Datasheet

505
42023E–SAM–07/2013
ATSAM4L8/L4/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
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.
EXTINTn/NMI
CLK_SYNC
ISR.INTn:
rising EDGE or high
LEVEL
EIC_WAKE:
rising EDGE or high
LEVEL
EXTINTn/NMI
CLK_SYNC
ISR.IN Tn:
rising EDGE or high
LEVEL
EIC_WAKE:
rising EDGE or high
LEVEL