ATtiny12 fuses & lock bits
The fuse bytes set the clock, start-up, brown-out and boot options; the lock bits protect flash and EEPROM. A fuse bit is programmed at 0 . Change a setting and the byte below updates; the starting values are the factory defaults.
BODLEVEL Brown-out Detection Level Brown-out detection at VCC=2.7 V Brown-out detection at VCC=1.8 V BODEN Brown-out detection enabled 1 · unprogrammed 0 · programmed SPIEN Serial program downloading (SPI) enabled 1 · unprogrammed 0 · programmed RSTDISBL External reset function of PB5 disabled 1 · unprogrammed 0 · programmed CKSEL Clock Select External Clock External Clock Internal RC Oscillator Internal RC Oscillator Internal RC Oscillator External RC Oscillator External RC Oscillator External RC Oscillator External Low-Frequency Crystal External Low-Frequency Crystal External Crystal / Ceramic Resonator External Crystal / Ceramic Resonator External Crystal / Ceramic Resonator External Crystal / Ceramic Resonator External Crystal / Ceramic Resonator External Crystal / Ceramic Resonator Lock bits 0xFF default 0xFF LB Memory Lock Further programming and verification disabled Further programming disabled No memory lock features enabled