AVR-Chat

> I have a very weird problem with my Mega16 (DIP40) running a 16MHz
> crystal (22pF loading caps).

Try adding (if possible) a 10R resistor in series with the pin and a 18pF
capacitor to grund as close to the pin as possible.

>22pf is a little low for most HC49 crystals, more common is 27 or 33pf
>(30pf is the ideal)

I've always used 15pF without problems on all boards.

Best regards
Lasse Madsen