STM32H750IBT6 USB NOT DETECT IN CUSTOM BOARD

[naveen]

Hi

we created custom PCB using stm32h750IBT6 MCU. in this we have added USB interface using DM & DP pins.

issue: USB interrupt in not happening when i connect USB to the connector. i have added SCHEM for reference.

considered steps in MX:

1. enabled USB_FS as HOST_ONLY,

2. given clock as 48hz from RC48,

3.  enable USB_HOST as mass storage class.

I am not understanding where I went wrong.

 

NOTE:

1.all pins are matched as per schematic.

2. in schematic i can sense 5v at out pin in ic4 as well
3. also i have removed D1 ic as well even though result



 

[FBL · Accepted solution]

Hi @naveen 

Why Vbus sensing pin is connected to PA7? It should be configured either to PC13 or PA9 as per datasheet.