This command allows to save the current configuration, i.e. the registers
02FF, into the factory configuration area. Any subsequent invocation of the LOAD_FACTORY_CONFIG instruction will restore all the registers to the same state.
Never (permanently disabled after manufacturing).
This instruction is permanently disabled when the device exits the factory (by setting bit 1 “Lock factory config” in the Fuses). Once this is done, calling this instruction returns an error.