Atmel Xplained Pro Evaluation Kit ATSAM4E-XPRO ATSAM4E-XPRO Data Sheet
Product codes
ATSAM4E-XPRO
SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
484
26.7
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.
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.
access key, WPKEY.
The protected registers are: