MIMXRT685 - is it possible to configure MCLK as input with I2S as a master using the external MLK?

[Alex_SRL]

Hi, I'm trying to configure the MCLK as external but then use I2S interface as a master using that external MCLK.

Originally the MCLK was generated by RT685 and the clock for I2S interface was connected in the following way:

CLOCK_AttachClk(kAUDIO_PLL_to_FLEXCOMM1)

After reconfiguring the MCLK pin as input (port 1 pin 10) I've tried to change the I2S configuration as following:

CLOCK_AttachClk(kMASTER_CLK_to_FLEXCOMM1)

Is there any additional configuration change required, if the only change I need to do is change the MCLK from generated internally to external source?

Thanks!

[Omar_Anguiano]

Hello
I hope you are well.

You can use config tool to configure the direction of the MCLK as well to attach it as source of Flexcomm.

Best regards,
Omar