MCP4716A0T-E/CH - Microchip Technology

MCP47X6

PICtail™ Plus

Daughter Board

User’s Guide

Information contained in this publication regarding device

applications a nd the lik e is p ro vided on ly for yo ur con ve nien ce

and may be supers eded by up dates. I t is you r r es ponsibil it y to

ensure that your application meets with your specifications.

MICROCHIP MAKES NO REPRESENTATIONS OR

WARRANTIES OF ANY KIND WHETHER EXPRESS OR

IMPLIED, WRITTEN OR ORAL, STATUTORY OR

OTHERWISE, RELATED TO THE INFORMATION,

INCLUDING BUT NOT LIMITED TO ITS CONDITION,

QUALITY, PERFORMANCE, MERCHANTABILITY OR

FITNESS FOR PURPOSE. Microchip disclaims all liability

arising from this information and its use. Use of Microchip

devices in life support and/or safety applications is entirely at

the buyer’s risk, and the buyer agrees to defend, indemnify and

hold harmless Microchip from any and all damages, claims,

suits, or expenses resulting from such use. No licenses are

conveyed, implicitly or otherwise, under any Microchip

intellectual property rights.

Trademarks

The Microchip name and logo, the Microchip logo, dsPIC,

KEELOQ, KEELOQ logo, MPLAB, PIC , PI Cmi cro, PIC START,

PIC32 logo, rfPIC and UNI/O are registered trademark s of

Microchip Technology Incorporated in the U.S.A. and other

countries.

FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor,

MXDEV, MXLAB, SEEVAL and The Embedded Control

Solutions Company are registered trademarks of Microchip

Technology Incorporated in the U.S.A.

Analog-for-the-Digital Age, Application Maestro, chipKIT,

chipKIT logo, 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, 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 U.S.A. and other

countries.

SQTP is a service mark of Microchip T echnology Incorporated

in the U.S.A.

All other trademarks mentioned herein are property of their

respective companies.

Printed on recycled paper.

ISBN: 978-1-61341-709-6

Note the following details of the code protection feature on Microch ip 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 Digit al 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-16949:2009 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 dsPIC® 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.

MCP47X6 PICt ail™ PLUS DAUGHTER

BOARD USER’S GUIDE

Table of Contents

Preface ...........................................................................................................................5

Introduction............................................................................................................ 5

Document Layout .................................................................................................. 5

Conventions Used in this Guide............................................................................ 6

Recommended Reading.................. .. .. .............. .. .. .............. .. ................. .............. .7

The Microchip Web Site ........................................................................................ 7

Customer Support....... ......... ............................. ....................................... .............7

Document Revision History................................................................................... 8

Chapter 1. Quick Start Instructions

1.1 Introduction ..................................................................................................... 9

1.2 Description of the MCP47X6 PICtail™ Plus Daughter Board ........................9

1.3 I2C A dd r e ss B y te fo r Ea ch D e v ic e ..... .. .. ....... ....... ...... ....... ....... ........... ...... ...11

1.4 Getting Started With the Explorer 16 Development Board ........................... 12

1.5 Co nn e c ting to th e E xplore r 16 St a rter Kit ........ ....... ....... ...... ....... ...... ....... ..... 13

1.6 Getting Started with PICkit™ Serial Analyzer ..............................................20

1.7 Examples for Other Devices (MCP4706, MCP4716) ...................................30

1.8 Programming Example using the PICkit™ Serial Analyzer ........... ............. ..31

Appendix A. Schematic and Layouts

A.1 Introduction ..................................................................................................33

A.2 Bo a rd – Sc h ematic ....... .. ....... ...... ....... ....... ...... ....... ....... ...... ....... ...... ....... .. ... 3 4

A.3 Board – Top Silk and Pads ..........................................................................35

A.4 Board – Top Copper, Top Pads and Top Silk ..... .. .. .....................................36

A.5 Board – Bottom Silk and Pads ..... .. .. ...................................... .. ............... .... 37

A.6 Board – Bottom Copper, Bottom Pads and Silk .. ............... ..........................38

Appendix B. Bill Of Materials (BOM)

Worldwide Sales and Service ....................................................................................40

MCP47X6 PICtail™ Plus Daughter Board User’s Guide

MCP47X6 PICtail™ PLUS DAUGHTER

BOARD USER’S GUIDE

Preface

INTRODUCTION

This chapter contains general information that will be useful to know before using the

MCP47X6 PICtail™ Plus Daughter Board. Items discussed in this chapter include:

• Document Lay out

• Conventions Used in this Guide

• Recommended Reading

• The Microchip Web Site

• Customer Support

• Document Rev isio n History

DOCUMENT LAYOUT

This document describes how to use the MCP47X6 PICtail™ Plus Daughter Board as

a development tool to emulate and debug firmware on a target board. The manual lay-

out is as follows:

•Chapter 1. “Quick Start Instructions” – this chapter provides an overview of the

MCP47X6 PICtail™ Plus Daughter Board and instructions on how to program the

DAC register and EEPROM of the MCP4706/MCP4716/MCP4726 devices.

•Appendix A. “Schematic and Layouts” – shows the schematic and layout

diagrams for the MCP47X6 PICtail™ Plus Daughter Board.

•Appendix B. “Bill Of Materials (BOM)” – lists the parts used to build the

MCP47X6 PICtail™ Plus Daughter Board.

NOTICE TO CUSTOMERS

All documentation becomes dated, and this manual is no exception. Microchip tools and

documentation are constantly evolving to meet customer needs, so some actual dialogs

and/or tool descriptions may differ from those in this document. Please refer to our web site

(www.microchip.com) to obtain the latest documentation available.

Documents are identified with a “DS” number. This number is located on the bottom of each

page, in front of the page number. The numbering convention for the DS number is

“DSXXXXXA”, where “XXXXX” is the document number and “A” is the revision level of the

document.

For the most up-to-date information on development tools, see the MPLAB® IDE online help.

Select the Help menu, and then Topics to open a list of available online help files.

MCP47X6 PICtail™ Plus Daughter Board User’s Guide

CONVENTIONS USED IN THIS GUIDE

This manu al us es the followi ng docum entatio n conv en tion s:

DOCUMENTATION CONVENTIONS

Description Represents Examples

Arial font:

Italic characters Referenced books MPLAB® IDE User’s Guide

Emphasized text ...is the only comp ile r...

Initial caps A window the Output window

A dialog the Settings dialog

A menu selection select Enable Programmer

Quotes A field name in a window or

dialog “Save project before build”

Underlined, italic text with

right angle bracket A menu path File>Save

Bold characters A dialog button Click OK

A tab Click the Power tab

N‘Rnnnn A number in verilo g forma t,

where N is the tota l number of

digit s, R is th e radi x and n is a

digit.

4‘b0010, 2‘hF1

Text in a ngle brackets < > A key on the keybo ard Press <Ent er> , <F1>

Courier New font:

Plain Courie r New Sample source code #define START

Filenames autoexec.bat

File paths c:\mcc18\h

Keywords _asm, _endasm, static

Command-line options -Opa+, -Opa-

Bit values 0, 1

Constants 0xFF, ‘A’

Italic Courier New A variable argument file.o, where file can b e

any val id filena me

Square brackets [ ] Optional arguments mcc18 [options] file

[options]

Curly brackets and pipe

character: { | } Choice of mutually exclusive

arguments; an OR selection errorlevel {0|1}

Ellipses... R eplaces repe ated text var_name [,

var_name...]

Represents code supplied by

user void main (void)

{ ...

}

Preface

RECOMMENDED READING

This user's guide describes how to use MCP47X6 PICtail™ Plus Daughter Board. The

following Microchip documents are available and recommended as supplemental

reference resources.

PICkit™ Serial Analyzer User’s Guide (DS51647)

Consult thi s document fo r instr ucti ons on how to use the PICkit ™ Serial Analyzer

hardware and software.

MCP4706/M C P4 716 /MCP4726 Data Sheet, “8-/10-/12 -Bi t Vo ltage Output

Digital-to-Analog Converter with EEPROM Memory” (DS22272)

This data sheet provides detailed information regarding the MCP47x6 product family.

PIC24FJ128GA010 Family Data Sheet (DS39747)

Explorer 16 Development Board User’s Guide (DS51589)

AN1079, “Using the C30 Compiler and the I2C Peripheral to Interface Serial

EEPROMs with dsPIC33F” (DS01079)

THE MICROCHIP WEB SITE

Microchip provides online support via our web site at www.microchip.com. This web

site is used as a means to make files and information easily available to customers.

Accessible by using your favorite Internet browser, the web site contains the following

information:

•Product Support – Data sheets and errata, application notes and sample

programs, design resources, user’s guides and hardware support documents,

latest software releases and archived software

•General Technical Support – Frequently Asked Questions (FAQs), technical

support requests, online discussion groups, Microchip consultant program

member listing

•Business of Microchip – Product selector and ordering guides, latest Microchip

press releases, listing of seminars and events, listings of Microchi p sale s offices,

distributors and factory representatives

CUSTOMER SUPPORT

Users of Microchip products can receive assistance through several channels:

• Distributor or Representative

• Local Sales Office

• Field Application Engineer (FAE)

• Technical Support

Customers should contact their distributor , representative or field application engineer

(FAE) for support. Local sales offices are also available to help customers. A listing of

sales offices and locations is included in the back of this document.

Technical support is available through the web site at: http://support.microchip.com.

MCP47X6 PICtail™ Plus Daughter Board User’s Guide

DOCUMENT REVISION HISTORY

Revision B (October 2011)

• Replaced the front and back views of the board with updated photos for Figure

1-1: “Front and Back Views of the MCP47X6 PICtail™ Plus Daughter Board.”

• Added buzzer information to Appendix B. “Bill Of Materials (BOM)”.

Revision A (May 2011)

• Initial Release of this Document.

MCP47X6 PICtail™ PLUS DAUGHTER

BOARD USER’S GUIDE

Chapter 1. Quick Start Instru ctions

1.1 INTRODUCTION

The following sections provide an overview of the MCP47X6 PICtail™ Plus Daughter

Board and demonstrate how to: (a) use these devices in a 16-bit MCU environment and

(b) evaluate these device’s features using the PICkit™ Serial Analyzer (P/N:

DV164122). The MCP47X6 PICtail™ Plus Daughter Board is designed to work with

both the Explorer 16 Development Board (P/N: DV164033) and the PICkit™ Serial

Analyzer (P/N: DV164122).

The following topics are covered:

• Description of the MCP47X6 PICtail™ Plus Daughter Board.

• How to use the MCP47X6 PICtail™ Plus Daughter Board with the Explorer 16

Starter Kit.

• How to use MCP47X6 PICtail™ Plus Daughter Board with the PICkit™ Serial

Analyzer.

1.2 DESCRIPTION OF THE MCP47X6 PI Ctail™ PLUS DAUGHTER BOARD

The MCP47X6 PICtail™ Plus Daughter Board (P/N ADM00317) contains the

MCP4706 (8-bit DAC), MCP4716 (10-bit DAC), and MCP4726 (12-bit DAC) devices.

These DAC devices are communicating with the external Master device (MCU) using

I2C serial interface communication. The MCP47X6 PICtail™ Plus Daughter Board

does not include the Master device (MCU), but it has two interface connectors that can

be used for the external device, which has the Master device (MCU) to communicate

with this board. The two interfaces are:

(a) Connector (J3) for Explorer 16 S tarter Kit (P/N: DV164033) for 16-bit MCU

environment. The firmware for the 16-bit MCU is provided with this board.

(b) 6-pin connector (J1) for PICkit™ Serial Analyzer (P/N: DV164122) for reading and

writing the DAC registers using the PICkit™ Serial Analyzer PC software.

The user can connect the MCP47X6 PICtail™ Plus Daughter Board to one of the above

tools and perform their own experiments.

These two external devices are used to control the DAC devices on the daughter

board. The user can choose one of these tools to use along with the daughter board.

The MCP47X6 PICtail™ Plus Daughter Board has test points for SCL and SDA, and

VOUT pads for each device. By connecting an oscilloscope to these test points (to SCL,

SDA, VOUT) or a digital multimeter to the VOUT pads, the user can examine the data

communications through the I2C™ bus line and observe the resulting DAC output

(VOUT). Refer to Appendix A. “Schematic and Layouts”.

Note 1: If you use the PIC Explorer 16, you need Sections 1.4 — 1.5 onl y.

2: If y ou us e th e PIC kit™ Serial Analyzer , you need Sections 1.6 — 1.8 only .

Note: The user can also control the DAC devices on the MCP47X6 PICtail™ Plus

Daughter Board by providing I2C commands through the interface

communication terminals on the daughter board, without using the Explorer

16 Development Board or the PICkitTM Serial Analyzer.

MCP47X6 PICtail™ Plus Daughter Board User’s Guide

FIGURE 1-1: Front and Back Views of the MCP47X6 PICtail™ Plus Daughter

Board.

Connector for Explorer 16 Development Board

Connector for PICkitTM Se ri al Analy z er

104-00317-R1

(a) Front View (b) Back View

Quick Start Ins truc t ions

1.3 I2C ADDR ESS BYTE FOR EACH DEV ICE

Each DAC device on the board has its own I2C address bits which are preprogrammed

at the factory. Table 1-2 shows the I2C address byte of each device.

TABLE 1-1: TERMINAL FUNCTION TABLE

Connector/Pin/Terminal Name Functions

J1 Connector Connector for PICkitTM Serial Analyzer.

Note: Do not use this p in when this b oard is used wi th the

Explorer 16 Deve lopment Board.

J3 Connector Connector for Explorer 16 Development Board.

Note: Do not u se thi s pin when this board is us ed with t he

PICkitTM Serial Analyzer.

External Reference Selecti on

Jumper Pins (a) Connect pin 2 to “VREF_EXT” if external reference is

applied at the VREF_EXT pin.

(b) Connect pin 2 to “VDD” if VDD is used as reference

externally.

Note: This pin does not affect if VDD is se lected as

reference internally by the configuration bit setting.

JP1 VDD connection through (a) J1 Connector for PICkitTM

Serial Analyzer, or (b) J3 Connector f or Exp lorer 16

Development Board.

JP2 Connecting VOUT 1 (MCP4726 output) to Buzzer.

Note: Do n ot connect thi s jumper if yo u don’t need au dible

sounds.

VDD (a) VDD m onitori ng term inal whe n JP 1 is co nnecte d (VDD

is provided by the external tools).

(b) VDD connection terminal when JP2 is disconnected.

You can co nnect your own VDD to this pin.

VSS Ground Reference

VOUT 1 DAC output te rminal from M CP4726 (12-bit DAC).

VOUT 2 DAC output te rminal from M CP4716 (10-bit DAC).

VOUT 3 DAC output te rminal from MCP4706 (8-bit DAC).

VREF_EXT External Reference connection terminal

SDA Connected to I2CTM SDA line

SCL Connected to I2CTM SCL line

VR1 Volume control for Buzzer 1.

Note: Disconnect JP2 if you don’t need audible sounds.

TABLE 1-2: I2C ADDRESS BYTE OF EACH DAC DEVICE

Device Address Byte (1st Byte):

Device Code + Address Bits (A2, A1, A0) + R/W

I2C Addr ess

Byte for Write

Command

(1st Byte)

I2C Address

Byte for Read

Command

(1st Byte)

MCP4726

(12-bit DAC)

1100-000R/W

1100-0000

1100-0001

MCP4716

(10-bit DAC)

1100-001R/W 1100-0010 1100-0011

MCP4726

(8-bit DAC)

1100-010R/W 1100-0100 1100-0101

where R/W = 0 for write command and 1 for re ad command.

MCP47X6 PICtail™ Plus Daughter Board User’s Guide

1.4 GETTING STARTED WITH THE EXPLORER 16 DEVE L OPMENT BOARD

This section describes how to use the MCP47X6 PICtail™ Plus Daughter Board with

the Explorer 16 Development Board.

After receiving the MCP47X6 PICtail™ Plus Daughter Board, program the 16-bit

PIC24FJ128 MCU on the Explorer 16 S tarter Kit using the firmware provided. The user

can download the latest firmware from the Microchip website: www.microchip.com.

•Step 1: Insert the MCP47X6 PICtail™ Plus Daughter Board to the Explorer 16

Development Board. Figure 1-2 shows the configuration when the board is

connected to the Explorer 16 Development Board.

•Step 2: Program the Explorer 16 Development Board using the firmware provided

with this board. Figure 1-3 shows the connection of the MPLAB ICD2 with the

Explorer 16 Development Board for programming.

•Step 3: Once the programming is done, disconnect the MPLAB ICD2 from the

Explorer 16 Development Board.

•Step 4: Now you can evaluate the performance of the DAC devices. The LCD on

the Explorer 16 Development Board will display instructions on how to select the

DAC device using the push button switches on the Development Board: (a) S3 for

MCP4726, (b) S6 for MCP4716, and (c) S5 for MCP4706. S4 is used to increment

the DAC code. If you hold down the S4 switch, the DAC code will increase

continuously until it reaches the maximum value, and then it starts from code 0

again. You can observe this event by simply connecting a voltmeter at the VOUT

pin while holding down the S4 switch.

All procedures are very intuitive and interactive using the Push button switches and by

following the instructions on the LCD. The user can observe the DAC output (VOUT)

changes using an oscilloscope or voltmeter by pressing the S4 switch. The firmware

provided is an example that can be used as reference for the user’s applications.

Quick Start Ins truc t ions

1.5 CONNECTING TO THE EXPLORER 16 STARTER KIT

1. Connect the MCP47X6 PICtail™ Plus Daughter Board to the J5 socket on the

Explorer 16 Development Board as shown in Figure 1-2.

FIGURE 1-2: Connecting the MCP47X6 PICtail™ Plus Daughter Board to the

Explorer 16 Development Board.

1.5.1 Programming the PIC24FJ128 MCU

The Explorer 16 Development Board contains the PIC24FJ128 MCU. The user can

download the firmware to the MCU using the MPLAB ICD2 (or ICD3) programmer.

1.5.1.1 THE PIC24FJ128 MCU FIRMWARE FOR THE MCP47X6 PICtail™ PLUS

DAUGHTER BOARD

The original firmware for the Explorer 16 Development Board is modified for the

MCP47X6 PICtail™ Plus Daughter Board demonstration. The firmware uses most of

the original code for the Explorer 16 Development Board except the I2C per ip her al

control routines for the PIC24FJ128 MCU.

The following four routines are added or modified from the original Explorer 16

Developm ent Boa rd firmwar e:

• PIC24ExplDemo_MCP4726_Main.c

• MCP47x6_I2C_Func.c

• Banner_MCP4726_MCP4716_MCP4706.c

• I2C_MCP4726.h

The source codes are compiled by using Microchip’s C30 Compiler and the hex code

is programmed to the MCU using the MPLAB ICD 2. Figure 1-3 shows the connection

between the MPLAB ICD 2 and the Explorer 16 Development Board. Figure 1-4 shows

the MPLAB IDE programming environment.

MCP47x6

PICtail Plus

Daughter

Board

Explorer 16 Development Board (P/N DV164033)

S3: Select MCP4726

S6: Select MCP4716

S5: Select MCP4706

S4: Increment DAC Code

MCP47X6 PICtail™ Plus Daughter Board User’s Guide

1.5.1.2 FIRMWARE FLOW CHART FOR THE MCP47X6 PICtail™ PLUS

DAUGHTER BOARD

Figure 1-5 shows the flow chart of the firmware. Once the MCU firmware is

programmed, the LCD will display instructions (with repeats) for the next steps. The

fir mwa r e uses fo ur pu sh but t o n swi t ch es on th e Exp lor e r 16 De velopmen t Bo ar d. Th e

features of the switches are:

• S3: Selecting MCP4726 (12-bit DAC). MCP4726 Output is available at VOUT 1

• S6: Selecting MCP4716 (10-bit DAC). MCP4716 Output is available at VOUT 2

• S5: Selecting MCP4706 (8-bit DAC). MCP4706 Output is available at VOUT 3

• S4: Incrementing the DAC code using a write command (writing both DAC register

and EEPROM). The DAC output can be monitored at the VOUT terminal. See

Figure 1-6 for the VOUT waveform.

The Buzzer is connected to the MCP4726 output through JP2. Please disconnect JP2

if you don’t need audible sounds.

The firmware is interactive with push button switches. Table 1-3 shows the details of

the switches that are used.

The user can switch to other devices by using the device selection push button

switches (S3, S6 and S5) any time. The DAC output can be updated with the S4. The

DAC’s configuration bit settings that are used in the firmware are:

• Gain = 1x, Reference = Internal VDD

1.5.1.3 DAC OUTPUT (VOUT)

The MCP47X6 PICtail™ Plus Daughter Board has three DAC output terminals for each

DAC device.

•V

OUT 1: Output from the MCP4726 (12-bit DAC)

•V

OUT 2: Output from the MCP4716 (10-bit DAC)

•V

OUT 3: Output from the MCP4706 (8-bit DAC)

The user can observe the DAC outputs at the VOUT test terminals using a digital

voltmeter or an oscilloscope. Figure 1-7 shows the I2C clock (SCL) and data (SDA)

signals, and DAC output waveform.

TABLE 1-3: SWITCHES FOR THE FIRMWARE CONTROL

Device Device Selection

Switch

Switch to

increment the

DAC Input

Code

Output

Terminal Configu ration Bit

Settings

MCP4726

(12 bit DAC) S3

VOUT 1

Gain = 1x,

VREF = VDD

MCP4716

(10 bit DAC) S6 VOUT 2

MCP4726

(8 bit DAC) S5 VOUT 3

Note: The DAC code is also programmed in EEPROM. The DAC devices on the

MCP47x6 Daughter Board will hold the latest settings when the power

supply is removed. When power supply is back on again (Example:

Remove the board from the Explorer 16 Development Board and connect

again), the same DAC output voltage with the previous settings will be

immediately available at the DAC output terminal.

Quick Start Ins truc t ions

1.5.1.4 AUDIBLE BUZZER

The MCP47X6 PICtail™ Plus Daughter Board includes a buzzer. This buzzer is directly

connected to the VOUT of the MCP4726 (12-bit DAC). The user can disable the buzzer

by disconnecting JP2. The buzzer volume also can be adjusted by VR1.

FIGURE 1-3: MPLAB ICD2 Connection to Explorer 16 Development Board with the MCP47X6

PICtail™ Plus Daughter Board for Programming.

MCP47x6 PICtail Plus

Daughter Board

Explorer 16 Development Board

(P/N DV164033) (P/N ADM00317)

MCP47X6 PICtail™ Plus Daughter Board User’s Guide

FIGURE 1-4: MPLAB IDE Programming Environment.

Quick Start Ins truc t ions

FIGURE 1-5: Flow Chart for the MCP47X6 PICtail™ Plus Daughter Board Firmware.

START

POWER-UP

YES

LCD Display Instructions

Is Any Device Selected?

Turn on LED D3

(D9: MCP4726, D7: MCP4716, D3: MCP4706)

Is S4 Pressed?

Turn on LED

(S3: MCP4726, S6: MCP4716, S5: MCP4706)

Send I2C Write Command for DAC Register and EEPROM

DAC Code = DAC Code + 1 LSB

Configuration Register Settings: VREF = Internal VDD, Gain = 1x

DAC Code = FSR?

Reset DAC Code to 0x00h

YES

Is Any Device Selected?

(D9: MCP4726, D7: MCP4716, D3: MCP4706)

Turn on LED

(S3: MCP4726, S6: MCP4716, S5: MCP4706)

MCP47X6 PICtail™ Plus Daughter Board User’s Guide

FIGURE 1-6: I2C Write Command Waveforms for the MCP4726, with VREF = VDD and Gain = 1x.

I2C

Clock Signal

I2C

Data Signal

(SCL)

(SDA)

(b) Fast W rite Command

(a) Write command to write DAC Input Register and EEPROM

DAC Code = 0111-1110-0011 = 7E3(h) = 2019 (decimal)

DAC Code = 0110-1101-1001 = 6F9 (hex) = 1753 (decimal)

I2C

Data Signal

(SDA)

I2C

Clock Signal

(SCL)

Expected DAC Output VREF Dn

•

4096

--------------------------52019

•

4096

-------------------- 2.465V===

Expected DAC Output VDD Dn

•

4096

------------------------51753

•

4096

-------------------- 2.1398V===

Quick Start Ins truc t ions

FIGURE 1-7: I2C SCL, SDA, and VOUT Waveforms for the MCP4726 While Incrementing the DAC

Code by 1 LSB. The Fast Write Command is Used for this Example.

I2C

Clock Signal

I2C

Data Signal

VOUT

at VOUT Pin

Write Data (Dn) = 1111 - 01101111 (binary)

A: Zoomed-in section for SCL and SDA signals.

(SCL)

(SDA)

for VDD = 5V

VOUT VDD Dn

•

4096

------------------------ 4.823V==

MCP47X6 PICtail™ Plus Daughter Board User’s Guide

1.6 GETTING STARTED WITH PICKIT™ SERIAL ANALYZER

The user can connect the MCP47X6 PICtail™ Plus Daughter Board to the PICkit™

Serial Analyzer by setting them up as shown in Figure 1-8.

The following describes how to use them together:

1. Connect the MCP47X6 PICtail™ Plus Daughter Board’s J2 pin socket to the

PICkit™ Serial Analyzer.

2. Connect a digital voltmeter to VOUT test terminals and VSS:

-V

OUT 1 for MCP4726

-V

OUT 2 for MCP4716

-V

OUT 3 for MCP4706

FIGURE 1-8: MCP47X6 PICtail™ Plus Daughter Board with the PICkit™ Serial Analyzer.

PICkit Serial Analyzer

MCP47x6 PICtail Plus Daughter Board

USB Cable: Connected between the PICkit Serial Analyzer and Personal Computer.

DAC analog

Output (VOUT)

Quick Start Ins truc t ions

1.6.1 PICkit™ Seri al Analyzer PC Soft ware Set-Up for the MCP47x6

Daughter Board

The following steps describe how to set up and use the PICkit™ Serial Analyzer PC

Graphic User Interface (GUI) to evaluate the MCP47X6 PICtail™ Plus Daughter Board.

1. Install the PICkit™ Serial Analyzer software onto your personal computer (PC).

2. Connect the USB cable between the PICkit™ Serial Analyzer and your PC.

3. Run the PICkit™ Serial PC Software. It will open up the graphic user interface

(GUI) as shown. Click the Next button and follow the instruc ti ons.

4. Select the Communication Mode type: I2C Master, and click the Next button.

MCP47X6 PICtail™ Plus Daughter Board User’s Guide

5. Select either 100 kHz or 400 kHz, and click the Next button.

6. Select No on Enable Pull-ups, and click the Next button.

Note: The MCP47x6 devices support the I2C bus data rate up to 3.4 MHz, but the

current version of the PICkit™ Serial Analyzer supports the I2C bus data

rate up to 400 kHz only.

Note: The MCP47X6 PICtail™ Plus Daughter Board has its own pull-up resistors,

therefore, you don’t need additional pull-up resistors from the PICkit™

Serial Analyzer.

Quick Start Ins truc t ions

7. Select the VDD voltage of the MCP47X6 PICtail™ Plus Daughter Board and click

the Next button.

Case 1: When you use VDD fr om the PICkit™ Serial Analyzer

If you choose PICkit™ Serial will power my device and 5 Volts as shown

below, the MCP47X6 PICtail™ Plus Daughter Board is powered by the 5V DC

(range between 4.85V ~ 5V) from the PICkit™ Serial Analyzer through the JP1

jumper. In this case, make sure that the JP1 jumper on the MCP47X6 PICtail™

Plus Daughter Board is connected.

Case 2: When you use your own VDD

Y ou can also provide your own VDD voltage by applying a VDD voltage at the VDD

terminal. In this case, make sure that the JP1 jumper is disconnected.

MCP47X6 PICtail™ Plus Daughter Board User’s Guide

8. Click the OK button. You have made all of the PICkit™ Serial Analyzer

Configuration set-ups. You are now ready to program the MCP47X6 PICtail™

Plus Daughter Board using the PICkit™ Serial Analyzer.

Quick Start Ins truc t ions

1.6.2 Creating Script Files

In order to create a communication between the PICkit™ Serial Analyzer and the

MCP47X6 PICtail™ Plus Daughter Board, a script file is needed. The following

procedure shows how to create script files and how to use them.

Select Communication -----> Script ---> Script Builder.

Note: The MCP47X6 scripts are in a text file on the MCP47X6 PICtailTM Plus

Daughter Board’s product web page. The scripts can be copied into the

PICkitTM serial’s CommScripts.txt file.

MCP47X6 PICtail™ Plus Daughter Board User’s Guide

1.6.2.1 CREATING SCRIPT FILES TO PROGRAM DAC REGISTER AND

EEPROM

1. Click on WriteBlockAddrA8 in “Example I2C Scripts” column.

This will fill in the spaces under Script Detail column.

Modifying the Script Details Parameters:

2. Under the Script Detail column, select the item in the parameter box.

3. Right click the mouse button and an option box appears to the right of your

selection. This gives you the options that are available for the parameter

selected. Select the desired option.

4. Keep the parameters in the same order as shown below.

The following example shows how to create a script file for a Write command (DAC

4. Change the parameter val ue.

1. Choose these boxes and

right click the mouse but-

ton for options available.

2. You can also change the

values or delete the boxes.

3. Make sure the listed

param e te rs in th e “Scri p t

Detail” should be in the

exact order as shown here.

I2CSTART

I2CWRTBYT

I2CSTOP

Script Detail

-----> This means there are four bytes to send

-----> 1st Write Byte: Address byte = 1100-0000

-----> 3rd W rite Byte: 1111-1111 (Data Byte)

-----> 3rd Write Byte: 1111-0000 (Data Nibble +Don’t care Nibble)

60 ----- > 2nd Write Byte:1100-0000 (Command + Config.)

Note: All the 8 parameters above must be listed in order. The parameters with * are not

modifiable. Address bits for the MCP4726 is (A2,A1,A0) = (0,0,0). You can

choose any data bit you want in the 3rd and 4th bytes. If you use the above write

data, the MCP4726 device will output:

VOUT

VDD FFF(hex)(V)

⋅

4096

-------------------------------------------------V

DD V()==

Quick Start Ins truc t ions

1.6.2.2 SAVING THE SCRIPT FILE AND PROGRAMMING DAC REGISTER

(WRITING BOTH DAC REGISTER AND EE PROM )

1. Change the 3rd and 4th data bytes, if desired, in the Script Detail column.

2. T ype in any script name (i.e., MCP4726_WriteEE) in the space below the Script

Name menu.

3. Click Save Script button.

4. Click Execute Script button.

5. The analog output voltage of the MCP4726 will be monitored at VOUT1 terminal

on the Daughter Board.

2nd Write Byte

3rd Write Byte

1st Write Byte

4th Write Byte

Note: At this point, the PICkit™ Serial transmits a write command of “Write DAC

saved file name will appear in Users I2C Scripts column and can be

reused at any time by selecting the file name.

Note: When you click on the “Execute Script” menu, the “Busy” LED on the PICkit

Serial Analyzer will momentarily turn on and then turn off. If the LED

remains ON, a communications problem has occurred. Remove the PICkit

Serial Analyzer from the personal computer and recheck the parameter

value in the order of the parameters under the Script Detail column. Try

again until the “Busy” LED goes OFF after executing the write command.

MCP47X6 PICtail™ Plus Daughter Board User’s Guide

1.6.2.3 CREATING A SCR IPT FILE TO PROGRAM THE DAC REGISTER WITH

FAST MODE COMMAND

1. Get a new script file by selecting the WriteAddrA8 from the “Example I2C

Scripts” column.

2. Modify the Script Det ail column as shown bel ow:

3. Type in the script name (i.e., MCP4726_WriteF) in the space below the Script

Name menu.

4. Click the Execute Script button.

I2CSTOP

Script Detail

-------> This means Master will send three bytes

-------> 1st Write Byte: Address byte = 1100-0000

-------> 2nd Write Byte: 0000-FFFF (Data Byte)

-------> 3rd Write Byte: FFFF-FFFF (Data Nibble + Don’t care Nibble)

Now the device will output VOUT VDD Dn

⋅

4096

-----------------------5V 800 hex()

⋅

4096

---------------------------------- 2 .5 V== =

I2CSTART

I2CWRTBYT

3 Bytes to Send

1st Write Byte

2nd Write B y te

3rd Write Byte

Quick Start Ins truc t ions

1.6.3 Verifying the EEPROM Data

One of the important features of the MCP4706 devices is the nonvolatile memory.

When the device is first powered up, it outputs an analog voltage corresponding to the

data in the EEPROM. The user can confirm this feature using the following procedures:

1. Program the EEPROM memory. Refer to Section 1.6.2.1 “Creating Script

Files to Program DAC Register and EEPROM”.

2. Remove power (VDD) from the MCP47X6 PICtail™ Plus Daughter Board, or

remove the daughter board from the PICkit™ Serial Analyzer.

3. Reconnect power (VDD) to the Daughter Board or reconnect the Daughter Board

to the PICkit™ Serial Analyzer.

4. You can confirm that the programmed DAC output at the DAC output terminal

(VOUT 1, VOUT 2, VOUT 3) by using a digital voltmeter.

1.6.4 Reading both the DAC Register and EEPROM dat a:

You can read back the DAC code stored in the DAC register and EEPROM with the

following steps:

1. Create a read command script file name as shown below and execute it.

2. The results (DAC code and EEPROM data) will appear on the PICkit™ Serial

Trans ac tio ns page .

MCP47X6 PICtail™ Plus Daughter Board User’s Guide

1.7 EXAMPLES FOR OTHER DEVICES (MCP4706, MCP 4716 )

The examples shown in the previous sections use the I2C address bits of the MCP4726

(A2, A1, A0 = 0,0,0). The same procedure is also applicable for the remaining

two devices (MCP4706, MCP4716) by simply using the right address byte for each

device. Table 1-2 shows the address byte of each device. Refer to the

MCP4706/MCP4716/MCP4726 Data Sheet for the data format of each command.

Written Data

Reading Data

using a Write Command

using a Read Command

Requesting

6 Bytes

DAC Register Data (Configuration bits + DAC Code)

EEPROM Data (Configuration bits + DAC Code)

Quick Start Ins truc t ions

1.8 PROGRAMMING EXAMPLE USING THE PICKIT™ SERIAL ANA LYZER

The following example shows how to set DAC code for the desired DAC output voltage

using the Fast Write command.

See the MCP4706/MCP4716/MCP4726 Data sheet for more details on the data

formats for each device.

FIGURE 1-9: MCP47x6 Device Address Byte.

FIGURE 1-10: Fast Mode Write Command for Targeted VOUT = 2.5V when VREF = 5V.

1 1 0 0 A2 A1 A0 R/W

Device Code Address Bits

* Factory Programmed Address Bits:

(A2, A1, A0) = (0,0,0) for MCP4726

= (0,0,1) for MCP4716

= (0,1,0) for MCP4706

Start 00xC0 0 PD1 PD0 D11 D10 D9 D8 D7 D5D6 D4 D3 D1D2 D0 STOP ACK ACK

0x08h 0x00h

211

Address Byte:

when (A2 A1A0) = 000

ACK

(a) MCP4726

Targeted DAC Output = INL x D

= 2.5V

Dn2.5V

INL

----------- 2.5V

1.2207mV

------------------------- 2048 211

== ==

(b) MCP4716

Start 00xC2 0 PD1 PD0 D9 D8 D7 D6 D5 D4 D2D3 D1 D0 XXSTOPACK ACK

0x08h 0x00h

Address Byte:

when (A2 A1A0) = 001

ACK

Dn2.5V

INL

----------- 2.5V

4.8828mV

-------------------------5122

== ==

Start 00xC4 0 PD1 PD0 X X X XD7 D6 D4D5 D3 D2 D1 D0 STOPACK ACK

0x00h 0x80h = 27

Address Byte:

when (A2 A1A0) = 010

ACK

Dn2.5V

INL

----------- 2.5V

19.53125mV

-------------------------------1282

== ==

(1 0 0 0 0 0 0 0 0 0 0 0)

( 0 0 0 0) (1 0 0 0 0 0 0 0 )

INL = VREF/2N = 5V/2N

= 5V/4096 = 1.2207 mV for 12-bit DAC (MCP4726)

= 5V/1024 = 4.8828 mV for 10-bit DAC (MCP4716)

= 5V/256 = 19.53125 mV for 8-bit DAC (MCP4706)

MCP47X6 PICtail™ Plus Daughter Board User’s Guide

NOTES:

MCP47X6 PICtail™ PLUS DAUGHTER

BOARD USER’S GUIDE

Appendix A. Schematic and Layouts

A.1 INTRODUCTION

This appendix contains the following schematics and layouts for the MCP47x6

PICtail™ Plus Daughter Board:

• Board – Schematic

• Board – Top Silk and Pads

• Board – Top Copper, Top Pads and Top Silk

• Board – Bottom Silk and Pads

• Board – Bottom Copper, Bottom Pad s and Si lk

MCP47X6 PICtail™ Plus Daughter Board User’s Guide

A.2 BOARD – SCHEMATIC

Schematic and Layou ts

A.3 BOARD – TOP SILK AND PADS

MCP47X6 PICtail™ Plus Daughter Board User’s Guide

A.4 BOARD – TOP COPPER, TOP PADS AND TOP SILK

Schematic and Layou ts

A.5 BOARD – BOTTOM SILK AND PADS

MCP47X6 PICtail™ Plus Daughter Board User’s Guide

A.6 BOARD – BOTTOM COPPER, BOTTOM PADS AND SILK

MCP47X6 PICtail™ PLUS DAUGHTER

BOARD USER’S GUIDE

Appendix B. Bill Of Materials (BOM)

TABLE B-1: BILL OF MATERIALS (BOM)

Qty Reference Description Manufacturer Part Number

7 C1, C3, C4,

C5, C6, C7, C8 CAP.1UF 16V CERAMIC X7R 0603 Panasonic - ECG ECJ-1VB1C104K

1 C2 CAP 1.0UF 16V CERAMIC X5R 0603 Panasonic - ECG ECJ-1VB1C105K

1 J1 CONN HEADER 6 POS. 100 R/A TIN Molex/Waldom Electronics

Corp 22-05-2061

1 JMP1 CONN HEADER 3 POS. 100" STR

TIN Molex/Waldom Electronics

Corp 90120-0123

3JMP1, JP1,

JP2 SHUNT LP W/HANDLE 2 POS. 30AU

*Bag shunts with kit* Tyco Electronics/Amp 881545-2

2 J P1, JP2 CONN HEADER 2 POS. 100 VERT

TIN Molex/Waldom Electronics 22-03-2021

1 PCB RoHS Compliant Bare PCB,

MCP4726, MCP4716 MCP4706

PICtailTM Plus Daughter Board

- 104-00317

1 R1 RES 100 OHM 1/10W 1% 0603 SMD Panasonic - ECG ERJ-3EKF1000V

2 R2, R3 RES 10.0K OHM 1/10W 1% 0603

SMD Panasonic - ECG ERJ-3EKF1002V

2 R4, R5 RES 10 OHM 1/10W 5% 0603 SMD Panasonic - ECG ERJ-3GEYJ100V

1 U2 8-/10-/12-Bit Voltage Output

Digita l-to-Analog Converte r with

EEPROM

Microchip Technology Inc. MCP4706A2T-E/MA

1 U3 8-/10-/12-Bit Voltage Output

Digita l-to-Analog Converte r with

EEPROM

Microchip Technology Inc. MCP4716A1T-E/MA

1 U4 8-/10-/12-Bit Voltage Output

Digita l-to-Analog Converte r with

EEPROM

Microchip Technology Inc. MCP4726A0T-E/MA

10 Vout1,Vout2,

Vout3, VSS,

EXT, VSS,

SDA, SCL,

VSS, AVDD

PC TEST POINT COMPACT SMT Keystone Electronics 5016

1 VR1 POT 5.0K OHM THUMBWHEEL

CERM ST Bourns Inc. 3352T-1-502

1 SP1 BUZZER PIEZO 3kHz 24mm PIC MT Mallory Sonalert Products, Inc. PK-21N30PQ

Note 1: The componen t s listed in this Bill of Materi als are represe nt ativ e of the PCB asse mbly. The released BO M

used in manufacturing uses all RoHS-compliant components.

AMERICAS

Corporate Office

2355 West Chandler Blvd.

Chandler, AZ 85224-6199

Tel: 480-792-7200

Fax: 480-792-7277

Technical Support:

http://www.microchip.com/

support

Web Address:

www.microchip.com

Atlanta

Duluth, GA

Tel: 678-957-9614

Fax: 678-957-1455

Boston

Westborough, MA

Tel: 774-760-0087

Fax: 774-760-0088

Chicago

Itasc a , IL

Tel: 630-285-0071

Fax: 630-285-0075

Cleveland

Independence, OH

Tel: 216-447-0464

Fax: 216-447-0643

Dallas

Addison, TX

Tel: 972-818-7423

Fax: 972-818-2924

Detroit

Farmington Hills, MI

Tel: 248-538-2250

Fax: 248-538-2260

Indianapolis

Noblesville, IN

Tel: 317-773-8323

Fax: 317-773-5453

Los A n ge les

Mission Viejo, CA

Tel: 949-462-9523

Fax: 949-462-9608

Santa Clara

Santa Clara, CA

Tel: 408-961-6444

Fax: 408-961-6445

Toronto

Mississauga, Ontario,

Canada

Tel: 905-673-0699

Fax: 905-673-6509

ASIA/PACIFIC

Asia Pacific Office

Suites 3707-14, 37th Floor

Tower 6, The Gateway

Harbour City, Kowloon

Hong Kong

Tel: 852-2401-1200

Fax: 852-2401-3431

Australia - Sydney

Tel: 61-2-9868-6733

Fax: 61-2-9868-6755

China - Beijing

Tel: 86-10-8569-7000

Fax: 86-10-8528-2104

China - Chengdu

Tel: 86-28-8665-5511

Fax: 86-28-8665-7889

China - Chongqing

Tel: 86-23-8980-9588

Fax: 86-23-8980-9500

China - Hangzhou

Tel: 86-571-2819-3187

Fax: 86-571-2819-3189

China - Hong Kong SAR

Tel: 852-2401-1200

Fax: 852-2401-3431

China - Nanjing

Tel: 86-25-8473-2460

Fax: 86-25-8473-2470

China - Qingdao

Tel: 86-532-8502-7355

Fax: 86-532-8502-7205

China - Shanghai

Tel: 86-21-5407-5533

Fax: 86-21-5407-5066

China - Shenyang

Tel: 86-24-2334-2829

Fax: 86-24-2334-2393

China - Shenzhen

Tel: 86-755-8203-2660

Fax: 86-755-8203-1760

China - Wuhan

Tel: 86-27-5980-5300

Fax: 86-27-5980-5118

China - Xian

Tel: 86-29-8833-7252

Fax: 86-29-8833-7256

China - Xiamen

Tel: 86-592-2388138

Fax: 86-592-2388130

China - Zhuhai

Tel: 86-756-3210040

Fax: 86-756-3210049

ASIA/PACIFIC

India - Bangalore

Tel: 91-80-3090-4444

Fax: 91-80-3090-4123

India - New Delhi

Tel: 91-11-4160-8631

Fax: 91-11 - 4160-8632

India - Pune

Tel: 91-20-2566-1512

Fax: 91-20-2566-1513

Japan - Yokohama

Tel: 81-45-471- 6166

Fax: 81-45-471-6122

Korea - Daegu

Tel: 82-53-744-4301

Fax: 82-53-744-4302

Korea - Seoul

Tel: 82-2-554-7200

Fax: 82-2-558-5932 or

82-2-558-5934

Malaysia - Kuala Lumpur

Tel: 60-3-6201-9857

Fax: 60-3-6201-9859

Malaysia - Penang

Tel: 60-4-227-8870

Fax: 60-4-227-4068

Philippines - Manila

Tel: 63-2-634-9065

Fax: 63-2-634-9069

Singapore

Tel: 65-6334-8870

Fax: 65-6334-8850

Taiwan - Hsin Chu

Tel: 886-3-5778-366

Fax: 886-3-5770-955

Taiwan - Kaohsiung

Tel: 886-7-536-4818

Fax: 886-7-330-9305

Taiwan - Taipei

Tel: 886-2-2500-6610

Fax: 886-2-2508-0102

Thailand - Bangkok

Tel: 66-2-694-1351

Fax: 66-2-694-1350

EUROPE

Austria - Wels

Tel: 43-7242-2244-39

Fax: 43-7242-2244-393

Denmark - Cop e nha gen

Tel: 45-4450-2828

Fax: 45-4485-2829

France - Paris

Tel: 33-1-69-53-63-20

Fax: 33-1-69-30-90-79

Germany - Munich

Tel: 49-89-627-144-0

Fax: 49-89-627-14 4-44

Italy - Milan

Tel: 39-0331-742611

Fax: 39-0331-466781

Netherlands - Drunen

Tel: 31-416-690399

Fax: 31-416-690340

Spai n - Madrid

Tel: 34-91-708-08-90

Fax: 34-91-708-08 -91

UK - Wokingham

Tel: 44-118-921- 5869

Fax: 44-118-921-5820

Worldwide Sales and Service

08/02/11