31.4.8 Register Access Protection

Registers with write access can be optionally write-protected by the Peripheral Access Controller (PAC), except for the following:

  • Interrupt Flag (INTFLAG) register
  • Channel Pending Interrupt (INTPEND)
  • Channel n Interrupt Flag Status and Clear (CHINTFLAGn)
Note: Optional write protection is indicated by the PAC Write Protection property in the register description.

When the CPU is halted in Debug mode, all write protection is automatically disabled. Write protection does not apply for accesses through an external debugger.