWM
Requirements .................................................. 514
EUSARTx Synchronous Receive Requirements ..... 526
EUSARTx Synchronous Transmission
Requirements .................................................. 526
Example SPI Mode Requirements
(Master Mode, CKE = 0) .................................. 518
Example SPI Mode Requirements
(Master Mode, CKE = 1) .................................. 519
Example SPI Mode Requirements
(Slave Mode, CKE = 0) .................................... 520
Example SPI Slave Mode
Requirements (CKE = 1) ................................. 521
External Clock Requirements .................................. 508
I2C Bus Data Requirements (Slave Mode) .............. 523
I2C Bus Start/Stop Bits Requirements
(Slave Mode) ................................................... 522
Internal RC Accuracy (INTOSC and
INTRC Sources) .............................................. 509
PIC18F47J13 FAMILY
DS39974A-page 554 Preliminary 2010 Microchip Technology Inc.
Low-Power Wake-up Time ....................................... 512
MSSPx I2C Bus Data Requirements ........................ 525
MSSPx I2C Bus Start/Stop Bits Requirements ........ 524
Parallel Master Port Read Requirements ................. 515
Parallel Master Port Write Requirements ................. 516
Parallel Slave Port Requirements ............................ 517
Reset, Watchdog Timer, Oscillator Start-up Timer,
Power-up Timer and Brown-out Reset
Requirements ................................................... 511
Timer0 and Timer1 External Clock
Requirements ................................................... 513
TSTFSZ ............................................................................ 473
Two-Speed Start-up ................................................. 415, 428
Two-Word Instructions
Example Cases .......................................................... 87
TXSTAx Register
BRGH Bit .................................................................. 349
U
ULPWU Specifications ..................................................... 504
Ultra Low-Power Wake-up ................................................. 61
V
Voltage Reference Specifications .................................... 503
Voltage Regulator (On-Chip) ........................................... 426
Operation in Sleep Mode ......................................... 427
Power-up Requirements .......................................... 427
W
Watchdog Timer (WDT) ............................................415, 424
Associated Registers ............................................... 425
Control Register ....................................................... 424
During Oscillator Failure .......................................... 429
Programming Considerations .................................. 424
WCOL ....................................................... 333, 334, 335, 338
WCOL Status Flag .................................... 333, 334, 335, 338
WWW Address ................................................................. 554
WWW, On-Line Support ...................................................... 9
X
XORLW ............................................................................ 473
XORWF ........................................................................... 474
2010 Microchip Technology Inc. Preliminary DS39974A-page 555
PIC18F47J13 FAMILY
THE MICROCHIP WEB SITE
Microchip provides online support via our WWW site at
www.microchip.com. This web site is used as a means
to make files and information easily available to
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Microchip’s customer notification service helps keep
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will receive e-mail notification whenever there are
changes, updates, revisions or errata related to a spec-
ified product family or development tool of interest.
To register, access the Microchip web site at
www.microchip.com, click on Customer Change Notifi-
cation and follow the registration instructions.
CUSTOMER SUPP ORT
Users of Microchip products can receive assistance
through several channels:
• Distributor or Representative
• Local Sales Office
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• Technical Support
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Customers should contact their distributor, representa-
tive or field application engineer (FAE) for support.
Local sales offices are also available to help custom-
ers. A listing of sales offices and locations is included in
the back of this document.
Technic al suppo rt is avail able throug h the we b site
at: http://support.microchip.com
PIC18F47J13 FAMILY
DS39974A-page 556 Preliminary 2010 Microchip Technology Inc.
READER RESP ONSE
It is our intention to provide you with the best documentation possible to ensure successful use of your Microchip prod-
uct. If you wish to provide your comments on organization, clarity, subject matter, and ways in which our documentation
can better serve you, please FAX your comments to the Technical Publications Manager at (480) 792-4150.
Please list the following information, and use this outline to provide us with your comments about this document.
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Questions:
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DS39974APIC18F47J13 Family
1. What are the best features of this document?
2. How does this document meet your hardware and software development needs?
3. Do you find the organization of this document easy to follow? If not, why?
4. What additions to the document do you think would enhance the structure and subject?
5. What deletions from the document could be made without affecting the overall usefulness?
6. Is there any incorrect or misleading information (what and where)?
7. How would you improve this document?
2010 Microchip Technology Inc. Preliminary DS39974A-page 557
PIC18F47J13 FAMILY
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
PART NO. X/XX XXX
PatternPackageTemperature
Range
Device
Device(1,2) PIC18F26J13, PIC18F27J13, PIC18F46J13 and
PIC18F47J13
VDD range 2.15V to 3.6V
PIC18LF26J13, PIC18LF27J13, PIC18LF46J13 and
PIC18LF47J13
VDD range 2.0V to 3.6V
Temperature Range I = -40C to +85C (Industrial)
E= -40C to +125C (Extended)
Package ML = QFN
PT = TQFP (Thin Quad Flatpack)
SO = SOIC
SP = Skinny Plastic DIP
SS = SSOP
Pattern QTP, SQTP, Code or Special Requirements
(blank otherwise)
Examples:
a) PIC18F47J13-I/PT 301 = Industrial temp.,
TQFP package, QTP pattern #301.
b) PIC18F47J13T-I/PT = Tape and reel, Industrial
temp., TQFP package.
Note 1: F = Standard Voltage Range with
internal 2.5V core voltage regulator
LF = Wide Voltage Range with no
internal core voltage regulator
2: T = In tape and reel TQFP
packages only
DS39974A-page 558 Preliminary 2010 Microchip Technology Inc.
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01/05/10