Atmel ARM-Based Evaluation Kit for SAM4S16C, 32-Bit ARM® Cortex® Microcontroller ATSAM4S-WPIR-RD ATSAM4S-WPIR-RD Data Sheet
Product codes
ATSAM4S-WPIR-RD
1057
SAM4S Series [DATASHEET]
Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14
41.7.8 ACC Write Protection Mode Register
Name:
ACC_WPMR
Address:
0x400400E4
Access:
Read/Write
Reset
:
• 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.
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
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
Value
Name
Description
0x414343
PASSWD
Writing any other value in this field aborts the write operation of the WPEN bit.
Always reads as 0.
Always reads as 0.