Advantech ARK-1220 User Manual page 49

3.2.2.11 USB Configuration
 Legacy USB Support
This item allows users to enable or disable legacy USB support. The Auto
option disables legacy support if no USB devices are connected. The Disabled
option keeps USB devices available only for EFI applications.
 XHCI Hand-Off
This item is a workaround for operating systems without XHCI hand-off support.
The XHCI ownership change should be claimed by an XHCI driver.
 EHCI Hand-Off
This item is a workaround for operating systems without EHCI hand-off support.
The EHCI ownership change should be claimed by EHCI driver.
 USB Mass Storage Driver Support
This item allows users to enable or disable USB driver support.
 Device Reset Timeout
This item allows users to configure the USB start unit command timeout.
Device Power-Up Delay

This item allows users to configure the maximum time the device will wait before
reporting itself to the host controller. The Auto option uses the default value,
which is 100 ms for a root port. For a hub port, the default delay time is deter-
mined by the hub descriptor.
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