C:\Programmer>avrdude -q -C avrdude.conf -p m1280 -c diecimila -P ft0 -e -U lock
:w:0x0F:m
avrdude: BitBang OK
avrdude: pin assign miso 3 sck 5 mosi 6 reset 7
avrdude: drain OK

ft245r: bitclk 230400 -> ft baud 115200
avrdude: AVR device initialized and ready to accept instructions
avrdude: Device signature = 0x1e9703
avrdude: erasing chip
ft245r: bitclk 230400 -> ft baud 115200
avrdude: reading input file "0x0F"
avrdude: writing lock (1 bytes):
avrdude: 1 bytes of lock written
avrdude: verifying lock memory against 0x0F:
avrdude: load data lock data from input file 0x0F:
avrdude: input file 0x0F contains 1 bytes
avrdude: reading on-chip lock data:
avrdude: verifying ...
avrdude: 1 bytes of lock verified

avrdude: safemode: Fuses OK

avrdude done. Thank you.
А там всеравно eFuse F0 при чтении