Samsung S3C2451X User Manual page 97

S3C2451X RISC MICROPROCESSOR
PWRCFG register controls the configuration of power mode transition.
PWRCFG
RESERVED
DEEP-STOP
SLEEP_CFG
RESERVED
NFRESET_CFG
RTC_CFG
RTCTICK_CFG
RESERVED
nSW_PHY_
OFF_USB
OSC_EN_SLP
OSC_EN_STOP
BATF_CFG
Bit
[31:17] -
Enable the system enters DEEP-STOP mode.
If user set 16th registerof PWRMODE reg. (ie. STOP) while
this bit is configured to '1', the system enters DEEP-STOP
[16]
mode not STOP mode. To enter the DEEP-STOP mode
properly, this bit should be configured prior to setting STOP
mode bit.
Enable wakeup source
0 = wakeup sources are enabled depending on BATT_FLT in
sleep mode. If BATT_FLT pin is asserted logic '1' system can
[15] be exit from sleep mode by appropriate wakeup sources. If
not, system continuously remain it's sleep state.
1 = enable wakeup sources regardless of BATT_FLT in sleep
mode.
[14:10] -
Reset configuration when internal resets is generated
[9] 0 = reset NAND flash controller.
1 = do not reset NAND flash controller.
Configure RTC alarm interrupt wakeup mask
0 = wake-up signal event is generated when RTC alarm
[8]
occurs.
1 = mask RTC alarm interrupt
Configure RTC Tick interrupt wakeup mask
[7] 0 = wake-up signal event is generated when RTC Tick occurs.
1 = mask RTC alarm interrupt
[6:5] -
Power on/off of usb phy.
(see USB manual to get more details.)
[4]
0: OFF
1: ON
Crystal oscillator enable bit in SLEEP mode
[3]
0 = disable in SLEEP mode, 1 = enable in SLEEP mode
Crystal oscillator enable bit in STOP mode
[2]
0 = disable in STOP mode, 1 = enable in STOP mode
Configure BATT_FLT operation
00, 10 = ignore,
01 = generate interrupt in idle mode,
[1:0]
can be used as a wakeup source in stop and sleep
mode
when BATT_FLT is asserted (active LOW)
11 = reserved (Please don't use)
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
Description
SYSTEM CONTROLLER
Initial Value
0x0000
0
0
0x00
0
0
0
0
0
0
0
0x0
2-31