Datasheet

333
SAM9261 [DATASHEET]
Atmel-6062O-ATARM-SAM9261-Datasheet_21-Jun-16
When the software reads PIO_ISR, all the interrupts are automatically cleared. This signifies that all the interrupts
that are pending when PIO_ISR is read must be handled.
Figure 28-6. Input Change Interrupt Timings
MCK
Pin Level
Read PIO_ISR
APB Access
PIO_ISR
APB Access