Datasheet

391
SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
19.5.9 System Controller Write Protection Mode Register
Name: SYSC_WPMR
Access: Read/Write
Reset:See Table 19-1 ”System Controller Registers”
 WPEN: Write Protection Enable
0: Disables the write protection if WPKEY corresponds to 0x525443 (“RTC” in ASCII).
1: Enables the write protection if WPKEY corresponds to 0x525443 (“RTC” in ASCII).
See Section 19.4.8 “Register Write Protection” 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
0x525443 PASSWD
Writing any other value in this field aborts the write operation of the WPEN bit.
Always reads as 0.