ATxmega128A1U 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.

FUSEBYTE0 fuse

0xFFdefault 0xFF

JTAGUIDJTAG User ID

FUSEBYTE1 fuse

0x00default 0x00

WDWPERWatchdog Window Timeout PeriodWDPERWatchdog Timeout Period

FUSEBYTE2 fuse

0xFFdefault 0xFF

BOOTRSTBoot Loader Section Reset VectorTOSCSELTimer Oscillator pin locationBODPDBOD Operation in Power-Down Mode

FUSEBYTE4 fuse

0xFEdefault 0xFE

RSTDISBLExternal Reset DisableSTARTUPTIMEStart-up TimeWDLOCKWatchdog Timer LockJTAGENJTAG Interface Enable

FUSEBYTE5 fuse

0xFFdefault 0xFF

BODACTBOD Operation in Active ModeEESAVEPreserve EEPROM Through Chip EraseBODLEVELBrownout Detection Voltage Level

Lock bits

0xFFdefault 0xFF

BLBBBoot Lock Bits - Boot SectionBLBABoot Lock Bits - Application SectionBLBATBoot Lock Bits - Application TableLBLock Bits