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DM365 : question about DP line(of USB) during SRP

Hi,

I have a question about SRP in DM365 USB.

In our case, the USB of DM365 is always on the HOST mode(that is, USB_ID = GND).

BTW, DP keeps HIGH sometimes when an USB device(=wifi module) is powered. According to SRP protocol, A-device should pull DP low, is it right?

Then what can we suspect on DM365 side?

Thanks & Regards,

Devin