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I2S resistors requirement?

Question asked by joe42 on Aug 2, 2016
Latest reply on Aug 16, 2016 by joe42


I understand that low-value I2S resistors are often used to limit rise/fall time of signals, and therefore reduce high frequency emissions.  They're present on most, if not all of the EVB's.

 

Is there a rule of thumb for when these are recommended?  For example, a speed or trace length?   I've heard they should go near the source (whatever is driving the pin), but I'm not sure if that really matters.

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