Asrock a790gmh 128m User Manual

5 3

BIOS SETUP UTILITY

USB Configuration

To enable or disable
the onboard USB
controllers.

Select Screen
Select Item

Change Option

General Help

Load Defaults

F10

Save and Exit

ESC

Exit

Advanced

USB Controller

USB 2.0 Support
Legacy USB Support
Async Park Mode

[Enabled]

[Enabled]
[BIOS Setup Only]
[Disabled]

3.4.8

3.4.8 USB Configuration

USB Configuration

USB Controller

Use this item to enable or disable the use of USB controller.

USB 2.0 Support

Use this item to enable or disable the USB 2.0 support.

Legacy USB Support

Use this option to select legacy support for USB devices. There are four
configuration options: [Enabled], [Auto], [Disabled] and [BIOS Setup
Only]. The default value is [BIOS Setup Only]. Please refer to below
descriptions for the details of these four options:
[Enabled] - Enables support for legacy USB.
[Auto] - Enables legacy support if USB devices are connected.
[Disabled] - USB devices are not allowed to use under legacy OS and
BIOS setup when [Disabled] is selected. If you have USB compatibility
issue, it is recommended to select [Disabled] to enter OS.
[BIOS Setup Only] - USB devices are allowed to use only under BIOS
setup and Windows / Linux OS.

Async Park Mode

Use this option to enable or disable Async Park Mode. For normal operation
the APM function should be disabled. If APM is enabled, some USB card
reader devices may not work properly. The USB controller uesd on these
devices may not be able to handle the short delay time between the data
packets.