AVR-Chat

----Original Message----
From: AVR-Chat@yahoogroups.com
[mailto:AVR-Chat@yahoogroups.com] On Behalf Of Clark Martin
Sent: 30 January 2011 22:49 To: AVR-Chat@yahoogroups.com
Subject: Re: [AVR-Chat] ATMEGA64L, ATMEGA64

> On Jan 30, 2011, at 2:25 PM, Tim Mitchell wrote:
> > 
> > If this is a one-off device and you have a chip that
> > runs at 16Mhz, you'll be fine. I would not do it for
> > production though as sooner or later you will get some
> > that don't work.   
> > 
> I'd avoid doing it at all if possible.  It might work
> today, it might work tomorrow but it might not the next
> day.  Temperature is one variable that might affect it's
> working, if it gets too hot or too cold it might stop
> working.  Also it might work, or at least seem to but you
> might be getting errors that throw off the circuit's
> operation without causing it to fail altogether.      
> 

You may be right, but this was not my experience, and I hammered the devices in all sorts of conditions (not knowing about the 8Mhz limitation until I came across a couple that didn't work properly) - if they worked at all at 16Mhz then they were pretty solid. The 8MHz-only ones either would not start up, or locked up after running for a couple of seconds.



-- 
Tim Mitchell