15.7.1 BFM Write Protection

Pages in the BFM regions can be protected individually using bits in the NVMLBWP register. At Reset, all pages are in a write-protected state and must be disabled prior to performing any programming operations on the BFM regions. There is also an unlock bit, ULOCK(NVMLBWP[31]), that is set at Reset and can be cleared by the user software. When cleared, changes to write protection for that region can no longer be made. When cleared, the ULOCK bit can only be set by a Reset.

The user can only change the NVMLBWP write-protect register by following the unlock sequence. See NVMKEY Register Unlocking Sequence from Related Links.