User
’s Manual
EMX-A55E User
‟s Manual
49
3.2.2.4 USB Configuration
Item
Options
Description
Legacy USB Support
Enabled
Disabled
Auto
Enables Legacy USB support. AUTO option
disables legacy support if no USB device is
connected. DISABLED option will keep USB
devices available only for EFI applications.
EHCI Hand-off
Disabled
Enabled
This is a workaround for OSes without EHCI
hand-off support. The EHCI ownership
change should be claimed by EHCI driver.
USB transfer time-out
1sec
5sec
10sec
20sec
The time-out value for Control, Bulk, and
Interrupt transfers.
Device reset time-out
10sec
20sec
30sec
40sec
USB mass storage device Start Unit
command time-out
Device power-up delay
Auto
Manual
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
100ms, for a Hub port the delay is taken from
Hub.
Data Modul AG - www.data-modul.com
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