In order to save a command's value to non-volatile flash, you will need to send the STORE_DEFAULT_ALL command or STORE_USER_ALL command after writing the desired command data, for example VOUT_COMMAND. The STORE commands will cause the MAX15301 to save the value to flash memory. You will then need to set a flag bit in the STAP_DISABLE command to indicate that the saved value in NV Flash should be used on power-up over the pin-strap setting.