Question about HSE and LSE
Hello guys. I'm trying to design a custom pcb that uses an STM32h7a3zit mcu and one of the most confusing parts is clock configuration. I will mainly use the hs usb interface. I've searched a couple of online sources and from what i could find is that i should configure the clock as follows :
The LSE is set to Crystal/ Ceramic Resonator and the corresponding Mux is set to LSI meaning that it will use an internal clock.
The HSE is set to Bypass clock source meaning that it should use an external oscillator. I currently use a nucleo board and the manual states that there is no such component on board (X2). Does it use the X1 component that goes through the STLINK(U14) instead? Can i just connect the X1 unit straight to the mcu, given that i don't need an onboard STLINK on my custom board ? In addition the clock should be set to HSE but it is set to HSI instead.