Chapter 4 – DFI HU968 User Manual

Page 35

www.dfi .com

Chapter 4 BIOS Setup

Chapter 4

USB Configuration

This section is used to configure parameters of the USB device.

Legacy USB Support

Enabled

Enable legacy USB.

Disabled

Keep USB devices available only for EFI applications.

Auto

Disable support for legacy when no USB devices are connected.

EHCI Hand-off

This is a workaround for OSes without the EHCI hand-off support. The change of EHCI

ownership should be claimed by the EHCI driver.

USB transfer time-out

Select the time-out value for Control, Bulk and Interrupt transfers.

Device reset time-out

Select the commanded time-out value for the USB mass storage device to start.

Device power-up delay

Maximum time the device will take before it properly reports itself to the Host Control-

ler. “Auto” is the default value. It is 100 ms for a Root port. For a Hub port, the delay

is taken from the Hub descriptor.

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.

USB Confi guration

USB Devices:
2 Keyboards, 1 Hub

Legacy USB Support

EHCI Hand-off

USB hardware delays and time-outs:

USB transfer time-out
Device reset time-out
Device power-up delay

Advanced

[Enabled]

[Disabled]

[20 sec]
[20 sec]
[Auto]



Select Screen



Select Item

Enter: Select
+/-: Change Opt.
F1: General Help
F2: Previous

Values

F3: Optimized

Defaults

F4: Save & Reset
ESC: Exit

PCH-FW Configuration

This section is used to configure parameters of the Management Engine Technology.

ME FW Version
ME Firmware Mode
ME Firmware Type
ME Firmware SKU