25.5.8 Register Access Protection

All registers with write-access are optionally write-protected by the peripheral access controller (PAC), except the following registers:

• Interrupt Flag Status and Clear (INTFLAG) register
• General Purpose (GPx) registers

Write-protection is denoted by the "PAC Write-Protection" property in the register description.

Write-protection does not apply to accesses through an external debugger. Refer to the PAC - Peripheral Access Controller for details.