Pin change interrupts are supported for all pins on ports PA, PB, PC, PD and PE except for PA0, PA1, PA7 and PD7. The higher ports PF..PJ (high pin count CPUs only) don't support interrupts. Pin ...
Related to being powered by a super capacitor, I also need to get my ATtiny to go to sleep when not processing anything. And that involves setting pins to ‘interrupt-on-change’ and getting the chip to ...
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