AXIOMTEK PICO841 User manual

PICO841/843
Intel®AtomTM E3845/E3827
Intel®Celeron®J1900/N2807
Processors Pico-ITX Board
User’s Manual

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Disclaimers
This manual has been carefully checked and believed to contain accurate information.
Axiomtek Co., Ltd. assumes no responsibility for any infringements of patents or any third
party’s rights, and any liability arising from such use.
Axiomtek does not warrant or assume any legal liability or responsibility for the accuracy,
completeness or usefulness of any information in this document. Axiomtek does not make any
commitment to update the information in this manual.
Axiomtek reserves the right to change or revise this document and/or product at any time
without notice.
No part of this document may be reproduced, stored in a retrieval system, or transmitted, in
any form or by any means, electronic, mechanical, photocopying, recording, or otherwise,
without the prior written permission of Axiomtek Co., Ltd.
CAUTION
If you replace wrong batteries, it causes the danger of explosion. It is recommended by the
manufacturer that you follow the manufacturer’s instructions to only replace the same or
equivalent type of battery, and dispose of used ones.
Copyright 2015 Axiomtek Co., Ltd.
All Rights Reserved
November 2015, Version A2
Printed in Taiwan

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ESD Precautions
Computer boards have integrated circuits sensitive to static electricity. To prevent chipsets
from electrostatic discharge damage, please take care of the following jobs with precautions:
Do not remove boards or integrated circuits from their anti-static packaging until you are
ready to install them.
Before holding the board or integrated circuit, touch an unpainted portion of the system
unit chassis for a few seconds. It discharges static electricity from your body.
Wear a wrist-grounding strap, available from most electronic component stores, when
handling boards and components.
Trademarks Acknowledgments
Axiomtek is a trademark of Axiomtek Co., Ltd.
Windows®is a trademark of Microsoft Corporation.
AMI is a trademark of American Megatrend Inc.
IBM, PC/AT, PS/2, VGA are trademarks of International Business Machines Corporation.
Intel®and Celeron®are trademarks of Intel Corporation.
Other brand names and trademarks are the properties and registered brands of their
respective owners.

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Table of Contents
Disclaimers.....................................................................................................ii
ESD Precautions...........................................................................................iii
Chapter 1 Introduction............................................. 1
1.1 Features...............................................................................................2
1.2 Specifications......................................................................................2
1.3 Utilities Supported ..............................................................................3
Chapter 2 Board and Pin Assignments.................... 5
2.1 Board Dimensions and Fixing Holes.................................................5
2.2 Board Layout.......................................................................................7
2.3 Assembly Drawing..............................................................................9
2.4 Jumper Settings................................................................................12
2.4.1 LVDS Voltage Selection (JP1 and JP2) .................................................... 13
2.4.2 Auto Power On (JP4) ................................................................................ 13
2.4.3 LVDS Brightness Control Mode Setting (JP5) .......................................... 13
2.4.4 Restore BIOS Optimal Defaults (JP6)....................................................... 13
2.5 Connectors ........................................................................................14
2.5.1 Board to Board Connectors (CN1 and CN2)............................................. 15
2.5.2 Fan Power Connector (CN3)..................................................................... 16
2.5.3 SMBus Connector (CN4) .......................................................................... 16
2.5.4 Power LED Header (CN6)......................................................................... 16
2.5.5 External Speaker and Internal Buzzer Header (CN7)............................... 16
2.5.6 LVDS Connector (CN8)............................................................................. 17
2.5.7 SATAPower Connector (CN9).................................................................. 19
2.5.8 Inverter Connector (CN10)........................................................................ 19
2.5.9 DC Power Connector (CN11).................................................................... 19
2.5.10 VGA Connector (CN12)............................................................................. 20
2.5.11 Ethernet Connector (LAN1)....................................................................... 20
2.5.12 SATA Connector (SATA1).......................................................................... 21
2.5.13 CMOS Battery Connector (BAT1) ............................................................. 21
2.5.14 Full-size PCI-Express Mini Card and mSATA Connector (SCN1)............. 22
2.5.15 SIM Card Slot (SCN2)............................................................................... 23
2.5.16 Half-size PCI-Express Mini Card Connector (SCN3)................................ 23
Chapter 3 AX93283 I/O Board ................................ 25
3.1 AX93283 Specifications....................................................................25
3.2 AX93283 Dimensions and Fixing Holes ..........................................25

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3.3 AX93283 Board Layout.....................................................................26
3.4 AX93283 Jumper Settings ................................................................27
3.4.1 COM1 Data/Power Selection (JP1 and JP2) ............................................ 27
3.5 AX93283 Connectors, Switches and LED .......................................28
3.5.1 System Reset Switch (CN1)...................................................................... 28
3.5.2 Audio Jack (CN2)...................................................................................... 28
3.5.3 COM1 Connector (CN3)............................................................................ 29
3.5.4 COM2 Connector (CN4)............................................................................ 29
3.5.5 System Power Switch (CN5)..................................................................... 29
3.5.6 Board to Board Connectors (CN9 and CN10)........................................... 30
3.5.7 USB Connectors (USB1 and USB2)......................................................... 31
3.5.8 Power and HDD LED Indicator (D1) ......................................................... 31
Chapter 4 AX93267 I/O Board ................................ 33
4.1 AX93267 Specifications....................................................................33
4.2 AX93267 Dimensions and Fixing Holes ..........................................34
4.3 AX93267 Board Layout.....................................................................35
4.4 AX93267 Connectors ........................................................................36
4.4.1 DC Power Jack (CN1)............................................................................... 36
4.4.2 DC Power Connector (CN2)...................................................................... 36
4.4.3 VGA Connector (CN3)............................................................................... 37
4.4.4 D-Sub VGA Connector (CN4) ................................................................... 37
4.4.5 Ethernet Connector (CN5) ........................................................................ 38
4.4.6 RJ-45 Ethernet Port (CN6)........................................................................ 38
Chapter 5 Hardware Description ........................... 39
5.1 Microprocessors ...............................................................................39
5.2 BIOS ...................................................................................................39
5.3 System Memory.................................................................................39
5.4 I/O Port Address Map........................................................................40
5.5 Interrupt Controller (IRQ) Map .........................................................41
5.6 Memory Map ......................................................................................43
Chapter 6 AMI BIOS Setup Utility .......................... 45
6.1 Starting...............................................................................................45
6.2 Navigation Keys ................................................................................45
6.3 Main Menu..........................................................................................46
6.4 Advanced Menu.................................................................................47
6.5 Chipset Menu.....................................................................................61
6.6 Security Menu....................................................................................65

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6.7 Boot Menu..........................................................................................66
6.8 Save & Exit Menu ..............................................................................67
Appendix A Watchdog Timer .................................... 69
A.1 About Watchdog Timer.....................................................................69
A.2 How to Use Watchdog Timer............................................................69
A.3Sample Program................................................................................70
Appendix B Window®7 Installation Guide ............... 73
Appendix C BIOS Flash Utility .................................. 75

PICO841/843 Pico-ITX Board
Introduction 1
Chapter 1
Introduction
The PICO841 is a Pico-ITX board with Intel®AtomTM E3845/E3827 processors. Meanwhile
PICO843, a Pico-ITX board, supports Intel®Celeron®J1900/N2807 processors. Both of them
deliver outstanding system performance through high-bandwidth interfaces, multiple I/O
functions for interactive applications and various embedded computing solutions.
The PICO841/843 have one 204-pin unbuffered SO-DIMM socket for DDR3L 1333/1066MHz
memory, with maximum memory capacity up to 8GB. It also features one Gigabit/Fast Ethernet,
one SATAport with transfer rates up to 3Gb/s, four USB 2.0 high speed compliant, and built-in
high definition audio codec that can achieve the best stability and reliability for industrial
applications. Moreover, it has one full-size PCI-Express Mini Card and one half-size
PCI-Express Mini Card which provide good expansions for network connecting. Additionally, it
provides you with unique embedded features, such as two serial ports (RS-232/422/485) and
Pico-ITX form factor that applies an extensive array of PC peripherals. The board can be
enhanced by its built-in watchdog timer function, a special industrial feature not commonly
seen on other motherboards.

PICO841/843 Pico-ITX Board
2 Introduction
1.1 Features
PICO841 - Intel®AtomTM quad core E3845 (1.91GHz), and dual core E3827 (1.75GHz)
PICO843 - Intel®Celeron®quad core J1900 (2GHz) and dual core N2807 (1.58GHz)
1 DDR3L SO-DIMM supports up to 8GB memory capacity
4 USB 2.0 ports
2 COM ports
1 full-size PCI-Express Mini Card
1 half-size PCI-Express Mini Card
+12V only DC-in supported
1.2 Specifications
CPU
PICO841
- Intel®AtomTM quad core E3845 1.91GHz.
- Intel®AtomTM dual core E3827 1.75GHz.
PICO843
- Intel®Celeron®quad core J1900 2GHz.
- Intel®Celeron®dual core N2807 1.58GHz.
Thermal Solution
Fanless but with reserved fan connector.
Operating Temperature
-20°C~70°C.
BIOS
American Megatrends Inc. UEFI (Unified Extensible Firmware Interface) BIOS.
16Mbit SPI Flash, DMI, Plug and Play.
PXE Ethernet Boot ROM.
System Memory
One 204-pin unbuffered DDR3L SO-DIMM socket.
Maximum up to 8GB DDR3L 1333/1066MHz memory.
Onboard Multi I/O
Controller: Fintek F81803U
Serial Ports: Two ports for RS-232/422/485.
Serial ATA
One SATA-300 connector.
mSATA supported.
Expansion
One full-size PCI-Express Mini Card socket complies with PCI-Express Mini Card
Spec. V1.2.
One half-size PCI-Express Mini Card socket complies with PCI-Express Mini Card
Spec. V1.2.
USB Interface
Four USB ports with fuse protection and comply with USB Spec. Rev. 2.0 in pin
headers.

PICO841/843 Pico-ITX Board
Introduction 3
Display
One 16-pin VGA wafer connector.
One 2x20-pin connector for 18-bit/24-bit dual channel LVDS and one 8-pin wafer
connector for inverter control. LVDS resolution is up to 1920x1200 in 24-bit dual
channels.
Trusted Platform Module (TPM)
Controller: ST ST33TPM12LPC via LPC bus interface.
Complies with TPM1.2 main and PC client specification.
Watchdog Timer
1~255 seconds or minutes; up to 255 levels.
Ethernet
One 16-pin wafer connector.
One port with Intel®i211AT supporting 1000/100/10Mbps Gigabit/Fast Ethernet with
Wake-on-LAN and PXE Boot ROM.
Audio
HD audio compliant with Realtek ALC662.
MIC-in and line-out in pin headers.
Power Input
One 1x4-pin wafer connector.
+12V only DC-in.
AT auto power on function supported.
Power Management
ACPI (Advanced Configuration and Power Interface).
Form Factor
Pico-ITX form factor.
Note
All specifications and images are subject to change without notice.
1.3 Utilities Supported
Chipset and graphics driver
Ethernet driver
Audio driver
XHCI driver
Trusted Execution Engine
Sideband Fabric Device

PICO841/843 Pico-ITX Board
4 Introduction
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PICO841/843 Pico-ITX Board
Board and Pin Assignments 5
Chapter 2
Board and Pin Assignments
2.1 Board Dimensions and Fixing Holes
Top View

PICO841/843 Pico-ITX Board
6 Board and Pin Assignments
Bottom View
Side View

PICO841/843 Pico-ITX Board
Board and Pin Assignments 7
2.2 Board Layout
Top View

PICO841/843 Pico-ITX Board
8 Board and Pin Assignments
Bottom View

PICO841/843 Pico-ITX Board
Board and Pin Assignments 9
2.3 Assembly Drawing
Heatsink for PICO841/843 (see image below):
First of all, use the following four screws to secure heatsink on heatspreader.
x4

PICO841/843 Pico-ITX Board
10 Board and Pin Assignments
For thermal dissipation, a heatspreader enables the PICO841/843’s components to dissipate
heat efficiently. Images below illustrate how to install the heatspreader.
Installing Heatspreader
The PICO841/843 has four assembly holes for installing heatspreader plate. Align and firmly
secure the heatspreader plate to the PICO841/843. Be careful not to over-tighten the screws.
x4 x4 x4 (8mm)

PICO841/843 Pico-ITX Board
Board and Pin Assignments 11
Installing Heatspreader and I/O Board
Gently insert I/O board into CN1 and CN2. Align and use the four screws to firmly secure the
heatspreader plate and I/O board to the PICO841/843. Be careful not to over-tighten the
screws. See chapter 3 and chapter 4 for more details of AX93283 and AX93267 I/O boards.
x4 x2 x2 x4 (8mm)
x2 (7mm) x2

PICO841/843 Pico-ITX Board
12 Board and Pin Assignments
2.4 Jumper Settings
Jumper is a small component consisting of jumper clip and jumper pins. Install jumper clip on 2
jumper pins to close. And remove jumper clip from 2 jumper pins to open. Below illustration
shows how to set up jumper.
Properly configure jumper settings on the PICO841/843 to meet your application purpose.
Below you can find a summary table of all jumpers and onboard default settings.
Note
Once the default jumper needs to be changed, please do it under power-off
condition.
Jumper
Description
Setting
JP1
LVDS +12V Voltage Selection
Default: None
None
JP2
LVDS +3.3V/+5V Voltage Selection
Default: +3.3V
1-2 Close
JP4
Auto Power On
Default: Disable
1-2 Close
JP5
LVDS Brightness Control Mode Setting
Default: PWM Mode
1-2 Close
JP6
Restore BIOS Optimal Defaults
Default: Normal Operation
1-2 Close

PICO841/843 Pico-ITX Board
Board and Pin Assignments 13
2.4.1 LVDS Voltage Selection (JP1 and JP2)
The board supports voltage selection for flat panel displays. Use these jumpers to set
LVDS connector (CN8) pin 1~6 VCCM to +3.3V, +5V or +12V. To prevent hardware
damage, before connecting please make sure that input voltage of flat panel is correct.
JP1
JP2
2.4.2 Auto Power On (JP4)
If this jumper is enabled for power input, the system will be automatically power on
without pressing soft power button. If this jumper is disabled for power input, it is
necessary to manually press soft power button to power on the system.
2.4.3 LVDS Brightness Control Mode Setting (JP5)
This jumper enables you to select PWM or voltage control mode for inverter connector
(CN10). These two control modes are for adjusting the brightness of LVDS panel.
2.4.4 Restore BIOS Optimal Defaults (JP6)
Put jumper clip to pin 2-3 for a few seconds then move it back to pin 1-2. Doing this
procedure can restore BIOS optimal defaults.
Function
JP1 Setting
+12V level
Close
N/A
Open
Function
JP2 Setting
+3.3V level (Default)
1-2 close
+5V level
2-3 close
Function
Setting
Disable auto power on (Default)
1-2 close
Enable auto power on
2-3 close
Function
Setting
PWM mode (Default)
1-2 close
Voltage mode
3-4 close
Function
Setting
Normal (Default)
1-2 close
Restore BIOS optimal defaults
2-3 close

PICO841/843 Pico-ITX Board
14 Board and Pin Assignments
2.5 Connectors
Signals go to other parts of the system through connectors. Loose or improper connection
might cause problems, please make sure all connectors are properly and firmly connected.
Here is a summary table which shows all connectors on the hardware.
Connector
Description
CN1
20-pin Board to Board Connector
CN2
40-pin Board to Board Connector
CN3
Fan Power Connector
CN4
SMBus Connector
CN6
Power LED Header
CN7
External Speaker and Internal Buzzer Header
CN8
LVDS Connector
CN9
SATA Power Connector
CN10
Inverter Connector
CN11
DC Power Connector
CN12
VGA Connector
LAN1
Ethernet Port
SATA1
SATA Connector
BAT1
CMOS Battery Connector
SCN1
Full-size PCI-Express Mini Card and mSATA Connector
SCN2
SIM Card Slot
SCN3
Half-size PCI-Express Mini Card Connector
SSODIMM1
DDR3L SO-DIMM Socket