Hi Pier
>Is there any basic documentation with sample usage?
unfortunately not sorry since this part is "PREPRODUCTION" as described on below
and not fully supported.

Full support will be available after public release, additional
documents will appear on official product web page
i.MX 8X Applications Processors| Arm® Cortex®-A35, Cortex-M4; | NXP
Best regards
igor
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