DFI COM331-B User manual

COM331-B
System Board
User’s Manual
A20700205

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 transfor-
mation/adaptation without the prior written permission from the copyright hold-
ers.
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.
© 2012. All Rights Reserved.
Trademarks
All trademarks and registered trademarks of products appearing in this manual
are the properties of their respective holders.

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 televi-
sion 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.

Table of Contents
Copyright...........................................................................................2
Trademarks........................................................................................2
FCC and DOC Statement on Class B..............................................3
About this Manual .............................................................................6
Warranty ..........................................................................................6
Static Electricity Precautions.............................................................7
Safety Measures.................................................................................7
About the Package ............................................................................8
Before Using the System Board........................................................8
Chapter 1 - Introduction ..................................................................9
Specifications..................................................................................9
Chapter 2 - Hardware Installation.................................................. 11
System Board Layout .................................................................... 11
Jumper Settings............................................................................. 12
USB Power Select..................................................................... 12
Panel Power Select................................................................... 13
Clear CMOS............................................................................. 14
Super IO Enable/ Disable.......................................................... 15
Backlight Power Select.............................................................. 16
VCC5_In Power Select .............................................................. 17
PCIe x16 Normal/ Reversed....................................................... 18
BIOS Select............................................................................. 19
FWH Write Protect.................................................................... 20
Function Test Jumper..................................................................... 21
Battery Low Test...................................................................... 21
Wake-up Test........................................................................... 22
Thermal Trigger ....................................................................... 23
Rear Panel I/O Ports..................................................................... 24
Serial (COM) Ports ................................................................... 25
VGA Port................................................................................. 26
RJ45 LAN Port ......................................................................... 27
Universal Serial Bus Connectors................................................. 28
Audio...................................................................................... 30

Internal I/O Connectors................................................................ 31
S/PDIF Connector..................................................................... 31
LVDS LCD Panel Connector and LCD/Inverter Power Connector...... 32
Digital I/O Connector................................................................ 34
LPC Connector......................................................................... 35
SATA (Serial ATA) Connectors.................................................... 36
Cooling Fan Connectors............................................................. 37
I2C Connector.......................................................................... 38
SM Bus................................................................................... 39
Power Connectors .................................................................... 40
Standby Power LED.................................................................. 41
Front Panel Connectors............................................................. 42
Expansion Slots ....................................................................... 43
Battery ................................................................................... 44
COM Express Connectors .......................................................... 45
Chassis Instrusion Connector..................................................... 49
Display Port............................................................................. 50
Express Card........................................................................... 51
SDIO...................................................................................... 52
Switches ................................................................................. 53
Serial Interface connector ......................................................... 54
Chapter 3 - Supported Software .................................................... 55

1
6
Introduction
About this Manual
An electronic file of this manual is included in the CD. To view the user’s manual
in the CD, insert the CD into a CD-ROM drive. The autorun screen (Main Board
Utility CD) will appear. Click “User’s Manual” on the main menu.
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 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 consequencial
damages to the product that has been modified or altered.

1
7
Introduction
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 dis-
charge can damage computer components without causing any signs of physical
damage. You must take extra care in handling them to ensure against electro-
static 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 compo-
nents, 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 instal-
lation or servicing. After installation or servicing, cover the system chassis
before plugging the power cord.
Battery:
• Danger of explosion if battery incorrectly replaced.
• Replace only with the same or equivalent type recommend by the manufac-
turer.
• Dispose of used batteries according to local ordinance.

1
8
Introduction
About the Package
The system board package contains the following items. If any of these items are
missing or damaged, please contact your dealer or sales representative for as-
sistance.
One COM331-B board
Two Serial ATA data cable
One COM port cable
One DVD
One I/O shield
One QR (Quick Reference)
Optional Items
Serial ATA data cable
Serial ATA power cable
USB port cable
COM port cable
 I/O shield
The system board and accessories in the package may not come similar to the
information listed above. This may differ in accordance to 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
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.
• A CPU
• Memory module
• Storage devices such as hard disk drive, CD-ROM, etc.
You will also need external system peripherals you intend to use which will nor-
mally include at least a keyboard, a mouse and a video display monitor.

1
9
Introduction
Chapter 1 - Introduction
Specifications
Audio
Storage
Digital I/O
Rear Panel I/O
Ports
I/O Connectors
Expension Slots
• Realtek ALC886 5.1-channel High Defi nition Audio
• Audio outputs: Mic-in/Center+Subwoofer,
line-in/surround and line out
• S/PDIF audio interface
• 4 Serial ATA ports
- 2 SATA 3.0 ports with data transfer rate up to 6Gb/s
- 2 SATA 2.0 ports with data transfer rate up to 3Gb/s
• 8-bit Digital I/O connector
- 4-bit GPI (General Purpose Input)
- 4-bit GPO (General Purpose Output)
• 1 DB-9 RS232 serial port
• 1 DB-15 VGA port
• 2 DisplayPort
• 1 RJ45 LAN port
• 4 USB 3.0 ports
• 4 USB 2.0 ports
• Line-in/Surround, Line out, Mic-in/Center+Subwoofer
jacks
• 1 connector for 1 external RS232 serial port
• 2 serial interface connectors
• 1 SDIO slot
• 1 DisplayPort
• 1 LVDS LCD panel connector
• 1 LCD/inverter power connector
• 1 8-bit Digital I/O connector
• 1 front audio connector for line-out and mic-in jacks
• 1 S/PDIF connector
• 4 Serial ATA ports
• 1 LPC connector
• 1 I2C connector
• 1 SMBus connector
• 1 24-pin ATX power connector
• 1 4-pin 12V power connector
• 1 chassis intrusion connector
• 1 front panel connector
• 3 fan connectors
• 1 PCIe x16 Gen 3 slot
• 1 PCIe x4 Gen 2 slot
• 2 PCIe x1 slots (PCIe 2.0)
• 1 Mini PCIe slot (PCIe 2.0) (PCIe signal only)
- USB signal: optional
• 1 ExpressCard slot (PCIe signal only)
- USB signal: optional

1
10
Introduction
COM EXPRESS
MODULES
Damage Free
Intelligence
ROM Interface
Temperature
Humidity
Power Input
Regulatory
PCB
• Basic
• Compact
• Legacy Super I/O support (option)
- Monitors 5V/1.5V/12V/3.3V
- Monitors SIO_Fan 1/SIO_Fan 2/System fan
• 1 SPI interface
- Supports up to 64Mbit
• 1 LPC/FWH interface
• Operating: 0oC to 60oC
• Storage: -20oC to 85oC
• 10% to 90%
• 12V, 5VSB, VCC_RTC (ATX mode)
12V, 5V, VCC_RTC (AT mode)
12V, VCC_RTC (AT mode)
• EMC: CE, FCC Part 15 Class B
• Dimensions
- microATX form factor
- 244mm (9.6”) x 244mm (9.6”)
• Compliance
- PICMG COM Express R2.0, Type 6