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DS1307 Problem

 
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Porn
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DS1307 Problem
PostPosted: Sun Sep 18, 2005 6:39 am     Reply with quote
http://www.ccsinfo.com/forum/viewtopic.php?t=23255&highlight=ds1307

from Code of DS1307 I have problem ...
1. I used 18F452 with DS1307
2. I have R 10K Pull Up at SLK,SDA with +5V
3. I have coin Battery 3.0 V
4. Crystal is OK.

when I connect coin battery to pin 3 DS1307.Result is 25/45/-91 45:85:85
when I remove coin battery from pin 3 DS1307.Result is 4/19/02 12:11:03

Why?
please help me...
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Sun Sep 18, 2005 1:29 pm     Reply with quote
Read this thread for more things to check:
http://www.ccsinfo.com/forum/viewtopic.php?t=19926&start=0

Also, check your battery with a voltmeter. Is it really 3.0v or
is it only 1.5v ?
Porn
Guest
PostPosted: Sun Sep 18, 2005 7:14 pm     Reply with quote
Thank you for answer.

from... PCM Programmer
Also, check your battery with a voltmeter. Is it really 3.0v or
is it only 1.5v ?

coin battery voltage = 3.0 V (in circuit and out circuit)

I think Hardware is OK.becuase I try with another circiut the same result.
but I think Software is OK.

what wrong?
can tell me why?
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Sun Sep 18, 2005 9:00 pm     Reply with quote
Check all the connections, and all the component values, and the program.
Also try a different DS1307 chip.
Park
Guest
PostPosted: Mon Sep 19, 2005 11:46 am     Reply with quote
check out this example
may be help your solution.
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