DFI SU251/SU253 User manual

Brand: DFI

Model: SU251/SU253

Category: Motherboards

Type: User manual

SU251/SU253

Embedded SBC 4”

User’s Manual

A43840952

This publication contains information that is protected by copyright. No part of it may be re-

produced 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.

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 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 compli-

ance 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.

Table of Contents

Trademarks ....................................................... 2

FCC and DOC Statement on Class B ...... 2

About this Manual .......................................... 4

Warranty ......................................................... 4

Static Electricity Precautions ........................ 4

Safety Measures ............................................... 4

Before Using the System Board .................. 5

Chapter 1 - Introduction .............................. 6

Chapter 2 - Hardware Installation ............. 8

Board Layout.......................................................................................................... 8

Block Diagram .......................................................................................................9

Mechanical Diagram ............................................................................................. 9

System CPU .........................................................................................................10

Installing the Heat Sink ............................................................ 10

System Memory ..................................................................................................11

Jumper Settings ...................................................................................................11

Clear CMOS Data ..................................................................... 11

Auto Power-on Select ............................................................... 12

Mini PCIe Signal Select ............................................................. 12

LVDS Backlight Voltage Select ................................................... 13

LVDS DIMM Control .................................................................. 13

LVDS Panel Voltage Select ......................................................... 14

COM4/DIO Pin Select ................................................................ 14

eDP Backlight Voltage Select (optional)....................................... 15

eDP Panel Voltage Select (optional) ............................................ 15

eDP Invert Voltage Select (optional) ........................................... 16

Front Panel I/O Ports ........................................................................................17

Rear Panel I/O Ports .........................................................................................17

12V DC-in (SU251)/15~36V DC-in (SU253) ................................ 18

Graphics Interfaces .................................................................. 18

USB Ports................................................................................ 19

COM (Serial) Ports ................................................................... 20

RJ45 LAN Ports ........................................................................ 21

Audio ...................................................................................... 21

I/O Connectors ...................................................................................................22

Serial ATA Connector ................................................................ 22

Serial ATA Power Connector ....................................................... 22

LVDS LCD Panel Connector ........................................................ 23

LCD/Inverter Power Connector ................................................... 23

Cooling Fan Connector .............................................................. 24

Chassis Intrusion Connector ..................................................... 24

Expansion Slots ....................................................................... 25

SMBus Connector ..................................................................... 25

Front Panel Connector .............................................................. 26

Standby Power LED .................................................................. 27

Battery ................................................................................... 27

Chapter 3 - BIOS Setup ..............................28

Overview .............................................................................................................28

Insyde BIOS Setup Utility .................................................................................29

Main ....................................................................................... 29

Advanced ............................................................................... 29

Security .................................................................................. 39

Boot ....................................................................................... 41

Exit ........................................................................................ 43

Updating the BIOS .............................................................................................44

Notice: BIOS SPI ROM ......................................................................................44

Chapter 4 - Supported Software ..............45

Chapter 5 - RAID ....................................... 60

Chapter 6 - Intel AMT Settings ................. 64

Appendix A - Troubleshooting Checklist 77

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, in-

ability to use the product, unauthorized replacement or alteration of components and prod-

uct specifications.

2. The warranty is void if the product has been subjected to physical abuse, improper instal-

lation, 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 service

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, contacts

or connections.

5. Avoid touching the pins or contacts on all modules and connectors. Hold modules or con-

nectors 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 system chassis cover for installation or servic-

ing. 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 com-

ponents. Perform the upgrade instruction procedures described at an ESD worksta-

tion 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 chas-

sis. If a wrist strap is unavailable, establish and maintain contact with the system

chassis throughout any procedures requiring ESD protection.

Before Using the System Board

Before using the system board, prepare basic system components.

If you are installing the system board in a new system, you will need at least the following

internal components.

• Storage devices such as hard disk drive, DVD-ROM, etc.

You will also need external system peripherals you intend to use which will normally include at

least a keyboard, a mouse and a video display monitor.

Chapter 1

Chapter 1 Introduction www.dﬁ .com

Chapter 1 - Introduction

Specifications

SYSTEM Processor 6th Generation Intel

Core

Processors, BGA 1356 (Skylake-U*)

Intel

Core

i7-6600U Processor, Dual Core, 4M Cache, 2.6GHz (3.4GHz), 15W

Intel

Core

i5-6300U Processor, Dual Core, 3M Cache, 2.4GHz (3.0GHz), 15W

Intel

Core

i3-6100U Processor, Dual Core, 3M Cache, 2.3GHz, 15W

Intel

Celeron

Processor 3955U, Dual Core, 2M Cache, 2.0GHz, 15W

Memory 4GB/8GB Memory Down Dual Channel DDR4 2133MHz

BIOS Insyde SPI 128Mbit

GRAPHICS Controller Intel

HD Graphics GT Series

Feature OpenGL 5.0, DirectX 12, OpenCL 2.1

HW Decode: AVC/H.264, MPEG2, VC1/WMV9, JPEG/MJPEG, HEVC/H265, VP8, VP9

HW Encode: AVC/H.264, MPEG2, JPEG, HEVC/H265, VP8, VP9

Display 1 x VGA

1 x DP++/HDMI (HDMI available upon request)

1 x LVDS/eDP (eDP available upon request)

VGA: resolution up to 1920x1200 @ 60Hz

DP++: resolution up to 4096x2304 @ 60Hz

HDMI: resolution up to 2560x1600 @ 60Hz or 4096x2160 @ 24Hz

LVDS: dual channel 48-bit, resolution up to 1920x1200 @ 60Hz

eDP: resolution up to 3840x2160 @ 60Hz

Triple

Displays

VGA +

DP++/HDMI (HDMI available upon request) +

LVDS/eDP (eDP available upon request)

EXPANSION Interface 1 x Full-size Mini PCIe (PCIe/USB)

1 x Half-size Mini PCIe (USB + PCIe/SATA, PCIe/SATA select by jumper setting,

SATA by default)

AUDIO Audio

Codec

Realtek ALC888S-VD2-GR

ETHERNET Controller 1 x Intel

I210AT PCIe (10/100/1000Mbps)

1 x Intel

I219LM PCIe with iAMT11.0 (10/100/1000Mbps)

(only Core i7/i5 supports iAMT)

Front I/O Serial 2 x RS-232/422/485; 1 x RS-232( also supports an optional 8-bit DIO)

Display 1 x VGA

Button 1 x Power Button

1 x Reset Button

Rear I/O Ethernet

2 x GbE (RJ-45)

Serial

1 x RS-232

USB

4 x USB 3.0

Audio

Mic-in; Line-out

Display 1 x DP++/HDMI

INTERNAL I/O Serial 2 x RS-232 (2.0mm pitch)

USB 2 x USB 2.0 (2.00mm pitch)

Display 1 x LVDS LCD Panel Connector

1 x LCD/Inverter Power

Supports optional eDP connector

Audio 1 x Audio (Line-out/Mic-in)

SATA 2 x SATA 3.0 (up to 6Gb/s)

1 x SATA Power

SMBus 1 x SMBus

Other I/O 1 x front panel; 1 x chassis intrusion; 1 x fan connector

WATCHDOG TIMER Output &

Interval

System Reset, Programmable via Software from 1 to 255 Seconds

SECURITY TPM Available Upon Request

POWER Type Single 12V +/-10% DC (SU251)

Wide Range 15~36V (SU253)

Connector 2-pin Terminal Block

Consumption SU251

Typical: 6600U:12V @ 0.45A (5.44Watt)

Max: 6600U:12V @ 3.14A (37.67Watt)

SU253

Typical: 6600U:19V @ 0.46A (8.7Watt)

Max: 6600U:19V @ 2.07A (39.29Watt)

RTC Battery CR2032 Coin Cell

OS SUPPORT Microsoft/

Linux

Windows 7 (/WES7) (32/64-bit)

Windows 8.1 (64-bit)

Windows 10 IoT Enterprise (64-bit)

Debian 8 (with VESA graphic driver)

CentOS 7 (with VESA graphic driver)

Ubuntu 15.10 (Intel graphic driver available)

ENVIRONMENT Temperature Operating: 0 to 60°C

Storage: -40 to 85°C

Humidity Operating: 5 to 90% RH

Storage: 5 to 90% RH

MTBF SU251: 369,377 hrs @ 25°C; 205,103 hrs @ 45°C; 123,607 hrs @ 60°C

SU253: 359,921 hrs @ 25°C; 199,960 hrs @ 45°C; 120,832 hrs @ 60°C

Calculation model: Telcordia Issue 2, Method I Case 3

Environment: GB, GC – Ground Benign, Controlled

MECHANICAL Dimensions 4" SBC Form Factor

165mm (6.49") x 115mm (4.53")

Height PCB: 1.6mm

Top Side: TBD, Bottom Side: TBD

* When Intel Skylake-U processors are used for stress test with the BurnInTest™ software, it may result in

CPU throttling. We provide a workaround for this situation. For more information, please contact our techni-

cal support at

http://www.dfi.com/support/support.html.

Chapter 1

Chapter 1 Introduction

Features

• 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 deliver increased system bandwidth and improved performance. The advantages of

DDR4 are its higher bandwidth and its increase in performance at a lower power than DDR3

and DDR3L. It is not compatible with older standards of DDR memories.

• Graphics

The integrated Intel

HD graphics engine delivers an excellent blend of graphics performance

and features to meet business needs. It provides excellent video and 3D graphics with out-

standing graphics responsiveness. These enhancements deliver the performance and compat-

ibility needed for today’s and tomorrow’s business applications. Supports 1 LVDS (or eDP), 1

DisplayPort (or HDMI) and 1 VGA interfaces for display outputs.

• 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

Two Intel

Gigabit LAN controllers (Intel

I210AT PCI Express Gigabit Ethernet controller and

Inte

l®

I219LM Gigabit Ethernet Phy) support up to 1Gbps data transmission.

• Audio

The Realtek ALC888S-VD2-GR audio codec provides 5.1-channel High Definition audio output.

• 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 3.0. It is capable of running at a maximum transmis-

sion speed of up to 5 Gbit/s (625 MB/s) and is faster than USB 2.0 (480 Mbit/s, or 60 MB/s)

and USB 1.1 (12Mb/s). USB 3.0 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.

Important:

The 5V_standby power source of your power supply must support ≥720mA.

• Wake-On-USB (optional)

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.

Important:

If you are using the Wake-On-USB Keyboard/Mouse function for 2 USB ports, the

5V_standby power source of your power supply must support ≥1.5A. For 3 or more

USB ports, the 5V_standby power source of your power supply must support ≥2A.

• 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.

Important:

The 5V standby power source of your power supply must support ≥720mA.

• RTC Timer

The RTC installed on the system board allows your system to automatically power-on on the

set date and time.

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Chapter 2 Hardware Installation

Chapter 2

Chapter 2 - Hardware Installation

Board Layout

Top View

Bottom View

333

Mini PCIe

DC-in

Reset

Power

CPU fan

Front

Panel

(JP11)

JP6

JP12

DDR4 DDR4

DDR4

COM 4

LAN 2

LAN 1

USB 2

USB 1

USB 3.0

USB 4

USB 3

COM 3

COM 2

COM 1

VGA

USB 3.0

SATA 3.0

USB 2.0 1/2

SPI Flash

BIOS

JP2

JP1

Battery

JP10

SMBus

JP7

JP9

JP8

Mini PCIe

MIC-inLINE-out

Front Audio

SATA 0

SATA 2

SATA Power

LVDS LCD Panel

COM 5

COM 6

Chassis

Intrusion

Realtek ALC888

Intel

WGI210AT

LCD/Inverter

Power

JP3

JP4

JP5

COM4/DIO Pin Select

Clear CMOS

eDP Panel

Voltage Select

eDP Invert

Voltage Select

Mini PCIe PCIe/

SATA Select

eDP Backlight

Voltage Select

(JP3)

(JP4)

(JP5)

(JP6)

(JP12)

Auto PWR ON

LVDS Backlight

Voltage Select

LVDS DIMM Control

LVDS Panel

Voltage Select

(JP1)

(JP2)

(JP7)

(JP8)

(JP9)

(JP10)

Intel

Nuvoton

NCT6106

Intel

WGI219LM

NXP

PIN3460

DDR4 DDR4 DDR4 DDR4

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Chapter 2 Hardware Installation

Chapter 2

Block Diagram

Core

i7/i5/i3

Super IO

with WDT

2GB/4GB DDR4

Memory Down

Channel A

Full-size

Mini PCIe

PCIe x1

USB 2.0

LPC Bus

eDP

PTN3460

LVDS

SMBus

SPI

Half-size

Mini PCIe

SATA 3.0

USB 2.0

GLAN I210AT

GLAN I219LM

PCIe x1

SATA 2x

RS-232/422/485 2x

RS-232 4x

H/W Monitor

PCIe x1

USB 2.0

USB 2.0 2x

HD Audio

Codec

Audio Jack

(Line-out/Mic-in)

SATA 3.0

USB 3.0

USB 2.0

USB 3.0 4x

2GB/4GB DDR4

Memory Down

Channel B

CH7517

DDI

VGA

R.G.B

DDI

DP++/HDMI

TPM (Opt.)

Mechanical Diagram

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Chapter 2 Hardware Installation

Chapter 2

System CPU

The system board is equipped with a Skylake-U microprocessor in socket BGA compatible

package 1356.

Installing the Heat Sink

The CPU must be kept cool by using a CPU fan with heat sink. Without sufficient air circula-

tion across the CPU and heat sink, 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 assem-

bly. 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 captive

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 CPU on

the system board.

2. Use the standoffs and captive

screws to fasten the heat sink on

the system board.

Captive screws

Standoffs

Mounting

holes

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Chapter 2 Hardware Installation

Chapter 2

Jumper Settings

Clear CMOS Data

If you encounter the following,

a) CMOS data becomes corrupted.

b) You forgot the supervisor or user password.

you can reconfigure the system with the default values stored in the ROM BIOS.

To load the default values stored in the ROM BIOS, please follow the steps below.

1. Power-off the system and unplug the power cord.

2. Set JP4 pins 2 and 3 to On. Wait for a few seconds and set JP4 back to its default setting,

pins 1 and 2 On.

3. Now plug the power cord and power-on the system.

2-3 On:

Clear CMOS Data

1-2 On:

Normal

JP4

System Memory

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 wear-

ing 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.

Important:

When the Standby Power LED lights red, it indicates that there is power on the sys-

tem board. Power-off the PC then unplug the power cord prior to installing any de-

vices. Failure to do so will cause severe damage to the motherboard and components.

• 4GB/8GB Memory Down

• Dual channel DDR4 2133MHz

Features

DDR4

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Chapter 2 Hardware Installation

Chapter 2

Auto Power-on Select

1-2 On:

Normal

2-3 On:

Auto-Power on

JP7 is used to select the method of powering on the system. If you want the system to pow-

er-on whenever AC power comes in, set JP7 pins 2 and 3 to On. If you want to use the power

button, set pins 1 and 2 to On.

When using the JP7 “Power On” feature to power the system back on after a power failure

occurs, the system may not power on if the power lost is resumed within 5 seconds (power

flicker).

JP7

Mini PCIe Signal Select

JP3 is used to select the Mini PCIe signal: PCIe or mSATA (default).

1-2 On: SATA

2-3 On: PCIe

JP3

312

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Chapter 2 Hardware Installation

Chapter 2

JP8

2-3 On:

+5V

Important:

Before powering-on the system, make sure that the power settings of JP8 match the

power specification of backlight control. Selecting the incorrect voltage will seriously

damage the backlight.

JP8 allows you to select the power level of the LVDS backlight brightness control: 3.3V or 5V.

LVDS Backlight Voltage Select

1-2 On:

+3.3V

JP9 allows you to select the mode for the lightness control of the LVDS panel.

LVDS DIMM Control

JP9

1-2 On:

DC Mode

2-3 On:

PWM Mode

Important:

You need to refer to your panel’s user guide to determine the type of mode most ap-

propriate for your panel.

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Chapter 2 Hardware Installation

Chapter 2

JP10

JP10 allows you to select the power voltage of the LVDS panel.

LVDS Panel Voltage Select

1-2 On: +12V

3-4 On:+5V

5-6 On: +3.3V

Important:

Before powering-on the system, make sure that the power settings of JP10 match the

power specification of LVDS panel’s specification. Selecting the incorrect voltage will

seriously damage the LVDS panel. .

1-2, 4-5, 7-8,

10-11 On:

COM4

12 1210 10

1133

2-3, 5-6, 8-9,

11-12 On:

DIO

COM4/DIO Pin Select

JP1

JP2

The system board uses JP1 and JP2 to select between RS232/422/485 COM 4 or isolated 8-bit

DIO at the rear panel.

Important:

You cannot use COM 4 and DIO at the same time. Please set up JP1 and JP2 together.

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Chapter 2 Hardware Installation

Chapter 2

eDP Backlight Voltage Select (optional)

JP5 is used to select the power level of backlight brightness control: +3.3V or +5V.

Important:

Before powering-on the system, make sure that the power settings of JP5 match the

power specification of backlight control. Selecting the incorrect voltage will seriously

damage the backlight.

1-2 On: +3.3V 2-3 On: +5V

JP5

3123

eDP Panel Voltage Select (optional)

JP6

1-2 On: +12V

3-4 On:+5V

5-6 On: +3.3V

JP6 is used to select the power supplied with the LCD panel.

Important:

Before powering-on the system, make sure that the power settings of JP6 match the

LCD panel’s specification. Selecting the incorrect voltage will seriously damage the

LCD panel.

5 5

4 4

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Chapter 2 Hardware Installation

Chapter 2

JP12

eDP Invert Voltage Select (optional)

JP12 is used to select the power level of the LCD/inverter power connector: +12V or +5V.

1-2 On: +12V 2-3 On: +5V

3123

Chapter 2 Hardware Installation

Chapter 2

Front Panel I/O Ports

The front panel I/O ports consist of the following:

•3 serial ports

- Two of them support RS232/422/485

- One (COM4) supports only RS232 with an optional 8-bit DIO

• 1 VGA port

• 1 power button

• 1 reset button

COM 1COM 2

COM 4

VGA

Reset

Button

Power

Button

Rear Panel I/O Ports

The rear panel I/O ports consist of the following:

• 2 RJ45 LAN ports

• 4 USB 3.0 ports

• 1 DP++/HDMI (opitoanl) port

• 1 serial port supporting RS232

• 1 Mic-in jack

• 1 Line-out jack

COM 3

DP++

LAN 1

LAN 2

USB 3.0 USB 3.0

Line-out

Mic-in

Chapter 2 Hardware Installation

Chapter 2

12V DC-in (SU251)/15~36V DC-in (SU253)

DC-in

This 2-pin terminal block provides maximum of 100W/120W power and is considered a low

power solution. Connect a DC power cord to this terminal block. Using a voltage more than

the recommended range may fail to boot the system or cause damage to the system board.

Graphics Interfaces

VGA Port

The VGA port is used for connecting a VGA monitor. Connect the monitor’s 15-pin D-shell cable

connector to the VGA port. After you plug the monitor’s cable connector into the VGA port,

gently tighten the cable screws to hold the connector in place.

DP Port

The DP port is a digital display interface used to connect a display device such as a computer

monitor. It is used to transmit audio and video simultaneously. The interface, which is devel-

oped by VESA, delivers higher performance features than any other digital interface.

HDMI Port (optional)

The HDMI port which carries both digital audio and video signals is used to connect a LCD

monitor or digital TV that has the HDMI port.

BIOS Setting

Configure the display devices in the Chipset menu (“North Bridge Configuration” submenu) of

the BIOS. Refer to the chapter 3 for more information.

The display ports consist of the following:

• 1 DP++/HDMI (optional) port

• 1 VGA port

DP++

VGA

Chapter 2 Hardware Installation

Chapter 2

USB Ports

The USB device allows data exchange between your computer and a wide range of simultane-

ously accessible external Plug and Play peripherals.

The system board is equipped with four onboard USB 3.0 port (USB 1-4). The 10-pin connec-

tor allows you to connect 2 additional USB 2.0 port (USB 1-2). The additional USB port may be

mounted on a card-edge bracket. Install the card-edge bracket to an available slot at the rear

of the system chassis and then insert the USB port cables to a connector.

BIOS Setting

Configure the onboard USB in the Advanced menu (“USB Configuration” submenu) of the

BIOS. Refer to chapter 3 for more information.

Driver Installation

You may need to install the proper drivers in your operating system to use the USB device.

Refer to chapter 4 for more information.

Wake-On-USB Keyboard/Mouse

The Wake-On-USB Keyboard/Mouse function allows you to use a USB keyboard or USB mouse

to wake up a system from the S3 (STR - Suspend To RAM) state.

Important:

If you are using the Wake-On-USB Keyboard/Mouse function for 2 USB ports, the

+5V_standby power source of your power supply must support ≥1.5A. For 3 or more

USB ports, the +5V_standby power source of your power supply must support ≥2A.

USB 1

USB 2

USB 3

USB 4

USB 1

USB 2

VCC

-Data0

+Data0

GND

Key

VCC

-Data1

+Data1

GND

N.C.

USB 2.0

USB 3.0

Chapter 2 Hardware Installation

Chapter 2

COM 5/COM 6: RS232

DCD-

GND

RTS-

RI-

DTR-

DSR-

CTS-

COM (Serial) Ports

The serial ports are asynchronous communication ports with 16C550A-compatible UARTs that

can be used with modems, serial printers, remote display terminals, and other serial devices.

BIOS Setting

Configure the serial ports in the Integrated Peripherals submenu (“NCT6106D Super I/O Con-

figuration” section) of the BIOS. Refer to chapter 3 for more information.

COM 2: RS232/RS422/RS485

COM 3: RS232

COM 1: RS232/RS422/RS485

COM 4 (or 8-bit DIO): RS232

COM 1 (RS232/422/485) /COM 2 (RS232/422/485) /COM3 (RS232 only)

RS232

RS422

Full Duplex

RS485

RTS-

RI-

DSR-

CTS-

6789

DCD-

TXD

RXD

DTR-

GND

2345

RX+

TX+

RX-

TX-

GND

12345

6789

N.C.

DATA+

DATA-

12345

GND

N.C.

6789

COM 4 (Serial) Port

This DB-9 serial port can be used as a RS232 COM port or as an isolated 8-bit DIO via the

jumper setting. Refer to “COM 4/DIO Select“ in this section for its respective configuration.

8-bit DIO (4-bit in and 4-bit out)

The 8-bit Digital I/O connector provides powering-on function to external devices that are con-

nected to the connector.

Pins

COM 4

Function

DIO Function

RS232

DCD DIN0A

RX DIN0B

TX DIN1A

DTR DIN1B

GND GND

DSR

DOUT0A

RTS

DOUT0B

CTS DOUT1A

RI DOUT1B

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DFI SU251/SU253 User manual

Brand: DFI

Model: SU251/SU253

Category: Motherboards

Type: User manual

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DFI SU251/SU253 User manual

DFI SU251/SU253 User manual

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