Acrosser Technology ACM-XE21B6 User manual

ACM-XE21B6
User Manual
Acrosser Technology Co., Ltd.
www.acrosser.com
ACM-XE21B6
COM Express Basic Module Type 6
with Intel®CM246

ACM-XE21B6
2Acrosser Technology Co., Ltd.
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Ver: 100
Date: Dec. 28, 2021
Disclaimer
For the purpose of improving reliability, design and function, the information in
this document is subject to change without prior notice and does not represent a
commitment on the part of Acrosser Technology Co., Ltd.
In no event will Acrosser Technology Co., Ltd. be liable for direct, indirect, special,
incidental, or consequential damages arising out of the use or inability to use the
product or documentation, even if advised of the possibility of such damages.
Copyright
This document contains proprietary information protected by copyright. All rights are
reserved. No part of this manual may be reproduced by any mechanical, electronic,
or other means in any form without prior written permission of Acrosser Technology
Co., Ltd.
Trademarks
The product names appear in this manual are for identication purpose only. The
trademarks and product names or brand names appear in this manual are the
property of their respective owners.
Purpose
This document is intended to provide the information about the features and use of
the product.
Audience
The intended audiences are technical personnel, not for general audiences.
WARNING
Danger of explosion if batteries are incorrectly replaced. Always replace the
battery with the same specications. Dispose of used batteries according to the
manufacturer's instructions.
Before running the system, make sure the power cord is rmly plugged into the
socket.
CAUTION
IEC 60417-6042 (2010-11) IEC 60417-6172 (2012-09)
All power cords must be disconnected during product repair.

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Table of Contents
1. Introduction ...................................................................5
1.1. Specications ............................................................................................................. 5
1.2. Packing List ................................................................................................................ 6
1.3. Block Diagram ............................................................................................................ 7
2. Hardware Information ...................................................8
2.1. Mainboard Layout....................................................................................................... 8
2.2. Connector Pin Denition............................................................................................. 9
2.2.1. CN1, CN2 Pin Assignments ............................................................................ 9
2.3. Board Dimension...................................................................................................... 13
2.4. Memory Module Installation...................................................................................... 15
2.5. Heat Spreader Installation........................................................................................ 16
3. BIOS Settings...............................................................18
3.1. Main Setup ............................................................................................................... 18
3.2. Advanced Setup ....................................................................................................... 19
3.2.1. W83627DHG HW Monitor............................................................................. 20
3.2.2. Serial Port Console Redirection .................................................................... 20
3.2.3. CSM Conguration........................................................................................ 21
3.2.4. NVMe Conguration...................................................................................... 22
3.2.5. USB Conguration ........................................................................................ 22
3.3. Chipset Setup........................................................................................................... 23
3.3.1. SATA and RST Conguration ........................................................................ 24
3.4. Boot Setup................................................................................................................ 25
3.5. Security Setup .......................................................................................................... 25
3.6. Save & Exit Setup..................................................................................................... 26
4. Software Installation and Programming Guide...........27
4.1. Introduction............................................................................................................... 27
4.1.1. Environment .................................................................................................. 27
4.1.2. GPIO and Watchdog ..................................................................................... 27
4.2. API List and Descriptions ......................................................................................... 27
4.2.1. GPIO ............................................................................................................. 27
4.2.2. Watchdog ...................................................................................................... 28

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4Acrosser Technology Co., Ltd.
5. FAQ ...............................................................................29
Q 1. Where can I nd the serial number of this product?................................................. 29

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1. Introduction
ACM-XE21B6 is the latest COM Express Type 6 Basic Module of Acrosser that is
equipped with the new Coffee Lake CM246 platform with both i7 9850HE & Xeon
E-2176M highest performance CPU for selecting. And also, it includes a total of 24
PCIe Lanes for expansion (1x PCIe x16 or 2x PCIe x8, selected by BIOS setting
and 8x PCIe x1), which fully complies with the PICMG.COM standard specication,
so it can offer higher CPU computing & higher data transmission speed in industrial
applications.
1.1. Specifications
CPU • ACM-XE21B6-A1: Intel®Xeon®E-2176M (6C/12T,
12M Cache, 2.7GHz/4.4GHz)
• ACM-XE21B6-A2: Intel®Core™i7 9850HE (6C/12T,
9M Cache, 2.7GHz/4.4GHz)
Chipset • Intel®CM246
BIOS • Software protection function
• BIOS setting for 1x PCI-e x16 & 2x PCI-e x8
Memory • 2x DDR4 SO-DIMM 2666MHz up to 64GB
Graphic Chipset • Intel Gen9 UHD Graphics 630 Engine
VGA • 1x VGA (Connector on the carrier board)
Digital Display
Interface
• 2 ports (Connector on the carrier board)
Ethernet Chipset • Intel I210IT chipset, support PXE Boot
Ethernet • 1x GbE, support PXE Boot function and set as 1st boot
device (Connector on the carrier board)
SATA • 4x SATA III (6.0Gb/s) (Connector on the carrier board)
RAID • Support RAID 0, 1, 5, 0+1
USB • 8x USB2.0
• 4x USB3.1
• (Connector on the carrier board)
Serial Port • 2x RS-232 (Only TX & RX)
• (Connector on the carrier board)
GPIO • 4-bit x GPI and 4-bit x GPO
• (Connector on the carrier board)
Fan Connector • 1x 2.54mm 3-pin wafer for CPU fan
Audio • Intel High Denition Audio
• (Connector on the carrier board)

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Expansion • 1x PCIe x16(PEG), 8x PCIe x1
• LPC (w/o connector), SPI, SMBus, I2C
• (Connector on the carrier board)
OS Support • Linux Kernel 4.14
Watchdog Timer • Software programmable 0~255 seconds, 0 = disable
timer.
Power Mode • AT Mode (System auto on after power in, no button
needed)
CMOS Battery • Without CMOS Battery
Operating Temperature • 0~60°C (32~104°F)
Dimension • 125 x 95mm (4.92” x 3.74”)
Safety • CE, FCC Class A
1.2. Packing List
Check if the following items are included in the package.
Item Q’ty
�ACM-XE21B6-A1 (Xeon E-2176M)
or ACM-XE21B6-A2 (Core i7 9850HE)
1
�Heat spreader + CPU FAN 1
�1g thermal grease 1

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1.3. Block Diagram
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
Intel C240 Series
Mobile Chipset (PCH)
Coffee Lake H
Mobile Processor
BGA1440
BGA874
4x SATA GEN3
DMI
X'TAL
24MHz
PCH CLOCK
BUFFER
PCH CLOCK
BUFFER
USB2.0: 480Mbps
LPC BUS
IMVP8
PWM Controller
6x PCIe PORT x1
SPI
Flash ROM
SPI
HD AUDIO LINK
8x USB2.0
LPC BUS
COM1 & COM2
GPIO
4x USB3.1
USB3.1: 5Gbps
PCI Express x16
COM Express Type6 Row C_D (220-PIN)
COM Express Type6 Row A_B (220-PIN)
2x PCIe PORT x1
DisplayPort to VGA
Converter
Analog VGA
Ethernet Controller
PCIe x1GbE MDI Bus
DDI3 Port D
DDI2 Port C
DDI1 Port B
ECC DDR4 SODIMM
ECC DDR4 SODIMM
DDR4 - 1866/2133/2400/2666 MT/s
CHANNEL A
CHANNEL B
PCIe3.0: 8Gbps
PCIe3.0: 8GbpsSATA3.0: 6Gbps
SVID
Intel Xeon E-2176M
Intel CM246
HDMI
HDMI
RTD2166
i210-IT
W83627DHG-P
SUPER I/O
DP
Title : Page :
Document Number : Rev :
Date : Size : 16.8" X 11.8"
/BLOCK DIAGRAM
021-001
Tuesday, October 29, 2019
ACM-XE21MTE (M902)
2 36Title : Page :
Document Number : Rev :
Date : Size : 16.8" X 11.8"
/BLOCK DIAGRAM
021-001
Tuesday, October 29, 2019
ACM-XE21MTE (M902)
2 36Title : Page :
Document Number : Rev :
Date : Size : 16.8" X 11.8"
/BLOCK DIAGRAM
021-001
Tuesday, October 29, 2019
ACM-XE21MTE (M902)
2 36
Intel Xeon E-2176M

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2. Hardware Information
2.1. Mainboard Layout
Top View
SO-DIMM1
SO-DIMM2
CCMOS1
CPUFAN1
Bottom View
CN1
CN2

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2.2. Connector Pin Definition
CCMOS1 CMOS Memory Clearing Pads
Short these two soldering pads and then open to reset PCH
registers in the RTC well to default value.
PADS Signal
Short Clear CMOS
Open Normal
SO-DIMM1, SO-DIMM2 ECC DDR4 SO-DIMM 260P
CPUFAN1 Fan Connector
Pin # Signal
1 GND
2 +12V
3 FAN Speed Sensor
Header: 3-pin. Pitch: 2.54mm.
CN1, CN2 CN1: COM Express Module Type 6 Connector Rows A/B
CN2: COM Express Module Type 6 Connector Rows C/D
(Refer to the following CN1, CN2 Pin Assignments)
2.2.1. CN1, CN2 Pin Assignments
Pin # CN1 – Row A CN1 – Row B CN2 – Row C CN2 – Row D
1GND(FIXED) GND(FIXED) GND(FIXED) GND(FIXED)
2GBE0_MDI3- GBE0_ACT# GND(FIXED) GND(FIXED)
3GBE0_MDI3+ LPC_FRAME# USB_SSRX0- USB_SSTX0-
4GBE0_LINK100# LPC_AD0 USB_SSRX0+ USB_SSTX0+
5GBE0_LINK1000# LPC_AD1 GND(FIXED) GND(FIXED)
6GBE0_MDI2- LPC_AD2 USB_SSRX1- USB_SSTX1-
7GBE0_MDI2+ LPC_AD3 USB_SSRX1+ USB_SSTX1+
8No Connect (Note1) LPC_DRQ0# GND(FIXED) GND(FIXED)
9GBE0_MDI1- LPC_DRQ1# USB_SSRX2- USB_SSTX2-
10 GBE0_MDI1+ LPC_CLK USB_SSRX2+ USB_SSTX2+
11 GND(FIXED) GND(FIXED) GND(FIXED) GND(FIXED)
12 GBE0_MDI0- PWRBTN# USB_SSRX3- USB_SSTX3-
13 GBE0_MDI0+ SMB_CK USB_SSRX3+ USB_SSTX3+

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Pin # CN1 – Row A CN1 – Row B CN2 – Row C CN2 – Row D
14 GBE0_CTREF SMB_DAT GND(FIXED) GND(FIXED)
15 SUS_S3# SMB_ALERT# DDI1_PAIR6+ DDI1_CTRLCLK_AUX+
16 SATA0_TX+ SATA1_TX+ DDI1_PAIR6- DDI1_CTRLDATA_AUX-
17 SATA0_TX- SATA1_TX- RSVD RSVD
18 SUS_S4# SUS_STAT# RSVD RSVD
19 SATA0_RX+ SATA1_RX+ PCIE_RX6+ PCIE_TX6+
20 SATA0_RX- SATA1_RX- PCIE_RX6- PCIE_TX6-
21 GND(FIXED) GND(FIXED) GND(FIXED) GND(FIXED)
22 SATA2_TX+ SATA3_TX+ PCIE_RX7+ PCIE_TX7+
23 SATA2_TX- SATA3_TX- PCIE_RX7- PCIE_TX7-
24 SUS_S5# PWR_OK DDI1_HPD RSVD
25 SATA2_RX+ SATA3_RX+ DDI1_PAIR4+ RSVD
26 SATA2_RX- SATA3_RX- DDI1_PAIR4- DDI1_PAIR0+
27 BATLOW# WDT RSVD DDI1_PAIR0-
28 SATA_ACT# AC/HDA_SDIN2 RSVD RSVD
29 AC/HDA_SYNC AC/HDA_SDIN1 DDI1_PAIR5+ DDI1_PAIR1+
30 AC/HDA_RST# AC/HDA_SDIN0 DDI1_PAIR5- DDI1_PAIR1-
31 GND(FIXED) GND(FIXED) GND(FIXED) GND(FIXED)
32 AC/HDA_BITCLK SPKR DDI2_CTRLCLK_AUX+ DDI1_PAIR2+
33 AC/HDA_SDOUT I2C_CK DDI2_CTRLDATA_AUX- DDI1_PAIR2-
34 BIOS_DIS0# I2C_DAT DDI2_DDC_AUX_SEL DDI1_DDC_AUX_SEL
35 THRMTRIP# THRM# RSVD RSVD
36 USB6- USB7- DDI3_CTRLCLK_AUX+ DDI1_PAIR3+
37 USB6+ USB7+ DDI3_CTRLDATA_AUX- DDI1_PAIR3-
38 USB_6_7_OC# USB_4_5_OC# DDI3_DDC_AUX_SEL RSVD
39 USB4- USB5- DDI3_PAIR0+ DDI2_PAIR0+
40 USB4+ USB5+ DDI3_PAIR0- DDI2_PAIR0-
41 GND(FIXED) GND(FIXED) GND(FIXED) GND(FIXED)
42 USB2- USB3- DDI3_PAIR1+ DDI2_PAIR1+
43 USB2+ USB3+ DDI3_PAIR1- DDI2_PAIR1-
44 USB_2_3_OC# USB_0_1_OC# DDI3_HPD DDI2_HPD
45 USB0- USB1- RSVD RSVD
46 USB0+ USB1+ DDI3_PAIR2+ DDI2_PAIR2+
47 VCC_RTC (Note3) EXCD1_PERST# DDI3_PAIR2- DDI2_PAIR2-

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Pin # CN1 – Row A CN1 – Row B CN2 – Row C CN2 – Row D
48 EXCD0_PERST# EXCD1_CPPE# RSVD RSVD
49 EXCD0_CPPE# SYS_RESET# DDI3_PAIR3+ DDI2_PAIR3+
50 LPC_SERIRQ CB_RESET# DDI3_PAIR3- DDI2_PAIR3-
51 GND(FIXED) GND(FIXED) GND(FIXED) GND(FIXED)
52 PCIE_TX5+ PCIE_RX5+ PEG_RX0+ PEG_TX0+
53 PCIE_TX5- PCIE_RX5- PEG_RX0- PEG_TX0-
54 GPI0 GPO1 TYPE0# PEG_LANE_RV#
55 PCIE_TX4+ PCIE_RX4+ PEG_RX1+ PEG_TX1+
56 PCIE_TX4- PCIE_RX4- PEG_RX1- PEG_TX1-
57 GND GPO2 TYPE1# TYPE2#
58 PCIE_TX3+ PCIE_RX3+ PEG_RX2+ PEG_TX2+
59 PCIE_TX3- PCIE_RX3- PEG_RX2- PEG_TX2-
60 GND(FIXED) GND(FIXED) GND(FIXED) GND(FIXED)
61 PCIE_TX2+ PCIE_RX2+ PEG_RX3+ PEG_TX3+
62 PCIE_TX2- PCIE_RX2- PEG_RX3- PEG_TX3-
63 GPI1 GPO3 RSVD RSVD
64 PCIE_TX1+ PCIE_RX1+ RSVD RSVD
65 PCIE_TX1- PCIE_RX1- PEG_RX4+ PEG_TX4+
66 GND WAKE0# PEG_RX4- PEG_TX4-
67 GPI2 WAKE1# RSVD GND
68 PCIE_TX0+ PCIE_RX0+ PEG_RX5+ PEG_TX5+
69 PCIE_TX0- PCIE_RX0- PEG_RX5- PEG_TX5-
70 GND(FIXED) GND(FIXED) GND(FIXED) GND(FIXED)
71 No Connect (Note3) No Connect (Note3) PEG_RX6+ PEG_TX6+
72 No Connect (Note3) No Connect (Note3) PEG_RX6- PEG_TX6-
73 No Connect (Note3) No Connect (Note3) GND GND
74 No Connect (Note3) No Connect (Note3) PEG_RX7+ PEG_TX7+
75 No Connect (Note3) No Connect (Note3) PEG_RX7- PEG_TX7-
76 No Connect (Note3) No Connect (Note3) GND GND
77 No Connect (Note3) No Connect (Note3) RSVD RSVD
78 No Connect (Note3) No Connect (Note3) PEG_RX8+ PEG_TX8+
79 No Connect (Note3) No Connect (Note3) PEG_RX8- PEG_TX8-
80 GND(FIXED) GND(FIXED) GND(FIXED) GND(FIXED)
81 No Connect (Note3) No Connect (Note3) PEG_RX9+ PEG_TX9+

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Pin # CN1 – Row A CN1 – Row B CN2 – Row C CN2 – Row D
82 No Connect (Note3) No Connect (Note3) PEG_RX9- PEG_TX9-
83 No Connect (Note3) No Connect (Note3) RSVD RSVD
84 No Connect (Note3) VCC_5V_SBY GND GND
85 GPI3 VCC_5V_SBY PEG_RX10+ PEG_TX10+
86 RSVD VCC_5V_SBY PEG_RX10- PEG_TX10-
87 RSVD VCC_5V_SBY GND GND
88 PCIE_CLK_REF+ BIOS_DIS1# PEG_RX11+ PEG_TX11+
89 PCIE_CLK_REF- VGA_RED PEG_RX11- PEG_TX11-
90 GND(FIXED) GND(FIXED) GND(FIXED) GND(FIXED)
91 SPI_POWER (3.3V) VGA_GRN PEG_RX12+ PEG_TX12+
92 SPI_MISO VGA_BLU PEG_RX12- PEG_TX12-
93 GPO0 VGA_HSYNC GND GND
94 SPI_CLK VGA_VSYNC PEG_RX13+ PEG_TX13+
95 SPI_MOSI VGA_I2C_CK PEG_RX13- PEG_TX13-
96 TPM_PP VGA_I2C_DAT GND GND
97 TYPE10# SPI_CS# RSVD RSVD
98 SER0_TX RSVD PEG_RX14+ PEG_TX14+
99 SER0_RX RSVD PEG_RX14- PEG_TX14-
100 GND(FIXED) GND(FIXED) GND(FIXED) GND(FIXED)
101 SER1_TX No Connect PEG_RX15+ PEG_TX15+
102 SER1_RX FAN_TACHIN PEG_RX15- PEG_TX15-
103 LID# No Connect GND GND
104 VCC_12V VCC_12V VCC_12V VCC_12V
105 VCC_12V VCC_12V VCC_12V VCC_12V
106 VCC_12V VCC_12V VCC_12V VCC_12V
107 VCC_12V VCC_12V VCC_12V VCC_12V
108 VCC_12V VCC_12V VCC_12V VCC_12V
109 VCC_12V VCC_12V VCC_12V VCC_12V
110 GND(FIXED) GND(FIXED) GND(FIXED) GND(FIXED)
Note 1: There are only 3 LED outputs for ACT#, LINK100# and LINK1000# which supplied
signals by the Ethernet controller on Module board.
Note 2: LVDS is not supported.
Note 3: DO NOT connect VBAT_RTC to GND directly, it may cause board damaging.

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2.3. Board Dimension
(Unit: mm)
Top view

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Bottom view

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2.4. Memory Module Installation
As memory modules are highly sensitive technical components, the use of ESD tools
and anti-static gloves or wristband is highly recommended.
Step 1: Align the memory module key along with the memory socket key.
Step 2: Hold the SO-DIMM module by the sides and slide it into slot SO-DIMM1 at
the appropriate angle, golden contacts rst.
Step 3: Insert the module carefully until the golden contacts are all inserted and
the module is snug in its slot. Press the memory downward until the lock/
ejector tabs engage and click into place.
SO-DIMM1

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2.5. Heat Spreader Installation
Step 1: Use 4 round-head screws to mount 4 standoffs onto the board.
Step 2: Paste appropriate amount of thermal grease and apply it evenly on CPU
chip. Please be careful not to touch with the parts on the board.
SO-DIMM1

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Step 3: Remove the thermal pad transparent lm on the heat spreader module,
and attach the board with its CPU facing the heat spreader module.
Please note that the fan and CPUFAN1 must be located at the same side.
Step 4: Use 4 at-head screws to tighten the board.
Step 5: Connect the cooling module fan connector to the header CPUFAN1 on
board. Please pay attention to connect to the bottom and its orientation.

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3. BIOS Settings
This chapter describes the BIOS menu displays and explains how to perform
common tasks needed to get the system up and running. It also gives detailed
explanation of the elements found in each of the BIOS menus. The following topics
are covered:
• Main Setup
• Advanced Setup
• Chipset Setup
• Boot Setup
• Security Setup
• Save & Exit Setup
Once you enter the Award BIOS™ CMOS Setup Utility, the Main Menu will appear
on the screen. Use the arrow keys to highlight the item and then use the <Pg Up>
<Pg Dn> keys to select the value you want in each item.
3.1. Main Setup
The BIOS setup main menu includes some options. Use the [Up/Down] arrow key to
highlight the option, and then press the [Enter] key to select the item and congure
the functions.
Aptio Setup Utility - Copyright (C) 2021 American Megatrends, Inc.
Version 2.20.1275. Copyright (C) 2021 American Megatrends, Inc.
→←: Select Screen
↑↓: Select Item
Enter: Select
+/-: Change Opt.
F1: General Help
F2: Previous Values
F3: Optimized Defaults
F4: Save & Exit
ESC: Exit
Main Advanced Chipset Boot Security Save & Exit
BIOS Information
BIOS Vendor
Core Version
Compliancy
Project Name
Release Version
Build Date and Time
Processor Information
Name
Type
Total Memory
Memory Frequency
Ststem Date
System Time
American Megatrends
5.13
UEFI 2.7; PI 1.6
ACM-XE21B6
V1.0
01/01/2021 00:00:00
Coffeelake Halo
Intel(R) Core(TM)
i7-9850HE CPU @ 2.70GHz
65536 MB
2400 MHz
[Fri 01/01/2021]
[00:00:00]
Set the Date. Use Tab to
switch between Date
elements.
Note: Listed at the bottom of the menu are the control keys. If you need any help with the
item elds, you can press <F1> key, and it will display the relevant information.

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• System Date
Set the system date.
• System Time
Set the system time.
3.2. Advanced Setup
Aptio Setup Utility - Copyright (C) 2021 American Megatrends, Inc.
Version 2.20.1275. Copyright (C) 2021 American Megatrends, Inc.
→←: Select Screen
↑↓: Select Item
Enter: Select
+/-: Change Opt.
F1: General Help
F2: Previous Values
F3: Optimized Defaults
F4: Save & Exit
ESC: Exit
Main Advanced Chipset Boot Security Save & Exit
W83627DHG HW Monitor
Serial Port Console Redirection
CSM Configuration
NVMe Configuration
USB Configuration
SATA Device Options
Settings
• W83627DHG HW Monitor
Dsiplay hardware monitor status.
• Serial Port Console Redirection
Console port setting.
• Network Stack Conguration
Network stack setting.
• CSM Conguration
Compatibility Support Module Conguration. Enable/Disable Option ROM execution
settings, etc.
• NVMe Conguration
Set NVMe conguration.
• USB Conguration
Set USB conguration parameters.

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3.2.1. W83627DHG HW Monitor
Aptio Setup Utility - Copyright (C) 2021 American Megatrends, Inc.
Version 2.20.1275. Copyright (C) 2021 American Megatrends, Inc.
→←: Select Screen
↑↓: Select Item
Enter: Select
+/-: Change Opt.
F1: General Help
F2: Previous Values
F3: Optimized Defaults
F4: Save & Exit
ESC: Exit
Advanced
Pc Health Status
Smart Fan Function
System temperature
Fan1 Speed
Fan3 Speed
VDDMEM
V1P05A_PCH
+5V
+12V
VCCP
3.3V
Enable or Disable Smart
Fan
[Enable]
: 32'C
: 6000 RPM
: 6000 RPM
: 0.992V
: +3.136V
: +3.136V
: +3.136V
: +3.136V
: +3.136V
• Smart Fan Function
Enable or Disable Smart Fan.
3.2.2. Serial Port Console Redirection
Aptio Setup Utility - Copyright (C) 2021 American Megatrends, Inc.
Version 2.20.1275. Copyright (C) 2021 American Megatrends, Inc.
→←: Select Screen
↑↓: Select Item
Enter: Select
+/-: Change Opt.
F1: General Help
F2: Previous Values
F3: Optimized Defaults
F4: Save & Exit
ESC: Exit
Advanced
COM 1
Console Redirection
Console Redirection Settings
[Enabled]
The setting specify how the
host computer and the
remote computer will
exchange data. Both
computers should have the
same or compatiable
settings.