28.5.8 Register Access Protection

All registers with write access can be write protected optionally by the PAC, except for the following registers:

Interrupt Flag Status and Clear register (INTFLAG)
Non-Maskable Interrupt Flag Status and Clear register (NMIFLAG)

Optional write protection by the PAC is denoted by the PAC Write-Protection property in each individual register description.

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

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