Samsung S3C2451X User Manual page 96

SYSTEM CONTROLLER
POWER MANAGEMENT REGISTERS (PWRMODE AND PWRCFG)
If you want to change the power management mode, you just write a bit(s) into PWRMODE register. Before
writing, you must configure condition to wake-up from the power down mode.
Register
PWRMODE 0x4C00_0040
PWRCFG 0x4C00_0060
S3C2451X consists of three power-down modes, which are IDLE, STOP, and SLEEP. The mode transition from
the NORMAL mode occurs when the appropriate value is written into PWRMODE register. If software tries to write
illegal value, i.e., tries to set multiple power modes concurrently, then the write operation will be ignored.
PWRMODE
RESERVED
IDLE
STOP
SLEEP
Preliminary product information describe products that are in development,
2-30
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
Address R/W
R/W
R/W
Bit
[31:18] RESERVED
[17] The system enters into IDLE mode when this field is set to '1'.
The system enters into STOP mode when this field is set to
[16]
'1'.
The system enters into SLEEP mode when this field is set to
[15:0]
'0x2BED'. The bit pattern, '0x2BED', represents "Go To BED".
Description
Power mode control register
Power management configuration register
Description
S3C2451X RISC MICROPROCESSOR
Reset Value
0x0000_0000
0x0000_0000
Initial Value
0x0_0000
0
0
0