- echo 0x00 > ${f}_new
- ${AVRDUDE} ${DELAY} -p ${MCU} -P `echo ${AVRDUDE_PORT} | sed 's,",,g'` \
- -c ${AVRDUDE_PROGRAMMER} -U ${f}:r:${f}:i
+ echo 0xff > ${f}_new # default for each bit is 1 (unprogrammed)
+ ${AVRDUDE} ${DELAY} -p ${MCU} -P `echo ${AVRDUDE_PORT} | \
+ sed 's,",,g'` -c ${AVRDUDE_PROGRAMMER} -U ${f}:r:${f}:i