DFI M8M051 User manual

M8M051
A-609-M-2040
2.5" Pico-ITX Motherboard
User’s Manual
© December 26, 2022 DFI Inc.

2User's Manual | M8M051
Copyright
This publication contains information that is protected by copyright. No part of it may be
reproduced in any form or by any means or used to make any transformation/adaptation
without the prior written permission from the copyright holders.
This publication is provided for informational purposes only. The manufacturer makes
no representations or warranties with respect to the contents or use of this manual and
specifically disclaims any express or implied warranties of merchantability or fitness for any
particular purpose. The user will assume the entire risk of the use or the results of the use of
this document. Further, the manufacturer reserves the right to revise this publication and make
changes to its contents at any time, without obligation to notify any person or entity of such
revisions or changes.
Changes after the publication’s first release will be based on the product’s revision. The website
will always provide the most updated information.
© 2022. All Rights Reserved.
Trademarks
Product names or trademarks appearing in this manual are for identification purpose only and
are the properties of the respective owners.
FCC and DOC Statement on Class B
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is operated in a residential
installation. This equipment generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction manual, may cause harmful interference
to radio communications. However, there is no guarantee that interference will not occur
in a particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and the receiver.
• Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
• Consult the dealer or an experienced radio TV technician for help.
Notice:
1. The changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
2. Shielded interface cables must be used in order to comply with the emission limits.

3User's Manual | M8M051
Table of Contents
Chapter 1 - Introduction................................................................................................................6
Specifications ......................................................................................................................... 6
Features ..................................................................................................................................7
Chapter 2 - Hardware Installation................................................................................................8
Board Layout...........................................................................................................................8
Installing the Heat Sink................................................................................................... 9
Jumper Settings ...................................................................................................................10
Boot-CFG (JP1)..............................................................................................................10
Audio (JP4) ....................................................................................................................10
LED Backlight (JP5) ......................................................................................................11
External I/O Ports.................................................................................................................12
+12V DC-in .....................................................................................................................12
USB 3.1 Gen 1 & Micro USB 2.0...................................................................................13
LAN (RJ-45)....................................................................................................................13
COM 3 (RS485)..............................................................................................................14
Graphics Display............................................................................................................14
Internal I/O Connectors .......................................................................................................15
J3 USB 2.0 Headers (3/4).............................................................................................15
J10 Debug(COM1).........................................................................................................15
J8 I²C ..............................................................................................................................16
J5 DIO.............................................................................................................................16
J11 LVDS........................................................................................................................17
J9 COM2 / COM4 ..........................................................................................................18
J7 Front Panel................................................................................................................18
J1 Battery.......................................................................................................................19
CN12 CANbus 2.0..........................................................................................................19
Expansion Slots....................................................................................................................20
SIM Slot / I2C Connector..............................................................................................20
microSD Socket .............................................................................................................20
Chapter 3 - Software User Guide...............................................................................................21
Yocto OS - Flash Images into eMMC/SD card using UUU tool ........................................21
Windows winusb driver install for Windows UUU tool......................................................23
Flash image into SD card ....................................................................................................24
Android OS - Flash Images into eMMC/SD card using UUU tool.....................................25
Software Features ................................................................................................................26
General Support List......................................................................................................26
Linux AP/API Support List ............................................................................................26
Yocto Support List.........................................................................................................26
Android Support List .....................................................................................................28

4User's Manual | M8M051
About this Manual
This manual can be downloaded from the website.
The manual is subject to change and update without notice, and may be based on editions
that do not resemble your actual products. Please visit our website or contact our sales
representatives for the latest editions.
Warranty
1. Warranty does not cover damages or failures that arise from misuse of the product,
inability to use the product, unauthorized replacement or alteration of components and
product specifications.
2. The warranty is void if the product has been subjected to physical abuse, improper
installation, modification, accidents or unauthorized repair of the product.
3. Unless otherwise instructed in this user’s manual, the user may not, under any
circumstances, attempt to perform service, adjustments or repairs on the product,
whether in or out of warranty. It must be returned to the purchase point, factory or
authorized service agency for all such work.
4. We will not be liable for any indirect, special, incidental or consequential damages to
the product that has been modified or altered.
Static Electricity Precautions
It is quite easy to inadvertently damage your PC, system board, components or devices even
before installing them in your system unit. Static electrical discharge can damage computer
components without causing any signs of physical damage. You must take extra care in
handling them to ensure against electrostatic build-up.
1. To prevent electrostatic build-up, leave the system board in its anti-static bag until you
are ready to install it.
2. Wear an antistatic wrist strap.
3. Do all preparation work on a static-free surface.
4. Hold the device only by its edges. Be careful not to touch any of the components,
contacts or connections.
5. Avoid touching the pins or contacts on all modules and connectors. Hold modules or
connectors by their ends.
Important:
Electrostatic discharge (ESD) can damage your processor, disk drive and other
components. Perform the upgrade instruction procedures described at an ESD
workstation only. If such a station is not available, you can provide some ESD
protection by wearing an antistatic wrist strap and attaching it to a metal part
of the system chassis. If a wrist strap is unavailable, establish and maintain
contact with the system chassis throughout any procedures requiring ESD
protection.
Safety Measures
• To avoid damage to the system, use the correct AC input voltage range.
• To reduce the risk of electric shock, unplug the power cord before removing the
system chassis cover for installation or servicing. After installation or servicing, cover
the system chassis before plugging the power cord.

5User's Manual | M8M051
About the Package
The package contains the following items. If any of these items are missing or damaged,
please contact your dealer or sales representative for assistance.
• 1 M8M051 board
• 1 Terminal block for RS485 (COM3)
• Heat spreader (Height: 11mm)
Note: The items are subject to change in the developing stage.
The board and accessories in the package may not come similar to the information listed
above. This may differ in accordance with the sales region or models in which it was sold. For
more information about the standard package in your region, please contact your dealer or
sales representative.
Before Using the System Board
When installing the system board in a new system, you will need at least the following internal
components.
• Power adapter
External system peripherals may also be required for navigation and display, including at least a
keyboard, a mouse and a video display monitor.

6
Chapter 1
INTRODUCTION
User's Manual | M8M051
Chapter 1 - Introduction
XSpecifications
SYSTEM Processor i.MX 8M applications processors
NXP i.MX 8M Quad Cortex-A53, 1.5GHz (Commercial)
NXP i.MX 8M Dual Cortex-A53, 1.5GHz (Commercial)
NXP i.MX 8M Quad Cortex-A53, 1.3GHz (Industrial)
NXP i.MX 8M Dual Cortex-A53, 1.3GHz (Industrial)
Memory 2GB/4GB Memory Down
Single Channel LPDDR4 up to 3200 MHz
GRAPHICS Controller GC7000 Lite
Feature OpenVG 1.1, OGL ES 3.1, Vulkan, OCL 1.2 FP
VPU Decode: 4Kp60 HEVC H.265, VP9, 4Kp60 H.264
Display 1 x HDM (default)
1 x LVDS
HDMI: resolution up to 4096x2160 @60Hz
LVDS: resolution up to 1920x1080 @60Hz
Single Display HDMI or LVDS
EXPANSION Interface 1 x M.2 B key 3042/2242 (USB 3.1 Gen1)
Nano SIM slot support (available upon request)
1 x M.2 E key 2230 (PCIe x1/USB 2.0)
AUDIO Audio Codec SGTL5000
ETHERNET Controller 1 x AR8035 Ethernet (10/100/1000Mbps)
External I/O Ethernet 1 x GbE (RJ-45)
Serial 1 x RS485
USB 2 x USB 3.1 Gen1
1 x Micro USB 2.0 (Download mode)
Display 1 x HDMI
INTERNAL I/O Serial 1 x RS232
1 x RS-232/422/485 (2 x 6 pin header, 1.27mm pitch)
USB 2 x USB 2.0 (1.27mm pitch)
Display 1 x LVDS LCD Panel Connector
1 x Backlight Power
Audio 1 x Audio (Line-out/Mic-in, 2.00mm pitch)
eMMC Support eMMC 5.1 16GB on board (default)
Support up to 64GB (opt.)
SD 1 x Micro SD Slot
DIO 1 x 8-bit DIO (2 x 6 header, 1.27mm pitch)
I²C 1 x I²C (1.27mm pitch)
CANBus 1 x CANBus 2.0
WATCHDOG
TIMER
Output &
Interval
System Reset, Programmable via Software from 1 to 255 Seconds
POWER Type Single 12V +/-10% DC
Connector 2-poles Terminal Block (default)
DC Jack (available upon request)
Consumption Typical: Quad:12V @ 0.2A (2.4Watt)
Max.: Quad:12V @ 0.38A (4.56Watt)
RTC Battery CR2032 Coin Cell
OS SUPPORT OS Support Yocto 2.5 on eMMC (default)
Android 9.0 (optional)
ENVIRONMENT Temperature Operating: -5 to 65°C, -30 to 80°C
Storage: -40 to 85°C
Humidity Operating: 5 to 90% RH
Storage: 5 to 90% RH
MTBF i.MX 8MQuad: 1,311,832 hrs @ 25°C; 637,427 hrs @ 45°C; 374,475 hrs @
60°C; 189,510 hrs @ 80°C
Calculation model: Telcordia Issue 4
Environment: GB, GC – Ground Benign, Controlled
Mechanism Dimensions 2.5" SBC Form Factor
100mm (3.94") x 72mm (2.83")
Height PCB: 1.6mm Top Side: 15mm, Bottom Side: 4mm
Standards and
Certifications
Certifications CE, FCC, RoHS
Country of Origin Country of
Origin
Taiwan

7
Chapter 1
INTRODUCTION
User's Manual | M8M051
XFeatures
Watchdog Timer
The Watchdog Timer function allows your application to regularly “clear” the system at the set
time interval. If the system hangs or fails to function, it will reset at the set time interval so that
your system will continue to operate.
DDR4
DDR4 delivers increased system bandwidth and improves performance. The advantages of
DDR4 provide an extended battery life and improve the performance at a lower power than
DDR3/DDR2.
Graphics
The integrated GC7000 Lite graphics engine delivers an excellent blend of graphics
performance and features to meet business needs. It provides excellent video and 3D graphics
with outstanding graphics responsiveness. These enhancements deliver the performance and
compatibility needed for today’s and tomorrow’s business applications.
Gigabit LAN
The Gigabit Ethernet Controller supports data transmission at 1Gbps.
Audio
The audio codec provides High Definition audio output.
Wake-On-LAN
This feature allows the network to remotely wake up a Soft Power Down (Soft-Off) PC. It is
supported via the onboard LAN port that uses the PCI PME (Power Management Event) signal.
However, if your system is in the Suspend mode, you can power-on the system only through an
IRQ or DMA interrupt.
Wake-On-USB
This function allows you to use a USB keyboard or USB mouse to wake up a system from the
S3 (STR - Suspend To RAM) state.
ACPI STR
The system board is designed to meet the ACPI (Advanced Configuration and Power
Interface) specification. ACPI has energy saving features that enables PCs to implement
Power Management and Plug-and-Play with operating systems that support OS Direct Power
Management. ACPI when enabled in the Power Management Setup will allow you to use the
Suspend to RAM function.
With the Suspend to RAM function enabled, you can power-off the system at once by pressing
the power button or selecting “Standby” when you shut down Windows®without having to go
through the sometimes tiresome process of closing files, applications and operating system.
This is because the system is capable of storing all programs and data files during the entire
operating session into RAM (Random Access Memory) when it powers-off. The operating
session will resume exactly where you left off the next time you power-on the system.
Power Failure Recovery
When power returns after an AC power failure, you may choose to either power-on the system
manually or let the system power-on automatically.
USB
The system board supports the new USB 3.1 Gen 1. It is capable of running at a maximum
transmission speed of up to 5 Gbit/s, or 625 MB/s. USB 3.1 reduces the time required for data
transmission, reduces power consumption, and is backward compatible with USB 2.0. It is a
marked improvement in device transfer speeds between your computer and a wide range of
simultaneously accessible external Plug and Play peripherals.
RTC Timer
The Real Time Clock (RTC) installed on the system board allows your system to automatically
power-on on the set date and time.

8
Chapter 2
HARDWARE INSTALLATION
User's Manual | M8M051
Chapter 2 - Hardware Installation
XBoard Layout
Note:
Some components are optional and only available upon request.
Important:
Electrostatic discharge (ESD) can damage your board, processor,
disk drives, add-in boards, and other components. Perform
installation procedures at an ESD workstation only. If such a
station is not available, you can provide some ESD protection by
wearing an antistatic wrist strap and attaching it to a metal part
of the system chassis. If a wrist strap is unavailable, establish
and maintain contact with the system chassis throughout any
procedures requiring ESD protection.

9
Chapter 2
HARDWARE INSTALLATION
User's Manual | M8M051
Installing the Heat Sink
The CPU must be kept cool by using a heat sink, otherwise the CPU will overheat damaging
both the CPU and system board.
1. Before you install the fan / heat sink, you must apply a thermal paste onto the top of
the CPU. The thermal paste is usually supplied when you purchase the fan / heat sink
assembly. Do not spread the paste all over the surface. When you later place the heat
sink on top of the CPU, the compound will disperse evenly.
Some heat sinks come with a patch of pre-applied thermal paste. Do not apply thermal
paste if the fan / heat sink already has a patch of thermal paste on its underside. Peel
the strip that covers the paste before you place the fan / heat sink on top of the CPU.
2. Place the heat sink on top of the CPU. The 4 spring screws around the heat sink, which
are used to secure the heat sink onto the system board, must match the 4 mounting
holes around the board.
3. Screw tight two of the spring screws at opposite corners into the mounting holes. And
then proceed with the other two spring screws.
XCPU
Mounting holes

10
Chapter 2
HARDWARE INSTALLATION
User's Manual | M8M051
XJumper Settings
Boot-CFG (JP1)
5-6 Off: EMMC@eSDHC
(default)
5-6 On: uSD@eSDHC2
1-2 Off: Internal Boot
(default)
1-2 On: Serial Downloader
6
5
2
1
6
5
2
1
Audio (JP4)
6
5
2
1
4: R-CH
6
5
2
1
1: Mic Input
6
5
2
1
2/3/5: GND
6
5
2
1
6: L-CH
The JP1 is used to determine the Boot-CFG The JP4 is used to determine the Audio