T89C51RB2 데이터 시트보기 (PDF) - Atmel Corporation

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T89C51RB2

8-bit Microcontroller with 16 Kbytes/ 32 Kbytes FLASH

Atmel Corporation 

T89C51RB2/RC2

• Hardware Watchdog Timer (One-time enabled with Reset-Out)

• Power control modes:

• Idle Mode.

• Power-down mode.

- 50µA at 3V

- 100µA Commercial at 5V

- 150µA Industrial at 5V

• Power-Off Flag.

• Power supply: 4.5 to 5.5V or 2.7 to 3.6V

• Temperature ranges: Commercial (0 to +70°C) and industrial (-40°C to +85°C).

• Packages: PDIL40, PLCC44, VQFP44

Table 1. Memory Size

Flash (bytes)

XRAM (bytes)

TOTAL RAM

(bytes)

I/O

T89C51RB2

16k

1024

1280

32

T89C51RC2

32k

1024

1280

32

3. Block Diagram

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

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

Parallel I/O Ports & Ext. Bus

Watch Key

Dog Board

SPI

Port 0 Port 1 Port 2 Port 3 Port I2

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

(1): Alternate function of Port 1

(2): Alternate function of Port 3

2

Rev. B - 30-Mar-01

Preliminary

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