Power Saving Mode Entering/Exiting Condition - Samsung S3C2416 User Manual

SYSTEM CONTROLLER
6.5

POWER SAVING MODE ENTERING/EXITING CONDITION

Table 2-8 shows that Power Saving mode state and Entering or Exiting condition. In general, the entering
conditions are set by the main CPU.
Pleas refer to power-related registers(PWRMODE, PWRCFG and WKUPSTAT) before adopting power saving
scheme on your system.
In dealing with sleep mode, It is good for you to know following two restrictions. To enter sleep mode by
BATT_FLT, you have to configure BATF_CFG bits of PWRCFG register. Not to exit from sleep mode when
BATT_FLT is LOW, you have to configure SLEEP_CFG bit of PWRCFG register.
Power down mode
Clock Gating at NORMAL
IDLE
STOP
SLEEP
2-20
Table 2-8. Power Saving Mode Entering/Exiting Condition
Enter
Clear a respective clock
on/off bit for each IP to save
power.
STANDBYWFI
CMD
CMD
S3C2416X RISC MICROPROCESSOR
Exit
Set a respective clock on/off bit for each IP to
operate normally
1. All interrupt sources
2. RTC alarm
3. RTC Tick
4. BATT_FLT
1. EINT[15:0] (External Interrupt)
2. RTC alarm
3. RTC Tick
4. BATT_FLT
1. EINT[15:0] (External Interrupt)
2. RTC alarm
3. RTC Tick
4. BATT_FLT