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Chapter 7 – DFI DT122-HR Manual User Manual

Page 43

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43

Chapter 7 BIOS Setup

Chapter 7

USB Configuration

This section is used to configure USB.

Legacy USB Support

Enabled

Enables legacy USB.
Auto

Disables support for legacy when no USB devices are connected.
Disabled

Keeps USB devices available only for EFI applications.

EHCI Hand-off

This is a workaround for OSes that does not support EHCI hand-off. The EHCI ownership

change should be claimed by the EHCI driver.

USB transfer time-out

The time-out value for Bulk and Interrupt transfers.

Device reset time-out

Selects the USB mass storage device start unit command timeout.

Device power-up delay

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.

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.

Aptio Setup Utility - Copyright (C) 2011 American Megatrends, Inc.

Version 2.14.1219. Copyright (C) 2011 American Megatrends, Inc.

USB Confi guration

USB Devices:
2 Hubs

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 & Exit
ESC: Exit

F71879 Super IO Configuration

This section is used to configure the I/O functions supported by the onboard Super I/O chip.

Restore AC Power Loss
help.

Aptio Setup Utility - Copyright (C) 2011 American Megatrends, Inc.

Version 2.14.1219. Copyright (C) 2011 American Megatrends, Inc.

F71879 Super IO Confi guration

F71879 Super IO Chip

Restore AC Power Loss

Watchdog Timer

Super IO Watchdog Timer

Serial Port 1 Confi guration

Serial Port 2 Confi guration

Advanced

F71879

[Power Off]

[Disabled]

10



Select Screen



Select Item

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

Values

F3: Optimized

Defaults

F4: Save & Exit
ESC: Exit

Restore AC Power Loss

Off

When power returns after an AC power failure, the system’s power is off. You must press

the Power button to power-on the system.
On

When power returns after an AC power failure, the system will automatically power-on.
Last State

When power returns after an AC power failure, the system will return to the state where

you left off before power failure occurs. If the system’s power is off when AC power failure

occurs, it will remain off when power returns. If the system’s power is on when AC power

failure occurs, the system will power-on when power returns.

Watchdog Timer

Enable or disable Super IO Watchdog Timer.