Advantech SOM-5991 User manual

User Manual
SOM-5991

SOM-5991 User Manual ii
Copyright
The documentation and the software included with this product are copyrighted 2016
by Advantech Co., Ltd. All rights are reserved. Advantech Co., Ltd. reserves the right
to make improvements in the products described in this manual at any time without
notice. No part of this manual may be reproduced, copied, translated or transmitted
in any form or by any means without the prior written permission of Advantech Co.,
Ltd. Information provided in this manual is intended to be accurate and reliable. How-
ever, Advantech Co., Ltd. assumes no responsibility for its use, nor for any infringe-
ments of the rights of third parties, which may result from its use.
Acknowledgements
Intel and Pentium are trademarks of Intel Corporation.
Microsoft Windows and MS-DOS are registered trademarks of Microsoft Corp.
All other product names or trademarks are properties of their respective owners.
Product Warranty (2 years)
Advantech warrants to you, the original purchaser, that each of its products will be
free from defects in materials and workmanship for two years from the date of pur-
chase.
This warranty does not apply to any products which have been repaired or altered by
persons other than repair personnel authorized by Advantech, or which have been
subject to misuse, abuse, accident or improper installation. Advantech assumes no
liability under the terms of this warranty as a consequence of such events.
Because of Advantech’s high quality-control standards and rigorous testing, most of
our customers never need to use our repair service. If an Advantech product is defec-
tive, it will be repaired or replaced at no charge during the warranty period. For out-
of-warranty repairs, you will be billed according to the cost of replacement materials,
service time and freight. Please consult your dealer for more details.
If you think you have a defective product, follow these steps:
1. Collect all the information about the problem encountered. (For example, CPU
speed, Advantech products used, other hardware and software used, etc.) Note
anything abnormal and list any onscreen messages you get when the problem
occurs.
2. Call your dealer and describe the problem. Please have your manual, product,
and any helpful information readily available.
3. If your product is diagnosed as defective, obtain an RMA (return merchandize
authorization) number from your dealer. This allows us to process your return
more quickly.
4. Carefully pack the defective product, a fully-completed Repair and Replacement
Order Card and a photocopy proof of purchase date (such as your sales receipt)
in a shippable container. A product returned without proof of the purchase date
is not eligible for warranty service.
5. Write the RMA number visibly on the outside of the package and ship it prepaid
to your dealer.
Part No. 2006599100 Edition 1
Printed in China December 2016

iii SOM-5991 User Manual
Declaration of Conformity
CE
This product has passed the CE test for environmental specifications. Test conditions
for passing included the equipment being operated within an industrial enclosure. In
order to protect the product from being damaged by ESD (Electrostatic Discharge)
and EMI leakage, we strongly recommend the use of CE-compliant industrial enclo-
sure products.
FCC Class B
Note: This equipment has been tested and found to comply with the limits for a Class
B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference in a residential installa-
tion. This equipment generates, uses and can radiate radio frequency energy and, if
not installed and used in accordance with the instructions, may cause harmful inter-
ference to radio communications. However, there is no guarantee that interference
will not occur in a particular installation. If this equipment does cause harmful interfer-
ence to radio or television reception, which can be determined by turning the equip-
ment off and on, the user is encouraged to try to correct the interference by one or
more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
FM
This equipment has passed the FM certification. According to the National Fire Pro-
tection Association, work sites are classified into different classes, divisions and
groups, based on hazard considerations. This equipment is compliant with the speci-
fications of Class I, Division 2, Groups A, B, C and D indoor hazards.
Technical Support and Assistance
1. Visit the Advantech website at http://support.advantech.com where you can find
the latest information about the product.
2. Contact your distributor, sales representative, or Advantech's customer service
center for technical support if you need additional assistance. Please have the
following information ready before you call:
–Product name and serial number
–Description of your peripheral attachments
–Description of your software (operating system, version, application software,
etc.)
–A complete description of the problem
–The exact wording of any error messages

SOM-5991 User Manual iv
Warnings, Cautions and Notes
Document Feedback
To assist us in making improvements to this manual, we would welcome comments
and constructive criticism. Please send all such - in writing to: support@advan-
tech.com
Packing List
Before setting up the system, check that the items listed below are included and in
good condition. If any item does not accord with the table, please contact your dealer
immediately.
Item 1 x SOM-5991 CPU module
Box 1 x Heat spreader
Safety Instructions
1. Read these safety instructions carefully.
2. Keep this User Manual for later reference.
3. Disconnect this equipment from any AC outlet before cleaning. Use a damp
cloth. Do not use liquid or spray detergents for cleaning.
4. For plug-in equipment, the power outlet socket must be located near the equip-
ment and must be easily accessible.
5. Keep this equipment away from humidity.
6. Put this equipment on a reliable surface during installation. Dropping it or letting
it fall may cause damage.
7. The openings on the enclosure are for air convection. Protect the equipment
from overheating. DO NOT COVER THE OPENINGS.
8. Make sure the voltage of the power source is correct before connecting the
equipment to the power outlet.
Warning! Warnings indicate conditions, which if not observed, can cause personal
injury!
Caution! Cautions are included to help you avoid damaging hardware or losing
data. e.g.
There is a danger of a new battery exploding if it is incorrectly installed.
Do not attempt to recharge, force open, or heat the battery. Replace the
battery only with the same or equivalent type recommended by the man-
ufacturer. Discard used batteries according to the manufacturer's
instructions.
Note! Notes provide optional additional information.

v SOM-5991 User Manual
9. Position the power cord so that people cannot step on it. Do not place anything
over the power cord.
10. All cautions and warnings on the equipment should be noted.
11. If the equipment is not used for a long time, disconnect it from the power source
to avoid damage by transient overvoltage.
12. Never pour any liquid into an opening. This may cause fire or electrical shock.
13. Never open the equipment. For safety reasons, the equipment should be
opened only by qualified service personnel.
14. If one of the following situations arises, get the equipment checked by service
personnel:
The power cord or plug is damaged.
Liquid has penetrated into the equipment.
The equipment has been exposed to moisture.
The equipment does not work well, or you cannot get it to work according to
the user's manual.
The equipment has been dropped and damaged.
The equipment has obvious signs of breakage.
15. DO NOT LEAVE THIS EQUIPMENT IN AN ENVIRONMENT WHERE THE
STORAGE TEMPERATURE MAY GO BELOW -20° C (-4° F) OR ABOVE 60° C
(140° F). THIS COULD DAMAGE THE EQUIPMENT. THE EQUIPMENT
SHOULD BE IN A CONTROLLED ENVIRONMENT.
16. CAUTION: DANGER OF EXPLOSION IF BATTERY IS INCORRECTLY
REPLACED. REPLACE ONLY WITH THE SAME OR EQUIVALENT TYPE
RECOMMENDED BY THE MANUFACTURER, DISCARD USED BATTERIES
ACCORDING TO THE MANUFACTURER'S INSTRUCTIONS.
The sound pressure level at the operator's position according to IEC 704-1:1982 is
no more than 70 dB (A).
DISCLAIMER: This set of instructions is given according to IEC 704-1. Advantech
disclaims all responsibility for the accuracy of any statements contained herein.

SOM-5991 User Manual vi
Safety Precaution - Static Electricity
Follow these simple precautions to protect yourself from harm and the products from
damage.
To avoid electrical shock, always disconnect the power from your PC chassis
before you work on it. Don't touch any components on the CPU card or other
cards while the PC is on.
Disconnect power before making any configuration changes. The sudden rush
of power as you connect a jumper or install a card may damage sensitive elec-
tronic components.

vii SOM-5991 User Manual
Contents
Chapter 1 General Information ............................1
1.1 Introduction ............................................................................................... 2
Table 1.1: Acronyms.................................................................... 3
1.2 Functional Block Diagram ......................................................................... 4
1.3 Product Specification ................................................................................ 5
1.3.1 Compliance ................................................................................... 5
1.3.2 Feature List ................................................................................... 5
1.3.3 Processor System......................................................................... 6
1.3.4 Memory ......................................................................................... 6
1.3.5 Graphics / Audio ........................................................................... 6
1.3.6 Expansion Interface ...................................................................... 6
Chapter 2 Mechanical Information ....................13
2.1 Board Information.................................................................................... 14
Figure 2.1 Board chips identify – Front...................................... 14
Figure 2.2 Board chips identify – Back ...................................... 14
2.1.1 Connector List............................................................................. 15
Table 2.1: FAN1 Fan ................................................................. 15
2.2 Mechanical Drawing................................................................................ 15
Figure 2.3 Board Mechanical Drawing - Front ........................... 15
Figure 2.4 Board Mechanical Drawing – Back........................... 16
Figure 2.5 Board Mechanical Drawing – Side ........................... 16
2.3 Assembly Drawing .................................................................................. 17
Figure 2.6 Assembly Drawing.................................................... 17
2.4 Assembly Drawing .................................................................................. 17
Figure 2.7 Main Chip Height and Tolerance .............................. 17
Chapter 3 AMI BIOS ............................................19
3.1 Introduction ............................................................................................. 20
Figure 3.1 Setup program initial screen..................................... 20
3.2 Entering Setup ........................................................................................ 21
3.2.1 Main Setup.................................................................................. 21
Figure 3.2 Main setup screen .................................................... 21
3.2.2 Advanced BIOS Features Setup................................................. 22
Figure 3.3 Advanced BIOS features setup screen .................... 22
Figure 3.4 Trusted Computing ................................................... 23
Figure 3.5 ACPI Settings ........................................................... 24
Figure 3.6 iManager Configuration ............................................ 25
Figure 3.7 Serial Port 1 Configuration ....................................... 26
Figure 3.8 Serial Port 2 Configuration ....................................... 27
Figure 3.9 Hardware Monitor ..................................................... 28
Figure 3.10Serial Port Console Redirection ............................... 29
Figure 3.11PCI Subsystem Settings........................................... 30
Figure 3.12Network Stack Configurations .................................. 31
Figure 3.13CSM Configuration ................................................... 32
Figure 3.14NVMe Configuration ................................................. 33
Figure 3.15USB Configuration.................................................... 34
3.2.3 IntelRCSetup............................................................................... 36
Figure 3.16Intel RCSetup ........................................................... 36
Figure 3.17Processor Configuration -1....................................... 37
Figure 3.18Processor Configuration -2....................................... 37

SOM-5991 User Manual viii
Figure 3.19Advanced Power Management Configuration.......... 39
Figure 3.20CPU P State Control ................................................ 40
Figure 3.21XE Ratio Limit........................................................... 41
Figure 3.22CPU C State Control ................................................ 42
Figure 3.23CPU T State Control................................................. 43
Figure 3.24CPU Thermal Management...................................... 44
Figure 3.25CPU Advanced PM Turning ..................................... 45
Figure 3.26DRAM RAPL Configuration ...................................... 46
Figure 3.27SOCKET RAPL Config............................................. 47
Figure 3.28Common RefCode Configuration ............................. 48
Figure 3.29Memory Configuration -1.......................................... 49
Figure 3.30Memory Configuration -2.......................................... 51
Figure 3.31Memory Topology..................................................... 53
Figure 3.32Memory Thermal ...................................................... 54
Figure 3.33Memory Power Savings Advanced Options ............. 55
Figure 3.34Memory Timings & Voltage Override ....................... 56
Figure 3.35Memory Map ............................................................ 57
Figure 3.36Memory RAS Configuration...................................... 58
Figure 3.37IIO Configuration ...................................................... 59
Figure 3.38IIO Configuration ...................................................... 60
Figure 3.39Socket 0 PcieD01F1 – Port 1B (Intel i210 Giga Lan)61
Figure 3.40Socket 0 PcieD01F2 – Port 2A................................. 62
Figure 3.41Socket 0 PcieD02F2 – Port 2C ................................ 63
Figure 3.42Socket 0 PcieD03F0 – Port 3A................................. 64
Figure 3.43IOAT Configuration................................................... 65
Figure 3.44IIO General Configuration ........................................ 66
Figure 3.45Intel VT for Directed I/O (VT-d) ................................ 67
Figure 3.46IIO South Complex Configuration............................. 68
Figure 3.47PCH Configuration ................................................... 69
Figure 3.48PCH Devices ............................................................ 70
Figure 3.49PCH Express Configuration ..................................... 71
Figure 3.50PCH SATA Configuration ......................................... 72
Figure 3.51USB Configuration.................................................... 73
Figure 3.52Secutiry Configuration .............................................. 74
Figure 3.53Azalia Configuration ................................................. 75
Figure 3.54Miscellaneous Configuration .................................... 76
Figure 3.55Server ME Configuration .......................................... 77
Figure 3.56Runtime Error Logging ............................................. 78
Figure 3.57Reserve Memory ...................................................... 79
3.2.4 Server Mgmt ............................................................................... 80
Figure 3.58Server Mgmt............................................................. 80
Figure 3.59System Event Log .................................................... 81
Figure 3.60BMC self test log ...................................................... 82
Figure 3.61BMC network configuration ...................................... 83
Figure 3.62View System configuration ....................................... 84
Figure 3.63BMC User Settings................................................... 85
3.2.5 Security....................................................................................... 86
Figure 3.64Security .................................................................... 86
3.2.6 Boot ............................................................................................ 87
Figure 3.65Boot .......................................................................... 87
3.2.7 Event Logs.................................................................................. 88
Figure 3.66Event Logs ............................................................... 88
3.2.8 Save & Exit ................................................................................. 89
Figure 3.67Save & Exit............................................................... 89
Chapter 4 S/W Introduction & Installation........ 91
4.1 S/W Introduction ..................................................................................... 92
4.2 Driver Installation .................................................................................... 92

ix SOM-5991 User Manual
4.2.1 Windows Driver Setup ................................................................ 92
4.2.2 Other OS..................................................................................... 92
4.3 Advantech iManager ............................................................................... 92
4.3.1 Control ........................................................................................ 93
4.3.2 Display ........................................................................................ 93
4.3.3 Monitor ........................................................................................ 94
4.3.4 Power Saving.............................................................................. 94
Appendix A Pin Assignment .................................95
A.1 SOM-5991 Type 6 Pin Assignment......................................................... 96
Appendix B Watchdog Timer ..............................101
B.1 Programming the Watchdog Timer ....................................................... 102
Appendix C Programming GPIO .........................103
C.1 GPIO Register....................................................................................... 104
Appendix D System Assignments ......................105
D.1 System I/O Ports ................................................................................... 106
Table D.1: System I/O ports..................................................... 106
D.2 DMA Channel Assignments .................................................................. 107
Table D.2: DMA Channel Assignments.................................... 107
D.3 Interrupt Assignments ........................................................................... 107
Table D.3: Interrupt Assignments............................................. 107
D.4 1st MB Memory Map ............................................................................. 108
Table D.4: 1st MB Memory Map .............................................. 108

SOM-5991 User Manual x

Chapter 1
1General Information
This chapter gives background
information on the SOM-5991 CPU
Computer on Module
Sections include:
Introduction
Functional Block Diagram
Product Specification

SOM-5991 User Manual 2
1.1 Introduction
SOM-5991, designed around the Intel® Xeon® Processor D-1500 family, brings the
performance and advanced intelligence of Intel® Xeon® processors into a dense,
low-power system-on-a-chip. With enhanced reliability, availability, and serviceability
features; platform storage extensions; and built-in hardware virtualization; the Intel®
Xeon® processor D-1500 product family offers new options for optimizing a variety of
workloads and infrastructure for midrange routers, network appliances, security
appliances, wireless base stations, embedded midrange IoT devices, entry network-
ing, midrange storage area networks (SANs), network attached storage (NAS) appli-
ances, warm cloud storage, and more.
In a breakthrough move, the SOM-5991 incorporates two 10GBase-KR interfaces,
which should help fulfill the ever-increasing service application demands in the area
of COM Express. Customers can take advantage of SOM-5991's native 10GBase-
KR interfaces to design in 10GbE carrier boards. SOM-5991 and its development
board are ready for customers as a reference design.
PCIe x16 and 8 PCIe x1 support Non-Transparent Bridge (NTB), which allows redun-
dancy via PCIe. This helps reduce data loss, allowing a secondary system to take
over PCIe storage devices if the CPU fails, and it provides high availability for appli-
cations providing continuous service.
SOM-5991 has four screw holes near the CPU, positioned in compliance with the
Intel® standard thermal design guide. The thermal module is attached to the CPU
using a balanced torque design, it is the first COM Express with added a backplane
to increase rigidity so the thermal module makes tight contact with the CPU without
board bending. This results in highly efficient heat dissipation with outstanding com-
puting performance. Advantech also offers a SOM-5991 pre-assembly thermal solu-
tion service that can make system-level assembly easier.

3 SOM-5991 User Manual
Chapter 1 General Information
Table 1.1: Acronyms
Term Define
AC’97 Audio CODEC (Coder-Decoder)
ACPI Advanced Configuration Power Interface – standard to implement
power saving modes in PC-AT systems
BIOS
Basic Input Output System – firmware in PC-AT system that is
used to initialize system components before handing control over
to the operating system
CAN
Controller-area network (CAN or CAN-bus) is a vehicle bus stan-
dard designed to allow microcontrollers to communicate with each
other within a vehicle without a host computer
DDI Digital Display Interface – containing DisplayPort, HDMI/DVI, and
SDVO
EAPI
Embedded Application Programmable Interface
Software interface for COM Express® specific industrial function
System information
Watchdog timer
I2C Bus
Flat Panel brightness control
User storage area
GPIO
GbE Gigabit Ethernet
GPIO General purpose input output
HDA
Intel High Definition Audio (HD Audio) refers to the specification
released by Intel in 2004 for delivering high definition audio that is
capable of playing back more channels at higher quality than
AC’97
I2C
Inter Integrated Circuit – 2 wire (clock and data) signaling scheme
allowing communication between integrated circuit, primarily used
to read and load register values
ME Management Engine
PC-AT “Personal Computer – Advanced Technology” – an IBM trademark
term used to refer to Intel based personal computer in 1990s
PEG PCI Express Graphics
RTC
Real Time Clock – battery backed circuit in PC-AT systems that
keeps system time and date as well as certain system setup
parameters
SPD Serial Presence Detect – refers to serial EEPROM on DRAMs that
has DRAM Module configuration information
TPM Trusted Platform Module, chip to enhance the security features of a
computer system
UEFI Unified Extensible Firmware Interface
WDT Watch Dog Timer

SOM-5991 User Manual 4
1.2 Functional Block Diagram

5 SOM-5991 User Manual
Chapter 1 General Information
1.3 Product Specification
1.3.1 Compliance
PICMG COM.0 (COM Express) Revision 2.1
Basic Size – 125 x 95mm
Pin-out Type 6 compatible
1.3.2 Feature List
Feature Type Connector
Row Feature
Type 6 Define
SOM-5991
Max. Min.
Display
A-B LVDS Channel A (18/24-bit) 1 0 0
A-B LVDS Channel B (18/24-bit) 1 0 0
A-B eDP (muxed on LVDS Channel A) 1 0 0
A-B VGA 1 0 0
Expansion A-B PCI Express x1 6 1 6
A-B LPC 1 1 1
Serial
A-B SMBus 1 1 1
A-B I2C Bus 1 1 1
A-B Serial Port 2 0 2
A-B CAN Bus (muxed on SER1) 1 0 0
I/O
A-B LAN Port 0 (Gigabit Ethernet) 1 1 1
A-B SATA 4 1 4
A-B USB2.0 8 4 4
A-B USB Client 1 0 0
A-B HD Audio 1 0 0
A-B SPI Bus 2 1 1
A-B General Purpose I/O (GPIO) 8 8 8
A-B SDIO (muxed on GPIO) 1 0 0
A-B Express Card Support 2 1 2
A-B Watchdog Timer Output 1 0 1
A-B Speaker Out 1 1 1
A-B External BIOS ROM Support 2 0 2
A-B Power Button Support 1 1 1
A-B Power Good 1 1 1
A-B VCC_5V_SBY Contacts 4 4 4
A-B Sleep 1 0 1
A-B Thermal Protection 1 0 1
A-B Lid Input 1 0 1
A-B Battery Low Alarm 1 0 1
A-B Suspend/Wake Signals 3 0 3
A-B Fan PWM / Tachometer 2 0 2
A-B Trusted Platform Modules 1 0 1
Display C-D Digital Display Interfaces 1 - 3 3 0 0
I/O
C-D PEG (PCI Express x16) 1 0 1
C-D PCI Express x1 2 0 2
C-D USB3.0 4 0 4

SOM-5991 User Manual 6
1.3.3 Processor System
1.3.4 Memory
Dual channels 2 sockets support DDR4 2400MHz up to 32GB (supported ECC)
Maximum support 16G + 16G on each socket
1.3.5 Graphics / Audio
Intel® Xeon® Processor D Family is without graphics. SOM-5991 does not support
display and audio. For graphics behavior, it will be defined according to specific user
scenario based on system specification. Please contact to Advantech sales or FAE
for more detail.
1.3.6 Expansion Interface
1.3.6.1 PCIe x16
Intel Xeon® Processor D natively integrates 1 x16 PCI Express interface supports up
to 4 devices at up to Gen3 speeds (8 GHz). SOM-5991 supports 1 PCIe x16, and is
configurable to 2 x8, 1 x8 & 2 x4, or 4 x4.
1.3.6.2 PCIe x1
Intel Xeon® Processor D natively integrates 8 PCI Express x1 lanes and up to 8
devices, which support up to Gen2 (5.0 Gb/s). SOM-5991 supports 8 PCIe x1 by
default, and is configurable to three options in the following table.
1.3.6.3 LPC
Supports Low Pin Count (LPC) 1.1 specification, without DMA or bus mastering. All-
Connects to Super I/O, embedded controller, or TPM. LPC clock is 25MHz.
1.3.6.4 Serial Bus
SMBus
Supports SMBus 2.0 specification with Alert pin.
I2C Bus
Supports I2C bus 8-bit and 10-bit address modes, at both 100KHz and 400KHz.
CPU Std. Freq. Max. Turbo Freq. Core/Thread LLC Cache TDP(W)
Xeon D-1548 2.0 GHz 2.6 GHz 8/16 12 MB 45 W
Pentium D1508 2.2 GHz 2.6 GHz 2/4 3 MB 25 W
Type 6
Row A,B Row C,D
P0 P1 P2 P3 P4 P5 P6 P7
Default
Config.
X1 X1 X1 X1 X1 X1 X1 X1
Option 1 X1 X1 X2 X1 X1 X2
Option 2 X2 X2 X2 X2
Option 3 X4 X4

7 SOM-5991 User Manual
Chapter 1 General Information
1.3.6.5 I/O
Gigabit Ethernet
On-module Intel i210AT supports IEEE802.3 for 1000BASE-T, 100BASE-TX,
and 10BASE-T (802.3, 802.3u, and 802.3ab). Supports IPv4, IPv6, TCP/UDP,
SCTP, ARP, Neighbor Discovery, EUI-64.
SATA
Support 4 ports SATA Gen3 (6.0 Gb/s), backward compliant to SATA Gen2 (3.0
Gb/s) and Gen1 (1.5 Gb/s). Maximum data rate is 600 MB/s. Supports AHCI 1.3
mode.
USB3.0/USB2.0
4 ports USB3.0 (5.0 Gbps) and 4 ports USB2.0 (480 Mbps) which are backward
compatible to USB1.x. For USB3.0, supports LPM (U0, U1, U2, and U3) man-
ageability to saving power.
USB3.0
USB2.0
SPI Bus
Supports BIOS flash only. SPI clock can be 50MHz, 33MHz, or 20MHz, capacity
up to 16MB.
GPIO
8 programmable general purpose Input or output (GPIO).
Watchdog
Supports multi-level watchdog time-out output. Provides 1-65535 level, from
100ms to 109.22 minutes interval.
Serial port
2 ports, 2-wire serial port (Tx/Rx) supports 16550 UART compliance.
–Programmable FIFO or character mode
–16-byte FIFO buffer on transmitter and receiver in FIFO mode
–Programmable serial-interface characteristics: 5, 6, 7, or 8-bit character
–Even, odd, or no parity bit selectable
–1, 1.5, or 2 stop bit selectable
–Baud rate up to 115.2K
Express Card
2 sets of Express Card control signals including card detection and reset, fol-
lows PICMG COM Express R2.1 specification.
TPM
Supports TPM 2.0 module by default.
Smart Fan
Supports two Fan PWM control signal and two tachometer input for fan speed
detection. Provides one on module with connector and the other to carrier board
follow by PICMG COM Express R2.1 specification.
Type 6 P0 P1 P2 P3
SoC P0 P1 P2 P3
Type 6 OC_01 OC_23
SoC USB_OC# OC_0 OC_2
Type 6 P0 P1 P2 P3
SoC P0 P1 P2 P3
Type 6 OC_01 OC_23
SoC USB_OC# OC_0 OC_2

SOM-5991 User Manual 8
BIOS
BIOS chip is on module by default. Also allows user to place BIOS chip on car-
rier board with appropriate design and jumper setting on BIOS_DIS#[1:0].
1.3.6.6 Power Management
Power Supply
Supports both ATX and AT power modes. VSB is for suspend power and can be
an option if not requiring standby (suspend-to-RAM) support. RTC Battery may
be option if keep time/date is not required.
VCC: 8.5V (9V-5%) – 20V (19V+5%)
VSB: 5V +/- 5% (Suspend power)
RTC Battery Power: 2.0V – 3.3V
PWROK
Power OK from main power supply. A high value indicates that the power is
good. This signal can be used to hold off Module startup to allow Carrier based
FPGAs or other configurable devices time to be programmed.
Power Sequence
According to PICMG COM Express R2.1 specification
Wake Event
Various wake-up events allow users to apply different scenarios.
Wake-on-LAN(WOL): Wake to S0 from S3/S4/S5
USB Wake: Wake to S0 from S3/S4
PCIe Device Wake: depends on user inquiry and may need customized BIOS
LPC Wake: depends on user inquiry and may need customized BIOS
Advantech S5 ECO Mode (Deep Sleep Mode)
Advantech iManager provides an additional feature to allow the system enter a
very low suspend power mode – S5 ECO mode. In this mode, the module will
cut all power including suspend and active power into the chipset and keep the
on-module controller active. Therefore, only less than 50mW power will be con-
sumed which means the user’s battery pack can last longer. With this mode
enabled in BIOS, the system (or module) will only allow a power button to boot
rather than others such as WOL.
BIOS_DIS0# BIOS_DIS#1 Boot up destination/function
Open Open Boot from Module’s SPI BIOS
GND Open Boot from Carrier Board LPC/FWH BIOS
Open GND SPI_CS0# to Carrier Board, SPI_CS1# to Module
GND GND SPI_CS0# to Module, SPI_CS1# to Carrier Board
Note! If system COMS are cleared, we strongly suggest you to go into the
BIOS setup menu and load the default setting at the first time of boot up.

9 SOM-5991 User Manual
Chapter 1 General Information
1.3.6.7 Environment
Temperature
Operating: 0 ~ 60° C (32 ~ 140° F), with an active heat sink under 0.7m/s air
flow chamber
Storage: -40 ~ 85° C (-40 ~ 185° F
Humidity
Operating: 40° C @ 95% relative humidity, non-condensing
Storage: 60° C @ 95% relative humidity, non-condensing
Vibrations
IEC60068-2-64: Random vibration test under operation mode, 3.5Grms
Drop Test (Shock)
Federal Standard 101 Method 5007 test procedure with standard packing
EMC
CE EN55022 Class B and FCC Certifications: validate with standard develop-
ment boards in Advantech chassis
1.3.6.8 MTBF
Please refer to Advantech SOM-5991 Series Reliability Prediction Report No:
16R323A0.
1.3.6.9 OS Support (duplicate with SW chapter)
The mission of Advantech Embedded Software Services is to "Enhance quality of life
with Advantech platforms and Microsoft Windows embedded technology." We enable
Windows Embedded software products on Advantech platforms to more effectively
support the embedded computing community. Customers are freed from the hassle
of dealing with multiple vendors (Hardware suppliers, System integrators, Embedded
OS distributor) for projects. Our goal is to make Windows Embedded Software solu-
tions easily and widely available to the embedded computing community.
To install the drivers for Linux or other OS, please connect to the internet and browse
the website http://support.advantech.com.tw to download the setup file.
1.3.6.10 Advantech iManager
Supports APIs for GPIO, smart fan control, multi-stage watchdog timer and output,
temperature sensor, hardware monitor, etc. Follows the PICMG EAPI 1.0 specifica-
tion that provides backward compatibility.

SOM-5991 User Manual 10
1.3.6.11 Power Consumption
Hardware Configurations:
1. MB: SOM-5991X8-U0A1E (PCB_A101-3)
2. DRAM: 8GB DDR4 2133MHz *2
3. Carrier board: SOM-DB5900_A101-2
Test Condition:
1. Test temperature: room temperature
2. Test voltage: rated voltage DC +12.0V
3. Test loading:
3.1 Maximum load mode: According to Intel thermal/power test tools
3.2 Burn-in mode: Passmark Burn-in Test v8.1 Pro with appropriate load setting
3.3 Idle mode: DUT power management off and no running any program.
4. OS: Server 2012 R2
1.3.6.12 Performance
For reference performance or benchmark data that compare with other modules,
please refer to “Advantech COM Performance & Power Consumption Table”.
1.3.6.13 Selection Guide w/ P/N
1.3.6.14 Packing list
1.3.6.15 Development Board
1.3.6.16 Optional Accessory
Power Consumption Table (Watt.)
VCC=12V, VSB=5V Active Power Domain Suspend Power
Domain
Mechanical
off
Power State S0 Max. Load S0 Burn-in S0 Idle S5 S5 ECO RTC (uA)
SOM-5991X8-U0A1E 55.5W 48.7W 11.0W 1.97W 0.025W 4.41uA
Part No. CPU Core Freq. CPU
TDP LLC DDR4 SODIMM
Giga
LAN
10GBase
-KR
PEG
x16
PCI2
x1
USB
2.0
USB
3.0
SATA
III LPC Power Thermal Solution
Operating
Temp.
SOM-
5991XB-
U0A1E
Xeon
D-1548 82.045W12MB
ECC/non
ECC 1 2 1 8 4 4 4 Yes AT/ATX Active 0 ~ 60° C
Part No. Description Quantity
- SOM-5991 CPU module 1
1960077016N001 Heatspreader 1
Part No. Description
SOM-DB5900-00A1E COMe Devel.Board w/10GB I/O pin-out
Part No. Description