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Chapter 4: AMI BIOS Setup
BIOS Setting
Description
Setting
Option
Effect
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
4.2.2.12 Platform Trust Technology