Atmel Evaluation Kit AT91SAM9G25-EK AT91SAM9G25-EK Data Sheet
Product codes
AT91SAM9G25-EK
482
SAM9G25 [DATASHEET]
11032C–ATARM–25-Jan-13
31.6
Write Protection Registers
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
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.
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.
key, WPKEY.
The protected registers are:
z
z
z
z
z
z
z
z
z
z