AXIOMTEK CEM520 User manual

CEM520
8th Generation Intel®Core i7/i5/i3
Intel®Xeon processors COM
ExpressTM Type 6 Basic Module
User’s Manual

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 2019 Axiomtek Co., Ltd.
All Rights Reserved
November 2019, Version A1
Printed in Taiwan

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.

iv
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
1.4 Block Diagram.....................................................................................4
Chapter 2 Module and Pin Assignments.................. 5
2.1 Module Dimensions and Fixing Holes...............................................5
2.2 Module Layout.....................................................................................7
2.3 Installing Thermal Solution ................................................................9
2.4 Switch Settings .................................................................................10
2.4.1 Auto Power On and Restore BIOS Optimal Defaults (SW1)..................... 10
2.4.2 PCI-Express Bifurcation Setting (SW2) .................................................... 10
2.5 Connectors........................................................................................11
2.5.1 Fan Connector (CN1).................................................................................11
2.5.2 COM ExpressTM Connectors (SS1 and SS2).............................................11
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 .........................................................18
3.6 Memory Map ......................................................................................23
Chapter 4 AMI BIOS Setup Utility .......................... 25
4.1 Starting...............................................................................................25
4.2 Navigation Keys ................................................................................25
4.3 Main Menu..........................................................................................27
4.4 Advanced Menu.................................................................................28
4.5 Chipset Menu.....................................................................................43

v
4.6 Security Menu....................................................................................48
4.7 Boot Menu..........................................................................................49
4.8 Save & Exit Menu ..............................................................................51
Appendix A Watchdog Timer and GPIO .................. 53
A.1 About Watchdog Timer.....................................................................53
A.2 How to Use Watchdog Timer............................................................53
A.3 About GPIO........................................................................................53
A.4 Sample Program................................................................................54
Appendix B iAMT Settings ...................................... 55
B.1 Entering MEBx...................................................................................55
B.2 Set and Change Password...............................................................55
B.3 iAMT Settings ....................................................................................58
B.4 iAMT Web Console............................................................................63

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CEM520 COM ExpressTM Type 6 Basic Module
Introduction 1
Chapter 1
Introduction
The CEM520 is a new COM ExpressTM Type 6 Basic Module supporting Intel®Xeon 8th Gen /
Intel®Core™ i7/i5/i3 processors and Intel®CM246/QM370/HM370. It delivers outstanding
system performance and supports excellent multiple I/Os like LVDS, one Gigabit Ethernet, HD
Audio interface, four SATA-600, four USB 3.0 and eight USB 2.0 ports. For extension purpose,
it provides maximum up to 24 lanes of PCI-Express Gen 3 which could fulfill various
applications with high computing requirement.
1.1 Features
Intel®Core i7/i5/i3 and Xeon processors
Two SO-DIMMs supporting up to 32GB memory capacity
Support max. up to 24 lanes of PCI-Express
4 SATA-600 with RAID 0/1/5/10
4 USB 3.0 and 8 USB 2.0 ports

CEM520 COM ExpressTM Type 6 Basic Module
2 Introduction
1.2 Specifications
CPU
Intel®Core i7-8850H.
Intel®Core i5-8400H.
Intel®Core i3-8100H.
Intel®E-2176M.
BIOS
American Megatrends Inc. BIOS.
UEFI Legacy Free.
System Memory
Two 260-pin DDR4 2666MHz SO-DIMM sockets support maximum memory capacity
up to 32GB.
Expansion Interface
1 x PCIe x16 v3.0 (8GT/s) configurable (1 x16, 2 x8, 1 x8+2 x4).
8 x PCIe 3.0.
USB Interface
Four USB ports comply with USB Spec. Rev. 3.0.
Eight USB ports comply with USB Spec. Rev. 2.0.
SATA Interface
Four SATA 6Gb/s ports supported through COM ExpressTM connector.
TPM
Trusted Platform Module compatible with TPM2.0 Main and PC Client specification
based on Intel LPC Bus Interface.
Graphics & Display
Intel®Gen 9 HD Graphic.
Gfx APIs - DX11/12, OCL2.x, OGL 4.3/4.4.
1 x LVDS; 18/24-bit single/dual channel (default), optional with eDP 1.4: 4096 x 2304
@60Hz.
1 x VGA up to 1920 x 1200 @60Hz (default).
2 x DDI (DisplayPort 1.2: 4096 x 2304 @60Hz/HDMI 1.4: 4096 x 2160 @30/24Hz).
Ethernet
One 1000/100/10 Base-T provided by Intel®I219LM; supports Wake-on-LAN, PXE
Boot ROM, iAMT.
Audio
Intel®High Definition audio interface.
Operating Temperature
-20ºC to 70ºC (With fan).
-40ºC to 85ºC (System).
Power Input
ATX: +12V and +5VSB.
AT: +12V.

CEM520 COM ExpressTM Type 6 Basic Module
Introduction 3
Power Management
ACPI (Advanced Configuration and Power Interface).
Form Factor
Basic module 125mm x 95mm.
1.3 Utilities Supported
Chipset driver
Graphics driver
ME driver
Ethernet utility and driver
Note
All specifications and images are subject to change without notice.

CEM520 COM ExpressTM Type 6 Basic Module
4 Introduction
1.4 Block Diagram

CEM520 COM ExpressTM Type 6 Basic Module
Module and Pin Assignments 5
Chapter 2
Module and Pin Assignments
2.1 Module Dimensions and Fixing Holes
Top View

CEM520 COM ExpressTM Type 6 Basic Module
6 Module and Pin Assignments
Bottom View

CEM520 COM ExpressTM Type 6 Basic Module
Module and Pin Assignments 7
2.2 Module Layout
Top View

CEM520 COM ExpressTM Type 6 Basic Module
8 Module and Pin Assignments
Bottom View

CEM520 COM ExpressTM Type 6 Basic Module
Module and Pin Assignments 9
2.3 Installing Thermal Solution
For thermal dissipation, a thermal solution enables the CEM520’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
CEM520.
1. There is a protective plastic covering on the thermal pads. This must be removed before
the heatsink can be mounted.
2. Each heatsink is designed for a specific CEM module. The thermal pads on the heatsink
are designed to make contact with the necessary components on the CEM module.
When mounting the heatsink you must make sure that the thermal pads on the heatsink
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
heatsink acts as a proper thermal interface for cooling solutions.
3. Before installing the heatsink to the CPU module, please apply thermal grease on the
CPU die. This CPU module has assembly holes for installing heatsink plate. Use the
appropriate screws to secure the heatsink plate to the CEM520. Be careful not to
over-tighten the screws.

CEM520 COM ExpressTM Type 6 Basic Module
10 Module and Pin Assignments
2.4 Switch Settings
Properly configure switch settings on the CEM520 to meet your application purpose. Below
you can find a summary table of all switches and onboard default settings.
Note
Once the default switch setting needs to be changed, please do it under power-off
condition.
Switch
Description
Setting
SW1
Auto Power On
Default: Disable
SW1-1 OFF
Restore BIOS Optimal Defaults
Default: Normal Operation
SW1-2 OFF
SW2
PCI-Express Bifurcation Setting
Default: One x16 PCI-Express
SW1-1 OFF, SW1-2 OFF
2.4.1 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 switch 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.
2.4.2 PCI-Express Bifurcation Setting (SW2)
The SW2 is for PCI-Express bifurcation setting. See table below for detailed information.
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
Function
Setting
Select one x8 and two x4 PCI-Express
SW2-1 ON, SW2-2 ON
Select two x8 PCI-Express
SW2-1 ON, SW2-2 OFF
Reserved
SW2-1 OFF, SW2-2 ON
Select one x16 PCI-Express (Default)
SW2-1 OFF, SW2-2 OFF

CEM520 COM ExpressTM Type 6 Basic Module
Module and Pin Assignments 11
2.5 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
CN1
Fan Connector
SS1
COM ExpressTM Connector
SS2
COM ExpressTM Connector
DIMM1
Channel 0 DDR4 SO-DIMM Socket
DIMM2
Channel 1 DDR4 SO-DIMM Socket
Note
For single memory channel configuration, install memory module in channel 0
(DIMM1) DDR4 SO-DIMM socket.
For dual memory channel configuration, install memory modules of the same
size, chip width, density and rank in channel 0 (DIMM1) and channel 1 (DIMM2)
DDR4 SO-DIMM sockets.
2.5.1 Fan Connector (CN1)
The CN1 is a 3-pin connector for fan interface.
3 1
2.5.2 COM ExpressTM Connectors (SS1 and SS2)
The following table shows pin assignments of the 220-pin COM ExpressTM connectors.
Pin
Signal
1
GND
2
+12V fan speed control
3
Fan speed feedback
1 3

CEM520 COM ExpressTM Type 6 Basic Module
12 Module and Pin Assignments
Pin
Signal
Pin
Signal
Pin
Signal
Pin
Signal
A1
GND (FIXED)
B1
GND (FIXED)
C1
GND (FIXED)
D1
GND (FIXED)
A2
GBE0_MDI3-
B2
GBE0_ACT#
C2
GND (FIXED)
D2
GND (FIXED)
A3
GBE0_MDI3+
B3
LPC_FRAME#
C3
USB_SSRX0-
D3
USB_SSTX0-
A4
GBE0_LINK100#
B4
LPC_AD0
C4
USB_SSRX0+
D4
USB_SSTX0+
A5
GBE0_LINK1000#
B5
LPC_AD1
C5
GND (FIXED)
D5
GND (FIXED)
A6
GBE0_MDI2-
B6
LPC_AD2
C6
USB_SSRX1-
D6
USB_SSTX1-
A7
GBE0_MDI2+
B7
LPC_AD3
C7
USB_SSRX1+
D7
USB_SSTX1+
A8
GBE0_LINK#
B8
RSVD
C8
GND (FIXED)
D8
GND (FIXED)
A9
GBE0_MDI1-
B9
RSVD
C9
USB_SSRX2-
D9
USB_SSTX2-
A10
GBE0_MDI1+
B10
LPC_CLK
C10
USB_SSRX2+
D10
USB_SSTX2+
A11
GND (FIXED)
B11
GND (FIXED)
C11
GND (FIXED)
D11
GND (FIXED)
A12
GBE0_MDI0-
B12
PWRBTN#
C12
USB_SSRX3-
D12
USB_SSTX3-
A13
GBE0_MDI0+
B13
SMB_CK
C13
USB_SSRX3+
D13
USB_SSTX3+
A14
GBE0_CTREF
B14
SMB_DAT
C14
GND (FIXED)
D14
GND (FIXED)
A15
SUS_S3#
B15
SMB_ALERT#
C15
RSVD
D15
DDI1_CTRLCLK_AUX+
A16
SATA0_TX+
B16
SATA1_TX+
C16
RSVD
D16
DDI1_CTRLDATA_AUX-
A17
SATA0_TX-
B17
SATA1_TX-
C17
RSVD
D17
RSVD
A18
SUS_S4#
B18
SUS_STAT#
C18
RSVD
D18
RSVD
A19
SATA0_RX+
B19
SATA1_RX+
C19
PCIE_RX6+
D19
PCIE_TX6+
A20
SATA0_RX-
B20
SATA1_RX-
C20
PCIE_RX6-
D20
PCIE_TX6-
A21
GND (FIXED)
B21
GND (FIXED)
C21
GND (FIXED)
D21
GND (FIXED)
A22
SATA2_TX+
B22
SATA3_TX+
C22
PCIE_RX7+
D22
PCIE_TX7+
A23
SATA2_TX-
B23
SATA3_TX-
C23
PCIE_RX7-
D23
PCIE_TX7-
A24
SUS_S5#
B24
PWR_OK
C24
DDI1_HPD
D24
RSVD
A25
SATA2_RX+
B25
SATA3_RX+
C25
RSVD
D25
RSVD
A26
SATA2_RX-
B26
SATA3_RX-
C26
RSVD
D26
DDI1_PAIR0+
A27
BATLOW#
B27
WDT
C27
RSVD
D27
DDI1_PAIR0-
A28
(S)ATA_ACT#
B28
RSVD
C28
RSVD
D28
RSVD
A29
HDA_SYNC
B29
HDA_SDIN1
C29
RSVD
D29
DDI1_PAIR1+
A30
HDA_RST#
B30
HDA_SDIN0
C30
RSVD
D30
DDI1_PAIR1-
A31
GND (FIXED)
B31
GND (FIXED)
C31
GND (FIXED)
D31
GND (FIXED)
A32
AC/HDA_BITCLK
B32
SPKR
C32
DDI2_CTRLCLK_AUX+
D32
DDI1_PAIR2+
A33
AC/HDA_SDOUT
B33
I2C_CK
C33
DDI2_CTRLDATA_AUX-
D33
DDI1_PAIR2-
A34
BIOS_DISABLE#
B34
I2C_DAT
C34
DDI2_DDC_AUX_SEL
D34
DDI1_DDC_AUX_SEL
A35
THRMTRIP#
B35
THRM#
C35
RSVD
D35
RSVD
A36
USB6-
B36
USB7-
C36
DDI3_CTRLCLK_AUX+
D36
DDI1_PAIR3+
A37
USB6+
B37
USB7+
C37
DDI3_CTRLDATA_AUX-
D37
DDI1_PAIR3-
A38
USB_6_7_OC#
B38
USB_4_5_OC#
C38
DDI3_DDC_AUX_SEL
D38
RSVD
A39
USB4-
B39
USB5-
C39
DDI3_PAIR0+
D39
DDI2_PAIR0+
A40
USB4+
B40
USB5+
C40
DDI3_PAIR0-
D40
DDI2_PAIR0-
A41
GND (FIXED)
B41
GND (FIXED)
C41
GND (FIXED)
D41
GND (FIXED)
A42
USB2-
B42
USB3-
C42
DDI3_PAIR1+
D42
DDI2_PAIR1+
A43
USB2+
B43
USB3+
C43
DDI3_PAIR1-
D43
DDI2_PAIR1-
A44
USB_2_3_OC#
B44
USB_0_1_OC#
C44
DDI3_HPD
D44
DDI2_HPD
A45
USB0-
B45
USB1-
C45
RSVD
D45
RSVD
A46
USB0+
B46
USB1+
C46
DDI3_PAIR2+
D46
DDI2_PAIR2+
A47
VCC_RTC
B47
RSVD
C47
DDI3_PAIR2-
D47
DDI2_PAIR2-
A48
RSVD
B48
RSVD
C48
RSVD
D48
RSVD
A49
RSVD
B49
SYS_RESET#
C49
DDI3_PAIR3+
D49
DDI2_PAIR3+
A50
LPC_SERIRQ
B50
CB_RESET#
C50
DDI3_PAIR3-
D50
DDI2_PAIR3-
A51
GND (FIXED)
B51
GND (FIXED)
C51
GND (FIXED)
D51
GND (FIXED)
A52
PCIE_TX5+
B52
PCIE_RX5+
C52
PEG_RX0+
D52
PEG_TX0+
A53
PCIE_TX5-
B53
PCIE_RX5-
C53
PEG_RX0-
D53
PEG_TX0-
A54
GPI0
B54
GPO1
C54
TYPE0#
D54
PEG_LANE_RV#
A55
PCIE_TX4+
B55
PCIE_RX4+
C55
PEG_RX1+
D55
PEG_TX1+

CEM520 COM ExpressTM Type 6 Basic Module
Module and Pin Assignments 13
Pin
Signal
Pin
Signal
Pin
Signal
Pin
Signal
A56
PCIE_TX4-
B56
PCIE_RX4-
C56
PEG_RX1-
D56
PEG_TX1-
A57
GND
B57
GPO2
C57
TYPE1#
D57
TYPE2#
A58
PCIE_TX3+
B58
PCIE_RX3+
C58
PEG_RX2+
D58
PEG_TX2+
A59
PCIE_TX3-
B59
PCIE_RX3-
C59
PEG_RX2-
D59
PEG_TX2-
A60
GND (FIXED)
B60
GND (FIXED)
C60
GND (FIXED)
D60
GND (FIXED)
A61
PCIE_TX2+
B61
PCIE_RX2+
C61
PEG_RX3+
D61
PEG_TX3+
A62
PCIE_TX2-
B62
PCIE_RX2-
C62
PEG_RX3-
D62
PEG_TX3-
A63
GPI1
B63
GPO3
C63
RSVD
D63
RSVD
A64
PCIE_TX1+
B64
PCIE_RX1+
C64
RSVD
D64
RSVD
A65
PCIE_TX1-
B65
PCIE_RX1-
C65
PEG_RX4+
D65
PEG_TX4+
A66
GND
B66
WAKE0#
C66
PEG_RX4-
D66
PEG_TX4-
A67
GPI2
B67
WAKE1#
C67
RSVD
D67
GND
A68
PCIE_TX0+
B68
PCIE_RX0+
C68
PEG_RX5+
D68
PEG_TX5+
A69
PCIE_TX0-
B69
PCIE_RX0-
C69
PEG_RX5-
D69
PEG_TX5-
A70
GND(FIXED)
B70
GND(FIXED)
C70
GND(FIXED)
D70
GND(FIXED)
A71
LVDS_A0+
B71
LVDS_B0+
C71
PEG_RX6+
D71
PEG_TX6+
A72
LVDS_A0-
B72
LVDS_B0-
C72
PEG_RX6-
D72
PEG_TX6-
A73
LVDS_A1+
B73
LVDS_B1+
C73
GND(FIXED)
D73
GND
A74
LVDS_A1-
B74
LVDS_B1-
C74
PEG_RX7+
D74
PEG_TX7+
A75
LVDS_A2+
B75
LVDS_B2+
C75
PEG_RX7-
D75
PEG_TX7-
A76
LVDS_A2-
B76
LVDS_B2-
C76
GND
D76
GND
A77
LVDS_VDD_EN
B77
LVDS_B3+
C77
RSVD
D77
RSVD
A78
LVDS_A3+
B78
LVDS_B3-
C78
PEG_RX8+
D78
PEG_TX8+
A79
LVDS_A3-
B79
LVDS_BKLT_EN
C79
PEG_RX8-
D79
PEG_TX8-
A80
GND(FIXED)
B80
GND(FIXED)
C80
GND(FIXED)
D80
GND(FIXED)
A81
LVDS_A_CK+
B81
LVDS_B_CK+
C81
PEG_RX9+
D81
PEG_TX9+
A82
LVDS_A_CK-
B82
LVDS_B_CK-
C82
PEG_RX9-
D82
PEG_TX9-
A83
LVDS_I2C_CK
B83
LVDS_BKLT_CTRL
C83
RSVD
D83
RSVD
A84
LVDS_I2C_DAT
B84
VCC_5V_SBY
C84
GND
D84
GND
A85
GPI3
B85
VCC_5V_SBY
C85
PEG_RX10+
D85
PEG_TX10+
A86
SD_VDD_PWR_EN
B86
VCC_5V_SBY
C86
PEG_RX10-
D86
PEG_TX10-
A87
eDP_HPD
B87
VCC_5V_SBY
C87
GND
D87
GND
A88
PCIE0_CK_REF+
B88
BIOS_DIS1
C88
PEG_RX11+
D88
PEG_TX11+
A89
PCIE0_CK_REF-
B89
VGA_RED
C89
PEG_RX11-
D89
PEG_TX11-
A90
GND (FIXED)
B90
GND (FIXED)
C90
GND (FIXED)
D90
GND (FIXED)
A91
SPI_POWER
B91
VGA_GRN
C91
PEG_RX12+
D91
PEG_TX12+
A92
SPI_MISO
B92
VGA_BLU
C92
PEG_RX12-
D92
PEG_TX12-
A93
GPO0
B93
VGA_HSYNC
C93
GND
D93
GND
A94
SPI_CLK
B94
VGA_VSYNC
C94
PEG_RX13+
D94
PEG_TX13+
A95
SPI_MOSI
B95
VGA_I2C_CK
C95
PEG_RX13-
D95
PEG_TX13-
A96
TPM_PP
B96
VGA_I2C_DAT
C96
GND
D96
GND
A97
TYPE10#
B97
SPI_CS#
C97
RSVD
D97
RSVD
A98
SER0_TX
B98
RSVD
C98
PEG_RX14+
D98
PEG_TX14+
A99
SER0_RX
B99
RSVD
C99
PEG_RX14-
D99
PEG_TX14-
A100
GND (FIXED)
B100
GND (FIXED)
C100
GND (FIXED)
D100
GND (FIXED)
A101
SER1_TX
B101
FAN_PWMOUT
C101
PEG_RX15+
D101
PEG_TX15+
A102
SER1_RX
B102
FAN_TACHIN
C102
PEG_RX15-
D102
PEG_TX15-
A103
LID#
B103
SLEEP#
C103
GND
D103
GND
A104
VCC_12V
B104
VCC_12V
C104
VCC_12V
D104
VCC_12V
A105
VCC_12V
B105
VCC_12V
C105
VCC_12V
D105
VCC_12V
A106
VCC_12V
B106
VCC_12V
C106
VCC_12V
D106
VCC_12V
A107
VCC_12V
B107
VCC_12V
C107
VCC_12V
D107
VCC_12V
A108
VCC_12V
B108
VCC_12V
C108
VCC_12V
D108
VCC_12V
A109
VCC_12V
B109
VCC_12V
C109
VCC_12V
D109
VCC_12V
A110
GND (FIXED)
B110
GND (FIXED)
C110
GND (FIXED)
D110
GND (FIXED)

CEM520 COM ExpressTM Type 6 Basic Module
14 Module and Pin Assignments
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