31 Mar '17, 5pm

An Introduction to Differential I²C https://t.co/QQl5xFnkYU

One last hiccup: the start and finish of the actual cable that carries the DI²C signal needs to be populated with termination resistors . These resistors are specced to match the characteristic differential impedance of the cable itself. (Find this value in your cable datasheet.) Before you all go home and try building systems without them, hear me out: these resistors are necessary . Without them, the signals that run down the wire will reflect back up and down repeatedly until they dissipate. Of course, we certainly can’t have bogus copies of old data interfering with new data. Simply adding the proper value termination resistors eliminates this problem.

Full article: http://hackaday.com/2017/03/31/an-introduction-to-differe...

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