![background image](http://html1.mh-extra.com/html/ibase-technology/ib811/ib811_user-manual_3239085069.webp)
60
IB811F 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
The 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
100ms. But for a Hub port, the delay is taken from
Hub descriptor.