I'm working on a project with the STM32H503CBU7 which requires USB. I have a 32MHz external crystal on my board that appears to be stable. The chip works and can be programmed and such. I also troubleshot out other physical issues like cold joints and shorts because that has burned me before when the USB device fails to enumerate.
My intent was to use the PLL2Q source with the USB peripheral so I could also specify a 200MHz sys clock for everything else via PLL1. When I use the PLL2Q source however, I get no interrupts from the `USB_DRD_FS_IRQHandler` handler and so my USB stack does not operate.
To make things more confusing, it also does not work even when both PLL's have the same values set for all parameters, as shown in the image below.
It is important to note that this works with the PLL1Q source, as it is shown in the image, and I'm currently compromising a little on the sys clock speed. It will work for my purposes, but I'm more interested to know whether there's some "magic bullet" setting I'm missing, or if this could be a known configuration limitation.
The generated code in my `main.c` file that configures the peripheral clocks seemed to be okay, so I don't think it is a code auto-gen issue, but I could also be wrong about that.
I have already tried this on two chips because I thought there could be something wrong with the first, but they both exhibit this behavior.
