Chapter 7 – DFI DT122-HR Manual User Manual
Page 43
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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.