A lockup can occur when the zero_out_integrity_word function works, but PMBus communication fails because the zero_out_integrity_word normally gets triggered by a PMBus command.

To debug, place a back-door at the beginning of the application code as shown in the following. This is to make sure the device is able to recover when the back-door condition is met.

void main()
{
	volatile unsigned int dummy;
	if(GioRegs.FAULTIN.bit.FLT3_IN == 0)// Re-Check pin assignment 
	{
		clear_integrity_word();
}
}