Asus TS300-E5 - Manual (Page 108)

5-16 Chapter 5: BIOS setup
The following items appear only when the USB Functions item is set to
[Enabled].
USB 2.0 Controller [Enabled]
Allows you to enable or disable the USB 2.0 controller.
Configuration options: [Enabled] [Disabled]
Legacy USB Support [Auto]
Allows you to enable or disable support for legacy USB. The AUTO option disables
legacy support if there is no USB device connected.
Configuration options: [Disabled] [Enabled] [Auto]
USB2.0 Controller mode [HiSpeed]
Allows you to set the USB2.0 controller mode to HiSpeed (480 Mbps) or FullSpeed
(12 Mbps).
Configuration options: [HiSpeed] [FullSpeed]
BIOS EHCI Hand-Off [Enabled]
Allows yout to enable or disable the BIOS EHCI Hand-Off support function.
Configuration options: [Disabled] [Enabled]