On Mar 10, 1:21 pm, vasile surducan <[email protected]> wrote:
> datasheet claims minimum calibration range of +/-2.8 seconds/month. It will depend ENTIRELY on: 1) Quality / Accuracy of the 32.768 crystal 2) Having a fine adjustment "trimmer capacitor" on the approriate crystal/CPU Osc pin 3) Ambient temperature and variation of it. With inappropriate fixed capacitors and big temperature swing, I'm sure you can make it as bad as 3 sec a day... With aged quality crystal, trimmed NPO adjustable capacitor and 25 to 35 ambient at crystal (with only a few degrees variation), it's likely that better than 1s a month is possible. Watch on wrist keeps best time next to skin if never taken off and crystal adjustable Cap was trimmed for about 30 deg C and back metal but casing plastic :-) -- You received this message because you are subscribed to the Google Groups "jallib" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/jallib?hl=en.
