topic Re: MCLK clarifications with SAI in i.MX Processors

MCLK clarifications with SAI

imx_user8 — Thu, 01 Feb 2024 14:42:52 GMT

It isn't clear to me and I want to make sure I'm understanding the documentation correctly.

1. If we use the imx8m mini SAI as a slave then it is not necessary to use the imx8 MCLK, correct?

The documentation talks about using MCLK to generate the bit clock when master, but doesn't necessarily mention being used as a slave.

2. If we use the imx8m mini SAI5 as a master, it appears I can connect an external OSC to SAI2 MCLK and use that for SAI5. Can I then output that same MCLK on the SAI5 MCLK pin?

Re: MCLK clarifications with SAI

JorgeCas — Sat, 03 Feb 2024 03:52:00 GMT

Hello, I hope you are doing well.

1. Yes, that is correct.

2. Could you please share me a diagram of desired connection? Maybe you could use SAI5 as master to provide clock signals to SAI2 working as slave.

Best regards.

Re: MCLK clarifications with SAI

imx_user8 — Mon, 05 Feb 2024 15:24:48 GMT

Thank you. I believe you've answered my questions as I can do the first option.

Re: MCLK clarifications with SAI

zouhui — Mon, 06 May 2024 13:53:04 GMT

@imx_user8

I am also suffering the clock configuration similar with your No.2 question, would you please share how to configure? Thanks

My application is that, SAI2 MCLK came from external IC, we want to reuse SAI2 MCLK for PDM clock.