Hi,
We are developing a custom board based on STM32H743IIT6 microcontroller. The application is USB mass storage acting as Host
We are using USB OTG_FS connection for the microcontroller. We are connecting the VDD33USB to 3.3V.
And here is the USB connector side circuit.
We are using STMCube IDE and configured the USB as below
The configuration File is attached as USB_File_Create. The problem we are getting 3.3V on VDD33USB but we are not getting that voltage on USB connector J12. As per the data sheet internal USB regulator powers the USB.
Is any thing wrong in the circuit and any thing is required to get voltage on connector side. More over, we tried to probe using CRO but unable to see any signals on DP+ and DP- lines. As per the datasheet pull up resistor is embedded. Does DP+ and DP- lines provide outputs without getting voltage on VCC pin on USB connector
And is there any purpose of using VBUS for the configuration.
Regards,
Swaroop
