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Sony Ericsson RS232 interface for GT47 embedded apps UART Application Note

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Application Note
RS232 interface for GT47
embedded apps UART

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Summary of Contents for Sony Ericsson RS232 interface for GT47 embedded apps UART

  • Page 1 Application Note RS232 interface for GT47 embedded apps UART...
  • Page 2 Second edition (February 2004) Sony Ericsson Mobile Communications. publishes this manual without making any warranty as to the content contained herein. Further Sony Ericsson Mobile Communications. 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.

  • Page 3: Table Of Contents

    RS232 interface for GT47 embedded apps UART Contents INTRODUCTION........................4 DESIGN OVERVIEW ......................5 ........................5 ESCRIPTION RS232......................... 7 RS232......................... 7 DCE (N ) ................... 7 ODEM ....................... 8 PARE ONNECTIONS ASSEMBLY PARTS ......................9 APPENDIX A..........................10 APPENDIX B..........................11 GLOSSARY ..........................

  • Page 4: Introduction

    RS232 interface for GT47 embedded apps UART 1 Introduction The GT47 Control Terminal from Sony Ericsson is a powerful and versatile device that can be used in a wide range of telemetry and telematics applications that rely on the remote exchange of data, voice, SMS or fax via the GSM cellular network.

  • Page 5: Design Overview

    RS232 interface for GT47 embedded apps UART 2 Design Overview 2.1 Description The RS232 Level Translator PCB Assembly consists of a PCB and plastic back shell or ‘hood’ compatible with 9-pin ‘D’ sub-miniature RS232 connectors (DB9). It has been designed to provide a compatible termination to the 15-way cable assembly provided as part of the GT47 Developer’s kit.
  • Page 6 RS232 interface for GT47 embedded apps UART Table 1 - PCB Connections List GT47 Flying GT47 Signa Lead Solder Signal Socke 5 Pin Colour Termina Directio Name t Pin Brown Black Yellow Green Orang ‡ Blue DCD* DTR* DSR* * DB9 signals DCD, DTR and DSR (pins 1, 4 and 6) are internally shorted together to provide a hardware flow control loop back to the DTE.

  • Page 7: 3-Wire Rs232

    RS232 interface for GT47 embedded apps UART 2.2 3-Wire RS232 In the 3-wire configuration, surface mount strap resistors (ST1 and ST2) are not mounted. Flow control should be disabled on each communicating device (AT+ IFC) As the GT47 general purpose outputs each require a resistor pull-up, these are provided on the RS232 interface PCB.

  • Page 8: Spare Connections

    RS232 interface for GT47 embedded apps UART 2.5 Spare Connections The spare soldering terminal, T7, is provided to easily lengthen the connection from the GT47 to the application hardware. The cable provided in the developer’s kit is a fixed 1 metre length, with tinned-copper flying leads.

  • Page 9: Assembly Parts

    RS232 interface for GT47 embedded apps UART 3 Assembly Parts Part Description RS232 Level Translator PCB P/N# 9188-P1B © Sony Ericsson M2M Com R1, R2 1kΩ (0603) C1,C2,C3,C4,C5 100nF (0603) SP3223EEY DB9 Socket (DCE) ST1, ST2 0Ω link resistor (0603)

  • Page 10: Appendix A

    RS232 interface for GT47 embedded apps UART APPENDIX A Figure 1. RS232 Converter Schematic LZT 123 7698 R1B...

  • Page 11: Appendix B

    RS232 interface for GT47 embedded apps UART APPENDIX B Figure 2 - PCB Top Side LZT 123 7698 R1B...
  • Page 12 RS232 interface for GT47 embedded apps UART Figure 3 - PCB Bottom Side LZT 123 7698 R1B...
  • Page 13 RS232 interface for GT47 embedded apps UART Figure 4 - RTS/CTS Flow Control Loop back LZT 123 7698 R1B...

  • Page 14: Glossary

    RS232 interface for GT47 embedded apps UART GLOSSARY Com Port Serial Communications Port Clear To Send Standard Density 9-pin ‘D’-type Sub-miniature Connector Data Carrier Detect Data Communicating Equipment Data Set Ready Data Terminating Equipment Data Terminal Ready Power Supply Ground Connection...

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