AVR-Chat

> 	On one application I'm using the Tiny2313 with a 16MHz 
crystal and the 
> internal clock prescaler set to divide by four.  It seems more 
stable this 
> way.

Eww.. I've never used that particular chip, but I'd be nervous. 
IF you get the right crystal, and I've seen NO guidance from Atmel on 
selecting it, then you'll be ok. The key is to get the output level 
higher than the unspoken threshold value. 

In our case, with the M128, most systems worked fine, a few had 
really tough to explain problems, wierd serial port glitches, but 
nothing consistent.. Then one day, all of a sudden, bang. Pretty much 
nothing works. Different date code on the M128 parts is about all we 
could point at.  

Once we found out about the CKOPT bit (which got set the opposite of 
what I had spec'd), we flipped the bit back and life was good again.

A bit nasty recalling systems from customers though, since you can't 
touch the fuse bits from the program.