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AT89C51AC3-RDTIM Datasheet(PDF) 34 Page - ATMEL Corporation

Part # AT89C51AC3-RDTIM
Description  Enhanced 8-bit Microcontroller with 64KB Flash Memory
PDF  141 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C51AC3-RDTIM Datasheet(HTML) 34 Page - ATMEL Corporation

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34
AT89C51AC3
4383A–8051–10/04
Registers
Table 10. PCON Register
PCON (S87:h) Power configuration Register
Reset Value= XXXX 0000b
7654
3210
----
GF1
GF0
PD
IDL
Bit
Number
Bit
Mnemonic
Description
7-4
-
Reserved
The value read from these bits is indeterminate. Do not set these bits.
3GF1
General Purpose flag 1
One use is to indicate whether an interrupt occurred during normal operation or
during Idle mode.
2GF0
General Purpose flag 0
One use is to indicate whether an interrupt occurred during normal operation or
during Idle mode.
1PD
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.
0IDL
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.



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