IBASE IB892 - Manual (Page 28)

BIOS SETUP
24 IB892 User’s Manual
USB Configuration
USB Configuration Parameters.
Aptio Setup Utility
Main Advanced Chipset Boot Security Save & Exit
USB Configuration
→ ←
Select Screen
↑↓ Select Item
Enter: Select
+- Change Field
F1: General Help
F2: Previous Values
F3: Optimized Default
F4: Save ESC: Exit
USB Devices:
1 Keyboard, 1 Hubs
Legacy USB Support Enabled
EHCI Hand-off Enabled
USB hardware delays and time-outs:
USB transfer time-out 20 sec
Device reset time-out 20 sec
Device power-up delay Auto
Legacy USB Support
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
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
The time-out value for Control, Bulk, and Interrupt transfers.
Device reset time-out
USB mass storage device Start Unit command time-out.
Device power-up delay
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 100 ms, for
a hub port the delay is taken from Hub Descriptor.