Usb Configuration; Legacy Usb Support - American Megatrends MI802 User Manual

BIOS SETUP

USB Configuration

Advanced
Main Chipset
USB Configuration
USB Devices:
None

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
Enabled/Disabled. 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 100ms, for
a Hub port the delay is taken from Hub descriptor.
30 MI802 User's Manual
Aptio Setup Utility
Boot Security Save & Exit
→ ←
Select Screen
↑↓ Select Item
Enter: Select
+- Change Opt
Enabled
F1: General Help
Enabled
F2: Previous Values
F3: Optimized Default
F4: Save & EXIT
20 sec
ESC: Exit
20 sec
Auto