87C654 Philips Semiconductors, 87C654 Datasheet - Page 6

• Manufacturer Part Number: 87C654
• Description: 80C51 8-bit microcontroller 8K/16K/ 256 OTP/ I2C
• Manufacturer: Philips Semiconductors

Philips Semiconductors
BLOCK DIAGRAM
1996 Aug 16
CMOS single-chip 8-bit microcontroller
INTERRUPTS
INT0
EXTERNAL
XTAL2
OSCILLATOR
FREQUENCY
REFERENCE
INT1
TIMING
INTERRUPTS
AND
CPU
INTERNAL
XTAL1
64K BYTE BUS
EXPANSION
CONTRTOL
PROGRAM
CONTROL
MEMORY
EPROM)
(16K x 8
PROGRAMMABLE I/O
ADDRESS/DATA BUS
PARALLEL PORTS,
(256 x 8 RAM)
AND I/O PINS
MEMORY
DATA
6
SERIAL IN
SYNCHRONOUS SHIFT
PROG SERIAL PORT
FULL DUPLEX UART
TIMER/EVENT
SHARED WITH
T0
TWO 16-BIT
COUNTERS
COUNTERS
PORT 3
SERIAL OUT
T1
I
2
C SERIAL I/O
Product specification
87C654
SDA
SCL
SHARED
SU00271
PORT 1
WITH