Lpc2000

Usually, this is because the tank capacitors are too big.  Look at the spec
sheet for the crystal and see what they recommend.  Or try a different spec
crystal. 


The average should be close to dead on once you get the loading right.  But,
you will see some variation from unit to unit, depending upon the accuracy
of components.

 

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From: lpc2000@yahoogroups.com [mailto:lpc2000@yahoogroups.com] On Behalf Of
Sean
Sent: Thursday, February 09, 2006 4:28 PM
To: lpc2000@yahoogroups.com
Subject: [lpc2000] RTC Losing ~5 seconds per day

 

Hi All,

I've got an LPC2148 set up and the RTC is losing about 5 seconds per day, I 
am assuming that my 32.768kHz crystal isn't exact.

Are there any good ways to correct this?  I know this isn't major, but 
that's 2 minutes a month, a little outside of what I'd like to see.

Thanks,

-- Sean




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