Jetson Xavier NX Carrier Board MCU firmeware

Hi, Is the source to the MCU firmware on the Xavier NX carrier available somewhere?

I’m seeing from P3509_A01_OrCAD_schematic.pdf the MCU U18 model is EFM8S810F2G QFN20. There is also a state diagram about how the MCU should work. I’m wondering if we use this exact part in a custom design, whether we’ll need to implement the same logic or we can just load the available firmware.

Thanks.

The firmware is in DLC:
https://developer.nvidia.com/embedded/nvidia-jetson-agx-xavier-and-jetson-xavier-nx-power-button-supervisor-firmware

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Thanks for the download link. Will give it a try. I saw on another question the customer could not program it.