Habey PRO-6820 - Manual (Page 50)

4.2.7 USB Configuration
Legacy USB Support
Enable Legacy USB support. Set this option [Enabled] or [Auto] if you
want system to support USB devices, such as U disk, USB keyboard,
etc. in DOS. Otherwise, select this option as [Disabled]. [Auto] option
disables legacy support if no USB devices are connected.
EHCI1/2 Controller
Enable or disable USB2.0 controller.
USB3.0 Support
Enable or disable USB3.0 controller.
XHCI Hand-off
Enabling this option is mandatory. System default: [Enabled].
EHCI Hand-off
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