Atmel SAM4S Xplained Pro Starter Kit Atmel ATSAM4S-XSTK ATSAM4S-XSTK Data Sheet
Product codes
ATSAM4S-XSTK
979
SAM4S [DATASHEET]
11100E–ATARM–24-Jul-13
40.7.8 ACC Write Protect Mode Register
Name:
ACC_WPMR
Address:
0x400400E4
Access:
Read-write
• WPEN: Write Protect Enable
0 = Disables the Write Protect if WPKEY corresponds to 0x414343 (“ACC” in ASCII).
1 = Enables the Write Protect if WPKEY corresponds to 0x414343 (“ACC” in ASCII).
Protects the registers:
•
•
• WPKEY: Write Protect KEY
This security code is needed to set/reset the WPROT bit value (see
for details).
Must be filled with “ACC” ASCII code.
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