T89C51RD2-3CBC-L ATMEL [ATMEL Corporation], T89C51RD2-3CBC-L Datasheet - Page 42
T89C51RD2-3CBC-L
Manufacturer Part Number
T89C51RD2-3CBC-L
Description
0 to 40MHz Flash Programmable 8-bit Microcontroller
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.T89C51RD2-3CBC-L.pdf
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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.
42
Power Down
Power Down
Mode
Idle
Idle
Program
Memory
External
External
Internal
Internal
ALE
1
1
0
0
PSEN
1
1
0
0
Port Data*
Port Dat*
PORT0
Floating
Floating
Port Data
Port Data
Port Data
Port Data
PORT1
Rev. F - 15 February, 2001
Port Data
Port Data
Port Data
PORT2
Address
Port Data
Port Data
Port Data
Port Data
PORT3
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