Regarding i.MX8M SAI pins and Boot Pins Multiplexing

[sandhyaim]

We are designing an infotainment system using i.MX8M processor.@

In this design, we need 2 SAI audio ports (SAI0 & SAI1).

The SAIx pins of i.MX8M are also used as Boot GPIOs.

We need to clarify whether we can use the SAIx pins as both boot pins as well as SAI audio pins?

In Pinmux tool, we are getting a conflict while assigning the same.

Please find attached a snapshot from our design.

Appreciating your immediate support....@

Regards,

Sandhya

[igorpadykov]

Hi Sandhya

for conflictions signals one can use bus isolation curcuit as described in

sect.2.3 Bus isolation circuit i.MX6 System Development User’s Guide

https://www.nxp.com/docs/en/user-guide/IMX6DQ6SDLHDG.pdf

Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------