Usb Configuration - Avalue Technology SEMX-H81 User Manual

SEMX-H81 User's Manual

3.6.2.2.1 USB Configuration

Item
Legacy USB Support
XHCI Hand-off
EHCI Hand-off
USB Mass Storage Driver
Support
USB transfer time-out
Device reset time-out
Device power-up delay
Options
Enabled[Default]
Disabled
Auto
Disabled
Enabled[Default]
Disabled[Default]
Enabled
Disabled
Enabled[Default]
1 sec
5 sec
10 sec
20 sec[Default]
10 sec
20 sec[Default]
30 sec
40 sec
Auto[Default]
Manual
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 XHCI
hand-off support. The XHCI ownership change
should be claimed by CHCI driver.
This is a workaround for OSes without EHCI
hand-off support. The EHCI ownership change
should be claimed by EHCI driver.
Enable/Disable USB Mass Storage Driver Support.
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.
SEMX-H81 User's Manual 31