I think that's the point. It may work under ideal situations. But there
is no guarantee at any time. I think there has been debates on this in
the past. If you wanted to give yourself a bit more stability than a
crystal, but want to save a bit of money, why not use a ceramic
resonator? If you really want to test it out, put the circuit in a
freezer and see if it still works. Then heat it up with a hair dryer.
I'd be interested to see what happens.

Josh
--
A common mistake that people make when trying to design something
completely foolproof is to underestimate the ingenuity of complete
fools.
        -Douglas Adams

Kyrre Aalerud wrote:
> I am writing a system that will use 2 software RS232 connections at 9600.
> (I don't use the internal usart because I already had perfectly adjusted
> code that could handle both ports in the same routine, so I save space...)
>
> I was using a 4.0000 spec'ed crystal with buildt in capacitors while
> developing...
> Now, I wish to save a few bucks and drop the oscillator and use the internal
> one, but I am concerned about the stability.  It states one place in the
> docs that it varies from 3.65 to 4.28 but I don't know if that is a horror
> scenario or if it actually could happen.

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