DFI WL551 Owner's manual

Brand: DFI

Model: WL551

Type: Owner's manual

WL551

A-598-M-2040

Preliminary

3.5" SBC Motherboard

User’s Manual

2User's Manual | WL551

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.

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 | WL551

Table of Contents

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

Specifications ......................................................................................................................... 6

WL551...............................................................................................................................6

Features .................................................................................................................................. 7

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

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

System Memory ..................................................................................................................... 9

Installing the Memory Module ........................................................................................9

Removing the Memory Module ....................................................................................10

Installing the Heat Sink .................................................................................................11

Jumper Settings ...................................................................................................................12

Clear CMOS (JP1) .........................................................................................................12

DIO PU/PD Select (JP3) ................................................................................................ 12

DIO Power Select (JP2) ................................................................................................13

Panel Backlight Selection (DPJP604) ..........................................................................14

Panel Inverter Power Selection (DPJP602) .................................................................14

Panel Power Selection (DPJP603) ...............................................................................15

InnoAGE Remote Management (JP6) ..........................................................................15

14 InnoAGE Remote Management .............................................................................15

Switch Settings .....................................................................................................................16

DIP Switch (SW1) ..........................................................................................................16

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

USB Ports ....................................................................................................................... 17

Graphics Display ............................................................................................................18

LAN .................................................................................................................................18

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

Front Audio .....................................................................................................................20

Digital I/O .......................................................................................................................20

Power Connector ...........................................................................................................21

COM1 .............................................................................................................................. 21

LVDS Panel ..................................................................................................................... 22

M.2 B Key 3042/2042 ...................................................................................................23

Expansion Slots .............................................................................................................23

M.2 E Key 2230 ..............................................................................................................23

Installing the M.2 Module .............................................................................................23

Installing the Mini PCIe Module ...................................................................................24

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

Battery Header ............................................................................................................... 27

Heater ............................................................................................................................. 27

SMBus ............................................................................................................................28

4User's Manual | WL551

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 | WL551

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 WL551 board

• 1 SATA cable (Length: 300mm) 332-553001-205G

• 1 SATA power cable (Length: 250mm) A81-004041-016G

• 1 COM cable (Length: 250mm) 332-753040-000G

• 1 USB 2.0 cable (Length: 200mm) A81-001032-016G

• 1 Audio cable (Length: 160mm) A81-022007-016G

• 1 Front Panel cable (Length: 250mm) A81-009307-001G

• 1 Heatsink (Hight: 32mm) A71-008152-000G

• 1 DVD 643-WL5511-000G

Note: The combination is subject to change at mass production.

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.

• Memory module

• Storage device

• 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.

Chapter 1

INTRODUCTION

User's Manual | WL551

Chapter 1 - Introduction

X Specifications

WL551

SYSTEM Processor 8th Generation Intel® Core™ Processors, BGA 1528

Intel® Core™ i7-8665UE, Quad Core, 8M Cache, 1.7GHz (4.4GHz), 15W

Intel® Core™ i5-8365UE, Quad Core, 6M Cache, 1.6GHz (4.1GHz), 15W

Intel® Core™ i3-8145UE, Dual Core, 4M Cache, 2.2GHz (3.9GHz), 15W

Intel® Core™ Celeron® 4305UE, Dual Core, 2M Cache, 2.0GHz (2.0GHz),

15W

Memory One 260-pin SODIMM up to 32GB

Single Channel DDR4 up to 2400MHz

BIOS AMI SPI 128Mbit

GRAPHICS Controller Intel® UHD Graphics 620/ Intel® UHD Graphics 610 (for Celeron 4305UE)

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

Display 1 x DP++/HDMI

1 x LVDS or 1 x eDP (opt.)

DP: resolution up to 4096*2160@60Hz

HDMI: resolution up to 3840*2160@30Hz

LVDS: resolution up to 1920x1200 @60Hz

eDP: resolution up to 3840x2160 @ 60Hz

Dual Displays 1x COMBO port (DP++/HDMI) + 1 x LVDS

1x COMBO port (DP++/HDMI) + 1 x eDP (opt.)

EXPANSION Interface 1 x M.2 M key 2280/2242 (PCIe x4/SATA 3.0)

1 x M.2 B key 3042/2242 (USB 3.1 Gen2/USB 2.0/SATA 3.0 or PCIe x1)

Support Nano SIM slot (opt.)

1 x M.2 E key 2230 (PCIe x2/USB 2.0)

Support Innodisk InnoAGE™ SSD

AUDIO Audio Codec Realtek ALC262-VC2-GR

ETHERNET Controller 3 x Intel® I211AT PCIe (10/100/1000Mbps) or

3 x Intel® I210IT PCIe (10/100/1000Mbps)

REAR I/O Ethernet 3 x GbE (RJ-45)

USB 4 x USB 3.1 Gen 2

Display 1 x COMBO port (DP++/HDMI)

INTERNAL I/O Serial 1 x RS-232/422/485 (2.00mm pitch)

RS485 support auto flow control

USB 2 x USB 2.0 (2.00mm pitch)

Display 1 x LVDS LCD Panel connector or 1 x eDP LCD panel connector

1 x LCD/Intverter Power

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

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 sec/min

SECURITY TPM fTPM2.0 (default)

dTPM2.0 (opt.)

POWER Type Single 12V +/-10% 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

Consumption TBD

OS SUPPORT

(UEFI Only)

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: 5 to 90% RH

Storage: 5 to 90% RH

MTBF TBD

MECHANICAL Dimensions 3.5" SBC Form Factor

146mm (5.75") x 102mm (4.02")

Height PCB: 1.6mm

Top Side: 15mm

Bottom Side: 4mm

CERTIFICATIONS CE, FCC, RoHS

Chapter 1

INTRODUCTION

User's Manual | WL551

X 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 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 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

outstanding graphics responsiveness. These enhancements deliver the performance and

compatibility needed for today’s and tomorrow’s business applications.

Gigabit LAN

The Gigabit Ethernet Controllers support data transmission at 1Gbps.

Audio

The audio codec provides 5.1 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

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 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.

Chapter 2

HARDWARE INSTALLATION

User's Manual | WL551

Chapter 2 - Hardware Installation

X Board 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.

Intel

BGA 1528

1 2

9 10

1 2

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Heater

12V DC-In

DDR4 SO-DIMM

CPU Fan

M.2 M Key LED

M.2 M Key

2242/2280

Battery

Clear CMOS

(JP1)

SATA Power

SATA

USB 7/8

(USB 2.0)

JP6

M.2 B Key

3042/2042

LVDS

LVDS Backlight

Panel Power

Select

Inverter Power

Select

Backlight Switch

& Voltage

Front Panel

Front Audio

Nano SIM

(Bottom Side)

M.2 E Key 2230

COM1

DIO

POWER

DIO

PU/PD

SMBus

LAN 1LAN 2LAN 3

USB 1/2USB 3/4

DP/HDMI

Heater LED

(Bottom Side)

CPU

(Bottom Side)

DIP switch

(SW1)

Chapter 2

HARDWARE INSTALLATION

User's Manual | WL551

X System Memory

The system board supports the following memory interface.

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 socket on the system board

4. Make sure the notch on memory card is aligned to the key on the socket.

Socket Side View

Socket Top View

Memory Module

Notch

Key

Eject TabEject Tab

Step 3

Step 2

Step 1 Step 1

Step 2

Step 3

Socket Side View

Socket Top View

Memory Module

Key

Eject TabEject Tab

Step 3

Step 2

Step 1

Step 2

Step 3

Notch

Retention Notch

X System Memory

Installing the Memory Module

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DDR4_1

Chapter 2

HARDWARE INSTALLATION

User's Manual | WL551

Please follow the steps below to install the memory card into the socket.

Step 1:

Press the eject tabs at both ends of the socket outward and downward to release them from

the locked position.

Step 2:

Insert the memory card into the slot while making sure the notch and the key are aligned.

Press the card down firmly with fingers while applying and maintaining even pressure on both

ends.

Step 3:

The tabs snap automatically to the edges of the card and lock the card in place.

Socket Side View

Socket Top View

Memory Module

Notch

Key

Eject TabEject Tab

Step 3

Step 2

Step 1

Step 2

Step 3

Socket Side View

Socket Top View

Memory Module

Key

Eject TabEject Tab

Step 3

Step 2

Step 1

Step 2

Step 3

Notch

Retention Notch

X System Memory X Installing the Memory Module

Socket Side View

Socket Top View

Memory Module

Notch

Key

Eject TabEject Tab

Step 3

Step 2

Step 1

Step 2

Step 3

Socket Side View

Socket Top View

Memory Module

Key

Eject TabEject Tab

Step 3

Step 2

Step 1

Step 2

Step 3

Notch

Retention Notch

Please follow the steps below to remove the memory card from the socket.

Step 1:

Press the eject tabs at both ends of the socket outward and downward to release them from

the locked position.

Step 2:

The memory card ejects from the slot automatically.

Step 3:

Hold the card by its edges and remove it from the slot.

X System Memory

Removing the Memory Module

Chapter 2

HARDWARE INSTALLATION

User's Manual | WL551

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.

X CPU

Mounting holes

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Chapter 2

HARDWARE INSTALLATION

User's Manual | WL551

X Jumper Settings

Clear CMOS (JP1)

If any anomaly of the followings is encountered —

a) CMOS data is corrupted;

b) you forgot the supervisor or user password;

c) failure to start the system due to BIOS mis-configuration

— it is suggested that the system be reconfigured with 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. Put a jumper cap on JP5’s pin 2 and pin 3. Wait for a few seconds and set JP5 back to

its default setting, i.e. jumper cap on pin 1 and pin 2.

3. Plug the power cord and power-on the system.

Intel

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DIO PU/PD Select (JP3)

X Jumper Settings

Intel

BGA 1528

1 2

9 10

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1-2 On:

Normal (default)

31 2

2-3 On:

Clear CMOS

31 2

1-3 On: DIO Power (DIO4-7)

2-4 On: DIO Power (DIO0-3)

3-5 On: GND (DIO4-7)

4-6 On: GND (DIO0-3)

To switch DIO PU/PD type.

Chapter 2

HARDWARE INSTALLATION

User's Manual | WL551

DIO Power Select (JP2)

X Jumper Settings

Intel

BGA 1528

1 2

9 10

1 2

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234

JP2 is used to select the power of DIO (Digital I/O) signal.

2-3 On: 5V

1-2 On:

5VSB (default)

31 2 31 2

Chapter 2

HARDWARE INSTALLATION

User's Manual | WL551

Panel Backlight Selection (DPJP604)

X Jumper Settings

Intel

BGA 1528

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9 10

1 2

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234

DPJP604 is used to select the panel backlight power.

1-2 On:

3V3 (default)

31 2 31 2

2-3 On:

Panel Inverter Power Selection (DPJP602)

X Jumper Settings

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BGA 1528

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9 10

1 2

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DPJP602 is used to select the panel inverter power.

1-2 On:

+12V (default)

31 2 31 2

2-3 On:

Chapter 2

HARDWARE INSTALLATION

User's Manual | WL551

Panel Power Selection (DPJP603)

X Jumper Settings

Intel

BGA 1528

1 2

9 10

1 2

3940

234

DPJP603 is used to select the panel power.

1-2 On:

+12V (default)

3-4 On:

+5V

6 5

5-6 On:

+3.3V

6 5

InnoAGE Remote Management (JP6)

X Jumper Settings

Intel

BGA 1528

1 2

9 10

1 2

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JP6 is used to configure the InnoAGE Remote Management.

14 InnoAGE Remote Management

Pin Assignment Pin Assignment

1 PC Reset 2 Recovery

3 Power LED 4 HDD LED

5 Power Button 6 GND

Chapter 2

HARDWARE INSTALLATION

User's Manual | WL551

X Switch Settings

DIP Switch (SW1)

Intel

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1 2

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SKUs M.2 E-Key M.2 B-Key M.2 M-Key SATA_5V

000G~800G SW1 1-8 ON 2-7 ON 3-6 ON 4-5 ON

+3V3SB +3V3SB +3V3SB +5VSB

900G SW2 1-8 OFF 2-7 OFF 3-6 OFF 4-5 OFF

+3.3V +3.3V +3.3V +5V

Chapter 2

HARDWARE INSTALLATION

User's Manual | WL551

X Rear I/O Ports

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

• 1 HDMI / DP++ port

• 3 RJ45 LAN ports

• 4 USB 3.1 Gen4 ports

Rear

USB Ports

USB allows data exchange between your computer and a wide range of simultaneously

accessible external Plug and Play peripherals.

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.

X Rear I/O Ports

Intel

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9 10

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 DP++/HDMI

 LAN 2

 USB 3.1 Gen 1

 LAN 1  LAN 3

 DP++/HDMI

 LAN 2

 USB 3.1 Gen 1

 LAN 1  LAN 3

Chapter 2

HARDWARE INSTALLATION

User's Manual | WL551

Graphics Display

DisplayPort ++

The DisplayPort (DP) 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 developed by VESA, delivers higher performance features than any other digital interface.

DP++ is supported by the system board for converting to DVI and HDMI signals.

HDMI

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.

X Rear I/O Ports

Intel

BGA 1528

1 2

9 10

1 2

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 DP++/HDMI

 LAN 2

 USB 3.1 Gen 1

 LAN 1  LAN 3

LAN

LAN1/LAN2/LAN3 (RJ45)

The onboard RJ45 LAN port allows the system board to connect to a local area network by

means of a network hub.

X Rear I/O Ports

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1 2

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 DP++/HDMI

 LAN 2

 USB 3.1 Gen 1

 LAN 1  LAN 3

Chapter 2

HARDWARE INSTALLATION

User's Manual | WL551

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

simultaneously accessible external Plug and Play peripherals.

The internal USB pin headers may be connected to 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.

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 the system from the S state(s).

USB Ports

X Internal I/O Connectors

 USB 7/8

(USB 2.0)

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Pin Assignment Pin Assignment

1 VCC 2 VCC

3 -DATA 4 -DATA

5 +DATA 6 +DATA

7 GND 8 GND

9 Key 10 N.C.

 USB2.0 Pin Assignment

Chapter 2

HARDWARE INSTALLATION

User's Manual | WL551

X Internal I/O Connectors

Front Audio

The Front Audio internal connector allows you to connect to the second line-out and mic-in

jacks that are at the front panel of your system.

Pin Assignment Pin Assignment

1 Mic-L 2 GND

3 Mic-R 4 N.C.

5 Line-Out-R 6 Mic-JD (sense)

7 GND 8 N.C.

9 Line-Out-L 10 Line-JD (sense)

 Front Audio Pin Assignment

The Digital I/O (DIO) connector allows for input/output signals of digital logical states defined

by voltage levels.

Pin Assignment Pin Assignment

1 DIO_7 2 DIO_6

3 DIO_5 4 DIO_4

5 DIO_3 6 DIO_2

7 DIO_1 8 DIO_0

9 DIO Power 10 GND

 Digital I/O Pin Assignment

Digital I/O

X Internal I/O Connectors

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DFI WL551 Owner's manual

DFI WL551 Owner's manual

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