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Welcome to the PORTS Forum. Please post your questions, answers, and comments relating to USB and other hardware interfaces in the appropriate forums below. - Jan
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Author Topic: USB Host not seeing connect status from device( Possible reasons ?)  (Read 533 times)
Vinesh
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Posts: 7


« on: May 01, 2012, 04:32:57 pm »


I am debugging a Host controller that talks to a ulpi phy , which is connected to a pendrive. Phy drives clock to the USB controller and I am able to see SOFs toggle. This is ofcourse recorded in FRAME INDEX count.

However my "connect" status is showing 0 mean not connected. Although I made sure that I have enabled power to ports and did usb reset for > 100ms from host perspective. All that I can do is snoop ulpi signals. I also ensured that I am taking phy out of reset.

Any ideas reasons that connect status doesnt update in Host controller registers ?

Even the Line status in Host controller register shows "11" mean not connected .
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