12.4.4 Register Access Protection
All registers with write access can be write-protected optionally by the Peripheral Access Controller (PAC), except for the following PAC registers:
- Write Control (WRCTRL) register
- AHB Client Bus Interrupt Flag Status and Clear (INTFLAGAHB) register
- Peripheral Interrupt Flag Status and Clear n (INTFLAG A/B/C...) registers
Optional write protection by the Peripheral Access Controller (PAC) is denoted by the "PAC Write Protection" property in each individual register description.
Note: PAC write protection does not apply to accesses through an external debugger.