EMAC SoM-250ES Manuel utilisateur

SoM-250ES

SoM 200-pin Carrier Board

User Manual

REV. 1.4

EMAC, Inc.

Table of Contents 
Disclaimer.................................................................................................................................................. 1 
1SoM-250 Product Summary.............................................................................................................. 2
1 Specifications...............................................................................................................................................................3 
2SoM-250 Product Details................................................................................................................... 4
1 Jumper Configuration & Connector Descriptions........................................................................................................4 
2 Power Connectors........................................................................................................................................................5 
3 Ethernet........................................................................................................................................................................5 
4 CAN Port .....................................................................................................................................................................5 
5 Serial Ports...................................................................................................................................................................5 
5 USB Host Ports............................................................................................................................................................7 
6 Audio Port....................................................................................................................................................................7 
7 LCD Brightness Control ..............................................................................................................................................7 
8 MicroSD Card Socket.................................................................................................................................................7 
9 Keyboard/Mouse..........................................................................................................................................................7 
10 Analog Inputs...............................................................................................................................................................7 
11 I/O Expansion ..............................................................................................................................................................8 
12 Real-Time Clock..........................................................................................................................................................8 
13 Reset ............................................................................................................................................................................8 
3Software............................................................................................................................................... 9 
1 Introduction..................................................................................................................................................................9 
4Appendix A: Connector Pinouts...................................................................................................... 10 
1 Ethernet 10/100 Base-T connector (JK2)...................................................................................................................10 
2 USB Connector (JK3, JK4, HDR5) ...........................................................................................................................10 
2.1 PortA (JK3 - Host)............................................................................................................................................10 
2.2 PortC (JK4 –OTG)............................................................................................................................................10 
2.3 PortA/B (HDR5)................................................................................................................................................10 
3 Power Jack (JK1).......................................................................................................................................................10 
4 Power Connector (J1) ................................................................................................................................................10 
5 MicroSD Socket (SOK1)...........................................................................................................................................11 
6 CAN (CN5)................................................................................................................................................................11 
7 TTL LCD/Touch/Backlight (CN6)............................................................................................................................11 
8 LVDS LCD/Touch/Backlight (HDR6) ......................................................................................................................12 
9 Misc. General Purpose I/O (HDR1)...........................................................................................................................12 
10 COMA RS-232 Serial Port (CN2) ............................................................................................................................13 
11 COMB RS-232 Serial Port (HDR3)..........................................................................................................................13 
12 COMC RS-232/422/485 Serial Port (HDR4) ...........................................................................................................13 
13 COMD RS-232 Serial Port (HDR2) .........................................................................................................................13 
14 PCD Expansion Connector (ABJ1)............................................................................................................................14 
15 Touch Screen Connector (CN1).................................................................................................................................14 
16 Touch Screen Connector (CN3).................................................................................................................................14 
17 LCD Backlight Connector (CN4) ..............................................................................................................................14 
5Appendix B: Jumper Settings .......................................................................................................... 15 
6Appendix C: Mechanical drawing with dimensions....................................................................... 16 

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.

1SoM-250 Product Summary

Features

•200 Pin SODIMM SoM Connector

•Inexpensive Open-Frame Design

•10/100BaseT Ethernet

•3 RS232 & 1 RS232/422/485 Port

•2 USB 2.0 (High Speed) Host port

•1 USB 2.0 (High Speed) OTG port

•1 CAN 2.0B port

•Socketed Battery

•1 SD/MMC Flash Card Sockets

•1 I2S Audio CODEC with Line-In/Line-Out

•1 Audio Beeper

•Operating Voltage of 12 to 26 Vdc.

•800 x 480 (WVGA) or 1024 x 600 (WSVGA) LCD with LED Backlight

•Touchscreen Interface and Software Controlled Backlight On/Off & Brightness

•FREE Qt Creator IDE with GCC & GDB development tools

1.1 Specifications

LCD –7” LCD (SoM-250ES-000)

•Display Type: 7" TFT Color LCD

•Resolution: 800 x 480 WVGA @ 256K Colors

•Dot pitch: 0.19mm x 0.19mm

•Luminance: 330 (cd/m²)

•Viewing Angle: 55°

•Brightness: Software controlled

•Backlight: White LED (33 LEDS)

•Light Transparency: 80%

•Durability: Over one million touches

LCD –10” LCD (SoM-250ES-001)

•Display Type: 10" TFT Color LCD

•Resolution: 1024 x 600 WSVGA @ 256K Colors

•Dot pitch: 0.22mm x 0.22mm

•Luminance: 250 (cd/m²)

•Viewing Angle from Center: From top, 40° min. (50° typ.), From bottom, 50° min. (60° typ.),

Left and Right, 60° min. (70° typ.)

•Brightness: Software controlled

•Backlight: White LED

•Durability: Over one million touches

Touchscreen Controller

•Type: 4 Wire Analog Resistive

•Resolution: Continuous

•Controller: Built-In

•Driver: WinCE, Linux

Ethernet interface

•Ethernet Type: 10/100 Base-T Ethernet

•Ethernet Interface: On-Board RJ-45 connector

Solid-state Flash Disk

•Removable: 8+ GB of SD, MMC, or SDHC Flash Disk

Mechanical and Environmental

•Dimensions: 7.55" L x 4.15" W x 1.5" H

•Weight: 1.06 lbs..

•Power Supply Voltage: +12 to +26 Vdc.

•Power Consumption: typical ~200 ma. @ 24 Vdc.

•Operating Temperature: 0 ~ 60° C (32 ~ 140° F)

Standard Parts Inventory

•SoM-250 Assembly with 7.0” Touchscreen LCD

•Stainless Steel Mounting Bracket

•Three Serial Port cables

•CDROM with manuals, schematics, and drivers

2SoM-250 Product Details

2.1 Jumper Configuration & Connector Descriptions

The SoM-250 comes 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: Jumpers (see SoM manual for correct Boot settings)

Label

Function

Default

JB1

Boot0 Source Selection

Position B

JB2

Boot1 Source Selection

Position A

JB3

Resident Flash Write Protect

Position B

JB4

RTC Battery ON/OFF

Off

JB5

Serial Port RS422/485 Tx Enable

422

JB6

Serial Port RS232 or 422/485 Mode

232

Table 2: Connectors

Label

Function

CN1

7” Touch Screen Connector

CN2

Serial Port COM A

CN3

10” Touch Screen Connector

CN4

7” LCD Backlight Connector

CN5

CAN Port

CN6

7” LCD Data Connector

Vin Locking Connector

JK1

Vin Power Barrel Jack

JK2

Ethernet

JK3

USB Host Port A & B

JK4

USB OTG Port C

JK5

Audio Input Jack

JK6

Audio Output Jack

HDR1

Misc. I/O Connector

HDR2

Serial Port COM D

HDR3

Serial Port COM B

HDR4

Serial Port COM C

HDR5

Bulkhead USB Connector Port A & B

HDR6

LVDS & Touch Signal Connector

SOK1

MicroSD Card Socket

SOK2

200 pin SOM Socket

ABJ1

PCD-E12 Expansion Module Connector

2.2 Power Connectors

The SoM-250 provides two power connectors. J1 is an AMP/Tyco locking power connector (part# 640445-3),

three-pin type connector that mates with TE Connectivity part# 3-640600-3 power connector. Using this power

input provides for a more rugged/industrial locking connection. JK1 is a standard 5.5mm barrel jack with an inner

diameter of 2.1mm with a center V+ connection. This jack allows for easy connection to a wall mount power

supply (EMAC part number PER-PWR-00035). The SOM-250’s power input uses a switching regulator and allows

a voltage input of +12V DC to +26V DC.

The pinout for the J1 power connector is as follows:

Pin Signal

1 +Vin (+12Vdc to 26Vdc)

2 Chassis GND

3 System GND

2.3 Ethernet

The SoM-250 provides 10/100 Base-T full duplex Ethernet and uses a standard RJ-45 connector (JK2). It can be

connected straight to a hub, or another computer via a crossover Ethernet cable. The Ethernet MAC & PHY are

integrated into the SoM processor module. Activity and Link LEDs are integrated into the RJ45 connector.

2.4 CAN Port

The SoM-250 includes a CAN 2.0B 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 pinout for the CN5 power connector is as follows:

Pin Signal

1 CAN_H

2 CAN_L

3 GND

2.5 Serial Ports

The SoM-250 is equipped with four serial ports, one of which terminates to a male DB9 and the other three which

terminate to 10pin header connectors (see table 2, 3, & 4 below). Three 10-pin header to male DB9 connector

cables are provided, giving easy access to these ports. Baud Rate, stop bits, etc. are all programmable for each

port via software.

COM A is an RS232 compatible port with a full complement of handshaking lines allowing it to communicate with

modems and other devices requiring hardware flow control.

COM B is an RS232 port. This port offers no handshake lines.

COM C can be configured to RS232, RS422, and RS485 via 2 jumpers. To select RS232 set jumper JB6 to 232

(this is the default). For RS422 set jumper JB6 to 4xx and jumper JB5 to 485. To select RS485, set jumper JB6 to

4xx and jumper JB5 to 422.

When using COM C in the RS422/485 mode, a terminating resistor (~120 Ohm) is recommended on the two far

ends of the network.

COM D is an RS232 port. This port offers no handshake lines.

Table 1 (COM A Pinout)

Pin Description for DB9

Connector

DCD

RxD

TxD

DTR

GND

DSR

RTS

CTS

Shield

Table 2 (COM B Pinout)

Pin Description for 10-

Pin Header

Pin Description for DB9

Connector

RxD

TxD

GND

Table 3 (COM C Pinout)

Pin Description for 10-Pin

Header

Pin Description for DB9

Connector

422/485 TX-

232 RX, 422/485 TX+

232 TX, 422/485 RX+

RTS

422/485 RX-

232 TX, 422/485 RX+

GND

CTS

422/485 RX-

RTS

CTS

GND

Table 4 (COM D Pinout)

Pin Description for 10-

Pin Header

Pin Description for DB9

Connector

RxD

TxD

GND

2.5 USB Host Ports

The SoM-250 provides one dual USB 2.0 (USB Port A & B) high speed host port (JK3). USB PortA and PortB

can be accessed from the bulkhead connector (HDR5). EMAC can provide a cable (CAB-40-004) to access these

ports.

In addition to the one USB Host port, the SoM-250 provides a USB On-The-Go (OTG) port. This port can be used

as either a USB Host or USB Device port.

All of the USB ports are equipped with 500mA re-settable Polyfuses. If a USB Device tries to draw more than

500mA from the port, the fuse will open until the device is unplugged or its current requirement is reduced. There

is no software provision for shutting down power to the Ports or detecting when a port is drawing too much

current.

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 amp of power.

2.6 Audio Port

The SoM-250 provides Audio Line Out and Line In capability through two standard audio jacks (JK5 & JK6). Audio

Jack JK5 is stereo line level input and Audio Jack JK6 is stereo line level output. The processor interfaces to the

Audio CODEC through its I2S interface. Command control of the CODEC is done using the processor’s SPI

interface. The CODEC is the Cirrus CS4271, which is a high performance 24-bit Stereo CODEC offering superior

sound quality.

Both the input and output are line level. You will probably not be able to drive an unamplified speaker although

standard headphones will work. Likewise, an un-amplified microphone probably will not work as an input although

the line out of a CD player will work.

2.7 LCD Brightness Control

The SoM-250 offers LCD brightness control that can change the brightness of the LCD via software. The LCD

utilizes LED backlighting. The board provides the backlight with approximately 10 volts at about 220mA. The

processor provides a PWM (SoM pin# 85) that is used to drive the LCD backlight. Changing the duty-cycle of the

PWM directly affects the brightness of the LCD. In addition, the backlight can be turned off or on via SoM port line

GPIO0 (SoM pin#114). This allows screensaver software to automatically turn off the backlight when the unit is

not being used and to automatically turn it back on when the touchscreen is touched.

2.8 MicroSD Card Socket

The SoM-250 provides a high capacity MicroSD socket. This socket is hot-swappable and can accept a wide

variety of Flash Cards. A green activity light (LED LD3) is located towards the left side of the socket. When the

processor is accessing the Flash card this LED will be lit and the card should not be removed at this time. A card

that is written to by the SoM-250 can be read by another computer using an MicroSD card reader. The MicroSD

interface is compatible with Standard and High Capacity MicroSD cards.

2.9 Keyboard/Mouse

The SoM-250 does not provide a PS/2 type keyboard/mouse interface. However, a USB keyboard and mouse

can be used if required.

2.10 Analog Inputs

The analog inputs are available on HDR1 (see table 5 below) and are labeled as analog_04, analog_05,

analog_06 and analog_07. These may or may not be supported by the SoM plugged into this carrier.

2.11 I/O Expansion

The Processor used by the SoM-250 provides a number of unused I/O lines. The SoM-250 provides access to

these lines on connector HDR1. This 44-pin dual row header contains GPIO lines, SPI bus, I2C bus, A/D lines,

interrupts and power pins. Signal names listed in the table below are the SoM names as defined in the SoM 200

pin specification.

Signal

3.3V

GPIO1

GPIO4

GPIO2

GPIO5

GPIO3

GPIO6

INT0

GPIO7

INT1

GND

OSC0

GND

OSC1

GND

ADC4

GND

ADC5

GND

ADC6

GND

ADC7

GND

SPI_MISO

GND

SPI_MOSI

GND

SPI_CLK

SPI_CS3

SPI_CS1

I2C_DAT

I2C_CLK

*SOM_RSTOUT

5V_VCC

GND

5V_VCC

GND

2.12 Real-Time Clock

The SoM-250 is equipped with an external battery for backing up the module’s Real-Time Clock (RTC). Drivers to

access the RTC are included in the operating systems. Jumper JB4 should be placed in the ON position in order

to retain system time when powered down.

2.13 Reset

The SoM-250 provides a Reset Button (PB1). Pressing this button will cause the system to reset.

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