Quick Reference Guide
ARC-21W33 Quick Reference Guide 69
3.6.2.11 USB Configuration
The USB Configuration menu helps read USB information and configures USB settings.
Item
Options
Description
Legacy USB Support
Enabled
[Default]
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.
XHCI Hand-off
Enabled
[Default]
Disabled
This is a workaround for OSes without XHCI
hand-off support. The XHCI ownership change
should be claimed by XHCI driver.
USB Mass Storage Driver Support
Enabled
[Default]
Disabled
Enable/Disable USB Mass Storage Driver
Support.
USB transfer time-out
1 sec
5 sec
10 sec
20 sec
[Default]
The time-out value for Control, Bulk, and
Interrupt transfers.
Device reset time-out
10 sec
20 sec
[Default]
30 sec
40 sec
USB mass storage device Start Unit command
time-out.
Device power-up delay
Auto
[Default]
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
100ms, for a Hub port the delay is taken form
Hub descriptor.
Mass Storage Devices
Auto
[Default]
Floppy
Forced FDD
Hard Disk
CD-ROM
Mass storage device emulation type.
‘AUTO’
enumerates devices according to their media
format. Optical drives are emulated as
‘CDROM’, drives with no media will be
emulated according to a drive type.
