I2S Audio Overview

  • Three Signals : sck (clock) , sd (data) , ws (Word select)
  • WS : Signal used to select Left or right audio Channel
  • I2S supports only 2 channel.  can be TDM used to support 4,6,8 channel using I2S interface.


  • TDM for Multichannel

  • Same I2S interface for more than 2 channel.
  • Each channel samples will be up to 32 bit time and after that next channel starts.
  • Change of ws signal will determine odd/even channel. Transmitter & receiver has bit counter

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