imx8mq sai

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imx8mq sai

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dhty2015
Contributor II

hello!

I used imx8m sai3 TXD TXC TXFS RXD to connect to the I2S sound card, but the card only supported the I2S main mode.Can TXC and TXFS capture I2S clock as input?

Thank you very much!

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weidong_sun
NXP TechSupport
NXP TechSupport

Hi,

>>Can TXC and TXFS capture I2S clock as input?

Yes, they can.

CPU_TXC & CPU_TXFS can both be configured as input or output.

Hardware connections should be like this:

CPU_TXC---->CODEC_I2S_CLK

CPU_TXFS--->CODEC_I2S_LRCLK

CPU_TXD---->CODEC_I2S_RXD

CPU_RXD---->CODEC_I2S_TXD

If codec is configured as master and cpu side of I2S is slave, CPU_TXC and CPU_TXFS are input.

if codec is configured as slave and cpu side of I2S is master, CPU_TXC and CPU_TXFS are output.

have a  nice day!

BR,

Weidong