Seco Sbc-c20 User manual

SBC-C20

Single Board Computer

with NXP i.MX 8M Applications Processors

SBC-C20

Unauthorized use, duplication, modification or disclosure of the information to a third-party by any means without prior consent of SECO S.p.A. is prohibited.

Every effort has been made to ensure the accuracy of this manual. However, SECO S.p.A. accepts no responsibility for any inaccuracies, errors or omissions herein.

SECO S.p.A. reserves the right to change precise specifications without prior notice to supply the best product possible.

For further information on this module or other SECO products, but also to get the required assistance for any and possible issues, please contact us using the

dedicated web form available at http://www.seco.com (registration required).

Our team is ready to assist.

Revision

Date

Note

Ref

1.0

27th January 2020

First Official Release.

REVISION HISTORY

 
 SBC-C20 
SBC-C20 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: S.B./ A.R. - Reviewed by C.M. -Copyright © 2020 SECO S.p.A. 
3 
INDEX 
 INTRODUCTION.................................................................................................................................................................................5 
1.1 Warranty........................................................................................................................................................................................................................................6 
1.2 Information and assistance............................................................................................................................................................................................................. 7 
1.3 RMA number request.....................................................................................................................................................................................................................7 
1.4 Safety............................................................................................................................................................................................................................................ 8 
1.5 Electrostatic discharges ................................................................................................................................................................................................................. 8 
1.6 RoHS compliance..........................................................................................................................................................................................................................8 
1.7 Terminology and definitions ............................................................................................................................................................................................................9 
1.8 Reference specifications .............................................................................................................................................................................................................. 11 
 OVERVIEW.......................................................................................................................................................................................12 
2.1 Introduction.................................................................................................................................................................................................................................. 13 
2.2 Technical specifications ............................................................................................................................................................................................................... 14 
2.3 Electrical specifications ................................................................................................................................................................................................................ 15 
 RTC Battery.........................................................................................................................................................................................................................15 
 Power rails...........................................................................................................................................................................................................................15 
2.4 Mechanical specifications.............................................................................................................................................................................................................17 
2.5 Block diagram..............................................................................................................................................................................................................................18 
 CONNECTORS................................................................................................................................................................................19 
3.1 Introduction.................................................................................................................................................................................................................................. 20 
3.2 Connectors overview ...................................................................................................................................................................................................................21 
 Jumper List..........................................................................................................................................................................................................................21 
3.3 Connectors description................................................................................................................................................................................................................22 
 JTAG Connector..................................................................................................................................................................................................................22 
 Ethernet Connector..............................................................................................................................................................................................................22 
 LED Driver connector...........................................................................................................................................................................................................23 
 I2C Touch Screen connector ...............................................................................................................................................................................................23 
 LVDS + backlight connector.................................................................................................................................................................................................24 
 HDMI connector...................................................................................................................................................................................................................25 
 eDP Connector....................................................................................................................................................................................................................26 
 USB ports............................................................................................................................................................................................................................ 27 

 
 SBC-C20 
SBC-C20 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: S.B./ A.R. - Reviewed by C.M. -Copyright © 2020 SECO S.p.A. 
4 
 Internal USB header.............................................................................................................................................................................................................28 
 M.2 Socket 2 Key B Slot......................................................................................................................................................................................................29 
 microSIM Card Slot..............................................................................................................................................................................................................30 
 CSI Camera Connector........................................................................................................................................................................................................31 
 μSD card slot ......................................................................................................................................................................................................................32 
 Audio connectors.................................................................................................................................................................................................................33 
 Dual Analog Mic in Connector ..............................................................................................................................................................................................34 
 Optional 10W Amplified Speaker Out Connector...................................................................................................................................................................34 
 Digital Mic In connector........................................................................................................................................................................................................34 
 GPIO connector...................................................................................................................................................................................................................35 
 SPI Connector.....................................................................................................................................................................................................................35 
 CAN Bus connector.............................................................................................................................................................................................................36 
 Debug UART Connector ......................................................................................................................................................................................................36 
 RS-232 Connector ..............................................................................................................................................................................................................37 
 LCD / Backlight Power Selection..........................................................................................................................................................................................37 
 Power On/Off connector......................................................................................................................................................................................................38 
 APPENDICES...................................................................................................................................................................................39 
4.1 Thermal Design............................................................................................................................................................................................................................40 
 
 

SBC-C20

•Warranty

•Information and assistance

•RMA number request

•Safety

•Electrostatic discharges

•RoHS compliance

•Terminology and definitions

•Reference specifications

SBC-C20

1.1 Warranty

This product is subject to the Italian Law Decree 24/2002, acting European Directive 1999/44/CE on matters of sale and warranties to consumers.

The warranty on this product lasts for 1 year.

Under the warranty period, the Supplier guarantees the buyer assistance and service for repairing, replacing or credit of the item, at the Supplier’s own discretion.

Shipping costs that apply to non-conforming items or items that need replacement are to be paid by the customer.

Items cannot be returned unless previously authorized by the supplier.

The authorization is released after completing the specific form available on the web-site https://www.seco.com/it/support/online-rma.html (RMA Online). The RMA

authorization number must be put both on the packaging and on the documents shipped with the items, which must include all the accessories in their original

packaging, with no signs of damage to, or tampering with, any returned item.

The error analysis form identifying the fault type must be completed by the customer and has must accompany the returned item.

If any of the above-mentioned requirements for RMA is not satisfied, the item will be shipped back and the customer will have to pay any and all shipping costs.

Following a technical analysis, the supplier will verify if all the requirements, for which a warranty service applies, are met. If the warranty cannot be applied, the

Supplier will calculate the minimum cost of this initial analysis on the item and the repair costs. Costs for replaced components will be calculated separately.

Warning!

All changes or modifications to the equipment not explicitly approved by SECO S.p.A. could impair the equipment’s functionalities and could

void the warranty

SBC-C20

1.2 Information and assistance

What do I have to do if the product is faulty?

SECO S.p.A. offers the following services:

•SECO website: visit http://www.seco.com to receive the latest information on the product. In most of the cases it is possible to find useful information to

solve the problem.

•SECO Sales Representative: the Sales Rep can help to determine the exact cause of the problem and search for the best solution.

•SECO Help-Desk: contact SECO Technical Assistance. A technician is at disposal to understand the exact origin of the problem and suggest the correct

solution. E-mail: technical.se[email protected]

Fax (+39) 0575 350210

•Repair center: it is possible to send the faulty product to the SECO Repair Centre. In this case, follow this procedure:

oReturned items must be accompanied by an RMA Number. Items sent without the RMA number will be not accepted.

oReturned items must be shipped in an appropriate package. SECO is not responsible for damages caused by accidental drop, improper usage, or

customer neglect.

Note: Please have the following information before asking for technical assistance:

•Name and serial number of the product;

•Description of Customer’s peripheral connections;

•Description of Customer’s software (operative system, version, application software, etc.);

•A complete description of the problem;

•The exact words of every kind of error message encountered.

1.3 RMA number request

To request an RMA number, please visit SECO’s web-site. On the home page, please select “Online RMA”and follow the procedure described.

An RMA Number will be sent within 1 working day (only for on-line RMA requests).

SBC-C20

1.4 Safety

The SBC-C20 board uses only extremely-low voltages.

While handling the board, please use extreme caution to avoid any kind of risk or damages to electronic components.

1.5 Electrostatic discharges

The SBC-C20 board, like any other electronic product, is an electrostatic sensitive device: high voltages caused by static electricity could damage some or all the

devices and/or components on-board.

1.6 RoHS compliance

The SBC-C20 board is designed using RoHS compliant components and is manufactured on a lead-free production line. It is therefore fully RoHS compliant.

Always switch the power off, and unplug the power supply unit, before handling the board and/or connecting cables or other boards.

Avoid using metallic components - like paper clips, screws and similar - near the board when connected to a power supply, to avoid

short circuits due to unwanted contacts with other board components.

If the board has become wet, never connect it to any external power supply unit or battery.

Check carefully that all cables are correctly connected and that they are not damaged.

Whenever handling an SBC-C20 board, ground yourself through an anti-static wrist strap. Placement of the board on an anti-static

surface is also highly recommended.

SBC-C20

1.7 Terminology and definitions

API Application Program Interface, a set of commands and functions that can be used by programmers for writing software for specific Operating

Systems

CAN Bus Controller Area network, a protocol designed for in-vehicle communication

DDR Double Data Rate, a typology of memory devices which transfer data both on the rising and on the falling edge of the clock

DDR3L DDR, 3rd generation, Low Voltage

eDP embedded Display Port

GbE Gigabit Ethernet

Gbps Gigabits per second

GND Ground

GPI/O General purpose Input/Output

GPU Graphics Processing Unit

I2C Bus Inter-Integrated Circuit Bus, a simple serial bus consisting only of data and clock line, with multi-master capability

LVDS Low Voltage Differential Signaling, a standard for transferring data at very high speed using inexpensive twisted pairs copper cables, usually used

for video applications

MAC Medium Access Controller, the hardware implementing the Data Link Layer of ISO/OSI-7 model for communication systems

Mbps Megabits per second

MMC/eMMC MultiMedia Card / embedded MMC, a type of memory card, having the same interface of SD. The eMMC are the embedded version of the MMC.

They are devices that incorporate both the memory controller and the flash memories on a single BGA chip

N.A. Not Applicable

N.C. Not Connected

OpenGL Open Graphics Library, an Open Source API dedicated to 2D and 3D graphics

OpenVG Open Vector Graphics, an Open Source API dedicated to hardware accelerated 2D vector graphics

OS Operating System

OTG On-the-Go, a specification that allows to USB devices to act indifferently as Host or as a Client, depending on the device connected to the port

PHY Abbreviation of Physical, it is the device implementing the Physical Layer of ISO/OSI-7 model for communication systems

PSU Power Supply Unit

PWM Pulse Width Modulation

PWR Power

SBC-C20

RGMII Reduced Gigabit Media Independent Interface, a particular interface defining the communication between an Ethernet MAC and a PHY

SD Secure Digital, a memory card type

SM Bus System Management Bus, a subset of the I2C bus dedicated to communication with devices for system management, like a smart battery and

other power supply-related devices

SPI Serial Peripheral Interface, a 4-Wire synchronous full-duplex serial interface which contemplates a master and one or more slaves, individually

enabled through a Chip Select line

TBM To be measured

TTL Transistor-transistor Logic

USB Universal Serial Bus

uSDHC Ultra Secure Digital Host Controller

V_REF Voltage reference Pin

SBC-C20

1.8 Reference specifications

Here below it is a list of applicable industry specifications and reference documents.

Reference

Link

ACPI

https://uefi.org/specifications

CAN Bus

http://esd.cs.ucr.edu/webres/can20.pdf

Gigabit Ethernet

https://standards.ieee.org/standard/802_3-2018.html

I2C

https://www.nxp.com/docs/en/user-guide/UM10204.pdf

LVDS

http://www.ti.com/ww/en/analog/interface/lvds.shtml

http://www.ti.com/lit/ug/snla187/snla187.pdf

M.2 Specifications

https://pcisig.com/specifications/pciexpress/M.2_Specification/

MMC/eMMC

https://www.jedec.org/committees/jc-64

OpenGL

http://www.opengl.org

OpenVG

http://www.khronos.org/openvg

PCI Express

http://www.pcisig.com/specifications/pciexpress

SD Card Association

https://www.sdcard.org

SM Bus

http://www.smbus.org/specs

USB 2.0 and USB OTG

https://www.usb.org/sites/default/files/usb_20_20190524.zip

NXP i.MX 8M processor

https://www.nxp.com/products/processors-and-microcontrollers/arm-processors/i.mx-applications-processors/i.mx-8-

processors/i.mx-8m-family-armcortex-a53-cortex-m4-audio-voice-video:i.MX8M

SBC-C20

•Introduction

•Technical specifications

•Electrical specifications

•Mechanical specifications

•Block diagram

SBC-C20

2.1 Introduction

SBC-C20 is a Single Board Computer, measuring just 101.6 x 147 mm (4”x 5,78”) based on embedded NXP i.MX 8M Family, featuring multicore processing (Dual

or Quad ARM Cortex®-A53 cores + general purpose Cortex®-M4 processor).

Graphics features of the board are managed directly by NXP i.MX8M processor, which integrate a Vivante GC7000Lite GPU, supporting OpenGL®ES 1.1 / 2.0 /

3.0 / 3.1, Open CL 1.2 and Vulkan.

The board is completed with up to 2GB DDR3L directly soldered on board, and one eMMC Flash Drive, directly accessible like any standard Drive, with up to 32GB

of capacity. Mass storage capabilities are completed by a microSD Card slot.

The processor offers an RGMII interface which, through a dedicated Ethernet Transceiver, allows the implementation of a Gigabit Ethernet interface.

The communication / networking capabilities of the board are completed by an M.2 Key B Slot, which allows plugging M.2 Modem modules with USB or PCI-e

interface and by an optional WiFi ac/a/b/g/n + BT 5.0 combo embedded module.

The M.2 Key B Slot and the embedded modem can rely on an on-board microSIM slot.

The SBC-C20 offers an USB 3.0 Standard Type-A connector (related USB 2.0 interface is also shared on a micro-AB connector), two USB 2.0 standard Type-A

connectors and an internal USB 2.0 header (this connector shares one of the two USB 2.0 interfaces available on the dual type-A connector).

The audio functionalities of this board are realised by an I2S audio codec, which manages Speaker + microphone + earphone interfaces on an internal pin header,

and Line out and Mic In interfaces on a combo TRRS audio jack. An optional 10W per channel audio amplifier is also optionally available.

Please refer to following chapter for a complete list of all peripherals integrated and characteristics. Not all combinations of these features are offered simultaneously;

please visit SECO’s website for a description of standard configuration modules offered. Configurations different from the standard offered must be evaluated

singularly; please contact a SECO’s sales representative / distributor for this.

SBC-C20

2.2 Technical specifications

Processors

NXP i.MX 8M Family of processors, based on ARM®Cortex®-A53 MPCore +

Cortex-M4 core platform:

i.MX 8M Quad, Quad A53-core up to 1.5GHz, with GPU and VPU

i.MX 8M QuadLite, Quad A53-core up to 1.5GHz, with GPU only

i.MX 8M Dual, Dual A53-core up to 1.5GHz, with GPU and VPU

Memory

32-bit soldered down DDR3L memory, up to 2GB

Graphics

Vivante GC7000Lite GPU supporting OpenGL ES 1.1 / 2.0 / 3.0 / 3.1, Open CL

1.2 and Vulkan

Dedicated VPU (not for QuadLite), supporting 4Kp60 HEVC/H.265 main and main

10 decoder, 4Kp60 VP9 decoder, 4Kp30 AVC/H.264 decoder, 1080p60

MPEG-2, MPEG-4p2, VC-1, VP8, RV9, AVS, MJPEG, H.263 decoder

Dual Display support

Video Interfaces

embedded Display Port 1.4 connector (optionally switched with HDMI)

Optional LVDS interface

Optional HDMI 1.4 / 2.0a interface (switched with eDP)

4-lane MIPI_CSI Camera interface

Video Resolution

HDMI, eDP: up to 4096x2160

LVDS: up to 1920x1080

Mass Storage

microSD card slot

Optional eMMC drive on-board, up to 32GB

Networking

1x Gigabit Ethernet port

Optional WiFi (802.11 ac / a / b / g / n) +BT 5.0 module + antenna on-board

M.2 Socket 2 Key B 2260/3042 Slot for WWAN modules

microSIM slot soldered on-board for the Modem

USB

Up to 2 x USB 2.0 Type-A sockets

Optional USB 2.0 internal connector (excludes one type-A socket)

USB Device on USB 2.0 micro-AB connector (interface shared with USB 3.0 port)

USB 3.0 Type-A connector (interface shared with USB 2.0 micro-AB)

Audio

I2S Audio Codec

Speaker + Microphone + Earphone interfaces on internal pin headers

Line Out + Mic In combo TRRS audio jack

Optional Speaker connector, 10W per channel amplified

Serial Ports

RS-232 Serial port connector

Debug UART on internal pin header

CAN Port

Other interfaces

microSIM slot for M.2 modems

SPI interface

I2C Touch Screen dedicated connector

8 x GPI/Os connector

Power supply voltage:

+12VDC

Operating temperature**: 0°C ÷ +60°C (commercial version)

-40°C ÷ +85°C (industrial version, only boards without optional WiFi module)

Dimensions: 101.6 x 147 mm (4”x 5.78”).

Supported Operating Systems:

Linux

Android

** Measured at any point of SECO standard heatspreader for this product,

during any and all times (including start-up). Actual temperature will widely

depend on application, enclosure and/or environment. Upon customer to

consider application-specific cooling solutions for the final system to keep the

heatspreader temperature in the range indicated.

Please also check paragraph 4.1

SBC-C20

2.3 Electrical specifications

SBC-C20 needs to be supplied only with an external 12VDC ± 10% power supply, with a minimal 20W power rating (SBC-C20 power consumption

by itself is around 5W, more power is required for the possible attached devices).

This voltage can be supplied through a Right-angle connector type Molex Mini-Fit Jr, p/n 39-30-0040 or equivalent, with the pinout indicated in the

table below.

RTC Battery

The SBC-C20 board can be equipped with an optional low-power Real Time Clock embedded on the module (which is a NXP PCF2123).

If the board is not equipped with the optional rechargeable battery, then it will be available a soldered horizontal 3V coin cell lithium battery to supply the RTC.

The battery used is a not-rechargeable CR1225 Lithium coin-cell battery, with a nominal capacity of 48mAh.

In case of exhaustion, the battery should only be replaced with devices of the same type. Always check the orientation before inserting and make sure that they are

aligned correctly and are not damaged or leaking.

Never allow the batteries to become short-circuited during handling.

Batteries supplied with SBC-C20 are compliant to requirements of European Directive 2006/66/EC regarding batteries and accumulators. When putting out of order

SBC-C20, remove the batteries from the board in order to collect and dispose them according to the requirement of the same European Directive above mentioned.

Even when replacing the batteries, the disposal has to be made according to these requirements.

Power rails

In all the tables contained in this manual, Power rails are named with the following meaning:

VIN_SYS: +12VDC voltage directly coming from the Power Supply connectors CN1

+3P3V_ALW: +3.3V Always voltage, derived from VIN_SYS voltage

Power In Connector CN1

Signal

GND

VIN_SYS

GND

VIN_SYS

CAUTION: handling batteries incorrectly or replacing with not-approved devices may present a risk of fire or explosion.

SBC-C20

+5V_ALW: +5V Always voltage, derived from VIN_SYS voltage

VRTC: +3V external voltage for supplying the RTC clock

VDD_3P3V: +3.3V switched voltage directly derived from +3P3V_ALW

VDD_5V: +5V switched voltage directly derived from +5V_ALW

SBC-C20

2.4 Mechanical specifications

Board dimensions are 101.6 x 147 mm (4”x 5.78”).

The printed circuit of the board is made of ten layers, some of them are ground planes, for disturbance rejection.

2.5 Block diagram

i.MX 8M

Application

processor

+12V

LED Driver

LVDS connector

CAN

DSI-to-LVDS

bridge

CAN Controller +

Transceiver

Optional USB 2.0

internal header

COM port

connector

RS-232

transceiver

eDP connector

GbEthernet

transceiver

JTAG Connector

eMMC

GPIO Connector

HDMI connector

Debug

Connector

Power IN

Connector

Power section

USB to SDIO

bridge

Debug UART

JTAG

USB_SS_1

USB_1

UART_4

SPI #2

UART_1

I2S_3

MIPI_DSI_0/_1

LVDS_PWM_0

2 x Antenna

WiFi

802.11a/b/g/n +

BT LE module

Power ON

Connector +

Button

USB2514 USB 2.0

Hub

USB_2

Combo TRRS

Internal audio

connectors

Speaker

connector

I2S Audio Codec

Audio Amplifier

MIPI_CSI + GPIO + I2C_2

PMIC

I2C_4

I2S_4

I2C_3

RGMII

QSPI

USB micro-AB

connector

QSPI Flash

Backlight

connector

DDR3L soldered-

down memory

DDR3L soldered-

down memory

µSD Card Slot

External SPI

Ultra-Low Power

RTC

SDIO_2

M.2 Key B Slot

USB DS #1

USB DS #3

USB DS 4

UIM Slot

SDIO_1

PCI-e #1

I2C_1

RJ-45 GbEthernet

connector

Camera

Connector

USB 3.0 Type-A

Connector

12-Channel

Mux/Demux

HDMI/eDP

USB 2.0 Switch

T/S Connector

USB 2.0 Dual

Type-A

connector

USB DS #2

RGMII

SBC-C20

•Introduction

•Connectors overview

•Connectors description

SBC-C20

3.1 Introduction

On SBC-C20 board, there are several connectors located on the upper plane. Standard connectors are placed on the same side of PCB, so that it is possible to

place them on a panel of an eventual enclosure.

Please be aware that, depending on the configuration purchased, the appearance of the board can be significantly different from the following pictures.

microSIM

Card Slot

JTAG

eDP USB

Recovery

LED Driver

BOTTOM SIDE

GPIO

CSI

Camera

USB 3.0

GbEthernet