Datasheet

652
32117D–AVR-01/12
AT32UC3C
25.7.19 Write Protect Mode Register
Register Name: WPMR
Access Type: Read-write
Offset: 0xE4
Reset Value: See Table 25-16
•
WPKEY: Write Protect KEY
Should be written at value 0x555341 ("USA" in ASCII). Writing any other value in this field aborts the write operation of the
WPEN bit. Always reads as 0.
• WPEN: Write Protect Enable
0 = Disables the Write Protect if WPKEY corresponds to 0x555341 ("USA" in ASCII).
1 = Enables the Write Protect if WPKEY corresponds to 0x555341 ("USA" in ASCII).
Protects the registers:
• ”Mode Register” on page 628
• ”Baud Rate Generator Register” on page 640
• ”Receiver Time-out Register” on page 641
• ”Transmitter Timeguard Register” on page 642
• ”FI DI RATIO Register” on page 643
• ”IrDA FILTER Register” on page 645
• ”Manchester Configuration Register” on page 646
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