Datasheet

683
SAM4S Series [DATASHEET]
11100F–ATARM–29-Jan-14
33.8.10 SPI Write Protection Mode Register
Name: SPI_WPMR
Address: 0x400080E4
Access: Read/Write
Reset: See Table 33-5.
 WPEN: Write Protection Enable
0: Disables the Write Protection if WPKEY corresponds to 0x535049 (“SPI” in ASCII).
1: Enables the Write Protection if WPKEY corresponds to 0x535049 (“SPI” in ASCII)
See Section 33.7.5 ”Register Write Protection” for the list of registers that can be write-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
0x535049 PASSWD
Writing any other value in this field aborts the write operation of the WPEN bit.
Always reads as 0.