NEWZED@AOL.COM wrote:
>
> We have a battery powered application running at 5VDC and 20mHz.  In order to
> get longer battery life we are considering going to a 3.3 volt regulator,
> which requires changing the resonator to 4 mHz.  This is a data logging operation
> where data is logged at intervals ranging from 1 minute to 60 minutes.
>
> Question:  Is the change to 4mHz going to noticeably degrade the performance
> of the unit?

That would depend on what the unit is doing for the other 59.9999999 seconds.
I would suggest running it a 32kHz to get MUCH better battery life.
Frankly, 20Mhz is absurd if you are only logging a data point every minute
(unless you have some reason to be sampling at a MHZ rate).

If you have some reason for high compute speed, you might want to
consider going to sleep for most of your sample interval.


Robert

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