Advanced - Usb Configuration - Kontron KTQ67/Flex User Manual

KTD-N0829-D

9.5.8 Advanced - USB Configuration

Aptio Setup Utility – Copyright © 2011 American Megatrends, Inc.
Advanced
USB Configuration
USB Devices:
2 Hubs
Legacy USB Support
EHCI Hand-off
USB Hardware delays and time-outs:
USB transfer time-out
Device reset time-out
Device power-up delay
Version 2.11.1210. Copyright © 2011 American Megatrends, Inc
Function
Legacy USB Support
EHCI Hand-off
USB transfer time-out
Device reset time-out
Device power-up delay
Page 84
[Enabled]
[Disabled]
[20 sec]
[20 sec]
[Auto]
Selection
Enabled
Disabled
Auto
Disabled
Enabled
1 sec
5 sec
10 sec
20 sec
10 sec
20 sec
30 sec
40 sec
Auto
Manual
BIOS - Advanced
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
F3: Optimized Defaults
F4: Save & Exit
ESC: Exit
Description
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.
This is a workaround for OSes without EHCI
hand-off support. The EHCI ownership
change should be claimed by EHCI driver.
The time-out value for Control, Bulk, and
Interrupt transfers.
USB mass storage device Start Unit
command time-out.
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.
KTQ67 Users Guide