Atmel Evaluation Kit AT91SAM9X25-EK AT91SAM9X25-EK Hoja De Datos
Los códigos de productos
AT91SAM9X25-EK
321
SAM9X25 [DATASHEET]
11054E–ATARM–10-Mar-2014
25.7.7 Write Protection Mode Register
Name:
MATRIX_WPMR
Address:
0xFFFFDFE4
Access:
Read/Write
• WPEN: Write Protection Enable
0: Disables the write protection if WPKEY corresponds to 0x4D4154 (“MAT” in ASCII).
1: Enables the write protection if WPKEY corresponds to 0x4D4154 (“MAT” in ASCII).
for the list of registers that can be write-protected.
• WPKEY: Write Protection Key
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.
0.