Hi Gokhan, Each ACK only correlates to a specific ePIE group. There are no ACKs for individual interrupts inside groups. Each time an ISR is branched to, the ACK for the entire group will be "opened" automatically, which blocks other interrupts from the group from propagating during the execution of the ISR. I would recommend keeping your code as is, this is the recommended use. Best Regards, Delaney
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