VersaLogic Tetra VL-EPC-2700 Hardware Reference Manual

I2C

Hardware
Reference
Manual

REV. June 2018

Tetra
(VL-EPC-2700)

Arm* i.MX6 Single Board Computer
with Gigabit Ethernet, Video, USB,
SATA, Serial I/O, Digital I/O, CAN
Bus, SPI, Mini PCIe, mSATA and

WWW.VERSALOGIC.COM

12100 SW Tualatin Road
Tualatin, OR 97062

-7341

[phone]

Fax [phone]

Copyright © 2018

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.

ii Tetra (VL-EPC-2700) Reference Manual

Product Release Notes

Rev 1.00

Production release for the Rev 1.0 board

Rev 1.10

Added backup battery information

Updated the Block Diagram for clarity. Added PCI Messaging interrupt information
in the Known Issues section.

Rev 1.30

Rev 1.20

Added CBR-0406

Support Page

The Tetra 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

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
Ground delivery to United States addresses.

or engineer that can be contacted if any questions arise

covered, including return shipping charges for UPS

Non-warranty Repair: All approved non-warranty repairs are subject
charges, parts charges

purchase order number for invoicing the repair.

and return shipping fees. Specify the shipping method you prefer and provide a

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

Tetra (VL-EPC-2700) Reference Manual iii

to diagnosis and labor

Contents

Introduction ................................................................................................................... 6

Description .......................................................................................................................... 6

Features and Construction ..................................................................................... 6

Technical Specifications ..................................................................................................... 7

Thermal Considerations ...................................................................................................... 7

Block Diagram .................................................................................................................... 9

Cautions ............................................................................................................................ 10

Electrostatic Discharge ........................................................................................ 10

Handling Care ...................................................................................................... 10

Earth Ground Requirement .................................................................................. 10

Configuration and Setup ............................................................................................. 11

Initial Configuration ......................................................................................................... 11

Basic Setup ....................................................................................................................... 11

Physical Layout ................................................................................................................ 12

Tetra Dimensions ................................................................................................. 12

Hardware Assembly ............................................................................................. 12

External Connectors ......................................................................................................... 13

System Features .......................................................................................................... 16

Power Supply .................................................................................................................... 16

Power Connectors ................................................................................................ 16

Power Requirements ............................................................................................ 16

CPU ................................................................................................................................... 16

System RAM ..................................................................................................................... 16

Interfaces and Connectors ......................................................................................... 17

Connectors and Jumpers ................................................................................................... 17

Storage Interfaces ............................................................................................................. 18

SATA Interface (J2) ............................................................................................ 18

Minicard Interface (J3) ........................................................................................ 18

MicroSD Interface (J4) ........................................................................................ 20

Network Interface ............................................................................................................. 20

Ethernet Interface (J5) ......................................................................................... 20

Video Interfaces ................................................................................................................ 21

HDMI (J6) ........................................................................................................... 21

LVDS (J7) ............................................................................................................ 21

iv Tetra (VL-EPC-2700) Reference Manual

LVDS Backlight (J8) ........................................................................................... 22

I/O Interfaces .................................................................................................................... 23

USB Interfaces (J1) ............................................................................................. 23

Serial I/O (J12) .................................................................................................... 23

User I/O (J13) ...................................................................................................... 24

Audio (J10) .......................................................................................................... 25

CAN Interface (J17, J18) ..................................................................................... 25

COM1 Interface (J16) .......................................................................................... 25

Low Cost Camera Interface (J9) .......................................................................... 25

Power Button .................................................................................................................... 26

Appendix A – References............................................................................................ 27

Figures

Figure 1. Major Components and Connectors ................................................................................................. 7

Figure 2. Tetra Board Block Diagram ............................................................................................................. 9

Figure 3. Tetra Board Dimensions and Mounting Holes ............................................................................... 12

Figure 4. Connector Locations (Top Side) .................................................................................................... 13

Tables

Table 1. Environmental Specifications ........................................................................................................... 7

Table 2. Connector Functions and Interface Cables ...................................................................................... 14

Table 3. Jumper Information ......................................................................................................................... 15

Table 4. J15 Main Power Connector Pinout .................................................................................................. 16

Table 5. V1 Pinout ........................................................................................................................................ 17

Table 6. V2 Pinout ........................................................................................................................................ 17

Table 7. J2 SATA Pinout .............................................................................................................................. 18

Table 8. J3 Minicard Pinout .......................................................................................................................... 18

Table 9. J4 microSD Pinout .......................................................................................................................... 20

Table 10. J5 Ethernet RJ45 Pinout ................................................................................................................ 20

Table 11. HDMI Connector Pinout ............................................................................................................... 21

Table 12. LVDS Connector Pinout ............................................................................................................... 21

Table 13. LVDS Backlight Connector Pinout ............................................................................................... 22

Table 14. USBx2 2.0 Connector Pinout ........................................................................................................ 23

Table 15. Serial I/O Pinouts .......................................................................................................................... 23

Table 16. User I/O Pinouts ............................................................................................................................ 24

Table 17. Audio Jack Pinout ......................................................................................................................... 25

Table 18. CAN Pinouts ................................................................................................................................. 25

Table 19. COM1 Pinout ................................................................................................................................ 25

Table 20. Camera Pinouts ............................................................................................................................. 26

Table 21. Power Buttons and Designator ...................................................................................................... 26

Tetra (VL-EPC-2700) Reference Manual v

Description

 Arm* i.MX6 quad-core processor

 Mini PCIe or mSATA socket

1

Features and Construction

The Tetra is a compact embedded computer system featuring very low power consumption.
Designed around an NXP i.MX6 quad-core processor, the entire board typically uses about 4W of
power. Multiple on-board I/O interfaces and soldered-on memory offers system designers a
flexible, reliable, low-power platform. In addition, the Tetra also contains a full complement of on­board I/O interfaces, including USB 2.0, a mini PCIe expansion or mSATA socket, Gigabit
Ethernet, multiple serial interfaces, and 8-bits of digital I/O.

Tetra is designed to operate with no moving parts and is tested to withstand extreme
temperatures, high-impact, and vibration. A built-in power supply permits 8 to 17 volt input, such
as 12 volt automotive systems. This single board computer is an ideal choice for applications that
require moderate performance, low-power, highest quality, and long product life.

Introduction

 95 x 125mm size

 Low power draw

 Fanless Operation

 Up to 4 GB soldered-on RAM

 Gigabit Ethernet

 HDMI and LVDS video

 CAN Bus

 MIPI camera input

VL-EPC-2700 boards are subjected to complete 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 single-board
computer (SBC).

 USB 2.0 ports

 Serial I/O (RS-232)

 SATA II port

 MicroSD card socket

 128 KB Magnetic RAM

 eMMC Flash. Up to 32 GB

 SPI

2

 I

C

 Eight 3.3V GPIO and three PWM

outputs

vi Tetra (VL-EPC-2700) User’s Guide

Introduction

Characteristic

Value

The next figure shows the locations of the Tetra board’s connectors and major components on the
top.

Figure 1. Major Components and Connectors

Technical Specifications

See the Tetra Data Sheet for complete specifications.

Thermal Considerations

The operating temperature for the Tetra is -40°C to +85°C, de-rated -1.1 °C per 305m (1,000 ft.)
above 2,300m (7,500 ft.).

Table 1. Environmental Specifications

Operating Temperature Ext Temp (-40°C to +85°C)

Storage Temperature -40 to +85

Cooling Fanless. Heatsink for SoC

Airflow Requirements 100 Linear Feet per Minute

Thermal Shock 5ºC/min. over operating temperature

Humidity Less than 95%, noncondensing

Tetra (VL-EPC-2700) User’s Guide 7

Introduction

Characteristic Value

Vibration, Sinusoidal Sweep MIL-STD-202G

Sinusoidal sweep: Method 204, Modified Condition A, 2g constant
acceleration from 5 to 500 Hz, 20 minutes per axis

Vibration, Random Random vibration: Method 214A, Condition A, 5.35g rms, 5 minutes per

axis

Mechanical Shock Shock: Method 213B, Condition G, 20g half-sine, 11 msec duration per

axis

8 Tetra (VL-EPC-2700) Reference Manual

Introduction

Serial Interfaces Header (CBR-2603)

I2C1 I2C2

NXP

i.MX6

ARM Cortex A-9

SoC

(Quad)

I2S Stereo

Audio

CODEC

Gigabit

Ethernet

PHY

LVDS
Video

Output

MiniPCIe

or

mSATA

User I/O Header

(CBR-3407)

DDR3L
SDRAM

DDR3L Soldered Devices

Audio

Line
In

Audio

Line
Out

RTC

Battery

Program

LED

Type A

Stacked Dual

Port USB

Connectors

USB0

1.1/2.0

USB1

1.1/2.0

HDMI
Video

Output

DDR3L
SDRAM

DDR3L
SDRAM

DDR3L
SDRAM

On-Board

Key:

Interface

GPIO x8
Optional
PWM x2 /

Timer

WDOG#

Ethernet

LED

UART3

2-wire

Headphon e
(stereo) and
Microphon e
Connector

Gigabit
Ethernet
Magjack

RJ45

CSI

Camera

Input

Accelerometer
Magnetometer

SATA

microSD

eMMC

8GB

USB HUB

2-Port

A

A

SD2

SD4

B

B

HDMI TX

ESD/5V

I2C2

HDMI

MRAM
128KB

64K x 16

SPI NOR Flash
U-Boot Device

B

V2

Jumper

LVDS x1 Channel(24-bit)

GPIO x2

MIPI CSI and GPIOx2

SATA

PCIe x1

I2C2

Res
Mux

Res
Mux

AUDIO5

GPIO

GPIO x8

GPIO

I2C3

RGMII

I2C1

I2C2 ECSPI3

CAN1

CAN2

UART1 UART3

ECSPI1

V1

Jumper

BOOT_MODE[0]BOOT_MODE[1] NC (PD internal)

USB Host

USB OTG

GPIO

Alternate

Power

V_MAIN

SPI3

3-Slave Selects

Off-board

Reset

Power/GND

3.3V

General

Purpose IRQ#

CAN1 &

CAN2

XCVRS

COM1
RS232
XCVR

PMIC

PF0100A

VREFDDR

VGEN1

VGEN2

VGEN3

VGEN5

VGEN6

V4P2

V1P375_CORE

SW1AB

SW1C

SW2

SW3AB

SWBST
VGEN4

SW4

LICELL VSNVS

V1P375_SOC

V3P3

V1P35_DDR

V0P675_DDR_VTT

V0P675_DDR_VREF

V1P5_MINI

V1P2_ETH

V1P8_AUDIO

V3_ALWAYS

V2P5_ETH

V3_VSNVSBATT

COM1
4-wire

CAN2

CAN1

Block Diagram

Figure 2. Tetra Board Block Diagram

Tetra (VL-EPC-2700) User’s Guide 9

Cautions

Electrostatic discharge (ESD) can damage circuit boards, disk drives, and other

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.

Ship and store the board inside a closed metallic antistatic envelope for protection.

Avoid touching the exposed circuitry with your fingers when handling the board. Though

defaults.

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

Electrostatic Discharge

Note:

battery drain if the bag is in contact with the bottom side of the Tetra.

Introduction

CAUTION:

components. Handle circuit board at an ESD workstation. If an approved station is not
available, wearing a grounded antistatic wrist strap provides some measure of
protection. Keep all plastic away from the board, and do not slide the board over any

The exterior coating on some metallic antistatic bags is sufficiently conductive to cause excessive

Handling Care

CAUTION:

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

Earth Ground Requirement

CAUTION:

10 Tetra (VL-EPC-2700) Reference Manual

2

Configuration and Setup

Initial Configuration

Use the following components for a typical development system:

 Tetra (VL-EPC-2700) computer
 VL-PS-WALL12-24 – 90 ~ 264 VAC to 12VDC @ 2A, 2.1mm ID Plug, International
 VL-F41-8SBN-LINUX1 – 8GB microSD card with bootable Linux, standard temp
 VL-HDW-108 – M2.5 x 6 mm Metric Nylon Screw kit (10ea) RoHS
 USB keyboard and mouse
 HDMI monitor and cable

Note: VL-CKR-Tetra includes: VL-F41-8SBN-LINUX1, CBR-0504, 2603, 3407, PS-WALL12-24,
HDW-108

Use the following VersaLogic cables for wiring access points to serial (J12) and user (J13)
interfaces:

 VL-CBR-2603 -- 0.5m 26-pin 2mm IDC to Ribbon Cable

 VL-CBR-3407 – 0.5m 34-pin 2mm IDC to Ribbon Cable

Basic Setup

1. Attach Cables and Peripherals

 Attach a HDMI display to the HDMI connector at J6.Plug a USB keyboard, and a USB

mouse into the USB connectors at J1 (Note if using the top USB port, you must install the
jumper on V2 pins 1-2 for the OTG USB port to be placed in Host mode. Alternatively,
you can use an external powered USB Hub to provide separate mouse and keyboard
connections for the bottom USB port.)

 Insert a VL-F41-8SBN-LINUX1 MicroSD card into the MicroSD slot located at J4

2. Attach Power

 Plug the power adapter cable VL-PS-WALL12-24 into the power jack J15.

3. Review Configuration

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

are oriented correctly and that there is adequate power to the VL-EPC-2700 and
peripheral devices.

Tetra (VL-EPC-2700) User’s Guide 11

4. Power On

 Turn on the power supply and the video monitor. The presence of a video signal indicates

proper configuration of the system.

Note: Booting and operating the Yocto Linux operating system is covered in the VersaLogic Yocto
Linux User Guide.

Physical Layout

Tetra Dimensions

The figure below shows board dimensions to help with pre-production planning and layout.

Figure 3. Tetra Board Dimensions and Mounting Holes

(Not to scale. All dimensions in millimeters.)

Configuration and Setup

Hardware Assembly

The entire assembly can fit on a tabletop. When bolting the unit down, make sure to secure all
standoffs to the mounting surface to prevent circuit board flexing. Standoffs secure the top circuit
board using four pan head screws.

12 Tetra (VL-EPC-2700) Reference Manual

Configuration and Setup

External Connectors

Figure 4. Connector Locations (Top Side)

Tetra (VL-EPC-2700) User’s Guide 13

Configuration and Setup

Connector

(Note)

Transition

Cable

mode (V2 jumper off).

J2

SATA

Standard SATA

VL-CBR-0702

Latching Cable

J3

Minicard PCIe or

—

Tetra model dependent (-02A:

type Minicard)

J4

MicroSD

8GB microSD card with

—

VL-F41-8SBNLINUX1 (Standard

Temperature)

J5

Ethernet

RJ45 Crimp-on Plug

Cat5e Ethernet Patch Cable

J6

HDMI

Standard HDMI

—

—

J7

LDVS

Hirose DF19G-20P-1H(54)

Hirose 1.25mm 24-bit cable

J8

LDVS Backlight

Molex 5013300400

VL-CBR-0404

20" 12V LED Backlight Control
Cable

J9

MIPI Camera

FFC/FPC, 15-Pos, 1mm
pitch

FFC/FPC
Cable

—

J10

Audio

3.5mm 4-Pole Audio Plug

—

TRRS Male 4-Conductor Audio
Devices like a PC Headset

J12

Serial I/O

26-pin 2mm pitch IDC Male

VL-CBR-2603

J13

User I/O

34-pin 2mm pitch IDC Male

VL-CBR-3407

J15

Power

DC Power Jack, 2.0mm

AC/DC 12V - VL-PS-WALL12-24

VL-CBR-0504

VL-CBR-0405

2 mm 4-pin to 2 mm 4-pin

connector, 0.5m

Tetra Connector Functions and Interface Cables

The table below provides information about the function, mating connectors, and transition cables
for Tetra connectors.

Table 2. Connector Functions and Interface Cables

Function Mating Connector/Device

J1 USB (dual

stacked)

mSATA

Standard USB Type A

MPEe/MPEu/MPEs
Minicards

bootable Linux
2GB microSD card

4GB microSD card

8GB microSD card

—

VL-CBR-0701

VL-CBR-2015

VL-CBR-2016

VL-CBR-2017

Cable/Device Description

Male Type A USB 2.0 to Male
Type B for downstream devices,
Male Type A USB 2.0 to Male
Type A USB 2.0 for top port only
when OTG port is set as Device

Standard Cable

mSATA or USB type Minicard, ­02B & -EVAL: MiniPCIe or USB

Temperature)
VL-F41-2EBN

(ExtendedTemperature)
VL-F41-4EBN (Extended

Temperature)
VL-F41-8EBN (Extended

20-pin Hirose 1mm to Hirose
1mm 24-bit cable

20-pin Hirose 1mm to JAE

1.25mm 18-bit cable

20-pin Hirose 1mm to 20-pin

14 Tetra (VL-EPC-2700) Reference Manual

J16 COM1

J17, J18 CAN

positive center pin

VL-CBR-0406

MicroClasp, 1m

2 mm 4-pin MicroClasp to DB9

Configuration and Setup

EPC-2700

Designator

Signal Name

Control/Description

V1

BOOT_MODE0

BOOT_MODE0 setting, to allow use

jumper is removed.

V2

USB_OTG_ID

Install jumper to set USB_OTG port to

Device Mode

Table 3. Jumper Information

Reference

EPC-2700

of USB OTG Device communications
using the NXP i.MX6 Serial
Downloader method. When this
jumper is installed V2 should not be
installed! Normal eFuse selected
boot via SPI NOR Flash U-Boot and
microSD card Yocto Linux when the

host mode. No jumper sets port to

Tetra (VL-EPC-2700) User’s Guide 15

To prevent severe and possibly irreparable damage to the system, it is critical that the

protected. Proper polarity must be followed otherwise damage will occur.

Ground when no plug,
open otherwise.

VL-EPC-2700-EDK-02A

3.0W

4.2W

6.9W

VL-EPC-2700-EDK-02B

3.1W

4.5W

8.5W

VL-EPC-2700-EDK-EVAL

3.1W

4.5W

8.5W

3

Power Supply

Power Connectors

Main power is applied to the Tetra through a 4-pin connector (J15), with mating connector
VersaLogic VL-PS12-24 (12V). See the table below for connector pinout.

CAUTION:

power connectors are wired correctly. The power connector is not fuse or diode

Table 4. J15 Main Power Connector Pinout

System Features

CPU

Pin Signal Description

1 V_MAIN (first pin) Center Pin Voltage

1 V_MAIN (second pin) Center Pin Voltage

2 Ground Ground

3 Plug Detection

Power Requirements

Model Idle Typical Max.

Note: The VL-EPC-2700 does not come with an on-board RTC backup battery. The VL-CKR-

TETRA Cable kit includes a User Interface breakout cable (VL-CBR-3407) that connects to the
J13 connector. It is an open ended-cable that can connect a backup battery on pins 29 (V_BATT)
and pin 30 (Return_Battery/Ground). A connector and/or external battery is then hardwired.

The Tetra uses a low power Arm i.MX6 quad-core processor featuring:

 i.MX 6Quad (quad Arm Cortex-A9 core) - Specifications

System RAM

The Tetra ships with soldered-on DDR3L RAM. 2GB of RAM is on standard products, but custom
options allow memory capacities down to 1GB or up to 4GB.

16 Tetra (VL-EPC-2700) Reference Manual

Pin

Signal Name

1

PU_BOOT_MODE0

2

BOOT_MODE0

Pin

Signal Name

1

USB_OTG_ID

2

GND

4

Interfaces and Connectors

Connectors and Jumpers

V1 – BOOT_MODE0 Jumper

The EPC-2700 uses a jumper to provide access to two required boot modes. BOOT_MODE[1:0]
are input pins on the i.MX6 quad-core processor, and when not connected, the signals are held
low by 100k Ohm pull-downs internal to the SoC. By default, the jumper is in the store position
resting on pin 2 (open) and the BOOT_MODE[1:0] settings of “00” select the default mode of
“Boot from fuses.”

Note: When the fuses have not yet been blown (OTP), the boot attempt will automatically switch
to the “Serial downloader” method for the i.MX 6. It then, may accept commands and
programming from a USB Host (provided that the V2 jumper is removed/stored - setting the USB
OTG port in Device mode).

The only time the jumper needs to be placed on pins 1-2 (BOOT_MODE[1:0] settings of “01”) is to
force the boot mode to use the “Serial downloader” instead of the fuses. At that point, a new
image can be loaded to the on-board memory device (like the SPI Flash) or new DDR device
Calibrations and Stress Testing can be run.

Do not hot-plug this jumper. There is no ESD protection employed and the settings are only read
when POR# is tripped.

VersaLogic part number for the jumper header is X2H2S1-R.

Table 5. V1 Pinout

V2 - USB_OTG_ID Jumper

The EPC-2700 uses a jumper to provide control settings for the USB OTG block, allowing it to function
as either an OTG port set to device mode or set to host mode. By default, the jumper is in the store
position resting on pin 2 (open) so that the USB_OTG_ID signal is pulled high (device mode).

When the jumper is placed on pins 1-2, the USB_OTG_ID signal is grounded, which forces the
i.MX6 quad-core processor OTG port to behave as a Host enabling VBUS 5V power switch for the
USB port.

Note: Do not hot-plug this jumper. Host Negotiation Protocol (HNP) is not enabled for the port and
there is no ESD protection employed.

VersaLogic part number for the jumper header is X2H2S1-R.

Table 6. V2 Pinout

Tetra (VL-EPC-2700) User’s Guide 17

Storage Interfaces

Pin

Signal

1

GND

2

SATA_TX_P

3

SATA_TX_N

4

5

SATA_RX_N

6

SATA_RX_P

7

GND

Pin

mSATA Signal

Signal

Pin

mSATA Signal

Signal

1

Reserved (NC)

WAKE#

2

+3.3V

+3.3V

3

Reserved (NC)

COEX1

4

GND

GND

5

Reserved (NC)

COEX2

6

+1.5V

+1.5V

7

Reserved (NC)

CLKREQ#

8

Reserved (NC)

UIM_PWR

9

GND

GND

10

Reserved (NC)

UIM_DATA

11

Reserved (NC)

REFCLK_N

12

Reserved (NC)

UIM_CLK

13

Reserved (NC)

REFCLK_P

14

Reserved (NC)

UIM_RESET

15

GND

GND

16

Reserved (NC)

UIM_SPU

17

Reserved (NC)

UIM_IC_DM

18

GND

GND

19

Reserved (NC)

UIM_IC_DP

20

Reserved (NC)

W_DISABLE1#

21

GND

GND

22

Reserved (NC)

PERST#

23

SATA_RX_P

PER0_N

24

+3.3V

+3.3V

25

SATA_RX_N

PER0_P

26

GND

GND

27

GND

GND

28

+1.5V

+1.5V

29

GND

GND

30

SMB_CLK

SMB_CLK

31

SATA_TX_N

PET0_N

32

SMB_DATA

SMB_DATA

33

SATA_TX_P

PET0_P

34

GND

GND

35

GND

GND

36

Reserved (NC)

USB_N

SATA Interface (J2)

The table below lists the pinout of the 7-pin SATA connector.

Table 7. J2 SATA Pinout

GND

Interfaces and Connectors

Minicard Interface (J3)

The table below lists the pinout of the 52-pin Minicard connector.

Table 8. J3 Minicard Pinout

PCIe Minicard

PCIe Minicard

18 Tetra (VL-EPC-2700) Reference Manual

Interfaces and Connectors

Pin

mSATA Signal

Signal

Pin

mSATA Signal

Signal

37

GND

GND

38

Reserved (NC)

USB_P

39

+3.3V

+3.3Vaux

40

GND

GND

41

+3.3V

+3.3Vaux

42

Reserved (NC)

LED_WW AN#

43

No Connect (some
GND)

GND

44

Reserved (NC)

LED_WLAN#

45

Vendor Specific

Reserved

46

Reserved (NC)

LED_WPAN#

47

Vendor Specific

Reserved

48

+1.5V

+1.5V

49

DAS/DSS (or NC)

Reserved

50

GND

GND

51

Presence Detect (or
NC)

W_DISABLE2#

52

+3.3V

+3.3V

PCIe Minicard

PCIe Minicard

Tetra (VL-EPC-2700) Reference Manual 19

Interfaces and Connectors

Pin

Signal

1

DAT2

2

CD/DAT3

3

CMD

4

VDD (+3.3V)

5

CLK

6

VSS (GND)

7

DAT0

8

DAT1

#

(CAT5E)

10/100 Signals

Signals

1

White/Orange

+ Auto Switch (can be either Tx or Rx)

BI_DA+

2

Orange

- Auto Switch (can be either Tx or Rx)

BI_DA-

3

White/Green

+ Auto Switch (can be either Tx or Rx)

BI_DB+

4

Blue

+ Auto Switch (can be either Tx or Rx)

BI_DC+

5

White/Blue

- Auto Switch (can be either Tx or Rx)

BI_DC-

6

Green

- Auto Switch (can be either Tx or Rx)

BI_DB-

7

White/Brown

+ Auto Switch (can be either Tx or Rx)

BI_DD+

8

Brown

- Auto Switch (can be either Tx or Rx)

BI_DD-

MicroSD Interface (J4)

The table below lists the pinout of the 8-pin MicroSD connector.

Supported VersaLogic SLC extended temperature cards:

• VL-F41-2EBN (2 GB)

• VL-F41-4EBN (4GB)

• VL-F41-8EBN (8 GB)

Note: MicroSD card number VL-F41-8SBN-LINUX1 is an 8 GB MLC MicroSD card with bootable
Linux, standard temperature

Table 9. J4 MicroSD Pinout

Network Interface

Ethernet Interface (J5)

The table below lists the pinout of the Ethernet connector.

Table 10. J5 Ethernet RJ45 Pinout

J5 RJ45 Pin

Wire-Color

10/100/1000

20 Tetra (VL-EPC-2700) Reference Manual

Interfaces and Connectors

Pin

Signal

Direction

Description

1

HDMI_D2_P

Out

HDMI Data 2 Differential Pair +

2

DATA2SHIELD

--

Ground

3

HDMI_D2_N

Out

HDMI Data 2 Differential Pair -

4

HDMI_D1_P

Out

HDMI Data 1 Differential Pair +

5

DATA1SHIELD

--

Ground

6

HDMI_D1_N

Out

HDMI Data 1 Differential Pair -

7

HDMI_D0_P

Out

HDMI Data 0 Differential Pair +

8

DATA2SHIELD

--

Ground

9

HDMI_D0_N

Out

HDMI Data 0 Differential Pair -

10

CLK_HDMI_P

Out

HDMI Clock Differential Pair +

11

DATA2SHIELD

--

Ground

12

CLK_HDMI_N

Out

HDMI Clock Differential Pair -

13

HDMI_CEC_CON

I/O

HDMI CEC Line

14

HDMI_NC_CON

N/A

No Connect - Resistor to GND option

15

HDMI_SCL_CON_R

Out

DDC Serial Clock Line (5V signal)

16

17

HDMI_CEC_GND

I/O

CEC_GND - 0 Ohm Resistor to GND

18

V5_HDMI_CON

Out

5V HDMI Cable Power

19

HDMI_HPD_CON

In

HDMI Hot Plug Detection Signal

Pin

Signal

Direction

Description

1

2

3

4

5

6

7

8

9

10

11

Video Interfaces

HDMI (J6)

Table 11. HDMI Connector Pinout

HDMI_SDA_CON_R I/O DDC Serial Data Line (5V signal)

LVDS (J7)

Table 12. LVDS Connector Pinout

GND -- Signal Ground

GND -- Signal Ground

LVDS_TX3_P Output LVDS Data 3 (positive)

LVDS_TX3_N Output LVDS Data 3 (negative)

GND -- Signal Ground

CLK_LVDS_P Output LVDS Clock (positive)

CLK_LVDS_N Output LVDS Clock (negative)

GND -- Signal Ground

LVDS_TX2_P Output LVDS Data 2 (positive)

LVDS_TX2_N Output LVDS Data 2 (negative)

GND -- Signal Ground

Tetra (VL-EPC-2700) Reference Manual 21

Pin

Signal

Direction

Description

12

LVDS_TX1_P Output LVDS Data 1 (positive)

13

14

15

16

17

18

19

20

Pin

Signal

Our Product

Description

4

V_LVDS_BKLGT

Input

Voltage for LVDS Backlight control

LVDS_TX1_N Output LVDS Data 1 (negative)

GND -- Signal Ground

LVDS_TX0_P Output LVDS Data 0 (positive)

LVDS_TX0_N Output LVDS Data 0 (negative)

GND -- Power Ground

GND -- Power Ground

V3P3_LVDS_PANEL Output LVDS Panel Power (+3.3V)

V3P3_LVDS_PANEL Output LVDS Panel Power (+3.3V)

LVDS Backlight (J8)

Table 13. LVDS Backlight Connector Pinout

Direction Relative to

Interfaces and Connectors

1 LVDS_BKLT_EN Output Backlight Enable for LVDS panel

2 GND -- Ground

3 LVDS_BLKT_CTRL Output Backlight Control for LVDS panel (PWM)

22 Tetra (VL-EPC-2700) Reference Manual

Interfaces and Connectors

Pin

Signal

Description

T1

V5_USB0_OTG

Top Connector Switched USB +5V Power

T2

USB0_OTG_N

USB OTG DN diff pair - (Via SoC)

T3

USB0_OTG_P

USB OTG DP diff pair + (Via SoC)

T4

GND

Top Connector Ground

Bottom Connector Switched USB +5V
Power

Pin

Signal

Description

Pin

Signal

Description

1

3.3V Active Low Reset
Output

2

3

3.3V Active Low Interrupt
Input

4

5

3.3V Slave Select #2 for Bus
CSPI3 (active low)

6

3.3V Slave Select #1 for Bus
CSPI3 (active low)

7

3.3V Slave Select #0 for Bus
CSPI3 (active low)

8

9

3.3V Master Out/Slave In for
Bus CSPI3

10

11

3.3V Master In/Slave Out for
Bus CSPI3

12

13

14

15

16

17

18

19

20

21

22

23

24

3.3V UART3 Receive Data
Input

25

26

3.3V UART3 Transmit Data
Output

I/O Interfaces

USB Interfaces (J1)

Table 14. USBx2 2.0 Connector Pinout

TM1 V5_USB1_H1

TM2 USB1_HUB1_N USB Host1 DN diff pair - (Via USB Hub)

TM3 USB1_HUB1_P USB Host1 DP diff pair + (Via USB Hub)

TM4 GND Bottom Connector Ground

Serial I/O (J12)

Table 15. Serial I/O Pinouts

OFFBRD_RST#

GP_IRQ#

CSPI3_SS2#

CSPI3_SS0#

CSPI3_MOSI

CSPI3_MISO

CLK_CSPI3 3.3V Clock for Bus CSPI3

V3P3 3.3V Power for I/O devices

GND Ground (I2C2)

GND Ground

GND Ground (I2C1)

GND Ground

GND Ground (OFFBRD_RST#)

GND Ground (GP_IRQ#)

CSPI3_SS1#

GND Ground (CSPI3)

GND Ground (CSPI3)

GND Ground (CSPI3)

GND Ground (V3P3)

I2C2_SDA 3.3V Data for Bus I2C2

CLK_I2C2_SCL 3.3V Clock for Bus I2C2

I2C1_SDA 3.3V Data for Bus I2C1

CLK_I2C1_SCL 3.3V Clock for Bus I2C1

UART3_RXD

GND Ground (UART3)

Tetra (VL-EPC-2700) Reference Manual 23

UART3_TXD

User I/O (J13)

Pin

Signal

Description

Pin

Signal

Description

Audio Left Line Input (Stereo
Left Input)

Audio Right Line Input (Stereo
Right Input)

Audio Left Line Output (Stereo
Left Output)

Audio Right Line Output
(Stereo Right Output)

Open-Drain Push Button
Control Power Input

Open-Drain Push Button
Control Reset Input

Open-Drain 3.3V max
Programmable LED driver

3.3V power for Programmable
LED

Open-Drain 3.3V max Ethernet
LED driver

Table 16. User I/O Pinouts

Interfaces and Connectors

1 AUD_LIN

3 GND_AUD Analog Audio Ground

5 AUD_ROUT

7 PB_CTL_PWR#

9 PB_CTL_RST#

11 PLED#

13 LED_ETH_GRN#

15 WDOG1# Watch dog 1 Output

17 GPIO1 3.3V General Purpose I/O

19 GND Ground

21 GPIO4 3.3V General Purpose I/O

23 GPIO5 3.3V General Purpose I/O

25 GND Ground

27 GPIO8 3.3V General Purpose I/O

29 V_BATT Battery Input (3.0V Coin Cell)

2 AUD_RIN

4 AUD_LOUT

6 GND_AUD Analog Audio Ground

8 GND Ground (for PB_CTL_PWR#)

10 GND Ground (for PB_CTL_RST#)

12 V3P3

14 V3P3 3.3V power for Ethernet LED

16 GND Ground

18 GPIO2 3.3V General Purpose I/O

20 GPIO3 3.3V General Purpose I/O

22 GND Ground

24 GPIO6 3.3V General Purpose I/O

26 GPIO7 3.3V General Purpose I/O

28 GND Ground

Tied to GND on CPU board and

30 RETURN_BATT/GND

direct to the battery minus
terminal on a paddleboard or
external battery connector.

31 GND Ground

33 V_MAIN

V_MAIN power. Voltage can be
8V to 17V (default 12V).

32 GND Ground

34 V_MAIN

V_MAIN power. Voltage can be
8V to 17V (default 12V).

24 Tetra (VL-EPC-2700) Reference Manual

Interfaces and Connectors

Pin Signal

Description

2

3

4

Pin

Signal

Description

Pin

Signal

Description

Audio (J10)

Table 17. Audio Jack Pinout

1

AUD_FIL_MIC_IN Microphone input from sleeve in jack

AUD_FIL_HP_LOUT Headphone output, stereo left

AUD_FIL_HP_ROUT Headphone output, stereo right

GND_AUD Audio Ground

CAN Interface (J17, J18)

Table 18. CAN Pinouts

x = 1 for J17
x = 2 for J18

1 CANx_P CANH signal for CAN bus

2 CANx_N CANL signal for CAN bus

3 GND Ground

4 V5 5V power (for off-board use)

COM1 Interface (J16)

Table 19. COM1 Pinout

Tetra (VL-EPC-2700) Reference Manual 25

1 COM1_RTS COM1 RS-232 Request to Send

2 COM1_TXD# COM1 RS-232 Transmit Data (active low)

3 COM1_CTS COM1 RS-232 Clear to Send

4 COM1_RXD# COM1 RS-232 Receive Data (active low)

5 GND Ground

Low Cost Camera Interface (J9)

The 15-pin input connector is ideal for using low cost MIPI CSI-2, Raspberry Pi* compatible
cameras. The input channel is limited to 8M pixel images and 1080p30 or 720p60 video. For
higher performance imaging, use cameras that connect to Tetra’s USB 2.0 or Ethernet input
channels.

Table 20. Camera Pinouts

Pin

Signal

Description

GND

Ground

CSI_D0_N

MIPI CSI-2 Data Lane 0 (negative diff pair)

CSI_D0_P

MIPI CSI-2 Data Lane 0 (positive diff pair)

GND

Ground

CSI_D1_N

MIPI CSI-2 Data Lane 1 (negative diff pair)

CSI_D1_P

MIPI CSI-2 Data Lane 1 (positive diff pair)

GND

Ground

CLK_CSI_N

MIPI CSI-2 Clock (negative diff pair)

CLK_CSI_P

MIPI CSI-2 Clock (positive diff pair)

GND

Ground

Designator

Signal Name

Description

PB_CTL_RST#

PB_CTL_PWR#

1

2

3

4

5

6

7

8

9

10

11 CSI_GPIO0

12 CSI_GPIO1

13 CLK_I2C3_SCL I2C Interface Serial Clock

14 I2C3_SDA I2C Interface Serial Data

15 V_CSI_VDD 3.3V Power for Camera Module

3.3V General Purpose I/O (function depends
on camera)

3.3V General Purpose I/O (function depends
on camera)

Interfaces and Connectors

Power Button

Table 21. Power Buttons and Designator

Reference

S1

S2

Note: The power pushbutton is level sensitive by default, holding the pushbutton in or driving the
signal low (using open-drain driver) from the User I/O connector pin is the only way to turn off the
power to the processor and I/O when the board input power is still being applied.

Push Button Control for Power-On Reset

Push Button Control for PMIC Power Outputs

26 Tetra (VL-EPC-2700) Reference Manual

5

Appendix A – References

• Yocto Linux User Guide for the VL-EPC-2700

• i.MX 6Dual/6 Quad Applications Processors for Industrial Products Datasheet

• Hardware Development Guide for i.MX 6 Families of Application Processors

• i.MX 6Dual/6Quad Applications Processor Reference Manual

• Chip Errata for the i.MX 6Dual/6Quad and i.MX 6DualPlus/6QuadPlus

Tetra (VL-EPC-2700 Reference Manual 27

KNOWN ISSUES

Hardware

 Currently the VersaLogic PCIe card VL-MPEe-U2 does not work with the Tetra board
 i.MX 6 SW controlled power-off is unsupported. In order to turn off the PMIC power output while

the power input to the board is still supplied, you must either hold the S2 power pushbutton in or
drive the PB_CTL_PWR# signal on the User IO connector (J13) low (with an open-drain driver)
since the input is level sensitive by default.

 To get the U2 working on the EPC-2700, the Kernel config has to have PCI Messaging Signal

Interrupts disabled (CONFIG_PCI_MSI=n). When disabled, the U2 serial ports work in both RS232
or RS422/485 and the MPIOs also work.

28 Tetra (VL-EPC-2700) Reference Manual