VersaLogic VL-EPU-3312, VL-EPU-3311 Hardware Reference Manual

Hardware
Reference

Manual

DOC. REV. 1.2 Jan 2017

Raven

(VL-EPU-3312)

Intel® Atom™ E38xx-based
Embedded Processing Unit with
SATA, Dual Ethernet, USB,
Digital I/O, Serial, Video, Mini
PCIe Sockets, SPX, Trusted
Platform Module, and microSD.

VL-EPU-3312 Reference Manual i

WWW.VERSALOGIC.COM

12100 SW Tualatin Road
Tualatin, OR 97062-7341

[phone]

Fax [phone]

Copyright © 2016-2017 VersaLogic Corp. All rights reserved.

Notice:

Although every effort has been made to ensure this document is error-free, VersaLogic makes no
representations or warranties with respect to this product and specifically disclaims any implied warranties
of merchantability or fitness for any particular purpose.

VersaLogic reserves the right to revise this product and associated documentation at any time without
obligation to notify anyone of such changes.

* Other names and brands may be claimed as the property of others.

VL-EPU-3312 Reference Manual ii

Product Revision Notes

Revision 1.2

 Updated Integrator’s note on page 32

Revision 1.1

 Updated board images
 Revised audio content
 Updated Mini DisplayPort cable information

Revision 1.00

 First release

Support Page

The Raven Support Page contains additional information and resources for this product
including:

 Operating system information and software drivers
 Data sheets and manufacturers links for chips used in this product
 BIOS information and upgrades

VersaTech KnowledgeBase

The VersaTech KnowledgeBase contains useful technical information about VersaLogic
products, along with product advisories.

Customer Support

If you are unable to solve a problem after reading this manual, visiting the product support page,
or searching the KnowledgeBase, contact VersaLogic Technical Support at [phone].
VersaLogic support engineers are also available via e-mail at [e-mail].

Repair Service

If your product requires service, you must obtain a Returned Material Authorization (RMA)
number by calling 503-747-2261. Be ready to provide the following information:

 Your name, the name of your company, your phone number, and e-mail address
 The name of a technician or engineer that can be contacted if any questions arise
 The quantity of items being returned
 The model and serial number (barcode) of each item
 A detailed description of the problem
 Steps you have taken to resolve or recreate the problem
 The return shipping address

Warranty Repair All parts and labor charges are covered, including return shipping

Non-warranty Repair All approved non-warranty repairs are subject to diagnosis and labor

charges for UPS Ground delivery to United States addresses.

charges, parts charges and return shipping fees. Specify the shipping
method you prefer and provide a purchase order number for invoicing
the repair.

VL-EPU-3312 Reference Manual iii



Note:

Mark the RMA number clearly on the outside of the box before returning.

CAUTION:

Electrostatic discharge (ESD) can damage circuit boards, disk drives, and other
components.The circuit board must only be handled at an ESD workstation. If an
approved station is not available, some measure of protection can be provided by
wearing a grounded antistatic wrist strap. Keep all plastic away from the board, and do
not slide the board over any surface.

After removing the board from its protective wrapper, place the board on a grounded,
static-free surface, component side up. Use an antistatic foam pad if available.

The board should also be protected inside a closed metallic antistatic envelope during
shipment or storage.



Note:

The exterior coating on some metallic antistatic bags is sufficiently conductive to cause
excessive battery drain if the bag comes in contact with the bottom side of the Raven.

CAUTION:

Avoid touching the exposed circuitry with your fingers when handling the board. Though
it will not damage the circuitry, it is possible that small amounts of oil or perspiration on
the skin could have enough conductivity to cause the contents of CMOS RAM to
become corrupted through careless handling, resulting in CMOS resetting to factory
defaults.

CAUTION:

All mounting standoffs should be connected to earth ground (chassis ground). This
provides proper grounding for EMI purposes.

Cautions

Electrostatic Discharge

Handling Care

Earth Ground Requirement

VL-EPU-3312 Reference Manual iv

Contents

Cautions ............................................................................................................................. iv

Electrostatic Discharge ......................................................................................... iv

Handling Care ....................................................................................................... iv

Earth Ground Requirement ................................................................................... iv

Introduction ................................................................................................................... 9

Features ............................................................................................................................. 10

Technical Specifications ................................................................................................... 10

Block Diagram .................................................................................................................. 11

Dimensions and Mounting ................................................................................................ 12

Raven Dimensions ............................................................................................... 12

Mounting Plate Dimensions ................................................................................ 13

Configuration and Setup ............................................................................................. 14

Initial Configuration ......................................................................................................... 14

Basic Setup ....................................................................................................................... 14

BIOS Setup Utility ............................................................................................................ 16

Default BIOS Setup Values ................................................................................. 16

Operating System Installation ........................................................................................... 16

Jumper Blocks .................................................................................................................. 17

Jumper As-Shipped Configuration ...................................................................... 17

Jumper Configuration Summary .......................................................................... 17

Board Features ............................................................................................................ 18

CPU ................................................................................................................................... 18

CPU Die Temperature ......................................................................................... 18

System RAM ..................................................................................................................... 18

Flash Storage .................................................................................................................... 18

I/O Interfaces .................................................................................................................... 19

Real-Time Clock (RTC) ................................................................................................... 19

Watchdog Timer ............................................................................................................... 19

External Connectors ......................................................................................................... 20

Baseboard Connector Locations .......................................................................... 20

Power Delivery ................................................................................................................. 21

Main Power Connector ........................................................................................ 21

Cabling ................................................................................................................. 22

Power Requirements ............................................................................................ 22

Power Delivery Considerations ........................................................................... 22

Power Button ....................................................................................................... 23

Supported Power States ....................................................................................... 23

Battery Power Options ......................................................................................... 24

External Speaker ............................................................................................................... 25

Push-button Reset ............................................................................................................. 25

CPU Fan Connector .......................................................................................................... 26

Cabling ................................................................................................................. 26

LEDs ................................................................................................................................. 27

VL-EPU-3312 Reference Manual v

Power-Good/Fault Indicator LEDs ...................................................................... 28

Mass Storage Interfaces ............................................................................................. 29

SATA Interface ................................................................................................................. 29

microSD Socket ................................................................................................................ 30

eMMC Flash ..................................................................................................................... 30

Multi-purpose I/O ......................................................................................................... 31

USB Interfaces .................................................................................................................. 31

Mini PCIe Sockets ............................................................................................................ 32

W_DISABLE# Signal .......................................................................................... 34

Mini PCIe Card Wireless Status LEDs ................................................................ 35

mSATA Activity LED ......................................................................................... 36

User I/O Connector ........................................................................................................... 37

Cabling ................................................................................................................. 38

Analog-to-Digital Converter Interface .............................................................................. 39

Cabling ................................................................................................................. 40

SPX* Expansion Bus ........................................................................................................ 41

Cabling ................................................................................................................. 42

Serial I/O ...................................................................................................................... 43

Serial Ports ........................................................................................................................ 43

Serial Port Connector Pinout ............................................................................... 44

Cabling ................................................................................................................. 44

COM Port Configuration ..................................................................................... 45

Console Redirection ......................................................................................................... 45

Video Interfaces ........................................................................................................... 46

Mini DisplayPort++ Connector ........................................................................................ 46

VGA Output......................................................................................................... 48

Mini DisplayPort Cable Options ......................................................................... 48

LVDS Interface ................................................................................................................. 49

LVDS Flat Panel Display Connector ................................................................... 49

LVDS Backlight Connector ................................................................................. 51

Network Interfaces ...................................................................................................... 52

Ethernet Connector .............................................................................................. 52

Cabling ................................................................................................................. 53

Ethernet Status LEDs ........................................................................................... 54

VL-CBR-4005B Paddleboard ....................................................................................... 55

VL-CBR-4005B Connectors and Indicators ........................................................ 55

User I/O Connector .............................................................................................. 56

Cabling ................................................................................................................. 57

On-board Battery ................................................................................................. 57

Auxiliary I/O Connector ...................................................................................... 58

Dimensions and Mounting Holes ........................................................................ 59

VL-CBR-2004B Paddleboard ....................................................................................... 60

Analog Input Connections ................................................................................................ 60

Main I/O Connector .......................................................................................................... 61

Cabling ................................................................................................................. 61

VL-EPU-3312 Reference Manual vi

Dimensions and Mounting Holes ..................................................................................... 62

Thermal Considerations ............................................................................................. 63

Selecting the Correct Thermal Solution for Your Application ........................................ 63

Heat Plate ............................................................................................................. 63

System-level Considerations ............................................................................... 63

CPU Thermal Trip Points .................................................................................... 64

Thermal Specifications, Restrictions, and Conditions ........................................ 66

Overall Restrictions and Conditions: ................................................................... 66

Heat Plate Only Restrictions and Conditions: ..................................................... 66

Heat Sink Only Considerations: .......................................................................... 66

Heat Sink with Fan Considerations: .................................................................... 66

EPU-3312 Thermal Characterization ............................................................................... 67

Test Results.......................................................................................................... 68

Installing VersaLogic Thermal Solutions ......................................................................... 72

Hardware Assembly ............................................................................................. 72

Installing the VL-HDW-406 Passive Heat Sink .................................................. 73

Installing the VL-HDW-415 Heat Sink Fan ........................................................ 75

Installing the VL-HDW-408 Heat Pipe Block ..................................................... 76

KNOWN ISSUES .......................................................................................................... 77

Figures

Figure 1. The Raven (VL-EPU-3312) ............................................................................................................ 9

Figure 2. Raven (VL-EPU-3312) Block Diagram ......................................................................................... 11

Figure 3. Raven Dimensions and Mounting Holes ........................................................................................ 12

Figure 4. Mounting Plate Dimensions ........................................................................................................... 13

igure 5. Typical Development Configuration ................................................................................................ 15

Figure 6. Jumpers As-Shipped Configuration................................................................................................ 17

Figure 7. Baseboard Connector Locations..................................................................................................... 20

Figure 8. Main Power Connector Pin Orientation ......................................................................................... 21

Figure 9. Location and Pin Orientation of the Battery Connector ................................................................. 24

Figure 10. VL-CBR-0203 Latching Battery Module ..................................................................................... 25

Figure 11. Location and Pin Orientation of the CPU Fan Connector ............................................................ 26

Figure 12. Location of Status Indicator LEDs ............................................................................................... 27

Figure 13. Location of the Power-good/Fault Indicator LED ........................................................................ 28

Figure 14. Location of the SATA Connector ................................................................................................ 29

Figure 15. Location of the microSD Socket .................................................................................................. 30

Figure 16. Location of the USB Ports ........................................................................................................... 31

Figure 17. Location of Mini PCIe Sockets .................................................................................................... 32

Figure 18. Mini PCIe Wireless Status LEDs ................................................................................................. 35

Figure 19. Location of the SATA/mSATA Activity LED ............................................................................. 36

Figure 20. Location and Pin Orientation of the User I/O Connector ............................................................. 37

Figure 21. Location and Pin Orientation of the Analog-to-Digital Input Connector ..................................... 39

Figure 22. SPX Connector Location and Pin Configuration ......................................................................... 41

Figure 23. Location and Pin Orientation of the Serial I/O Connectors .......................................................... 43

Figure 24. Location of the Mini DisplayPort++ Connector ........................................................................... 47

Figure 25. VL-CBR-2032 Mini DisplayPort to VGA Adapter ...................................................................... 48

Figure 26. Location of the LVDS Connectors ............................................................................................... 49

Figure 27. Location and Pin Orientation of the Ethernet Connector ............................................................. 52

VL-EPU-3312 Reference Manual vii

Figure 28. Onboard Ethernet Status LEDs .................................................................................................... 54

Figure 29. VL-CBR-4005B Connectors, Switches, and LEDs ...................................................................... 55

Figure 30. Location and Pin Orientation of the User I/O Connector ............................................................. 56

Figure 31. Location and Pin Orientation of Auxiliary I/O Connector ........................................................... 58

Figure 32. VL-CBR-4005B Dimensions and Mounting Holes ...................................................................... 59

Figure 33. CBR-2004B Connectors............................................................................................................... 60

Figure 34. Analog Input and Ground Terminal Block Pinouts ...................................................................... 60

Figure 35. Location and Pin Orientation of the Main I/O Connector ............................................................ 61

Figure 36. CBR-2004B Dimensions and Mounting Holes ............................................................................ 62

Figure 37. EPU-3312-EAP Single Core Temperature Relative to Ambient Temperature ............................. 68

Figure 38. EPU-3312-EBP Dual Core Temperature Relative to Ambient Temperature ............................... 69

Figure 39. EPU-3312-EDP Quad Core Temperature Relative to Ambient Temperature .............................. 70

Figure 40. EPU-3312-EDP Quad Core with Heat Pipe - Temperature Relative to Ambient......................... 71

Figure 41. Hardware Assembly with Heat Plate Down ................................................................................. 72

Figure 42. Hardware Assembly with Heat Plate Up ................................................................ ...................... 73

Figure 43. Installing the Passive Heat Sink ................................ ................................................................ ... 74

Figure 44. Installing the Heat Sink Fan ......................................................................................................... 75

Figure 45. Installing the Heat Pipe Block ...................................................................................................... 76

Tables

Table 1: Jumper Block Configurations .......................................................................................................... 17

Table 2: Raven Memory Characteristics ....................................................................................................... 18

Table 3: Links to Sections Describing Connectors ........................................................................................ 20

Table 4: Main Power Connector Pinout ........................................................................................................ 22

Table 5: Supported Power States ................................................................................................................... 23

Table 6: CPU Fan Connector Pinout ............................................................................................................. 26

Table 7: Mini PCIe / mSATA Socket Pinout ................................................................................................ 33

Table 8: Mini PCIe Card Wireless Status LEDs ........................................................................................... 35

Table 9: User I/O Connector Pinout and Pin Orientation .............................................................................. 38

Table 10: Analog-to-Digital Input Connector Pinout .................................................................................... 40

Table 11: SPX Connector Pinout .................................................................................................................. 42

Table 12: COM1/COM2 Connector Pinout ................................................................................................... 44

Table 13: COM3/COM4 Connector Pinout ................................................................................................... 44

Table 14: Mini DisplayPort++ Connector Pinout .......................................................................................... 47

Table 15: LVDS Flat Panel Display Connector Pinout ................................................................................. 50

Table 16: LVDS Backlight Connector Pinout ............................................................................................... 51

Table 17: Ethernet Connector Pinout ............................................................................................................ 53

Table 18: User I/O Connector Pinout ............................................................................................................ 56

Table 19: Auxiliary I/O Connector Pinout .................................................................................................... 58

Table 20: Main I/O Connector Pinout ........................................................................................................... 61

Table 21: CPU Thermal Trip Points .............................................................................................................. 64

Table 22: Temperature Monitoring Programs ............................................................................................... 65

Table 23: Absolute Minimum and Maximum Air Temperatures ................................................................... 66

Table 24: EPU-3312 Thermal Testing Setup ................................................................................................ 67

Table 25: Heat Pipe Additional Configuration Details .................................................................................. 71

VL-EPU-3312 Reference Manual viii

Introduction

1

Introduction

Figure 1. The Raven (VL-EPU-3312)

VL-EPU-3312 Reference Manual 9

Features

 Intel Atom E3845 (1.91 GHz, Quad

Core), E3827 (1.75 GHz, Dual
Core), or E3815 (1.46 GHz, Single
Core) processor

 4 GB or 2GB soldered-on

DDR3L-1333 RAM

 Two auto-detect 10BaseT/

100BaseTX/1000BaseT Ethernet
ports with network boot support
(Port 1 only)

 Integrated Intel Gen 7 graphics core
 Four USB 2.0 host ports, one

USB 3.0/2.0 port, one port available
through Mini PCIe Socket #1

 Four RS-232/422/485 COM ports
 One Mini DisplayPort++ interface
 One LVDS interface
 Wide input voltage range (8 – 30V)
 Input under-voltage and over-voltage

protection

 Eight multi-range analog inputs
 I2C support
 Two Mini PCIe sockets
 Full ACPI support
 One SATA port, 3.0 Gbits/s
 One microSD socket
 Watchdog Timer, prescaler of

approximately 1 μs to 10 minutes.

 Standard heat plate with optional

thermal solutions

 Optional mounting plate
 Field upgradeable AMI UEFI BIOS

with enhancements

 RoHS compliant
 Extended temperature operation
 Customization available
 Trusted Platform Module

The Raven (VL-EPU-3312) is a feature-packed Embedded Processing Unit (EPU) engineered
and tested to meet the embedded industry’s evolving requirements to develop smaller, lighter,
and lower power embedded systems while adhering to stringent regulatory standards.

This embedded computer, equipped with an Intel* Atom* 38xx processor, is designed to withstand
extreme temperature, impact, and vibration. Its features include:

Introduction

Technical Specifications

VL-EPU-3312 Reference Manual 10

The Raven is compatible with popular operating systems including Microsoft*
Windows* 7/WES7, and Linux (see the VersaLogic OS Compatibility Chart).

Raven EPUs receive 100% functional testing and are backed by a limited five-year warranty.
Careful parts sourcing and US-based technical support ensure the highest possible quality,
reliability, service, and product longevity for this exceptional EPU.

Refer to the Raven Data Sheet for complete specifications. Specifications are subject to change
without notification.

Block Diagram

Introduction

Figure 2. Raven (VL-EPU-3312) Block Diagram

VL-EPU-3312 Reference Manual 11

Dimensions and Mounting

Raven Dimensions

Figure 3 provides the board’s dimensions.

Introduction

Figure 3. Raven Dimensions and Mounting Holes

(Not to scale. All dimensions in millimeters.)

VL-EPU-3312 Reference Manual 12

Mounting Plate Dimensions

Introduction

Figure 4. Mounting Plate Dimensions

(Not to scale. All dimensions in millimeters.)

VL-EPU-3312 Reference Manual 13

2

Initial Configuration

The following components are recommended for a typical development system with the Raven
EPU:

 ATX power supply
 VL-CBR-4005B paddleboard and VL-CBR-4005A cable. Refer to the chapter titled “VL-

CBR-4005B Paddleboard”, beginning on page 55 for details on the VL-CBR-4005B
paddleboard.

 USB keyboard and mouse
 SATA hard drive
 USB CD-ROM drive

Configuration and Setup

Configuration and Setup

 VGA monitor and a VL-CBR-2032 Mini DisplayPort-to-VGA adapter
 A thermal solution (using either VersaLogic accessories or a customer-designed solution)

You will also need an operating system (OS) installation CD-ROM.

Basic Setup

The following steps outline the procedure for setting up a typical development system. The
Raven should be handled at an ESD workstation or while wearing a grounded antistatic wrist
strap.

Before you begin, unpack the Raven and accessories. Verify that you received all the items you
ordered. Inspect the system visually for any damage that may have occurred in shipping. Contact

[e-mail] immediately if any items are damaged or missing.

Gather all the peripheral devices you plan to attach to the Raven as well as their interface and
power cables. Attach standoffs to the board to stabilize it and make it easier to work with.

Figure 5 shows a typical setup for the Raven in the development environment.

VL-EPU-3312 Reference Manual 14

Configuration and Setup

igure 5. Typical Development Configuration

1. Attach Cables and Peripherals

 Attach a VGA monitor to the baseboard’s Mini DisplayPort++ connector using a VL-CBR-

2032.

 Attach a SATA hard disk to the baseboard’s SATA connector using a VL-CBR-0701 or VL-

CBR-0702 cable.

 Attach a VL-CBR-4005B paddleboard to the baseboard’s User I/O connector.
 Connect a USB keyboard and USB mouse to the USB Type-A connectors on the VL-CBR-

4005B paddleboard.

 Attach a USB CD-ROM drive to one of the USB Type-A connectors on the VL-CBR-4005B

paddleboard.

2. Connect Power Source

 Plug the power adapter cable VL-CBR-0809 into the main power connector on the

baseboard. Attach the motherboard connector of the ATX power supply to the adapter.

 Attach an ATX power cable to any 3.5-inch drive that is not already attached to the power

supply (hard drive or CD-ROM drive).

VL-EPU-3312 Reference Manual 15

3. Review Configuration

CAUTION: If BIOS default settings make the system unbootable and prevent the user

from entering the BIOS Setup utility, the Raven must be serviced by the factory.

 Before you power up the system, double-check all the connections. Make sure all cables are

oriented correctly, that adequate power is supplied to the Raven and all attached peripheral
devices.

4. Power On

 Turn on the ATX power supply and the video monitor. If the system is correctly configured,

a video signal should be present.

5. Install Operating System

 Install the operating system according to the instructions provided by the operating system

manufacturer.

BIOS Setup Utility

Refer to the VersaLogic System Utility Reference Manual for information on how to configure
the Raven BIOS.

Configuration and Setup

The Raven permits you to store user-defined BIOS settings. This enables you to retrieve those
settings from cleared or corrupted CMOS RAM, or battery failure. All BIOS defaults can be
changed, except the time and date. BIOS defaults can be updated with the BIOS Update Utility.

Default BIOS Setup Values

After CMOS RAM clears, the system loads default BIOS parameters the next time the board
powers on. The default CMOS RAM setup values are used in order to boot the system whenever
the main CMOS RAM values are blank, or when the system battery is dead or has been removed
from the board.

Operating System Installation

The standard PC architecture used on the Raven makes the installation and use of most of the
standard x86-based operating systems very simple. The operating systems listed on the

VersaLogic Software Support page use the standard installation procedures provided by the

maker of the operating system. Special optimized hardware drivers for a particular operating
system, or a link to the drivers, are available on the Raven Support Page.

VL-EPU-3312 Reference Manual 16

Jumper Blocks

Jumper

Block

Pins

Function

Description

V1

1-2

COM2 Endpoint

Termination

 Jumper In: Endpoint termination (for RS-485 or RS-422)
 Jumper Out: Not terminated (RS-232) (default)

3-4

COM1 Endpoint

termination

 Jumper In: Endpoint termination (for RS-485 or RS-422)
 Jumper Out: Not terminated (RS-232) (default)

V2

1-2

COM3 Endpoint

Termination

 Jumper In: Endpoint termination (for RS-485 or RS-422)
 Jumper Out: Not terminated (RS-232) (default)

3-4

COM4 Endpoint

termination

 Jumper In: Endpoint termination (for RS-485 or RS-422)
 Jumper Out: Not terminated (RS-232) (default)

V3

1-2

Primary/Backup

BIOS Select

 Jumper In: Use Backup BIOS
 Jumper Out: Use Primary BIOS (default)

V4

1-2

Backup BIOS

Write Protect

 Jumper In: Backup BIOS is write-protected
 Jumper Out: Backup BIOS is not write-protected (default)

Jumper As-Shipped Configuration

Configuration and Setup

Figure 6. Jumpers As-Shipped Configuration

Jumper Configuration Summary

Table 1: Jumper Block Configurations

VL-EPU-3312 Reference Manual 17

CPU

Board Model

Memory Type

Capacity

Data Rate

VL-EPU-3312-EAP

DDR3L

2 GB

1066 MT/s – Single Channel

VL-EPU-3312-EBP

DDR3L

2 GB

1333 MT/s – Dual Channel

VL-EPU-3312-EDP

DDR3L

4 GB

1333 MT/s – Dual Channel

3

Board Features

Board Features

The Intel Atom E38xx SoC features integrated 3D graphics, video encode and decode, and
memory and display controllers in one package. The following CPU configurations are available:

 VL-EPU-3312-EAP: Intel Atom 3815 – 1.46 GHz, Single Core
 VL-EPU-3312-EBP: Intel Atom 3827 – 1.75 GHz, Dual Core
 VL-EPU-3312-EDP: Intel Atom 3845 – 1.91 GHz, Quad Core

CPU Die Temperature

The CPU die temperature is affected by numerous conditions, such as CPU utilization, CPU
speed, ambient air temperature, airflow, thermal effects of adjacent circuit boards, external heat
sources, and many others.

The thermal management for the Intel Atom E38xx series of processors consists of a sensor
located in the core processor area. The processor contains multiple techniques to help better
manage thermal attributes of the processor. It implements thermal-based clock throttling and
thermal-based speed step transitions. There is one thermal sensor on the processor that triggers
Intel's thermal monitor (the temperature at which the thermal sensor triggers the thermal monitor
is set during the fabrication of the processor). Triggering of this sensor is visible to software by
means of the thermal interrupt LVT entry in the local APIC. (See the Intel Atom Processor

E3800 Series Datasheet for complete information.)

System RAM

The Raven has soldered-on SDRAM with the following characteristics:

Flash Storage

The Raven provides on-board eMMC* Flash storage on certain models of the product:

Table 2: Raven Memory Characteristics

 VL-EPU-3312-EAP: none
 VL-EPU-3312-EBP: 4 GB
 VL-EPU-3312-EDP: 8 GB

VL-EPU-3312 Reference Manual 18

I/O Interfaces

Later chapters describe the Raven’s I/O interfaces and their associated connectors as follows:

 Mass Storage Interfaces (SATA, microSD, and eMMC Flash), beginning on page 29
 Multi-purpose I/O (USB, Mini PCIe / mSATA, User I/O), beginning on page 31
 Serial I/O, beginning on page 43
 Video Interfaces (Mini DisplayPort++ and LVDS), beginning on page 46
 Network Interfaces, beginning on page 52

Real-Time Clock (RTC)

The Raven features a real-time clock/calendar (RTC) circuit. The Raven supplies RTC voltage in
S5, S3, and S0 states, but requires an external +2.75 V to +3.3 V battery connection. Refer to the
section titled Battery Power Options on page 24 for more information. The BIOS Setup utility
sets the RTC.

Board Features

Watchdog Timer

The Raven has a watchdog timer that contains a selectable pre-scaler approximately 1 as to
10 minutes. The BIOS Setup utility configures the watchdog timer.

VL-EPU-3312 Reference Manual 19

External Connectors

 Analog input – page 39

 Main Power – page 21

 Battery – page 24

 microSD – page 30

 COM1/COM2 – page 43

 Mini DisplayPort++ – page 46

 COM3/COM4 – page 43

 Mini PCIe Sockets 1 and 2 – page

32

 CPU Fan – page 26

 SATA – page 29

 Ethernet – page 52

 SPX – page 41

 LVDS Backlight – page 51

 USB 3.0 – page 31

 LVDS Display – page 49

 User I/O – page 56

Baseboard Connector Locations

Board Features

VL-EPU-3312 Reference Manual 20

Figure 7. Baseboard Connector Locations

Table 3: Links to Sections Describing Connectors

Power Delivery

Main Power Connector

An 8-pin power connector applies the Main input power to the Raven. Figure 8 shows the
location and the pin orientation of the main power connector. Table 4 lists the pinout of the main
power connector.

Board Features

Figure 8. Main Power Connector Pin Orientation

VL-EPU-3312 Reference Manual 21

Pin

Signal

Description

Pin

Signal

Description

1

V_MAIN

Main input voltage

(+8V to +30V)

2

V_MAIN

Main input voltage

(+8V to +30V)

3

EARTH_GND

Earth ground

4

V_MAIN

Main input voltage

(+8V to +30V)

5

POWER_FAULT

An open-drain signal

 Low if power is OK
 Open if there is a

power fault (Note)

6

GND

Signal ground

7

GND

Signal ground

8

GND

Signal ground

Note: A power fault can be due any of the following conditions:

 The input power is off.
 The main input regulator has failed.
 The power input is under- or over-voltage (not in the 8 - 30V range) .

Cabling

VL-EPU-3312 Board Connector

Mating Connector

Molex 055959-0830

Molex 051353-0800

Board Features

Table 4: Main Power Connector Pinout

An adapter cable, part number VL-CBR-0809, is available for connecting the Raven to an ATX
power supply.

If your application requires a custom cable, the following information will be useful:

Power Requirements

The Raven requires a single +8 to +30 VDC supply capable of providing at least 35 W average
power that can also provide a peak power of 50 W. The input DC supply creates both the standby
and payload voltages provided to the CPU module.

The exact power requirements for the Raven depend on several factors, including CPU
configuration (the number of cores, CPU clock rate), memory configuration, peripheral
connections, and attached devices, and others. For example, driving long RS-232 lines at high
speed can increase power demand.

The VersaLogic VL-PS-ATX12-300A is a 1U size ATX power supply suitable for use with the
Raven. Use the VL-CBR-0809 adapter cable to attach the power supply to the main power
connector.

Power Delivery Considerations

Using the VersaLogic approved power supply (VL-PS-ATX12-300A) and power cable
(VL-CBR-0809) will ensure high quality power delivery to the board. Customers who design
their own power delivery methods should take into consideration the guidelines below to ensure
good power connections.

The specifications for typical operating current do not include any off-board power usage that
fed through the Raven power connector. Expansion boards and USB devices plugged into the
board will source additional power through the Raven power connector.

VL-EPU-3312 Reference Manual 22

Board Features

Power state

Description

S0 (G0)

Working

S1 (G1-S1)

All processor caches are flushed and the CPUs stop executing instructions. Power to
the CPUs and RAM is maintained. Devices that do not indicate they must remain on
may be powered down.

S3 (G1-S3)

Commonly referred to as Standby, Sleep, or Suspend-to-RAM. RAM remains powered.

S4 (G1-S4)

Hibernation or Suspend-to-Disk. All content of main memory is saved to non-volatile
memory, such as a hard drive, and is powered down.

S5 (G2)

Soft Off. Almost the same as G3 Mechanical Off, except that the power supply still
provides power, at a minimum, to the power button to allow return to S0. A full reboot is
required. No previous content is retained. Other components may remain powered so
the computer can "wake" on input from the keyboard, clock, modem, LAN, or USB
device.

G3

Mechanical off (ATX supply switch turned off).

 Do not use wire smaller than 22 AWG. Use high quality UL 1007 compliant stranded wire.
 The length of the wire should not exceed 18 inches.
 Avoid using any additional connectors in the power delivery system.
 The power and ground leads should be twisted together, or as close together as possible to

reduce lead inductance.

 A separate conductor must be used for each of the power pins.
 All power input pins and all ground pins must be independently connected between the

power source and the power connector.

 Use a high quality power supply that can supply a stable voltage while reacting to widely

varying current draws.

Power Button

The User I/O connector (shown in Figure 20 on page 37) includes an input for a power button. A
momentary short to ground or assertion of pin 17 will cause a power button ACPI event. The
button event can be configured in Windows to enter an S3 power state (Sleep, Standby, or
Suspend-to-RAM), an S4 power state (Hibernate or Suspend-to-Disk), or an S5 power state
(Shutdown or Soft-Off). This connector uses IEC 61000-4-2-rated TVS components to help
protect against ESD damage.

A power button is provided on the VL-CBR-4005B paddleboard. Refer to the chapter titled VL­CBR-4005B Paddleboard, beginning on page 55 for more information.

Supported Power States

Table 5 lists the Raven’s supported power states.

Table 5: Supported Power States

VL-EPU-3312 Reference Manual 23

Board Features

VL-EPU-3312 Board Connector

Mating Connector

Molex 501331-0207

Molex 501330-0200

Battery Power Options

The battery circuit on the Raven provides power for the Real-Time Clock (RTC) and power to
store BIOS Setup utility settings in non-volatile RAM.

The Raven has multiple options for providing battery power:
 Use an external battery (the VL-CBR-0203, for example) connected to the board through the

battery connector.

 Use the battery supplied with the CBR-4005B paddleboard
Figure 9 shows the location and pin orientation of the battery connector.

Cabling

If your application requires a custom cable, the following information will be useful:

VL-CBR-0203 External Battery Module

The VL-CBR-0203 external battery module is compatible with the Raven. For more information,
contact [e-mail].

VL-EPU-3312 Reference Manual 24

Figure 9. Location and Pin Orientation of the Battery Connector