80C528 Datasheet, PDF (6/26 Pages) NXP Semiconductors – CMOS single-chip 8-bit microcontroller

Philips Semiconductors
CMOS single-chip 8-bit microcontrollers
Product specification
80C528/83C528
BLOCK DIAGRAM
FREQUENCY
REFERENCE
XTAL2 XTAL1
OSCILLATOR
AND
TIMING
PROGRAM
MEMORY
(32K x 8 ROM)
RAM
DATA
MEMORY
(256 x 8)
AUX–RAM
DATA
MEMORY
(256 x 8)
COUNTERS
T0
T1
T2 T2EX
RST
TWO 16-BIT
TIMER/EVENT
COUNTERS
16-BIT TIMER /
EVENT COUNTER
WATCHDOG
TIMER
CPU
INTERNAL
INTERRUPTS
64K-BYTE BUS
EXPANSION
CONTROL
INT0 INT1
EXTERNAL
INTERRUPTS
CONTROL
PROGRAMMABLE I/O
PROGRAMMABLE
SERIAL PORT
FULL DUPLEX UART
SYNCHRONOUS SHIFT
BIT-LEVEL
I²C
INTERFACE
PARALLEL PORTS,
ADDRESS/DATA BUS
AND I/O PINS
SERIAL IN
SERIAL OUT
SHARED WITH
PORT 3
SDA SCL
1995 Feb 02
6