> If you are creating a slave device (i.e. software I2C) then I have no
> idea what you are supposed to do.
they don't say anything about it being illegal to use addresses without thier approval and i'd imagine they'd say so if it was. If your device can be programed to any address then it can be made interoperable with anything with a configuration and most stuff piclisters are building probablly can be.

If on the other hand you are getting custom silicon made and only support a limited range of addresses (probablly because your addresses setting is made through stapping pins up and down and you can only spare a limited number of pins) then it would certainly make sense to look for an official assignment.



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