AVR-Chat

> Do any of the AVRs have a programmable voltage reference?  I've gone
> through some of the datasheets and it doesn't look like they do.
> 
> Mike

Not that I recall but, if you have an unused timer, you can put it into
PWM mode and connect its output to the AREF pin via a suitable R-C
filter. 

BTW, the built-in "Precision" ref is anything but... I'm running one
prototype board with a M128 who's 2.56V ref measures 2.783V! 

Bruce