Re: [avr-gcc-list] TWI pullup resisor values

[Bob Paddock]

> improper pullups on SDA and SCL are causing this?
> I'm using 3.3K pullups. Would it be better to
> just use the internal pullups already part
> of the port circuitry? 

Take a look at the Linear Tech. LTC1642.

http://www.linear.com/prod/datasheet.html?datasheet=642

and

http://www.linear.com/prod/datasheet.html?datasheet=472

"The LTC®1694 [-1] is a dual SMBus active pull-up designed to enhance data 
transmission speed and reliability under all specified SMBus loading 
conditions. The LTC1694 [-1] is also compatible with the Philips I²C Bus."


-- 
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       http://www.unusualresearch.com/ http://www.bpaddock.com/

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