I met critical input interrupt when develop my project on MPC5748G. In the datasheet, it is not so clear about why this happen. What is the pin number? And what are the reasons that will cause this interrupt?
A Critical Input exception is signaled to the processor by the assertion of the critical
interrupt pin. If the exception is enabled by MSRCE, the Critical Input interrupt is taken.
A Critical Input interrupt may be delayed by other higher priority exceptions or if MSRCE
is cleared when the exception occurs.