Where is AUDIO_MCLK_CLK_ROOT in i.MX7D used?

[george]

Dear all,

Where is AUDIO_MCLK_CLK_ROOT described in the reference manual really used?

If someone knows it, please let me know.

I want to know whether MCLK for SAI will be affected.

BR,

George

[igorpadykov]

Hi George

you are right, mclk is affected as described on

https://community.nxp.com/message/922214?commentID=922214#comment-922214 

Best regards
igor
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[george]

Dear Igor,

Please let me know only a few.

Finally, isn't AUDIO_MCLK_CLK_ROOT used anywhere?

Best Regards,

George

[igorpadykov]

Hi George

please read carefully suggested link, it summarizes:

"in conclusion audio_mclk_root_clk clock is taken all the time by SAI1.."

So it is used for mclk generation.

Best regards
igor

[hvparys]

Hi Igor,

This issue is still not 100% clear to me, also not from the referenced old post.

If AUDIO_MCLK_CLK_ROOT is used by SAI1, then is SAI1_CLK_ROOT never used ? Or are both clock roots needed ?

If both are needed, from which root clock is the bit clock derived ?

Best regards,

Hans