42.5.4 Register Access Protection

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

  • The Interrupt Flag register (INTFLAG)
  • The Filter register (FILTER)
  • The Precaler register (PRESC)
  • The Compare x Value register (CCx)
  • The Channel x Compare Buffer Value register (CCBUFx)
  • The Status register (STATUS)

Optional write protection by the Peripheral Access Controller (PAC) is denoted by the "PAC Write Protection" property in each individual register description.

The PAC write protection does not apply to accesses through an external debugger.