Power supply scheme for STM32H750

[Slina]

I'm working on PCB with two MCUs, and I'm not sure how to connect power supply lines. Even after reading the datasheet and RM0433, I still find it confusing. Like, which one of the VDD33USB or VDD50USB should I connect and why? Do I connect both? Or do I need to connect VDDLDO? Or VBAT, if I don't plan to use battery and what to do with that pin in that case? Or do I need to connect any of USB VDDs if I'm not using USB or I can keep it floating? Or can I connect the same power supply on all 3.3V power lines? Or can I keep floating analog power input, and use on-chip one?

Is there a nice document to explain it all in details? I was working with SILab MCUs before and the document simply had all scenarios, saving me the trouble of experimenting.

[TDK]

This is a better document which describes the required hardware layout:

https://www.st.com/resource/en/application_note/dm00337873-getting-started-with-stm32h74xig-and-stm32h75xig-hardware-development-stmicroelectronics.pdf

That answers most if not all of your questions. If you have questions after reading that, feel free to ask.

[Slina]

Awesome! It even has crystal connection schematics. I never would have found that document by myself.

Thanks a bunch.

[Piranha]

For oscillators there is also AN2867.