AT80C51RA2 查看數據表（PDF） - Atmel Corporation

零件编号

产品描述 (功能)

生产厂家

AT80C51RA2

High Performance 8-bit Microcontrollers

Atmel Corporation 

3. Block Diagram

AT/TS8xC51Rx2

XTAL1

XTAL2

ALE/PROG

PSEN

EA/VPP

RD (3)

WR (3)

(3) (3)

(1) (1) (1) (1)

EUART

RAM

256x8

ROM

/EPROM

XRAM

0/16/32/64Kx8 256/768x8

PCA

Timer2

CPU

C51

CORE

IB-bus

Timer 0 INT

Timer 1 Ctrl

(3) (3) (3) (3)

Parallel I/O Ports & Ext. Bus

Port

0

Port

1

Port

2

Port

3

Port

(2)

4

Port

(2)

5

Watch

Dog

(1): Alternate function of Port 1

(2): Only available on high pin count packages

(3): Alternate function of Port 3

3

4188F–8051–01/08

Share Link: