SWCU193 April 2023 CC2340R2 , CC2340R5 , CC2340R5-Q1
The processor enters a lockup state if a fault occurs when executing the NMI or HardFault handlers, or if the system generates a bus error when unstacking the PSR on an exception return using the MSP. When the processor is in lockup state it does not execute any instructions. The processor remains in lockup state until one of the following occurs
If the lockup state occurs in the NMI handler, a subsequent NMI does not cause the processor to leave lockup state.