No part of this document may be reproduced, transmitted, transcribed, stored in a
retrieval system, or translated into any language, in any form or by any means, electronic,
mechanical, magnetic, optical, chemical, manual or otherwise without the prior written
permission of VIA Technologies, Incorporated.
All trademarks are the property of their respective holders.
PS/2 is a registered trademark of IBM Corporation.
Disclaimer
No license is granted, implied or otherwise, under any patent or patent rights of VIA
Technologies. VIA Technologies makes no warranties, implied or otherwise, in regard to
this document and to the products described in this document. The information provided
in this document is believed to be accurate and reliable as of the publication date of this
document. However, VIA Technologies assumes no responsibility for the use or misuse of
the information in this document and for any patent infringements that may arise from the
use of this document. The information and product specifications within this document are
subject to change at any time, without notice and without obligation to notify any person
of such change.
Regulatory Compliance
FCC-A Radio Frequency Interference Statement
This equipment has been tested and found to comply with the limits for a class A 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
commercial environment. 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. Operation of this equipment in a
residential area is likely to cause harmful interference, in which case the user will be
required to correct the interference at his personal expense.
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.
Notice 2
Shielded interface cables and A.C. power cord, if any, must be used in order to comply
with the emission limits.
Tested To Comply
With FCC Standards
FOR HOME OR OFFICE USE
Battery Recycling and Disposal
Only use the appropriate battery specified for this product.
Do not re-use, recharge, or reheat an old battery.
Do not attempt to force open the battery.
Do not discard used batteries with regular trash.
Discard used batteries according to local regulations.
II
Safety Precautions
Do’s
o Always read the safety instructions carefully.
o Keep this User's Manual for future reference.
o All cautions and warnings on the equipment should be
noted.
o Keep this equipment away from humidity.
o Lay this equipment on a reliable flat surface before setting
it up.
oMake sure the voltage of the power source and adjust
properly 110/220V before connecting the equipment to the
power inlet.
oPlace the power cord in such a way that people cannot
step on it.
oAlways unplug the power cord before inserting any add-on
card or module.
oIf any of the following situations arises, get the equipment
checked by authorized service personnel:
o The power cord or plug is damaged.
o Liquid has penetrated into the equipment.
o The equipment has been exposed to moisture.
o The equipment has not worked well or you cannot
get it work according to User's Manual.
o The equipment has dropped and damaged.
o The equipment has obvious sign of breakage.
Don’ts
oDo not leave this equipment in an environment
unconditioned or in a storage temperature above 70°C
(158°F). The equipment may be damaged.
o Do not leave this equipment in direct sunlight.
o Never pour any liquid into the opening. Liquid can cause
damage or electrical shock.
o Do not place anything over the power cord.
o Do not cover the ventilation holes. The openings on the
Getting Started ..............................................................................................72
Running the Driver Utilities CD .............................................................72
CD Content ..........................................................................................................73
IX
1
Product Overview
1
The VIA EPIA-P720 is an ultra-compact and highly integrated PicoITX mainboard and the smallest stand-alone form-factor available
today. Through a high level of integration, the Pico-ITX form factor
is 75% smaller than the existing Mini-ITX form factor. The
mainboard enables the creation of an exciting new generation of
small, ergonomic, innovative and affordable embedded systems.
The VIA EPIA-P720 Pico-ITX mainboard is rich in I/O integration
and comes with an integrated VIA Eden ULV 1.0GHz NanoBGA2
processor, boasting of ultra-low power consumption and cool
operation.
KEY COMPONENTS
VIA Eden ULV 1.0GHz NanoBGA2 Processor
Due to its ultra cool, ultra quiet, and reliable performance, the VIA
Eden ULV 1.0GHz NanoBGA2 processor is a perfect fit for thin
client, set top boxes, silent desktop. With a maximum power
envelope of 3.5W, the VIA Eden ULV 1.0GHz NanoBGA2
processor offers impressive power efficiency and highly effective
heat dissipation all within an ultra compact NanoBGA2 package
measuring just 21mm x 21mm. When combined with the most
recent VIA VX855 Media System Processor (MSP), which have
been designed as companion sets for the latest VIA processors,
system developers can utilize an impressive range of features for a
wide range of desktop and embedded applications.
VIA VX855 Media System Processor
The VIA VX855 MSP integrates a premium graphics engine, an
HD audio controller, a DDR2 memory controller, a 400MHz FSB
processor interface, and extensive I/O capabilities support in a
single chip design. Complementing the power-efficient VIA Eden
ULV 1.0GHz NanoBGA2 processor, the VX855 is based on a
highly sophisticated power efficient architecture that enables such
rich integration into a compact package with a maximum power
envelope of just 2.3 W.
2
MAINBOARD SPECIFICATIONS
CPU
Chipset
Graphics
System Memory
Onboard Storage
Audio
LAN
Onboard I/O
Connectors
I/O Ports
System Monitoring
and Management
BIOS
Operating System
Operating
Environment
Compliance
Dimensions
Form Factor
VIA Eden ULV 1.0 GHz NanoBGA2 processor
• NanoBGA2 package
• 400 MHz Front Side Bus
VIA VX855 All-in-One System Processor
Integrated VIA Chrome9TM HCM DX9 with MPEG-2/4
Accelerators
One DDR2 800/667 SODIMM slot (up to 2 GB)
One UltraDMA 133/100/66/33 44-pin IDE connector
One SATA 3Gb/s connector
VIA VT1708B High Definition Audio Codec
One VIA VT6122 Gigabit Ethernet controller
One Audio pin connector for Line-out, Line-in and Mic-in
One Single-channel LVDS connector (5V/3V)
One LPC pin connector
One SMBus pin connector
One DIO pin connector(4 GPI & 4 GPO)
Two UART port / VCP pin header
One CPU fan connector
One PS2 mouse/keyboard pin header
One USB pin header
One Front panel pin header
One Backlight control pin header
One SATA power connector
One +12V DC-in 2-pin connector
One HDMI port
One VGA port
One GigaLAN port
Two USB ports
Wake-On-LAN and Keyboard Power-on
RTC Timer
Watch Dog Timer
System power management, AC power failure
AMI BIOS with 4Mbit LPC flash memory
Windows XP/CE/XPe and Linux
Temperature: 0°C up to 60°C
LVDS1 1-CH LVDS Panel connector J2 VCP/UART port 1
Description Symbol
DescriptionDescription
Symbol Description
SymbolSymbol
Description
DescriptionDescription
5
P720-AI/OMODULE LAYOUT
The VIA EPIA-P720 Pico-ITX mainboard is bundled with an I/O
board (P720-A) to support connections to LAN, VGA and USB.
Front View
Top View
Bottom View
Symbol
Symbol Description
SymbolSymbol
VGA1 VGA port
USB1 USB 2.0 port 1
USB2 USB 2.0 port 2
RJ1 RJ-45 LAN port
CON1 VGA & USB board-to-board connector
CON2 LAN board-to-board connector
Description
DescriptionDescription
6
DEVELOPMENT KIT ACCESSORIES
DC-In Cable
The DC-In power cable provides a means to connect to the power
brick.
Power Brick
The power brick provides a regulated 12V/15A output to power
up the EPIA-P720 mainboard.
Note:
Note:
Note:Note:
The Power brick is not included in the package of EPIA-P720
and this item should be purchased separately.
7
8
2
Onboard
Connectors, Slots
This chapter provides you with information about hardware
installation procedures. It is recommended to use a grounded
wrist strap before handling computer components. Electrostatic
discharge (ESD) can damage some components.
and Pin Headers
9
TOP SIDE CONNECTORS
VIA Eden ULV 1.0GHz with a Fanless Heatsink
The VIA EPIA-P720 Pico-ITX mainboard is packaged with a
standard VIA Eden ULV 1.0GHz NanoBGA2 processor. The
processor does not require a heatsink with fan because of it highly
power efficient and ultra cool performance.
System Fan connector: FAN1
FAN1 runs on +5V and maintains system cooling. When
connecting the cable to the connector, always be aware that the
red wire (positive wire) should be connected to the +5V pin. The
black wire is the ground wire and should always be connected to
GND.
Pin Signal
1 FAN_MCM
2 GND
10
DC-In Power connector: PWR1
EPIA-P720 has an onboard DC-In 2-pin power connector to
connect the DC-In power cable.
Pin Signal
1 DC In (+12V)
2 GND
Serial ATA Power connector: PWR2
The mainboard supports a 3-pin SATA power connector for SATA
power cable. Plug the SATA power cable into the SATA power
connector. Make sure the power plug is inserted in the proper
orientation and pins are aligned.
Pin Signal
1 +5V
2 +12V
3 GND
11
Serial ATA connector: SATA1
The current SATA interface allows a data transfer rate of up to 300
MB/s — approximately 225% faster than Ultra DMA parallel ATA.
HDMI port connector: HDMI1
The mainboard has a High Definition Multimedia Interface (HDMI)
port for connecting to high definition video and digital audio. The
HDMI port allows you to connect digital video devices which
utilize a high definition video signal. The HDMI port is HDMI 1.3
and HDCP 1.2 compatible.
12
IDE pin header: IDE1
The mainboard has an Ultra DMA 133/100 controller. You can
connect up to two IDE devices in any combination.
Step 1Step 1
Locate the SODIMM slot in the mainboard and align the
notch on the SODIMM with the memory slot.
Step
Step 2222
Step Step
Insert the SODIMM module at a 45 degree angle. Then
push the SODIMM down until it snaps into the locking
mechanism.
25
26
3
Onboard Jumpers
27
Clear CMOS jumper: JM1
The onboard CMOS RAM stores system configuration data and has
an onboard battery power supply. To reset the CMOS settings, set
the jumper on pins 2 and 3 while the system is off. Return the
jumper to pins 1 and 2 afterwards. Setting the jumper while the
system is on will damage the mainboard. The default setting is on
pins 1 and 2.
Setting 1 2 3
Normal Operation (default) ON ON OFF
Clear CMOS setting OFF ON ON
Caution:
Caution:
Caution:Caution:
Except when clearing the RTC RAM, never remove the cap from
the CLEAR_CMOS jumper default position. Removing the cap
will cause system boot failure. Avoid clearing the CMOS while
the system is on; it will damage the mainboard.
28
LCD Panel Power Selector: JM2
This jumper determines the input voltage for the LCD connector.
Setting 1 2 3
+5V ON ON OFF
+3.3V OFF ON ON
LCD Backlight Power Selector: JM3
This jumper determines the input voltage for the LCD backlight
inverter.
Setting 1 2 3
+12V ON ON OFF
+5V OFF ON ON
29
30
4
P720-A I/O
Module Installation
31
P720-AINSTALLATION PROCEDURE
Step 1
Step 1
Step 1Step 1
Align and mount the P720-A board.
Step 2
Step 2
Step 2Step 2
Align the CON1 (VGA & USB board-to-board connector) and
CON2 (LAN board-to-board connector) of P720-A I/O module
board with the CN3 and VGA_USB1 pin headers to the top side
of EPIA-P720 mainboard respectively.
32
Step 3
Step 3
Step 3Step 3
Then gently press down until the pins on the EPIA-P720
mainboard have been fully inserted into the CON1 and CON2
connectors of the P720-A I/O module board.
Step 4
Step 4
Step 4Step 4
Secure the EPIA-P720-A I/O module with two screws.
33
34
5
BIOS Setup
This chapter gives a detailed explanation of the BIOS setup
functions.
35
ENTERING THE BIOSSETUP MENU
Power on the computer and press <Delete
of the boot sequence to enter the BIOS setup menu. If you missed
the BIOS setup entry point, restart the system and try again.
Delete> during the beginning
DeleteDelete
CONTROL KEYS
Keys Description
Up Move to the previous item
Down Move to the next item
Left Move to the previous tab
Right Move to the next tab
Enter Select the item
Esc Jumps to the Exit menu or returns to the main menu
+ (number pad) Increase the numeric value
- (number pad) Decrease the numeric value
F1 General help, only for Status Page Setup Menu and
F7 Discard Changes
F9 Load Optimized defaults
F10 Save all the changes and exit
from a submenu
Option Page Setup Menu
36
GETTING HELP
The BIOS setup program provides a “General Help
can display this screen from any menu/sub-menu by pressing
<F1
F1>. The help screen displays the keys for using and navigating
F1F1
the BIOS setup. Press <Esc
Esc> to exit the help screen.
EscEsc
General Help” screen. You
General HelpGeneral Help
37
MAIN MENU
AMIBIOS
BIOS version number and related information.
Processor
CPU information.
System Memory
Memory size.
System Time
Use the key “+” or “-” to configure system time. The time format is
[Hour : Minute : Second].
System Date
Use the key “+” or “-” to configure system Date. The date format is
[Day, Month, Date, Year].
38
ADVANCED SETTINGS
CPU Configuration
IDE Configuration
ACPI Configuration
APM Configuration
Spread Spectrum Configuration
USB Configuration
39
CPUCONFIGURATION
CMPXCHG8B instruction support
Settings: [Enabled, Disabled]
40
IDECONFIGURATION
Parallel ATA IDE Controller
Settings: [Disabled, Primary]
Hard Disk Write Protect
Settings: [Disabled, Enabled]
IDE Detect Time Out (Sec)
Settings: [0, 5, 10, 15, 20, 25, 30, 35]
ATA(PI) 80Pin Cable Detection
Settings: [Host & Device, Host, Device]
41
IDEDRIVES
Primary IDE Master
Primary IDE Slave (SATA Device)
Type
Settings: [Not Installed, Auto, CD/DVD, ARMD]
LBA/Large Mode
Settings: [Disabled, Auto]
42
Block (Multi-Sector Transfer)
Settings: [Disabled, Auto]
PIO Mode
Settings: [Auto, 0, 1, 2, 3, 4]
DMA Mode
Settings: [Auto]
S.M.A.R.T.
Self Monitoring Analysis and Reporting Technology, a monitoring
system for hard disks.
Settings: [Auto, Disabled, Enabled]
32Bit Data Transfer
Settings: [Enabled, Disabled]
43
ACPISETTINGS
General ACPI Configuration
This menu contains ACPI (Advanced Configuration and Power
Management Interface) options.
Advanced ACPI Configuration
Chipset ACPI Configuration
44
GENERAL ACPICONFIGURATION
Suspend Mode
Select the ACPI state used for system suspend.
Settings Description
S1(POS) S1/Power On Suspend (POS) is a low power state. In this
state, no system context (CPU or chipset) is lost and
hardware maintains all system contexts
S3(STR) S3/Suspend To RAM (STR) is a power-down state. In this
state, power is supplied only to essential components
such as main memory and wakeup-capable devices. The
system context is saved to main memory, and context is
restored from the memory when a "wakeup" event
occurs.
Auto Depends on the OS to select the state.
Repost Video on S3 Resume
To determine whether to invoke VGA BIOS post on S3/STR
resume or not.
Settings: [No, Yes]
45
ADVANCED ACPICONFIGURATION
ACPI Version Features
To enable RSDP pointers to 64-bit Fixed System Description Tables.
Settings: [ACPI v1.0, ACPI v2.0, ACPI v3.0]
ACPI APIC Support
To include ACPI APIC table pointer to RSDT pointer list.
Settings: [Enabled, Disabled]
AMI OEMB Table
To include OEMB table pointer to R(X)SDT pointer lists.
Settings: [Disabled, Enabled]
Headless Mode
To enable or disable headless operation mode through ACPI.
Settings: [Disabled, Enabled]
46
CHIPSET ACPICONFIGURATION
USB Device Wakeup Function
Settings: [Disabled, Enabled]
47
APMCONFIGURATION
Power Management / APM
Settings: [Disabled, Enabled]
Power Button Mode
Settings: [On/Off, Standby, Suspend]
Suspend Power Saving Type
Settings: [C3, S1]
Restore on AC / Power Loss
The field defines how the system will respond after an AC power
loss during system operation.
Settings Description
Power Off Keeps the system in an off state until the power button is
Power On Restarts the system when the power is back
Last State Save in last state
Enables or disables the monitoring of the specified IRQ line.
Settings: [Ignore, Monitor]
Note:
Note:
Note:Note:
IRQ (Interrupt Request) lines are system resources allocated to
I/O devices. When an I/O device needs to gain attention of the
operating system, it signals this by causing an IRQ to occur.
After receiving the signal, when the operating system is ready,
the system will interrupt itself and perform the service required
by the IO device.
49
Resume on Ring
Settings: [Disabled, Enabled]
Resume on PME#
Settings: [Disabled, Enabled]
Resume On PS/2 KBC
Settings: [Disabled, S3, S3/S4/S5]
Wake-up Key
Settings: [Any Key, Specific Key]
Resume on PS/2 Mouse
Enable any mouse activity to restore the system from the power
saving mode to an active state.
Settings: [Disabled, S3, S3/S4/S5]
Resume on RTC Alarm
Set a scheduled time and/or date to automatically power on the
system.
Settings: [Disabled, Enabled]
To enable USB 1.1 host controllers.
Settings: [Disabled, USB 2 ports, USB 4 ports, USB 6 ports]
USB 2.0 Ports Enable
To enable USB 2.0 host controllers.
Settings: [Disabled, Enabled]
USB Device Mode Enable
Settings: [Enabled, Disabled]
Legacy USB Support
To enable support for legacy USB.
Settings: [Disabled, Enabled, Auto]
USB 2.0 Controller Mode
To configure the USB 2.0 controller in HiSpeed (480Mbps) or
FullSpeed (12Mbps).
Settings: [FullSpeed, HiSpeed]
BIOS EHCI Hand-Off
Settings: [Disabled, Enabled]
52
ADVANCED PCI/PNPSETTINGS
Note:
Note:
Note:Note:
This section covers some very technical items and it is strongly
recommended to leave the default settings as it is unless you
are an experienced user.
Clear NVRAM
To clear NVRAM during system boot.
Settings: [No, Yes]
Plug & Play O/S
Settings: [No, Yes]
PCI Latency Timer
Value in units of PCI clocks for PCI device latency timer register.
Settings: [32, 64, 96, 128, 160, 192, 224, 248]
To decide the size of memory block to reserve for legacy ISA
devices.
Settings: [Disabled, 16k, 32k, 64k]
54
BOOT SETTINGS
Boot Settings Configuration
Configuration settings during system boot.
Boot Device Priority
Specifies the boot device priority sequence.
55
BOOT SETTINGS CONFIGURATION
Quick Boot
Settings: [Disabled, Enabled]
Display Logo
Settings: [Disabled, Enabled]
AddOn ROM Display Mode
Settings: [Force BIOS, Keep Current]
Bootup Num-Lock
To select power-on state for Num-Lock.
Settings: [Off, On]
PS/2 Mouse Support
Settings: [Disabled, Enabled, Auto]
Wait For ‘F1’ If Error
Settings: [Disabled, Enabled]
Hit ‘DEL’ Message Display
Settings: [Disabled, Enabled]
56
Interrupt 19 Capture
Settings: [Disabled, Enabled]
57
BOOT DEVICE PRIORITY
1st Boot Device
To specifies the boot sequence from the available devices. The
available boot devices are detected dynamically according to real
situation and variable options will be provided.
Settings: [Network: VIA Networking Bootagent, Disabled]
58
SECURITY SETTINGS
Change Supervisor Password
This option is for setting a password for entering BIOS Setup.
When a password has been set, a password prompt will be
displayed whenever BIOS Setup is run. This prevents an
unauthorized person from changing any part of your system
configuration.
When a supervisor password is used, the BIOS Setup program can
be accessed and the BIOS settings can be changed.
Change User Password
When a user password is used, the BIOS Setup program can be
accessed but the BIOS settings cannot be changed.
Boot Sector Virus Protection
Settings: [Disabled, Enabled]
59
ADVANCED CHIPSET SETTINGS
Caution:
Caution:
Caution: Caution:
The Advanced Chipset Features menu is used for optimizing the
chipset functions. Do not change these settings unless you are
familiar with the chipset.
North Bridge VIA VX855 Configuration
South Bridge VIA VX855 Configuration
60
NORTH BRIDGE VIAVX855
CONFIGURATION
Software Reset E2 Issue
Settings: [Patch, Escape Patch]
Change DCLK using RDCKM
Settings: [Program, Escape Program]
Dynamic CKE
Settings: [Disabled, Enabled]
NB Performance Register
Settings: [Disabled, Enabled]
NB Energy Saving Register
Settings: [Disabled, Enabled]
61
DRAMFREQUENCY/TIMING
CONFIGURATION
Burst Length
Settings: [4, 8, Auto]
Channel Mode Select
Settings: [Channel A Only, Channel A and Channel B, Channel A
and Channel C]
Exit system setup after saving the changes, or press “F10”.
Discard Changes and Exit
Exit system setup without saving any changes, or press “Esc”.
Discard Changes
Discard changes which have been done so far to any of the setup
questions, or press “F7”.
Load Optimal Defaults
Load optimal default values for all the setup items, or press “F9”.
The default optimized values are set by the mainboard
manufacturer to provide a stable system with optimized
performance.
69
70
6
Driver Installation
This chapter gives you brief descriptions of each mainboard driver
and application. You must install the VIA chipset drivers first before
installing other drivers such as VGA drivers. The applications will
only function correctly if the necessary drivers are already installed.
71
DRIVER UTILITIES
Getting Started
The VIA EPIA-P720 includes a driver CD that contains the drivers
and software for enhancing the performance of the system. The
drivers can also be downloaded from http://www.via.com.tw.
Note:
Note:
Note: Note:
The driver utilities and software are updated from time to time.
The latest updated versions are available at
http://www.via.com.tw
Running the Driver Utilities CD
To start using the CD, insert the CD into the CD-ROM or DVDROM drive. The CD should run automatically after closing the CDROM or DVD-ROM drive. The driver utilities and software menu
screen should then appear on the screen. If the CD does not run
automatically, click on the “Start” button and select “Run…” Then
type: "D:\Setup.exe".
For Linux drivers, click the right button on mouse and click open.
Linux drivers located in the “Driver” folder.
Note:
Note:
Note: Note:
D: might not be the drive letter of the CD-ROM/DVD-ROM in
your system.
72
CDCONTENT
VIA
VIA 4 in 1 Drivers
4 in 1 Drivers
VIA VIA
4 in 1 Drivers4 in 1 Drivers
Contains VIA ATAPI Vendor Support Driver (enables the
performance enhancing bus mastering functions on ATAcapable Hard Disk Drives and ensures IDE device
compatibility), AGP VxD Driver (provides service routines
to your VGA driver and interface directly to hardware,
providing fast graphical access), IRQ Routing Miniport
Driver (sets the system's PCI IRQ routing sequence) and
VIA INF Driver (enables the VIA Power Management
function).
Includes V-RAID and RAID tools.
VIA Graphics Driver
VIA Graphics Driver
VIA Graphics DriverVIA Graphics Driver
Enhances the onboard VIA graphic chip.
Windows XP and Linux drivers are provided.
VIA Audio Driver
VIA Audio Driver
VIA Audio DriverVIA Audio Driver
Enables access to the onboard VIA HD audio codec.
VIA USB 2.0 Driver
VIA USB 2.0 Driver
VIA USB 2.0 DriverVIA USB 2.0 Driver
Enhances VIA USB 2.0 ports.
VIA LAN Driver
VIA LAN Driver
VIA LAN DriverVIA LAN Driver
VIA GigaLAN Driver
VIA GigaLAN Driver
VIA GigaLAN DriverVIA GigaLAN Driver
VIA RAID Driver
VIA RAID Driver
VIA RAID DriverVIA RAID Driver
Support for SATA RAID devices
73
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