3.2.2.9 USB Configuration
◼ Legacy USB Support
Enables Legacy USB support. The AUTO option disables legacy support if
no USB devices are connected. The DISABLE option will keep USB devices
available only for EFI applications.
◼ XHCI Hand-off
This is a workaround of 0 Secs without XHCI hand-off support. The XHCI
ownership change should be claimed by XHCI driver.
◼ USB Mass Storage Driver Support
Enable/Disable USB Mass Storage Driver Support.
◼ USB S5 Wakeup Support
This item allows users to enable/disable USB S5 wakeup support.
◼ USB Transfer Time-Out
This item allows users to set the time-out value for control, bulk, and Inter-
rupt USB mass storage device transfers.
◼ Device Reset Time-Out
This item allows users to set the device reset command time-out.
◼ Device Power-Up Delay
This item allows users to Set the maximum time the device will take 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 delay time is ob-
tained from the Hub descriptor.
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