IBASE Technology IB836 Series User Manual page 67

4.4.9 USB Configuration
BIOS Setting
Legacy USB Support
XHCI Hand-off
USB Mass Storage
Driver Support
USB Transfer
time-out
Device reset time-out
Device power-up
delay
IB836 User's Manual
Description
•
Enabled enables Legacy USB support.
•
Auto disables legacy support if there is no
USB device connected.
•
Disabled keeps USB devices available only
for EFI applications.
This is a workaround for OSes without XHCI
hand-off support. The XHCI ownership change
should be claimed by XHCI driver.
Enables / Disables the support for USB mass
storage driver.
The time-out value (1 / 5 10 / 20 secs) for Control,
Bulk, and Interrupt transfers.
Gives seconds (10 / 20 / 30 / 40 secs) to delay
execution of Start Unit command to USB mass
storage device.
The 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. But for a Hub port, the delay is taken from
Hub descriptor.
4
BIOS Setup
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