SBC35-427/BIOS Settings
v1.0
www.winsystems.com
Page 14
4.3.6 USB
Configure the SBC USB ports and view a summary of installed devices.
4.3.7 Power Control
Specify settings for CPU hibernation and ACPI sleep states.
Feature
Description
Choices
Default
USB 3.0 Port #1 Enables/disables USB port #1. When disabled, any
devices plugged into the connector are not detected
by BIOS or OS. This is the top socket on the dual
stacked connector (J17).
Enable,
Disable
Enable
USB 3.0 Port #2 Enables/disables USB port #2. When disabled, any
devices plugged into the connector are not detected
by BIOS or OS. This is the bottom socket on the dual
stacked connector (J17).
Enable,
Disable
Enable
USB 2.0 Ports
#1-4
Enables/disables the USB 2.0 ports. Provides control
to all ports of a 4-port USB 2.0 hub. When disabled,
any devices plugged into any of the ports are not
detected by BIOS or OS.
Enable,
Disable
Enable
Legacy USB
Support
Enables/disables Legacy USB support. The Auto option
disables legacy support if no USB devices are
connected. The Disable option keeps USB devices
available only for EFI applications.
Auto, Enable,
Disable
Enable
XHCI Hand-off
Enables/disables a workaround for OSes without XHCI
hand-off support. The XHCI ownership change should
be claimed by XHCI driver.
Enable,
Disable
Enable
USB Mass
Storage Driver
Support
Enables/disables USB mass storage driver support.
The USB mass-storage specification provides an
interface to a number of industry-standard command
sets, allowing a device to disclose its subclass.
Enable,
Disable
Enable
USB transfer
time-out
Sets the time-out value for Control, Bulk, and Interrupt
transfers.
1 sec, 5 sec,
10 sec, 20 sec
20 sec
Device reset
time-out
Sets the USB mass storage device Start Unit command
time-out.
10 sec, 20 sec,
30 sec, 40 sec
20 sec
Device power-
up delay
Specifies the maximum time the device takes before it
properly reports itself to the host controller. Auto uses
default value: for a Root port it is 100 milliseconds,
and for a Hub port the delay is taken from the Hub
descriptor.
Auto, Manual Auto
Device power-
up delay in
seconds
Specifies the delay before the device begins to power
up (seconds).
NOTE:
Device power-up delay must be set to manual
to view this option.
1 to 40
5
Feature
Description
Choices
Default
Enable
Hibernation
Enables/disables the system’s ability to Hibernate
(S4 Sleep State). This option may be not effective
with some operating systems.
Enable,
Disable
Enable
ACPI Sleep
State
Selects the highest ACPI sleep state the system
enters when the SUSPEND button is pressed.
Suspend
Disable,
S3 (Suspend
to Ram)
S3 (Suspend
to Ram)
OS Reset Select Selects the reset type in the Fixed ACPI Description
(FADT) Table
Warm Reset,
Cold Reset
Cold Reset
Wake On Lan
Permits the two Ethernet ports to wake the system
from a sleep state.
Enable,
Disable
Disable
