Sony Ericsson GM 48 Design Manuallines
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Sony Ericsson GM 48 Design Manuallines

Sony Ericsson GM 48 Design Manuallines

Gsm module
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GM 47/GM 48
Design Guidelines

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Summary of Contents for Sony Ericsson GM 48

  • Page 1 GM 47/GM 48 Design Guidelines...
  • Page 2 The product described in this manual conforms to the TTE directive 91/263/EEC and EMC directive 89/336/EEC. The product fulfils the requirements according to ETS 300 342-1. The information contained in this document is the proprietary information of Sony Ericsson Mobile Communications. 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, is strictly prohibited.

  • Page 3: Table Of Contents

    GM47/48 Design Guidelines Contents INTRODUCTION ........................5 ........................5 VERVIEW ........................5 RECAUTIONS .........................5 BBREVIATIONS MECHANICAL INTEGRATION....................7 ......................7 HYSICAL IMENSIONS ELECTRICAL INTEGRATION ....................8 ..........................8 ENERAL ........................9 ROUNDING 3.2.1 The Analogue Ground....................9 3.2.2 The Digital Ground (DGND)..................9 ..................10 XTERNAL UPPLY TO ODULE 3.3.1 Power Supply (VCC) ....................10 3.3.2 General Recommendations ...................11 3.3.3...
  • Page 4 GM47/48 Design Guidelines APPENDIX I - TECHNICAL DATA .....................27 APPENDIX II – GM47/48 PIN OUT .....................29 APPENDIX III GSM TRANSMIT WAVEFORM CHARACTERISTICS ........32 BA/SEM/MSC 02:0006 Rev B...

  • Page 5: Introduction

    GM47/48 Design Guidelines Introduction 1.1 Overview The GM47/48 belong to a new generation of Sony Ericsson Mobile Communications GSM modules. This document describes the main characteristics and functionality of the GM 47/48, two dual band products for 900/1800 MHz and 850/1900 MHz GSM bands respectively.
  • Page 6 GM47/48 Design Guidelines Mobile Originated Mobile Station Mobile Terminated Pulse Code Modulation Protocol Data Unit Radio Link Protocol Radio Frequency Real Time Clock Service Discovery Protocol Short Message Service Subscriber Identity Module To Be Defined BA/SEM/MSC 02:0006 Rev B...

  • Page 7: Mechanical Integration

    GM47/48 Design Guidelines Mechanical Integration The GM 47/48 is protected with AISI 304 Stainless Steel covers suitable to fulfil the environmental and EMC requirements. The position of the different connectors and mounting holes are shown in figure 2.1 with dimensions. 2.1 Physical Dimensions Figure 2.1 Physical dimensions of GM 47/48 BA/SEM/MSC 02:0006 Rev B...

  • Page 8: Electrical Integration

    GM47/48 Design Guidelines 3 Electrical Integration 3.1 General The electrical connections to the module (except the antenna), are set through the System Connector Interface. The connector allows the following connections: board to board. board to cable. See section 5 for suppliers and part numbers. The figure 3.1 below indicates the pin numbering scheme.

  • Page 9: Grounding

    GM47/48 Design Guidelines 3.2 Grounding Pins Name Description 2, 4, 6, 8, 10, 12 DGND Digital Ground AGND Analogue Ground There are two ground signals in GM 47/48, Analogue Ground (AGND) and Digital Ground (DGND). The analogue Ground is connected to pin number 60, and the Digital Ground is connected to the System Connector Interface through pin numbers 2, 4, 6, 8, 10 and 12.

  • Page 10: External Supply To Module

    GM47/48 Design Guidelines 3.3 External Supply to Module Pins Name Description 1, 3, 5, 7, 9, 11 Regulated Power Supply Connect all of the pins together in the application in order to carry the current drawn by the module. 3.3.1 Power Supply (VCC) The VCC supplies the module with external power.

  • Page 11: General Recommendations

    GM47/48 Design Guidelines 3.3.2 General Recommendations The power supply conditions for the GM47/48 Vcc connection are as follows: Maximum voltage drop during 200mV transmit burst Maximum Ripple TBD : [estimate 50mV] Table 3.1 Recommended ESR on CBULK : <100m Recommended Maximum DC resistance between PSU and GM47 Vcc : <200m Recommended minimum CBULK : 1000 F [see tables below] The following tables provide a quick indication to recommended...

  • Page 12: On/Off Signal

    GM47/48 Design Guidelines ESR = 50m BULK = 200m LINE Transmit Burst PSU LIMIT CBULK (min) Vcc Dip (approx) 200mV 2.0 Amp 6000 F 1.5 Amp 190mV 6000 F 1.0 Amp 190mV 6000 F 0.5 Amp 200mV *12000 F Table 3.5 Note: When this capacitance is used with the PSU conditions stated, the PSU will reach current limit.

  • Page 13: Sim Connections

    GM47/48 Design Guidelines 3.4 SIM connections All track lengths between the SIM card and the module must be kept below 15cm. This is due to the voltage drop/capacitance associated with the extra track length and it has type approval issues as it will affect timing.

  • Page 14: Audio Connections

    GM47/48 Design Guidelines 3.5 Audio Connections Audio connections for both of the analogue paths are shown below. 3.5.1 Analogue Audio Signal Dir. Description AFMS Audio From Mobile Station ATMS Audio To Mobile Station AGND Ground (return) for analogue audio ATMS and AFMS are the audio input and output for the module. Figure 3.3 shows the connection of the analogue audio signals ATMS and AFMS to the CODEC.

  • Page 15: Advanced Portable Hands Free Functionality

    GM47/48 Design Guidelines Portable Hands Free - This state activates a different amplification factor in the GM47 and activates a microphone bias level of 2V in ATMS when a call is in progress. This is the default state at power-on. Audio Circuit Electrical characteristics All sources must be AC-coupled except the Portable HandsFree microphone, which shall be DC-coupled in order to supply DC current...

  • Page 16: Rf And Antenna Integration

    GM47/48 Design Guidelines It is also used as an ear-piece driver for the Portable Hands Free accessory. Zout (0.3 – 3.5 kHz) Output capacitance 2.2 F Levels > 2.4 Vpp [TBC] Drive capability into 5 k (0.3 – 3.5 kHz) (THD<5%) >...

  • Page 17: Interfacing To A 3.3V Processor

    GM47/48 Design Guidelines 3.7 Interfacing to a 3.3V Processor CMOS gates are used within the GM47 and therefore the output drive is virtually rail to rail for small loads. So direct interface from the GM47 to low voltage logic gates is possible. Expect V = 2.5V for small loads (100 A).

  • Page 18: Software Download And Logging Circuitry

    GM47/48 Design Guidelines Many level shifting I/C’s are also available which would perform a similar function as described above i.e. a suitable device is a Max3372 for level shifting. Note : ESD protection is not a requirement for the level shifter. 3.8 Software download and logging circuitry Below the circuitry is shown which allows software download and logging to be performed.

  • Page 19: Developers Board

    GM47/48 Design Guidelines 4 Developers Board The developers board is the reference design against which the module has been type approved, the circuit diagram for this is available upon request from customer support 4.1 Power Circuit A 3A simple switcher step down voltage regulator has been used to produce the module Vcc.

  • Page 20: Emc

    GM47/48 Design Guidelines 4.5 EMC The circuit ground is bonded to the metal chassis of the developers kit box, all signal connections are filtered via ferrite chokes. 4.6 Data signals: The data and handshake lines are converted between 2.7V & 5V logic and then between 5V &...

  • Page 21: Part Numbers

    GM47/48 Design Guidelines 5 Part numbers 5.1 System connector A connector that can be used to interface to the system connector is the Samtech FLE or SFMC or CLP series, the female part number is CLP- 130-02-F-D. This connector or an equivalent can be sourced from imperial connectors below, again this company is just an example of one supplier.

  • Page 22: Ims Connectors

    GM47/48 Design Guidelines System connector For the system connector follow http://www.imperial-connect.co.uk/products/prodprofile127.html click on ITRQPGA thumbnail. 5.4.2 IMS connectors Connector cables from MMCX to SMA can be ordered from this supplier normally with a 2-3 week lead time. BA/SEM/MSC 02:0006 Rev B...

  • Page 23: Type Approval

    After that, all documentation together with the test reports and certificates of the application should be sent to Sony Ericsson in order to register the application to the accessories list for the approval of the module, this will aid the approval of the application world wide.

  • Page 24: Power Supply

    GM47/48 Design Guidelines 6.2 Power supply It is essential the application power supply is designed to comply with the specification in section 3. This will be sufficient to pass type approval, no RF testing will be required if it meets these specifications. BA/SEM/MSC 02:0006 Rev B...

  • Page 25: Sim Testing

    GM47/48 Design Guidelines 6.3 SIM Testing SIM electrical testing does need to be carried out since the electrical paths from which it was originally approved against (developers kit board) have changed. This will typically take around 3 hours in a test house.

  • Page 26: Gm48

    If the GM47 software is updated there should be no further action required by the system integrator as accessories lists are generally carried across between TA certificates and any software supplied by Sony Ericsson will be fully Type Approved. BA/SEM/MSC 02:0006 Rev B...

  • Page 27: Appendix I - Technical Data

    Switched off: < 100 A Radio specifications Frequency range: GM 47: EGSM 900 MHz and 1800 MHz (Dual Band) GM 48: GSM 850 MHz and 1900 MHz (Dual Band) Maximum RF output power: 2 W / 1 W Antenna impedance:...
  • Page 28 GM47/48 Design Guidelines Shock response spectrum II, peak acceleration: - 3 shocks in each axis and direction: 1000 m/s2, 6 ms Bump: Acceleration 250 m/s2 Free fall transportation: 1.2 m Rolling pitching transportation: Angle: ±35 degrees, period: 8s Static load: 10 kPa Low air pressure/high air pressure: 70 kPa / 106 kPa...

  • Page 29: Appendix Ii – Gm47/48 Pin Out

    GM47/48 Design Guidelines Appendix II – GM47/48 Pin out Signal Name Signal Type Description Supply Power Supply DGND Digital Ground Supply Power Supply DGND Digital Ground Supply Power Supply DGND Digital Ground Supply Power Supply DGND Digital Ground Supply Power Supply DGND Digital Ground Supply...
  • Page 30 GM47/48 Design Guidelines TIMESTAMP Dig. 2.75 Timestamp Timestamp is reserved for future use, if A- GPS is implemented on network side. Dig. 2.75 Flashing LED Power Out 2.75 Module powered indication. The VIO is a 2.75 V output that could power external devices to transmit data towards the GSM device to a 75mA max.
  • Page 31 GM47/48 Design Guidelines BEARN Analogue Speaker output negative AFMS Analogue Audio output from module SERVICE 12V/2.7V Flash programming voltage for the MS. Enable logger information if no flashing Former VPPFLASH ATMS Analogue Audio input to module AGND Analogue ground BA/SEM/MSC 02:0006 Rev B...

  • Page 32: Appendix Iii Gsm Transmit Waveform Characteristics

    GM47/48 Design Guidelines Appendix III GSM transmit waveform characteristics The simplified GSM loading characteristics and power supply reference model in relation to the GM47 system connector is represented in figure 1. J1 represents the interface to the GM47 system connector and the voltage there is referenced Vcc.
  • Page 33 GM47/48 Design Guidelines 577 s TRANSMIT GM47 Vcc Figure 2 - Transmit Burst Vcc Waveform A. The sharp fall in voltage in this region is caused by the ESR of the capacitors (mounted as close to the module Vcc pins as possible.

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