21.3.3 Locking and Unlocking a Register

A register can be locked or unlocked by setting the appropriate lock bit value in the lock bit configuration .txt file.

1. Browse to locate the lock bit configuration .txt file.
2. Do one or both of the following:
   • Set the lock bit value to 0 for the registers you want to lock.
   • Set the lock bit value to 1 for the registers you want to unlock.
3. Save the file, and import the file into the project (Design Flow window > Configure Register Lock Bits), see Figure 21-9.
4. Regenerate the bitstream.