P83C851IBB datasheet(3/22 Pages) PHILIPS

Part #	P83C851IBB

Description	CMOS single-chip 8-bit microcontroller with on-chip EEPROM

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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Philips Semiconductors

Product specification

80C851/83C851

CMOS single-chip 8-bit microcontroller

with on-chip EEPROM

1998 Jul 03

3

BLOCK DIAGRAM

64K BYTE BUS

EXPANSION

CONTRTOL

PROG SERIAL PORT

FULL DUPLEX UART

SYNCHRONOUS SHIFT

PROGRAMMABLE I/O

CPU

OSCILLATOR

AND

TIMING

PROGRAM

MEMORY

(4K x 8 ROM)

DATA

MEMORY

(128 x 8 RAM)

TWO 16-BIT

TIMER/EVENT

COUNTERS

T0

T1

COUNTERS

XTAL2

XTAL1

FREQUENCY

REFERENCE

INTERNAL

INTERRUPTS

INT0

INT1

EXTERNAL

INTERRUPTS

CONTROL

PARALLEL PORTS,

ADDRESS/DATA BUS

AND I/O PINS

SERIAL IN

SERIAL OUT

SHARED WITH

PORT 3

EEPROM

(256 x 8)

LOGIC SYMBOL

ADDRESS AND

DATA BUS

ADDRESS BUS

RxD

TxD

INT0

INT1

T0

T1

WR

RD

RST

EA

PSEN

ALE

VSS

XTAL1

XTAL2

VDD

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