DFI GH551 User manual

GH551
Embedded SBC 3.5” Industrial Motherboard
User’s Manual
A-595-M-2019
Preliminary
Version
Preliminary
Version

2User's Manual | GH551
Copyright
This publication contains information that is protected by copyright. No part of it may be repro-
duced 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 specifi-
cally 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 docu-
ment. 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.
© 2020. 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 reason-
able 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 encour-
aged 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 re-
ceiver 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 com-
pliance 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 | GH551
Table of Contents
Chapter 1 - Introduction................................................................................................................6
Specifications ......................................................................................................................... 6
Features .................................................................................................................................. 7
Chapter 2 - Hardware Installation................................................................................................8
Board Layout........................................................................................................................... 8
Standby Power LED................................................................................................................8
System Memory ..................................................................................................................... 9
Installing the SO-DIMM Module ..................................................................................... 9
Heatsink and Fan .................................................................................................................10
Installing the Heatsink and Fan....................................................................................10
Jumper Settings ...................................................................................................................11
Front Panel (JP5)...........................................................................................................11
Clear CMOS (JP1) .........................................................................................................11
Panel Power Select (JP4) .............................................................................................12
Backlight Power Select (JP2).......................................................................................12
APU Power (JP9000) ....................................................................................................13
AT/ATX Select (JP6) .....................................................................................................13
Rear I/O Ports.......................................................................................................................14
Graphics Display............................................................................................................14
USB Ports .......................................................................................................................15
RJ45 LAN Ports .............................................................................................................15
Internal I/O Connectors .......................................................................................................16
12V DC-In .......................................................................................................................16
COM (Serial) Port ..........................................................................................................16
Front Audio.....................................................................................................................17
USB Ports .......................................................................................................................17
Speaker........................................................................................................................... 18
SATA (Serial ATA) ..........................................................................................................18
Battery ............................................................................................................................19
CPU Fan..........................................................................................................................19
Digital I/O .......................................................................................................................20
SMBus ............................................................................................................................20
LVDS Panel (Optional)...................................................................................................21
Heater.............................................................................................................................22
Expansion Slots .............................................................................................................22
Installing the M.2 Module .............................................................................................23
Installing the Mini PCIe Module ...................................................................................24
Chapter 3 - BIOS Settings...........................................................................................................25
Overview ...............................................................................................................................25
Main.......................................................................................................................................26
Advanced .............................................................................................................................26
PTN3460 Config ............................................................................................................27
NCT5525D Super IO Configuration ..............................................................................27
NCT5525D HW Monitor ................................................................................................28
AMD CHIPSET Setting...................................................................................................29
Trusted Computing........................................................................................................31
ACPI Configuration........................................................................................................32
CPU Configuration.........................................................................................................32
Serial Port Console Redirection ...................................................................................33
USB Configuration .........................................................................................................34
Network Stack Configuration........................................................................................34
CSM Configuration ........................................................................................................35
Security .................................................................................................................................35
Boot .......................................................................................................................................36
Save & Exit ............................................................................................................................36
Updating the BIOS................................................................................................................37
Notice: BIOS SPI ROM..........................................................................................................37

4User's Manual | GH551
About this Manual
This manual can be downloaded from the website, or acquired as an electronic file included in
the optional CD/DVD. 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 con-
tact our sales representatives for the latest editions.
Warranty
1. Warranty does not cover damages or failures that arised 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 in-
stallation, modification, accidents or unauthorized repair of the product.
3. Unless otherwise instructed in this user’s manual, the user may not, under any circum-
stances, 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 ser-
vice agency for all such work.
4. We will not be liable for any indirect, special, incidental or consequencial 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 han-
dling 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, con-
tacts or connections.
5. Avoid touching the pins or contacts on all modules and connectors. Hold modules or
connectors by their ends.
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 sys-
tem chassis cover for installation or servicing. After installation or servicing, cover the
system chassis before plugging the power cord.
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 pro-
tection 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.

5User's Manual | GH551
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.
• One GH551 board
• One COM port cable (Length: 250mm, pin header to DB9 port)
• One Serial ATA data cable (Length: 500mm)
• One Serial ATA power cable (Length: 250mm)
• One Heatsink (131.45*78.36*35mm)
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.
Optional Items
• USB cable
• Power adapter
• Audio cable (160mm)
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.
• Memory module
• Storage device such as hard disk drive, CD-ROM, etc.
• Power adaptor
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 | GH551
Chapter 1 - Introduction
XSpecifications
The specifications listed here may be based on editions that do not
resemble your actual products. Please visit the download page at go.dfi.
com/GH551, or via the QR code to the right for the latest datasheet.
SYSTEM Processor AMD®Ryzen™ Embedded
V1605B, 4C/8T, 2MB Cache, 8 CU, 2.0GHz (3.6GHz), 15W
V1202B, 2C/4T, 1MB Cache, 3 CU, 2.3 GHz (3.2GHz), 15W
V1404I, 4C/8T, 2MB Cache, 8 CU, 1.6GHz (2.8GHz), 15W
R1606G, 2C/4T, 3 CU, 2.6GHz (3.5GHz), 15W
R1505G, 2C/4T, 3 CU, 2.4GHz(3.3GHz), 15W
Memory 1 x 260-pin SODIMM up to 16GB
Single Channel DDR4 up to 2400MHz
BIOS AMI SPI 64Mbit
GRAPHICS Controller AMD®Radeon™ Vega Graphics
Feature OpenGL 4.5, DirectX 12, OpenCL 2.1
HW Decode: AVC/H.264, MPEG2, VC1/WMV9, JPEG/MJPEG, HEVC/
H265, VP8, VP9
HW Encode: MPEG2, AVC/H264, JPEG, HEVC/H265, VP8, VP9
Display V1000: 4 x DP++, or 3 x DP++ with 1 x LVDS
R1000: 3 x DP++, or 2 x DP++ with 1 x LVDS
(DP++ resolution up to 4096x2160 @ 120Hz)
(LVDS resolution up to 1920x1200 @ 60Hz)
Multiple
Displays
V1000: 4 x DP++, or 3 x DP++ with 1 x LVDS
R1000: 3 x DP++, or 2 x DP++ with 1 x LVDS
EXPANSION Interface 1 x Full-size mini-PCIe (PCIe/USB 2.0, opt.: USB 3.1 Gen 1)
1 x M.2 2280/2242 M key (Support SATA/PCIe SSD)
AUDIO Audio Codec Realtek ALC262
ETHERNET Controller 3 x Realtek®RTL8111HN/RTL8119I (10/100/1000Mbps)
REAR I/O Ethernet 3 x GbE (RJ-45)
USB 2 x USB 3.1 Gen2
1 x USB 2.0
Display V1000: 4 x DP++
R1000: 3 x DP++
INTERNAL I/O Serial 1 x RS-232/422/485 (2.0mm pitch)
RS485 support auto flow control
USB 1 x USB 2.0 (2.0mm pitch)
Display 1 x LVDS LCD Panel (optional)
1 x Backlight Power (optional)
Audio 1 x Mic-in
1 x Line-out
1 x Speaker-out (2 x 3W, 8ohm)
SATA 1 x SATA 3.0 (up to 6Gb/s)
1 x SATA Power
DIO 1 x 8-bit DIO
SMBus 1 x SMBus
WATCHDOG
TIMER
Output &
Interval
System Reset, Programmable via Software from 1 to 255 Seconds
SECURITY TPM 2.0 fTPM2.0 (default)
dTPM2.0 (opt.)
POWER Type Single 12V DC
Connector 4-pin Right Angle Type Connector (default)
DC Jack (available upon request)
4-pin Vertical Type Connector (available upon request)
RTC Battery CR2032 coin cell
OS SUPPORT Windows 10 IoT Enterprise (64-bit)
Linux
ENVIRONMENT Temperature Operating: -5 to 65°C, -30 to 80°C
Storage: -40 to 85°C
Humidity Operating: 10 to 90% RH
Storage: 10 to 90% RH
MECHANICAL Dimensions 3.5" SBC Form Factor: 146mm (5.75") x 102mm (4.02")
Height PCB: 1.6mm
Top Side: 15.5mm
Bottom Side: 4.0mm
COMPLIANCE CE, FCC Class B, RoHS

7
Chapter 1
INTRODUCTION
User's Manual | GH551
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 AMD®Radeon™ Vega 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.
Serial ATA
Serial ATA is a storage interface that is compliant with SATA 1.0a specification. With speed of
up to 6Gb/s (SATA 3.0), it improves hard drive performance faster than the standard parallel
ATA whose data transfer rate is 100MB/s.
Gigabit LAN
The Realtek®RTL8111HN/RTL8119I Gigabit Ethernet Controllers support data transmission at
1Gbps.
Audio
The Realtek ALC262 audio codec provides 4 channel 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 or via a PCI LAN card that uses the PCI PME (Power Man-
agement 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 Manage-
ment 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 ses-
sion 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 2. It is capable of running at a maximum
transmission speed of up to 10 Gbit/s (1.2 GB/s) and is faster than USB 3.1 Gen 1 (5 Gbit/s, or
625 MB/s), USB 2.0 (480 Mbit/s, or 60 MB/s) and USB 1.1 (12Mb/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 | GH551
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Chapter 2 - Hardware Installation
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 pro-
tection 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.
Note:
Specifications of these components are model-specific. Please refer to the specifi-
cations for detail.
Important:
When the Standby Power LED lights up, it indicates that there is power on the
system board. Power-off the PC then unplug the power cord prior to installing any
devices. Failure to do so will cause severe damage to the motherboard and com-
ponents.
XStandby Power LED
Standby Power LED
XBoard Layout
M.2 M Key
Front Audio
Speaker
JP9000
JP6
JP1
Battery
JP5
JP4
LVDS Backlight
LED1
LVDS
USB 0/3 (USB 2.0)
SMBus
Buzzer
Mini PCIe
COM1
SATA Power
SATA
CPU Fan
DIO
JP2
USB 5 (USB 2.0)
LAN3
LAN2, USB 3.0
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2
3
4
5
6
7
8
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13
14
15
16
17
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21
22
23
24
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LAN1, USB 3.0
DP4
DP3
DP2
DP1
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Heater
12V DC-In
DDR4 (Bottom)
Nano SIM (Bottom)

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HARDWARE INSTALLATION
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• 1 x 260-pin SODIMM up to 16GB
• Single Channel DDR4 up to 2400MHz
XSystem Memory
Features
The system board supports one single channel DDR4 SO-DIMM memory module.
Single Channel (SC)
Data will be accessed in chunks of 64 bits from the memory channels.
DDR4 SO-DIMM
(Bottom Side)
Installing the SO-DIMM Module
Before installing the memory module, please make sure that the following safety cautions are
well-attended.
1. Make sure the PC and all other peripheral devices connected to it has been powered
down.
2. Disconnect all power cords and cables.
3. Locate the SO-DIMM socket on the system board
4. Make sure the notch on memory card is aligned to the key on the socket.
XSystem Memory
Notch
Retention Notch
Key
Socket Top View
DDR4 SO-DIMM
Retention Clip
45°
Step 1
Step 2
Step 3

10
Chapter 2
HARDWARE INSTALLATION
User's Manual | GH551
XSystem Memory
XInstalling the SO-DIMM Module
Please follow the steps below to install the memory card into the socket.
Step 1:
Insert the memory card into the
slot while making sure 1) the
notch and the key are aligned,
and 2) the non-connector end
rises approximately 45 degrees
horizontally. Press the card firmly
into the socket while applying and
maintaining even pressure on both
ends.
Step 2:
Press the end of the card far from
the socket down while making
sure the retention notch and the
clip align as indicated by the dot-
ted line in the illustration. If the
retention notch and the clip do not
align, please remove the card and
re-insert it. Press the card all the
way down.
Step 3:
The clips snap automatically and
abruptly to the retention notches
of the card sounding a distinctive
click, and lock the card in place.
Inspect that the clip sits in the
notch. If not, please pull the clips
outward, release and remove the
card, and mount it again.
Notch
Retention Notch
Key
Socket Top View
DDR3 SO-DIMM
Retention Clip
45°
Step 1
Step 2
Step 3
XHeatsink and Fan
Connect the CPU fan cable to the CPU fan con-
nector on the top side of the module. Omit this
step when installing a fanless heatsink.
Installing the Heatsink and Fan
The system board comes with a heatsink with four spring screws. Four stand-offs are already
welded onto the system board. Remove any plastic cover on the bottom side of the heatsink.
Orient the heatsink so that the interface metal aligns with the APU, the spring screws align with
the stand-offs, and the thinner side of the heatsink sits right on top of the memory. Remove
any plastic cover on the interface metal and apply thermal paste/adhesive if it is required.
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CPU Fan