Dfi HD620-H81 User Manual download pdf (Page 51)

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Chapter 3 BIOS Setup

Chapter 3

USB Configuration

This field is used to configure the USB settings.

Precondition work on

USB host controller

and root ports for faster

enumeration.

USB Conﬁ guration

USB Precondition

XHCI Mode

USB Ports Per-Port Disable Control

[Disabled]

[Auto]

[Disabled]

Chipset

USB Precondition

Precondition works on USB host controller and root ports for faster enumeration.

 Select Screen

 Select Item

Enter: Select

Change Opt.

F1: General Help

F2: Previous Values

F3: Optimized Defaults

F4: Save & Reset

ESC: Exit

XHCI Mode

Selects the operation mode of XHCI controller. These options are Auto, Enabled,

and Disabled. When Disabled is selected in the XHCI Mode, it will display the following

information:

EHCI 1 and EHCI 2

These fields are used to control the functions of USB EHCI (USB 2.0) controllers

One EHCI controller must always be enabled.

Mode of operation of

XHCI controller.

USB Conﬁ guration

USB Precondition

XHCI Mode

EHCI1

EHCI2

USB Ports Per-Port Disable Control

[Disabled]

[Enabled]

[Disabled]

Chipset

 Select Screen

 Select Item

Enter: Select

Change Opt.

F1: General Help

F2: Previous Values

F3: Optimized Defaults

F4: Save & Reset

ESC: Exit

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Dfi HD620-H81 User Manual Page 51

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