USER MANUAL
CHAPTER 3
AMI UEFI BIOS SETUP
IKMH100 M-SERIES BOX PC
32
EHCI Hand‐off
This is a
workaround for
OSs without ECHI
hand‐ off support.
The EHCI
ownership change
should be claimed
by EHCI driver.
*Disabled
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
