If you need the 4 MHz crystal to be exactly on 4.000 000 MHz, then the value(s)
of  the caps does make a difference.

Thomas Thorsen wrote:

> Hello
>
> I'm just wondering if the capacity of the two capacitors in the crystal
> oscilator is important. i have two 22pF for my 4 Mhz crystal. Some projekts
> use different values. Does that make a difference?
>
> Yours sincerely
> Thomas Thorsen
>
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