Other Parts Discussed in Thread: TDA4VM
Hi ,
We have designed custom TDA4VM board where we are unable to detect the USB in DFU mode. whenever we connect the USB tot host computer it says '' Unknow usb is recognised and device descriptor is failed''. any body has any thoughts on the same why we are seeing the issue.
we could debug the board and done some observations.
USB0_VBUS = 1.6V at SOC pad
USB_DP line is pulled high to VDA_USB_3V3
USB_DN line is not pulling line high however seen some transactions on the line
USB_ID pin is floating
also we are using TYPE-C connector and schematics is same as Reference design.
also we have only 19.2 MHz crystal on OSC0 lines and no other high frequency crystals are used in the design.
Regards,
Chaitanya