I have MC13213 port pins PTA0(pin 62) and PTA1(pin 62) configured as digital active-low inputs with internal pullup enabled for each pin. Sometimes they would all of the sudden stuck low, measuring <0.04V & <100Ohms short to GND, and fail. Even power cycling the chip would not get rid of the problem. Has anyone come across this strange behavior and know what is the cause? We have identical circuits to other PTA# pins but none of the other pins would exhibit this failure.