Lpc2000

----- Original Message ----- 
From: "Sean" <embeddedrelated@...>
To: <lpc2000@yahoogroups.com>
Sent: Friday, February 10, 2006 12:28 AM
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.

I've just bought some 32 kHz xtals. They seem to come in two types, 6 pF and 
12 pF load capacitance, that could be the cause of your problem. Also, when 
used in watches they have a trimmer to set the frequency exactly.

Leon