The Fuse Write command writes the fuses. It can only be used by the UPDI, the
CPU cannot start this command.
Follow this procedure to use this command:
- Write the address of the fuse to the
Address register (NVMCTRL.ADDR)
- Write the data to be written to the
fuse to the Data register (NVMCTRL.DATA)
- Execute the Fuse Write command.
- After the fuse is written, a Reset is
required for the updated value to take effect.
For reading fuses, use a regular read on the memory location.