USER MANUAL
CHAPTER 4
AMI UEFI BIOS SETUP
- 58 -
XHCI Hand
‐
off
This is a
workaround for
OSs without XHCI
hand
‐
off support.
Disable
Disables this
function
Enable
Enables this
function
EHCI Hand
‐
off
This is a
workaround for
OSs without ECHI
hand
‐
off support.
Disable
Disables this
function
Enable
Enables this
function
USB mass
storage driver
support
User can Enable
or disable USB
mass storage
driver support.
Disable
Disables this
function
Enable
Enables this
function
USB Transfer
time
‐
out
The time
‐
out
value for control,
bulk, and interrupt
transfers.
1 Sec
5 Sec
10 Sec
20 Sec
Depends on the
time
‐
out value
Device Reset
time
‐
out
USB mass
storage device
start unit
command time
‐
out.
10 Sec
20 Sec
30 Sec
40 Sec
Depends on the
time
‐
out value
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