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IMX8MM: One SAI two i2S

Question asked by Denys Lytvynov on May 6, 2020
Latest reply on May 6, 2020 by igorpadykov

Hello,

 

In the user manual under paragraph 13.9.1.2 there is a block diagram (Figure 13-104) which shows TX and RX signals which can be used for i2S. My question is:

 

 

I am trying to connect two devices - a Microphone and a Speaker. Both are using i2S for communication although one as a transmitter and another as a receiver. Microphone, MPN SPH0645LM4H-B, has WSBCLKDOUT and Speaker has a DAC - TAS2505 which is driven with i2S WSBLCK,  DIN. Would it be possible to drive both if I connect them in the following manner:
Microphone: 
  • WS - SAI2_RXFS
  • BCLK - SAI2_RXC
  • DOUT - SAI2_RXDO
Speaker:
  • WS - SAI2_TXFS
  • BCLK - SAI2_TXC
  • DIN - SAI2_TXD0

 

 

 

Kind Regards,
Den

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