Dolphin MXH912 User manual

Users Guide-MXH912 1
©Copyright 2020-2023 Dolphin Interconnect Solution. All rights reserved.
Dolphin PCI Express MXH912 Adapter
MXH912 Transparent Host Adapter Users Guide
Version 1.0
Date: 4nd October 2023

Users Guide-MXH912 2
©Copyright 2020-2023 Dolphin Interconnect Solution. All rights reserved.
Table of Contents
1. DISCLAIMER......................................................................................................................................................... 4
2. TERMS AND ACRONYMS...................................................................................................................................... 5
3. TECHNICAL INFORMATION .................................................................................................................................. 5
3.1 BOARD REVISION HISTORY ...........................................................................................................................................5
3.2 HIGH-LEVEL SPECIFICATION.........................................................................................................................................6
3.3 SIMPLIFIED SCHEMATICS .............................................................................................................................................7
3.4 PCIE SLOT DETERMINATION ........................................................................................................................................7
3.5 AIRFLOW -OPERATING ENVIRONMENT.......................................................................................................................... 7
4INSTALLATION ..................................................................................................................................................... 8
4.1 BOARD UNPACKING...................................................................................................................................................8
4.2 CHANGE PCIE BRACKET..............................................................................................................................................8
4.3 CONFIGURE THE BOARD..............................................................................................................................................9
4.4 INSTALL THE ADAPTER CARD........................................................................................................................................9
4.5 INSTALLING AND REMOVING THE CABLE.........................................................................................................................9
4.5.1 Connecting the Cable..................................................................................................................................... 9
4.5.2 Cable strain relief .......................................................................................................................................... 9
4.5.3 Disconnecting the Cable ................................................................................................................................ 9
4.6 INSTALLING THE DOLPHIN BOARD MANAGEMENT SOFTWARE ..........................................................................................10
4.7 VERIFY INSTALLATION &LEDS...................................................................................................................................10
5OPERATION ........................................................................................................................................................11
5.1 CONFIGURATION AND DIP SWITCH ............................................................................................................................. 11
5.2 DIP SWITCH TRANSPARENT SETTINGS..........................................................................................................................11
5.3 USE CASE -TRANSPARENT HOST MODE .......................................................................................................................12
5.4 FIRMWARE UPGRADE...............................................................................................................................................12
5.5 IDENTIFYING THE CARD............................................................................................................................................. 12
6PCIE CABLE PORT ................................................................................................................................................14
6.1 PCIE CABLE SIGNALS................................................................................................................................................ 14
6.2 PCIE CABLE CONNECTOR X8PIN-OUT......................................................................................................................... 15
7COMPLIANCE AND REGULATORY TESTING..........................................................................................................15
7.1 EMC COMPLIANCE..................................................................................................................................................15
7.2 FCC CLASS A..........................................................................................................................................................15
7.3 ROHS COMPLIANCE.................................................................................................................................................16
7.4 WEEE NOTICE .......................................................................................................................................................16
8LIMITED WARRANTY...........................................................................................................................................16
8.1 WARRANTY PERIOD .................................................................................................................................................16
8.2 COVERAGE .............................................................................................................................................................16
8.3 SERVICE PROCEDURE................................................................................................................................................16

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Figure 1: MXH912 Simplified Schematics ................................................................................................................................................7
Figure 2: Full length PCIe bracket ............................................................................................................................................................8
Figure 3: DIP Switch (Shipping Default) .................................................................................................................................................11
Figure 4:Transparent topology ..............................................................................................................................................................12
Table 1:Revision History ..........................................................................................................................................................................5
Table 2:MXH912 Product High-Level Specifications................................................................................................................................6
Table 3: LED behaviors ..........................................................................................................................................................................10
Table 4: DIP Switch Transparent settings for MXH912..........................................................................................................................11
Table 5:PCIe Cable Port Signals .............................................................................................................................................................14
Table 6: External PCIe x8 cable pin-out .................................................................................................................................................15

Users Guide-MXH912 4
©Copyright 2020-2023 Dolphin Interconnect Solution. All rights reserved.
1. DISCLAIMER
DOLPHIN INTERCONNECT SOLUTIONS RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO
ANY OF ITS PRODUCTS TO IMPROVE RELIABILITY, FUNCTION, OR DESIGN.
DO NOT USE THE INFORMATION IN THIS GUIDE TO DESIGN YOUR PCI-SIG-COMPLIANT PRODUCT; ALWAYS
REFERENCE THE ORIGINAL PCI-SIG SPECIFICATION FOR DETAILS.
TO THE FULLEST EXTENT PERMITTED BY LAW, DOLPHIN WILL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL,
SPECIAL OR CONSEQUENTIAL DAMAGES (INCLUDING LOST PROFITS, LOST DATA, OR LOSS OF USE) ARISING OUT OF
ANY USE OF DOLPHIN’S PRODUCTS, SOFTWARE OR SERVICE PROVIDED. DOLPHIN’S MAXIMUM LIABILITY WILL NOT
EXCEED THE TOTAL AMOUNT PAID FOR THE PRODUCT BY THE PURCHASER.
LIFE SUPPORT POLICY
DOLPHIN INTERCONNECT SOLUTIONS’ PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN
LIFE SUPPORT DEVICES.
ENVIRONMENTAL POLICY
Dolphin is minimizing the amount of printed documentation and software CDs in its shipments; please download
additional documentation and software from www.dolphinics.com.

Users Guide-MXH912 5
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2. Terms and acronyms
The following are Essential terms and acronyms used in this manual.
eXpressWare
Dolphin’s software stack for PCIe clustering and IO. Please visit www.dolphinics.com/software
for more information.
Host mode
The card installs in a root complex / Host PC.
Lane
One PCI Express Lane contains a differential pair for transmission and a differential pair for
reception.
Link
A collection of one or more PCI Express Lanes provides the communication path between an
Upstream and Downstream Port.
Port
PCIe Cable port. The MXH912 x8 iPass™or standard PCI Express cable.
3. Technical Information
3.1 Board revision history
The following table gives a general overview of the hardware revision history. Please consult the MXH912 PCN available from
Dolphin for details.
Adapter card revision
Capabilities
MXH912-BC
•Initial product version
Table 1:Revision History

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3.2 High-Level Specification
The table presented below provides an overview of the high-level specifications.
Form Factor
PCIe Half-Length, Half-Height
Dimension
116.23mm (4.57 inches) x 68.90 mm (2.731 inches).
Configuration
Transparent MXH912 as Host
Link To
PXH812 and customer target device
Storage Temperature
Storage Temperature: -40°C to 70°C (-40°F to 158°F)
PCI Express®
Base Specification 3.0
Card Electromechanical Specification 3.0
External Cabling Specification Spec 2.0
Operating Temperature
0°C to 55°C (32°F - 131°F)
Airflow
350 LFM
Operating Humidity
Relative humidity 5% - 95% non-condensing
Switch
PM40028B Switchtec PCI Express
Max operating altitude
2000m
Power
Power Rail
Typical Current
Maximum Current
+3.3V
0A
0A
+3.3VAux
1 mA
30 mA
+12V
900 mA
2000 mA
Cable CREFCLK
Constant Frequency Clock (CFC) generated by the MXH912 card. Spread
Spectrum Clock (SSC) is optional.
Flash
for boot-up configuration data
SEEPROM
Card-specific information (serial number, etc.)
Host Clock
Host clock isolation sup porting Constant Frequency Clock (CFC) or
Spread Spectrum Clock (SSC) for EDGE reference clock.
Brackets
High profile mounted on the board and low profile available in the
shipping package
Compliance
•RoHS
•REACH
•FCC Class B
•CE (EN-55022 (2010), EN 55024 (2010), EN 61000-6-2 (2005).
Supporting Speed and Width
Edge
PCIe Gen1.0, Gen2.0, and Gen3.0
x1, x2, x4, x8 link widths
x8, x16 Slot-widths
PCI Express Gen 3.0
8.0 GT/s per lane signaling –64 GT/s total signaling.
Cable Connection
•One PCI Express Gen3.0 x8 iPass cable connection
•Support for iPass copper cables up to 5 meters.
Table 2:MXH912 Product High-Level Specifications

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3.3 Simplified schematics
The figure below shows the MXH912 simplified schematics with main functions.
Figure 1: MXH912 Simplified Schematics
3.4 PCIe Slot Determination
The MXH912 supports PCIe Gen1.0, Gen2.0, Gen3.0 speeds and x1, x2, x4 and x8 slot edge link-widths. The slot width
and speed will affect the performance of the card. The card can be installed in an x8 or x16 connector. The card will
auto-configure the slot speed and width.
•Install the board in a slot connecting directly to the CPU for optimal shared memory performance.
3.5 Airflow - Operating Environment
To maximize the product’s lifetime and maintain the warranty, specify the operating temperature, and ensure the
specified airflow is present. Consider Special care when using MXH912 in office-type cabinets with poor cooling in
combination with other high energy-consuming PCIe devices, e.g., not active cooled GPUs:
•Operating Temperature: 0°C - 55°C (32°F - 131°F),
•Airflow: 350 LFM
TIP: Please use the dis_diag tool immediately after software installation to verify the temperature. If the chip
temperature reported by dis_diag exceeds 95°C, it recommends improving the airflow.

Users Guide-MXH912 8
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4Installation
For installation, follow these steps from 4.1 to 4.7 sequentially.
4.1 Board Unpacking
The MXH912 includes the following components.
•MXH912 Adapter Board with high profile PCIe bracket mounted.
•Low profile PCIe bracket.
•Anti-static bag.
•Get started guide with serial number for quick Dolphins eXpressWare PCIe software download.
The MXH912 card is delivered in an anti-static bag to avoid any potential damage from static electricity. It is crucial to
exercise anti-static precautions before removing the card from the packaging. Clothing or the surrounding work
environment can generate static electricity, which may harm the PCI Express adapter card or the PC. Wearing a
grounded anti-static wrist strap when opening the PC and handling the MXH912 after taking it out
of the anti-static bag is recommended. Pre-Installation Questions
Before installing the MXH912, it is essential to identify the necessary configuration requirements
through specific steps.
•Which system and PCIe slot are suitable for installing the card?
•What is the speed and link width of the selected slot?
•What are the environmental conditions where the card will be installed?
•What type and length of cables will be used?
•How to ensure adequate operational conditions, including temperature and airflow
4.2 Change PCIe Bracket
The MXH912 package comes with both standard and low-profile PCI Express brackets. The board is initially
installed with a standard bracket. To switch to the low-profile bracket, carefully unscrew the two mounting
screws to remove the full-height bracket. Remember to save the screws and replace the bracket with the low-
profile one.
Before proceeding with the installation process, ensure you are correctly grounded to prevent static discharges
that can damage the adapter card. Use the two mounting screws to install the low-profile bracket and be cautious
not to overtighten them. Tighten the screws carefully while ensuring that they are appropriately secured.
Figure 2: Full length
PCIe bracket

Users Guide-MXH912 9
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4.3 Configure the Board
Set the DIP switch settings for proper operation depending on the firmware. Please refer to the section Configuration
and DIP Switch on page 11 for details.
4.4 Install the Adapter Card
Before installing the adapter card, ensure you are properly grounded to avoid static discharges that may
destroy your computer or the adapter card. Ensure you are grounded before opening your computer or
the anti-static bag containing the MXH912. Please follow your computers or expansion chassis manual on
installing a PCI Express card.
The MXH912 Adapter card can be installed into any PCI Express x8 and x16 slot. The MXH912 supports PCI Express Gen1.0,
Gen2.0, and Gen3.0 signaling.
NOTE: The MXH912 requires complete electrical x8 signaling from the slot to achieve maximum performance since it
is an x8 card.
4.5 Installing and Removing the Cable
Installing and removing cables should be done with the host and expansion system powered off. Please contact the
Dolphin representative if you intend to connect and disconnect the PCI Express cables continuously.
4.5.1 Connecting the Cable
Please carefully install the cable connector into the connector housing on the MXH912 adapter card. To install
the iPass cable, match the cable house with the connector on the MXH912 adapter card. Use even pressure to
insert the connector until it is secure. Adhere to ESD guidelines when installing the cables to ensure you don’t
damage the board.
4.5.2 Cable strain relief
It is crucial to provide strain relief for the PCIe cables to prevent fatigue loading and damage to the card. The
cables should be mechanically secured to the rack or cabinet, particularly for long and heavy cables and those
between cabinets and racks.
4.5.3 Disconnecting the Cable
Please carefully pull the release tab to release the cable from the locking latches and gently pull the cable out
of the connector guides.

Users Guide-MXH912 10
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4.6 Installing the Dolphin Board Management Software
The MXH912 adapter card is supported by Dolphins Board Manament Software –a part of s with Dolphin’s
eXpressWare software package for the MX product line. Please visit. Register and download the latest documentation
and software. Following the quick installation guide on the web page above, installing the software for your operating
system is recommended.
http://www.dolphinics.com/mx
TIP: Dolphin provides software and documentation for several product families; please remember to select the MX
product family before downloading. The MXH912 requires Dolphin software version DIS 5.22.0 or higher to operate.
The software download requires a password to log in. If you follow the instructions on the getting started document
bundled with the adapter card, the password will automatically be emailed to you. If you fail to provide the correct
software serial number on the getting started document, your request will be managed manually.
Note: Please consult the eXpressWare release note for detailed information on available software functionality.
Please get in touch with Dolphin for more information.
4.7 Verify Installation & LEDs
The MXH912 has two bi-color LEDs visible through the PCI Express bracket.
The LEDs are visible through cut-outs in the PCIe bracket on each side of the cable connector block.
Dark
Yellow
Green
Link
Power off, No Cable
installed
Power on, No Link
Power on, cable installed; Link
operational
NTB
Transparent Host
NA
NA
Table 3: LED behaviors

Users Guide-MXH912 11
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5Operation
5.1 Configuration and DIP Switch
The MXH912 has one bank of 4 DIP switches. The default factory setting for the MXH912 is an x8 Transparent link
connection suitable for a two-node configuration.
The MXH912 has DIP switches for setting unique modes or operations; the meaning of each DIP switch depends on the
loaded firmware. Please carefully read the documentation shipping with the card before modifying any DIP switch
settings. Please pay close attention to the ON and OFF positions on the DIP switch.
Figure 3: DIP Switch (Shipping Default)
Figure 3 displays the DIP switch utilized by the MXH912 adapter card for configuration purposes. It is required to keep all
unlisted DIP switches in their default positions. For a comprehensive overview of the DIP switch configurations for the
MXH912, please refer to Table 4: DIP Switch Settings, which outlines the different transparent settings available.
5.2 DIP switch Transparent Settings
These are configurations available for MXH912. Please consult the Firmware Release Note for details.
Table 4: DIP Switch Transparent settings for MXH912.
MXH912
DIP settings
Shipping default
1 x8 port
Set
Config#0

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5.3 Use Case -Transparent Host Mode
The Host computer is equipped with an MXH912 adapter and connected to an expansion system using an iPass cable.
The MXH912 adapter card operates in Transparent mode, and you should set the dip switches according to the
instructions provided in Table 7.
Figure 4:Transparent topology
5.4 Firmware Upgrade
Periodically, Dolphin might release upgraded firmware accessed through the web or incorporated into the Dolphin
software distribution at www.dolphinics.com/mx.
Please consult the MXH912 Firmware Release Note for information on firmware upgrades.
5.5 Identifying the Card
The card has a label sticker with the serial number in the format ‘MXH912-YY-ZZZZZZ’, where YY denotes the card revision
(e.g., BB) and ZZZZZZ denotes the serialised production number (e.g., 012345). This whole string makes up the card's
serial number (i.e., MXH912-BC-012345).
You can also get this information using lspci in Linux:
First, identify the devices for the Dolphin Host card. Then, run the lspci and identify the card.
#lspci | grep "Device 4028"
09:00.0 PCI bridge: PMC-Sierra Inc. Device 4028
09:00.1 Memory controller: PMC-Sierra Inc. Device 4028
0a:00.0 PCI bridge: PMC-Sierra Inc. Device 4028

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Then, run the lspci and identify the card. It will show up as something like
#lspci -s 09:00.0 -v
09:00.0 PCI bridge: PMC-Sierra Inc. Device 4028 (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 40
Bus: primary=09, secondary=0a, subordinate=0f, sec-latency=0
I/O behind bridge: 00001000-00002fff [size=8K]
Memory behind bridge: e8000000-ecffffff [size=80M]
Prefetchable memory behind bridge: 00000000c0000000-00000000cfffffff
[size=256M]
Capabilities: [40] Express Upstream Port, MSI 00
Capabilities: [7c] MSI: Enable+ Count=1/8 Maskable- 64bit+
Capabilities: [8c] Power Management version 3
Capabilities: [94] Subsystem: Dolphin Interconnect Solutions AS Device 0912
Capabilities: [100] Advanced Error Reporting
Capabilities: [148] Power Budgeting <?>
Capabilities: [158] Multicast
Capabilities: [188] Secondary PCI Express
Capabilities: [1b4] Device Serial Number 00-00-42-42-00-00-00-19
Capabilities: [1c0] Latency Tolerance Reporting
Capabilities: [1c8] Access Control Services
Capabilities: [1f0] Data Link Feature <?>
Capabilities: [1fc] Physical Layer 16.0 GT/s <?>
Capabilities: [23c] Lane Margining at the Receiver <?>
Capabilities: [7f8] Vendor Specific Information: ID=ffff Rev=1 Len=808 <?>
Kernel driver in use: dis-mx-p2p
#lspci -s 09:00.0 -v | grep -E "Subsystem|Serial"
Capabilities: [94] Subsystem: Dolphin Interconnect Solutions AS Device 0912
Capabilities: [1b4] Device Serial Number 00-00-42-42-00-00-00-19
This shows the card as revision 0x4243 (hexadecimal values of the ‘BC’ letters in the ASCII table), with the production
number 0x00000019 (0000025 in decimal)

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6PCIe Cable Port
6.1 PCIe Cable Signals
The external PCI Express cable connector supports the following signals:
Signal Type
Description
PETpN/PETnN
PCI Express Transmitter pairs labelled where N is the Lane number (starting with 0); “p” is the
actual signal, while “n” is the complement signal.
PERpN/PERnN
PCI Express Receiver pairs labelled where N is the Lane number (starting with 0); “p” is the
actual signal, while “n” is the complement signal.
CREFCLKp/
CREFCLKn
Low Voltage Differential 100 MHz Cable Reference Clock, “p” is the actual signal/Low Voltage
Differential 100 MHz Cable Reference Clock, “n” is the actual signal.
CPRSNT#
The cable present detects an active-low signal provided by a Downstream Subsystem to
indicate that it’s both present and its power is “good” (within tolerance)
CPOWERON
Cable Power On, an active-high signal provided by an Upstream Subsystem to notify slave-type
Downstream Subsystems to turn their main power on or off,
They are used, for example, to put a slave Subsystem into the S3 power management state.
CWAKE#
Cable Wake is an active-low signal that a Downstream Subsystem drives to re-activate the PCI
Express hierarchy’s main power rails and reference clocks.
Although optional for Upstream and Downstream Subsystems, all cable assemblies shall include
CWAKE#
CPERST#
Cable PERST#, an active-low signal, logically equivalent to system PERST# (platform reset),
driven by the Upstream subsystem.
CMISDA
The management interface data line is used for initial link setup and sideband messages when
used with CMI-compliant cables.
CMISCL
Management interface clock line. Used for both initial link setup and sideband messages when
used with CMI-compliant cables
PWR
+3.3 V Power (optional for connector): Power provisioning to the connector backshell allows
active signal conditioning components in the cable assembly. Within the cable, a wire should
not be provided.
PWR_RTN
Return for +3.3 V Power (optional for connector). Return path optional for +3.3 V power
provisioning.
SB_RTN
SideBand Return provides a return current path for all single-ended sideband signals, allowing
for power domain isolation between Subsystems.
GND
Ground Reference for PCI Express Transmitter, Receiver Lanes and Cable Reference Clock.
Table 5:PCIe Cable Port Signals

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6.2 PCIe Cable Connector x8 Pin-Out
A
B
A
B
1
GND
GND
18
CMISDA
PWR_RTN
2
PETp0
PERp0
19
SB_RTN
PWR_RTN
3
PETn0
PERn0
20
CPRSNT#
CWAKE#
4
GND
GND
21
CPWRON
CPERST#
5
PETp1
PERp1
22
GND
GND
6
PETn1
PERn1
23
PETp4
PERp4
7
GND
GND
24
PETn4
PERn4
8
PETp2
PERp2
25
GND
GND
9
PETn2
PERn2
26
PETp5
PERp5
10
GND
GND
27
PETn5
PERn5
11
PETp3
PERp3
28
GND
GND
12
PETn3
PERn3
29
PETp6
PERp6
13
GND
GND
30
PETn6
PERn6
14
CREFCLKp
PWR
31
GND
GND
15
CREFCLKn
PWR
32
PETp7
PERp7
16
GND
PWR
33
PETn7
PERn7
17
CMISCL
PWR_RTN
34
GND
GND
Table 6: External PCIe x8 cable pin-out
7Compliance and Regulatory Testing
7.1 EMC Compliance
The Dolphin PCI Express MXH912 adapter is tested to PASS the following relevant test standards
for PCI Express cards, telecommunication and industry equipment installed in a standard PC:
•EN 55032:2012,
•EN 55035:2017,
•EN 61000-3-2:2014,
•EN 61000-3-3:2013
•47 CFR Part 15, Subpart B (Clause 15.107 and 15.109) in conjunction with ANSI C63.4:2014
•CISPR 35:2016 Edition 1.0 (CISPR/I/412/CDV) Korean Harmonized standard, KN 35
This does not ensure that it will comply with these standards in any random PC. The integrator is responsible for
ensuring that their products comply with all regulations where their product will be used.
7.2 FCC Class A
After conducting tests, this device has been determined to conform to the Class A digital device regulations
specified in part 15 of the FCC Rules.

Users Guide-MXH912 16
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7.3 RoHS Compliance
The Dolphin MXH912 is RoHS compliant. A Compliance certificate issued by the manufacturer is
available upon request.
7.4 WEEE Notice
The adapter card bears the label following European Directive 2002/96/EC, which pertains
to waste electrical and electronic equipment (WEEE). This directive outlines the guidelines
for properly disposing and recycling used appliances within the European Union. The
presence of this label on the product signifies that it should not be discarded but returned to an approved
local WEEE waste collector.
8Limited Warranty
Dolphin Interconnect Solutions warrants this product to be free from manufacturing defects under the following
terms:
8.1 Warranty Period
Dolphin warrants the product for one (1) year from the date of purchase. Extended warranties are available.
8.2 Coverage
To the extent permitted by applicable law, this warranty does not apply to:
•Damages caused by operator error or non-compliance with instructions available for the product.
•Use or attempt to use or program firmware not approved by Dolphin.
•Damage which results from accident, abuse, misuse, neglected improper handling or improper installation;
moisture, corrosive environments, missing cable strain-relief, high voltage surges, shipping, or abnormal working
conditions.
•Damages result from violating the specified operating or storage temperatures and airflow.
•Damage is caused by acts of nature, e.g., floods, storms, fires, or earthquakes.
•Damage caused by any power source out of range or not provided with the product.
•Normal wear and tear.
•Attempts to repair, modify, open, or upgrade the product by personnel or agents not authorized by Dolphin.
•Products that have had the product serial number tampered with or removed.
•Damage to the product caused by products not supplied by Dolphin.
8.3 Service Procedure
Suppose the product proves defective during the Warranty Period. In that case, you should contact the seller that
supplied you with the product, or if you purchased it directly from Dolphin, please check
www.dolphinics.com/support to obtain a valid RMA number and instructions. Products returned to Dolphin without
a valid RMA number will not be serviced under this warranty.