Glenn wrote:
>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.

Yes, you always need a pullup on the SDA line. (4K7 or 2K2)
If the master (which always drives SCL) tri-states the SCL line
then you do need the pullup on SCL. If you only have one master
in your setup and it actually swings hi-lo then you don't need it.
Regards...

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