Datasheet

SAM4S Series [DATASHEET]
Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14
926
38.14.17HSMCI Write Protection Mode Register
Name: HS MCI_WPMR
Address: 0x400000E4
Access: Read /Write
• WPEN: Write Protect Enable
0: Disables the Write Protection if WPKEY corresponds to 0x4D4349 (“MCI” in ASCII).
1: Enables the Write Protection if WPKEY corresponds to 0x4D4349 (“MCI” in ASCII).
See Section 38.13 “Register Write Protection” for the list of registers which can be protected.
• WPKEY: Write Protect 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
0x4D4349 PASSWD
Writing any other value in this field aborts the write operation of the WPEN bit.
Always reads as 0.