SWCU194 March 2023 CC1314R10 , CC1354P10 , CC1354R10 , CC2674P10 , CC2674R10
The processor enters a lockup state if a fault occurs when it cannot be serviced or escalated. When the processor is in lockup state, it does not execute any instructions.
The processor remains in lockup state until either:
It is reset
Preemption by a higher priority exception occurs
It is halted by a debugger
If lockup state occurs from a Secure HardFault when AIRCR.BFHFNMINS is set to 1 or the NMI handler, a subsequent NMI does not cause the processor to leave lockup state