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avrdude -c dasa -p m48 -P /dev/ttyUSB0 -U lfuse:w:0xE0:m
To use an external clock chip, the fuses will be set differently depending on speed, but generally, they will be CKSEL3..1 is 011 (for fast crystal), CKSEL0 is 1 (for conservative crystal), and SUT is 11, giving fuse settings of (the below is untested – it is from extrapolated from the sometimes buggy spec sheet):
avrdude -c dasa -p m48 -P /dev/ttyUSB0 -U lfuse:w:0xF7:m
NOTE: Be very careful programming the fuse bits. If you program the fuse bits incorrectly, your Mini will turn into a brick.
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