SAM4S_14 Datasheet, PDF (1057/1231 Pages) ATMEL Corporation – ARM-based Flash MCU

41.7.8 ACC Write Protection Mode Register
Name:
Address:
Access:
Reset:
ACC_WPMR
0x400400E4
Read/Write
See Table 41-3
31
30
29
28
27
26
25
WPKEY
23
22
21
20
19
18
17
WPKEY
15
14
13
12
11
10
9
WPKEY
7
6
5
4
3
2
1
–
–
–
–
–
–
–
• WPEN: Write Protection Enable
0: Disables the write protection if WPKEY corresponds to 0x414343 (“ACC” in ASCII).
1: Enables the write protection if WPKEY corresponds to 0x414343 (“ACC” in ASCII).
See “Register Write Protection” on page 1047 for the list of registers that can be write-protected.
• WPKEY: Write Protection Key
Value
0x414343
Name
PASSWD
Description
Writing any other value in this field aborts the write operation of the WPEN bit.
Always reads as 0.
24
16
8
0
WPEN
SAM4S Series [DATASHEET]
Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14
1057