28.4.8 Register Access Protection

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

Channel Pending Interrupt (INTPEND)
Channel n Interrupt Flag Status and Clear (CHINTFLAGn)

Note: Optional write protection is indicated by the "PAC Write Protection" property in the register description.

Write protection does not apply for accesses through an external debugger.

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