27.5.8 Register Access Protection

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

Control B register (CTRLB)
Interrupt Flag Status and Clear register (INTFLAG)
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.

Write-protection does not apply to accesses through an external debugger.

The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.