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T89C51RD2-3CWC-M Datasheet(PDF) 42 Page - ATMEL Corporation

Part # T89C51RD2-3CWC-M
Description  0 to 40MHz Flash Programmable 8-bit Microcontroller
PDF  86 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

T89C51RD2-3CWC-M Datasheet(HTML) 42 Page - ATMEL Corporation

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42
Rev. F - 15 February, 2001
T89C51RD2
This table shows the state of ports during idle and power-down modes.
* Port 0 can force a 0 level. A "one" will leave port floating.
Mode
Program
Memory
ALE
PSEN
PORT0
PORT1
PORT2
PORT3
Idle
Internal
1
1
Port Data*
Port Data
Port Data
Port Data
Idle
External
1
1
Floating
Port Data
Address
Port Data
Power Down
Internal
0
0
Port Dat*
Port Data
Port Data
Port Data
Power Down
External
0
0
Floating
Port Data
Port Data
Port Data



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