Datasheet

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:See Table 41-3
• 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
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
76543210
–––––––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.