Atmel Evaluation Kit AT91SAM9G25-EK AT91SAM9G25-EK Data Sheet
Product codes
AT91SAM9G25-EK
700
SAM9G25 [DATASHEET]
11032D–ATARM–10-Mar-2014
35.8.10 SPI Write Protection Mode Register
Name:
SPI_WPMR
Address:
0xF00000E4 (0), 0xF00040E4 (1)
Access:
Read-write
• WPEN: Write Protection Enable
0: The Write Protection is Disabled
1: The Write Protection is Enabled
• WPKEY: Write Protection Key Password
If a value is written in WPEN, the value is taken into account only if WPKEY is written with “SPI” (SPI written in ASCII Code, ie
0x535049 in hexadecimal).
0x535049 in hexadecimal).
List of the write-protected registers:
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