Asus AAEON PICO-EHL4-SEMI User manual

Last Updated: July 27, 2023
PICO-EHL4-SEMI
PICO-SEMI System
User’s Manual 1st Ed

Preface II
PICO-SEMI System PICO-EHL4-SEMI
Copyright Notice
This document is copyrighted, 2023. All rights are reserved. The original manufacturer
reserves the right to make improvements to the products described in this manual at
any time without notice.
No part of this manual may be reproduced, copied, translated, or transmitted in any
form or by any means without the prior written permission of the original
manufacturer. Information provided in this manual is intended to be accurate and
reliable. However, the original manufacturer assumes no responsibility for its use, or for
any infringements upon the rights of third parties that may result from its use.
The material in this document is for product information only and is subject to change
without notice. While reasonable efforts have been made in the preparation of this
document to assure its accuracy, AAEON assumes no liabilities resulting from errors or
omissions in this document, or from the use of the information contained herein.
AAEON reserves the right to make changes in the product design without notice to its
users.

Preface III
PICO-SEMI System PICO-EHL4-SEMI
Acknowledgement
All other products’ name or trademarks are properties of their respective owners.
⚫Microsoft Windows® is a registered trademark of Microsoft Corp.
⚫Intel®, Atom®, Celeron® are registered trademarks of Intel Corporation
⚫ITE is a trademark of Integrated Technology Express, Inc.
⚫IBM, PC/AT, PS/2, and VGA are trademarks of International Business Machines
Corporation.
⚫Ubuntu and Canonical are registered trademarks of Canonical Ltd.
All other product names or trademarks are properties of their respective owners.
Omission of a product name from this list does not imply any claim to ownership by the
publisher of this document.

Preface IV
PICO-SEMI System PICO-EHL4-SEMI
Packing List
Before setting up your product, please make sure the following items have been
shipped:
Item
Quantity
⚫PICO-EHL4-SEMI
1
If any of these items are missing or damaged, please contact your distributor or sales
representative immediately.

Preface V
PICO-SEMI System PICO-EHL4-SEMI
About this Document
This User’s Manual contains all the essential information, such as detailed descriptions
and explanations on the product’s hardware and software features (if any), its
specifications, dimensions, jumper/connector settings/definitions, and driver installation
instructions (if any), to facilitate users in setting up their product.
Users may refer to the product page on AAEON.com for the latest version of this
document.

Preface VI
PICO-SEMI System PICO-EHL4-SEMI
Safety Precautions
Please read the following safety instructions carefully. It is advised that you keep this
manual for future references
1. All cautions and warnings on the device should be noted.
2. Make sure the power source matches the power rating of the device.
3. Position the power cord so that people cannot step on it. Do not place anything
over the power cord.
4. Always completely disconnect the power before working on the system’s
hardware.
5. No connections should be made when the system is powered as a sudden rush
of power may damage sensitive electronic components.
6. If the device is not to be used for a long time, disconnect it from the power
supply to avoid damage by transient over-voltage.
7. Always disconnect this device from any AC supply before cleaning.
8. While cleaning, use a damp cloth instead of liquid or spray detergents.
9. Make sure the device is installed near a power outlet and is easily accessible.
10. Keep this device away from humidity.
11. Place the device on a solid surface during installation to prevent falls
12. Do not cover the openings on the device to ensure optimal heat dissipation.
13. Watch out for high temperatures when the system is running.
14. Do not touch the heat sink or heat spreader when the system is running
15. Never pour any liquid into the openings. This could cause fire or electric shock.
16. As most electronic components are sensitive to static electrical charge, be sure to
ground yourself to prevent static charge when installing the internal components.
Use a grounding wrist strap and contain all electronic components in any
static-shielded containers.

Preface VII
PICO-SEMI System PICO-EHL4-SEMI
17. If any of the following situations arises, please the contact our service personnel:
i. Damaged power cord or plug
ii. Liquid intrusion to the device
iii. Exposure to moisture
iv. Device is not working as expected or in a manner as described in
this manual
v. The device is dropped or damaged
vi. Any obvious signs of damage displayed on the device
18. DO NOT LEAVE THIS DEVICE IN AN UNCONTROLLED ENVIRONMENT WHERE
THE STORAGE TEMPERATURE IS BELOW -20° C (-4°F) OR ABOVE 60°C (140°F)
TO PREVENT DAMAGE.

Preface VIII
PICO-SEMI System PICO-EHL4-SEMI
FCC Statement
This device complies with Part 15 FCC Rules. Operation is
subject to the following two conditions: (1) this device may not
cause harmful interference, and (2) this device must accept any
interference received including interference that may cause
undesired operation.
Caution:
There is a danger of explosion if the battery is incorrectly replaced. Replace only with the
same or equivalent type recommended by the manufacturer. Dispose of used batteries
according to the manufacturer’s instructions and your local government’s recycling or
disposal directives.
Attention:
Il y a un risque d’explosion si la batterie est remplacée de façon incorrecte.
Ne la remplacer qu’avec le même modèle ou équivalent recommandé par le constructeur.
Recycler les batteries usées en accord avec les instructions du fabricant et les directives
gouvernementales de recyclage.

Preface IX
PICO-SEMI System PICO-EHL4-SEMI
China RoHS Requirements (CN)
产品中有毒有害物质或元素名称及含量
AAEON System QO4-381 Rev.A0
部件名称
有毒有害物质或元素
铅
(Pb)
汞
(Hg)
镉
(Cd)
六价铬
(Cr(VI))
多溴联苯
(PBB)
多溴二苯醚
(PBDE)
印刷电路板
及其电子组件
×
○
○
○
○
○
外部信号
连接器及线材
×
○
○
○
○
○
外壳
○
○
○
○
○
○
中央处理器
与内存
×
○
○
○
○
○
硬盘
×
○
○
○
○
○
液晶模块
×
○
○
○
○
○
光驱
×
○
○
○
○
○
触控模块
×
○
○
○
○
○
电源
×
○
○
○
○
○
电池
×
○
○
○
○
○
本表格依据 SJ/T 11364 的规定编制。
○ ：表示该有毒有害物质在该部件所有均质材料中的含量均在
GB/T 26572标准规定的限量要求以下。
×：表示该有害物质的某一均质材料超出了GB/T 26572的限量要求，然而该部件
仍符合欧盟指令2011/65/EU 的规范。
备注：
一、此产品所标示之环保使用期限，系指在一般正常使用状况下。
二、上述部件物质中央处理器、内存、硬盘、光驱、电源为选购品。
三、上述部件物质液晶模块、触控模块仅一体机产品适用。

Preface X
PICO-SEMI System PICO-EHL4-SEMI
China RoHS Requirement (EN)
Hazardous and Toxic Materials List
AAEON System QO4-381 Rev.A0
Component
Name
Hazardous or Toxic Materials or Elements
Lead (Pb)
Mercury (Hg)
Cadmium (Cd)
Hexavalent Chromium (Cr(VI))
Polybrominat ed biphenyls (PBBs)
Polybrominat ed diphenyl ethers (PBDEs)
PCB and
Components
X
O
O
O
O
O
Wires &
Connectors for
Ext.Connections
X
O
O
O
O
O
Chassis
O
O
O
O
O
O
CPU & RAM
X
O
O
O
O
O
HDD Drive
X
O
O
O
O
O
LCD Module
X
O
O
O
O
O
Optical Drive
X
O
O
O
O
O
Touch Control
Module
X
O
O
O
O
O
PSU
X
O
O
O
O
O
Battery
X
O
O
O
O
O
This form is prepared in compliance with the provisions of SJ/T 11364.
O: The level of toxic or hazardous materials present in this component and its parts
is below the limit specified by GB/T 26572.
X: The level of toxic of hazardous materials present in the component exceed the
limits specified by GB/T 26572, but is still in compliance with EU Directive 2011/65/EU
(RoHS 2).
Notes:
1. The Environment Friendly Use Period indicated by labelling on this product is
applicable only to use under normal conditions.
2. Individual components including the CPU, RAM/memory, HDD, optical drive, and
PSU are optional.
3. LCD Module and Touch Control Module only applies to certain products which
feature these components.

Preface XI
PICO-SEMI System PICO-EHL4-SEMI
Table of Contents
Chapter 1 - Product Specifications.......................................................................................... 1
1.1 Specifications............................................................................................................ 2
1.2 Function Block Diagram......................................................................................... 5
Chapter 2 –Hardware Information ....................................................................................... 6
2.1 Dimensions ............................................................................................................... 7
2.2 Jumpers and Connectors.......................................................................................9
2.3 List of Jumpers ........................................................................................................10
2.3.1 Clear CMOS Jumper & Auto Power Button Enable/Disable (JP1) .............10
2.4 List of Connectors................................................................................................... 11
2.4.1 RTC Battery Connector (CN1) ...........................................................................12
2.4.2 HDMI Port (CN4) .................................................................................................12
2.4.3 Dual RJ-45 (CN5).................................................................................................14
2.4.4 USB 2.0/USB 3.2 Gen 2 Port 1 ~ Port 2 (CN9)...............................................15
2.4.5 mSATA/Mini Card Slot (CN11)............................................................................17
2.4.6 M.2 2230 E-Key Slot (CN12) ..............................................................................19
2.4.7 Dual COM Port Header (CN15) .......................................................................22
2.4.8 SPI Port (CN17)....................................................................................................23
2.4.9 Power Input +12V (CN20).................................................................................24
2.4.10 Front Panel (CN21)..............................................................................................24
2.4.11 DC Jack Power Input [Reserved] (CN22) .......................................................25
Chapter 3 - AMI BIOS Setup ................................................................................................ 26
3.1 System Test and Initialization ..............................................................................27
3.2 AMI BIOS Setup .....................................................................................................28
3.3 Setup Submenu: Main..........................................................................................29
3.4 Setup Submenu: Advanced.................................................................................30
3.4.1 CPU Configuration ..............................................................................................31

Preface XII
PICO-SEMI System PICO-EHL4-SEMI
3.4.2 PCH-FW Configuration .....................................................................................32
3.4.2.1 Firmware Update Configuration.............................................................33
3.4.3 PTT Configuration ..............................................................................................34
3.4.4 Trusted Computing.............................................................................................35
3.4.5 SATA Configuration ............................................................................................37
3.4.6 SDIO Configuration............................................................................................38
3.4.7 Hardware Monitor..............................................................................................39
3.4.8 SIO Configuration...............................................................................................40
3.4.8.1 Serial Port Configuration...........................................................................41
3.4.9 AAEON BIOS Robot...........................................................................................42
3.4.10 Power Management...........................................................................................44
3.5 Setup Submenu: Chipset .....................................................................................45
3.5.1 System Agent (SA) Configuration ...................................................................46
3.5.1.1 Memory Configuration.............................................................................47
3.5.1.2 Graphics Configuration ............................................................................48
3.5.2 PCH-IO Configuration.......................................................................................49
3.6 Setup Submenu: Security.....................................................................................50
3.6.1 Secure Boot...........................................................................................................51
3.6.1.1 Key Management.......................................................................................52
3.7 Setup Submenu: Boot ..........................................................................................54
3.8 Setup Submenu: Save & Exit...............................................................................55
Chapter 4 –Drivers Installation............................................................................................ 56
4.1 Drivers Download and Installation.....................................................................57
Appendix A –Mating Connectors ....................................................................................... 59
A.1 List of Mating Connectors and Cables..............................................................60
Appendix B - I/O Information ...............................................................................................61
B.1 Direct Memory Access (DMA) Map...................................................................62
B.2 I/O Address Map ...................................................................................................63

Preface XIII
PICO-SEMI System PICO-EHL4-SEMI
B.3 IRQ Mapping Chart...............................................................................................64
B.4 Large Memory Map..............................................................................................75
B.5 Memory Address Map .........................................................................................76
Appendix C - Watchdog Timer Programming................................................................... 78
C.1 Introduction to Watchdog Timer .......................................................................79
C.2 Programing the Watchdog Timer with AAEON SDK.....................................80
C.3 Programing Watchdog Timer with AAEON Windows EAPI ..........................81
C.3.1 Watchdog Timer Functions ..............................................................................82
C.3.1.1 EapiWDogGetCap()...................................................................................82
C.3.1.2 EapiWDogStart() ........................................................................................83
C.3.1.3 EapiWDogTrigger()....................................................................................84
C.3.1.4 EapiWDogStop() ........................................................................................84
C.3.1.5 EapiWDogReloadTimer()..........................................................................85
C.3.1.6 EapiWDogGetStatus() ...............................................................................85
C.3.1.7 EapiWDogSetStatus()................................................................................86

PICO-SEMI System PICO-EHL4-SEMI
Chapter 1
Chapter 1 - Product Specifications

Chapter 1 –Product Specifications 2
PICO-SEMI System PICO-EHL4-SEMI
1.1 Specifications
System
Form Factor
PICO-SEMI
CPU
Intel® Pentium® and Celeron® N and J Series
Processors:
Intel® Celeron® Processor J6412
(4C/4T, 2.00 GHz, 10W)
Intel® Celeron® Processor N6210
(2C/2T, 1.20 GHz, 6.5W)
Chipset
Integrated with Intel® SoC
Memory Type
Onboard Single-Channel LPDDR4x 3200MHz,
(Non-ECC, Max. 16GB)
BIOS
UEFI
Wake on LAN
Yes
Watchdog Timer
255 Levels
Security
Intel® Platform Trust Technology (Intel® PTT)
(Integrated TPM)
RTC Battery
Lithium Battery 3V/240mAh
Dimensions
4.80” x 3.18” x 1.75” (122mm x 80.8mm x 44.4mm)
Gross Weight
0.88 lb. (0.40Kg)
OS Support
Windows® 10 (64-bit)
Ubuntu 20.04.3 (IoT)/Kernel 5.13
Power
Power Requirement
12V Only
Power Supply Type
ATX
Connector
DC Jack Connector

Chapter 1 –Product Specifications 3
PICO-SEMI System PICO-EHL4-SEMI
Power
Power Consumption
Intel Atom® x6425E, 16GB Onboard LPDDR4x, 2.48A
@+12V (Typical)
Intel Atom® x6425E, 16GB Onboard LPDDR4x, 2.62A
@+12V (Max)
Display
Controller
Intel® UHD Graphics for 10th Gen Intel® Processors
LVDS/eDP
-
Display Interface
HDMI 2.0 x 1, 3480 x 2160 @60Hz
Multiple Display
Up to 1 Display
Audio
Codec
-
Audio Interface
-
Speaker
-
External I/O
Ethernet
RTL8111H-CG 1GbE, RJ-45 x 2
USB
USB 3.2 Gen 2 x 2
Serial Port
COM 1, COM 2
(RS-232/422/485, supports 5V/12V/RI, Optional)
Video
HDMI 2.0 x 1
Internal I/O
USB
-
Serial Port
-
Video
-
SATA
32GB eMMC 5.1 (Optional: 64GB/128GB)

Chapter 1 –Product Specifications 4
PICO-SEMI System PICO-EHL4-SEMI
Internal I/O
Audio
-
DIO/GPIO
-
SMBus/I2C
-
Fan
-
Front Panel
HDD LED, PWR LED, Power Button, Buzzer, Reset
Others
-
Expansion
Mini PCIe/mSATA
Full Size mPCIe/mSATA x 1 (SATA as default, PCIe
selected by BIOS)
M.2
M.2 2230 E-Key x 1 (PCIe [x1]/USB 2.0)
Others
-
Environmental
Operating Temperature
32°F ~ 122°F (0°C ~ 50°C) with 0.5m/s air flow
Storage Temperature
-40°F ~ 185°F (-40°C ~ 85°C)
Operating Humidity
0% ~ 90% relative humidity, non-condensing
MTBF (Hours)
489,989
EMC
CE/FCC Class A

Chapter 1 –Product Specifications 5
PICO-SEMI System PICO-EHL4-SEMI
1.2 Function Block Diagram

PICO-SEMI System PICO-EHL4-SEMI
Chapter 2
Chapter 2 –Hardware Information

Chapter 2 –Hardware Information 7
PICO-SEMI System PICO-EHL4-SEMI
2.1 Dimensions
System