0 7 lfuse CLKDIV8 0 Divide clock by 8 1 6 lfuse CKOUT 1 Oscillator options 2 5 lfuse SUT1 0 Select start-up time 3 4 lfuse SUT0 0 Select start-up time 4 3 lfuse CKSEL3 0 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 7 hfuse OCDEN 1 Enable OCD 9 6 hfuse JTAGEN 0 Enable JTAG 10 5 hfuse SPIEN 0 Enable Serial programming and Data Downloading 11 4 hfuse WDTON 1 Watchdog timer always on 12 3 hfuse EESAVE 1 EEPROM memory is preserved through chip erase 13 2 hfuse BOOTSZ1 0 Select Boot Size 14 1 hfuse BOOTSZ0 0 Select Boot Size 15 0 hfuse BOOTRST 1 Select Reset Vector 16 2 efuse BODLEVEL1 1 Brown-out Detector trigger level 17 1 efuse BODLEVEL0 1 Brown-out Detector trigger level 18 0 efuse RSTDISBL 1 External Reset Disable