Here we will document the settings of the fuses in the AVR microcontroller that we recommend. If a fuse is not mentioned here, leave it in the default state.
Fuse High Byte
| name | bit | description | value |
| OCDEN | 7 | enable OCD | 1(default) |
| JTAGEN | 6 | enable JTAG | 0(default) |
| SPIEN | 5 | enable SPI programming | 0(default) |
| WDTON | 4 | watchdog timer always on | 1(default) |
| EESAVE | 3 | preserve EEPROM contents during chip erase | 0 |
| BOOTRST | 0 | reset vector | 1(default) |
Fuse Low Byte
| name | bit | description | value |
| CKDIV8 | 7 | divide clock by 8 | 1(default) |
| SUT1 | 5 | start-up time | 0 |
| SUT0 | 4 | start-up time | 0(default) |
| CKSEL3 | 3 | clock source | 1 |
| CKSEL2 | 2 | clock source | 1 |
| CKSEL1 | 1 | clock source | 0 |
| CKSEL0 | 0 | clock source | 0(default) |
