WinSystems COMeT10-3900 Owner's manual

WINSYSTEMS, Inc. | 2890 112th Street, Grand Prairie, Texas 75050 | 817-274-7553 | [email protected] | www.winsystems.com
COMeT10-3900
Supplemental BIOS Manual

COMeT10-3900
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Revision History
Copyright and Trademarks
Copyright 2021, WINSYSTEMS, Inc.
No part of this document may be copied or reproduced in any form or by
any means without the prior written consent of WINSYSTEMS, Inc. The
information in the document is subject to change without notice. The
information furnished by WINSYSTEMS, Inc. in this publication is believed
to be accurate and reliable. However, WINSYSTEMS, Inc. makes no
warranty, express, statutory, implied or by description, regarding the
information set forth herein or regarding the freedom of the described
devices from patent infringement. WINSYSTEMS, Inc. makes no warranty
of merchantability or fitness for any purpose. WINSYSTEMS, Inc. assumes
no responsibility for any errors that may appear in this document.
Trademark Acknowledgments
WINSYSTEMS is a registered trademark of WINSYSTEMS, Inc.
Intel and Intel Atom are trademarks of Intel Corporation or its subsidiaries
in the U.S. and/or other countries.
All other marks are the property of their respective companies.
BIOS Version Last Updated
Date Brief Description of Change
45010707 9/29/2021 Initial release

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1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.2 Glossary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2 BIOS Update with UEFI Shell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2.2 Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
3 Embedded Controller (EC) Update with UEFI Shell. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
4 BIOS Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.1 Entering the BIOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
4.2 Main . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
4.3 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
4.3.1 CPU. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.3.2 Chipset Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.3.3 Network Stack. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.3.4 Video . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3.5 PCIe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3.6 SATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.3.7 SCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.3.8 USB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.3.9 LPSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.3.10 Power Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.3.11 Thermal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.3.12 TPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.3.13 Serial Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.3.14 Embedded Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.3.15 HD-Audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.3.16 Console Redirection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.3.17 Debug. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.3.18 Intel I210 Gigabit Network Connection 1 & 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.4 Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
4.4.1 Setup Administrator Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.4.2 User Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table of Contents

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4.4.3 HDD Security Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.4.4 Secure Boot. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.5 Boot. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
4.6 Save & Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
4.6.1 Boot Override . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.6.2 Save Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.6.3 Default Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5 BIOS Factory Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.1 Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
5.2 Hardware. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
6 Software Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.1 Software Design Specification: UEFI Operating System Support . . . . . . . . . . . . . . . . . . . . . .28
6.2 Software Design Specification: Legacy Operating System Support . . . . . . . . . . . . . . . . . . . .28
6.3 Software Design Specification: Boot Device Configuration . . . . . . . . . . . . . . . . . . . . . . . . . .28
6.4 Software Design Specification: BIOS Update Mechanisms. . . . . . . . . . . . . . . . . . . . . . . . . . .28
6.5 Software Design Requirements: BIOS Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
7 AMI POST Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.1 POST Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
8 Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

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1. Introduction
The BIOS used in this design is a custom version of the AMI Aptio V x86
BIOS.
1.1 References
The following Intel Atom E3900 BIOS specification documents can assist
developers in the creation of firmware for the Intel Atom E3900:
• Intel Atom E3900 Platform Intel Architecture Firmware Specification
(Volume 1 of 2), Document Number 559810
• Intel Atom E3900 Platform Intel Architecture Firmware Specification
(Volume 2 of 2), Document Number 559811
• Intel Dynamic Platform and Thermal Framework (Intel DPTF) v8.x 201 -
Rev 1.1, Document Number 556073
1.2 Glossary
•Advanced Configuration and Power Interface (ACPI): Specification
that establishes industry standard interfaces enabling OS directed con-
figuration, power management and thermal management of mobile,
desktop, and server platforms.
•Dynamic Video Memory Technology (DVMT): Allows dynamic alloca-
tion of system memory for use as video memory to ensure the most
efficient use of available resources in order to maximize 2D/3D graph-
ics performance.
•Graphics Processing Unit (GPU): Specialized electronic circuit
designed to rapidly manipulate and alter memory to accelerate the
creation of images in a frame buffer.
•Integrated Graphics Device (IGD): Graphics processor integrated into
the Intel Atom E3900 SOC. The IGD in the Atom E3900 SOC is an Intel
9th Generation GPU, also called Gen9 GPU.
•Unified Extensible Firmware Interface (UEFI): Specification that
defines a software interface between an operating system and plat-
form firmware. UEFI replaces the basic input/output system (BIOS)
firmware interface
2. BIOS Update with UEFI Shell
2.1 Scope
The Unified Extensible Firmware Interface (EFI or UEFI) is a new model for
the interface between operating systems and firmware. It provides a
standard environment for booting an operating system and running pre-
boot applications.

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An optional feature of a UEFI implementation is the ability to boot the
system to a built-in shell. The UEFI shell provides a command prompt and
a rich set of commands that extend and enhance the capability of the UEFI
BIOS.
This section describes the process for updating the COMeT10-3900 BIOS
firmware image using the built-in UEFI shell.
2.2 Process
1. Insert a USB flash drive containing the BIOS update program into a
USB socket on the COMeT10-3900 platform.
2. Turn on the COMeT10-3900 and press ESC or DEL key during the boot
process, which starts the BIOS setup utility.
3. In the BIOS setup utility, use the cursor keys to highlight the Save &
Exit menu option.
4. Use the cursor keys to select UEFI: Built-In EFI Shell from the list of
boot devices displayed under the Boot Override section.
5. Press Enter.
The COMeT10-3900 executes the built-in UEFI shell, and displays a list
of attached storage devices. The USB flash drive shows up in the list;
depending on other boot devices attached, it may be listed as fs0, fs1,
etc.
6. From the UEFI shell command prompt, enter the following command
where Nis the number of the fs device representing the USB flash
drive:
fsN:
The shell prompt changes to indicate that device fsN is now the active
storage device. Example: fs1:
7. Execute the following command:
ls
The output of the ls command is similar to the display listing available
with the Linux or MS-DOS list directory command. If the correct
storage device was selected above, the ls command should show the
BIOS update program in the directory
8. Assuming the BIOS update program is named Update.efi, enter the
following command at the shell command prompt:
Update.efi
The BIOS update program begins executing.
9. When the update program completes, power cycle the platform to
force the new BIOS image to load and execute.

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10. Verify that the BIOS update was successful by comparing the displayed
BIOS version with the version specified in the BIOS update notification.
3. Embedded Controller (EC) Update with UEFI Shell
This section describes the process for updating the COMeT10-3900
embedded controller (EC) image using the built-in Unified Extensible
Firmware Interface (EFI or UEFI for short) shell.
3.1 Process
1. Insert a USB flash drive containing the EC update program into a USB
socket on the COMeT10-3900 platform.
2. Turn on the COMeT10-3900 and press the ESC or DEL key during the
boot process, which starts the BIOS setup utility.
3. In the BIOS setup utility, use the cursor keys to highlight the Save &
Exit menu option.
4. Use the cursor keys to select UEFI: Built-In EFI Shell from the list of
boot devices displayed under the Boot Override section.
5. Press Enter.
The COMeT10-3900 executes the built-in UEFI shell, and displays a list
of attached storage devices. The USB flash drive shows up in the list;
depending on other boot devices attached, it may be listed as fs0, fs1,
etc.
6. From the UEFI shell command prompt, enter the following command
where Nis the number of the fs device representing the USB flash
drive:
fsN:
The shell prompt changes to indicate that device fsN is now the active
storage device. Example: fs1:
7. Execute the following command:
ls
The output of the ls command is similar to the display listing available
with the Linux or MS-DOS list directory command. If the correct
storage device was selected above, the ls command should show the
EC update program in the directory listing obtained with the ls
command.
8. Assuming the EC update program is named Update.efi, enter the
following command at the shell command prompt:
Update.efi
The EC update program begins executing.

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9. When the update program completes, power cycle the platform to
force the new EC image to load and execute.
10. Verify that the EC update was successful by comparing the displayed
EC version in the BIOS with the version specified in the EC update
notification.
4. BIOS Settings
This section provides details on the system parameters that are managed
by the BIOS. Details on the possible parameter values are included.
There are multiple variations of the COMeT10-3900 module. BIOS options
regarding display output and UART support differ based on which module
is being used.
4.1 Entering the BIOS
Enter the BIOS by pressing DEL or ESC during POST. If you are running a
Windows 10 operating system and you cannot enter the BIOS during POST
by pressing either DEL or ESC, then follow the instructions below.
1. Press the Windows key on your keyboard and type “recovery options”
into the search box.
2. Press Enter to open the Windows Recovery settings.
3. Under Advanced startup, click Restart now.
The COMeT10-3900 restarts and boots into the UEFI menu
4. Click the BIOS button to enter the BIOS.
4.2 Main
The Main page of the BIOS displays general information related to the
current BIOS build, including the BIOS and embedded controller firmware
revisions. Information related to the system memory is also displayed on
this page.
System time and date are configurable on the main BIOS page. An
external battery is required to retain time and date if power is removed.
The following BIOS build information is available on the Main BIOS page.

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4.3 Configuration
The BIOS Configuration page serves as the top-level BIOS page for
configuring peripherals and devices present on the COMeT10-3900
platform. The configuration subpages include pages for the CPU, network
interfaces, serial ports, USB ports, SATA, and other features. The settings
for each configuration subpage are described in the device sections.

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4.3.1 CPU
View a summary of the CPU features plus the ability to control vital CPU
features including Power Management.
Section Page Section Page
CPU page 10 Power Control page 17
Chipset page 11 Thermal page 18
Network Stack page 12 TPM page 19
Video page 13 Serial Ports page 20
PCIe page 14 Embedded Controller page 20
SATA page 15 HD-Audio page 21
SCC page 16 Console Redirection page 21
USB page 16 Debug page 21
LPSS page 17 Intel I210 Gigabit Network
Connection #1 and #2
page 22
Feature Description Choices Default
Socket 0 CPU
Information
CPU values specific to the processor in use.
Active Processor
Cores
Number of cores to enable in each processor
package. If disabled, all cores are enabled. If
enabled, cores 1, 2, and 3 can be disabled or
enabled individually. Core 0 is always enabled
and cannot be disabled.
Enable,
Disable
Disable
Intel Virtualization
Technology
Intel VT provides hardware assist to
virtualization software, reducing its size, cost,
and complexity. Special attention is also given
to reduce the virtualization overheads occurring
in cache, I/O, and memory.
Enable,
Disable
Enable
VT-d Provides hardware assists for Intel
Virtualization Technology (VT). This feature can
help improve security and reliability, as well as
improve performance of I/O devices in a virtual
environment.
Enable,
Disable
Disable
Bi-directional
PROCHOT
When a processor thermal sensor trips (any
core), the PROCHOT# is driven and the
processor is throttled. If bi-direction is enabled,
external agents can drive PROCHOT# to throttle
the processor.
Enable,
Disable
Enable
Thermal Monitor Uses the thermal control circuit to regulate the
processor temperature. Allows the processor to
maintain a safe operating temperature without
the need for special software drivers or
interrupt handling routines.
Enable,
Disable
Enable
Monitor Mwait Allows for efficient partitioning and
unpartitioning of shared resources among
logical processors. MONITOR sets up an
effective address range monitored for write-to-
memory activities; MWAIT places the processor
in an optimized state until a write to the
monitored address range.
Enable,
Disable, Auto
Auto

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4.3.2 Chipset Configuration
Set configuration options that are not CPU-specific.
DTS Two on-die digital thermal sensors can be read
via an internal register of the processor. The
DTS is the preferred method of reading the
processor die temperature because they are
located much closer to the hottest portions of
the die.
Enable,
Disable
Disable
CPU Power
Management
Provides settings related to CPU power management such as Intel SpeedStep,
Turbo Mode, and C-States.
• EIST Enhanced Intel SpeedStep allows the CPU to
save power by dynamically changing the
processor clock frequencies. It calculates the
exact frequency needed at any moment by
raising or lowering the clock multiplier and also
adjusts the CPU voltage.
Enable,
Disable
Enable
• Turbo Mode Raises the clock frequency of processor to a
manufacturer-defined turbo speed. System
load, active cores, estimated current, power
consumption, and core temperature are taken
into account in the boosting process.
Enable,
Disable
Enable
• Boot Perfor-
mance Mode
Selects the performance state that the BIOS
sets before OS handoff.
Max
Performance,
Max Battery
Max
Performance
• C-States C-States are the “states” the processor comes to
in order to lower power consumption and
temperature.
Enable,
Disable
Enable
• Enhanced
C-States The C1 state is when the CPU is idle, but is able
to instantly revert to its working state. C1E (C1
Enhanced) is the updated modern version of
the same state.
Enable,
Disable
Enable
• Max Package
C-State
Controls the Max Package C State that the
processor supports.
PC2, PC1, C0 PC2
•MaxCore
C-State Limits the depth of the C-States in the HALT
state.
Fused Value,
Core C10,
Core C9, Core
C8, Core C7,
Core C6, Core
C1, Unlimited
Fused Value
Feature Description Choices Default
Feature Description Choices Default
Max Tolud Sets the maximum Top of Low Usable DRAM
(TOLUD) value, which specifies the memory space
to be used by internal graphics devices, GTT Stolen
Memory, and TSEG, respectively, if these devices
are enabled.
2GB,
2.25 GB,
2.5 GB,
2.75 GB, 3 GB
2 GB
Above 4GB
Decoding
Enables/disables memory mapped I/O for a 64-bit
PCIe device to 4 GB or greater address space.
Enable,
Disable
Disable
8254 Clock
Gating
Enables/disables the legacy 8254 timer and saves
power. Some operating systems do not boot if this
is enabled.
Enable,
Disable
Disable
Serial IRQ Enables/disables SERIRQ. Serialized interrupts are
transmitted over a single shared SERIRQ line. From
a software/OS standpoint, these interrupts are no
different than legacy ISA interrupts.
Enable,
Disable
Enable

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4.3.3 Network Stack
Enabling and configuring IPv4 or IPv6 PXE boot and HTTP boot:
1. Enable either IPv4 or IPv6 PXE boot under the Network Stack tab.
2. Navigate to the Save & Exit tab, select Save Changes and Reset, then
press Enter.
3. Enter the BIOS by pressing DEL or ESC during POST.
4. Navigate to the Boot tab and ensure that Boot Option #1 under Boot
Option Priorities is set to the specific PXE device setup under the
Network tab.
Serial IRQ Mode Sets the Serial IRQ mode as continuous or quiet. In
continuous mode, the host continually generates
SERIRQ frames to check for device interrupts. In
quiet mode, the host waits for a SERIRQ slave to
generate a request.
Quiet,
Continuous
Continuous
ISH Controller Enables/disables the Integrated Sensor Hub (ISH)
controller. The ISH enables the ability to offload
sensor polling and algorithm processing to a
dedicated low power co-processor.
Enable,
Disable
Disable
Beep Enable Enables/disables all beeps during boot. Enable,
Disable
Enable
Feature Description Choices Default
Feature Description Choices Default
Network Stack Enables/disables the UEFI network stack. Enabling this
feature is required for PXE boot and HTTP boot.
Enable,
Disable
Enable
IPv4 PXE
Support
IPv4 PXE (Pre eXecution Environment) boot is a client-
server communication tool using Trivial File Transfer
Protocol (TFTP).
Enable,
Disable
Disable
IPv4 HTTP
Support
IPv4 HTTP boot is client-server communication boot
option. HTTP boot is a higher performance
replacement for PXE boot.
Enable,
Disable
Disable
IPv6 PXE
Support
IPv6 PXE boot is a client-server communication tool
using TFTP.
Enable,
Disable
Disable
IPv6 HTTP
Support
IPv6 HTTP boot is client-server communication boot
option. HTTP boot is a higher performance
replacement for PXE boot.
Enable,
Disable
Disable
PXE boot wait
time
Sets the wait time in seconds to allow the user to
abort the PXE boot by pressing the ESC key.
0 - 5 0
Media detect
count
Sets the number of times the system searches for a
PXE boot server before moving on to the next device
in the boot order. (See “Boot” for setting boot device
priority.)
1 - 50 1

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4.3.4 Video
There are two variations of the COMeT10-3900 module providing support
for either LVDS or eDP output.
LVDS Options
Feature Description Choices Default
GOP Driver Enables/disables the Graphics Output Protocol
(GOP) driver. When the GOP driver is enabled, it
replaces and turns off the Video BIOS (VBIOS) and
enables the use of UEFI pre-boot firmware
without CSM. When GOP is disabled, the VBIOS is
turned on and requires Compatibility Support
Module (CSM) to be enabled as well. To enable
CSM, see “Boot” on page 24.
Enable,
Disable
Enable
VBT Select Selects the desired video configuration for the
Video BIOS Table (VBT) data passed to operating
system while it boots.
Display Port,
LVDS, Dual
Display
Display Port
LVDS Bridge Enables/disables LVDS Bridge, which provides
configuration options for the LVDS panel
interface. This option is automatically enabled if
VBT Select is set to LVDS, or Dual Display.
Enable,
Disable
Disable
IGD Flat Panel Selects the panel resolution. If the desired
resolution is not available, use the Custom Profile
option and adjust the settings to match your
panel.
NOTE: LVDS Bridge must be enabled to view this
option.
640 x 480,
800 x 480,
800 x 600,
1024 x 768,
1280 x 720,
1366 x 768,
1600 x 900,
Custom Profile
1024 x 768
Bpp Select Selects the LVDS color depth, either 18 or 24 bits
per pixel.
NOTE: LVDS Bridge must be enabled to view this
option.
18 bpp, 24 bpp 18 bpp
GOP Brightness
Level
Adjusts the intensity of the LCD panel.
NOTE: LVDS Bridge must be enabled to view this
option.
20, 40, 60, 80,
100, 120, 140,
160, 180, 200,
220, 240, 255
140
Custom Profile
Settings
Configure the parameters according to the specific LVDS panel specification.
NOTE: LVDS Bridge must be enabled, as well as IGD Flat Panel set to Custom
Profile to view this option.
•PixelClock
in kHz Pixel clock in kilohertz 10 to 655000 2500
•HActive
Pixels Active pixels, horizontal 480 to 1600 1600
•HBlank
Pixels Blank pixels, horizontal 0 to 1000 160
• H Offset
Pixels Offset pixels, horizontal 0 to 1000 16
•HWidth
Pixels Width pixels, horizontal 0 to 1000 96
•VActive
Lines Active lines, vertical 480 to 900 900
•VBlank
Lines Blank lines, vertical 0 to 1000 45

COMeT10-3900/BIOS Settings
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eDP Options
4.3.5 PCIe
The four PCIe lanes (channels 0-3) provided by the COMeT10-3900 are
configured as one x4 PCIe lane.
The four PCIe lanes (channels 0-3) can be arranged in different
configurations as shown in the list below. Contact a WINSYSTEMS
application engineer for additional information.
• Three x1 PCIe lanes
– Four x1 PCIe lanes if not using on-board LAN
• Two x1 PCIe lanes, one x2 PCIe lane
• V Offset
Lines
Offset lines, vertical 0 to 50 10
•VWidth
Lines
Width lines, vertical 0 to 50 2
Feature Description Choices Default
GOP Driver Enables/disables the Graphics Output Protocol
(GOP) driver. When the GOP driver is enabled, it
replaces and turns off the Video BIOS (VBIOS) and
enables the use of UEFI pre-boot firmware
without CSM. When GOP is disabled, the VBIOS is
turned on and requires Compatibility Support
Module (CSM) to be enabled as well. To enable
CSM, see “Boot” on page 24.
Enable,
Disable
Enable
VBT Select Selects the desired video configuration for the
Video BIOS Table (VBT) data passed to operating
system while it boots.
Display Port,
LVDS, Dual
Display
Display Port
LVDS Bridge Enables/disables LVDS Bridge, which provides
configuration options for the LVDS panel interface.
This option is automatically enabled if VBT Select
is set to LVDS, or Dual Display.
Enable,
Disable
Disable
IGD Flat Panel Selects the panel resolution for the eDP display. Auto,
640 x 480,
800 x 600,
1024 x 768,
1280 x 1024,
1366 x 768,
1680 x 1050,
1980 x 1200,
1280 x 800
Auto
Panel Scaling Scale the panel output to best suit the display
requirements.
Auto,
Centering,
Stretching
Auto
GOP Brightness
Level
Set GOP brightness level. 20, 40, 60, 80,
100, 120,
140, 160,
180, 200,
220, 240, 255
140
Feature Description Choices Default

COMeT10-3900/BIOS Settings
v1.1 www.winsystems.com Page 15
•Twox2PCIelanes
• One x4 PCIe lane (default)
NOTE If using configuration 1, only three x1 PCIe lanes are available due to the
LAN (Intel I210) using one of the available four root ports.
4.3.6 SATA
Control the SD/GPIO mux and the on-board eMMC device.
Feature Description Choices Default
PCI Express Root
Port
Controls the PCIe root port.
• Auto: Disables unused port automatically
for optimum power savings.
• Enable: Enables port.
• Disable: Disables port.
Auto, Enable,
Disable
Enable
ASPM Sets Active State Power Management (ASPM),
which provides power savings while otherwise in a
fully active state. L0s mode is for one direction of
the link, usually downstream of the PHY
controller. L1 mode is bidirectional and results in
greater power reductions though with a greater
exit latency.
Disable, L0s,
L1, L0sL1,
Auto
Auto
Hot Plug Provides support to allow PCIe hotplug. Enable,
Disable
Disable
PCIe Speed Selects the PCIe port speed.
• Auto matches the speed of the inserted
device.
• Gen1 supports up to 2.5 GigaTransfers per
second.
• Gen2 supports up to 5 GigaTransfers per
second.
Auto, Gen1,
Gen2
Auto
PCIe Selectable
De-emphasis
When the link is operating at 5.0 GT/s, this bit
selects the level of de-emphasis for an upstream
component.
1b -3.5 dB
0b -6 dB
Enable,
Disable
Enable
Feature Description Choices Default
Chipset SATA Enable or disable the chipset SATA controller. This
controller supports two internal SATA ports
Enable,
Disable
Enable
SATA Mode
Selection
Determines how the SATA controllers operate. AHCI AHCI
SATA I/F Speed Selects the SATA interface speed:
• Gen 1 = 1.5 Gbps
• Gen 2 = 3 Gbps
• Gen 3 = 6 Gbps (Default)
Default, Gen
1, Gen 2, Gen
3
Default
SATA Port 0 Enables/disables the SATA port at connector J3. Enable,
Disable
Enable
Port 0 Displays “Not Installed” if no device is present.
Otherwise, the device information is displayed.
Device Type Identify if the SATA port is connected to a solid
state drive or hard disk drive.
Hard Disk
Drive, Solid
State Drive
Hard Disk
Drive
SATA Port 1 Enables/disables the SATA port on the PCIe Mini-
Card.
Enable,
Disable
Enable

COMeT10-3900/BIOS Settings
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4.3.7 SCC
Control the SD/GPIO mux and the on-board eMMC device.
4.3.8 USB
Configure the COMeT10-3900 USB ports and view a summary of installed
devices.
Port 1 Displays “Not Installed” if no device is present.
Otherwise, the device information is displayed.
Device Type Device Type Identify if the SATA port is connected
to a solid state drive or hard disk drive.
Hard Disk
Drive, Solid
State Drive
Hard Disk
Drive
Feature Description Choices Default
Feature Description Choices Default
SD/GPIO Select Enables either the SD card interface or on-board
GPIO.
GPIO, SD SD
SD Max Speed Selects the SD card interface max speed:
• SDR104 = 208 MHz
• SDR50 = 100 MHz
• DDR50 = 50 MHz
NOTE: Only available when SD is selected.
SDR104,
SDR50,
DDR50
DDR50
eMMC Interface Enables/disables the on-board eMMC storage
device
Enable,
Disable
Enable
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
#2-7
Enables/disables the USB 2.0 ports. Provides control to
all ports of an 8-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

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4.3.9 LPSS
Configure I2C Interface.
4.3.10 Power Control
Specify settings for CPU hibernation and ACPI sleep states.
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
Feature Description Choices Default
I2C Bus Enables/disables the I2C bus. When set to PCI
mode the PnP software uses PCI registers for
device configuration. When set to ACPI mode the
PnP software uses ACPI methods for device
configuration.
Disable, PCI
Mode, ACPI
Mode
PCI Mode
I2C Bus Speed Speed Sets the I2C bus speed to the following
choices:
• Standard Mode = 100 kHz
• Fast Mode = 400 kHz
• Fast Plus Mode = 1 MHz
• High Speed Mode = 3.4 MHz
Standard
Mode, Fast
Mode, Fast
Plus Mode,
High Speed
Mode
Standard
Mode
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 used by the operating
system. A cold reset starts up from a complete
powerless state. A warm reset regains its initial
state without hampering the power source.
Warm Reset,
Cold Reset
Cold Reset

COMeT10-3900/BIOS Settings
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4.3.11 Thermal
Configure ACPI parameters for operating system thermal management.
NOTE The features listed after DTPF are shown only if DTPF is enabled.
Wake on Lan Permits the two Ethernet ports to wake the system
from a sleep state.
Enable,
Disable
Enable
State After G3 Specify which state to enter when power is re-
applied after a power failure (G3 state).
• S0 State: System boots directly as soon as
power is re-applied.
• S5 State: System remains powered off until
power button is pressed.
• Last State: System remains off if system was
off during power failure or boot directly if
system was on during power failure.
S0 State, S5
State, Last
State
S0 State
Feature Description Choices Default
Feature Description Choices Default
Automatic
Thermal Reporting
Permits the BIOS to automatically configure
critical, passive, and active trip points to ACPI
enabled operating systems. Set to Disable for
manual configuration.
Enable,
Disable
Disable
Critical Trip Point Controls the temperature of the ACPI Critical Trip
Point, which is the point at which the OS shuts
the system off.
15 to 125 C 125 C
Passive Trip Point Controls the temperature of the ACPI Passive
Trip Point, which is the point at which the OS
begins throttling the processor.
15 to 111 C,
Disable
111 C
Active Trip Point Controls the temperature of the ACPI Active Trip
Point, which is the point at which the OS turns
the fan on.
15 to 110 C 60 C
DPTF Enables/disables Intel Dynamic Platform and
Thermal Framework (DPTF), which provides
various platform level power and thermal
management technologies that enable quiet and
cool platform designs.
Enable,
Disable
Disable
NOTE: The features below are shown only if DTPF is enabled.
DPTF Processor Enables/disables the Processor Participant
Device.
Enable,
Disable
Enable
Active Thermal
Trip Point
Controls the temperature of the ACPI Active
Thermal Trip Point. A value of 0 causes the DPTF
driver to disable the trip point.
0 to 127 90
Passive Thermal
Trip Point
Controls the temperature of the ACPI Passive
Thermal Trip Point. A value of 0 causes the DPTF
driver to disable the trip point.
0 to 127 100
S3/CS Thermal Trip
Point
Controls the temperature of the ACPI Critical
Thermal Trip Point for entering S3 or CS. A value
of 0 causes the DPTF driver to disable the trip
point.
0 to 127 110
Hot Thermal Trip
Point
Controls the temperature of the ACPI Hot
Thermal Trip Point. A value of 0 causes the DPTF
driver to disable the trip point.
0 to 127 110
Critical Thermal
Trip Point
Controls the temperature of the ACPI Critical
Thermal Trip Point. A value of 0 causes the DPTF
driver to disable the trip point.
0 to 127 105

COMeT10-3900/BIOS Settings
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4.3.12 TPM
Disable/enable the onboard TPM 2.0 device as well as the Platform
Configuration Registers (PCR) for each supported hash algorithm.
Thermal Sampling
Period
Specifies the polling interval in 10ths of seconds.
A value of 0 tells the driver to use interrupts. The
granularity of the sampling period is 0.1 seconds.
For example, if the sampling period is 30
seconds, then _TSP needs to report 300; if the
sampling period is 0.5 seconds, then choose 5.
0 to 100 0
DPTF Policies Controls the temperature of the ACPI Active Trip Point, which is the point at
which the OS turns the fan on.
• Active Policy Enables/disables the Active Policy algorithm,
which cools a platform through the removal of
heat instead of limiting the power or
performance of the device. Usually a platform
fan is run at various speeds in response to the
thermal conditions.
Enable,
Disable
Enable
•Passive
Policy Sets the Passive Policy, which is responsible for
limiting power and performance of components
in response to a participant's temperature rising
above the platform defined trip point. Passive
Policy 2.0 uses a new ACPI object to configure the
temperature thresholds. It may not be
compatible with Linux.
Disable,
Passive
Policy 1.0,
Passive
Policy 2.0
Passive Policy
2.0
• TRT Revision Sets the Thermal Relationship Table (TRT), which
informs the OS the relative thermal contribution
of each device to each thermal zone.
Traditional,
Priority
Priority
• CriticalPolicy Enables/disables the Critical Policy. In the event
the platform reaches a critical temperature, the
Critical Policy is responsible for gracefully
shutting down the system.
Enable,
Disable
Enable
• Power Boss Enables/disables the Power Boss policy. The goal
of the policy is to prevent platform shutdown
due to a power “brown out” due to a peak or
sustained power load that is not supported by
the present power source.
Enable,
Disable
Enable
Feature Description Choices Default
Feature Description Choices Default
Security Device
Support
Enables/disables BIOS support for security device.
If disabled, the OS does not show a security device
and the TCG EFI protocol and INT1A interface are
not available.
Enable,
Disable
Enable
SHA-1 PCR Bank Enables/disables SHA-1 PCR Bank.
NOTE: Only available if Security Device Support is
enabled.
Enable,
Disable
Enable
SHA256 PCR
Bank
Enables/disables SHA256 PCR Bank.
NOTE: Only available if Security Device Support is
enabled.
Enable,
Disable
Enable
Pending
operation
Selecting TPM Clear schedules a reset operation
for the security device and executes after saving
the BIOS and rebooting the system.
NOTE: Only available if Security Device Support is
enabled.
None, TPM
Clear
None

COMeT10-3900/BIOS Settings
v1.1 www.winsystems.com Page 20
NOTE You must navigate to the Save & Exit tab, select Save Changes and Reset,
then press Enter for the TPM reset to occur.
4.3.13 Serial Ports
Configure the two serial ports. Serial port menus are different depending
on module type.
•Atype=HSUART
• L type = Legacy UART
4.3.14 Embedded Controller
Configure the embedded controller functions (Watchdog Timer) and view
ambient temperature and SOC voltages.
The following parameters are provided for reference and are updated
every half-second:
• Memory Temperature
• Ambient Temperature
•CoreVoltage
•+5VVoltage
•+3.3Voltage
Feature Description Choices Default
Module Legacy
UART 1
Controls and configures UART 1. This port
supports only RS-232 protocol.
Enable,
Disable
Enable
• Change
Settings Sets IO address and IRQ settings for Legacy UART
1.
NOTE: Module Legacy UART 1 must be enabled
to view this option.
Module Legacy
UART 2
Controls and configures UART 2. This port
supports only RS-232 protocol.
Enable,
Disable
Enable
• Change
Settings
Sets IO address and IRQ settings for Legacy UART
2.
NOTE: Module Legacy UART 2 must be enabled
to view this option.
Module High
Speed UART 1
Enables/disables LPSS HSUART #1 support. Disable, PCI
Mode, ACPI
Mode
Disable
Module High
Speed UART 2
Enables/disables LPSS HSUART #1 support. Disable, PCI
Mode, ACPI
Mode
Disable
Feature Description Choices Default
Watchdog Timer Controls the watchdog timer (WDT) on the EC. If
enabled, mode and time-out can be configured.
Enable,
Disable
Disable
Time-Out Selects WDT time-out value. 1 to 255 0
Mode Selects WDT time units. Seconds,
Minutes
Minutes