Atmel Evaluation Kit AT91SAM9G25-EK AT91SAM9G25-EK Hoja De Datos
Los códigos de productos
AT91SAM9G25-EK
301
SAM9G25 [DATASHEET]
11032C–ATARM–25-Jan-13
25.7.7 Write Protect Mode Register
Name:
MATRIX_WPMR
Address:
0xFFFFDFE4
Access:
Read-write
For more details on MATRIX_WPMR, refer to
.
• WPEN: Write Protect ENable
0 = Disables the Write Protect if WPKEY corresponds to 0x4D4154 (“MAT” in ASCII).
1 = Enables the Write Protect if WPKEY corresponds to 0x4D4154 (“MAT” in ASCII).
Protects the entire MATRIX address space from address offset 0x000 to 0x1FC.
• WPKEY: Write Protect KEY
(Write-only)
Should be written at value 0x4D4154 (“MAT” in ASCII). Writing any other value in this field aborts the write operation of the WPEN
bit. Always reads as 0.
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