BIOS Setup
AMI220 / 221 / 222 User Manual
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4
4.4.10 USB Configuration
BIOS Setting
Description
Legacy USB Support
Enables / Disables Legacy USB support.
•
Auto
disables legacy support if there is no
USB device connected.
•
Disable
keeps USB devices available only
for EFI applications.
XHCI Hand-pff
This is a workaround for OSes without XHCI
hand-off support. The XHCI ownership change
should be claimed by XHCI driver.
USB Mass Storage Driver
Support
Enables / Disables USB mass storage driver
support.
Port 60/64 Emulation
Enables / Disables I/O port 60h/64h emulation
support. This should be enabled for the
complete USB keyboard legacy support for
non-USB aware OSes.
USB Transfer time-out
Sets the time-out value 1, 5, 10 or 20 sec(s) for
Control, Bulk, and Interrupt transfers.
Device reset time-out
Sets the seconds (10, 20, 30, 40 secs) of
delaying execution of start unit command to
USB mass storage device.
Summary of Contents for AMI220
Page 1: ...AMI220 AMI221 AMI222 High Performance Fanless System User s Manual Version 1 1 Feb 2019...
Page 25: ...General Information AMI220 221 222 User Manual 17 1 1 11 Dimensions AMI220 Unit mm...
Page 26: ...18 AMI220 221 222 User Manual 1 12 Dimensions AMI221 Unit mm...
Page 27: ...General Information AMI220 221 222 User Manual 19 1 1 13 Dimensions AMI222 Unit mm...