xHCI Debug Capability Device Compliance (Logo)

This test measures the ability of a test computer to support debug operations using an xHCI controller.

Test details

Associated requirements


See the device hardware requirements.


Windows RT (ARM-based) Windows 8 (x64) Windows 8 (x86) Windows Server 2012 (x64) Windows RT 8.1 Windows 8.1 x64 Windows 8.1 x86 Windows Server 2012 R2

Expected run time

~20 minutes


Certification Functional



Running the test

Before you run the test, complete the test setup as described in the test requirements: USB Bus Controller Testing Prerequisites.

To complete this debug test, you must configure two computers. The computer that you are trying to certify is the System under Test (SUT). The second computer is the Host on which the Windows debugger will run. These computers must meet the Windows HCK prerequisites and must be included in the same computer pool. For more information, see Windows HCK Prerequisites. If the device being tested is an XHCI controller, an XHCI controller must be included in both computers. If the XHCI controller in the SUT has any user-accessible ports, the controller must have debug capability.


For troubleshooting information, see Troubleshooting Bus Controller Testing.

This test returns Pass or Fail. To review test details, review the test log from Windows Hardware Certification Kit (Windows HCK) Studio.

More information


Parameter Description


If 0, an xHCI controller is present but is not physically wired to an external port. If X, An xHCI controller is present and X is the number of user-accessible ports provided by the controller.

Command syntax

In the Parameters window Transport field, enter USB. Provide the following additional parameters.

Transport type Required parameters Comments



Default is default. If there's more than one USB host controller on the SUT computer, you must specify a BusParams value. Enter Busparams as b.d.f where b, d, and f are the bus number, device number, and function number of the USB host controller that you are using for debugging. These numbers are displayed in the USB host controller’s Properties window in Device Manager.


If you are using an EHCI host controller on the SUT computer, the debug cable must be connected to Port 1. You can use the UsbView tool to identify Port 1. USBView is included in the WDK.

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