44 UMT-7211
User
Manual
4.4.9 USB
Configuration
BIOS Setting
Description
Legacy USB Support
Enables / Disables Legacy USB support.
Auto
disables legacy support if there is no
USB device connected.
Disable
keeps USB devices available only
for EFI applications.
XHCI Hand-pff
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 USB mass storage driver
support.
Port 60/64 Emulation
Enables I/O port 60h / 64h emulation support.
This is should be enabled for the complete
USB keyboard legacy support for non-USB
aware OSes.
USB Transfer time-out
Sets the time-out value 1, 5, 10 or 20 sec(s) for
Control, Bulk, and Interrupt transfers.
Device reset time-out
Sets the seconds (10, 20, 30, 40 secs) of
delaying 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, and for a hub port the delay is taken
from hub descriptor.
