SAM3U Datasheet, PDF (22/59 Pages) ATMEL Corporation – AT91SAM ARM-based Flash MCU

5.6 Wake-up Sources
The wake-up events allow the device to exit backup mode. When a wake-up event is detected,
the Supply Controller performs a sequence which automatically reenables the core power
supply.
Figure 5-4. Wake-up Source
sm_int
SMEN
rtc_alarm
RTCEN
rtt_alarm
RTTEN
FWUP
Falling
Edge
Detector
FWUPEN
SLCK
FWUPDBC
Debouncer
FWUP
Core
Supply
Restart
WKUP0
WKUP1
WKUP15
WKUPT0
Falling/Rising
Edge
Detector
WKUPT1
Falling/Rising
Edge
Detector
WKUPT15
Falling/Rising
Edge
Detector
WKUPEN0 WKUPIS0
WKUPEN1 WKUPIS1
WKUPEN15 WKUPIS15
SLCK
WKUPDBC
Debouncer
WKUPS
22 SAM3U Series
6430ES–ATARM–22-Aug-11