IBASE Technology ET980 Series, User Manual

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48 ET980 Series User’s Manual
4.4.10 USB Configuration
BIOS Setting Description
Legacy USB Support
• Enabled enables Legacy USB support.
•
Auto disables legacy support if there is no
USB device connected.
•
Disabled keeps USB devices available only
for EFI applications.
XHCI Hand-off
This is a workaround for OSes without XHCI
hand-off support. The XHCI ownership change
should be claimed by XHCI driver.
USB Mass Storage
Driver Support
Enables / Disables the support for USB mass
storage driver.
USB Transfer
time-out
The time-out value (1 / 5 10 / 20 secs) for Control,
Bulk, and Interrupt transfers.
Device reset time-out
Gives seconds (10 / 20 / 30 / 40 secs) to delay
execution of Start Unit command to USB mass
storage device.
Device power-up
delay
Maximum time the device will take before it
properly reports itself to the Host Controller.
“Auto” uses default value: for a root port it is 100
ms, for a hub port, the delay is taken from hub
descriptor.