Datasheet

536
SAM4S Series [DATASHEET]
11100F–ATARM–29-Jan-14
29.17.21PMC Write Protection Mode Register
Name: PMC_WPMR
Address: 0x400E04E4
Access: Read/Write
Reset: See Table 29-3
• WPEN: Write Protection Enable
0: Disables the write protection if WPKEY corresponds to 0x504D43 (“PMC” in ASCII).
1: Enables the write protection if WPKEY corresponds to 0x504D43 (“PMC” in ASCII).
See Section 29.16 ”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
0x504D43 PASSWD
Writing any other value in this field aborts the write operation of the WPEN
bit. Always reads as 0
.