C509-L_97 SIEMENS [Siemens Semiconductor Group], C509-L_97 Datasheet - Page 228

• Manufacturer Part Number: C509-L_97
• Description: 8-Bit CMOS Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

9.2
The SFR PCON is used for control of the power saving modes. It also contains two general purpose
flags, which can be used e.g. by software for power saving mode management.
Special Function Register PCON (Address 87 H )
Bit
PDS
IDLS
SD
GF1
GF0
PDE
IDLE
Semiconductor Group
Power Saving Mode Control Register PCON
87 H
Bit No. MSB
The shaded bits are not used for power saving mode control.
SMOD
Function
Power down start bit
The instruction that sets the PDS flag bit is the last instruction before entering the
power down mode.
IDLE start bit
The instruction that sets the IDSL flag bit is the last instruction before entering the
idle mode.
Slow down bit
When set, the slow-down mode is enabled.
General purpose flag
General purpose flag
Power down enable bit
When set, starting the power down mode is enabled.
Idle mode enable bit
When set, starting the idle mode is enabled.
7
PDS
6
IDLS
5
SD
4
9-3
GF1
3
GF0
2
PDE
1
Power Saving Modes
IDLE
LSB
0
Reset Value : 00 H
PCON
1997-10-01
C509-L