BIOS Setup for UPC-7210
UPC-7210 Series User Manual
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4
4.4.11
USB Configuration
BIOS Setting
Description
Legacy USB
Support
•
Enabled
enables Legacy USB support.
•
Auto
disables legacy support if there is
no USB device connected.
•
Disabled
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.
Port 60/64
Emulation
Enables / Disables the support for I/O port
60h / 64h emulation. This should be
enabled for the complete USB keyboard
legacy support for non-USB aware OSes.
USB Transfer time-
out
The time-out value (1 / 5 10 / 20 secs) for
Control, Bulk, and Interrupt transfers.
Device reset time-
out
Gives seconds (10 / 20 / 30 / 40 secs) to
delay execution of Start Unit command to
USB mass storage device.
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.