T89C51CC01 Atmel, T89C51CC01 Datasheet - Page 25

• Manufacturer Part Number: T89C51CC01
• Description: Enhanced 8-Bit Microcontroller
• Manufacturer: Atmel

Registers
4129K–CAN–01/05
Table 15. PCON Register
PCON (S:87h) – Power configuration Register
Reset Value = 00X1 0000b
Number
SMOD1
Bit
7
7
6
5
4
3
2
1
0
Mnemonic Description
SMOD0
SMOD1
SMOD0
POF
GF1
GF0
Bit
IDL
PD
6
-
Serial port Mode bit 1
Set to select double baud rate in mode 1, 2 or 3
Serial port Mode bit 0
Clear to select SM0 bit in SCON register.
Set to select FE bit in SCON register.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Power-Off Flag
Clear to recognize next reset type.
Set by hardware when V
software.
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
-
POF
4
cc
rises from 0 to its nominal voltage. Can also be set by
GF1
3
GF0
2
T89C51CC01
PD
1
IDL
0
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