P87C51RD2FA datasheet(5/67 Pages) PHILIPS

Part #	P87C51RD2FA

Description	80C51 Central Processing Unit

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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Philips Semiconductors

Product data

P87C51RA2/RB2/RC2/RD2

80C51 8-bit microcontroller family 8KB/16KB/32KB/64KB OTP

with 512B/1KB RAM, low voltage (2.7 to 5.5 V), low power, high

speed (30/33 MHz)

2003 Jan 24

5

BLOCK DIAGRAM (CPU-ORIENTED)

SU01658

PSEN

EAVPP

ALE

RST

XTAL1

XTAL2

VCC

VSS

PORT 0

DRIVERS

PORT 2

DRIVERS

RAM ADDR

REGISTER

RAM

PORT 0

LATCH

PORT 2

LATCH

OTP

MEMORY

REGISTER

B

ACC

STACK

POINTER

TMP2

TMP1

ALU

TIMING

AND

CONTROL

PD

OSCILLATOR

PSW

PORT 1

LATCH

PORT 3

LATCH

PORT 1

DRIVERS

PORT 3

DRIVERS

PROGRAM

ADDRESS

REGISTER

BUFFER

PC

INCRE-

MENTER

PROGRAM

COUNTER

DPTR’S

MULTIPLE

P1.0–P1.7

P3.0–P3.7

P0.0–P0.7

P2.0–P2.7

SFRs

TIMERS

P.C.A.

8

16

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P87C51RD2FA Datasheet(PDF) 5 Page - NXP Semiconductors

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