Samsung S5PC100 User Manual page 218

S5PC100 USER'S MANUAL (REV1.0)
5 WAKEUP SOURCES
Power mode
DEEP-IDLE
DEEP-STOP
(1)
If an external interrupt source is used as a wakeup source, the corresponding wakeup mask bit should be
unmasked in EINT_WAKEUP_MASK in Chapter 2.4 Power Management and WKUP_INT function should be selected
in GPH[0~3]CON and delay filter should be enabled in WKUP_INT[0~3]_FLTCON[0~1] in Chapter 2.2 Pad Control.
5.1 INTERNAL INTERRUPTS
All internal interrupts are wakeup sources in IDLE or DEEP_IDLE (Top domain on) mode.
5.2 EXTERNAL INTERRUPTS
External interrupts are the common wake-up source of all power down modes. The logic for external interrupt
configuration such as polarity, edge/level sensitivity, and masking resides in the GPIO and can be modified
through GPIO register setting before entering one of power down modes mentioned above. For more details, refer
to 2.2 GPIO manual.
The external interrupt handling logic holds the external interrupt information until Cortex-A8 clears it. It allows
Cortex-A8 to handle the external interrupt after wake up.
5.3 MODEM_IF
The Base-band Modem Chip can wakeup Application Processor such as S5PC100 in power down mode as
specified in Table 2.4-7. For more information of detailed wakeup sequence, refer to Chapter 8.11 MODEM
INTERFACE manual.
Table 2.4-7 Summary of Power Mode Wakeup Sources
IDLE
STOP /
SLEEP
Wakeup sources
IRQ (signal from ARM to VIC)
I2S (in audio domain)
MMC0, MMC1, MMC2
TS_PENDN
MODEM_IF
HSI
System Timer
External interrupt sources
RTC Alarm
TICK
Key
Battery Fault
Power Management
(1)
2.4-19