SAM3X8E Atmel Corporation, SAM3X8E Datasheet - Page 391

• Manufacturer Part Number: SAM3X8E
• Manufacturer: Atmel Corporation

23.7.19
Name:
Address:
Access:
Reset:
• WPEN: Write Protect Enable
0 = Disables the Write Protect if WPKEY corresponds to 0x444D4143 (“DMAC” in ASCII).
1 = Enables the Write Protect if WPKEY corresponds to 0x444D4143 (“DMAC” in ASCII).
Protects the registers:
• WPKEY: Write Protect KEY
Should be written at value 0x50494F (“DMAC” in ASCII). Writing any other value in this field aborts the write operation of
the WPEN bit. Always reads as 0.
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12
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•
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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
31
23
15
—
7
DMAC Write Protect Mode Register
DMAC_WPMR
0x400C41E4
Read-write
See
Table 23-5
30
22
14
—
6
29
21
13
—
5
28
20
12
—
4
WPKEY
WPKEY
WPKEY
27
19
11
—
3
26
18
10
—
2
25
17
—
9
1
SAM3X/A
SAM3X/A
WPEN
24
16
8
0
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