Traditionally, the detection of the PC pointer is achieved by jumping to a specified function address through the self-test program and then comparing the returned address with the preset address. If the addresses are the same, the self-check passes. The essence of this check is to verify the correctness of function jumps.

In actual applications, watchdogs are enabled and watchdog feeding operations are performed in fixed-frequency interrupts. Therefore, entering the watchdog interrupt to perform feeding indicates that the PC pointer is functioning properly. If the PC pointer fails, a reset caused by watchdog timer overflow occurs, achieving the same protective purpose. Therefore, the PC pointer is usually not individually self-checked. The detection of the PC pointer can be combined with enabling the watchdog and explained in the documentation provided to the certification agency.