Page 1
SDM300S
Intel® Smart Display Module (SDM-S)
with Intel® Pentium® Processor N4200
and Celeron® Processor N3350
User’s Manual
Page 2
ii
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 2018 Axiomtek Co., Ltd.
All Rights Reserved
August 2018, Version A1
Printed in Taiwan
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iii
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 modules or integrated circuits from their anti-static packaging until you are
ready to install them.
Before holding the module 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 modules 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®, 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 ............................................................................................... 1
1.2 Specifications ...................................................................................... 2
1.3 Utilities Supported .............................................................................. 3
Chapter 2 Module and Pin Assignments .................. 5
2.1 Module Dimensions and Fixing Holes ............................................... 5
2.2 Module Layout ..................................................................................... 7
2.3 Jumper Settings .................................................................................. 9
2.3.1 Auto Power On (JP1) .................................................................................. 9
2.4 Connectors ........................................................................................ 10
2.4.1 USB 3.0 Port (CN2) ................................................................................... 10
2.4.2 Ethernet Port (LAN1) .................................................................................. 11
2.4.3 M.2 E Key 2230 Socket (NGFF1) ............................................................. 12
2.4.4 Power and Reset Button (SW1) ................................................................ 13
2.4.5 SDM Edge Connector (SJ1) ...................................................................... 14
Chapter 3 Hardware Description ........................... 15
3.1 Microprocessor ................................................................................. 15
3.2 BIOS ................................................................................................... 15
3.3 System Memory ................................................................................. 15
3.4 I/O Port Address Map ........................................................................ 16
3.5 Interrupt Controller (IRQ) Map ......................................................... 17
3.6 Memory Map ...................................................................................... 22
Chapter 4 AMI BIOS Setup Utility .......................... 23
4.1 Starting ............................................................................................... 23
4.2 Navigation Keys ................................................................................ 23
4.3 Main Menu .......................................................................................... 25
4.4 Advanced Menu ................................................................................. 26
4.5 Chipset Menu ..................................................................................... 35
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4.6 Security Menu .................................................................................... 39
4.7 Boot Menu .......................................................................................... 40
4.8 Save & Exit Menu .............................................................................. 41
Appendix A Watchdog Timer ................................... 43
A.1 About Watchdog Timer ..................................................................... 43
A.2 How to Use Watchdog Timer ............................................................ 43
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Intel® Smart Display Module (SDM-S) SDM300S
Introduction 1
Chapter 1
Introduction
The SDM300S is a new Intel® Smart Display Module (SDM-S) supporting Intel® Pentium® quad
core N4200 and Celeron® dual core N3350. It delivers outstanding system performance and
support excellent multiple I/Os such as one Gigabyte Ethernet port and two USB 3.0 ports.
SDM300S measures only 100 x 60mm and delivers 4K output with streaming content thru the
SDM edge connector.
The smart display module carries 4/8GB LPDDR4 onboard memory and 32/64GB eMMC
onboard flash. The cost-effective SDM300S features one standard PCIe (thru SDM edge
connector) and one M.2 E Key 2230 slot for WiFi/BT option. It also features built-in I/O such as
USB 3.0, HDMI 1.4, DisplayPort 1.2, Serial TX/RX and I2C. In addition SDM300S can be built
in or externally plugged into a display for maximum integration flexibility to fit into the sleekest
all-in-one designs
1.1 Features
Intel
®
Pentium® N4200 and Celeron® N3350 processors
4GB LPDDR4 onboard memory supporting up to 8GB memory capacity
32/64GB eMMC onboard flash
One M.2 E Key 2230 for WiFi/BT options
2 USB 3.0, one GbE LAN
Easily integrates into slim designs
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Intel® Smart Display Module (SDM-S) SDM300S
2 Introduction
1.2 Specifications
CPU
Intel
®
Pentium® quad core N4200 1.10~2.5GHz.
Intel
®
Celeron® dual core N3350 1.10~2.4GHz.
BIOS
American Megatrends Inc. BIOS.
64Mbit SPI Flash, DMI, Plug and Play.
PXE Ethernet Boot ROM, customized default saving features, LPC-free supported,
uses SPI type Flash memory.
System Memory
4GB LPDDR4 2133MHz onboard memory supporting maximum capacity up to 8GB
(optional).
eMMC
Support 32/64GB eMMC 5.0 onboard flash.
Expansion Interface
One M.2 E Key 2230 socket for Wi-Fi/Bluetooth option.
USB Interface
Two USB 3.0 ports in Type A on the rear I/O.
One USB 3.0 port (thru SDM edge connector).
Graphics
Integrated in processor HD graphics 505/500.
One DP 1.2 (thru SDM edge connector). The resolution is up to 4096x2160.
One HDMI 1.4b (thru SDM edge connector). The resolution is up to 3840x2160.
Ethernet
One 1000/100/10 Base-T provided by Intel
®
I211AT with integrated boot ROM.
WatchDog Timer
Timeout value range is 1~255 sec/min.
SDM Edge Connector
98-pin golden finger; containing DP, HDMI, PCI Express x1, USB 3.0, Serial TX/RX,
I2C and SPI.
Power Management
ACPI (Advanced Configuration and Power Interface).
Form Factor
100mm x 60mm.
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Intel® Smart Display Module (SDM-S) SDM300S
Introduction 3
1.3 Utilities Supported
Chipset driver
Graphics driver
TXE driver
Serial IO driver
Ethernet utility and driver
Note
All specifications and images are subject to change without notice.
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Intel® Smart Display Module (SDM-S) SDM300S
4 Introduction
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Intel® Smart Display Module (SDM-S) SDM300S
Module and Pin Assignments 5
Chapter 2
Module and Pin Assignments
2.1 Module Dimensions and Fixing Holes
Top View
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Intel® Smart Display Module (SDM-S) SDM300S
6 Module and Pin Assignments
Bottom View
Side View
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Intel® Smart Display Module (SDM-S) SDM300S
Module and Pin Assignments 7
2.2 Module Layout
Top View
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Intel® Smart Display Module (SDM-S) SDM300S
8 Module and Pin Assignments
Bottom View
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Intel® Smart Display Module (SDM-S) SDM300S
Module and Pin Assignments 9
2.3 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 SDM300S to meet your application purpose. Below
you can find a summary table of jumper 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
Auto Power On
Default: Enable
1-2 Close
2.3.1 Auto Power On (JP1)
If JP1 is enabled for power input, the system will be automatically power on without
pressing soft power button. If JP1 is disabled for power input, it is necessary to manually
press soft power button to power on the system.
Function
Setting
Enable auto power on (Default)
1-2 close
Disable auto power on
2-3 close
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Intel® Smart Display Module (SDM-S) SDM300S
10 Module and Pin Assignments
2.4 Connectors
Signals go to the 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 connectors on the hardware.
Connector
Description
CN2
USB 3.0 Port 0~1
LAN1
Ethernet Port
NGFF1
M.2 E Key 2230 Socket
SW1
Power and Reset Button
SJ1
SDM Edge Connector
2.4.1 USB 3.0 Port (CN2)
The Universal Serial Bus (compliant with USB 3.0 (5Gb/s)) connector on the rear I/O is
for installing USB peripherals such as keyboard, mouse, scanner, etc.
Pin
Signal
Pin
Signal
1
USB_VCC (+5V )
10
USB_VCC (+5V )
2
USB #0_D-
11
USB #1_D-
3
USB #0_D+
12
USB #1_D+
4
GND
13
GND
5
SSRX0-
14
SSRX1-
6
SSRX0+
15
SSRX1+
7
GND
16
GND
8
SSTX0-
17
SSTX1-
9
SSTX0+
18
SSTX1+
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Intel® Smart Display Module (SDM-S) SDM300S
Module and Pin Assignments 11
2.4.2 Ethernet Port (LAN1)
The board has one RJ-45 Ethernet connector, LAN1. 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
1000
Base-T
100/10
Base-T
Description
L1
BI_DA+
TX+
Bidirectional or Transmit Data+
L2
BI_DA-
TX-
Bidirectional or Transmit Data-
L3
BI_DB+
RX+
Bidirectional or Receive Data+
L4
BI_DC+
N.C.
Bidirectional or Not Connected
L5
BI_DC-
N.C.
Bidirectional or Not Connected
L6
BI_DB-
RX-
Bidirectional or Receive Data-
L7
BI_DD+
N.C.
Bidirectional or Not Connected
L8
BI_DD-
N.C.
Bidirectional or Not Connected
B
Active Link LED (Yellow)
Off: No link
Blinking: Data activity detected
A
Speed LED
1000: Orange
100/10: Green/OFF
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Intel® Smart Display Module (SDM-S) SDM300S
12 Module and Pin Assignments
2.4.3 M.2 E Key 2230 Socket (NGFF1)
The module has one M.2 E Key 2230 socket on the top side supporting PCI Express x1
and USB 2.0.
Pin
Signal
Pin
Signal
1
GND
2
3.3V 3 USB_D+
4
3.3V 5 USB_D-
6
NC 7 GND
8
I2S_SCL
9
NC
10
I2S_WS
11
NC
12
I2S_SD_OUT
13
NC
14
I2S_SD_IN
15
NC
16
NC
17
NC
18
GND
19
NC
20
WAKE#
21
NC
22
NC
23
NC
24
NC
25
NC
26
NC
27
NC
28
NC
29
NC
30
NC
31
NC
32
NC
33
GND
34
NC
35
PETP0
36
NC
37
PETN0
38
NC
39
GND
40
NC
41
PERP0
42
NC
43
PERN0
44
NC
45
GND
46
NC
47
REFCLKPP
48
NC
49
REFCLKPN
50
SUSCLK
51
GND
52
RST
53
PCIE_CLKREQ
54
NC
55
PEWAKE#
56
NC
57
GND
58
NC
59
NC
60
NC
61
NC
62
NC
63
GND
64
NC
65
NC
66
NC
67
NC
68
NC
69
GND
70
NC
71
NC
72
3.3V
73
NC
74
3.3V
75
GND
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Intel® Smart Display Module (SDM-S) SDM300S
Module and Pin Assignments 13
2.4.4 Power and Reset Button (SW1)
The upper power button allows users to control SDM300S power on/off. And the lower
reset button allows users to reset SDM300S during system abnormal situation.
Power Button
Description
Press
Turn on/off system
Release
Keep system status
Reset Button
Description
Press
Reset system
Release
Keep system status
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Intel® Smart Display Module (SDM-S) SDM300S
14 Module and Pin Assignments
2.4.5 SDM Edge Connector (SJ1)
The following table shows pin assignments of the 98-pin SDM PCIEx8 edge connector.
Pin
Side B (Top)
Pin
Side A (Bottom)
1
+12V 1 +12V
2
+12V 2 +12V
3
+3.3VSB
3
+12V
4
GND 4 GND
5
GND 5 GND 6 PWRBTN#
6
PWRGD#
7
RESET#
7
SLP_S4
8
SYSFAN#
8
SDM_DET#
9
GND 9 CEC/NC
10
I2C1_SDA
10
I2C0_SDA
11
I2C1_SCL
11
I2C0_SCL
12
GSPI_MOSI
12
GSPI_CLK
13
GSPI_MISO
13
GSPI_CS0#
14
GND
14
GND
15
UART_TXD
15
PCIe_TX+
16
UART_RXD
16
PCIe_TX-
17
GND
17
GND
18
USB_SSTX+
18
PCIe_RX+
19
USB_SSTX-
19
PCIe_RX-
20
GND
20
GND
21
USB_SSRX+
21
PCIe_Clk+
22
USB_SSRX-
22
PCIe_Clk-
23
GND
23
GND
24
USB+
24
PCIE_WAKE#
25
USB-
25
PCIE_CLKREQ#
26
USB_OC#
26
PCIE_RST#
27
GND
27
GND
28
DP3-
28
TMDS_CLK-
29
DP3+
29
TMDS_CLK+
30
GND
30
GND
31
DP2-
31
TMDS0-
32
DP+
32
TMDS0+
33
GND
33
GND
34
DP1-
34
TMDS1-
35
DP1+
35
TMDS1+
36
GND
36
GND
37
DP0-
37
TMDS2-
38
DP0+
38
TMDS2+
39
GND
39
GND
40
DP_AUX-
40
DDC_DATA
41
DP_AUX+
41
DDC_CLK
42
DP_HPD
42
TMDS_HPD
43
GND
43
GND
44
RSVD
44
RSVD
45
RSVD
45
RSVD
46
RSVD
46
RSVD
47
RSVD
47
RSVD
48
RSVD
48
RSVD
49
RSVD
49
RSVD
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Intel® Smart Display Module (SDM-S) SDM300S
Hardware Description 15
Chapter 3
Hardware Description
3.1 Microprocessor
The SMD300S supports Intel® Pentium® N4200 and Celeron® N3350 processors which enable
your system to operate under Windows® 10 and Linux environments. The system performance
depends on the microprocessor. Make sure all correct settings are arranged for the installed
microprocessor to prevent the CPU from damages.
3.2 BIOS
The SDM300S uses AMI Plug and Play BIOS with a single 64Mbit SPI Flash.
3.3 System Memory
By default, the SDM300S comes with 4GB LPDDR4 onboard memory. It supports maximum
memory capacities up to 8GB.
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Intel® Smart Display Module (SDM-S) SDM300S
16 Hardware Description
3.4 I/O Port Address Map
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Intel® Smart Display Module (SDM-S) SDM300S
Hardware Description 17
3.5 Interrupt Controller (IRQ) Map
The interrupt controller (IRQ) mapping list is shown as follows:
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Intel® Smart Display Module (SDM-S) SDM300S
18 Hardware Description
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Intel® Smart Display Module (SDM-S) SDM300S
Hardware Description 19
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Intel® Smart Display Module (SDM-S) SDM300S
20 Hardware Description
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Intel® Smart Display Module (SDM-S) SDM300S
Hardware Description 21
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Intel® Smart Display Module (SDM-S) SDM300S
22 Hardware Description
3.6 Memory Map
The memory mapping list is shown as follows:
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Intel® Smart Display Module (SDM-S) SDM300S
AMI BIOS Setup Utility 23
Chapter 4
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.
4.1 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.
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.
4.2 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.
Note
Some of the navigation keys differ from one screen to another.
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Intel® Smart Display Module (SDM-S) SDM300S
24 AMI BIOS Setup Utility
Hot Keys
Description
Left/Right
The Left and Right <Arrow> keys allow you to select a setup screen.
Up/Down
The Up and Down <Arrow> keys allow you to select a setup screen or
sub-screen.
+ Plus/Minus
The Plus and Minus <Arrow> keys allow you to change the field value of a
particular setup item.
Tab
The <Tab> key allows you to select setup fields.
F1
The <F1> key allows you to display the General Help screen.
F2
The <F2> key allows you to Load Previous Values.
F3
The <F3> key allows you to Load Optimized Defaults.
F4
The <F4> key allows you to save any changes you have made and exit Setup.
Press the <F4> key to save your changes.
Esc
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.
Enter
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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Intel® Smart Display Module (SDM-S) SDM300S
AMI BIOS Setup Utility 25
4.3 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 BIOS and EC firmware information.
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.
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Intel® Smart Display Module (SDM-S) SDM300S
26 AMI BIOS Setup Utility
4.4 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:
► Trusted Computing
► ACPI Settings
► NCT5104D Super IO Configuration
► CPU Configuration
► Network Stack Configuration
► CSM Configuration
► USB Configuration
For items marked with “”, please press <Enter> for more options.
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Intel® Smart Display Module (SDM-S) SDM300S
AMI BIOS Setup Utility 27
Trusted Computing
You can use this screen for TPM (Trusted Platform Module) configuration. It also shows
current TPM status information.
Security Device Support
Enable or disable BIOS support for security device.
Pending operation
Schedule a TPM operation which will take effect at the next bootup process.
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Intel® Smart Display Module (SDM-S) SDM300S
28 AMI BIOS Setup Utility
ACPI Settings
You can use this screen to select options for system ACPI configuration, and change the
value of the selected option. A description of the selected item appears on the right side of
the screen.
Enable Hibernation
Enable or disable system ability to hibernate mode.
ACPI Sleep State
Select the ACPI (Advanced Configuration and Power Interface) sleep state. Configuration
options are Suspend Disabled and S3 (Suspend to RAM). The S3 (Suspend to RAM)
option selects ACPI sleep state the system will enter when suspend button is pressed.
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Intel® Smart Display Module (SDM-S) SDM300S
AMI BIOS Setup Utility 29
NCT5104D Super IO Configuration
You can use this screen to select options for the Serial Port 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 Configuration
Serial Port
Enable or disable serial port 1. The optimal setting for base I/O address is 3F8h and for
interrupt request line is IRQ4.
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Intel® Smart Display Module (SDM-S) SDM300S
30 AMI BIOS Setup Utility
CPU Configuration
This screen shows the CPU Configuration, and you can change the value of the selected
option.
Socket 0 CPU Information
This screen shows the CPU information.
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Intel® Smart Display Module (SDM-S) SDM300S
AMI BIOS Setup Utility 31
CPU Power Management Configuration
EIST
Enable or disable Intel SpeedStep mode. The default setting is Enabled.
Turbo Mode
Enable or disable turbo mode. The default setting is Disabled.
C-states
Enable or disable C states. The default setting is Enabled.
Active Processor Cores
Enable or disable CPU cores. The default setting is Disabled.
Intel Virtualization Technology
Enable or disable Intel Virtualization Technology. When enabled, a VMM (Virtual Machine
Mode) can utilize the additional hardware capabilities. It allows a platform to run multiple
operating systems and applications independently, hence enabling a computer system to
work as several virtual systems.
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Intel® Smart Display Module (SDM-S) SDM300S
32 AMI BIOS Setup Utility
Network Stack Configuration
Network Stack
Enable or disable UEFI Network stack. The default setting is Disabled.
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Intel® Smart Display Module (SDM-S) SDM300S
AMI BIOS Setup Utility 33
CSM (Compatibility Support Module) Configuration
CSM Support
Enable or disable CSM support. The default setting is Enabled.
Boot optional filter
Controls the priority of Legacy and UEFI ROMs.
Network
Controls the execution of UEFI and Legacy PXE OpROM.
Video
Controls the execution of UEFI and Legacy Video OpROM.
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Intel® Smart Display Module (SDM-S) SDM300S
34 AMI BIOS Setup Utility
USB Configuration
USB Devices
Display all detected USB devices.
Legacy USB Support
Enable or disable legacy USB support.
USB Mass Storage Driver Support
Enable or disable USB mass storage driver support.
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Intel® Smart Display Module (SDM-S) SDM300S
AMI BIOS Setup Utility 35
4.5 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:
► South Cluster Configuration
For items marked with “”, please press <Enter> for more options.
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Intel® Smart Display Module (SDM-S) SDM300S
36 AMI BIOS Setup Utility
South Cluster Configuration
This screen shows South Cluster configuration. For items marked with “”, please press
<Enter> for more options.
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Intel® Smart Display Module (SDM-S) SDM300S
AMI BIOS Setup Utility 37
PCI Express Configuration
This screen shows PCI Express configuration. For items marked with “”, please press
<Enter> for more options.
PCIE Root Port5 (NGFF1)
Control PCIE root port5. The default setting is Enable.
ASPM
Control PCI Express active state power management settings.
PCIe Speed
Control PCIe speed.
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Intel® Smart Display Module (SDM-S) SDM300S
38 AMI BIOS Setup Utility
SCC eMMC Support (D28:F0)
Enable or disable eMMC support. The default setting is Enable.
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Intel® Smart Display Module (SDM-S) SDM300S
AMI BIOS Setup Utility 39
4.6 Security Menu
The Security menu allows users to change the security settings for the system.
Setup Administrator Password
Set setup administrator password.
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Intel® Smart Display Module (SDM-S) SDM300S
40 AMI BIOS Setup Utility
4.7 Boot Menu
The Boot menu allows users to change boot options of the system.
Setup Prompt Timeout
Number of seconds to wait for setup activation key. 65535(0xFFFF) means indefinite
waiting.
Bootup NumLock State
Use this item to select the power-on state for the keyboard NumLock.
Quiet Boot
Select to display either POST output messages or a splash screen during boot up.
Boot Option Priorities [Boot Option #1]
These are settings for boot priority. Specify the boot device priority sequence from the
available devices.
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Intel® Smart Display Module (SDM-S) SDM300S
AMI BIOS Setup Utility 41
4.8 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 continue to boot to operating system. 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 continue to boot to operating system. 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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Intel® Smart Display Module (SDM-S) SDM300S
42 AMI BIOS Setup Utility
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 to immediately boot that device regardless of the current boot order.
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Intel® Smart Display Module (SDM-S) SDM300S
WatchDog Timer 43
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
Start
Un-Lock WDT:
O 2E 87 ; Un-lock super I/O
O 2E 87 ; Un-lock super I/O
Select Logic device:
O 2E 07
O 2F 08
Enable WDT:
O 2E 30
O 2F 01
Set Second or Minute:
O 2E F0
O 2F N ; N=00 or 08 (See Note below)
WDT counting re-set timer:
O 2E F1
O 2F M ; M=00,01,02,…FF (See Note below)
;IF to disable WDT:
O 2E 30
O 2F 00 ; Can be disabled at any time
Timeout Value Range
1 to 255
Minute / Second
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Intel® Smart Display Module (SDM-S) SDM300S
44 WatchDog Timer
Note:
If N=00h, the time base is set to second.
M = time value
00h: Time-out Disable
01h: Time-out occurs after 1 second
02h: Time-out occurs after 2 seconds
03h: Time-out occurs after 3 seconds
.
.
FFh: Time-out occurs after 255 seconds
If N=08h, the time base is set to minute.
M = time value
00h: Time-out Disable
01h: Time-out occurs after 1 minute
02h: Time-out occurs after 2 minutes
03h: Time-out occurs after 3 minutes
.
.
FFh: Time-out occurs after 255 minutes
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