User guide

ECM-QB User’s Manual
ECM-QB User’s Manual 43
3.6.2.5 USB Configuration
The USB configuration menu is used to read USB configuration information and configure
the USB setting.
Item
Options
Description
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
EHCI Hand-off
Disabled
Enabled
This is a workaround for OSes without
hand-off support. The EHCI ownweship
change should be claimed by EHCI driver.
USB transfer time-out
1 sec / 5 sec
10 sec / 20 sec
The time-out value for Control, Bulk, and
Interrupt transfers.
Device reset time-out
10 sec / 20 sec
30 sec / 40 sec
USB mass storage 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 descriptor.
Device power-up delay in
seconds
1~40seonds
Delay range is 1..40 seconds, in one
second increments