Re: [avr-chat] Interrupts from assync timer in sleepmode

[Bjarne Laursen]

Nils Springob wrote:

> > Yes, that is how I did it first. When the sleepmode is idle, it works 
> > fine.
> > But when sleepmode is power-save, and the output-compare-match 
> > happens in the interrupt-disabled part just before sleep. 
>
>
> Perhaps this is the problem:
> Timer 0 will not work in power-save mode, the datasheet 
> states(ATmega128 p. 43, 44):
> "... contents of the registers in the asynchronous timer should be 
> considered undefined after wake-up in Power-save mode if AS0 is 0."

AS0 is 1, that is what make it an ansyncrone timer. The timer runs from 
the 32768 Hz crystal as it should.

-Bjarne Laursen, RoseTechnology A/S