A newer version of this document is available. Customers should click here to go to the newest version.
USB Controllers Overview
Extensible Host Controller Interface (xHCI) is the interface specification that defines Host Controller for Universal Serial Bus (USB), which is capable of interfacing with USB 1.x, 2.x, and 3.x compatible devices.
In case that a device (example, USB mouse) was connected to the computer, the computer will work as Host and the xHCI will be activated inside the PCH.
Extensible Device Controller Interface (xDCI) is the interface specification that defines Device Controller for Universal Serial Bus (USB), which is capable of interfacing with USB 1.x, 2.x, and 3.x compatible devices
In case that the computer is connected as a device (example, tablet connected to desktop) to other computer then the xDCI controller will be activated inside the device will talk to the Host at the other computer.
| Protocol Name | Data Rate |
|---|---|
| USB 2.0 Low - Speed | 1.5 Mbps |
| USB 2.0 Full - Speed | 12 Mbps |
| USB 2.0 High - Speed | 480 Mbps |
| USB 3.2 Gen 1x1 | 5 Gbps |
| USB 3.2 Gen2x1 | 10 Gbps (xHCI only) |