SAM3X8E Atmel Corporation, SAM3X8E Datasheet - Page 368

• Manufacturer Part Number: SAM3X8E
• Manufacturer: Atmel Corporation

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Write Protection Registers
SAM3X/A
SAM3X/A
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
ter”
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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•
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“DMAC Global Configuration Register” on page 370
“DMAC Enable Register” on page 371
“DMAC Channel x [x = 0..5] Source Address Register” on page 382
“DMAC Channel x [x = 0..5] Destination Address Register” on page 383
“DMAC Channel x [x = 0..5] Descriptor Address Register” on page 384
“DMAC Channel x [x = 0..5] Control A Register” on page 385
“DMAC Channel x [x = 0..5] Control B Register” on page 387
“DMAC Channel x [x = 0..5] Configuration Register” on page 389
(DMAC_WPMR).
“DMAC Write Protect Mode Regis-
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12