Datasheet

151
32133D–11/2011
UC3D
13.6.7 Unlock Register
Name: UNLOCK
Access Type: Write-only
Offset: 0x0018
Reset Value: 0x00000000
To unlock a write protected register, first write to the UNLOCK register with the address of the register to unlock in the ADDR
field and 0xAA in the KEY field. Then, in the next PB access write to the register specified in the ADDR field.
• KEY: Unlock Key
Write this bit field to 0xAA to enable unlock.
• ADDR: Unlock Address
Write the address of the register to unlock to this field.
31 30 29 28 27 26 25 24
KEY
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
------ ADDR[9:8]
76543210
ADDR[7:0]