Datasheet

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:
• “ACC Mode Register” on page 972
• “ACC Analog Control Register” on page 978
• WPKEY: Write Protect KEY
This security code is needed to set/reset the WPROT bit value (see Section 40.6.3 ”Write Protection System” 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
76543210
–––––––WPEN