0 7 lfuse PLLCK 1 Use PLL for internal clock 1 6 lfuse CKOPT 1 Oscillator options 2 5 lfuse SUT1 1 Select start-up time 3 4 lfuse SUT0 1 Select start-up time 4 3 lfuse CKSEL3 1 Select Clock Source 5 2 lfuse CKSEL2 0 Select Clock Source 6 1 lfuse CKSEL1 0 Select Clock Source 7 0 lfuse CKSEL0 1 Select Clock Source 8 4 hfuse RSTDISBL 1 Select if PB/ is I/O pin or RESET pin 9 3 hfuse SPIEN 0 Enable Serial Program and Data Downloading 10 2 hfuse EESAVE 1 EEPROM memory is preserved through the Chip Erase 11 1 hfuse BODLEVEL 1 Brown out detector trigger level 12 0 hfuse BODEN 1 Brown out detector enable