Atmel Evaluation Kit AT91SAM9X25-EK AT91SAM9X25-EK Data Sheet
Product codes
AT91SAM9X25-EK
471
SAM9X25 [DATASHEET]
11054E–ATARM–10-Mar-2014
30.7.11 DDRSDRC Write Protect Mode Register
Name:
DDRSDRC_WPMR
Address:
0xFFFFE8E4
Access:
Read-write
Reset
See
• WPEN: Write Protect Enable
0 = Disables the Write Protect if WPKEY corresponds to 0x444452 (“DDR” in ASCII).
1 = Enables the Write Protect if WPKEY corresponds to 0x444452 (“DDR” in ASCII).
Protects the registers:
•
•
•
•
•
•
•
•
• WPKEY: Write Protect KEY
Should be written at value 0x444452 (“DDR” 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