To prevent any single software error from corrupting AFEC behavior, certain registers in the address space can be write-protected by setting the WPEN bit in the AFEC Write Protection Mode Register (AFEC_WPMR).
If a write access to a write-protected register is detected, the WPVS flag in the AFEC Write Protection Status Register (AFEC_WPSR) is set and the field WPVSRC indicates the register in which the write access has been attempted.
The WPVS flag is automatically cleared by reading the AFEC_WPSR.
The protected registers are: