rtd GPRS6055ER User manual

BDM-610020058
Rev. A
GPRS6055ER / GPRS6055RER
User's Manual
GSM//GPRS Modem PC/104 Module

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GPRS6055ER / GPRS6055RER
User's Manual
RTD EMBEDDED TECHNOLOGIES, INC.
103 Innovation Blvd
State College, PA 16803-0906
Phone: [phone]
FAX: [phone]
E-mail
[email protected]m
[e-mail]
Web Site
http://www.rtd.com

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Manual Revision History
Rev A New manual
Published by:
RTD Embedded Technologies, Inc.
103 Innovation Boulevard
State College, PA 16803
Copyright 2006 by RTD Embedded Technologies, Inc.
All rights reserved
The RTD Embedded Technologies Logo is a registered trademark of RTD Embedded
Technologies. dspModule, cpuModule, and utilityModule are trademarks of RTD Embedded
Technologies. PC/104, PC/104, and PCI-104 are registered trademarks of the PC/104
Consortium. All other trademarks appearing in this document are the property of their respective
owners.

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Table of Contents
Introduction...................................................................................................................................... 6
Product Overview......................................................................................................................... 6
Board Features ............................................................................................................................ 6
GPRS6055ER Features ....................................................................................................... 6
GSM Receiver ...................................................................................................................... 6
I/O Interfaces................................................................................................................................ 6
16C550 Compatible UART................................................................................................... 6
Connector Description.......................................................................................................... 7
Available Options......................................................................................................................... 7
Getting Technical Support ........................................................................................................... 8
Board Connections.......................................................................................................................... 9
Connector and Jumper Locations................................................................................................ 9
External I/O Connections............................................................................................................. 9
CN7 – Digital Input/Output Connector.................................................................................... 10
CN6 – SIM Module/Connector ............................................................................................... 11
CN7 – GSM Headset Connector............................................................................................ 12
Jumpers ..................................................................................................................................... 13
LED Indicators............................................................................................................................ 13
Board Installation........................................................................................................................... 14
Installing the Hardware.............................................................................................................. 14
Static Precautions .................................................................................................................. 14
Steps for Installing.................................................................................................................. 14
Configuring Software ................................................................................................................. 14
Hardware Description.................................................................................................................... 15
Overview.................................................................................................................................... 15
Block Diagram............................................................................................................................ 15
The GPRS GSM wireless modem module ................................................................................ 16
GPRS/GSM wireless modem module interfaces ................................................................... 16
GSM Antenna considerations................................................................................................. 16

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SIM-card reader ..................................................................................................................... 17
GPRS6055ER Digital I/O........................................................................................................... 17
Interrupts.................................................................................................................................... 17
GPRS6055 Module Programming................................................................................................. 19
Defining the Memory Map.......................................................................................................... 19
Digital I/O ................................................................................................................................... 19
Digital I/O – R/W at BASE + 400h.......................................................................................... 19
Advanced Digital I/O – R/W at GSM BASE + 400h ............................................................... 19
GSM I/O Space.......................................................................................................................... 19
GSM I/O UART (GSM BASE + 0 to GSM BASE + 7)............................................................ 19
GSM Status – R/W at GSM BASE + 402h (00h after reset).................................................. 19
GSM Control – R/W at GSM BASE + 403h (00h after reset)................................................. 19
RTD ISA ID ................................................................................................................................ 19
BA + 800h/BA + 801h RTD ID Data (read only, 8-bit or 16-bit)............................................. 19
BA + 402h RTD ID Reset Pointer (read only, 8-bit only)........................................................ 19
RTD ID Data Read Indexes.................................................................................................... 19
Starting up and logging into the GSM network.......................................................................... 19
INTERRUPTS............................................................................................................................ 19
GPRS6055ER Specifications........................................................................................................ 19
GPRS6055ER Specifications..................................................................................................... 19
Siemens MC55 GSM Modem Specifications............................................................................. 19
GPRS6055ER Operating Conditions......................................................................................... 19
Limited Warranty............................................................................................................................ 19

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Introduction
Product Overview
The GPRS6055 / GPRS6055R are designed to provide tri-band GSM and GPRS for PC/104
based systems. Included on the GPRS6055 is a Siemens MC55 tri-band GSM cellular modem
and on the GPRS6055R is a Triorail TRM:2 tri-band GSM cellular modem for railroad
applications.
The GPRS6055 has a UART chip that permits communication with the serial port on the GSM
over the PC/104 bus without using other serial ports in the PC/104 system. The GSM module
supports an enhanced AT command set.
Board Features
GPRS6055ER Features
oDirect connections to the Siemens MC55/TRM:2 GSM module
oTri-band GSM module
GSM 900/1800/1900 MHz (MC55)
GSM GSM-R/900/1800 MHz (TRM:2)
GPRS Multislot Class 10
AT command set
SMS
Fax
o16 digital I/O
oPC/104 compliant
GSM Receiver
The GPRS6055 wireless GPRS/GSM modem unit provides a direct and reliable GPRS
connection to GPRS/GSM 900/1800/1900MHz mobile fields around the world. GPRS/GSM
connectivity is achieved using the Siemens MC55. This unit works in the 900/1800/1900MHz
bands.
Connect any standard quad-band GSM antenna directly to the MCX connector of the GPRS6055.
The antenna should be connected to the MC55 using a flexible 50-Ohm cable. In IDAN
installations the antenna connection is brought to the front side of the IDAN frame.
A SIM card socket is located on the solder side of the module. The SIM card can only be
removed when the MC55 has been placed in shutdown mode.
I/O Interfaces
The GPRS6055ER can be controlled and monitored by software through the a dedicated serial
port of the module.
16C550 Compatible UART
The GSM receiver module communicates through a dedicated UART channel allowing other
serial ports in the system to be free for the user.

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Connector Description
The GSM antenna interfaces are female MCX type miniature coaxial connectors. Connect your
antenna directly to the GPRS6055ER antenna connector, or use a short cable inside your
enclosure to connect to a feed through connector to allow connection of the antenna to the wall of
your enclosure.
All other I/O connections to the GPRS6055ER use 0.1” header type terminals.
Available Options
The GPRS6055ER is available as a starter kit, bundled with an active antenna. It may also be
purchased as an IDAN module for integration into an RTD IDAN system.
The following is a summary of the different GPRS6055ER configurations:
Part Number Description
GPRS6055ER GPRS6055ER with Siemens MC55 GSM module
SK-GPRS6055ER GPRS6055ER with GSM antenna
IDAN-GPRS6055ERS GPRS6055ER mounted in an IDAN frame
IDAN-SK-GPRS6055ERS GPRS6055ER mounted in an IDAN frame with GSM
antenna
GPRS6055RER GPRS6055RER with Triorail TRM:2 GSM module
SK-GPRS6055RER GPRS6055RER with GSM antenna
IDAN-GPRS6055RERS GPRS6055RER mounted in an IDAN frame
IDAN-SK-GPRS6055RERS GPRS6055RER mounted in an IDAN frame with GSM
antenna
For antenna specifications, please refer to the “Additional Information” chapter of this manual.

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Getting Technical Support
If you are having problems with your system, please try the following troubleshooting steps:
•Simplify the System – Remove modules one at a time from your system to see if there
is a specific module that is causing a problem.
•Swap Components – Try replacing parts in the system one-at-a-time with similar parts
to determine if a part is faulty or if a type of part is configured incorrectly.
If problems persist, or you have questions about configuring this product, obtain the PCI BIOS
listing information of the GPRS6055ER and other modules in the system. After you have this
information, contact RTD Embedded Technologies via the following methods:
Phone: [phone]
E-Mail: [e-mail]
Be sure to check the RTD web site (http://www.rtd.com) frequently for product updates, including
newer versions of the board manual and application software.

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Board Connections
Connector and Jumper Locations
The following diagram shows the location of all connectors and jumpers on the GPRS6055ER.
Future revisions of the GPRS6055ER may have cosmetic differences. For a description of each
jumper and connector, refer to the following sections.
External I/O Connections
The following sections describe the external I/O connections of the GPRS6055ER.
GPRS6055ER Connector and Jumper Locations
CN1 & CN2
PC/104
ISA Bus
CN8
Digital I/O
CN5 SIM
Installed LED
JP4 & JP5 DIO
Pullup/Pulldown
CN3 GSM
Antenna Input
J4 Factory
use only
SIM Card socket
(on bottom) or
connector CN6
CN7 Headset
Connector
JP7 GSM
Address Jumpers
JP2 GSM
Interrupt Jumpers
JP8 GPRS6055 /
COM17045
Jumper

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CN7 – Digital Input/Output Connector
The GPRS6055 offers 16 bit-programmable digital I/O lines. These can be pulled high or low
through 10K Ohm resistors using JP4 to control bits 0 – 7 and JP5 to control bits 8 - 15.
Pin Name CN7 Description GPRS6055 Mode
1 GND Ground
2 DIO0 Digital Input/Output Bit 0
3 DIO1 Digital Input/Output Bit 1
4 DIO2 Digital Input/Output Bit 2
5 DIO3 Digital Input/Output Bit 3
6 DIO4 Digital Input/Output Bit 4
7 DIO5 Digital Input/Output Bit 5
8 DIO6 Digital Input/Output Bit 6
9 DIO7 Digital Input/Output Bit 7
10 +5 VDC +5 Volts DC
11 GND Ground
12 DIO8 Digital Input/Output Bit 8
13 DIO9 Digital Input/Output Bit 9
14 DIO10 Digital Input/Output Bit 10
15 DIO11 Digital Input/Output Bit 11
16 DIO12 Digital Input/Output Bit 12
17 DIO13 Digital Input/Output Bit 13
18 DIO14 Digital Input/Output Bit 14
19 DIO15 Digital Input/Output Bit 15
20 +5 VDC +5 Volts DC
Pin Name CN7 Description COM17045 Mode
1 GND Ground
2 DIO0 Digital Output Bit 0
3 DIO1 Digital Output Bit 1
4 DIO2 Digital Output Bit 2
5 DIO3 Digital Output Bit 3
6 DIO4 Digital Output Bit 4
7 DIO5 Digital Output Bit 5
8 DIO6 Digital Output Bit 6
9 DIO7 Digital Output Bit 7
10 +5 VDC +5 Volts DC
11 GND Ground
12 DIO8 Digital Input Bit 0
13 DIO9 Digital Input Bit 1
14 DIO10 Digital Input Bit 2
15 DIO11 Digital Input Bit 3
16 DIO12 Digital Input Bit 4
17 DIO13 Digital Input Bit 5
18 DIO14 Digital Input Bit 6
19 DIO15 Digital Input Bit 7
20 +5 VDC +5 Volts DC

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CN6 – SIM Module/Connector
The GPRS6055ER can use either an onboard SIM module or an external SIM connected through
a cable. The GPRS6055ER-1 uses an on-board SIM module and will not have CN6 installed.
The GPRS6055ER-2 uses an external SIM module. The pin out of the external connector CN6 is
shown below.
Pin Name CN6 Description
1 GND Ground
2 Vcc SIM Power
3 RST SIM Reset
4 GND Ground
5 IO SIM I/O Data
6 GND Ground
7 CLK SIM Clock
8 IN SIM Card Detect
9 Vcc SIM Power
10 GND Ground
The figure below shows a picture of the external SIM card interface board.
ESIM2035 board

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CN7 – GSM Headset Connector
The GPRS6055ER Headset connector is used to connect a headset to the GSM module for voice
operation. The pin out of the external connector CN7 is shown below.
Pin Name CN7 Description
1 GND Ground
2 MICP1 Microphone 1+
3 MICN1 Microphone 1-
4 EPP1 Earphone 1+
5 EPN1 Earphone 1-
6 MICP2 Microphone 2+
7 MICN2 Microphone 2-
8 EPP2 Earphone 2+
9 EPN2 Earphone 2-
10 GND Ground

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Microphone interface 1 is high impedance (~50k Ohm) and shall be used preferably if an opamp
or a CODEC is connected or additional microphone feeding is needed.
Microphone interface 2 is high impedance (~1k Ohm) and shall be used preferably if internal
microphone feeding can be used, e.g. for an internal microphone.
Both EP1 and EP2 are the same.
Jumpers
The following sections describe the jumper configuration options available on the GPRS6055ER.
For a reference that shows the location of each set of jumpers, refer to the diagram of the
GPRS6055ER at the beginning of this chapter. The default factory jumper settings are listed in
the following table:
Jumper Description Default Factory Setting
JP1 Reserved Reserved
JP2 GSM Interrupt Jumper Default Interrupt 5 and G
JP3 Reserved Reserved
JP4
Pull-up or Pull-down for DIO0-7 1-2 – Pull-up 2-3 – Pull-down (default)
No connect – Neither
JP5
Pull-up or Pull-down for DIO8-15 1-2 – Pull-up 2-3 – Pull-down (default)
No connect – Neither
JP6 Reserved Reserved
JP7 GSM Base Address Jumper (A8 – A3, A9 is high) Default 2E8h
JP8 GPRS6055/COM17045 Mode 1-2 – COM17045 Compatible 2-3 – GPRS6055 (default)
LED Indicators
D1 – On when the SIM card is enabled.
D2 – Reserved
D3 – Reserved
D4 – On when GSM is transmitting
Note: The GSM AT^SSYNC command serves to configure the SYNC pin of the
application interface. The pin can either be used to indicate the current
consumption in a transmit burst (default setting) or to drive a status LED
connected to the pin. See the AT^SSYNC command for details.

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Board Installation
Installing the Hardware
The GPRS6055ER can be installed into a PC/104. It can be located almost anywhere in the
stack, above or below the CPU as long as all PC/104 bus constraints are met.
Static Precautions
Keep your board in its antistatic bag until you are ready to install it into your system! When
removing it from the bag, hold the board at the edges, and do not touch the components or
connectors. Handle the board in an antistatic environment, and use a grounded workbench for
testing and handling of your hardware.
Steps for Installing
1. Shut down the PC/104 system and unplug the power cord.
2. Ground yourself with an anti-static strap.
3. Line up the pins of the GPRS6055ER’s PC/104 connector with the PC/104 bus of the
stack and gently press the board onto the stack. The board should slide into the
matching PC/104 connector easily. Do not attempt to force the board, as this can lead to
bent/broken pins.
4. Attach the external antenna to the MCX connector.
5. If any boards are to be stacked above the GPRS6055ER, install them.
6. Attach any necessary cables to the PC/104 stack.
7. Re-connect the power cord and apply power to the stack.
8. Apply power to the system, and verify that all of the hardware is working properly. Once
power is applied, the GSM module will automatically initialize.
Configuring Software
Refer the software user’s manual for software configuration and operation.

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Hardware Description
Overview
This chapter describes the major hardware building blocks of the GPRS6055ER. The
components discussed in this chapter include:
•Siemens MC55 or Triorail TRM:2 GSM Module
•Antenna
Block Diagram
Below is a block diagram of the GPRS6055ER.
GSM
Engine
EPLD
I
S
A
B
U
S
UART
COM a
COM1
Digital I/O
CN7
SIM
Antenna
LED D1
LED D2
LED D3
LED D4
Interrupts
Address
Jumpers

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The GPRS GSM wireless modem module
The GPRS6055 wireless E-GPRS/GSM modem is built around the Siemens MC55 tri-band
900/1800/1900 MHz GPRS cellular engine. It is designed both for handling complex industrial
applications such as telemetry, telematics or communication, and for integration in stationary or
mobile fields all over the world. General information on this product is available at
www.siemens.com.
The GPRS6055 is capable of powerful communication using GSM data interfacing. GPRS data
rates can reach up to 85.6 kbit/s max downlink depending on the network capacity and the
network load. Engineers must take into account that GPRS data rates will vary dynamically
depending on network conditions. This must be considered when designing software and system
specifications. Roaming agreements and GPRS data support may not in all cases be available
when moving from country to country. Check with your local network provider for GPRS
coverage.
The GPRS6055ER is capable of FAX and standard SMS text messages. The data terminal rate is
9600 baud for all host commands (AT commands). The GPRS6055ER modem module antenna
interface connector uses an MCX connector. The mating antenna connectors and cables are
supplied by RTD.
GPRS/GSM wireless modem module interfaces
The GPRS6055 GPRS/GSM modem is connected to the host computer through a dedicated ISA
serial port. The default configuration for the GSM serial ports is:
GSM Interface
•9600 baud
•8 data bits
•No parity
•1 stop bit
GSM Antenna considerations
Typically standard GSM antennas use a female FME connector. This connector needs an
adapter unit before it can be connected to the GPRS6055ER.
RTD recommends the use of high quality antennas with the GPRS6055ER. We have tested
successfully with antennas from Hirschmann Rheinmetall Elektronik.
Visit http://www.hirschmann.de/ for information on GSM antennae.
A very useful AT command that shows quality of the signal reception is: AT+CSQ. The format of
the response is AT+CSQ: received signal strength, bit error rate. The received signal strength
shows the quality of the network signal and ranges from 0 to 31 as shown in the table below. A
value of greater than 10 should give an acceptable connection. The bit error rate number will
range between 0 and 7.
Received Signal Strength Values (99 = undetectable signal)
0 - 113 dBm 8 - 97 dBm 16 - 81 dBm 24 - 65 dBm
1 - 111 dBm 9 - 95 dBm 17 - 79 dBm 25 - 63 dBm

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2 - 109 dBm 10 - 93 dBm 18 - 77 dBm 26 - 61 dBm
3 - 107 dBm 11 - 91 dBm 19 - 75 dBm 27 - 59 dBm
4 - 105 dBm 21 - 89 dBm 20 - 73 dBm 28 - 57 dBm
5 - 103 dBm 13 - 87 dBm 21 - 71 dBm 29 - 55 dBm
6 - 101 dBm 14 - 85 dBm 22 - 69 dBm 30 - 53 dBm
7 - 99 dBm 15 - 83 dBm 23 - 67 dBm 31 => - 51 dBm
SIM-card reader
Standard 3V and dual voltage SIM-cards can be used with the GPRS6055. Older 5V SIM cards
will not work, though they may operate in standard GSM cellular phones. The SIM-card holder
has a card detection circuit that will in theory allow hot insertion and removal of the card. This is
NOT recommended, since the SIM card contents can become corrupted if it is removed while the
MC55/56 GSM modem is writing to it.
LED D1 will turn on when a SIM card is enabled.
A very useful AT command that shows detection of the SIM card is: AT^SCID. The SIM card
identifier is given as a reply ^SCID: value shows the ID of the SIM card. If no ID is detected the
MC55/56 can not read the SIM card and can not connect to the GSM service provider network.
To add an entry to your SIM card you may use the AT+CPBW command. In this example we add
the RTD phone number [phone] to the SIM card memory location “1” with the following
AT command set:
AT+CPBW=1, 18142348087, 145, RTD
AT+CREG? Will indicate if the GPRS6055 is logged into the network. If the reply for example is
+CREG: 0, 1 it means that connection to the home network is valid. A complete AT-instruction set
documentation is included in the MC55/56 user’s manual.
GPRS6055ER Digital I/O
The GPRS6055ER has 16 bit-programmable digital I/O bits. RTD’s driver software exports
functions to use the digital I/O and the operation is covered in the Drivers Users Manual. JP4
controls a 10K Ohm pull up/down on DIO bits 1-8 and JP5 controls a 10K Ohm pull up/down on
DIO bits 9 -16. For programming information see GPRS6055 Module Programming section.
Interrupts
Interrupts are used to notify the host CPU that an event happened on a particular device. In
general, interrupts are more efficient than a polling technique, where the CPU must query the
device status at regular intervals. Devices that use interrupts have a special connection to the
CPU, called an interrupt request line (IRQ). When the device needs the CPUs attention, it
asserts the IRQ line. Once the interrupt has been processed, the IRQ line is de-asserted.
The GPRS6055ER uses one ISA interrupt for the GSM. However, it will not actually generate
interrupts unless the Interrupt Enable register has been properly programmed.
Since the GPRS6055ER has 16C550 UARTs, it supports all of the standard serial port interrupt
events. These events include:

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•Received data available
•Transmit buffer empty
•Line Status Register change
•Modem Status Register change
A detailed explanation of serial port interrupts is beyond the scope of this manual. For more
information, consult a serial port programming reference. The chapter titled “Additional
Information” lists some resources to help the user.
Note: When the UART clock is running at a higher frequency, transmit/receive interrupts will
happen more frequently. Many operating systems can not process interrupts quickly
enough to handle this load. When developing your software, be sure to consider the
operating system’s limitations.

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GPRS6055 Module Programming
This chapter shows you how to program and use your GPRS6055. It provides a general
description of the I/O map. Detailed serial port programming tips are not within the scope of this
manual.
Defining the Memory Map
The memory map of the GPRS6055 occupies a group of eight bytes of host PC I/O space. This
window is freely selectable by the user by jumpers JP7 for the GSM BASE. After setting the base
address you have access to the internal resources of the GPRS6055 control logic. The board
also has 16 digital I/O lines that can be accessed several ways.
Digital I/O
The 16 digital I/O bits have different functionality in COM17045 and GPRS6055 modes.
COM17045 mode is designed to be software compatible with the RTD COM17045 GSM/GPS
module which is 8 outputs and 8 inputs. GPRS6055 mode, which is the default, allows bit
programmable direction for all bits. Note the digital I/O registers can be accessed at 400h and
404h – 407h above the GSM.
COM17045 Mode (JP8 = COM17045)
ADDR (hex) REGISTER DIR COMMENTS
GSM BASE + 400h Digital I/O I/O Digital I/O Port
GPRS6055 Mode (JP8 = GPRS6055 -- Default)
ADDR (hex) REGISTER DIR COMMENTS
GSM BASE + 400h Digital I/O I/O Digital I/O Port
GSM BASE + 404h Digital I/O I/O Digital I/O bits 0 - 7
GSM BASE + 405h Digital I/O I/O Digital I/O bits 8 – 15
GSM BASE + 406h Digital I/O Dir I/O Digital I/O direction bits 0 - 7
GSM BASE + 407h Digital I/O Dir I/O Digital I/O direction bits 0 - 7
Digital I/O – R/W at BASE + 400h
This register is intended for COM17045 compatibility. If you are using the board in GPRS6055
mode, please use registers at BASE + 404h – 407h.
This address is used to interface to the digital I/O port of the GPRS6055, writing to this address
will transfer the data out of the output port, while reading from this address will return the data
from the digital inputs. The digital I/O is accessed at GSM BASE + 400h. This register is

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compatible with the COM17045 module, but works in either COM17045 or GPRS6055 mode.
Note the default direction of the 16 digital I/O bits is that bits 0 - 7 are outputs and 8 - 15 are
inputs. If you are in GPRS6055 mode and you change the default direction registers, then this
register will not operate properly.
Digital I/O –Write
GSM BASE + 400h
GPRS6055 or COM17045 Modes
Bit 0 Output 0 CN8 Pin 2
Bit 1 Output 1 CN8 Pin 3
Bit 2 Output 2 CN8 Pin 4
Bit 3 Output 3 CN8 Pin 5
Bit 4 Output 4 CN8 Pin 6
Bit 5 Output 5 CN8 Pin 7
Bit 6 Output 6 CN8 Pin 8
Bit 7 Output 7 CN8 Pin 9
Digital I/O –Read
GSM BASE + 400h
GPRS6055 or COM17045 Modes
Bit 0 Input 0 CN8 Pin 12
Bit 1 Input 1 CN8 Pin 13
Bit 2 Input 2 CN8 Pin 14
Bit 3 Input 3 CN8 Pin 15
Bit 4 Input 4 CN8 Pin 16
Bit 5 Input 5 CN8 Pin 17
Bit 6 Input 6 CN8 Pin 18
Bit 7 Input 7 CN8 Pin 19
Advanced Digital I/O – R/W at GSM BASE + 400h
These addresses are used to interface to the digital I/O port in GPRS6055 mode. These are the
same digital I/O as above, but with enhanced capability. The 16 bits each have a direction bit. If
the direction bit is set to output, a value written to the data bit is provided on the connector. A
read will result in the value on the connector pin (i.e. the output value). If the direction is set to
input, a value written to the data bit is ignored and a read will result in the value on the connector
pin.
Digital I/O Data –Write/Read
GSM BASE + 404h
GPRS6055 Mode Only (Reset = 00h)
Bit 0 I/O 0 CN8 Pin 2
Bit 1 I/O 1 CN8 Pin 3
Bit 2 I/O 2 CN8 Pin 4
Bit 3 I/O 3 CN8 Pin 5
Bit 4 I/O 4 CN8 Pin 6
Bit 5 I/O 5 CN8 Pin 7
Bit 6 I/O 6 CN8 Pin 8
Bit 7 I/O 7 CN8 Pin 9