at89c5131 ATMEL Corporation, at89c5131 Datasheet - Page 150

• Manufacturer Part Number: at89c5131
• Description: 8-bit Flash Microcontroller With Full Speed Usb Device At89c5131
• Manufacturer: ATMEL Corporation

Registers
148
AT89C5131
Table 106. PCON Register
PCON (S:87h)
Power Control Register
Reset Value = 10h
Bit Number
SMOD1
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
Set to select FE bit in SCON register.
Clear to select SM0 bit in SCON register
Reserved
The value read from this bit is always 0. Do not set this bit.
Power-Off Flag
Set by hardware when V
software.
Clear to recognize next reset type.
General-purpose Flag 1
Set by software for general-purpose usage.
Cleared by software for general-purpose usage.
General-purpose Flag 0
Set by software for general-purpose usage.
Cleared by software for general-purpose usage.
Power-down mode bit
Set this bit to enter in power-down mode.
Cleared by hardware when reset occurs.
Idle mode bit
Set this bit to enter in Idle mode.
Cleared by hardware when interrupt or reset occurs.
5
-
POF
4
CC
rises from 0 to its nominal voltage. Can also be set by
GF1
3
GF0
2
PD
1
4136C–USB–04/05
IDL
0