Re: [Gumstix-users] Maximum number of I2C devices

[briany <bye...@de...>]

there is a device which addresses this very issue - the 82B715 
http://www.datasheetcatalog.com/datasheets_pdf/8/2/B/7/82B715.shtml
http://www.datasheetcatalog.com/datasheets_pdf/8/2/B/7/82B715.shtml 

I understand that can get you a factor of ten reduction in the effective bus
capacitance allowing much longer lines. All you do, as I understand it, is
have one of these devices at each end of the line, with pullups on one end
but not the other.

Brian



ericwade wrote:
> 
> Thanks, Dave, I kinda figured as much. I decided to post this in parallel
> with giving it a try :-)
> 
> My devices will actually be pretty far - I am working on a wearable
> system, with sensor units placed on the user's arms, and the
> robostix/wifistix hanging from the user's belt. Thus, the bus length will
> be on the order of 1 - 2 meters.
> 
> Revised question:
> Has anyone worked with a repeater or an amplifier for the I2C bus that
> they can recommend? 
> 

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