87C654 Datasheet, PDF (6/28 Pages) NXP Semiconductors – CMOS single-chip 8-bit microcontroller

Philips Semiconductors
CMOS single-chip 8-bit microcontroller
BLOCK DIAGRAM
FREQUENCY
REFERENCE
XTAL2 XTAL1
OSCILLATOR
AND
TIMING
PROGRAM
MEMORY
(16K x 8
EPROM)
DATA
MEMORY
(256 x 8 RAM)
COUNTERS
T0
T1
TWO 16-BIT
TIMER/EVENT
COUNTERS
Product specification
87C654
CPU
I²C SERIAL I/O
SDA _SHARED
WITH
SCL ^{PORT 1}
INTERNAL
INTERRUPTS
64K BYTE BUS
EXPANSION
CONTRTOL
PROGRAMMABLE I/O
PROG SERIAL PORT
FULL DUPLEX UART
SYNCHRONOUS SHIFT
INT0 INT1
EXTERNAL
INTERRUPTS
CONTROL
PARALLEL PORTS,
ADDRESS/DATA BUS
AND I/O PINS
SERIAL IN SERIAL OUT
SHARED WITH
PORT 3
SU00271
1996 Aug 16
6