89C51 Philips Semiconductors, 89C51 Datasheet - Page 3

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89C51

Manufacturer Part Number

89C51

Description

80C51 8-bit microcontroller family 4K/8K/16K/32K Flash

Manufacturer

Philips Semiconductors

Datasheet

1.89C51.pdf (32 pages)

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Philips Semiconductors

BLOCK DIAGRAM

1999 Oct 27

80C51 8-bit microcontroller family

4K/8K/16K/32K Flash

EAV

PSEN

RST

ALE

PP

V

V

CC

SS

XTAL1

CONTROL

REGISTER

TIMING

RAM ADDR

REGISTER

OSCILLATOR

AND

B

PD

XTAL2

RAM

ACC

TMP2

DRIVERS

P1.0–P1.7

PORT 1

PORT 1

LATCH

PSW

DRIVERS

P0.0–P0.7

PORT 0

PORT 0

LATCH

ALU

TMP1

3

TIMERS

SFRs

P2.0–P2.7

DRIVERS

PORT 2

PORT 2

LATCH

89C51/89C52/89C54/89C58

POINTER

DRIVERS

STACK

P3.0–P3.7

PORT 3

PORT 3

LATCH

FLASH

8

PROGRAM

REGISTER

PROGRAM

MULTIPLE

ADDRESS

COUNTER

MENTER

DPTR’S

INCRE-

BUFFER

PC

8

Product specification

SU01066

16

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