Page 1
Operating Guide
EPIA-P820 Mainboard
Page 2
EPIA-P820 Operating Guide
Table of Contents
Table of Contents ..................................................................................................................i
VIA EPIA-P820 Overview .......................................................................................................2
Layout Diagrams ..................................................................................................................3
EPIA-P820 (top and bottom views) ......................................................................................3
VIA EPIA-P820 Specifications .................................................................................................4
VIA EPIA-P820 Processor SKU................................................................................................5
VIA EPIA-P820 Dimensions & Mounting Holes ..........................................................................6
VIA EPIA-P820 Height Distribution..........................................................................................7
Power Consumption ..............................................................................................................8
Tested Configurations ........................................................................................................8
Configuration 1 ..............................................................................................................8
Configuration 2 ..............................................................................................................8
Configuration 3 ..............................................................................................................8
Configuration 4 ..............................................................................................................8
Boot to Idle (XP) ...............................................................................................................9
Stress Tool .......................................................................................................................9
3DMark2003 .....................................................................................................................9
PowerDVD 6.0...................................................................................................................9
Power Specifications ...........................................................................................................10
VIA EPIA-P820 Microsoft and Linux Driver Support .................................................................11
Microsoft Driver Support...................................................................................................11
Linux Driver Support........................................................................................................11
Contact .............................................................................................................................12
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EPIA-P820 Operating Guide
VIA EPIA-P820 Overview
The VIA EPIA-P820 Pico-ITX mainboard is an ultra compact native x86 platform for a wide range of
embedded system applications. The mainboard is based on the VIA VX855 All-in-One System
Processor featuring the VIA Chrome™ 9 HCM DX9 IGP with video accelerators for rich digital media
performance.
The VIA EPIA-P820 onboard VIA Nano 1.2 GHz NanoBGA2 processor is a green, secure, and
efficient processor with its included VIA Padlock Security Engine, VIA CoolStream™ Architecture,
VIA StepAhead™ Technology Suite, and VIA TwinTurbo™ technology.
The VIA EPIA-P820 delivers the performance levels with its included sizeable support of up to 2 GB
of 800 MHz DDR2 memory and native support for SATA 3Gb/s storage devices.
The VIA EPIA-P820 is fully compatible with Microsoft® and Linux operating systems.
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EPIA-P820 Operating Guide
Layout Diagrams
EPIA-P820 (
TOP AND BOTTOM VIEWS
)
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EPIA-P820 Operating Guide
VIA EPIA-P820 Specifications1
Model Name EPIA-P820-12L
Processor VIA Nano 1.2 GHz NanoBGA2 processor
Chipset VIA VX855 All-in-One System Processor
System Memory - 1 x DDR2 800/667 SODIMM socket
- Up to 2 GB memory size
VGA - VIA Chrome™ 9 HCM DX9 Integrated Graphics with MPEG-2 accelerators
Onboard Storage - 1 x SATA 3Gb/s connector
- 1 x IDE 2.0 mm 44-pin connector
Onboard LAN - 1 x VIA VT6122 Gigabit Ethernet Controller
Onboard Audio - VIA VT1708S High Definition Audio Codec
Onboard I/O
Connectors
I/O Ports - 1 x HDMI® port
BIOS - AMI BIOS
Operating System Windows XP/Windows CE/Windows XPe and Linux
System Monitoring &
Management
Operating
Environment
Compliance CE/FCC/KC/BSMI/RoHS
Form Factor - Pico-ITX
- 1 x Gigabit LAN pin header
- 1 x Audio pin connector for Line-out, Line-in, and MIC-in
- 1 x Single-channel LVDS connector (5V/3V)
- 1 x Backlight control pin header
- 1 x Sys fan connector
- 1 x PS2 KBMS pin header
- 1 x USB pin header
- 1 x LPC pin connector
- 1 x SMBus pin connector
- 1 x DIO pin connector (4 GPI & 4 GPO)
- 2 x UART port/VCP pin headers
- 1 x Front panel pin header
- 1 x SATA power connector
- 1 x +12V DC-in power connector
- 1 x VGA port
- 1 x GigaLAN port
- 2 x USB ports
- 4 Mbit SPI flash memory
- Wake-on LAN and Keyboard-Power-on
- Timer-Power-on
- WatchDog Timer
- System power management, AC Power failure recovery
Temperature: 0°C up to 60°C
Humidity: 0% ~ 95% (relative humidity; non-condensing)
- 10 cm x 7.2 cm
1
Specifications subject to change without notice.
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EPIA-P820 Operating Guide
VIA EPIA-P820 Processor SKU
The VIA EPIA-P820 Pico-ITX mainboard is available in the following speed grades:
• 1.2 GHz VIA Nano Processor
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EPIA-P820 Operating Guide
VIA EPIA-P820 Dimensions & Mounting Holes
Note:
The mounting holes at the four corners can only fit M2 size screws (Ø1.86 mm – Ø1.89 mm).
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EPIA-P820 Operating Guide
VIA EPIA-P820 Height Distribution
EPIA-P820 board shown with P720-A module stacked on top
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EPIA-P820 Operating Guide
Power Consumption
Power consumption tests were performed on four different configurations. The following tables
show the mainboard’s voltage, amp and wattage values while running common applications in the
Windows XP environment.
T
ESTED CONFIGURATIONS
Configuration 1
• VIA Nano 1.2 GHz NanoBGA2 Processor with 800 MHz FSB
• 2.5" Fujitsu 80 GB hard drive
• 1 GB Kingston DDR2 800 MHz
Configuration 2
• VIA Nano 1.2 GHz NanoBGA2 Processor with 800 MHz FSB
• 2.5"Fujitsu 80 GB, hard drive
• 3.5" Seagate 80 GB hard drive
• 2 GB Hynix DDR2 800 MHz
Configuration 3
• VIA Nano 1.2 GHz NanoBGA2 Processor with 800 MHz FSB
• 4 GB InnoDisk IDE DOM
• 1 GB Kingston DDR2 800 MHz
Configuration 4
• VIA Nano 1.2 GHz NanoBGA2 Processor with 800 MHz FSB
• 4 GB InnoDisk IDE DOM
• 2 GB Hynix DDR2 800 MHz
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EPIA-P820 Operating Guide
B
OOT TO IDLE
Measured Voltage (V) Measure Amp (I) Watts (W)
Configuration 1 11.997 1.07 12.84
Configuration 2 11.997 1.56 18.72
Configuration 3 11.997 0.90 10.80
Configuration 4 11.997 0.91 10.92
(XP)
S
TRESS TOOL
Measured Voltage (V) Measure Amp (I) Watts (W)
Configuration 1 11.997 1.36 16.32
Configuration 2 11.997 1.81 21.71
Configuration 3 11.997 1.14 13.68
Configuration 4 11.997 1.18 14.16
3DM
ARK
2003
Measured Voltage (V) Measure Amp (I) Watts (W)
Configuration 1 11.997 1.29 15.48
Configuration 2 11.997 1.75 21.00
Configuration 3 11.997 1.19 14.28
Configuration 4 11.997 1.22 14.64
P
OWER
Measured Voltage (V) Measure Amp (I) Watts (W)
Configuration 1 11.997 1.05 12.60
Configuration 2 11.997 1.48 17.79
Configuration 3 11.997 0.86 10.32
Configuration 4 11.997 0.89 10.68
DVD 6.0
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EPIA-P820 Operating Guide
Power Specifications
The VIA EPIA-P820 Pico-ITX mainboard utilizes a +12V DC-in power connector for providing power
to the mainboard. The dimensions of the DC-in port are show in the figure below.
Figure 1: DC-in dimensions
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EPIA-P820 Operating Guide
VIA EPIA-P820 Microsoft and Linux Driver Support
M
ICROSOFT DRIVER SUPPORT
The VIA EPIA-P820 Pico-ITX mainboard is compatible with Microsoft operating systems. The latest
Windows XP drivers can be downloaded from the VIA Embedded website at www.viaembedded.com.
For embedded operating systems (Windows CE and Windows XP Embedded), the related drivers
can be found in the VIA Embedded website at www.viaembedded.com.
L
INUX DRIVER SUPPORT
The VIA EPIA-P820 Pico-ITX mainboard is highly compatible with many Linux distributions.
Support and drivers are provided through various methods including:
• Drivers provided by VIA
• Using a driver built into a distribution package
• Visiting www.viaembedded.com for the latest updated drivers
• Installing a third party driver (such as the ALSA driver from the Advanced Linux Sound
Architecture project for integrated audio)
For OEM clients and system integrators developing a product for long term production, other code
and resources may also be made available. You can submit a request to your VIA Embedded
support contact.
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EPIA-P820 Operating Guide
Contact
For more information on the VIA EPIA-P820 Pico-ITX mainboard contact your sales representative
or visit our website at www.viaembedded.com.
Taiwan Headquarters
1F, 531 Zhong-Zheng Road
Xindian District, New Taipei City, 231
Taiwan
TEL: 886.2.2218.5452
FAX: 886.2.2218.5453
Email: embedded@via.com.tw
China
Tsinghua Science Park Bldg. 7
No. 1 Zongguancun East Road
Haiden District, Beijing 100084
TEL: 86.10.59852288
FAX: 86.10.59852299
Email: embedded@viatech.com.cn
USA
940 Mission Court
Fremont, CA 94539
USA
TEL: 1.510.683.3300
FAX: 1.510.687.4654
Email: embedded@viatech.com
Japan
3-15-7 Ebisu MT Bldg. 6F
Higashi, Shibuya-ku
Tokyo 150-0011
TEL: 81.3.5466.1637
FAX: 81.3.5466.1638
Email: embedded@viatech.co.jp
Europe
In den Dauen 6
53117 Bonn
Germany
TEL: 49.228.688565.0
FAX: 49.228.688565.19
Email: embedded@via-tech.de
Korea
2F, Sangjin Bldg., 417
Dogok-Dong, Gangnam-Gu
Seoul 135-854
TEL: 82.2.571.2986
FAX: 82.2.571.2987
Email: embedded@via-korea.com
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