TS87C51RB2-VCKB 查看數據表（PDF） - Atmel Corporation

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TS87C51RB2-VCKB

High Performance 8-bit Microcontrollers

Atmel Corporation 

TS80C51RA2/RD2

TS83C51RB2/RC2/RD2

TS87C51RB2/RC2/RD2

Table 22. The state of ports during idle and power-down mode

Mode

Idle

Idle

Power Down

Power Down

Program

Memory

Internal

External

Internal

External

ALE

1

1

0

0

PSEN

1

1

0

0

PORT0

Port Data*

Floating

Port Data*

Floating

PORT1

Port Data

Port Data

Port Data

Port Data

PORT2

Port Data

Address

Port Data

Port Data

PORT3

Port Data

Port Data

Port Data

Port Data

* Port 0 can force a "zero" level. A "one" will leave port floating.

Rev. C - 06 March, 2001

45

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