AT89C51RB2-3CSUM 데이터 시트보기 (PDF) - Atmel Corporation

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AT89C51RB2-3CSUM

8-bit Microcontroller with 16K/32K Bytes Flash

Atmel Corporation 

Block Diagram

Figure 1. Block Diagram

AT89C51RB2/RC2

XTAL1

XTAL2

ALE/PROG

PSEN

EA

RD (2)

WR (2)

(2) (2)

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

EUART

+

BRG

RAM

256x8

Flash

32Kx8 or

16Kx8

XRAM

1Kx8

Boot

ROM

2Kx8

CPU

C51

CORE

IB-bus

PCA Timer2

Timer 0 INT

Timer 1 Ctrl

Parallel I/O Ports & Ext. Bus

Port 0Port 1 Port 2 Port 3

Watch Key

Dog Board

SPI

(2) (2) (2) (2)

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

Notes: 1. Alternate function of Port 1.

2. Alternate function of Port 3.

3

4180E–8051–10/06

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