TUSB8020BEVM: TUSB8020BEVM

JORGE CORADO

Replies: 8

Views: 45

Part Number: TUSB8020BEVM

This eval board is detected as "Generic USB 2.1 Hub", even the host port where is connected is USB 3.0. (USB Device Tree Viewer attached).

I connected this device to two different computers running Win 10, and I had the same results.

Any help will be appreciated.

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JMMN
- Jan 14, 2021 4:44 PM
Hi Jorge,

Please resend the attachment, it did not come through. The hub should connect as both a USB 2.1 and USB 3.x hub simultaneously.

Regards,

JMMN
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JORGE CORADO
- Jan 14, 2021 4:51 PM
In reply to JMMN:
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JORGE CORADO
- Jan 14, 2021 4:53 PM
In reply to JORGE CORADO:

UsbTreeView_report_DESKTOP-EIQG8PK.txt
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JMMN
- Jan 14, 2021 4:59 PM
In reply to JORGE CORADO:

Hi Jorge,

The hub connected to Port 21 in the screenshot will be the USB3.x instance of the TUSB8020BEVM.

Regards,

JMMN
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JORGE CORADO
- Jan 14, 2021 5:06 PM
In reply to JMMN:

I can see... I just reset the USB port and Port 21 is not there anymore (see attached)
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JMMN
- Jan 14, 2021 5:35 PM
In reply to JORGE CORADO:

Hi Jorge,

How did you reset the port? If the host leaves its rx terminations and VBUS on during a reset the hub may enter compliance mode, you will need to reset the hub to exit this mode.

Regards,

JMMN
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JORGE CORADO
- Jan 14, 2021 5:43 PM
In reply to JMMN:

I reset the port by unplugged/plugged the USB cable that is coming from the host computer.

At this time I reset my computer a couple of times, and try different HUB reset, and there is no way that I can see that Port 21 anymore.

Additional info: I also have a TUSB8041 eval board, and it is doing the same issue.
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JMMN
- Jan 15, 2021 5:14 PM
In reply to JORGE CORADO:

Hi Jorge,

Can you send me a screen shot of the TUSB8041 connected? And the hub doesn't show up after hitting options -> refresh?

What length cable is being used? Is it Type-C on one side?

Regards,

JMMN
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