SAM4L Datasheet, PDF (499/1185 Pages) ATMEL Corporation – ATSAM ARM-based Flash MCU

ATSAM4L4/L2
When CLK_SYNC is stopped only asynchronous interrupts remain active, and any short spike
on this interrupt will wake up the device. EIC_WAKE will restart CLK_SYNC and ISR will be
updated on the first rising edge of CLK_SYNC.
Figure 21-4. Timing Diagram, Asynchronous Interrupts
CLK_SYNC
E X T IN T n/N M I
IS R .IN T n:
risin g E D G E o r h ig h
LEVEL
E IC _W A K E :
risin g E D G E o r h ig h
LEVEL
CLK_SYNC
E X T IN T n/N M I
IS R .IN T n:
risin g E D G E o r h ig h
LEVEL
E IC _W A K E :
risin g E D G E o r h ig h
LEVEL
21.6.5 Wakeup
The external interrupts can be used to wake up the part from power save modes if the corre-
sponding bit in IMR is one.
42023C–SAM–02/2013
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