AT87F51RC-20JI データシートの表示（PDF） - Atmel Corporation

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AT87F51RC-20JI

8-bit Microcontroller with 32K Bytes QuickFlash™

Atmel Corporation 

user programmed by a conventional nonvolatile memory

programmer. A total of 512 bytes of internal RAM are avail-

able in the AT87F51RC. The 256-byte expanded internal

RAM is accessed via MOVX instructions after clearing bit 1

in the SFR located at address 8EH. The other 256-byte

RAM segment is accessed the same way as the Atmel

AT89-series and other 8052-compatible products. By com-

bining a versatile 8-bit CPU with QuickFlash on a mono-

lithic chip, the Atmel AT87F51RC is a powerful

microcomputer which provides a highly-flexible and cost-

effective solution to many embedded control applications.

Block Diagram

P0.0 - P0.7

P2.0 - P2.7

VCC

GND

PORT 0 DRIVERS

PORT 2 DRIVERS

RAM ADDR.

REGISTER

RAM

PORT 0

LATCH

PORT 2

LATCH

QUICK

FLASH

B

REGISTER

ACC

STACK

POINTER

PROGRAM

ADDRESS

REGISTER

PSEN

ALE/PROG

EA / VPP

RST

TMP2

TMP1

ALU

PSW

INTERRUPT, SERIAL PORT,

AND TIMER BLOCKS

TIMING

AND

CONTROL

INSTRUCTION

REGISTER

OSC

WATCH

DOG

PORT 1

LATCH

PORT 1 DRIVERS

PORT 3

LATCH

PORT 3 DRIVERS

P1.0 - P1.7

P3.0 - P3.7

BUFFER

PC

INCREMENTER

PROGRAM

COUNTER

DUAL

DPTR

2

AT87F51RC

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