Atmel Evaluation Kit AT91SAM9X25-EK AT91SAM9X25-EK Data Sheet

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SAM9X25 [DATASHEET]

11054E–ATARM–10-Mar-2014

To prevent any single software error that may corrupt the DMAC behavior, the DMAC address space can be write-
protected by setting the WPEN bit in the 

 (DMAC_WPMR).

If a write access to anywhere in the DMAC address space is detected, then the WPVS flag in the DMAC Write Protect 
Status Register (MCI_WPSR) is set, and the WPVSRC field indicates in which register the write access has been 
attempted.

The WPVS flag is reset by writing the DMAC Write Protect Mode Register (DMAC_WPMR) with the appropriate access 
key, WPKEY.

The protected registers are:

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