# NVMREG Write to DFM

DFM is programmed using the following steps:
1. 1.Set the NVMREGS bit.
A single byte (0xFF) is written into the DFM location. The DFM circuitry automatically erases the memory location before performing the write operation. If the DFM address is write-protected, the WR bit will be cleared and the write operation will not take place.