CEM842_843 User's Manual VA1_05-06-2015

CEM842/843
Intel® Celeron® J1900/N2807
Intel® AtomTM E3845 COM ExpressTM
Type 6 Compact Module
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
May 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 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.
iii
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
Installing Heatsink ............................................................................... 9
2.4
Switch Settings ................................................................................. 10
2.4.1
2.5
Auto Power On and Restore BIOS Optimal Defaults (SW1)..................... 10
Connectors ........................................................................................ 11
2.5.1
Chapter 3
COM Express
TM
Connectors (SS1 and SS2) ............................................. 11
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 ...................................................................................... 20
Chapter 4
AMI BIOS Setup Utility .......................... 21
4.1
Starting ............................................................................................... 21
4.2
Navigation Keys ................................................................................ 21
4.3
Main Menu.......................................................................................... 23
4.4
Advanced Menu ................................................................................. 24
4.5
Chipset Menu ..................................................................................... 37
4.6
Security Menu .................................................................................... 42
4.7
Boot Menu.......................................................................................... 43
4.8
Save & Exit Menu .............................................................................. 44
iv
Appendix A
BIOS Flash Utility ................................ 47
Appendix B
Watchdog Timer and GPIO .................. 51
B.1
About Watchdog Timer ..................................................................... 51
B.2
About GPIO ........................................................................................ 51
B.2
Sample Program ................................................................................ 51
v
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vi
CEM842/843 COM Express
TM
Type 6 Compact Module
Chapter 1
Introduction
TM
®
®
The CEM842 is a new COM Express Type 6 Compact Module supporting Intel Celeron
TM
quad/dual core J1900/N2807. Meanwhile, CEM843 is a new COM Express Type 6 Compact
®
TM
Module supporting Intel Atom quad core E3845. Both of them deliver outstanding system
performance and support excellent multiple I/Os like LVDS, one Gigabit Ethernet, HD Audio
interface, two SATA-300, one USB 3.0 and eight USB 2.0 ports to make all in one single
module as computing engine. For extension purpose, it provides maximum up to 6 lanes of
PCI-Express Gen 2 at 5GT/s.
1.1






Features
®
®
CEM842: Intel Celeron J1900/N2807 processors
®
TM
CEM843: Intel Atom E3845 processor
Two 204-pin SO-DIMMs supporting up to 8GB memory capacity
Support max. up to 6 lanes of PCI-Express
2 SATA-300
1 USB 3.0 and 8 USB 2.0 ports
Introduction
1
CEM842/843 COM Express
1.2

TM
Type 6 Compact Module
Specifications
CPU


CEM842
®
®
- Intel Celeron quad core J1900 2.0GHz
®
®
- Intel Celeron dual core N2807 1.58GHz
CEM843
®
TM
- Intel Atom quad core E3845 1.91GHz

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

Two 204-pin DDR3L 1333/1066MHz SO-DIMM sockets support maximum memory
capacity up to 8GB.
N2807 supports only one SO-DIMM socket (DIMM2).
Note

Expansion Interface

Six PCI-Express x1 or five PCI-Express x1 (while internal LAN is connected) routed
TM
through COM Express A_B connector.

USB Interface

One USB port complies with USB Spec. Rev. 3.0.

Eight USB ports comply with USB Spec. Rev. 2.0.
USB 2.0 port 4~7 do not support wake up function.
Note

SATA Interface
TM

Two SATA 3Gb/s ports supported through COM Express connector.

Graphics

Integrated in processor HD graphics Gen 7.

CRT interface supports up to 1920x1200.

18/24-bit dual channel LVDS interface.

One DDI interface support DVI/HDMI/DisplayPort.

Ethernet
®

CEM842 supports one 1000/100/10 Base-T provided by Intel I210AT with
integrated boot ROM.
®

CEM843 supports one 1000/100/10 Base-T provided by Intel I210IT with integrated
boot ROM.

Audio
®

Intel High Definition Audio interface.

Power Management

ACPI (Advanced Configuration and Power Interface).
2
Introduction
CEM842/843 COM Express

Type 6 Compact Module
Form Factor

Compact module 95mm x 95mm.
1.3






TM
Utilities Supported
Chipset driver
Graphics driver
Ethernet utility and driver
Trusted execution engine
Sideband fabric device
USB 3.0 driver
All specifications and images are subject to change without notice.
Note
Introduction
3
CEM842/843 COM Express
TM
Type 6 Compact Module
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4
Introduction
CEM842/843 COM Express
TM
Type 6 Compact Module
Chapter 2
Module and Pin Assignments
2.1
Module Dimensions and Fixing Holes
Top View
Module and Pin Assignments
5
CEM842/843 COM Express
TM
Type 6 Compact Module
Bottom View
6
Module and Pin Assignments
CEM842/843 COM Express
2.2
TM
Type 6 Compact Module
Module Layout
Top View
Module and Pin Assignments
7
CEM842/843 COM Express
TM
Type 6 Compact Module
Bottom View
8
Module and Pin Assignments
CEM842/843 COM Express
2.3
TM
Type 6 Compact Module
Installing Heatsink
For thermal dissipation, a thermal solution enables the CEM842/843’s components to dissipate
heat efficiently. All heat generating components are thermally conducted to the heatsink in
order to avoid hot spots. Figure below illustrates how to install the thermal solution on
CEM842/843.
1.
There is a protective plastic covering on the thermal pads. This must be removed before
the heatspreader can be mounted.
2.
Each thermal solution is designed for a specific CEM module. The thermal pads on the
heatspreader are designed to make contact with the necessary components on the CEM
module. When mounting the heatspreader you must make sure that the thermal pads on
the heatspreader make complete contact (no space between thermal pad and
component) with the corresponding components on the CEM module. This is especially
critical for CEM modules that have higher CPU speeds (for example 1.46GHz or more) to
ensure that the heatspreader acts as a proper thermal interface for cooling solutions.
3.
Before installing the heatspreader to the CPU module, please apply thermal grease on
the CPU die. This CPU module has four assembly holes for installing heatspreader plate.
Use the four screws to secure the heatspreader plate to the CEM842/843. Be careful not
to over-tighten the screws. Then, apply thermal grease at the bottom of heatsink and
secure the heatsink on the heatspreader by another four screws.
Module and Pin Assignments
9
CEM842/843 COM Express
2.4
TM
Type 6 Compact Module
Switch Settings
Properly configure switch settings on the CEM842/843 to meet your application purpose.
Below you can find a summary table of all switches and onboard default settings.
Once the default switch setting needs to be changed, please do it under power-off
condition.
Note
Switch
SW1
2.4.1
Description
Setting
Auto Power On
Default: Disable
SW1-1 OFF
Restore BIOS Optimal Defaults
Default: Normal Operation
SW1-2 OFF
Auto Power On and Restore BIOS Optimal Defaults (SW1)
If dip1 of SW1 (SW1-1) is set to ON position, the system will be automatically power on
without pressing soft power button. If this jumper is set to OFF position, it is necessary to
manually press soft power button to power on the system.
The dip2 of SW1 (SW1-2) is for restoring BIOS default status. Flip SW1-2 to ON position
for a few seconds then flip it back to OFF position. Doing this procedure can restore
BIOS optimal defaults.
10
Function
Setting
Disable auto power on (Default)
SW1-1 OFF
Enable auto power on
SW1-1 ON
Normal operation (Default)
SW1-2 OFF
Restore BIOS optimal defaults
SW1-2 ON
Module and Pin Assignments
CEM842/843 COM Express
2.5
TM
Type 6 Compact Module
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
DIMM1
Channel 1 DDR3L SO-DIMM Socket
DIMM2
Channel 0 DDR3L SO-DIMM Socket
SS1
COM ExpressTM Connector
SS2
COM ExpressTM Connector

Note
2.5.1

For single memory channel configuration, install memory module in channel 0
DDR3L SO-DIMM socket (DIMM2).
For dual memory channel configuration, install memory modules of the same
size, chip width, density and rank in channel 0 (DIMM2) and channel 1 (DIMM1)
DDR3L SO-DIMM sockets.
COM ExpressTM Connectors (SS1 and SS2)
The following table shows the pin assignments of the 220-pin COM Express
connectors.
Module and Pin Assignments
TM
11
CEM842/843 COM Express
TM
Type 6 Compact Module
Pin
Signal
Pin
Signal
Pin
Signal
Pin
Signal
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
A24
A25
A26
A27
A28
A29
A30
A31
A32
A33
A34
A35
A36
A37
A38
A39
A40
A41
A42
A43
A44
A45
A46
A47
A48
A49
A50
A51
A52
A53
A54
A55
GND (FIXED)
GBE0_MDI3GBE0_MDI3+
GBE0_LINK100#
GBE0_LINK1000#
GBE0_MDI2GBE0_MDI2+
GBE0_LINK#
GBE0_MDI1GBE0_MDI1+
GND (FIXED)
GBE0_MDI0GBE0_MDI0+
GBE0_CTREF
SUS_S3#
SATA0_TX+
SATA0_TXSUS_S4#
SATA0_RX+
SATA0_RXGND (FIXED)
N.C.
N.C.
SUS_S5#
N.C.
N.C.
BATLOW#
(S)ATA_ACT#
AC/HDA_SYNC
AC/HDA_RST#
GND (FIXED)
AC/HDA_BITCLK
AC/HDA_SDOUT
BIOS_DISABLE#
N.C.
USB6USB6+
USB_6_7_OC#
USB4USB4+
GND (FIXED)
USB2USB2+
USB_2_3_OC#
USB0USB0+
VCC_RTC
EXCD0_PERST#
EXCD0_CPPE#
LPC_SERIRQ
GND (FIXED)
PCIE_TX5+ (optional)
PCIE_TX5- (optional)
GPI0
PCIE_TX4+
B1
B2
B3
B4
B5
B6
B7
B8
B9
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
B23
B24
B25
B26
B27
B28
B29
B30
B31
B32
B33
B34
B35
B36
B37
B38
B39
B40
B41
B42
B43
B44
B45
B46
B47
B48
B49
B50
B51
B52
B53
B54
B55
GND (FIXED)
GBE0_ACT#
LPC_FRAME#
LPC_AD0
LPC_AD1
LPC_AD2
LPC_AD3
N.C.
N.C.
LPC_CLK
GND (FIXED)
PWRBTN#
SMB_CK
SMB_DAT
SMB_ALERT#
SATA1_TX+
SATA1_TXSUS_STAT#
SATA1_RX+
SATA1_RXGND (FIXED)
N.C.
N.C.
PWR_OK
N.C.
N.C.
WDT
N.C.
AC/HDA_SDIN1
AC/HDA_SDIN0
GND (FIXED)
SPKR
N.C.
N.C.
THRM#
USB7USB7+
USB_4_5_OC#
USB5USB5+
GND (FIXED)
USB3USB3+
USB_0_1_OC#
USB1USB1+
EXCD1_PERST#
EXCD1_CPPE#
SYS_RESET#
CB_RESET#
GND (FIXED)
PCIE_RX5+ (optional)
PCIE_RX5- (optional)
GPO1
PCIE_RX4+
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
C13
C14
C15
C16
C17
C18
C19
C20
C21
C22
C23
C24
C25
C26
C27
C28
C29
C30
C31
C32
C33
C34
C35
C36
C37
C38
C39
C40
C41
C42
C43
C44
C45
C46
C47
C48
C49
C50
C51
C52
C53
C54
C55
GND (FIXED)
GND
USB_SSRX0USB_SSRX0+
GND
N.C.
N.C.
GND
N.C.
N.C.
GND (FIXED)
N.C.
N.C.
GND
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
GND (FIXED)
N.C.
N.C.
DDI1_HPD
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
GND (FIXED)
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C
N.C
N.C
GND (FIXED)
N.C
N.C
N.C
N.C.
N.C
N.C
N.C.
N.C.
N.C.
GND (FIXED)
N.C.
N.C.
TYPE0#
N.C.
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
D16
D17
D18
D19
D20
D21
D22
D23
D24
D25
D26
D27
D28
D29
D30
D31
D32
D33
D34
D35
D36
D37
D38
D39
D40
D41
D42
D43
D44
D45
D46
D47
D48
D49
D50
D51
D52
D53
D54
D55
GND (FIXED)
GND
USB_SSTX0USB_SSTX0+
GND
N.C.
N.C.
GND
N.C.
N.C.
GND (FIXED)
N.C.
N.C.
GND
DDI1_CTRLCLK_AUX+
DDI1_CTRLDATA_AUXN.C.
N.C.
N.C.
N.C.
GND (FIXED)
N.C.
N.C.
N.C.
N.C.
DDI1_PAIR0+
DDI1_PAIR0N.C.
DDI1_PAIR1+
DDI1_PAIR1GND (FIXED)
DDI1_PAIR2+
DDI1_PAIR2DDI1_DDC_AUX_SEL
N.C.
DDI1_PAIR3+
DDI1_PAIR3N.C.
N.C.
N.C.
GND (FIXED)
N.C
N.C
N.C
N.C.
N.C
N.C
N.C.
N.C.
N.C.
GND (FIXED)
N.C.
N.C.
N.C.
N.C.
12
Module and Pin Assignments
CEM842/843 COM Express
TM
Type 6 Compact Module
Pin
Signal
Pin
Signal
Pin
Signal
Pin
Signal
A56
A57
A58
A59
A60
A61
A62
A63
A64
A65
A66
A67
A68
A69
A70
A71
A72
A73
A74
A75
A76
A77
A78
A79
A80
A81
A82
A83
A84
A85
A86
A87
A88
A89
A90
A91
A92
A93
A94
A95
A96
A97
A98
A99
A100
A101
A102
A103
A104
A105
A106
A107
A108
A109
A110
PCIE_TX4GND
PCIE_TX3+
PCIE_TX3GND (FIXED)
PCIE_TX2+
PCIE_TX2GPI1
PCIE_TX1+
PCIE_TX1GND
GPI2
PCIE_TX0+
PCIE_TX0GND(FIXED)
LVDS_A0+
LVDS_A0LVDS_A1+
LVDS_A1LVDS_A2+
LVDS_A2LVDS_VDD_EN
LVDS_A3+
LVDS_A3GND(FIXED)
LVDS_A_CK+
LVDS_A_CKLVDS_I2C_CK
LVDS_I2C_DAT
GPI3
N.C.
N.C.
PCIE0_CK_REF+
PCIE0_CK_REFGND (FIXED)
SPI_POWER
SPI_MISO
GPO0
SPI_CLK
SPI_MOSI
TPM_PP
TYPE10#
N.C.
N.C.
GND (FIXED)
N.C.
N.C.
LID#
VCC_12V
VCC_12V
VCC_12V
VCC_12V
VCC_12V
VCC_12V
GND (FIXED)
B56
B57
B58
B59
B60
B61
B62
B63
B64
B65
B66
B67
B68
B69
B70
B71
B72
B73
B74
B75
B76
B77
B78
B79
B80
B81
B82
B83
B84
B85
B86
B87
B88
B89
B90
B91
B92
B93
B94
B95
B96
B97
B98
B99
B100
B101
B102
B103
B104
B105
B106
B107
B108
B109
B110
PCIE_RX4GPO2
PCIE_RX3+
PCIE_RX3GND (FIXED)
PCIE_RX2+
PCIE_RX2GPO3
PCIE_RX1+
PCIE_RX1WAKE0#
WAKE1#
PCIE_RX0+
PCIE_RX0GND(FIXED)
LVDS_B0+
LVDS_B0LVDS_B1+
LVDS_B1LVDS_B2+
LVDS_B2LVDS_B3+
LVDS_B3LVDS_BKLT_EN
GND(FIXED)
LVDS_B_CK+
LVDS_B_CKLVDS_BKLT_CTRL
VCC_5V_SBY
VCC_5V_SBY
VCC_5V_SBY
VCC_5V_SBY
BIOS_DIS1
VGA_RED
GND (FIXED)
VGA_GRN
VGA_BLU
VGA_HSYNC
VGA_VSYNC
VGA_I2C_CK
VGA_I2C_DAT
SPI_CS#
N.C.
N.C.
GND (FIXED)
FAN_PWMOUT
FAN_TACHIN
SLEEP#
VCC_12V
VCC_12V
VCC_12V
VCC_12V
VCC_12V
VCC_12V
GND (FIXED)
C56
C57
C58
C59
C60
C61
C62
C63
C64
C65
C66
C67
C68
C69
C70
C71
C72
C73
C74
C75
C76
C77
C78
C79
C80
C81
C82
C83
C84
C85
C86
C87
C88
C89
C90
C91
C92
C93
C94
C95
C96
C97
C98
C99
C100
C101
C102
C103
C104
C105
C106
C107
C108
C109
C110
N.C.
TYPE1#
N.C.
N.C.
GND (FIXED)
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
GND(FIXED)
N.C.
N.C.
N.C.
N.C.
N.C.
GND
N.C.
N.C.
N.C.
GND(FIXED)
N.C.
N.C.
N.C.
GND
N.C.
N.C.
GND
N.C.
N.C.
GND (FIXED)
N.C.
N.C.
GND
N.C.
N.C.
GND
N.C.
N.C.
N.C.
GND (FIXED)
N.C.
N.C.
GND
VCC_12V
VCC_12V
VCC_12V
VCC_12V
VCC_12V
VCC_12V
GND (FIXED)
D56
D57
D58
D59
D60
D61
D62
D63
D64
D65
D66
D67
D68
D69
D70
D71
D72
D73
D74
D75
D76
D77
D78
D79
D80
D81
D82
D83
D84
D85
D86
D87
D88
D89
D90
D91
D92
D93
D94
D95
D96
D97
D98
D99
D100
D101
D102
D103
D104
D105
D106
D107
D108
D109
D110
N.C.
TYPE2#
N.C.
N.C.
GND (FIXED)
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
GND
N.C.
N.C.
GND(FIXED)
N.C.
N.C.
N.C.
N.C.
N.C.
GND
N.C.
N.C.
N.C.
GND(FIXED)
N.C.
N.C.
N.C.
GND
N.C.
N.C.
GND
N.C.
N.C.
GND (FIXED)
N.C.
N.C.
GND
N.C.
N.C.
GND
N.C.
N.C.
N.C.
GND (FIXED)
N.C.
N.C.
GND
VCC_12V
VCC_12V
VCC_12V
VCC_12V
VCC_12V
VCC_12V
GND (FIXED)
Module and Pin Assignments
13
CEM842/843 COM Express
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Type 6 Compact Module
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14
Module and Pin Assignments
CEM842/843 COM Express
TM
Type 6 Compact Module
Chapter 3
Hardware Description
3.1
Microprocessor
®
®
TM
The CEM842/843 supports Intel Celeron J1900/N2807 and Atom E3845 processors which
®
®
enable your system to operate under Windows 7, Windows 8 and Linux environments. The
system performance depends on the microprocessor. You must install the heatsink or cooler
carefully and properly to prevent damage.
3.2
BIOS
The CEM842/843 uses AMI Plug and Play BIOS with a single 64Mbit SPI Flash.
3.3
System Memory
The CEM842/843 supports two 204-pin DDR3L SO-DIMM sockets for maximum memory
capacity up to 8GB DDR3L SDRAMs. The memory module comes in sizes of 1GB, 2GB, 4GB
or 8GB.
Hardware Description
15
CEM842/843 COM Express
3.4
TM
Type 6 Compact Module
I/O Port Address Map
®
®
TM
The Intel Celeron J1900/N2807 and Atom E3845 processors communicate via I/O ports.
The I/O port addresses are available for assigning to other devices via I/O expansion cards.
®
The I/O port addresses (with CEB94006 baseboard under Windows 7) are as follows:
16
Hardware Description
CEM842/843 COM Express
3.5
TM
Type 6 Compact Module
Interrupt Controller (IRQ) Map
®
The interrupt controller (IRQ) mapping list (with CEB94006 baseboard under Windows 7) is
shown as follows:
Hardware Description
17
CEM842/843 COM Express
18
TM
Type 6 Compact Module
Hardware Description
CEM842/843 COM Express
Hardware Description
TM
Type 6 Compact Module
19
CEM842/843 COM Express
3.6
TM
Type 6 Compact Module
Memory Map
®
The memory (with CEB94006 baseboard under Windows 7) mapping list is shown as follows:
20
Hardware Description
CEM842/843 COM Express
TM
Type 6 Compact Module
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.
2.
Turn on the computer and press the <Del> key immediately.
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.
If your computer cannot boot after making and saving system changes with BIOS
setup, you can restore BIOS optimal defaults by setting SW1-2 (see section 2.4.1).
Note
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.
Some of the navigation keys differ from one screen to another.
Note
AMI BIOS Setup Utility
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CEM842/843 COM Express
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Type 6 Compact Module
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.
22
AMI BIOS Setup Utility
CEM842/843 COM Express
4.3
TM
Type 6 Compact Module
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 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.
Access Level
Display the access level of current user.
AMI BIOS Setup Utility
23
CEM842/843 COM Express
4.4
TM
Type 6 Compact Module
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
W83627DHG Super IO Configuration
Hardware Monitor
CPU Configuration
IDE Configuration
CSM Configuration
Trusted Configuration
Utility Configuration
For items marked with “”, please press <Enter> for more options.
W83627DHG Super IO configuration is applied on CEB94006.
Note
24
AMI BIOS Setup Utility
CEM842/843 COM Express
TM
Type 6 Compact Module
Launch PXE OpROM
Control the execution of legacy Preboot eXecution Environment (PXE) boot ROM function of
the onboard LAN chip during system boots up.
AMI BIOS Setup Utility
25
CEM842/843 COM Express

TM
Type 6 Compact Module
ACPI Settings
You can use this screen to select options for the ACPI configuration, and change the value
of the selected option. A description of the selected item appears on the right side of the
screen.
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.
26
AMI BIOS Setup Utility
CEM842/843 COM Express

TM
Type 6 Compact Module
W83627DHG 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
Set parameters of serial port 1~2 .
Parallel Port Configuration
Set parameters of parallel port.
AMI BIOS Setup Utility
27
CEM842/843 COM Express

TM
Type 6 Compact Module
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.

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 line is IRQ3.
28
AMI BIOS Setup Utility
CEM842/843 COM Express

TM
Type 6 Compact Module
Parallel Port Configuration
Parallel Port
Enable or disable parallel port (LPT). The optimal setting for base I/O address is 378h and
for interrupt request line is IRQ5.

Hardware Monitor
This screen is for hardware health status monitoring.
This screen displays the temperature of system and CPU, fan speed in RPM and system
voltages (VCORE, +12V and VGFX).
AMI BIOS Setup Utility
29
CEM842/843 COM Express
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Type 6 Compact Module
NCT7802Y Smart Fan1 Config
Smart Fan configuration provides two modes: FAN SMART IV MODE and FAN MANUAL
CONTROL to control fan speed. In FAN SMART IV MODE, the fan speed is controlled by
T1(temperature level1)/F1(fan duty 1), T2(temperature level2)/F2(fan duty 2) and
T3(temperature level3)/F3(fan duty 3). Please base on the specification of the fan to set
these parameters. We suggest that the range of fan duty is from 111 to 255. Setting the
value of these parameters must follow T3>T2>T1 and F3>F2>F1. The default is FAN
SMART IV MODE, and each default setting of temperature/fan duty is T1:20 F1:111, T2:70
F2:192, T3:80 F3:255.
In FAN MANUAL CONTROL mode, the fan speed is controlled by fan PWM duty and the
range is from 111 to 255.
30
AMI BIOS Setup Utility
CEM842/843 COM Express

TM
Type 6 Compact Module
CPU Configuration
This screen shows the CPU Configuration, and you can change the value of the selected
option.
Socket 0 CPU Information
Show CPU information.
Intel Virtualization Technology
Enable or disable Intel Virtualization Technology. When enabled, a VMM 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.
AMI BIOS Setup Utility
31
CEM842/843 COM Express

TM
Type 6 Compact Module
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 SATA controller.
SATA Mode
Select what mode is operated on SATA controller. Operation modes are IDE Mode and
AHCI Mode. Default is AHCI Mode.
32
AMI BIOS Setup Utility
CEM842/843 COM Express

TM
Type 6 Compact Module
CSM Configuration
In the CSM (Compatibility Support Module) Configuration menu, you can enable or disable
option ROM execution settings.
CSM support
Enable or disable CSM support.
Boot option filter
Select UEFI or Legacy ROM priority. Default is UEFI and Legacy mode.
AMI BIOS Setup Utility
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CEM842/843 COM Express
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Type 6 Compact Module
Storage
Select the execution of UEFI or Legacy storage option ROM. Default is Legacy mode.
Video
Select the execution of UEFI or Legacy video option ROM. Default is Legacy mode.
34
AMI BIOS Setup Utility
CEM842/843 COM Express
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Type 6 Compact Module
Other PCI devices
Select the execution of UEFI or Legacy option ROM of other PCIe network, storage or
video devices. Default is Legacy mode.

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. The default is Disabled.
AMI BIOS Setup Utility
35
CEM842/843 COM Express

TM
Type 6 Compact Module
Utility Configuration
BIOS Flash Utility
BIOS flash utility configuration. For more detailed information, please refer to Appendix A.
36
AMI BIOS Setup Utility
CEM842/843 COM Express
4.5
TM
Type 6 Compact Module
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.
AMI BIOS Setup Utility
37
CEM842/843 COM Express
TM
Type 6 Compact Module
North Bridge
This screen shows system memory information and allows users to configure parameters
of North Bridge chipset.
38
AMI BIOS Setup Utility
CEM842/843 COM Express
TM
Type 6 Compact Module
LVDS Panel Type
Select LVDS panel resolution; see the selection options in image above.

South Bridge
This screen allows users to configure parameters of South Bridge chipset. For items
marked with “”, please press <Enter> for more options.
AMI BIOS Setup Utility
39
CEM842/843 COM Express

TM
Type 6 Compact Module
South Bridge - Audio Controller
Audio Controller
Control detection of the HD Audio device.
- Disabled: Audio device will be unconditionally disabled.
- Enabled: Audio device will be unconditionally enabled.
40
AMI BIOS Setup Utility
CEM842/843 COM Express

TM
Type 6 Compact Module
South Bridge – USB Configuration
OS Selection
®
®
Use this item to select Windows 8.x or Windows 7 operating system to control XHCI
Mode default operating mode.
Please use USB 2.0 port 0~3 of COM Express
®
Window 7.
TM
connector raw A_B to install
Note
AMI BIOS Setup Utility
41
CEM842/843 COM Express
TM
Type 6 Compact Module
XHCI Mode
Select operation mode of XHCI controller.
USB 2.0(EHCI) Support
Control the USB 2.0(EHCI) functions. One EHCI controller must always be enabled. This
item is selectable if XHCI Mode is Disabled.
TM
In order for the USB 2.0 port 4~7 of COM Express connector raw A_B to
®
function properly in Windows 7, please install USB 3.0 driver in advance.
Note
4.6
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.
42
AMI BIOS Setup Utility
CEM842/843 COM Express
4.7
TM
Type 6 Compact Module
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.
AMI BIOS Setup Utility
43
CEM842/843 COM Express
4.8
TM
Type 6 Compact Module
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.
44
AMI BIOS Setup Utility
CEM842/843 COM Express
TM
Type 6 Compact Module

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.
AMI BIOS Setup Utility
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Type 6 Compact Module
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AMI BIOS Setup Utility
CEM842/843 COM Express
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Type 6 Compact Module
Appendix A
BIOS Flash Utility
The BIOS Flash utility is a new function in BIOS setup program. In this appendix you may learn
how to configure it. Please follow instructions below to update system BIOS from BIOS setup
menu.
1.
In your USB thumb drive, create a new folder and name it “Axiomtek”, see figure below.
2.
Copy BIOS ROM file (e.g. CEM842X.005) to “Axiomtek” folder.
CEM842X.005
3.
Insert the USB thumb drive to your system.
4.
Enter BIOS setup menu and go to Advanced\Utility Configuration. Select BIOS Flash
Utility and press <Enter>.
BIOS Flash Utility
47
CEM842/843 COM Express
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Type 6 Compact Module
5.
BIOS automatically detect all USB drive(s) attached to the system. In this example only
one USB drive is attached to the system. That’s why, you can see only one device is
displayed in figure below.
6.
Select the USB drive containing BIOS ROM file you want to update using the <> or
<> key. Then press <Enter> to get into “Axiomtek” folder.
7.
Now you can see the BIOS ROM file on the screen, press <Enter> to select.
8.
Select Start to flash system BIOS option to begin updating procedure.
48
BIOS Flash Utility
CEM842/843 COM Express
TM
Type 6 Compact Module
9.
Please wait while BIOS completes the entire flash update process: erase data, write new
data and verify data.
10.
When you see the following figure, press <Enter> to finish the update process. After that
the system will shut down and restart immediately.
BIOS Flash Utility
49
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Type 6 Compact Module
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BIOS Flash Utility
CEM842/843 COM Express
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Type 6 Compact Module
Appendix B
Watchdog Timer and GPIO
B.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.
B.2
About GPIO
The onboard GPIO (general input and output) has 8 bits (GPI0~3 and GPO0~3). In default, all
pins are pulled high with +3.3V level (according to main power). The BIOS default settings are
4 inputs and 4 outputs where all of these pins are set to 1. Use these GPIO signals to control
cash drawers and sense warning signals from an Uninterrupted Power System (UPS), or
perform store security control.
B.2
Sample Program
Programming sample code (from CEM842/843 FINTEK F75111R):
/*---------------- INCLUDE FILE ---------------------*/
#include <stdio.h>
#include <conio.h>
#include <bios.h>
#define UCHAR unsigned char
#define UINT
unsigned int
#define SMIOBASE
0xF040
/*****************
SMIOBASE can get from PCI device Bus-0,Device-31, Function-3
Register 20h~23h, the value is the IO base address.
******************/
#define SM_REG
(SMIOBASE+3)
#define SM_ADDR
(SMIOBASE+4)
#define SM_DATA
(SMIOBASE+5)
#define SM_CMD
(SMIOBASE+2)
#define SM_STATUS
(SMIOBASE+0)
#define SM_byteAccess 0x48
#define Device_Addr
0x6E // depend on hardware designed Low:0x9C, High:0x6E
UCHAR _read_smbus(UCHAR ,UCHAR);
void _write_smbus(UCHAR,UCHAR, UCHAR);
#define F75111_CHIPID
0x0003
#define F75111_VENDORID
0x3419
#define WDTOUT10_CntlReg1
0x34
#define WDTOUT10_2S_bit
0x04
//bit 2
#define WDTOUT10_OINV_bit
0x02
//bit 1
#define WDTOUT10_Status_bit
0x01
//bit 0 , write 1 for clear status
#define WDTOUT10_CntlReg2
0x35
#define WDTOUT10_Enable_bit
0x80
//bit 7
#define WDTOUT10_PTIME
0x7f
//bit 0~6
Watchdog Timer and GPIO
51
CEM842/843 COM Express
TM
Type 6 Compact Module
/* ------------------ MAIN PROGRAM ------------------*/
main()
{
UCHAR
xch,xch2;
UINT
chipid=0, vendorid=0;
//Check the Chip ID information
xch=_read_smbus(Device_Addr,0x5a);
//Chip ID 1
xch2=_read_smbus(Device_Addr,0x5b);
//Chip ID 2
chipid=((UINT)xch2 << 8) + (UINT)xch;
xch=_read_smbus(Device_Addr,0x5d);
//Vendor ID 1
xch2=_read_smbus(Device_Addr,0x5E);
//Vendor ID 2
vendorid=((UINT)xch2 << 8) + (UINT)xch;
if (F75111_CHIPID != chipid || F75111_VENDORID != vendorid )
{ printf("!!! Not found F75111 chip !!!\n");
exit(-1);
}
printf("=== Found F75111 chip ===\n");
printf("=== GPIO Output Test ===\n");
//set GPIO3x direction
printf("Set F75111 GPIO3x pin is output direction\n");
_write_smbus(Device_Addr,0x40,0x0f);
//GPIO3x Output direction
//set GPIO3x output level or plus
printf("Set F75111 GPIO3x pin is output Level\n");
_write_smbus(Device_Addr,0x43,0);
//GPIO3x Level control
//write GPIO3x data
printf("Write GPIO3x data is 0x0A\n");
printf("GPO0=0, GPO1=1, GPO2=0, GPO3=1\n");
_write_smbus(Device_Addr,0x41,0x0a);
printf("Please check the GPO level and hit any key to continue\n");
getch();
//write GPIO3x data
printf("Write GPIO3x data is 0x05\n");
printf("GPO0=1, GPO1=0, GPO2=1, GPO3=0\n");
_write_smbus(Device_Addr,0x41,0x05);
printf("Please check the GPO level and hit any key to continue\n");
getch();
//set GPIO10,11,12 used
printf("=== GPIO Input Test ===\n");
printf("Set F75111 GPIO1x is used GPIO function\n");
xch=_read_smbus(Device_Addr,0x03);
xch &= 0xE0 ;
_write_smbus(Device_Addr,0x03,xch);
//set Pin GPIO10/11/12 used
_write_smbus(Device_Addr,0x04,0);
//set Pin GPIO1x used
printf("Set F75111 GPIO10,11,12,13 is input function\n");
_write_smbus(Device_Addr,0x10,0x00);
//set GPIO1x input direction
printf("Set F75111 GPIO10,11,12,13 is Level mode\n");
_write_smbus(Device_Addr,0x13,0x00);
//set GPIO1x Level Control
xch=_read_smbus(Device_Addr,0x12);
//read GPIO1x Status
printf("Read the GPI0,1,2,3 input data is %02X\n",xch);
printf("Please Change the GPIx input and hit any key to continue\n");
getch();
xch=_read_smbus(Device_Addr,0x12);
//read GPIO1x Status
printf("Read the GPI0,1,2,3 input data is %02X\n",xch);
printf("Please Change the GPIx input and hit any key to continue\n");
getch();
xch=_read_smbus(Device_Addr,0x12);
//read GPIO1x Status
printf("Read the GPI0,1,2,3 input data is %02X\n",xch);
/*********************************************/
printf("===== WatchDogTimer Test =====\n");
printf("Set WDTOUT10 pin used\n");
_write_smbus(Device_Addr,0x01,0x20);
//Pin1 config
printf("Set WDTOUT10 output 100ms plus, normal level\n");
_write_smbus(Device_Addr,WDTOUT10_CntlReg1,0);
//WDT10 control
printf("Set WDTOUT10 Time 10 seconds and enable WDT\n");
_write_smbus(Device_Addr,WDTOUT10_CntlReg2,0x8A);
//WDT10 control
52
Watchdog Timer and GPIO
CEM842/843 COM Express
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Type 6 Compact Module
printf("Please hit any key in period of 10 seconds\n");
getch();
_write_smbus(Device_Addr,WDTOUT10_CntlReg2,0x8A);
//WDT10 control
printf("The sytsem will reset when the 10 seconds times out\n");
}
void _write_smbus(UCHAR xAddr,UCHAR xReg, UCHAR xData)
{
while (1)
{ if (_check_smbus_busy()==0) break;
}
outp(SM_REG, xReg);
xdelay();
//because the CPU too fast,delay
outp(SM_ADDR, xAddr);
xdelay();
//because the CPU too fast,delay
outp(SM_DATA, xData);
xdelay();
//because the CPU too fast,delay
outp(SM_CMD, SM_byteAccess);
xdelay();
//because the CPU too fast,delay
outp(SM_STATUS, 02); //clear interrupt status
}
UCHAR _read_smbus(UCHAR xAddr,UCHAR xReg)
{
UCHAR
xch,xch2;
while (1)
{ if (_check_smbus_busy()==0) break;
}
outp(SM_REG, xReg);
xdelay();
//because the CPU
outp(SM_ADDR, xAddr+1);
xdelay();
//because the CPU
outp(SM_CMD, SM_byteAccess);
xdelay();
//because the CPU
while (1)
{ if (_check_smbus_busy()==0) break;
}
xch=inp(SM_DATA);
xdelay();
//because the CPU
outp(SM_STATUS, 2); //clear interrupt
return xch;
}
_check_smbus_busy(void)
{
UCHAR
xch;
xch=inp(SM_STATUS);
if (xch & 0x02 ) outp(SM_STATUS, 2);
if ( xch & 0x02 ) return 1;
if ( xch & 0x01 ) return 1;
return 0;
}
for IO
for IO
for IO
for IO
too fast,delay for IO
too fast,delay for IO
too fast,delay for IO
too fast,delay for IO
status
//clear interrupt status
xdelay()
{
int
xxi,xxj,xxk=0;
for (xxi=0 ; xxi< 0x1000 ; xxi++) {
for (xxj=0 ; xxj < 0x100 ; xxj++) {
xxk++;
}
}
}
Watchdog Timer and GPIO
53
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