Usb Configuration; Legacy Usb Support - American Megatrends IB892 User Manual

BIOS SETUP

USB Configuration

USB Configuration Parameters.
Advanced
Main
USB Configuration
USB Devices:
1 Keyboard, 1 Hubs

Legacy USB Support

EHCI Hand-off
USB hardware delays and time-outs:
USB transfer time-out
Device reset time-out
Device power-up delay
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.
24
Aptio Setup Utility
Chipset Boot
Enabled
Enabled
20 sec
20 sec
Auto
IB892 User's Manual
Security Save & Exit
→ ←
Select Screen
↑↓ Select Item
Enter: Select
+- Change Field
F1: General Help
F2: Previous Values
F3: Optimized Default
F4: Save ESC: Exit