AVR-Chat

At 02:04 AM 27/02/2007, you wrote:
>  i used external clock source from 8 MHz crystal. I was 
> check  external clock to the correct pin.

This is still NOT CLEAR. Are you using an external clock source
like a canned oscillator feeding into X1 or are you using the
external CRYSTAL oscillator connected to X1 and X2 with the
appropriate caps?

The 2 are completely different and if you have set the fuses for
EXTERNAL oscillator rather than EXTERNAL CRYSTAL oscillator then
you don't have a clock and will need to use some oscillator
(maybe 1 MHz) fed into X1 in order to get the programmer to work
again and set your fuses correctly.

This is a very common problem as people get confused by the
2 types, especially when you use a parallel port type
programmer instead of a serial type connected to Studio
which makes things a lot easier.

Regards

John Samperi

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Ampertronics Pty. Ltd.
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Email: john@ampertronics.com.au
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