> Or what about license issues.  I know Phillips owns IIC, but 
> is a license required for SPI?

As I have never seen a real definition document for SPI I doubt it. (I
don't consider a chapter in some 68HC datasheet a defintion document). I
doubt anyone realy invented (as opposed to documented) SPI: a lot of
plain 'TTL' chips are SPI compatible.

Wouter van Ooijen

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Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: www.voti.nl/hvu
 

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