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DS1307 RTC time incorrect

 
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Anish



Joined: 08 Apr 2009
Posts: 3

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DS1307 RTC time incorrect
PostPosted: Sun Apr 04, 2010 11:52 pm     Reply with quote
Hi all,
I am having problem with my RTC DS1307. I have two identical modules, each of them has PIC 18f452, LCD and DS1307 in it. The LCD displays the time read from the RTC.

I set correct time in both of the modules, and displaying identical time. But after 1 week one devices RTC time is lags around 20 seconds. I would like to know anyone got the same problem earlier..? and how to solve it..?

Regards
Anish
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With Thanks !!!!!!!!! ANISH
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Mon Apr 05, 2010 12:30 am     Reply with quote
Read these threads:
http://www.ccsinfo.com/forum/viewtopic.php?t=41015
http://www.ccsinfo.com/forum/viewtopic.php?t=39129
Anish



Joined: 08 Apr 2009
Posts: 3

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DS1307 RTC time incorrect
PostPosted: Mon Apr 05, 2010 12:51 am     Reply with quote
PCM programmer wrote:
Read these threads:
http://www.ccsinfo.com/forum/viewtopic.php?t=41015
http://www.ccsinfo.com/forum/viewtopic.php?t=39129


Thanks for the reply,

I don't know my xtal capacitance and tolerance.
I will check by replacing the crystal...

Regards
Anish
_________________
With Thanks !!!!!!!!! ANISH
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