User`s manual

MANO831 Mini ITX Board
48 AMI BIOS Setup Utility
 USB Configuration
You can use this screen to select options for the USB Configuration, and change the value
of the selected option. A description of the selected item appears on the right side of the
screen.
USB Devices
Display all detected USB devices.
Legacy USB Support
Use this item to enable or disable support for USB device on legacy operating system. The
default setting is Enabled. Auto option disables legacy support if no USB devices are
connected. Disable option will keep USB devices available only for EFI applications.
EHCI Hand-off
This is a workaround for OSes without EHCI hand-off support. The EHCI ownership
change should be claimed by EHCI driver.
USB transfer time-out
The time-out value for control, bulk and interrupt transfers.
Device reset time-out
USB mass storage device start unit command time-out.
Device power-up delay
Maximum time the device will take before it properly reports itself to the host controller.
Auto option uses default value: for a root port it is 100ms, for a hub port the delay is taken
from hub descriptor.