ATMega168P Fuse/Lock Bits
=========================
This configuration is from usbasploader's Makefile.

    HFUSE   0xD6
    LFUSE   0xDF
    EFUSE   0x00
    LOCK    0x3F(intact)

#---------------------------------------------------------------------
# ATMega168P
#---------------------------------------------------------------------
# Fuse extended byte:
# 0x00 = 0 0 0 0   0 0 0 0 <-- BOOTRST (boot reset vector at 0x1800)
#                    \+/
#                     +------- BOOTSZ (00 = 2k bytes)
# Fuse high byte:
# 0xd6 = 1 1 0 1   0 1 1 0
#        ^ ^ ^ ^   ^ \-+-/
#        | | | |   |   +------ BODLEVEL 0..2 (110 = 1.8 V)
#        | | | |   + --------- EESAVE (preserve EEPROM over chip erase)
#        | | | +-------------- WDTON (if 0: watchdog always on)
#        | | +---------------- SPIEN (allow serial programming)
#        | +------------------ DWEN (debug wire enable)
#        +-------------------- RSTDISBL (reset pin is enabled)
# Fuse low byte:
# 0xdf = 1 1 0 1   1 1 1 1
#        ^ ^ \ /   \--+--/
#        | |  |       +------- CKSEL 3..0 (external >8M crystal)
#        | |  +--------------- SUT 1..0 (crystal osc, BOD enabled)
#        | +------------------ CKOUT (if 0: Clock output enabled)
#        +-------------------- CKDIV8 (if 0: divide by 8)


# Lock Bits
# 0x3f = - - 1 1   1 1 1 1
#            \ /   \-/ \-/
#             |     |   +----- LB 2..1 (No memory lock features enabled)
#             |     +--------- BLB0 2..1 (No restrictions for SPM or LPM accessing the Application section)
#             +--------------- BLB1 2..1 (No restrictions for SPM or LPM accessing the Boot Loader section)