VersaLogic Tetra VL-EPC-2700 Quick user guide

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
I
2
C

ii Tetra (VL-EPC-2700) Reference Manual
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.

Tetra (VL-EPC-2700) Reference Manual iii
Product Release Notes
Rev 1.00
Production release for the Rev 1.0 board
Rev 1.10
Added backup battery information
Rev 1.20
Updated the Block Diagram for clarity. Added PCI Messaging interrupt information
in the Known Issues section.
Rev 1.30
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 [email protected].
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 charges for UPS
Ground delivery to United States addresses.
Non-warranty Repair: All approved non-warranty repairs are subject to diagnosis and labor
charges, parts charges and return shipping fees. Specify the shipping method you prefer and provide a
purchase order number for invoicing the repair.
Note:Mark the RMA number clearly on the outside of the box before returning.

iv Tetra (VL-EPC-2700) Reference Manual
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

Tetra (VL-EPC-2700) Reference Manual v
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

vi Tetra (VL-EPC-2700) User’s Guide
Introduction
Description
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 on-
board 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.
Arm* i.MX6 quad-core processor
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
Mini PCIe or mSATA socket
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
I2C
Eight 3.3V GPIO and three PWM
outputs
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).
1

Introduction
Tetra (VL-EPC-2700) User’s Guide 7
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
Characteristic
Value
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

Introduction
8 Tetra (VL-EPC-2700) Reference Manual
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

Introduction
Tetra (VL-EPC-2700) User’s Guide 9
Block Diagram
Figure 2. Tetra Board Block Diagram
Serial InterfacesHeader (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
UserI/O Header
(CBR-3407)
DDR3L
SDRAM
DDR3LSoldered 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
Acc elerometer
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
Jump er
LVDS x1Channel (24-bit)
GPIO x2
MIPI CSI and GPIO x2
SATA
PCIe x1
I2C2
Res
Mux
Res
Mux
AUDIO5
GPIO
GPIO x8
GPIO
I2C3
RGMII
I2C1
I2C2 ECSPI3
CAN1
CAN2
UART1UART3
ECSPI1
V1
Jump er
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

Introduction
10 Tetra (VL-EPC-2700) Reference Manual
Cautions
Electrostatic Discharge
CAUTION:
Electrostatic discharge (ESD) can damage circuit boards, disk drives, and other
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
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.
Note: The exterior coating on some metallic antistatic bags is sufficiently conductive to cause excessive
battery drain if the bag is in contact with the bottom side of the Tetra.
Handling Care
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.
Earth Ground Requirement
CAUTION:
All mounting standoffs for EPC boards should be connected to earth ground (chassis
ground). This provides proper grounding for EMI purposes.

Tetra (VL-EPC-2700) User’s Guide 11
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.
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.
2

Configuration and Setup
12 Tetra (VL-EPC-2700) Reference Manual
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.)
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.

Configuration and Setup
Tetra (VL-EPC-2700) User’s Guide 13
External Connectors
Figure 4. Connector Locations (Top Side)

Configuration and Setup
14 Tetra (VL-EPC-2700) Reference Manual
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
Connector
(Note)
Function Mating Connector/Device
Transition
Cable
Cable/Device Description
J1 USB (dual
stacked)
Standard USB Type A — 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
mode (V2 jumper off).
J2
SATA
Standard SATA
VL-CBR-0701
VL-CBR-0702
Standard Cable
Latching Cable
J3
Minicard PCIe or
mSATA
MPEe/MPEu/MPEs
Minicards
—
Tetra model dependent (-02A:
mSATA or USB type Minicard, -
02B & -EVAL: MiniPCIe or USB
type Minicard)
J4
MicroSD
8GB microSD card with
bootable Linux
2GB microSD card
4GB microSD card
8GB microSD card
—
VL-F41-8SBNLINUX1 (Standard
Temperature)
VL-F41-2EBN
(ExtendedTemperature)
VL-F41-4EBN (Extended
Temperature)
VL-F41-8EBN (Extended
Temperature)
J5
Ethernet
RJ45 Crimp-on Plug
Cat5e Ethernet Patch Cable
J6
HDMI
Standard HDMI
—
—
J7
LDVS
Hirose DF19G-20P-1H(54)
VL-CBR-2015
VL-CBR-2016
VL-CBR-2017
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
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
positive center pin
AC/DC 12V - VL-PS-WALL12-24
J16 COM1
VL-CBR-0504
J17, J18 CAN
VL-CBR-0405
VL-CBR-0406
2 mm 4-pin to 2 mm 4-pin
MicroClasp, 1m
2 mm 4-pin MicroClasp to DB9
connector, 0.5m

Configuration and Setup
Tetra (VL-EPC-2700) User’s Guide 15
Table 3. Jumper Information
EPC-2700
Reference
Designator
EPC-2700
Signal Name
Control/Description
V1
BOOT_MODE0
BOOT_MODE0 setting, to allow use
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
jumper is removed.
V2
USB_OTG_ID
Install jumper to set USB_OTG port to
host mode. No jumper sets port to
Device Mode

16 Tetra (VL-EPC-2700) Reference Manual
System Features
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:
To prevent severe and possibly irreparable damage to the system, it is critical that the
power connectors are wired correctly. The power connector is not fuse or diode
protected. Proper polarity must be followed otherwise damage will occur.
Table 4. J15 Main Power Connector Pinout
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
Ground when no plug,
open otherwise.
Power Requirements
Model Idle Typical Max.
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
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.
CPU
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.
3

Tetra (VL-EPC-2700) User’s Guide 17
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
Pin
Signal Name
1
PU_BOOT_MODE0
2
BOOT_MODE0
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
Pin
Signal Name
1
USB_OTG_ID
2
GND
4

Interfaces and Connectors
18 Tetra (VL-EPC-2700) Reference Manual
Storage Interfaces
SATA Interface (J2)
The table below lists the pinout of the 7-pin SATA connector.
Table 7. J2 SATA Pinout
Pin
Signal
1
GND
2
SATA_TX_P
3
SATA_TX_N
4
GND
5
SATA_RX_N
6
SATA_RX_P
7
GND
Minicard Interface (J3)
The table below lists the pinout of the 52-pin Minicard connector.
Table 8. J3 Minicard Pinout
Pin
mSATA Signal
PCIe Minicard
Signal
Pin
mSATA Signal
PCIe Minicard
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

Interfaces and Connectors
Tetra (VL-EPC-2700) Reference Manual 19
Pin
mSATA Signal
PCIe Minicard
Signal
Pin
mSATA Signal
PCIe Minicard
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_WWAN#
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

Interfaces and Connectors
20 Tetra (VL-EPC-2700) Reference Manual
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
Pin
Signal
1
DAT2
2
CD/DAT3
3
CMD
4
VDD (+3.3V)
5
CLK
6
VSS (GND)
7
DAT0
8
DAT1
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
(CAT5E)
10/100 Signals
10/100/1000
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-