Atmel SAM4L Xplained Pro Starter Kit Atmel ATSAM4L-XSTK ATSAM4L-XSTK Data Sheet
Product codes
ATSAM4L-XSTK
648
42023E–SAM–07/2013
ATSAM4L8/L4/L2
24.7.19
Write Protect Mode Register
Register Name:
WPMR
Access Type:
Read-write
Offset:
0xE4
Reset Value:
• WPKEY: Write Protect KEY
Has to be written to 0x555341 (“USA” in ASCII) in order to successfully write WPEN. This bit always reads as zero. Writing the
correct key to this field clears WPSR.WPVSRC and WPSR.WPVS.
• WPEN: Write Protect Enable
0: Write protection disabled.
1: Write protection enabled.
Protects the registers:
•
•
•
•
•
•
•
31
30
29
28
27
26
25
24
WPKEY[23:16]
23
22
21
20
19
18
17
16
WPKEY[15:8]
15
14
13
12
11
10
9
8
WPKEY[7:0]
7
6
5
4
3
2
1
0
-
-
-
-
-
-
-
WPEN