SONY Ericsson GM47r5, GM48r5 User Manual

GM47r5/GM48r5

Integrator’s Manual

The GM47r5 described in this manual conforms to the Radio and
Telecommunications Terminal Equipment (R&TTE) directive 99/5/EC with
requirements covering EMC directive 89/336/EEC and Low Voltage directive
73/23/EEC. The product fulfils the requirements according to 3GPP TS 51.010-1, EN
301 489-7 and EN60950.

FCC ID: PY76220511-BV

IC: 4170B-6220511

The GM48R5 described in this manual conforms to the Federal Communications
Commission, FCC Rules Parts 22.901d and 24 E and PTCRB NAPRD.03_TC
version:
V.2.7.2, 3GPP TS 51.010 Version: 3GPP TS 51.010-1 V.5.6.0

SAR statement: This product is intended to be used with the antenna or other
radiating element at least 20 cm away from any part of the human body.

The information contained in this document is the proprietary information of Sony Ericsson
Mobile Communications International. The contents are confidential and any disclosure to

persons other than the officers, employees, agents or subcontractors of the owner or licensee
of this document, without the prior written consent of
Sony Ericsson Mobile Communications International, is strictly prohibited. Further, no
portion of this publication may be reproduced, stored in a retrieval system, or transmitted in
any form or by any means, electronic or mechanical, including photocopying and recording,
without the prior written consent of Sony Ericsson Mobile Communications International,
the copyright holder.

First edition (December 2004)

Sony Ericsson Mobile Communications International publishes this manual without
making any warranty as to the content contained herein. Further Sony Ericsson Mobile
Communications International reserves the right to make modifications, additions and
deletions to this manual due to typographical errors, inaccurate information, or improvements
to programs and/or equipment at any time and without notice. Such changes will, nevertheless
be incorporated into new editions of this manual.

All rights reserved.

© Sony Ericsson Mobile Communications International, 2004
Publication number: LZT 123 8020 R1A

Printed in UK

Contents

Contents.....................................................................................................3

1 Introduction ........................................................................................6

1.1 Target Users..............................................................................................6

1.2 Prerequisites .............................................................................................6

1.3 Manual Structure .......................................................................................6

2 GM47r5/GM48r5 Radio Devices ..........................................................7

2.1 About the GM47r5/GM48r5 Family............................................................7

2.2 Radio Devices in a Communication System..............................................7

2.3 Features ....................................................................................................9

2.3.1 Types of Mobile Station .................................................................9

2.3.2 Short Message Service................................................................10

2.3.3 Voice Calls...................................................................................10

2.3.4 Data .............................................................................................11

2.3.5 SIM Card......................................................................................11

2.3.6 Power Consumption.....................................................................11

2.3.7 Other Features.............................................................................12

2.4 Service and Support ................................................................................12

2.4.1 Web Pages ..................................................................................12

2.4.2 Extranet .......................................................................................12

2.4.3 Integrator’s Manual ......................................................................12

2.4.4 AT Commands Manual ................................................................12

2.4.5 M2mpower Application Guide ......................................................13

2.4.6 Developer’s Kit.............................................................................13

2.5 Precautions .............................................................................................13

2.6 Customer support contact details ............................................................13

3 Abbreviations ...................................................................................15

4 Mechanical Description .................................................................... 17

4.1 Interface Description................................................................................17

4.2 Physical Dimensions ...............................................................................18

5 System Connector Interface ............................................................. 20

5.1 Overview .................................................................................................20

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5.2 General Electrical and Logical Characteristics ........................................23

5.2.1 General Protection Requirements................................................24

5.3 Grounds...................................................................................................24

5.3.1 Analogue Ground - AGND ...........................................................24

5.3.2 Digital Ground - DGND ................................................................25

5.4 VCC - Regulated Power Supply Input .....................................................25

5.5 Battery Charging Input (CHG_IN)(Reserved for future use) ....................26

5.6 Turning the Radio Device ON/OFF and the External Power Signal.........27

5.6.1 VIO - 2.75V Supply ......................................................................29

5.7 Analogue Audio .......................................................................................30

5.7.1 Audio To Mobile Station - ATMS..................................................30

5.7.2 Audio From Mobile Station - AFMS .............................................31

5.7.3 Microphone Signals .....................................................................32

5.7.4 Speaker Signals...........................................................................33

5.8 PCM Digital Audio ...................................................................................34

5.8.1 PCM Data Format........................................................................35

5.9 Serial Data Interfaces ..............................................................................37

5.9.1 UART1 (RS232) - RD, TD, RTS, CTS, DTR, DSR, DCD and RI .38

5.9.2 Serial Data Signals - RD, TD .......................................................38

5.9.3 Control Signals - RTS, CTS, DTR, DSR, DCD, RI.......................39

5.9.4 UART2 - TD2, RD2......................................................................40

5.9.5 UART3 - TD3, RD3......................................................................41

5.10 SIM Card Related Signals .......................................................................41

5.10.1 SIM Detection - SIMPRESENCE .................................................42

5.11 Service/Programming ..............................................................................43

5.12 Buzzer .....................................................................................................43

5.13 LED 43

5.14 General Purpose Digital I/O Ports ...........................................................44

5.15 Extended I/O capabilities.........................................................................45

5.15.1 LED/IO6 Capabilities....................................................................45

5.15.2 I#/O#............................................................................................45

5.15.3 UART3/IO# ..................................................................................46

5.15.4 IO#/ADC# ....................................................................................46

5.16 General Purpose Analogue I/O Ports ......................................................46

5.16.1 Digital to Analogue Converter - DAC ...........................................46

5.16.2 Analogue to Digital Converters 1, 2 and 3 - ADCx.......................47

5.16.3 Analogue to Digital Converters 4 and 5 - IOx/ADCx ....................48

5.17 External I 2C Serial Control Bus...............................................................49

5.18 TX_ON - Burst Transmission...................................................................50

5.19 Real Time Clock ......................................................................................50

6 Antenna Connector........................................................................... 52

7 Hints for Integrating the Radio Device ............................................. 53

7.1 Safety Advice and Precautions................................................................53

7.1.1 General ........................................................................................53

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7.1.2 SIM Card......................................................................................54

7.1.3 Antenna .......................................................................................54

7.2 Installation of the Radio Device ...............................................................55

7.2.1 Where to Install the Radio Device................................................55

7.2.2 How to Install the Radio Device ...................................................56

7.3 Antenna ...................................................................................................57

7.3.1 General ........................................................................................57

7.3.2 Antenna Type ..............................................................................57

7.3.3 Antenna Placement .....................................................................58

7.3.4 The Antenna Cable......................................................................58

7.3.5 Possible Communication Disturbances........................................58

8 TCP/IP Stack ..................................................................................... 60

8.1 Implementation........................................................................................60

9 Technical Data .................................................................................. 61

10 Declaration of Conformity ................................................................ 63

11 Introduction to the Universal Developer’s Kit .................................. 64

11.1 Contents of the Kit...................................................................................64

11.2 Assembling the Developer's Board..........................................................65

11.3 Mounting a GX-47/48 ..............................................................................66

11.4 Assembly instructions:.............................................................................66

11.5 System Requirements .............................................................................67

11.6 GX-47/48 Family; Connection .................................................................67

12 Using the Universal Developer's Kit................................................. 69

12.1 Gx-47/48 Setup .......................................................................................69

12.2 Operation Mode.......................................................................................72

12.3 Serial interface.........................................................................................73

12.4 Engine Application Port - 40-Pin Connector (X600).................................75

12.5 RF Interface.............................................................................................77

12.6 Audio Interface ........................................................................................77

12.7 Keypad Connector (X410) .......................................................................78

12.8 Flashing Firmware ...................................................................................78

12.9 Operation.................................................................................................79

12.10 Flow Control ............................................................................................79

12.11 Power Down ............................................................................................79

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1 Introduction

1.1 Target Users

The GM47r5 and GM48r5 radio devices are designed to be
integrated into machine-to-machine or man-to-machine
communications applications. They are intended to be used by
manufacturers, system integrators, applications developers and
developers of wireless communications equipment.

1.2 Prerequisites

It is assumed that the person integrating the radio device into
an application has a basic understanding of the following:

• GSM networking;

• Wireless communication and antennas (aerials);

• AT commands;

• ITU-T standard V.24/V.28;

• Micro controllers and programming;

• Electronic hardware design.

1.3 Manual Structure

The manual is composed of three parts:

Part 1- Overview

This section provides a broad overview of the GM47r5/GM48r5
family and includes a list of abbreviations used in the manual.

Part 2 - Integrating the Radio Device

This section describes each of the signals available on the
GM47r5/GM48r5 radio devices, along with mechanical
information. The section also provides you with design
guidelines and explains what is needed to commercialise an
application from a regulatory point of view.

Part 3 - Developer’s Kit

This section lists the contents of the Developer’s Kit and
provides the information to setup and use the equipment.

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GM47R5/GM48R5 RADIO DEVICES

2 GM47r5/GM48r5 Radio Devices

2.1 About the GM47r5/GM48r5 Family

Two radio devices make up the family; GM47r5 and GM48r5,
for use in the E-GSM900/GSM1800 and GSM850/GSM1900
bands respectively.

Note! This manual refers to the GM47r5 and GM48r5 as radio

devices. If there is a difference in the functionality of the radio
devices the GM47r5 and GM48r5 information will be listed
separately.

The products belong to a new generation of Sony Ericsson
radio devices, and are intended to be used in machine-to­machine applications and man-to-machine applications. They
are used when there is a need to send and receive data (by
SMS, CSD, HSCSD, or GPRS), and make voice calls over the
GSM network.

The radio devices can either have applications embedded onto
them or they can be used as the engine in an application
created by the customer. The radio device can send and
receive data when a script is executed, the script can be run
internally from the radio device itself or from a micro-controller.
A typical application, involves a micro-controller and a radio
device, in which the micro-controller sends AT commands to the
radio device via an RS232 communications link.

2.2 Radio Devices in a Communication System

Figures 2.1 and 2.2 illustrate the main blocks of a wireless
communication system using the radio device. Figure 2.1
shows the communication system when the script is embedded
on the radio device and figure 2.2 shows the communication
system when a micro-controller is used. They also show the
communication principles of the system and the interface
between the radio device and the application. The definitions in
the figures, as used elsewhere in this manual, are in
accordance with the recommendations of GSM 07.07.

• The MS (mobile station) represents the radio device and
SIM card. The radio device excluding SIM card, is known as
the ME (mobile equipment).

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GM47R5/GM48R5 RADIO DEVICES

• The DTE (data terminal equipment) is the controlling
application. This can be either an external host or an internal
embedded application.

• The DCE (data circuit terminating equipment) is the serial
communication interface of the MS.

Figure 2.1 Main Blocks in a Wireless System (embedded application)

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GM47R5/GM48R5 RADIO DEVICES

Figure 2.2 Main Blocks in a Wireless System (external micro-

controller)

In accordance with the recommendations of ITU-T (International
Telecommunication Union - Telecommunications
Standardisation Sector) V.24, the TE communicates with the
MS over a serial interface.

The functions of the radio device follow the recommendations
provided by ETSI (European Telecommunications Standards
Institute) and ITU-T.

ETSI specifies a set of AT commands for controlling the GSM
element of the radio device; these commands are
supplemented by Sony Ericsson specific commands.

To find out how to work with AT commands, see the AT
Commands Manual.

2.3 Features

The radio device performs a set of telecom services (TS)
according to GSM standard phase 2+, ETSI and ITU-T. The
functions of the radio device are implemented by issuing AT
commands over a serial interface.

2.3.1 Types of Mobile Station

GM47r5 and GM48r5 are dual band mobile stations with the
characteristics shown in the tables below.

GM47r5 E-GSM 900 GSM 1800

Frequency Range (MHz) TX: 880-915

RX: 925-960

Channel spacing 200 kHz 200 kHz

Number of channels 174 carriers *8 time slots 374 carriers *8 time slots

Modulation GMSK GMSK

TX phase accuracy < 5º RMS phase error (burst) < 5º RMS phase error (burst)

TX: 1710-1785
RX: 1805-1880

Duplex spacing 45 MHz 95 MHz

Receiver sensitivity at antenna
connector

Transmitter output power at
antenna connector

Automatic hand-over between E-GSM 900 and GSM 1800

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< –102 dBm < –102 dBm

Class 4
2 W (33 dBm)

Class 1
1 W (30 dBm)

GM47R5/GM48R5 RADIO DEVICES

GM48r5 GSM 850 GSM 1900

Frequency Range (MHz) TX: 824-849

RX: 869-894

Channel spacing 200 kHz 200 kHz

Number of channels 124 carriers *8 time slots 299 carriers *8 time slots

Modulation GMSK GMSK

TX Phase Accuracy < 5º RMS phase error (burst) < 5º RMS phase error (burst)

Duplex spacing 45 MHz 80 MHz

Receiver sensitivity at
antenna connector

Transmitter output power at
antenna connector

Automatic hand-over between GSM 850 and GSM 1900

< –102 dBm < –102 dBm

Class 4
2W (33 dBm)

TX: 1850-1910
RX: 1930-1990

Class 1
1 W (30 dBm)

2.3.2 Short Message Service

The radio device supports the following SMS services:

• Sending; MO (mobile-originated) with both PDU (protocol
data unit) and text mode supported.

• Receiving; MT (mobile-terminated) with both PDU and text
mode supported.

• CBM (cell broadcast message); a service in which a
message is sent to all subscribers located in one or more
specific cells in the GSM network (for example, traffic
reports).

• SMS STATUS REPORT according to GSM 03.40.

The maximum length of an SMS message is 160 characters
when using
7-bit encoding. For 8-bit data, the maximum length is 140
characters. The radio device supports up to six concatenated
messages to extend this function. Concatenation is disabled if
CNMI 3,2 is set (See the AT Commands Manual for further
details).

2.3.3 Voice Calls

The radio device offers the capability of MO (mobile originated)
and MT (mobile terminated) voice calls, as well as supporting

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2.3.4 Data

GM47R5/GM48R5 RADIO DEVICES

emergency calls. Multiparty, call waiting and call divert features
are available. Some of these features are network-operator
specific.

For the inter-connection of audio, the radio device offers both
single ended and balanced analogue input and output lines.
Direct interface to the digital PCM (pulse code modulation) bus
used within the radio device is available, thus by-passing the
internal analogue circuitry.

The radio devices support HR, FR and EFR vocoders. The
GM48R5 also supports the Adaptive Multi Rate (AMR) type of
vocoder.

The radio device supports the following data protocols:

• GPRS (General Packet Radio Service)
The radio devices are Class B terminals. The radio devices
are GPRS 4+1 enabled, which are capable of receiving at a
maximum of four timeslots per frame (down link), and
transmitting in one timeslot per frame (up link).

• CSD (Circuit Switched Data)
The radio devices are capable of establishing a CSD
communication at 9.6 kbps.

• HSCSD (High Speed Circuit Switched Data).
The radio devices support HSCSD communication, with one
timeslot per frame capacity in the up link and two timeslots
per frame capacity in the down link (2+1).

2.3.5 SIM Card

An external SIM card with 3 V or 5 V technology, can be
connected to the radio device via its 60-pin system connector.
The unit does not need any external components to enable this.

2.3.6 Power Consumption

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Idle Mode Transmit/Operation

Voice/CSD < 5 mA < 250 mA (< 2 A peak) GSM 850 and E-GSM 900

Data (GPRS 4+1) < 5 mA < 350 mA (< 2 A peak)

Voice/CSD < 5 mA < 250 mA (<1.75 A peak) GSM 1800 and GSM 1900

Data (GPRS 4+1) < 5 mA < 350 mA (<1.75 A peak)

GM47R5/GM48R5 RADIO DEVICES

Note! The power consumption during transmission is measured at

maximum transmitted power.

2.3.7 Other Features

These include:

• 07.10 multiplexing.

• GPS interoperability.

• SIM application tool kit, class 2 release 96 compliant.

• Embedded application

• On board TCP/IP stack

• AMR (Supported by GM48R5)

2.4 Service and Support

2.4.1 Web Pages

Visit our web site for the following information:

• where to buy radio devices or for recommendations
concerning accessories and components;

• the telephone number for customer support in your region;

• FAQs (frequently asked questions).

The web site address is:

http://www.SonyEricsson.com/M2M

2.4.2 Extranet

The extranet contains all of the more in depth documentation,
such as AT commands manual, software bulletins, etc. To gain
access to the site please contact either your sales person or
customer support.

2.4.3 Integrator’s Manual

This manual provides you with all of the information you need to
integrate the radio device into your application.

2.4.4 AT Commands Manual

The AT Commands Manual provides you with all the AT
commands you can use with your radio device. AT commands
are in logical groups and contain the command, a description of
its functionality and an example of use.

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GM47R5/GM48R5 RADIO DEVICES

2.4.5 M2mpower Application Guide

The M2mpower Application Guide provides you with all the
information you need to build an application using the
M2mpower support environment. This manual is supplied as
part of the M2mpower package. There are also a number of
application notes which accompany the guide showing how to
use specific functionality.

2.4.6 Developer’s Kit

Sony Ericsson provides the developer’s kit to get you started
quickly. The kit includes the necessary hardware required to
begin the development of an application. It includes the
following:

• GSM radio device, GM47r5 or GM48r5;

• This Integrator’s Manual;

• Developer’s kit hardware;

• Developer’s kit accessories;

• Power supply

• RS232 cable

• Headset

• Antenna.

All the user needs to provide, is a computer or micro-controller
and the expertise to use AT commands.

2.5 Precautions

The radio devices are ESD protected up to 4KV contact and
8KV air discharge. It is recommended that you follow electronic
device handling precautions when working with any electronic
device system to ensure no damage occurs to the host or the
radio device. In “Integrating the Radio Device”, page 16 you will
find more information about safety and product care. Do not
exceed the environmental and electrical limits as specified in
Technical Data, page 61.

2.6 Customer support contact details

To contact customer support please use the details below.

Customer Support
Sony Ericsson Mobile Communications (UK) Ltd
M2MCom

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GM47R5/GM48R5 RADIO DEVICES

1 Lakeside Road
Systems Union House
Aerospace Park
Farnborough
Hampshire
UK
GU14 6XP

E mail : [e-mail]

[e-mail]
[e-mail]

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3 Abbreviations

Abbreviation Explanations

AMR Adaptive Multi Rate

ATMS Audio to Mobile Station

AFMS Audio from Mobile Station

CBM Cell Broadcast Message

CBS Cell Broadcast Service

CSD Circuit Switched Data

ABBREVIATIONS

DCE Data Circuit Terminating Equipment

DK Developer’s Kit

DTE Data Terminal Equipment

DTMF Dual Tone Multi Frequency

EA Embedded Application

EFR Enhanced Full Rate

EMC Electro-Magnetic Compatibility

ETSI European Telecommunication Standards Institute

FR Full Rate

GPRS General Packet Radio Service

GPS Global Positioning System

GSM Global System for Mobile Communication

HR Half Rate

HSCSD High Speed Circuit Switched Data

IDE Integrated Development Environment

IP Internet Protocol

ITU-T International Telecommunication Union - Telecommunications

Standardisation Sector

M2mpower Sony Ericsson’s powerful support environment

ME Mobile Equipment

MMCX Micro Miniature Coax

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ABBREVIATIONS

MO Mobile Originated

MS Mobile Station

MT Mobile Terminated

PCM Pulse Code Modulation

PDU Protocol Data Unit

RF Radio Frequency

RFU Reserved for Future Use

RLP Radio Link Protocol

RTC Real Time Clock

SDP Service Discovery Protocol

SIM Subscriber Identity Module

SMS Short Message Service

TCP Transport Control Protocol

UDP User Datagram Protocol

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4 Mechanical Description

4.1 Interface Description

The pictures below show the mechanical design of the radio
device along with the positions of the different connectors and
mounting holes. The radio device is protected with AISI 304
stainless steel covers that meet the environmental and EMC
requirements.

  

 

 

Figure 4.1 Radio Device viewed from below

Figure 4.2 Radio Device, viewed from above

Please note the following:

• Mounting holes positioned at the corners make it possible to
securely bolt the radio device into your application.

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MECHANICAL DESCRIPTION

• Keypad, display, microphone, speaker and battery are not
part of the radio device.

• The SIM card is mounted in your application, external to the
radio device.

• The System Connector is a 60-pin, standard 0.05 in (1.27
mm) pitch type. The pins and their electrical characteristics
are described in
5 System Connector Interface, page 20.

• Information about the Antenna Connector is found in 6
Antenna Connector page 52.

4.2 Physical Dimensions

33.00

50.00

4.78

2.20 (4x)

2.86

2.053.80

30.20

3.00

7.15 2.90

4.60

2.80

1.80

2.30

9.00

46.40

Figure 4.2 Dimensions of the Radio Device

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MECHANICAL DESCRIPTION

Measurements are given in millimetres. See also Technical
Data page 61.

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SYSTEM CONNECTOR INTERFACE

5 System Connector Interface

5.1 Overview

Electrical connections to the radio device (except the antenna),
are made through the System Connector Interface. The system
connector is a 60pin, standard 0.05 in (1.27 mm) pitch device.

The system connector allows both board-to-board and board-to­cable connections to be made. Use a board-board connector to
connect the radio device directly to a PCB, and a board-cable
connector to connect the radio device via a cable.

Figure 5.1 below shows the numbering of the connector pins.

A ground connection is provided at the mounting hole next to
the RF connector on the radio device as shown below. Connect
this ground point to the DGND pins of the radio device by the
shortest, low-impedance path possible. The purpose of this
connection is to allow any antenna ESD strikes to bypass the
radio device’s internal ground path.

Ground
connection

Pin 59 Pin 1

Pin 60 Pin 2

Figure 5.1 Radio Device, viewed from underneath

The following table gives the pin assignments for the system
connector interface and a short description for each signal.

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SYSTEM CONNECTOR INTERFACE

Note! Under the heading “Dir” in the table, radio device input and

output signals are indicated by the letters I and O respectively.

Pin Signal Name Dir Signal Type Description

1 VCC - Supply Power supply

2 DGND - - Digital ground

3 VCC - Supply Power supply

4 DGND - - Digital ground

5 VCC - Supply Power supply

6 DGND - - Digital ground

7 VCC - Supply Power supply

8 DGND - - Digital ground

9 VCC - Supply Power supply

10 DGND - - Digital ground

11 CHG_IN (RFU) - Battery charge

power

12 DGND - - Digital ground

13 IO5

ADC4

14 ON/OFF I Internal pull

15 SIMVCC - Digital 3 V/5 V SIM card power supply. Power output from

16 SIMPRESENCE I Internal pull

17 SIMRST O Digital 3 V/5 V SIM card reset

18 SIMDATA I/O Digital 3 V/5 V SIM card data

19 SIMCLK O Digital 3 V/5 V SIM card clock

I/0 I Digital 2.75V

Analogue

up, open drain

up, open drain

Battery charging

General purpose input/output 5
Analogue to digital converter 4

Turns the radio device on and off.

radio device for SIM Card

SIM Presence
A “1” indicates that the SIM is missing; a
“0” that it is inserted

20 DAC O Analogue Digital to analogue converter

21 IO1 I/O Digital 2.75V General purpose input/output 1

22 IO2

ADC5

23 IO3 I/O Digital 2.75V General purpose input/output 3

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I/O I Digital 2.75V

Analogue

General purpose input/output 2
Analogue to digital converter 5

SYSTEM CONNECTOR INTERFACE

24 IO4

I/O Digital 2.75V General purpose input/output 4

25 VRTC I Supply 1.8V Supply for real time clock

26 ADC1 I Analogue Analogue to digital converter 1

27 ADC2 I Analogue Analogue to digital converter 2

28 ADC3 I Analogue Analogue to digital converter 3

29 SDA I/O 2.75V, internal

I 2 C data

pull up

30 SCL O 2.75V, internal

I 2 C clock

pull up

31 BUZZER O Digital 2.75V Buzzer output from radio device

32 OUT3

DSR

33 LED

IO6

34 VIO O Power Out

O O Digital 2.75V General purpose output 3

Data set ready (UART1)

O

Digital 2.75V Flashing LED

I/O

General purpose I/O 6

Radio device power indication. VIO is a

2.75 V

2.75 V at 75 mA output supply that can be
used to power external circuitry that
interfaces to the radio device

35 TX_ON O Digital 2.75V This output indicates when the GSM radio

device is going to transmit the burst

36 RI

O2

37 DTR

IN1

38 DCD

O1

39 RTS

IO9

40 CTS

O4

O O Digital 2.75V Ring Indicator (UART1)

General purpose output 2

I

Digital 2.75V Data Terminal Ready (UART1)

I

General purpose input 1

O O Digital 2.75V Data Carrier Detect (UART1)

General purpose output 1

I

Digital 2.75V Request To Send (UART1)

I/O

General purpose I/O 9

O O Digital 2.75V Clear To Send (UART1)

General purpose output 4

41 TD I Digital 2.75V Transmitted Data (UART1).

Data from DTE (host) to DCE (radio
device).

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SYSTEM CONNECTOR INTERFACE

42 RD O Digital 2.75V Received Data (UART1).

Data from DCE (radio device) to DTE
(host).

43 TD3

I/O7

44 RD3

I/O8

45 TD2 I Digital 2.75V Transmitted data (UART2).

46 RD2 O Digital 2.75V Received data (UART2).

47 PCMULD I Digital 2.75V DSP PCM digital audio input

48 PCMDLD O Digital 2.75V DSP PCM digital audio output

49 PCMO O Digital 2.75V Codec PCM digital audio output

50 PCMI I Digital 2.75V Codec PCM digital audio input

51 PCMSYNC O Digital 2.75V DSP PCM frame sync

52 PCMCLK O Digital 2.75V DSP PCM clock output

53 MICP I Analogue Microphone Input positive

54 MICN I Analogue Microphone Input negative

I

Digital 2.75V Transmitted data (UART3)

I/O

O

Digital 2.75V Received data (UART3)

I/O

General purpose I/O 7

General purpose I/O 8

Used for flashing the memory.

Used for flashing the memory.

55 BEARP O Analogue Speaker output positive

56 BEARN O Analogue Speaker output negative

57 AFMS O Analogue Audio output from radio device

58 SERVICE I 2.7V Flash programming voltage for the MS.

Enable logger information if not flashing.

59 ATMS I Analogue Audio input to radio device

60 AGND - Analogue Analogue ground

5.2 General Electrical and Logical Characteristics

Many of the signals, as indicated in the table above, are high­speed CMOS logic inputs or outputs powered from a 2.75V±5%
internal voltage regulator, and are defined as Digital 2.75V.
Whenever a signal is defined as Digital 2.75V, the following
electrical characteristics apply.

Parameter Min. Max. Units

High Level Output Voltage (VOH), Io = –2mA 2.2 2.75 V

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LZT 123 8020 R1A

SYSTEM CONNECTOR INTERFACE

Low Level Output Voltage (VOL), Io = 2mA 0 0.6 V

High Level Input Voltage (VIH) 1.93 2.75 V

Low Level Input voltage (VIL) 0 0.5 V

Note! Unused pins can be left floating.

5.2.1 General Protection Requirements

• All 2.75 V digital inputs will continuously withstand and suffer
no damage in the power-on or power-off condition when
subjected to any voltage from - 0.5 V to 3.47 V (3.3 V + 5 %).

• All 2.75 V digital outputs will continuously withstand a short
circuit to any other voltage within the range 0 V to 3 V.

• All analogue outputs will continuously withstand a short
circuit to any voltage within the range 0 V to 3 V.

• The SIM output signals and the SIMVCC supply will
continuously withstand a short circuit to any voltage within
the range 0 V to 4.1V.

Note! Although the unit should be able to withstand the higher

voltages the unit should not be driven at the levels as it will
result in failures over time.

5.3 Grounds

Pin Signal Description

2, 4, 6, 8, 10, 12 DGND Digital ground

60 AGND Analogue ground

There are two ground connections in the radio device, AGND
(analogue ground) and DGND (digital ground). Pin assignments
are shown in the table above.

Note! AGND and DGND are connected at a single point inside the

radio device. They must not be joined together in your
application.

5.3.1 Analogue Ground - AGND

AGND is the return signal, or analogue audio reference, for
ATMS (Audio To Mobile Station) and AFMS (Audio From Mobile
Station). It is connected to the DGND inside the radio device
only. The application must not connect DGND and AGND.

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LZT 123 8020 R1A