AT89C51RD2-RDTIM Atmel, AT89C51RD2-RDTIM Datasheet - Page 83
AT89C51RD2-RDTIM
Manufacturer Part Number
AT89C51RD2-RDTIM
Description
MCU 8-Bit AT89 80C51 CISC 64KB Flash 3.3V/5V 64-Pin VQFP Tray
Manufacturer
Atmel
Datasheet
1.AT89C51RD2-RDTIM.pdf
(137 pages)
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18.4
4235J–8051–01/08
Registers
Table 18-2.
Reset Value= XXXX 0000b
Bit Number
7-4
7
3
2
1
0
-
Mnemonic
PCON Register
PCON (S87:h) Power configuration Register
GF1
GF0
IDL
PD
Bit
6
-
-
Description
Reserved
The value read from these bits is indeterminate. Do not set these bits.
General Purpose flag 1
One use is to indicate whether an interrupt occurred during normal operation or during
Idle mode.
General Purpose flag 0
One use is to indicate whether an interrupt occurred during normal operation or during
Idle mode.
Power-Down Mode bit
Cleared by hardware when an interrupt or reset occurs.
Set to activate the Power-Down mode.
If IDL and PD are both set, PD takes precedence.
Idle Mode bit
Cleared by hardware when an interrupt or reset occurs.
Set to activate the Idle mode.
If IDL and PD are both set, PD takes precedence.
5
-
4
-
GF1
3
AT89C51RD2/ED2
GF0
2
PD
1
IDL
0
83
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