137
8331B–AVR–03/12
Atmel AVR XMEGA AU
Figure 12-2. Interrupt execution of a multicycle instruction.
If an interrupt occurs when the device is in sleep mode, the interrupt execution response time is
increased by five clock cycles. In addition, the response time is increased by the start-up time
from the selected sleep mode.
A return from an interrupt handling routine takes four to five clock cycles, depending on the size
of the program counter. During these clock cycles, the program counter is popped from the stack
and the stack pointer is incremented.
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