Almost all micros have brown out detection so you can tell if the device undervolts, and typically you can force the device to auto shut down/reset if that cond

Almost all micros have brown out detection so you can tell if the device undervolts, and typically you can force the device to auto shut down/reset if that condition trips using an onboard programmable fuse. I don't know how much of an attack surface your typical BOD circuit is though. https://microchipdeveloper.com/8avr:bod https://microchipdeveloper.com/8avr:bod