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Hi;

in some posts there was some problems using ponyprog in serial
programming of fuse bits. but consider some notes:

1- for all fuse bits '1' means UNPROGRAMMED and '0' means PROGRAMMED.
so pay attention to the values you want to program for fuse bits.

2- in any cases which you may lost your chip due to setting the fuse
bits to external clock mode, you can use either an external clock
source or use the programmer "AvReal" from

http://www.ln.com.ua/~real/avreal/index_e.html

by using this programmer you can connect the LED pin to XTAL1 pin of
micro with -o0 "lower case letter O followed by a zero" option.
which in this case the programmer will generate XTAL1 frequency
itself. and you have no need to use an external clock source for your
IC.

but in some rare cases you may need using high voltage programming
mode, specially in some kinds of avr micros like ATmega162.

good luck;



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