Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK Data Sheet
Product codes
AT91SAM9N12-EK
307
SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]
11063K–ATARM–05-Nov-13
26.10.6 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)
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
Value
Name
Description
0x4D4154
PASSWD
Writing any other value in this field aborts the write operation of the WPEN bit.
Always reads as 0.