Atmel Evaluation Kit AT91SAM9G25-EK AT91SAM9G25-EK Scheda Tecnica
Codici prodotto
AT91SAM9G25-EK
507
SAM9G25 [DATASHEET]
11032C–ATARM–25-Jan-13
31.7.21 DMAC Write Protect Mode Register
Name:
DMAC_WPMR
Address:
0xFFFFEDE4 (0), 0xFFFFEFE4 (1)
Access:
Read-write
Reset:
See
• WPEN: Write Protect Enable
0 = Disables the Write Protect if WPKEY corresponds to 0x444D41 (“DMA” in ASCII).
1 = Enables the Write Protect if WPKEY corresponds to 0x444D41 (“DMA” in ASCII).
Protects the registers:
•
•
•
•
•
•
•
•
•
•
• WPKEY: Write Protect KEY
Should be written at value 0x444D41 (“DMA” in ASCII). Writing any other value in this field aborts the write operation of the
WPEN bit. Always reads as 0.
WPEN bit. Always reads as 0.
31
30
29
28
27
26
25
24
WPKEY
23
22
21
20
19
18
17
16
WPKEY
15
14
13
12
11
10
9
8
WPKEY
7
6
5
4
3
2
1
0
—
—
—
—
—
—
—
WPEN