Serial Digital Audio Formats

When working with serial digital audio interfaces on embedded devices, one comes across several different interface formats, such as I2S and TDM.  These formats are all very similar — they use exactly the same lines for the same purposes, but have subtle differences in the alignment and phases of the signals on those lines.  The best and most concise explanation of the differences between these formats is an application note (AN282) from Cirrus Logic.  I refer to it occasionally when I need to refresh my memory of exactly which format I’m working with.

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