C8051F231
8K Flash, 256 RAM, 32-Pin MCU
PRELIMINAR
Y
Port 0
Latch
Port 1
Latch
JTAG
Logic
TCK
TMS
TDI
TDO
UART
8kbyte
FLASH
256 byte
RAM
VDD
Monitor
SFR Bus
Port 2
Latch
Port 3
Latch
8
0
5
1
C
o
r
e
Timer 0
Timer 1
Timer 2
CP0
CP1
P1.0/CP0+
P1.1/CP0-
P1.2/CP0
P1.3/CP1+
P1.4/CP1-
P1.5/CP1
P1.6/SYSCLK
P1.7
P
1
D
r
v
P0.0/TX
P0.1/RX
P0.2//INT0
P0.3//INT1
P0.4/T0
P0.5/T1
P0.6/T2
P0.7/T2EX
P
0
D
r
v
P
3
D
r
v
P2.0/SCK
P2.1/MISO
P2.2/MOSI
P2.3/NSS
P2.4
P2.5
P
2
D
r
v
CP0+
CP0-
CP1+
CP1-
P
0
M
U
X
VDD
GND
Reset
/RST
XTAL1
XTAL2
External
Oscillator
Circuit
System Clock
Internal
Oscillator
Analog/Digital
Power
Debug HW
P
1
M
U
X
CP0
CP1
P
2
M
U
X
SPI
NC
WDT
SYSCLK
8051-COMPATIBLE µ
µµ
µC Core
- Pipelined Instruction Architecture; Executes 70%
of Instructions in 1 or 2 System Clocks
- Up to 25MIPS Throughput with 25MHz Clock
- Expanded Interrupt Handler
MEMORY
- 256 Bytes Data RAM
- 8k Bytes FLASH; In-System Programmable in 512
byte Sectors
DIGITAL PERIPHERALS
- 22 Port I/O; All are 5V tolerant
- Hardware SPITM and UART Serial Ports Available
Concurrently
- Three 16-bit Counter/Timers
- Dedicated Watch-Dog Timer
- Bi-directional Reset
CLOCK SOURCES
- Internal Programmable Oscillator: 2-to-16MHz
- External Oscillator: Crystal, RC, C, or Clock
- Can Switch Between Clock Sources on-the-fly;
Useful in Power Saving Modes
SPI is a trademark of Motorola, Inc.
ANALOG PERIPHERALS
Two Comparators
- Programmable Hysteresis
- Configurable to Generate Interrupts or Reset
VDD Monitor and Brown-out Detector
ON-CHIP JTAG DEBUG
- On-Chip Debug Circuitry Facilitates Full Speed,
Non-Intrusive In-System Debug (No Emulator
Required!)
- Provides Breakpoints, Single Stepping,
Watchpoints, Stack Monitor
- Inspect/Modify Memory and Registers
- Superior Performance to Emulation Systems Using
ICE-Chips, Target Pods, and Sockets
- Low Cost, Complete Development Kit
SUPPLY VOLTAGE ......................2.7V to 3.6V
- Typical Operating Current: 9mA @ 25MHz
- Typical Stop Mode Current: <0.1uA
Temperature Range: –40°
°°
°C to +85°
°°
°C
32-Pin LQFP Package
7.15.2002
C8051F231
8K Flash, 256 RAM, 32-Pin MCU
PRELIMINAR
Y
SELECTED ELECTRICAL SPECIFICATIONS TA = -40°C to +85°C, VDD = 2.7V unless otherwise specified.
PARAMETER CONDITIONS MIN TYP MAX UNITS
GLOBAL CHARACTERISTICS
Supply Voltage 2.7 3.6 V
Supply Current (CPU
active)
Clock=25MHz
Clock=1MHz
Clock=32kHz; VDD Monitor Disabled
9
0.4
11
mA
mA
µA
Supply Current (shutdown) Oscillator not running; VDD Monitor
Enabled
Oscillator not running; VDD Monitor
Disabled
10
0.1
µA
µA
Clock Frequency Range DC 25 MHz
COMPARATORS
Supply Current (each comparator) 1.5
µA
Response Time (CP+) – (CP-) = 100mV 4.0 µs
PACKAGE INFORMATION
A
A1
A2
b
D
D1
e
E
E1
-
0.05
1.35
0.30
-
-
-
-
-
-
-
1.40
0.37
9.00
7.00
0.80
9.00
7.00
1.60
0.15
1.45
0.45
-
-
-
-
-
MIN
(mm)
NOM
(mm)
MAX
(mm)
PIN 1
IDENTIFIER
A1
eb
1
32
E1
D1
D
E
A2
A
C8051F226DK DEVELOPMENT KIT
