AnsweredAssumed Answered

i.MX7 SAI connection when i.MX7 is I2S slave.

Question asked by Satoshi Shimoda on Sep 20, 2016
Latest reply on Sep 22, 2016 by Artur Petukhov

Hi community,

 

I have a question about i.MX7 SAI.
I want to confirm i.MX7 SAI connection.
I understand I2S master generate a bit clock and a frame sync and provide them to I2S slave.
When i.MX7 is I2S master, I think it should be the attached image.

 

Then, when i.MX7 is I2S slave, how connect SAI interface with a external codec?
Which of the following image is correct?

 

I believe the both connections are no problem for i.MX6 since i.MX6 has AUDMUX, but i.MX7 does not have AUDMUX.
And I think i.MX7 SABRE uses the left one also since BSP supports "CODEC as I2S Slave" as per Table 28-2 of Linux Reference Manual (Rev.0, 08.2016 for L4.1.15_1.2.0-ga), but I don't understand how RXC and RXFS are used if my understanding is correct.

 


Best Regards,
Satoshi Shimoda

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