To USB or Not to USB


Synopsys USB 3.0 Host Certification Demo with USB Gold Tree

Most people don’t have a clue what goes on with USB 3.0 Certification (or USB 2.0 Certification).

So here’s a video of our USB 3.0 xHCI Host interoperating with a whole bunch of USB products.    These products are arranged into a USB Gold Tree as specified by the USB-IF.


USB 3.0 xHCI Host Certification Test–USB 3.0 Interoperability with USB Gold Tree


We use the MCCI USB 3.0 xHCI Host Stack running on Windows 7.

To my knowledge, this is the only time anyone’s ever been crazy enough to post a video demonstration of the USB Gold Tree.

You can see you need to work with USB 3.0, USB 2.0, and USB 1.1 Devices.

The USB 3.0 Gold Tree uses

  • USB 3.0 Hub and USB 3.0 Flash Drive for Super Speed Bulk In and Out Transfers
  • Four USB 2.0 Hubs
  • Two USB 2.0 Web Cams for Hi-Speed USB 2.0 Isochronous Transfers and Interrupt Transfers
  • USB 2.0/1.1 USB Headset with Microphone for USB 2.0/1.1 Isochronous Transfers
  • Two USB 2.0 Flash Drives for Hi-Speed USB 2.0 Bulk In and Out Transfers
  • Keyboards and Mice for Low Speed USB 1.1 Interrupt Transfers
  • And not visible underneath is a USB 2.0 Printer for more Bulk Out Transfers and Interrupt Transfers.

In this way, it’s possible to test for all the different types of USB traffic.


The USB 3.0 xHCI Host is implemented on our HAPS FPGA-Based Prototyping Platform with our Synopsys USB 3.0 PHY.




For all the details on USB Compliance (and this is really for your USB engineers) go to



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