Express-SL/SLE
65
7.3.5 USB
Feature
Options
Description
USB Configuration
Submenu
USB Module Version Info
only
USB Devices
Info only
X Drive, X Keyboards, X Mouse, X 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.
USB Mass Storage Driver Support
Enabled
Disabled
Enable/Disable USB Mass Storage Driver Support.
Port 60/64 Emulation
Enabled
Disabled
Enables I/O port 60h/64h emulation support. This should be enabled
for the complete USB keyboard legacy support for non-USB aware
OSes.
USB hardware delays and time-outs:
Info only
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 max stroge device.
7.3.5.1
USB > USB Configuration
Feature
Options
Description
USB Precondition
Disabled
Enabled
Precondition work on USB host controller and root ports for
faster enumeration.
XHCI Disable Compliance Mode
FALSE
TRUE
Options to disable Compliance Mode. Default is FALSE to not
disable Compliance Mode. Set TRUE to disable Compliance
Mode.
XDCI Support
Disabled
Enabled
Enable/Disable XDCI (USB OTG Device)
USB Port Disable Override
Disabled
Select Per-Pin
Selectively Enable/Disable the corresponding USB port from
reporting a Device Connection to the controller.
