Curtiss-Wright DuraCOR 311 User manual

USER MANUAL
DuraCOR 311
Intel® AtomTM E3845 Mission Computer

DuraCOR 311
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Disclaimer
Although the information contained herein has been carefully verified, Curtiss-Wright assumes no responsibility for errors that might
appear in this document or for damage to property or persons resulting from improper use of this manual or related software.
Curtiss-Wright reserves the right to change the contents and form of this document, as well as the features and specifications of its
products, at any time without notice. The information in this publication does not represent a commitment on the part of Curtiss-
Wright. This document contains proprietary information that is protected by copyright. All rights are reserved. No part of this
document may be photocopied, reproduced, or translated into another language without the prior written consent of Curtiss-Wright.
Contact Information
Curtiss-Wright
Defense Solutions Division
3222 S. Washington St.
Salt Lake City, Utah, USA 84115
T: +1.801.483.1533
Toll-Free: +1.800.483.3152
F: +1.801.483.1523
Email:
Sales: [e-mail]
Support: slp_tsuppor[email protected]m
Web-site: www.curtisswrightds.com
Send us your comments and feedback: [e-mail]
Trademarks
Parvus is a brand of Curtiss-Wright Corporation.
All trademarks, both marked and not marked, appearing in this document are the property of their respective owners.
Copyright
© 2020 Curtiss-Wright
WEEE
The information below is issued in compliance with the regulations as set out by the 2002/96/CE directive, subsequently superseded
by 2003/108/CE. It refers to electrical and electronic equipment and the waste management of such products. When disposing of a
device, including all of its components, subassemblies, and materials that are an integral part of the product, you should consider
the WEEE directive.
This symbol has been attached to the equipment or, if that was not possible, on the packaging,
instruction literature, and/or the guarantee sheet. Using this symbol states that the device has been
marketed after August 13th 2005, and implies that you must separate all of its components when
possible, and dispose of them in accordance with local waste disposal legislation.
Because of the substances present in the equipment, an improper use or disposal of the refuse can cause damage to human
health and to the environment.
With reference to WEEE, it is compulsory not to dispose of the equipment with normal urban refuse. Arrangements should be
instigated for separate collection and disposal.
Contact your local waste collection body for more detailed recycling information.
In case of illicit disposal, sanctions may be levied on transgressors.
RoHS
This device, including all its components, subassemblies, and the consumable materials that are an integral part of the product, has
been manufactured in compliance with the European directive 2002/95/EC known as the RoHS directive (Restrictions on the use of
certain Hazardous Substances). This directive targets the reduction of certain hazardous substances previously used in electrical
and electronic equipment (EEE).

DuraCOR 311
Table of Contents
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Table of Contents
Table of Contents......................................................................................................................3
List of Figures...........................................................................................................................6
List of Tables.............................................................................................................................7
Chapter 1 Introduction.............................................................................................................8
About This Document....................................................................................................................................8
Manual Organization ..............................................................................................................................8
Definitions...............................................................................................................................................8
Description of Safety Symbols................................................................................................................8
Functional Description...................................................................................................................................9
Features..................................................................................................................................................9
Configurations.......................................................................................................................................10
Base System..................................................................................................................................10
Base System with Removable Storage Bay Option.......................................................................11
System Block Diagram .........................................................................................................................12
Shared Resources and Connectors Location.......................................................................................13
Chapter 2 Operational Description .......................................................................................14
Mini-PCIe Expansion...................................................................................................................................14
Installing Mini-PCIe Cards into the DuraCOR 311 Mission Computer.................................................15
Integrating Mini-PCIe Cards .................................................................................................................15
Storage Options ..........................................................................................................................................16
mSATA .................................................................................................................................................16
2.5” SSD Expansion .............................................................................................................................16
Installing the Device.......................................................................................................................16
Removing the Device.....................................................................................................................16
Accessories....................................................................................................................................16
MicroSD Card Expansion .....................................................................................................................17
Installation......................................................................................................................................17
Removal.........................................................................................................................................18
Audio...........................................................................................................................................................18
Microphone...........................................................................................................................................18
Serial Configuration.....................................................................................................................................19
Console Redirect..................................................................................................................................19
GPIO ...........................................................................................................................................................19
Built-In Test (BIT)........................................................................................................................................19
Zeroization...................................................................................................................................................19
Remote Off..................................................................................................................................................19
Implementing Remote Off.....................................................................................................................19
Write Protect ...............................................................................................................................................20
Power Hold Up............................................................................................................................................20
Chapter 3 Quick Start Guide .................................................................................................21
Recommended Equipment..........................................................................................................................21
Breakout Cable Set ..............................................................................................................................21

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Power-on Sequence....................................................................................................................................21
Chapter 4 Connector Description.........................................................................................23
Connector Identification ..............................................................................................................................23
Connector Pinouts.......................................................................................................................................24
J1 Power Connector.............................................................................................................................24
J2 I/O Connector...................................................................................................................................25
J3 I/O Connector...................................................................................................................................27
J4 Configurable I/O Connector.............................................................................................................29
Configurable I/O Internal Connectors...................................................................................................31
Test Cable Set –CBL-C31X-01 ...........................................................................................................32
Chapter 5 Specifications .......................................................................................................33
Technical Specifications..............................................................................................................................33
Energy Efficient CPU/GPU...................................................................................................................33
Storage.................................................................................................................................................33
Modular/Expandable.............................................................................................................................33
Target Applications...............................................................................................................................33
Standard I/O Interfaces ........................................................................................................................34
Related Products..................................................................................................................................34
Mechanical Specifications...........................................................................................................................34
Physical ................................................................................................................................................34
Dimensions...........................................................................................................................................34
Mounting the System............................................................................................................................37
Power....................................................................................................................................................37
Environmental Specifications......................................................................................................................37
Temperature.........................................................................................................................................37
Shock/Vibration.....................................................................................................................................38
EMI/EMC ..............................................................................................................................................38
Operating Conditions............................................................................................................................38
Other Specifications....................................................................................................................................39
Reliability ..............................................................................................................................................39
Export Jurisdiction ................................................................................................................................39
CE Marking...........................................................................................................................................39
Chapter 6 Troubleshooting ...................................................................................................40
Product Identification...................................................................................................................................40
Technical Assistance ..................................................................................................................................40
Returning for Service ..................................................................................................................................40
Chapter 7 Contact Info...........................................................................................................41
Appendix A Onboard Microcontroller Functions.................................................................42
USB Serial Communication Protocol....................................................................................................42
Protocol Buffers....................................................................................................................................42
BIT Status via Protocol Buffers.............................................................................................................42
Serial Configuration via Protocol Buffers..............................................................................................43
Apendix B GPIO Configuration.............................................................................................44
GPIO ...........................................................................................................................................................44
GPIO Example Code............................................................................................................................45
Building Example Code ........................................................................................................................45

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Appendix C –BIOS Settings ..................................................................................................46
BIOS Operation...........................................................................................................................................46
Determining the BIOS Version .............................................................................................................46
BIOS Update.........................................................................................................................................46
Setup Guide..........................................................................................................................................47
Menu Bar........................................................................................................................................47
Legend Bar.....................................................................................................................................47
Selecting an Item ...........................................................................................................................47
Displaying Submenus ....................................................................................................................47
Item Specific Help Window ............................................................................................................47
General Help Window....................................................................................................................48
BIOS Setup...........................................................................................................................................48
Main......................................................................................................................................................48
System Information........................................................................................................................49
Boot Features.................................................................................................................................49
Platform Information.......................................................................................................................51
Advanced..............................................................................................................................................51
Miscellaneous ................................................................................................................................52
Watchdog.......................................................................................................................................52
H/W Monitor ...................................................................................................................................53
CPU Configuration .........................................................................................................................55
CPU Power Management ..............................................................................................................56
Uncore Configuration.....................................................................................................................57
IGD - LCD Control..........................................................................................................................58
South Cluster Configuration...........................................................................................................60
PCI Express Configuration.............................................................................................................60
USB Configuration .........................................................................................................................61
Audio Configuration........................................................................................................................62
SATA Drives...................................................................................................................................63
LPSS & SCC Configuration ...........................................................................................................64
Miscellaneous Configuration..........................................................................................................65
SMBIOS Event Log........................................................................................................................66
Memory ECC Error Logging...........................................................................................................67
Kontron Board................................................................................................................................68
Security.................................................................................................................................................69
Boot ......................................................................................................................................................69
Exit........................................................................................................................................................70
Glossary ..................................................................................................................................71

DuraCOR 311
List of Figures
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List of Figures
Figure 1: Base Unit .....................................................................................................................................11
Figure 2: Base System with Removable Storage Bay................................................................................11
Figure 3: DuraCOR 311 Block Diagram......................................................................................................12
Figure 4: SATA Expansion..........................................................................................................................13
Figure 5: Mini-PCIe Cards from various Manufactureres ...........................................................................14
Figure 6: Card Slot Identification.................................................................................................................15
Figure 7: SSD Removable Tray..................................................................................................................16
Figure 8: MicroSD Card Slot.......................................................................................................................17
Figure 9: MicroSD Card Removal...............................................................................................................17
Figure 10: DuraCOR 311 Connector Identification.....................................................................................23
Figure 11: DuraCOR 311 J1 Front Pinout...................................................................................................24
Figure 12: DuraCOR 311 J2 Front Pinout...................................................................................................25
Figure 13: DuraCOR 311 J3 Front Pinout...................................................................................................27
Figure 14: DuraCOR 311 J4 Front Pinout...................................................................................................29
Figure 15: P2 –Audio Connector................................................................................................................31
Figure 16: P4-P6 –Configurable I/O...........................................................................................................31
Figure 17: CBL-C31X-01 Starter Cable Set................................................................................................32
Figure 18: DuraCOR 311 Top View Dimensions ........................................................................................35
Figure 19: DuraCOR 311 Front View Dimensions......................................................................................35
Figure 20: DuraCOR 311 Side View Dimensions.......................................................................................36
Figure 21: DuraCOR 311 with Removable SATA SSD Option Front View ................................................36
Figure 22: DuraCOR 311 with Removable SATA SSD Option Side View..................................................36
Figure 23: DuraCOR 311 Mounting Hole Locations ...................................................................................37
Figure 24: GPIO Connection to CPU..........................................................................................................44

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List of Tables
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List of Tables
Table 1: DuraCOR 311 Configurations.......................................................................................................10
Table 2: DuraCOR 311 Peripheral Chip List...............................................................................................12
Table 3: Stereo Connector Pinout...............................................................................................................18
Table 4: DuraCOR 311 Connector IdentificationTable ...............................................................................23
Table 5: J1 Connector Information..............................................................................................................24
Table 6: J1 Pinout .......................................................................................................................................24
Table 7: J2 Connector Information..............................................................................................................25
Table 8: J2 Pinout .......................................................................................................................................25
Table 9: J3 Connector Information..............................................................................................................27
Table 10: J3 Pinout .....................................................................................................................................27
Table 11: J4 Connector Information...........................................................................................................29
Table 12: J4 Pinout .....................................................................................................................................29
Table 13: Configurable I/O Internal Connector Part Numbers....................................................................31
Table 14: CBL-C31X-01..............................................................................................................................32
Table 15: USB Serial Protocol ....................................................................................................................42

DuraCOR 311
Chapter 1 Introduction
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Chapter 1 Introduction
The DuraCOR 311 is an ultra-small form factor (SFF) tactical mission computer based on a low-power,
four-core Intel®AtomTM 3845 (Bay Trail-I) processor equipped with a rugged Flash disk and PCIe-Mini
Card I/O expansion slots. It contains a MIL-STD-1275/704 power supply in an IP67 (dust/water proof)
sealed aluminum chassis with micro-miniature MIL-DTL-38999 like connectors.
About This Document
This manual provides the technical information necessary to take advantage of all features and integrate
the mission computer in diverse platforms and applications.
Manual Organization
This manual provides functional and technical descriptions of the DuraCOR 311 hardware, instructions on
connecting the system to test equipment, connector descriptions and pinouts, and specifications.
Chapter 1 provides an introduction and function description of the DuraCOR 311
Chapter 2 explains how to operate the DuraCOR 311. It describes the system connectors and
cables, and includes procedures for starting the system, installing and using Mini-PCIe IO cards,
and using zeroization capabilities.
Chapter 3 provides a Quick Start guide
Chapter 4 contains connector pinouts for all connectors (external and internal).
Chapter 5 provides chassis specifications, dimensions, and mounting instructions. In addition, it
provides the technical and environmental specifications for the DuraCOR 311.
Chapter 6 provides troubleshooting instructions and technical support contact information
Chapter 7 provides additional contact information.
Definitions
Please refer to the Glossary at the end of this document for an explanation of terms.
Description of Safety Symbols
The following symbols are used in this manual to indicate important information and potentially dangerous
situations.
Warning! Danger, electrical shock hazard!
Personal injury or death could occur. Also damage to the system, connected peripheral devices, or
software could occur if the warnings are not followed carefully.
Caution! Hazard to individuals, environment, devices, or data!
If you do not adhere to the safety advice next to this symbol, there is obvious hazard to individuals, to
environment, to materials, or to data.

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Note: This symbol highlights important information or instructions that should be observed.
Functional Description
The Parvus®DuraCOR®311 is an ultra-small form factor (SFF) tactical mission computer based on a low-
power, four-core Intel®Atom™ 3845 (Bay Trail-I) processor equipped with a rugged Flash disk and PCIe-
Mini Card I/O expansion slots. At less than 40 cu. in. in volume, 1.5 lbs. in weight, and 15W power, this
miniature multi-core rugged Commercial Off-the-Shelf (COTS) processor is an ideal x86 computing
solution for size, weight, power and cost (SWaP-C) sensitive mobile, airborne, ground, manned and
unmanned vehicle and sensor applications. Optimized for high performance energy efficient processing,
the unit boasts a quad-core 64-bit Intel Architecture (IA) CPU with integrated Intel HD Graphics.
The ultra-reliable and modular design of the DuraCOR 311 features high mechanical robustness and I/O
flexibility to meet the needs of civil and military aerospace platforms. The unit features an industrial-grade
Intel-based Computer-on-Module (COM) tightly integrated with a Flash SSD and system carrier board,
which provides a full complement of standard vetronics I/O interfaces (including USB, Ethernet, Serial,
DIO, Video, Audio), as well as up to three slots for optional add-on Mini-PCIe I/O modules. In addition to
internal mSATA and microSD card slots, the system offers an optional removable 2.5” SATA SSD storage
option for high capacity storage and information assurance requirements. Like other DuraCOR models,
the 311 leverages both an ecosystem of rugged COTS Mini- PCIe modules (including MIL-STD-1553 and
ARINC429 avionics databus interfaces) and Curtiss-Wright’s responsive, cost-competitive application
engineering services to deliver Modified COTS (MCOTS) variants quickly and without a traditional NRE
fee.
The unique combination of small size, low-power multi-core processing, and flexible I/O of the DuraCOR
311 delivers new capabilities for Command, Control, Communications, Computers, Intelligence,
Surveillance and Reconnaissance (C4ISR) applications. This compact system supports a wide operating
temperature range of -40 to +71°C (-40 to +160ºF) without fans or active cooling requirements. It thrives
in extreme shock and vibration conditions, high altitude, and humidity, making it well suited for mobile,
tactical, aerospace, and ground vehicle applications. Reliably designed for use onboard aircraft and
vehicle platforms, the DuraCOR 311 has successfully passed comprehensive qualification testing to MIL-
STD-810G, MIL-STD-461F, MIL-STD-1275D, MIL-STD-704F and RTCA/DO-160G test conditions for
environmental, power and EMI (thermal, shock, vibration, dust, water, humidity, altitude, power
spikes/surges, conducted/radiated emissions and susceptibility).
Housed in a rugged sealed IP67-rated (dust and water proof) aluminum chassis with MIL-performance
circular connectors, the DuraCOR 311 features advanced EMI filtering and power conditioning to protect
against input vehicle/aircraft voltage surges, spikes and transients. In addition, optional 50ms power hold-
up capabilities are supported for MIL-STD-704F aircraft power switch-over requirements.
Features
Miniature SWaP-optimized quad-core Intel®Atom™processor system:
Size: ~40 in³ volume
Weight: < 1.5 lbs. (< 0.68 kgs)
Power: < 15W typical
Rugged IP67 chassis with micro-mini MIL-performance circular connectors
Modular I/O architecture: up to three slots for PCIe Mini-Cards (for add-on I/O)

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Rugged Flash storage (mSATA / microSD card / removable 2.5” SATA SSD)
28 VDC MIL-1275/704/DO-160 power supply for aircraft and ground vehicles; optional 50 ms
power hold-up
Qualified to extreme MIL-STD-810G/DO-160 thermal, shock, vibration, altitude, humidity; also
MIL-STD-461F/DO-160G EMI/EMC
Designed and manufactured using AS9100 Aerospace Grade/ISO 90001:2000 certified Quality
Program.
CE Marking
Configurations
Due to the modularity of the DuraCOR 311 (mSATA / microSD/Removable SSD, pre-integrated Mini-PCIe
cards, and operation system options), numerous configuration variants are possible. Please consult with
your sales representative and application engineer to assess your technical requirements and
recommended system configuration.
Table 1: DuraCOR 311 Configurations
Product Number
Description
System w/ mSATA
C311-01
DuraCOR 311, Intel 3845, 4 GB RAM, 16 GB mSATA SSD mSATA, Linux
C311-02
DuraCOR 311, Intel 3845, 4 GB RAM, 32 GB mSATA SSD mSATA, Linux
C311-03
DuraCOR 311, Intel 3845, 4 GB RAM, 64 GB mSATA SSD mSATA, Linux
C311-04
DuraCOR 311, Intel 3845, 4 GB RAM, 128 GB mSATA SSD mSATA, Linux
C311-05
DuraCOR 311, Intel 3845, 4 GB RAM, 256 GB mSATA SSD mSATA, Linux
C311-52
DuraCOR 311, Intel 3845, 4 GB RAM, 32 GB mSATA SSD mSATA, Windows
C311-53
DuraCOR 311, Intel 3845, 4 GB RAM, 64 GB mSATA SSD mSATA, Windows
C311-54
DuraCOR 311, Intel 3845, 4 GB RAM, 128 GB mSATA SSD mSATA, Windows
C311-55
DuraCOR 311, Intel 3845, 4 GB RAM, 256 GB mSATA SSD mSATA, Windows
SYSTEM with 2.5" REMOVABLE STORAGE BAY (Disk sold separately)
C311-00R
DuraCOR 311, Intel 3845, 4 GB RAM, no mSATA, Removable 2.5" SATA SSD
Storage Bay (disk sold separately)
Base System
The base system contains a Smart Mobility ARChitecture (SMARC) form factor System on Module (SOM)
and a pre-installed storage device loaded with either Linux or Windows 10.
Example ordering code
C311-01: DuraCOR 311, Intel 3845, 4 GB RAM, 16 GB mSATA SSD, Linux

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Figure 1: Base Unit
Base System with Removable Storage Bay Option
Example ordering code
C311-00R: DuraCOR 311, Intel 3845, 4 GB RAM, no mSATA, Removable 2.5” SATA SSD
Storage Bay
SSD31X-064S-L: 64 GB 2.5" SATA SSD, Industrial SLC NAND Flash -40/+85C, Mounting Tray,
Linux (compatible with DuraCOR 31X)
Figure 2: Base System with Removable Storage Bay

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System Block Diagram
The block diagram shows the DuraCOR 311 interfaces.
Figure 3: DuraCOR 311 Block Diagram
Table 2: DuraCOR 311 Peripheral Chip List
Interface
Description
MFG
MFG Part Number
Processor
Intel®AtomTM E3845 –On SMARC
Intel
Ethernet
I210 - On SMARC
Intel
I210 - On Motherboard
Intel
WGI210IT
Serial
Dual TXRX RS232/422/485 Multiprotocol
Transceiver
Linear Technologies
LTC2872
PCIe
PCIe Switch
Broadcom/Avago
PEX8605
PCIe Gen 3 Mux/Dmux
NXP Semiconductors
CBTL02043A
USB
7-port USB 2.0 HUB
Microchip Technology
USB2517
Audio
Audio CODEC
Cirrus Logic Inc.
CS4207
Microcontroller
ARM Microcontroller
Freescale
MK60DN512

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Shared Resources and Connectors Location
To accommodate different configurations, the following shared resources are explained below:
Mini-PCIe / mSATA Socket: This socket can be used either for an mSATA SSD or for a mini-PCIe card.
SATA / mSATA: P6 on the motherboard allows an add-on SATA drive to be attached to the system via
an add-on ring if larger capacities or removable storage is desired. If an added SATA devices is attached
the mini-PCIe / mSATA socket can no longer be used for storage, but will retain the mini-PCIe
functionality.
Figure 4: SATA Expansion
P6

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Chapter 2 Operational Description
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Chapter 2 Operational Description
Mini-PCIe Expansion
The DuraCOR 311 Mission Computer provides a powerful and flexible platform to integrate a variety of
devices based on Mini-PCIe.
Without increasing the height of the base unit the DuraCOR 311 can support up to three (3) Mini-PCIe
cards.
Typical devices offered in the Mini-PCIe form factor that can be easily integrated into a DuraCOR 311
include:
Gigabit Ethernet
MIL STD 1553
ARINC 429
CAN Bus
Frame Grabbers
GPS
Wi-Fi
Serial ports
Analog/digital data acquisition cards
GPIO
SATA
Figure 5: Mini-PCIe Cards from various Manufactureres

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Installing Mini-PCIe Cards into the DuraCOR 311 Mission
Computer
Caution! ESD Sensitive Components
Follow standard ESD and FOD controls to avoid damage to the internal components.
1. Remove the 15x 2-56 bolts using a #1 Philips screwdriver and remove base.
2. Insert a mini-PCIe card into slot 1 or 2. Use 2x 2mm screw with thread-locker, such as Loctite
222, to secure card to motherboard.
a. Mini-PCIe card slot 3 is reserved for installation at the factory.
3. Connect the corresponding cable from the mini-PCIe card to the expansion pins of the DuraCOR
311 I/O Board as required
a. A custom cable is required. See Integrating mini-PCIe Cards and Chapter 4 for available
I/O pins.
4. Close the unit and tighten screws to 34.4 in. oz. [0.24 Nm]. Use a thread-locker, such as Loctite
222.
Integrating Mini-PCIe Cards
To create a cable to bring out the I/O from the mini-PCIe cards through the circular connectors (J2-J4)
use the information in Chapter 4 for the available I/O. See Chapter 4, section Configurable I/O Internal
Connectors for manufacturer part number, mating connector, locations and pinouts. The configurable IO
lines do not contain any ESD protection.
Figure 6: Card Slot Identification
Mini-PCIe
mSATA /
Mini-PCIe
SMARC
Mini-PCIe

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Storage Options
The DuraCOR 311 has a number of options for data storage. The system has ability to use either an
mSATA or a 2.5” removable SSD. The DuraCOR 311 also has a microSD card slot. Support for an
mSATA SSD and a microSD card within the base unit, and a 2.5” SSD on an expansion segment provide
flexibility and many possible storage configurations.
mSATA
The default storage for the DuraCOR 311 base system is an mSATA card. Typically, this will be installed
at the factory. All drives loaded are rated to the same or greater environmental specifications as the
system. See Figure 5.
2.5” SSD Expansion
With the addition of a separate ring or housing, the DuraCOR 311 has the ability to incorporate a 2.5”
SSD. The capacities will be limited to what is available in the industrial market. The removable SATA
drive is hot swappable, therefore, there is no need to turn system off prior to installing or removing the
drive. Hot swappable activation or deactivation can be selected in BIOS, see BIOS Settings in Appendix
C.
Installing the Device
Below are the basic steps to install a 2.5” SATA drive in the system.
Ensure the SATA drive is securely attach to the SSD tray using 4x M3 flat head screws and a
thread locker (i.e. Loctite 222).
Remove the door and place the drive and tray assembly on the door.
Slide the assembly into the system with the words and symbols toward the top of the unit. The
removable storage device can only be inserted in to the system in one direction.
Tighten the thumb screws. Ensure both thumb screws are tight; otherwise the system may not be
watertight.
Removing the Device
Loosen the thumb screws completely.
Pull on the door to disconnect and remove the drive.
Remove the drive tray from the door. Replace the door on the system to maintain environmental
seal.
If desired, remove the drive from the tray. Take care not to lose the screws.
Accessories
Drive tray
4x M3x0.5x4mm flat head screw
Figure 7: SSD Removable Tray

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MicroSD Card Expansion
The DuraCOR 311 also has the ability to use a microSD card for storage. A microSD card may be used
in conjunction with another storage device. All drives loaded are rated to the same or greater
environmental specifications as the system.
Figure 8: MicroSD Card Slot
Caution! ESD Sensitive Components
Follow standard ESD and FOD controls to avoid damage to the internal components.
Installation
Power off system and remove the bottom cover
Slide the microSD socket cover toward the board edge
Figure 9: MicroSD Card Removal
Lift socket cover
Place the microSD card into the socket
SD
CARD

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Lower the cage and slide it away from the board edge to lock it in place. There will be an audible
click when cage is secured.
Replace the bottom cover and secure the screws to 34.4 in-oz. [0.24 Nm], using thread-locker
(i.e. Loctite 222).
Removal
Power off system and remove the bottom cover
Slide the microSD cage cover toward the board edge (Figure 9)
Lift cage
Remove the microSD card
Lower the cage and slide it away from the board edge to lock it in place. There will be an audible
click when cage is secured.
Replace the bottom cover and secure the screws to 34.4 in-oz. [0.24 Nm], using thread-locker
(i.e. Loctite 222)
Audio
The DuraCOR 311 supports stereo audio. Audio can be used without any modification through the HDMI
port. If audio, this includes microphone, line in, line out, and headphone, is required these signals can be
accessed using the configurable I/O pins. A cable with the P2 connector pinout below will allow the
system to breakout these signals. The second termination on the cable can be any combination of the
configurable I/O which best suits the implementation needs. See Chapter 4, section Configurable I/O
Internal Connectors for manufacturer part number, mating connector, locations and pinouts.
Caution! ESD Sensitive Components
Follow standard ESD and FOD controls to avoid damage to the internal components.
Microphone
Microphone is mono only.
Table 3: Stereo Connector Pinout
P2
Signals
11
Microphone
12
Line In Left
13
Audio GND
14
Line In Right
15
Headphone GND
16
Audio GND
17
Headphone Out Left
18
Line Out Left
19
Headphone Out Right
20
Line Out Right

DuraCOR 311
Chapter 2 Operational Description
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Effective: 17 Mar 20
Page 19 of 72
Serial Configuration
The DuraCOR C311 has two integrated serial ports that are capable of RS232, RS422, and RS485. By
default, both of the serial ports are configured as RS232. The onboard microcontroller manages the mode
of the serial interfaces, and can be configured via USB. See Appendix A for more information on
configuring the serial interfaces via the onboard microcontroller.
Console Redirect
A third RS232 port can be obtained by disabling console redirection. The DuraCOR 311 is not capable of
console redirection. The SMARC module utilizes the internal SMARC COM1 port for console redirect.
This port is not brought to the circular connectors.
GPIO
The DuraCOR C311 has support for 6x GPIO lines on the J3 connector (See Chapter 4, J3 for pins). The
signals may be configured as any combination of input or output lines. Each output drives to a 3.3V level,
inputs are 5V tolerant. See Appendix B for configuring the GPIO signals.
Built-In Test (BIT)
The onboard microcontroller monitors many status lines and voltages on the system for the purposes of
BIT. The microcontroller runs these tests continuously, and logs their results to non-volatile memory.
See Appendix A for more information on accessing BIT information.
Zeroization
For data security, the DuraCOR 311 provides a zeroization connection to the Atom processor and the BIT
microcontroller. The user has the ability to implement the appropriate software for the system application.
The zeroization input can be accessed from J2_28 and J2_36, see Chapter 4.
Remote Off
Remote Off may be used to hold the DuraCOR 311 in a powered off state until the user desires the unit to
be powered. When Remote Off is enabled, no power is delivered to the system. Remote Off must be
disabled in order for the system to draw power.
Warning! The remote off signal will immediately power down the processor when it is asserted. Make
sure your system software is capable of handling hard power faults.
Implementing Remote Off
To enable Remote Off using the Test Cable Set (CBL-C31X-01), connect the labeled red hermaphroditic
Power Pole connectors together. Disable Remote Off by separating the connectors.

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Chapter 2 Operational Description
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To implement Remote Off using a custom cable connect J2_2 (Remote Off) to J2_13
(Remote_Off_Return) through a mechanical switch, relay or transistor switch powered by the 28V supply.
Refer to Chapter 4 for more connector information.
Write Protect
For configuration control, the DuraCOR 311 provides a write protect connection to the mSATA, BIT
microcontroller, and the PCIe Ethernet MAC/PHY. Asserting this signal causes the mSATA and PCIe
MAC/PHY devices to be unwritable. The write protect connection to the BIT microcontroller is for
monitoring purposes. The write protect input is accessed from J2_30 and J2_37, see Chapter 4.
Power Hold Up
The DuraCOR 311 has the option of 50 ms hold up at 40W. Hold up may be incorporated into the system
without any size increase to the system. Hold up is not a standard feature; please contact your sales
representative for system part numbers containing hold up.