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TWI stands for Two Wire Interface and for most marts this bus is identical to I²C. The name TWI was introduced by Atmel and other companies to avoid conflicts with trademark issues related to I²C. A description of the capabilities of TWI interfaces can be found in the data sheets of corresponding devices. Expect TWI devices to be compatible to I²C devices except for some particularities like general broadcast or 10 bit addressing.

For the time being there is also no TWI high speed mode.

If you have an I²C analyser it will work with a TWI set-up as well without modifications.

 
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