Sorry, I forgot the [PIC] tag on this.  The master is an 16F876 and it the
only master.  The distances are just board level.  If there is not a problem
leaving the pullup on SCL then I will leave it.  I am guessing there is a
problem with the code.  There's not a lot of examples of hardware I2C to
EEPROM..  I also saw something in the archives about adding capacitance to
the lines.  Anything on this?  Thanks.

Glenn Mitchell.
----- Original Message -----
From: "Herbert Graf" <mailinglist@FARCITE.NET>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Tuesday, March 13, 2001 8:57 PM
Subject: Re: I2C pullups


> > Hello.  I am looking at the datasheets for 24LC32 and 24LC256
> > EEPROMS.  The
> > datasheets state the SDA line needs to be pulled up.  No mention
> > of using a
> > pullup on SCL.  Then in Serial PIC'n it says pullups are required on
both
> > lines.  Which is correct?  Thanks for any help.
>
>      It depends on you're masters. If you only have one master and that
> master can only be used in a one master environment (ie. a PIC which never
> selects it's SCL as an input) then it is possible that you will never need
a
> pullup on SCL. However, to be safe I recommend putting one on the line
> anyways. The value depends on what kind of devices and distances are
> involved. TTYL

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