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PICO840
Intel
®
Atom
TM
E3845/E3827
Processors Pico-ITX Board
User’s Manual
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
March 2015, Version A1
Printed in Taiwan ii
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 Pentium
®
are trademarks of Intel Corporation.
Other brand names and trademarks are the properties and registered brands of their respective owners. iii
Table of Contents
Chapter 1 Introduction ............................................. 1
Utilities Supported .............................................................................. 3
Chapter 2 Board and Pin Assignments .................... 5
Board Dimensions and Fixing Holes ................................................. 5
Assembly Drawing .............................................................................. 9
Jumper and Switch Settings ............................................................ 12
LVDS Voltage Selection (JP1 and JP2) .................................................... 13
LVDS Brightness Control Mode Setting (JP4) .......................................... 13
Restore BIOS Optimal Defaults (JP5) ....................................................... 13
DC Power Jack w/ Screw (CN3) ............................................................... 15
SMBus Connector (CN4) .......................................................................... 16
Power LED Header (CN7) ......................................................................... 18
SATA Power Connector (CN8) .................................................................. 18
External Speaker and Internal Buzzer Header (CN9) ............................... 18
Fan Power Connector (CN11) ................................................................... 19
Board to Board Connectors (CN12 and CN13) ......................................... 19
SATA Connector (SATA1) .......................................................................... 20
CMOS Battery Connector (BAT1) ............................................................. 21
Full-size PCI-Express Mini Card and mSATA Connector (SCN1) ............. 21
Chapter 3 I/O Board ................................................ 23
AX93283 Specifications .................................................................... 23
AX93283 Dimensions and Fixing Holes .......................................... 23
iv
AX93283 Board Layout ..................................................................... 24
AX93283 Jumper Settings ................................................................ 25
COM1 Data/Power Selection (JP1 and JP2) ............................................ 25
AX93283 Connectors, Switches and LED ....................................... 26
System Reset Switch (CN1) ...................................................................... 26
COM1 Connector (CN3) ............................................................................ 27
COM2 Connector (CN4) ............................................................................ 27
System Power Switch (CN5) ..................................................................... 27
Board to Board Connectors (CN9 and CN10) ........................................... 28
USB Connectors (USB1 and USB2) ......................................................... 29
Power and HDD LED Indicator (D1) ......................................................... 29
Chapter 4 Hardware Description ........................... 31
Microprocessors ............................................................................... 31
System Memory ................................................................................. 31
I/O Port Address Map ........................................................................ 32
Interrupt Controller (IRQ) Map ......................................................... 33
Memory Map ...................................................................................... 36
Chapter 5 AMI BIOS Setup Utility .......................... 37
Navigation Keys ................................................................................ 37
Advanced Menu ................................................................................. 40
Save & Exit Menu .............................................................................. 56
Appendix A Watchdog Timer ................................... 59
About Watchdog Timer ..................................................................... 59
How to Use Watchdog Timer ............................................................ 59
Sample Program ................................................................................ 60
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PICO840 Intel
®
Atom
TM
E3845/E3827 processors Pico-ITX Board
Chapter 1
Introduction
The PICO840 is a Pico-ITX board with Intel
®
Atom
TM
E3845/E3827 that delivers outstanding system performance through high-bandwidth interfaces, multiple I/O functions for interactive applications and various embedded computing solutions.
The board has one 204-pin unbuffered SO-DIMM socket for DDR3L 1333/1066MHz SO-DIMM memory, maximum memory capacity up to 8GB. It also features one Gigabit/Fast Ethernet, one serial ATA port 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. Additionally, it provides you with unique embedded features, such as two serial ports in 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.
Introduction 1
PICO840 Intel
®
Atom
TM
E3845/E3827 processors Pico-ITX Board
1.1 Features
Intel
®
Atom
TM
quad core E3845 (1.91GHz) and dual core E3827 (1.75GHz)
1 DDR3L SO-DIMM supports up to 8GB memory capacity
4 USB 2.0 ports
2 COM ports
+12V DC-in only
1 PCI-Express Mini Card w/ mSATA supported
1.2 Specifications
CPU
Intel
®
Intel
®
Atom
Atom
TM
quad core E3845 1.91GHz.
TM
dual core E3827 1.75GHz
Thermal Solution
Fanless but with reserved fan connector.
Operating Temperature
-40°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 (Optional)
USB Interface
Four USB ports with fuse protection and complies with USB Spec. Rev. 2.0.
Display
A standard 15-pin D-Sub VGA connector which is co-layout with a HDMI connector.
One 2x20-pin connector for 18/24-bit single/dual channel LVDS and one 8-pin inverter connector. LVDS resolution is up to 1920x1200 in 24-bit dual channel.
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.
2 Introduction
PICO840 Intel
®
Atom
TM
E3845/E3827 processors Pico-ITX Board
Ethernet
One port with Intel
®
i210IT for Gigabit/Fast Ethernet.
One RJ-45 connector.
Audio
HD audio compliant with Realtek ALC662.
MIC-in and line-out.
Expansion Interface
One full-size PCI-Express Mini Card socket complies with PCI-Express Mini Card
Spec. V1.2.
Power Input
DC power jack connector, co-layout with 1x2-pin right angle connector.
+12V DC-in only.
AT auto power on function supported.
Power Management
ACPI (Advanced Configuration and Power Interface).
Form Factor
Pico-ITX form factor.
All specifications and images are subject to change without notice.
Note
1.3 Utilities Supported
Chipset and graphics driver
Ethernet driver (i210IT)
Audio driver
Trusted Execution Engine
Sideband Fabric Device
Introduction 3
PICO840 Intel
®
Atom
TM
E3845/E3827 processors Pico-ITX Board
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4 Introduction
PICO840 Intel
®
Atom
TM
E3845/E3827 processors Pico-ITX Board
Chapter 2
Board and Pin Assignments
2.1 Board Dimensions and Fixing Holes
Top View
Board and Pin Assignments 5
PICO840 Intel
®
Atom
TM
E3845/E3827 processors Pico-ITX Board
Bottom View
6
Side View
Board and Pin Assignments
PICO840 Intel
®
Atom
TM
E3845/E3827 processors Pico-ITX Board
2.2 Board Layout
Top View
Side View
Board and Pin Assignments 7
PICO840 Intel
®
Atom
TM
E3845/E3827 processors Pico-ITX Board
SCN1
SSODIMM1
Bottom View
8 Board and Pin Assignments
PICO840 Intel
®
Atom
TM
E3845/E3827 processors Pico-ITX Board
2.3 Assembly Drawing
Heatsink for PICO840 (see image below):
First of all, use the following four screws to secure heatsink on heatspreader.
Board and Pin Assignments
x4
9
PICO840 Intel
®
Atom
TM
E3845/E3827 processors Pico-ITX Board
For thermal dissipation, a heatspreader enables the PICO840 ’s components to dissipate heat efficiently. Images below illustrate how to install the heat spreader.
Installing Heatspreader
The PICO840 has four assembly holes for installing heatspreader plate. Align and firmly secure the heatspreader plate to the PICO840. Be careful not to over-tighten the screws. x4 x4 x4
10 Board and Pin Assignments
PICO840 Intel
®
Atom
TM
E3845/E3827 processors Pico-ITX Board
Installing Heatspreader and AX93283 I/O Board
Gently insert I/O board into CN12 and CN13. Align and firmly secure the heatspreader plate and I/O board to PICO840. Be careful not to over-tighten the screws. See chapter 3 for more details of AX93283 I/O board.
x2 x4 x4 x2
Board and Pin Assignments 11
PICO840 Intel
®
Atom
TM
E3845/E3827 processors Pico-ITX Board
2.4 Jumper and Switch 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 and switch settings on the PICO840 to meet your application purpose. Below you can find a summary table of jumpers, switch and onboard default settings.
Note
Once the default jumper or switch setting needs to be changed, please do it under power-off condition.
Jumper and Switch Description Setting
JP1
JP2
JP4
JP5
SW1
LVDS +12V Voltage Selection
Default: N/A
LVDS +3.3V/+5V Voltage Selection
Default: +3.3V
LVDS Brightness Control Mode Setting
Default: PWM Mode
Restore BIOS Optimal Defaults
Default: Normal Operation
Auto Power On
Default: Disable
1-2 Open
1-2 Close
1-2 Close
1-2 Close
1-2 Close
12 Board and Pin Assignments
PICO840 Intel
®
Atom
TM
E3845/E3827 processors Pico-ITX Board
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 (CN6) 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.
Function JP1 Setting
JP1
+12V level
N/A
Close
Open
Function
+3.3V level (Default)
+5V level
JP2 Setting
1-2 close
2-3 close
JP2
2.4.2 LVDS Brightness Control Mode Setting (JP4)
The JP4 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.
Function
PWM mode (Default)
Voltage mode
Setting
1-2 close
3-4 close
2.4.3 Restore BIOS Optimal Defaults (JP5)
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 Setting
Normal (Default)
Restore BIOS optimal defaults
1-2 close
2-3 close
2.4.4 Auto Power On (SW1)
If SW1 is enabled for power input, the system will be automatically power on without pressing soft power button. If SW1 is disabled for power input, it is necessary to manually press soft power button to power on the system.
Function Setting
Disable auto power on (Default) 1-2 close
Enable auto power on 2-3 close
Board and Pin Assignments 13
PICO840 Intel
®
Atom
TM
E3845/E3827 processors Pico-ITX Board
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
CN2
CN3
CN4
CN6
CN7
CN8
CN9
CN10
CN11
CN12
CN13
LAN1
SATA1
BAT1
SCN1
SSODIMM1
VGA Connector
HDMI Connector
DC Power Jack w/ Screw
SMBus Connector
LVDS Connector
Power LED Header
SATA Power Connector
External Speaker and Internal Buzzer Header
Inverter Connector
Fan Power Connector
40-pin Board to Board Connector
20-pin Board to Board Connector
Ethernet Port
SATA Connector
CMOS Battery Connector
Full-size PCI-Express Mini Card and mSATA Connector
DDR3L SO-DIMM Connector
14 Board and Pin Assignments
PICO840 Intel
®
Atom
TM
E3845/E3827 processors Pico-ITX Board
2.5.1 VGA Connector (CN1)
The CN1 is a standard 15-pin D-Sub connector which is co-layout with HDMI connector
(CN2). It is commonly used for VGA display. This VGA interface configuration can be configured via software utility.
Pin Signal
1
3
RED
BLUE
5
7
GND
GND
9 CRT_VCC
11 N.C
13 Hsync
15 DDC_CLK
Pin Signal
2
4
GREEN
N.C
6
8
CRT_DETE
GND
10 GND
12 DDC_DATA
14 Vsync
2.5.2 HDMI Connector (CN2)
The HDMI (High-Definition Multimedia Interface) is a compact digital interface which is capable of transmitting high-definition video and high-resolution audio over a single cable.
Pin Signal Pin Signal
1
3
5
7
9
11
13
15
17
HDMI OUT_DATA2+ 2
HDMI OUT_DATA2- 4
GND
HDMI OUT_DATA1+
GND 6
HDMI OUT_DATA0+ 8
HDMI OUT_DATA1-
GND
HDMI OUT_DATA0- 10 HDMI OUT_Clock+
GND
N.C.
HDMI OUT_SCL
GND
19 HDMI_HTPLG
12 HDMI OUT_Clock-
14 N.C.
16 HDMI OUT_SDA
18 +5V
2.5.3 DC Power Jack w/ Screw (CN3)
The CN3 is a DC power jack with screw. Firmly insert at least 60W adapter into this connector. Loose connection may cause system instability and make sure all components/devices are properly installed before connecting this power jack
Board and Pin Assignments 15
PICO840 Intel
®
Atom
TM
E3845/E3827 processors Pico-ITX Board
2.5.4 SMBus Connector (CN4)
This connector is for SMBus (System Management Bus) interface.
Pin Signal
1
2
3
SMBus clock
SMBus data
GND
2.5.5 LVDS Connector (CN6)
This board has a 2x20-pin connector for LVDS LCD interface. It is strongly recommended to use the matching JST SHDR-40VS-B connector for LVDS interface.
Pin 1~6 VCCM can be set to +3.3V, +5V or +12V by setting JP2 or JP1 (see section
2.4.1).
18-bit single channel
Pin Signal Pin Signal
1
3
VCCM
VCCM
5
7
VCCM
N.C
9 GND
11 N.C
13 N.C
2
4
VCCM
VCCM
6
8
VCCM
N.C
10 GND
12 N.C
14 N.C
15 GND
17 N.C
19 N.C
16 GND
18 N.C
20 N.C
21 GND 22 GND
23 Channel A D0- 24 N.C
25 Channel A D0+ 26 N.C
27 GND 28 GND
29 Channel A D1- 30 N.C
31 Channel A D1+ 32 N.C
33 GND 34 GND
35 Channel A D2- 36 Channel A CLK-
37 Channel A D2+ 38 Channel A CLK+
39 GND 40 GND
16 Board and Pin Assignments
PICO840 Intel
®
Atom
TM
E3845/E3827 processors Pico-ITX Board
24-bit single channel
Pin Signal Pin Signal
18-bit dual channel
Pin Signal Pin Signal
1 VCCM
3 VCCM
5 VCCM
7 N.C
9 GND
2 VCCM
4 VCCM
6 VCCM
8 N.C
10 GND
11 N.C
13 N.C
15 GND
17 N.C
12 N.C
14 N.C
16 GND
18 N.C
19 N.C
21 GND
20 N.C
22 GND
23 Channel A D0- 24 N.C
25 Channel A D0+ 26 N.C
27 GND 28 GND
29 Channel A D1- 30 Channel A D3-
31 Channel A D1+ 32 Channel A D3+
33 GND 34 GND
35 Channel A D2- 36 Channel A CLK-
37 Channel A D2+ 38 Channel A CLK+
39 GND 40 GND
24-bit dual channel
Pin Signal Pin Signal
1 VCCM 2 VCCM
3 VCCM
5 VCCM
7 N.C
9 GND
4 VCCM
6 VCCM
8 N.C
10 GND
11 Channel B D3- 12 Channel B D0-
13 Channel B D3+ 14 Channel B D0+
15 GND 16 GND
17 Channel B CLK- 18 Channel B D1-
19 Channel B CLK+ 20 Channel B D1+
21 GND 22 GND
23 Channel A D0- 24 Channel B D2-
25 Channel A D0+ 26 Channel B D2+
27 GND 28 GND
29 Channel A D1- 30 Channel A D3-
31 Channel A D1+ 32 Channel A D3+
33 GND 34 GND
35 Channel A D2- 36 Channel A CLK-
37 Channel A D2+ 38 Channel A CLK+
39 GND 40 GND
1 VCCM
3 VCCM
5 VCCM
7 N.C
2 VCCM
4 VCCM
6 VCCM
8 N.C
9 GND
11 N.C
13 N.C
15 GND
10 GND
12 Channel B D0-
14 Channel B D0+
16 GND
17 Channel B CLK- 18 Channel B D1-
19 Channel B CLK+ 20 Channel B D1+
21 GND 22 GND
23 Channel A D0-
25 Channel A D0+
27 GND
29 Channel A D1-
31 Channel A D1+
33 GND
35 Channel A D2-
37 Channel A D2+
39 GND
24 Channel B D2-
26 Channel B D2+
28 GND
30 N.C
32 N.C
34 GND
36 Channel A CLK-
38 Channel A CLK+
40 GND
Board and Pin Assignments 17
PICO840 Intel
®
Atom
TM
E3845/E3827 processors Pico-ITX Board
2.5.6 Power LED Header (CN7)
The CN7 is for power LED interface.
Pin Signal
1
2
+5V
GND
2.5.7 SATA Power Connector (CN8)
The CN8 is for SATA power interface.
Pin
1
2
3
4
Signal
+12V
GND
GND
+5V
2.5.8 External Speaker and Internal Buzzer Header (CN9)
Pin 1, 2 and 3 connect the case-mounted speaker unit or internal buzzer. While connecting the CPU board to an internal buzzer, please set pin 2 and 3 closed (default); while connecting to an external speaker, you need to set pins 2 and 3 opened and connect the speaker cable to pin 1(+) and pin 2(-).
Pin
1
2
3
Signal
EXT SPK+
EXT SPK-
Buzzer
2.5.9 Inverter Connector (CN10)
This is a DF13-8S-1.25C 8-pin connector for inverter. We strongly recommend you to use the matching DF13-8S-1.25C connector to avoid malfunction.
Pin
4
5
6
1
2
3
7
8
Signal
VBL1 (+12V level)
VBL1 (+12V level)
VBL2 (+5V level)
VBL_ENABLE
GND
GND
GND
VBL Brightness Control
18 Board and Pin Assignments
PICO840 Intel
®
Atom
TM
E3845/E3827 processors Pico-ITX Board
2.5.10 Fan Power Connector (CN11)
The CN11 is a 2.5mm pitch wafer connector for fan power interface.
1 2
Pin
1
2
Signal
+5V
GND
2.5.11 Board to Board Connectors (CN12 and CN13)
The pin assignments of CN12 are given as follows.
Pin Signal Pin Signal
1
3
5
MIC
LINE_IN_L
LINE_IN_R
7
9
GND
GND
11 USB1_PWR
2
4
6
LINE_OUT_L
LINE_OUT_R
GND
8 GND
10 GND
12 USB1_PWR
13 USB0_DATA- 14 USB1_DATA-
15 USB0_DATA+ 16 USB1_DATA+
17 GND 18 GND
19 GND
21 USB2_PWR
20
22
GND
USB2_PWR
23 USB2_DATA- 24 USB3_DATA-
25 USB2_DATA+ 26 USB3_DATA+
27 GND 28 GND
29 GND
31 +5V
30
32
GND
PS_ON
33 RESET
35 +5V
37 HDD_LED
39 GND
34
36
38
40
GND
+12V
+12V
Ni
2 40
1 39
Board and Pin Assignments 19
PICO840 Intel
®
Atom
TM
E3845/E3827 processors Pico-ITX Board
The pin assignments of CN13 are given as follows.
Pin Signal Pin Signal
2 20
1
3
5
7
DCD2
RXD2
TXD2
DTR2
9 GND
11 DCD1
13 RXD1
15 TXD1
17 DTR1
19 GND
2
4
6
8
DSR2
RTS2
CTS2
RI2
10 +5V
12 DSR1
14 RTS1
16 CTS1
18 RI1
20 +5V
1 19
It is suggested to insert AX93283 I/O board into CN12 and CN13 (see chapter 3 for details of AX93283).
Note
2.5.12 Ethernet Port (LAN1)
The board has one RJ-45 Ethernet connector. Connection can be established by plugging one end of the Ethernet cable into this RJ-45 connector and the other end
(phone jack) to a 1000/100/10-Base-T hub.
Pin Signal Pin Signal
L1 MDI0P
L2 MDI0N
L3 MDI1P
L5 MDI2P
L6 MDI2N
L7 MDI3P
L4 MDI1N
A
L8
Active LED (Yellow)
MDI3N
B
100 LAN LED (Green) / 1000 LAN LED
(Orange)
2.5.13 SATA Connector (SATA1)
This Serial Advanced Technology Attachment (Serial ATA or SATA) connector is for high-speed SATA interface port. It is a computer bus interface for connecting to devices such as hard disk drives.
Pin
1
2
3
4
5
6
7
Signal
GND
TXP
TXN
GND
RXN
RXP
GND
1
20 Board and Pin Assignments
PICO840 Intel
®
Atom
TM
E3845/E3827 processors Pico-ITX Board
2.5.14 CMOS Battery Connector (BAT1)
This connector is for CMOS battery interface.
Pin
1
2
Signal
+3.3V
GND
1
2.5.15 Full-size PCI-Express Mini Card and mSATA Connector
(SCN1)
This is a full-size PCI-Express Mini Card connector on the bottom side applying to either
PCI-Express or USB 2.0 or SATA (mSATA). It complies with PCI-Express Mini Card Spec.
V1.2. It can also support mSATA cards. Please refer to BIOS setting in section 5.4 to enable or disable mSATA support.
Pin Signal Pin Signal
1 WAKE# 2 +3.3VSB
3
5
7
9
No use
No use
CLKREQ#
GND
11 REFCLK-
13 REFCLK+
15 GND
17 No use
19 No use
21 GND
23
25
PE_RXN3/
SATA_RXP
PE_RXP3/
SATA_RXN
27 GND
29 GND
31
PE_TXN3/
SATA_TXN
33
PE_TXP3/
SATA_TXP
35 GND
37 GND
39 +3.3VSB
41 +3.3VSB
43 GND
45 No use
47 No use
49 No use
51 No use
26
28
30
32
34
36
38
40
42
44
46
48
50
52
4
6
8
10
12
14
16
18
20
22
24
GND
+1.5V
No use
No use
No use
No use
No use
GND
W_DISABLE#
PERST#
+3.3VSB
GND
+1.5V
SMB_CLK
SMB_DATA
GND
USB_D8-
USB_D8+
GND
No use
No use
No use
+1.5V
GND
+3.3VSB
Board and Pin Assignments 21
PICO840 Intel
®
Atom
TM
E3845/E3827 processors Pico-ITX Board
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22 Board and Pin Assignments
PICO840 Intel
®
Atom
TM
E3845/E3827 processors Pico-ITX Board
Chapter 3
I/O Board
The AX93283 is an I/O expansion board which is suggested to insert carefully into CN12 and
CN13 of PICO840. Its specifications and detailed information are given in this chapter.
3.1 AX93283 Specifications
Size
29.25mm x 118mm
Features
Supports audio jack (MIC-in/line-out).
Four USB 2.0.
Serial Ports: Two ports for RS-232/422/485.
Power-on, reset and red/green LED.
All specifications and images are subject to change without notice.
Note
3.2 AX93283 Dimensions and Fixing Holes
AX93283 I/O Board
Top View
23
PICO840 Intel
®
Atom
TM
E3845/E3827 processors Pico-ITX Board
Bottom View
3.3 AX93283 Board Layout
Top View
Side View
24 AX93283 I/O Board
PICO840 Intel
®
Atom
TM
E3845/E3827 processors Pico-ITX Board
3.4 AX93283 Jumper Settings
Properly configure jumper settings on the AX93283 I/O board to meet your application purpose.
Below you can find a summary table of all jumpers and onboard default settings.
Note
Once the default jumper setting needs to be changed, please do it under power-off condition.
Jumper Description Setting
JP1
JP2
COM1 Data/+12V Power Selection
Default: RS-232 Data
COM1 Data/+5V Power Selection
Default: RS-232 Data
CN3 Pin 18: RI
CN3 Pin 10: DCD
1-2 Close
1-2 Close
3.4.1 COM1 Data/Power Selection (JP1 and JP2)
The COM1 port has +12V level power capability on RI and +5V level on DCD by setting
JP1 and JP2, respectively. When this port is set to +12V or +5V level, please make sure its communication mode is RS-232 (see section 5.4).
Function
Data: Set CN3 pin 18 to RI (Default)
Power: Set CN3 pin 18 to +12V level
JP1 Setting
1-2 close
2-3 close
Function JP2 Setting
Data: Set CN3 pin 10 to DCD (Default) 1-2 close
Power: Set CN3 pin 10 to +5V level 2-3 close
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3.5 AX93283 Connectors, Switches and LED
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, switches and LED on the hardware.
Connector/Switch/LED Description
CN1
CN2
CN3
CN4
CN5
CN9
CN10
USB1~USB2
D1
System Reset Switch
Audio Jack
COM1 Connector
COM2 Connector
System Power Switch
40-pin Board to Board Connector
20-pin Board to Board Connector
USB 2.0 Connectors
Power and HDD LED indicator
3.5.1 System Reset Switch (CN1)
This switch reboots your computer without turning off the power supply. It is a better way to reboot your system for a longer life of the system power supply.
Function
On
Off
Description
Reset system
Keep system status
3.5.2 Audio Jack (CN2)
This is audio jack with HD audio support. Install audio driver, and then attach audio devices to CN2.
Pin Color
Green
Pink
Signal
Line-out
MIC-in
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3.5.3 COM1 Connector (CN3)
CN3 is the lower connector of the double-deck DB-9 connector. Only COM1 comes with power capability on DCD and RI pins by setting jumpers (see section 3.4.1). The pin assignments of RS-232/422/485 are listed in table below. If you need COM1 port to support RS-422 or RS-485, please refer to section 5.4.
Pin RS-232
10 DCD
11 RXD
12 TXD
13 DTR
14 GND
15 DSR
16 RTS
17 CTS
18 RI
RS-422
TX-
TX+
RX+
RX-
No use
No use
No use
No use
No use
RS-485
Data-
Data+
N.C
N.C.
No use
No use
No use
No use
No use
CN3
3.5.4 COM2 Connector (CN4)
CN4 is the upper connector of the double-deck DB-9 connector. The pin assignments of
RS-232/422/485 are listed in table below. If you need COM2 port to support RS-422 or
RS-485, please refer to section 5.4.
Pin RS-232
4
5
6
7
1
2
3
8
9
DCD
RXD
TXD
DTR
GND
DSR
RTS
CTS
RI
RS-422
TX-
TX+
RX+
RX-
No use
No use
No use
No use
No use
RS-485
Data-
Data+
N.C
N.C.
No use
No use
No use
No use
No use
CN4
3.5.5 System Power Switch (CN5)
This switch is for turning on/off the system power.
Function Description
On
Off
Turn on/off system
Keep system status
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3.5.6 Board to Board Connectors (CN9 and CN10)
The pin assignments of CN9 are given as follows.
Pin Signal Pin Signal
1 39
1
3
5
MIC
LINE_IN_L
LINE_IN_R
7
9
GND
GND
11 USB1_PWR
2
4
6
LINE_OUT_L
LINE_OUT_R
GND
8 GND
10 GND
12 USB1_PWR
13 USB0_DATA- 14 USB1_DATA-
15 USB0_DATA+ 16 USB1_DATA+
17 GND 18 GND
19 GND
21 USB2_PWR
20
22
GND
USB2_PWR
23 USB2_DATA- 24 USB3_DATA-
25 USB2_DATA+ 26 USB3_DATA+
27 GND 28 GND
29 GND 30 GND
31 +5V
33 RESET
35 +5V
37 HDD_LED
39 GND
32
34
36
38
40
PS_ON
GND
+12V
+12V
Ni
2 40
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The pin assignments of CN10 are given as follows.
Pin Signal
1
3
5
7
DCD2
RXD2
TXD2
DTR2
9 GND
11 DCD1
13 RXD1
15 TXD1
17 DTR1
19 GND
Pin Signal
2
4
6
8
DSR2
RTS2
CTS2
RI2
10 +5V
12 DSR1
14 RTS1
16 CTS1
18 RI1
20 +5V
1 19
2 20
Please gently insert CN9 and CN10 into CN12 and CN13 of PICO840.
Note
3.5.7 USB Connectors (USB1 and USB2)
1
2
3
4
The board comes with two double-deck Universal Serial Bus (compliant with USB 2.0
(480Mbps)) connectors on the rear I/O which are for installing USB peripherals such as keyboard, mouse, scanner, etc.
Pin Signal Pin Signal
+5V 5
USB1/3_DATA- 6
USB1/3_DATA+ 7
GND 8
+5V
USB2/4_DATA-
USB2/4_DATA+
GND
5 6 7 8
1 2 3 4
3.5.8 Power and HDD LED Indicator (D1)
The red LED is linked to Hard Disk Drive (HDD) activity signal. LED flashes every time when HDD is accessed.
The power LED (green) lights up and remain steady while the system is powered on.
LED Color
Red
Green
Description
Hard disk drive activity
Power on/off
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Chapter 4
Hardware Description
4.1 Microprocessors
The PICO840 supports Intel
® operate under Windows
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7 and Windows
®
8 environments. The system performance depends on the microprocessor. Make sure all correct settings are arranged for your installed microprocessor to prevent the CPU from damages.
4.2 BIOS
The PICO840 uses AMI Plug and Play BIOS with a single 16Mbit SPI Flash.
4.3 System Memory
The PICO840 supports one 204-pin DDR3L SO-DIMM socket for maximum memory capacity up to 8GB DDR3L SDRAMs. The memory module comes in sizes of 1GB, 2GB, 4GB and 8GB.
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4.4 I/O Port Address Map
The Intel
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4.5 Interrupt Controller (IRQ) Map
The interrupt controller (IRQ) mapping list is shown as follows:
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4.6 Memory Map
The memory mapping list is shown as follows:
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Chapter 5
AMI BIOS Setup Utility
The AMI UEFI BIOS provides users with a built-in setup program to modify basic system configuration. All configured parameters are stored in a flash chip to save the setup information whenever the power is turned off. This chapter provides users with detailed description about how to set up basic system configuration through the AMI BIOS setup utility.
5.1 Starting
To enter the setup screens, follow the steps below:
1. Turn on the computer and press the <Del> key immediately.
2. After you press the <Del> key, the main BIOS setup menu displays. You can access the other setup screens from the main BIOS setup menu, such as the Advanced and Chipset menus.
Note
If your computer cannot boot after making and saving system changes with BIOS setup, you can restore BIOS optimal defaults by setting JP5 (see section 2.4.3).
It is strongly recommended that you should avoid changing the chipset ’s defaults. Both AMI and your system manufacturer have carefully set up these defaults that provide the best performance and reliability.
5.2 Navigation Keys
The BIOS setup/utility uses a key-based navigation system called hot keys. Most of the BIOS setup utility hot keys can be used at any time during the setup navigation process. These keys include <F1>, <F2>, <Enter>, <ESC>, <Arrow> keys, and so on.
Some of the navigation keys differ from one screen to another.
Note
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Hot Keys Description
Left/Right
The Left and Right <Arrow> keys allow you to select a setup screen.
Up/Down
+
Plus/Minus
Tab
F1
F2
F3
The Up and Down <Arrow> keys allow you to select a setup screen or sub-screen.
The Plus and Minus <Arrow> keys allow you to change the field value of a particular setup item.
The <Tab> key allows you to select setup fields.
The <F1> key allows you to display the General Help screen.
The <F2> key allows you to Load Previous Values.
F4
Esc
Enter
The <F3> key allows you to Load Optimized Defaults.
The <F4> key allows you to save any changes you have made and exit
Setup. Press the <F4> key to save your changes.
The <Esc> key allows you to discard any changes you have made and exit the Setup. Press the <Esc> key to exit the setup without saving your changes.
The <Enter> key allows you to display or change the setup option listed for a particular setup item. The <Enter> key can also allow you to display the setup sub- screens.
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5.3 Main Menu
When you first enter the setup utility, you will enter the Main setup screen. You can always return to the Main setup screen by selecting the Main tab. System Time/Date can be set up as described below. The Main BIOS setup screen is shown below.
BIOS Information
Display the BIOS information.
System Language
Choose the system default language.
System Date/Time
Use this option to change the system time and date. Highlight System Time or System
Date using the <Arrow> keys. Enter new values through the keyboard. Press the <Tab> key or the <Arrow> keys to move between fields. The date must be entered in MM/DD/YY format. The time is entered in HH:MM:SS format.
Access Level
Display the access level of current user.
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5.4 Advanced Menu
The Advanced menu also allows users to set configuration of the CPU and other system devices. You can select any of the items in the left frame of the screen to go to the sub menus:
►
ACPI Settings
►
F81803 Super IO Configuration
►
F81803 HW Monitor
►
CPU Configuration
►
IDE Configuration
►
Trusted Computing
►
USB Configuration
For items marked with “”, please press <Enter> for more options.
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ACPI Settings
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ACPI Sleep State
Select the ACPI (Advanced Configuration and Power Interface) sleep state. Configuration options are Suspend Disabled and S3 (Suspend to RAM). The default setting is S3
(Suspend to RAM); this option selects ACPI sleep state the system will enter when suspend button is pressed.
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F81803 Super IO Configuration
You can use this screen to select options for the Super IO Configuration, and change the value of the selected option. A description of the selected item appears on the right side of the screen. For items marked with “”, please press <Enter> for more options.
Serial Port 1~2 Configuration
Use these items to set parameters related to serial port 1~2.
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Serial Port 1 Configuration
Serial Port
Enable or disable serial port 1. The optimal setting for base I/O address is 3F8h and for interrupt request address is IRQ4.
COM Port Type
Use this option to set RS-232/422/485 mode.
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Serial Port 2 Configuration
Serial Port
Enable or disable serial port 2. The optimal setting for base I/O address is 2F8h and for interrupt request address is IRQ3.
COM Port Type
Use this option to set RS-232/422/485 mode.
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F81801 H/W Monitor
This screen monitors hardware health status.
This screen displays the temperature of system and CPU, system voltages (VCORE and
+5V).
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CPU Configuration
This screen shows the CPU Configuration.
Socket 0 CPU Information
This item is for CPU information.
Intel Virtualization Technology
Enable or disable Intel Virtualization Technology. When enabled, a Virtual Machine Mode can utilize the additional hardware capabilities. It allows a platform to run multiple operating systems and applications independently, hence enabling a single computer system to work as several virtual systems.
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Socket 0 CPU Information
This screen shows CPU information.
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IDE Configuration
In the IDE Configuration menu, you can see the currently installed hardware in the SATA ports. During system boot up, the BIOS automatically detects the presence of SATA devices.
Serial-ATA (SATA)
Enable or disable the SATA Controller feature. The default is Enabled.
SATA Mode
Determine how SATA controller(s) operate. Operation mode options are IDE Mode and
AHCI (Advanced Host Controller Interface) Mode. The default is AHCI Mode.
Serial-ATA Port 0~1
Enable or disable the onboard SATA port 0~1.
MiniCard Switch
This option appears only after SATA Port 1 is enabled. The default is PCIE. If you need to insert mSATA card to SCN1 (see section 2.5.15), please change setting to mSATA.
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Trusted Computing
This screen provides function for specifying the TPM settings.
Security Device Support
Enable or disable BIOS support for security device. The default setting is Disabled.
TPM State
Once the Security Device Support is Enabled, TPM can be used by the operating system.
Current Status Information
Display current TPM status information.
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USB Configuration
USB Devices
Display all detected USB devices.
Legacy USB Support
Enable or disable support for USB device on legacy operating system. The default setting is Enabled. Auto option disables legacy support if no USB devices are connected. Disable option will keep USB devices available only for EFI applications.
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5.5 Chipset Menu
The Chipset menu allows users to change the advanced chipset settings. You can select any of the items in the left frame of the screen to go to the sub menus:
►
North Bridge
►
South Bridge
For items marked with “”, please press <Enter> for more options.
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North Bridge
This screen allows users to configure parameters of North Bridge chipset.
LVDS Panel Type
Select LVDS panel resolution.
Memory Information
Show the information related to system memory.
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South Bridge
This screen allows users to configure parameters of South Bridge chipset.
Audio Controller
Control detection of the Audio device.
Disabled - Audio will be unconditionally disabled.
Enabled - Audio will be unconditionally enabled.
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5.6 Security Menu
The Security menu allows users to change the security settings for the system.
Administrator Password
Set administrator password.
User Password
Set user password.
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5.7 Boot Menu
The Boot menu allows users to change boot options of the system.
Bootup NumLock State
Use this item to select the power-on state for the keyboard NumLock.
Setup Prompt Timeout
Number of seconds to wait for setup activation key. 65535(0xFFFF) means indefinite waiting.
Quiet Boot
Select to display either POST output messages or a splash screen during boot-up.
Launch PXE OpROM
Enable or disable the Preboot eXecution Environment (PXE) boot ROM function of the onboard LAN chip during system boots up.
Boot Option Priorities
These are settings for boot priority. Specify the boot device priority sequence from the available devices.
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5.8 Save & Exit Menu
The Save & Exit menu allows users to load your system configuration with optimal or fail-safe default values.
Save Changes and Exit
When you have completed the system configuration changes, select this option to leave
Setup and return to Main Menu. Select Save Changes and Exit from the Save & Exit menu and press <Enter>. Select Yes to save changes and exit.
Discard Changes and Exit
Select this option to quit Setup without making any permanent changes to the system configuration and return to Main Menu. Select Discard Changes and Exit from the Save &
Exit menu and press <Enter>. Select Yes to discard changes and exit.
Save Changes and Reset
When you have completed the system configuration changes, select this option to leave
Setup and reboot the computer so the new system configuration parameters can take effect. Select Save Changes and Reset from the Save & Exit menu and press <Enter>.
Select Yes to save changes and reset.
Discard Changes and Reset
Select this option to quit Setup without making any permanent changes to the system configuration and reboot the computer. Select Discard Changes and Reset from the Save
& Exit menu and press <Enter>. Select Yes to discard changes and reset.
Save Changes
When you have completed the system configuration changes, select this option to save changes. Select Save Changes from the Save & Exit menu and press <Enter>. Select Yes to save changes.
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Discard Changes
Select this option to quit Setup without making any permanent changes to the system configuration. Select Discard Changes from the Save & Exit menu and press <Enter>.
Select Yes to discard changes.
Restore Defaults
It automatically sets all Setup options to a complete set of default settings when you select this option. Select Restore Defaults from the Save & Exit menu and press <Enter>.
Save as User Defaults
Select this option to save system configuration changes done so far as User Defaults.
Select Save as User Defaults from the Save & Exit menu and press <Enter>.
Restore User Defaults
It automatically sets all Setup options to a complete set of User Defaults when you select this option. Select Restore User Defaults from the Save & Exit menu and press <Enter>.
Boot Override
Select a drive as boot device and bypass the current boot priority order.
Launch EFI Shell from filesystem device
Attempt to launch EFI Shell application (Shellx64.efi) from one of the available filesystem devices.
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Appendix A
Watchdog Timer
A.1 About Watchdog Timer
Software stability is major issue in most application. Some embedded systems are not watched by human for 24 hours. It is usually too slow to wait for someone to reboot when computer hangs. The systems need to be able to reset automatically when things go wrong.
The watchdog timer gives us solution.
The watchdog timer is a counter that triggers a system reset when it counts down to zero from a preset value. The software starts counter with an initial value and must reset it periodically. If the counter ever reaches zero which means the software has crashed, the system will reboot.
A.2 How to Use Watchdog Timer
The I/O port base addresses of watchdog timer are 2E (hex) and 2F (hex). The 2E (hex) and
2F (hex) are address and data port respectively.
Assume that program A is put in a loop that must execute at least once every 10ms. Initialize watchdog timer with a value bigger than 10ms. If the software has no problems; watchdog timer will never expire because software will always restart the counter before it reaches zero.
Begin Begin
Next Next
Enable and Initialize
Watchdog Timer
Next
Enable and Initialize
Watchdog Timer
Next
Program “A”
Next
Disable Watchdog
Timer
Next
Program “A”
Next
Reset Watchdog
Timer
Next
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A.3 Sample Program
Assembly sample code :
;Enable WDT: mov mov out out
;Select Logic device: mov mov out mov dx,2Eh al,87 dx,al dx,al
;Un-lock super I/O dx,2Eh al,07h dx,al dx,2Fh mov out al,07h dx,al
;Enable WDT base address: mov mov out mov dx,2Eh al,30h dx,al dx,2Fh mov out al,01h dx,al
;Activate WDT: mov mov out mov dx,2Eh al,0F0h dx,al dx,2Fh mov out al,80h dx,al
;Set base timer : mov mov out mov mov dx,2Eh al,0F6h dx,al dx,2Fh al,Mh ;M=00h,01h,...FFh (hex),Value=0 to 255 out dx,al
;Set Second or Minute : mov mov dx,2Eh al,0F5h out mov dx,al dx,2Fh
;(see below Note ) mov out al,Nh dx,al
;N=71h or 79h(see below Note )
Note:
If N=71h, the time base is set to second.
M = time value
00: Time-out Disable
01: Time-out occurs after 1 second
02: Time-out occurs after 2 seconds
03: Time-out occurs after 3 seconds
.
.
FFh: Time-out occurs after 255 seconds
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If N=79h, the time base is set to minute.
M = time value
00: Time-out Disable
01: Time-out occurs after 1 minute
02: Time-out occurs after 2 minutes
03: Time-out occurs after 3 minutes
.
.
FFh: Time-out occurs after 255 minutes
Watchdog Timer 61
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