BIOS Setup
SP-63ER User Manual
51
4
4.4.9
USB Configuration
BIOS Setting
Description
Legacy USB Support
Enable:
Enables Ledacy USB Support.
Auto:
Disables legacy support if no USB devices
are connected.
Disable:
Keeps USB devices available only for
EFI applications.
XHCI Hand-off
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
Enables / Disables the support for USB mass
storage driver.
USB Transfer time-out
The time-out value for Control, Bulk, and Interrupt
transfers.
Device reset time-out
USB mass storage device Start Unit command
time-out. Options: 10/20/30/40 sec
Device power-up delay
The 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. But for a Hub port, the delay is taken from
Hub descriptor.