Hello! I am working with a STM32U073 on 1.8V and I want to use the USB feature. Indeed, the datasheet tells us that USB needs a separate power supply around 3V (4.1 Power supplies), but every time when I apply this voltage on VDDUSB pin, it goes to the VDD pins too. And vice versa, if I supply only the VDD pins with 1.8V, same voltage is on VDDUSB, without traces between them. I set / cleared according to datasheet the PVM1, PVMO1 and USV bits (4.2.3 Peripheral Voltage Monitoring (PVM)). It can be something internal? I checked the PCB and traces and is nothing wrong.
