Utilities
37
LEC-BTS
Table 4-23: Advanced Menu > USB
Feature
Options
Description
USB
Info only
USB Module Version
Info only
USB Devices
Info only
Drives, keyboards, mouse, hubs
Legacy USB Support
•
Enabled
• Disabled
• Auto
• 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 and setup.
XHCI Hand-off
•
Enabled
• Disabled
This is a workaround for OSes without XHCI
hand-off support. The XHCI ownership change
should be claimed by the XHCI OS driver.
EHCI Hand-off
• Enabled
• Disabled
This is a workaround for OSes without EHCI
hand-off support. The EHCI ownership change
should be claimed by the EHCI OS driver.
USB Mass Storage Driver Support
•
Enabled
• Disabled
Enable/Disable USB mass storage driver
support.
USB transfer time-out
• 1 sec
• 5 sec
• 10 sec
• 20 sec
The time-out value for control, bulk, and interrupt
transfers
Device reset time-out
• 10 sec
•
20 sec
• 30 sec
• 40 sec
USB mass storage device Start Unit command
time-out.
Device power-up delay
•
Auto
• Manual
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.
Mass Storage Devices
Info only
List current USB mass storage devices.
