Datasheet

101
SAM9X35 [DATASHEET]
11055E–ATARM–10-Mar-2014
13.10.20 AIC Write Protect Mode Register
Name: AIC_WPMR
Address: 0xFFFFF1E4
Access: Read-write
Reset: See Table 13-3
• WPEN: Write Protect Enable
0 = Disables the Write Protect if WPKEY corresponds to 0x414943 ("AIC" in ASCII).
1 = Enables the Write Protect if WPKEY corresponds to 0x414943 ("AIC" in ASCII).
Protects the registers:
• “AIC Source Mode Register” on page 83
• “AIC Source Vector Register” on page 84
• “AIC Spurious Interrupt Vector Register” on page 96
• “AIC Debug Control Register” on page 97
• WPKEY: Write Protect KEY
Should be written at value 0x414943 ("AIC" in ASCII). Writing any other value in this field aborts the write operation of the WPEN
bit. Always reads as 0.
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