User Manual

Page 58
9.3.5 USB
Feature Options Description
USB Info only
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.
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.
Chipset USB Configuration Submenu
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 storage device.
9.3.5.1 USB > Chipset USB Configuration
Feature Options Description
USB Configuration Info only
XHCI Mode Enabled
Disabled
Auto
Smart Auto
Mode of operation of xHCI controller.
USB 2.0(EHCI) Support Disabled
Enabled
Control the USB EHCI (USB 2.0) functions. One EHCI
controller must always be enabled.