Datasheet

369
32142D–06/2013
ATUC64/128/256L3/4U
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 17-4. Timing Diagram, Asynchronous Interrupts
17.6.5 Wakeup
The external interrupts can be used to wake up the part from sleep modes. The wakeup can be
interpreted in two ways. If the corresponding bit in IMR is one, then the execution starts at the
interrupt handler for this interrupt. If the bit in IMR is zero, then the execution starts from the next
instruction after the sleep instruction.
EXTINTn/NMI
CLK_SYNC
ISR.INTn:
rising EDGE or high
LEVEL
EIC_WAKE:
rising EDGE or high
LEVEL
EXTINTn/NMI
CLK_SYNC
ISR.INTn:
rising EDGE or high
LEVEL
EIC_WAKE:
rising EDGE or high
LEVEL