User`s guide

Copyright © 2012 congatec AG TCEDm10 84/94
9.4.12 USB Submenu
Feature Options Description
USB Devices no option Displays the detected USB devices.
Legacy USB Support Enabled
Disabled
Auto
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 and setup.
EHCI Hand-off Disabled
Enabled
This is a workaround for OSes without EHCI hand-off support. The EHCI ownership change should be claimed by
the EHCI OS driver.
Device Reset Timeout 10 sec
20 sec
30 sec
40 sec
USB legacy mass storage device Start Unit command timeout.
USB Transfer Timeout 1 sec
5 sec
10 sec
20 sec
The timeout value for control, bulk, and interrupt transfers.
Device Power-Up Delay
Selection
Auto
Manual
Dene maximum time a USB device might need before it properly reports itself to the host controller.
Auto selects
a default value which is 100ms for a root port or derived from the hub descriptor for a hub port.
Device Power-Up Delay Value 0-40
Default : 5
Actual power-up delay value in seconds.
USB Mass Storage Device
Name
(Auto detected USB mass
storage devices are listed here
dynamically)
Auto
Floppy
Forced FDD
Hard Disk
CD-ROM
Every USB mass storage device that is enumerated by the BIOS will have an emulation type setup option. This
option species the type of emulation the BIOS has to provide for the device.
Note: The device’s formatted type and the emulation type provided by the BIOS must match for the device to boot
properly.
Select AUTO to let the BIOS auto detect the current formatted media.
If Floppy is selected then the device will be emulated as a oppy drive.
Forced FDD allows a hard disk image to be connected as a oppy image. Works only for drives formatted with
FAT12, FAT16 or FAT32.
Hard disk allows the device to be emulated as hard disk.
CDROM assumes the CD-ROM is formatted as bootable media, specied by the ‘El T
orito’ Format Specication.