User`s manual

- 49 -
BIOS
Aptio Setup Utility - Copyright (C) 2011 American Megatrends, Inc.
Version 2.14.1219. Copyright (c) 2011 American Megatrendes, Inc.
USB Configuration
USB Devices:
1 Keyboard, 1 Mouse
Legacy USB Support
EHCI Hand-off
USB Hardware delays and time-outs:
USB transfer time-out
Device reset time-out
Device power-up delay
Enables Legacy USB
support. AUTO option
disables legacy
support if no USB
devices are connected.
DISABLE option will
keep USB devices
available only for EFI
applications.
→←: Select Screen
↓↑: Select Item
Enter: Select
+/-: Change Opt.
F1: General Help
F2: Previous Values
F9: Optimized Defaults
F10: Save and Exit
ESC: Exit
Advanced
[Enabled]
[Disabled]
[20 sec]
[20 sec]
[Auto]
5.2.5 USB Conguration
Setting Description
Legacy USB Support
Enables (default) Legacy USB support. AUTO op-
tion disables legacy support if no USB devices are
connected. DISABLE option will keep USB devic-
es 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.
► Options: Enabled and Disabled (default).
USB hardware delays and time-outs:
USB transfer time-out
The time-out value for Control, Bulk and Interrupt
transfers.
► Options: 1/5/10/20 sec (default)