Meanwhile, ST publishes full schematics and CAD files for all of their development boards, e.g. https://www.st.com/en/evaluation-tools/stm32h747i-disco.html#ca

Meanwhile, ST publishes full schematics and CAD files for all of their development boards, e.g. https://www.st.com/en/evaluation-tools/stm32h747i-disco.html#cad-resources https://www.st.com/en/evaluation-tools/stm32h747i-disco.html... They aren't freely licensed, to be fair, but at least they're published! And, in practice, ST won't mind if you refer to their reference boards while designing your own hardware; that's what they're for, after all.