Re: [Gumstix-users] SDA SCL and pullups

[Kim H. <ki...@ki...>]

> Am Dienstag, 24. August 2004 20:22 schrieb Kim Hendrikse:
> > What are the pull up requirements on SDA and SCL? I assume they are
> > necessary?
> >
> 
> Hi,
> 
> we connected two 10kohms resistors to the I2C-lines and got the bus 
> working. I think the value of the resistors can be changed, depending on 
> the number of connected slave-devices and the length of the bus. But 
> always take care of the about the maximal current for the PXA io-pins.
> 
> Sven

I have two devices on my board. An a/d convertor and some I/O ports. I used a
1.5k resistor as that was a value I saw on a data sheet somewhere. Good point
about the max current though, thanks for the tip!

  - Kim