Datasheet

371
32133D–11/2011
UC3D
20.7.12 Write Protect Mode Register
Register Name:
WPMR
Access Type: Read-write
Offset: 0xE4
Reset Value: See Table 20-8
• WPKEY: Write Protect KEY
Has to be written to 0x555341 (“USA” in ASCII) in order to successfully write WPEN. Always reads as zero.
• WPEN: Write Protect Enable
0 = Write protection disabled.
1 = Write protection enabled.
Protects the registers:
• ”Mode Register” on page 358
• ”Baud Rate Generator Register” on page 368
• ”Receiver Time-out Register” on page 369
• ”Transmitter Timeguard Register” on page 370
31 30 29 28 27 26 25 24
WPKEY[23:16]
23 22 21 20 19 18 17 16
WPKEY[15:8]
15 14 13 12 11 10 9 8
WPKEY[7:0]
76543210
———————WPEN