EMAC SoM-112ES User Manual

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2390 EMAC Way, Carbondale, Illinois 62902 Phone: (618) 529-4525 Fax: (618) 457-0110 http://www.emacinc.com

SoM-112ES

User Manual

July 2018

Revision 1.00

EMAC, Inc.

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SoM-112ES User Manual

Table of Contents

1 Introduction ........................................................................................................................................................... - 4 -

1.1 .... Features ............................................................................................................................................................................. - 4 -

2 Hardware ................................................................................................................................................................ - 5 -

2.1 .... Specifications .................................................................................................................................................................. - 5 -

2.2 .... Jumper Configuration & Connector Descriptions ............................................................................................. - 6 -

2.3 .... Power Connectors ......................................................................................................................................................... - 7 -

2.4 .... Ethernet ............................................................................................................................................................................. - 7 -

2.5 .... Serial Ports ....................................................................................................................................................................... - 7 -

2.6 .... USB ...................................................................................................................................................................................... - 9 -

2.7 .... CAN Port ............................................................................................................................................................................ - 9 -

2.8 .... MicroSD Card Socket .................................................................................................................................................... - 9 -

2.9 .... Audio ................................................................................................................................................................................. - 10 -

2.10 .. Wi-Fi [Optional] ............................................................................................................................................................ - 10 -

2.11 .. I/O Expansion ................................................................................................................................................................ - 10 -

2.12 .. Mikrobus Expansion ................................................................................................................................................... - 11 -

2.13 .. I2C ...................................................................................................................................................................................... - 11 -

2.14 .. SPI ...................................................................................................................................................................................... - 11 -

2.15 .. Status LEDs and Reset ............................................................................................................................................... - 11 -

2.16 .. Real-Time Clock ............................................................................................................................................................ - 12 -

3 Software ................................................................................................................................................................ - 12 -

3.1 .... Das U-Boot ..................................................................................................................................................................... - 12 -

3.2 .... Embedded Linux ........................................................................................................................................................... - 12 -

3.2.1 Linux with Xenomai Real Time Extensions .................................................................................................................. - 13 -

3.2.2 Linux Packages ...................................................................................................................................................................... - 13 -

3.2.3 Linux Patches ......................................................................................................................................................................... - 13 -

3.3 .... Qt Creator ....................................................................................................................................................................... - 13 -

3.4 .... ARM EABI Cross Compiler ........................................................................................................................................ - 13 -

4 Appendix A: Connector Pinouts .................................................................................................................... - 14 -

4.1 .... 4-Pin Molex Male Floppy Power Connector (CN1) ..................................................................................... - 14 -

4.2 .... 3-Pin Polarized Locking CAN Connector (CN2) ........................................................................................... - 14 -

4.3 .... Utility GPIO Header (HDR1) .................................................................................................................................. - 14 -

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SoM-112ES User Manual

4.4 .... RS-232 Serial Port COM A Header (HDR2)..................................................................................................... - 15 -

4.5 .... RS-232/422/485 Serial Port COM B Header (HDR3) ................................................................................ - 15 -

4.6 .... Audio Input Jack (JK1) ............................................................................................................................................. - 15 -

4.7 .... Audio Output Jack (JK2) .......................................................................................................................................... - 15 -

4.8 .... Serial Port COM C (JK3) ........................................................................................................................................... - 16 -

4.9 .... Micro USB B 2.0 Console Interface Connector (JK4) .................................................................................. - 16 -

4.10 .. USB Host Port B (JK5) .............................................................................................................................................. - 16 -

4.11 .. USB Host Port A1 & A2 (JK6) ................................................................................................................................ - 17 -

4.12 .. USB Device Port C (JK7) .......................................................................................................................................... - 17 -

4.13 .. Single Port Ethernet Connector (JK8)............................................................................................................... - 17 -

4.14 .. Vin Power Barrel Jack (JK10) ............................................................................................................................... - 18 -

4.15 .. MikroBUS Socket (SOK2) ........................................................................................................................................ - 18 -

4.16 .. Micro SD Card Socket (SOK3) ............................................................................................................................... - 18 -

5 Appendix B: Jumper Settings ................................................................................................................... - 19 -

5.1 .... JB1 (Boot0 Source Selection) ................................................................................................................................ - 19 -

5.2 .... JB2 (Boot1 Source Selection) ................................................................................................................................ - 19 -

5.3 .... JB3 (Flash Write Protect) ....................................................................................................................................... - 19 -

5.4 .... JB4 (Standby Battery) .............................................................................................................................................. - 19 -

5.5 .... JB5 (External SPI Interface Voltage) ................................................................................................................ - 19 -

5.6 .... JB6 (External I2C Interface Voltage) ................................................................................................................ - 19 -

5.7 .... JB7 (Serial Port RS-232 or RS-422/485) ......................................................................................................... - 20 -

5.8 .... JB8 (Serial Port RS-422 or RS-485) ................................................................................................................... - 20 -

5.9 .... JB9 (USB Device Port C Enable) ........................................................................................................................... - 20 -

6 Appendix C: Dimensional Drawing ...................................................................................................... - 21 -

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SoM-112ES User Manual

Disclaimer

EMAC Inc. does not assume any liability arising out of the application or use of any of its products or designs. Products designed or distributed by EMAC Inc. are not intended for, or authorized to be used in, applications such as life support systems or for any other use in which the failure of the product could potentially result in personal injury, death or property damage.

If EMAC Inc. products are used in any of the aforementioned unintended or unauthorized applications, Purchaser shall indemnify and hold EMAC Inc. and its employees and officers harmless against all claims, costs, damages, expenses, and attorney fees that may directly or indirectly arise out of any claim of personal injury, death or property damage associated with such unintended or unauthorized use, even if it is alleged that EMAC Inc. was negligent in the design or manufacture of the product.

EMAC Inc. reserves the right to make changes to any products with the intent to improve overall quality, without further notification.

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SoM-112ES User Manual

1 Introduction

This document provides information regarding EMAC’s SoM-112ES System-on-Module Carrier Board. The SoM-112ES is a compact, low-power SoM Carrier/Socket board with WiFi and Bluetooth connectivity onboard, and MikroBus expansion. This versatile SoM Carrier/Socket board is ideal for evaluation and early development work. This Carrier is designed to work with all EMAC 144-pin SODIMM type SoMs. Note: The SoM-112ES is specifically designed for SoMs with APM sleep capability and utilizes GPIO controllable IO to further reduce sleep current draws.

The SoM-112ES provides access to many of the SoM's I/O through on-board connectors as well as a number of additional I/O expansion blocks such as Wireless Networking, 10/100 BaseT Ethernet, MikroBUS modules, and HCSD/MMC flash disk.

When paired with the SOM-IMX6U, the SOM-112ES makes a relatively Low Power IoT connectivity solution, using a MikroBUS ZigBee Wireless module, the SOM-112ES can collect and route IoT sensors to the Cloud.

1.1 Features

 114 Pin SODIMM SoM Connector  2x serial RS232 ports, 1x USB to Serial Console, & 1x RS232/422/485 Port  3x USB Host ports & 1x USB Device Port  1x 10/100 BaseT Ethernet with onboard Magnetics and RJ45  Wifi/BT & CAN 2.0B Port  General SOM I/O: GPIOs, SPI, A/D, D/A, PWM, I²C, I²S  MikroBus Expansion  Barrel power jack  Standard Molex male floppy power connector for alternate power input  DB9 male for COM C  3x 10 pin header for serial ports  1x micro USB connector for serial console  1x dual USB Type A connector  1x single USB Type A connector  1x mini USB Device Type B connector  1x RJ45 Ethernet connector  1x Micro SD Card Socket  1x 3-pin polarized locking connector for CAN  1x dual row 50-pin .1” GPIO/Misc. Header connector  1x I²S audio with Line in & out jacks  Reset Button

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2 Hardware

2.1 Specifications

 Flash Disk: Micro SD Card Socket  System Reset: External Reset Button  RTC: Real-Time Clock with battery-backed provision  Multi I/O: (any mix of)

o Up to 8x General Purpose Digital Inputs o Up to 8x General Purpose Digital Outputs o Up to 8x 12-bit Digital-to-Analog Converter (DAC) o Up to 8-channel, 12-bit Analog-to-Digital Converter (ADC)

 Power: Barrel Jack or Standard 4-Pin Molex Male Connectors with 3.3 linear regulator

Serial Interfaces:

 UARTS: 4x Serial Ports (2xRS232, 1xRS232/422/485, 1x USB Device to Serial Console)  Audio: 1x I²S audio with Line in & out jacks  USB: 3x USB Host ports & 1x USB Device Port

Ethernet Interface:

 Type: 10/100 BaseT Ethernet with onboard Magnetics and RJ45  Interface: On-Board RJ-45 Connector

Bus Interface:

 SoM Bus: 144-Pin SODIMM SOM Module  Bus Expansion.: MikroBUS Expansion Socket (MikroBUS module Optional)

Mechanical and Environmental

 Dimensions: 3" W × 4 .75" L × 0.75" H (76mm × 120mm × 19mm)  Power Supply Voltage: +5 V power input

o Power Requirements (typical): 5 Volts @ ~500mA (2.5 watts)

 Operating Temperature: 0 to 70° C (32 ~158° F) [-40 to +85° C optional]  Operating Humidity: 0% ~ 90% relative humidity, non-condensing

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SoM-112ES User Manual

Label

Function

CN1

4-Pin Molex Male Floppy Power Connector

CN2

3-Pin Polarized Locking CAN Connector

HDR1

Utility GPIO Header

HDR2

RS-232 Serial Port COM A Header

HDR3

RS-232/422/485 Serial Port COM B Header

JK1

Audio Input Jack

JK2

Audio Output Jack

JK3

Serial Port COM E

JK4

Micro USB 2.0 Console Interface Connector

JK5

USB Host Port B

JK6

USB Host Port A1 & A2

JK7

USB Device Port C

JK8

Single Port Ethernet Connector

JK9

WiFi Antenna Connector

JK10

Vin Power Barrel Jack

SOK1

144 Pin SoM Socket

SOK2

MikroBUS Socket

SOK3

Micro SD Card Socket

Label

Function

Default

JB1

Boot0 Source Selection

Position A

JB2

Boot1 Source Selection

Position A

JB3

Flash Write Protect

Position A

JB4

Standby Battery

JB5

External SPI Interface Voltage

3.3V

JB6

External I2C Interface Voltage

3.3V

JB7

Serial Port RS-232 or RS-422/485

232

JB8

Serial Port RS-422 or RS-485

422

JB9

USB Device Port C Enable

Position B

2.2 Jumper Configuration & Connector Descriptions

The SoM-112ES is factory configured. In the event that jumpers need to be verified or modified this section provides the information required, including instructions on setting jumpers and connecting peripherals, switches and indicators. Be sure to read all the safety precautions before you begin any configuration procedure. See Appendix A for connector pinouts and Appendix B for Jumper Settings.

Table 1: Connectors

Table 2: Jumpers

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SoM-112ES User Manual

Signal

Pin 1

Pin 2

GND

Pin 3

GND

Pin 4

12V

RS-232 10-Pin Header: Description

NC 2 NC

COMA_RX232

COMA_TX232

NC 7 NC 8 NC

GND

2.3 Power Connectors

The SoM-112ES provides two power connectors. JK10 is a standard 5.5mm barrel jack with an inner diameter of 2.1mm with a center V+ connection and has an operating temperature of -25 ~ 85°C. This jack allows for an easy connection to a wall mount power supply (EMAC part number PER-PWR-00032). An alternative power connector is located at CN1 and is an On-Shore Technology locking power connector (part# 254B5V1040). This power input provides a more rugged/industrial locking connection with an operating temperature of -25 ~ 85°C.

Table 3: Pin-out for Power Connector (CN1)

2.4 Ethernet

The SoM-112ES provides one 10/100 Base-T full duplex Ethernet and uses a standard single port RJ-45 LAN jack (JK8) with integrated magnetics. It can be connected straight to a hub, or another computer via Ethernet crossover cable. The Ethernet crossover cable can be replaced with a patch cable if the SoM processor module supports the Auto MDI-X capability. The Ethernet MAC & PHY are integrated into the SoM processor module. Activity and Link LEDs are integrated into the RJ45 connector.

2.5 Serial Ports

The SoM-112ES is equipped with four serial ports, two that terminate to 10-pin header connectors (COM A & B), one of which terminates to a male DB9 connector (COM C), and one USB to Serial console port that terminates to a micro USB 2.0 B connector (COM E). COM D is dedicated to the Bluetooth Radio. Baud Rates, stop bits, etc. are all programmable for each port via software.

 Serial Port COM A is a RS232 port. This port offers RXD/TXD without handshaking lines

terminating to a 10-pin header.

Table 4: Serial Port COM A (HDR2)

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SoM-112ES User Manual

RS-232 10-Pin Header: Description

RS-422/485 10-Pin Header: Description

COMB_422/485_TX-

COMB_232RX

COMB_422/485_TX+

COMB_232_RTS

COMB_232TX

COMB_422/485_RX+

COMB_232_CTS

NC 7 NC

COMB_422/485_RX-

GND

DB9 Connector: Description

COMC_232_DCD

COMC_232_RXD

COMC_232_TXD

COMC_232_DTR

COMC_232_GND

COMC_232_DSR

COMC_232_RTS

COMC_232_CTS

COMC_232_RI

 Serial Port COM B terminates to a 10-Pin header and can be configured as RS232, RS422, or

RS485 via two jumpers (JB7 & JB8). To select RS232 set jumper JB7 to 232 (this is the default). For RS4xx set jumper JB7 to 4xx and jumper JB8 to 422 or 485 whichever is desired.

Table 5: Serial Port COM B (HDR3)

 Serial Port COM C terminates to a male DB9 connector and is a RS232 port with a full

complement of handshaking lines allowing it to communicate with modems and other devices requiring hardware flow control (Note actual number of handshake lines is determined be the SoM)

Table 6: Serial Port COM C (JK3)

 COM E is a serial console to USB device port terminating to a 5-Pin USB micro B connector. This

port offers USB to asynchronous serial date transfers and includes RTD/TXD lines. A Green activity light is provided for the console interface and located at LD2.

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SoM-112ES User Manual

Micro USB B 2.0 Connector: Description

PWR

DM (Data -)

DP (Data +)

GND

Signal

Pin 1

GND

Pin 2

CAN_L

Pin 3

CAN_H

Table 7: Serial Port COM E (JK4)

2.6 USB

The SoM-112ES provides for 1x dual USB 2.0 Type A host ports (USB PortA1 & A2), 1x single USB 2.0 Type A host port (USB Port B), and 1x single USB Type B device port (USB Port C). Ports A1 & A2 are provided via a USB Switch. USB HOST Port B and USB Device Port C are both provided directly from the SOM.

The USB host ports are fused with automatically resettable Polyfuses. If a USB device tries to draw more than 500 milliamps, the fuses will open. Once the drawing source is removed the fuses will automatically reset.

Note: When sizing a power supply, make sure to allow for USB Device consumption. A device can potentially draw 500mA, therefore these devices could use a total of up to 1.5 amp of power. USB ports must be supported by the SoM for the ports to operate.

A Micro USB Connector is provided as the system serial console (COM E). This makes it easier for modern day computers that are not equipped with a standard serial port to establish a console port connection.

2.7 CAN Port

The SoM-112ES provides a CAN 2.0 port utilizing the TI SN65HVD232 CAN Transceiver chip. Note, the CAN controller must be supported by the SOM in order to have CAN functionality. The CAN port is accessible via a 3-pin header (CN2).

Table 7: Pin-out for CAN 2.0 (CN2)

2.8 MicroSD Card Socket

The SoM-112ES provides a high capacity MicroSD socket. This socket is hot-swappable and can accept a wide variety of Flash Cards. The MicroSD card is serviced through a USB bridge device as the native SoM SDIO port is dedicated to the Wireless module. A Red activity LED (LD3) will be lit when the Flash card is accessed and the card should not be removed at this time. A card that is written to by the SoM-112ES

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SoM-112ES User Manual

Signal

3P3_VCC

GND

EXPIO_REF

EXPIO_0

EXPIO_1

EXPIO_2

EXPIO_3

can be read by another computer using a MicroSD card reader. The MicroSD interface is compatible with Standard and High Capacity MicroSD cards.

2.9 Audio

The SoM-112ES provides Audio Line Out and Line In capabilities through two standard audio jacks (JK1 & JK2). Audio Jack JK1 is a stereo line level input and Audio Jack JK2 is a stereo line or headphone level output. The processor interfaces to the Audio CODEC through its I²S interface. Volume and Balance are controlled through software using the I²C interface lines I2C_CLK_E & I2C_DAT_E, which are accessible via HDR1.

The CODEC is the NXP Semiconductors SGTL5000XNLA3, which is a flexible, low-power, 24-bit high performance stereo codec with integrated headphone amplifier. It features a capless headphone design and an internal PLL that allows inputs up to 27MHz.

2.10 Wi-Fi [Optional]

The SoM-112ES provides one Wi-Fi/Bluetooth antenna jack (JK9) which utilizes the on-board WiFi/Bluetooth Murata module (LBEE5KL1DX).

The antenna jack, (U.FL-R-SMT (10)) offers high frequency performance from DC to 6GHz, with a V.S.W.R of 1.3 to 1.5 max. EMAC provides an antenna kit: 2.4GHz Duck Antenna RP-SMA and U.FL.(IPEX) to RPSMA male pigtail cable that plugs into the SoM’s antenna jack. Alternatively, EMAC can provide a

2.4GHz IPEX MHF flat adhesive patch antenna.

WLAN/Bluetooth Features:

 2.4GHz functionality  802.11 b/g/n data rates  Interface: UART (COM D) for BT and SDIO (direct from SoM) for WLAN  IC/Firmware: Cypress/CYW4343W  Bluetooth 4.1 +EDR

2.11 I/O Expansion

The SoM-112ES provides access to a number of I/O lines on connector HDR1. The 50-pin dual row header contains GPIO lines, SPI bus, I2C bus, A/D lines, D/A lines, PWM, I2S, interrupts, and power pins. Signal names listed in the tables below are the SoM names as defined in the SoM 144 pin specification.

The SoM-112 is equipped with a Multi I/O chip (AD5593RBRUZ), that provides up to 8 digital input, 8 digital outputs, 8 Digital Analog Converter outputs and 8 Analog to Digital Converter inputs in any combination. The Multi I/O can be accessed through 8 pins (5 – 12) as listed below in Table 8.

Table 8: I/O Header (HDR1)

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SoM-112ES User Manual

EXPIO_4

EXPIO_5

EXPIO_6

EXPIO_7

GPIO_5/AD-1

GPIO_6/AD-2

GPIO_7/AD-3

GPIO_8/AD-4

GND

GPIO_9/MISO

GND

GPIO_10/MOSI

GND

GPIO_11/SCK

GND

GPIO_12/CS0n

GND

GPIO_13/CS1n

GND

SPI_EXT_MISO

GND

SPI_EXT_MOSI

GND

SPI_EXT_CLK

GND

SPI_EXT_CS1n

GND

SPI_EXT_CS2n

GND

I2C_CLK-E

GPIO_1/IRQ_1

I2C_DAT-E

GPIO_14/PWM1

SOM_RSTO#

GPIO_15/PWM2

5V_VCC

GND

2.12 Mikrobus Expansion

The SoM-112ES provides for a MikroBus Expansion Socket. This socket has two 8-pin female headers consisting of 3 groups of communication, 2 power groups, and 6 additional pins including PWM, Interrupt, Analog input, reset, and chip select. There are a large number of compatible MikroBUS addon boards available in the market today that allow the end user to add functionality to development boards. The MikroBUS module is optional and not included.

2.13 I2C

The SoM-112ES is equipped with two I2C hardware ports. One is routed to the MikroBus Expansion Socket (SOK2) and the other is located on the Utility GPIO Header (HDR1). A TI TXS0102D voltage translator is utilized on the I2C interface allowing a 5V or 3.3V selection via JB6 jumper.

2.14 SPI

The SoM-112ES comes equipped with two Serial Peripheral Interface buses. One is routed to the MikroBus Expansion Socket (SOK2) and the other is located on the Utility GPIO Header (HDR1). A TI TXB0106 Voltage Translator is utilized on the SPI interface allowing a 5V or 3.3V selection via JB5.

2.15 Status LEDs and Reset

The SoM-112ES provides a Reset Button located at PB1. Pressing this button will cause the system to reset. A green status LED is also provided and is located at LD1.

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SoM-112ES User Manual

2.16 Real-Time Clock

The SoM-112ES is equipped with an external battery (BH1) for backing up the module’s Real-Time Clock (RTC). Drivers to access the RTC are included in the operating systems. Jumper JB1 should be placed in the ON position in order to retain system time when powered down.

3 Software

The SoM-112ES offers a wide variety of software support from both open source and proprietary sources. Software Board Support Packages (BSPs) and Linux Software Development Kits (SDKs) are available for most SoM processor modules.

For more information on Linux Software Support, please visit the EMAC Wiki Software Section at:

http://wiki.emacinc.com/wiki/Product_wiki

3.1 Das U-Boot

EMAC utilizes Das U-Boot for its ARM based products. U-Boot is an open source/cross-architecture platform independent bootloader. It supports reading and writing to the flash, auto-booting, environmental variables, and TFTP. Das U-boot can be used to upload and run and/or reflash the OS or to run stand-alone programs without an OS. Products are shipped with a valid MAC address installed in flash in the protected U-boot environmental variable “ethaddr”. At boot time U-Boot automatically stores this address in a register within the MAC, which effectively provides it to any OS loaded after that point.

3.2 Embedded Linux

EMAC Open Embedded Linux (EMAC OE Linux) is an open source Linux distribution for use in embedded systems. The EMAC OE Linux Build is based on the Open Embedded (www.openembedded.org) and Yocto (www.yoctoproject.org) Linux build systems. Open Embedded is a superior Linux distribution for embedded systems. Custom Linux builds are also available on request.

The distribution contains everything a user could expect from a standard Linux kernel: powerful networking features, advanced file system support, security, debugging utilities, and countless other features.

The basic root file system includes:

 Busybox  Hotplugging support  APM utilities for power management  Openssh SSH server  lighttpd HTTP server  JJFS2 or EXT4 file system with utilities

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SoM-112ES User Manual

3.2.1 Linux with Xenomai Real Time Extensions

Xenomai provides real time extensions to the kernel and can be used to schedule tasks with hard deadlines and s latencies. The Xenomai build is an additional module that can be added to the standard Linux kernel and is available for a one-time inexpensive support/installation fee.

http://www.xenomai.org/

3.2.2 Linux Packages

EMAC provides support for many Linux Packages such as: PHP, SQLite, Perl, SNMP, DHCP Server, etc. As with the Xenomai Package, other Packages can be added to the standard Linux file system and are available for a one-time inexpensive support/installation fee.

3.2.3 Linux Patches

In addition to standard Embedded Linux support, EMAC has released a number of patches and device drivers from the open source community and from internal EMAC engineering into its standard distribution. Along with kernel patches, EMAC provides the binaries for the kernel and root file system.

3.3 Qt Creator

Qt Creator is a cross-platform IDE (Integrated Development Environment) tailored to the needs of Qt developers but works well for Headless applications as well. EMAC provides sample code as projects that can be imported into Qt Creator. Qt Creator supports remote deployment and source debugging.

http://wiki.qt.io/Main

3.4 ARM EABI Cross Compiler

The popular open source gcc compiler has a stable build for the ARM family. EMAC uses the 4.9.1 version of the ARM EABI compiler. The Embedded Linux kernel and EMAC Qt Creator projects use this compiler for building ARM stand alone, and OS specific binaries. The EMAC Qt Creator provides source level debugging over Ethernet or serial using gdbserver. The Linux binaries for the ARM EABI cross compiler are available online along with the SDK. See the EMAC wiki for further information.

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SoM-112ES User Manual

Signal

Pin 1

Pin 2

GND

Pin 3

GND

Pin 4

12V

Signal

Pin 1

GND

Pin 2

CAN_L

Pin 3

CAN_H

Signal

3P3_VCC

GND

EXPIO_REF

EXPIO_0

EXPIO_1

EXPIO_2

EXPIO_3

EXPIO_4

EXPIO_5

EXPIO_6

EXPIO_7

GPIO_5/AD-1

GPIO_6/AD-2

GPIO_7/AD-3

GPIO_8/AD-4

GND

GPIO_9/MISO

GND

GPIO_10/MOSI

GND

GPIO_11/SCK

GND

GPIO_12/CS0n

GND

GPIO_13/CS1n

GND

SPI_EXT_MISO

GND

SPI_EXT_MOSI

GND

SPI_EXT_CLK

GND

SPI_EXT_CS1n

GND

SPI_EXT_CS2n

GND

I2C_CLK-E

GPIO_1/IRQ_1

I2C_DAT-E

GPIO_14/PWM1

SOM_RSTO#

GPIO_15/PWM2

4 Appendix A: Connector Pinouts

4.1 4-Pin Molex Male Floppy Power Connector (CN1)

4.2 3-Pin Polarized Locking CAN Connector (CN2)

4.3 Utility GPIO Header (HDR1)

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SoM-112ES User Manual

5V_VCC

GND

10-Pin Header: Description

NC 2 NC

COMA_RX232

COMA_TX232

NC 7 NC 8 NC 9 GND

RS-232 10-Pin Header: Description

RS-422/485 10-Pin Header: Description

COMB_422/485_TX-

COMB_232RX

COMB_422/485_TX+

COMB_232_RTS

COMB_232TX

COMB_422/485_RX+

COMB_232_CTS

COMB_422/485_RX-

NC 9 GND

GND

Signal

GND

LINEIN_L

LINEIN_R

Signal

GND

HP_L

HP_R

4.4 RS-232 Serial Port COM A Header (HDR2)

4.5 RS-232/422/485 Serial Port COM B Header (HDR3)

4.6 Audio Input Jack (JK1)

4.7 Audio Output Jack (JK2)

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DB9 Connector: Description

COMC_232_DCD

COMC_232_RXD

COMC_232_TXD

COMC_232_DTR

COMC_232_GND

COMC_232_DSR

COMC_232_RTS

COMC_232_CTS

COMC_232_RI

Micro USB B 2.0 Connector: Description

PWR

DM (Data -)

DP (Data +)

GND

Signal

PWR

USBB_DM

USBB_DP

GND

CHASSIS_GND

4.8 Serial Port COM C (JK3)

4.9 Micro USB B 2.0 Console Interface Connector (JK4)

4.10 USB Host Port B (JK5)

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SoM-112ES User Manual

Signal

HSTA’_PWR

HSTA’_DM_F

HSTA’_DP_F

GND

CHASSIS_GND

HSTB’_PWR

HSTB’_DM_F

HSTB’_DP_F

GND

Signal

PWR

USBC_DM

USBC_DP

GND

CHASSIS_GND

Signal

ETX-

ETX+

ERX+

GND

ERX-

GND

4.11 USB Host Port A1 & A2 (JK6)

4.12 USB Device Port C (JK7)

4.13 Single Port Ethernet Connector (JK8)

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SoM-112ES User Manual

Signal

Vin

GND

Signal

GPIO_5/AD-1

SOM_RSTO#

SPI_EXT_CS0n

SPI_EXT_CLK

SPI_EXT_MOSI

SPI_EXT_MISO

3P3_VCC

GND

5V_VCC

I2C_DAT_E

I2C_CLK-E

COMD_TXD

MKR_RX_GT

GPIO_1/IRQ_1

GPIO_14/PWM1

Signal

MSD_DAT2

MSD_DAT3

MSD_CMD

MSD_PWR

MSD_SCLK

GND

MSD_DAT0

MSD_DAT1

MSD_CDT#

GND

4.14 Vin Power Barrel Jack (JK10)

4.15 MikroBUS Socket (SOK2)

4.16 Micro SD Card Socket (SOK3)

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SoM-112ES User Manual

Jumper

Position

Setting

Pins 1 & 2

Line Pulled High

Pins 2 & 3*

Line Pulled Low

Jumper

Position

Setting

Pins 1 & 2

Line Pulled High

Pins 2 & 3*

Line Pulled Low

Jumper

Position

Setting

Pins 1 & 2

Flash Disable

Pins 2 & 3*

Flash Enable

Jumper

Position

Setting

Pins 1 & 2

OFF

Disable Battery Backup

Pins 2 & 3*

Enable Battery Backup

Jumper

Position

Setting

Pins 1 & 2

5V SPI Level

Pins 2 & 3*

3.3V

3.3V SPI Level

Jumper

Position

Setting

Pins 1 & 2

5V I²C Level

Pins 2 & 3*

3.3 V

3.3V I²C Level

5 Appendix B: Jumper Settings

5.1 JB1 (Boot0 Source Selection)

*Default Setting

5.2 JB2 (Boot1 Source Selection)

*Default Setting

5.3 JB3 (Flash Write Protect)

*Default Setting

5.4 JB4 (Standby Battery)

*Default Setting

5.5 JB5 (External SPI Interface Voltage)

*Default Setting

5.6 JB6 (External I2C Interface Voltage)

*Default Setting

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SoM-112ES User Manual

Jumper

Position

Setting

Pins 1 & 2*

232

Select RS-232

Pins 2 & 3

4XX

Select RS-422/485 via JB8

Jumper

Position

Setting

Pins 1 & 2

485

Select RS-485

Pins 2 & 3*

422

Select RS-422

Jumper

Position

Setting

Pins 1 & 2*

Enable Port C

Pins 2 & 3

Disable Port C

5.7 JB7 (Serial Port RS-232 or RS-422/485)

*Default Setting

5.8 JB8 (Serial Port RS-422 or RS-485)

*Default Setting

5.9 JB9 (USB Device Port C Enable)

*Default Setting

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SoM-112ES User Manual

6 Appendix C: Dimensional Drawing