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GlobalTop MT3333 Series Application Note

Gnss module
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GlobalTop Technology Inc.
GNSS Module
Application Note
(MT3333 series)
Revision: A05
Reference layout, design tips, guides, and cautions for GlobalTop GNSS modules.
This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior
permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.
Copyright © 2013 GlobalTop Technology Inc. All Rights Reserved.
th
No.16 Nan-ke 9
Rd, Science-Based Industrial Park, Tainan, 741, Taiwan, R.O.C.
Tel: +886-6-5051268 / Fax: +886-6-5053381 / Email:
sales@gtop-tech.com
/ Web:
Ver. A05
www.gtop-tech.com

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  • Page 1 Reference layout, design tips, guides, and cautions for GlobalTop GNSS modules. This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.
  • Page 2 Add Gmm-3301 module , 2.1.3(b) I2C interface and 2.1.3(c) SPI interface This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.

  • Page 3: Table Of Contents

    Appendix VI: Caution for Reflow Soldering Process ..............42 This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.

  • Page 4: Attention

    10 to 15 minutes to ensure full ephemeris data received. This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.

  • Page 5: Technical Support

    Technical contact information: support@gtop-tech.com This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice. Copyright © 2013 GlobalTop Technology Inc. All Rights Reserved.

  • Page 6: Introduction

    Module Carrion 2 (Gms-g6a) This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice. Copyright © 2013 GlobalTop Technology Inc. All Rights Reserved.
  • Page 7 Titan 3 (Gms-g9) Titan1 (PA6E-CAM) This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice. Copyright © 2013 GlobalTop Technology Inc. All Rights Reserved.

  • Page 8: General Rules For Design-In

    (3) Use enough decoupling capacitors beside VCC for stable voltage. Power design for GNSS module This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.

  • Page 9: Vbackup Backup Battery

    Built-in a charging circuit for GNSS module This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.

  • Page 10: Uart / I2C/ Spi Serial Interface

    (2) Pull-up resistor must be added for I2C bus: This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.

  • Page 11: (C) Spi (Cs/Clk/Miso/Mosi)

    This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.

  • Page 12: Antenna Compliance Design

    PCB trace design for antenna impedance matching This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.
  • Page 13 Note: Chock Coil for reference: LQG15HS33NJ02D (Murata) Mode 2: (External chock coil) This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.
  • Page 14  (External chock coil) This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice. Copyright © 2013 GlobalTop Technology Inc. All Rights Reserved.
  • Page 15 For Gmm-g3(B) module user, you will need Beidou/GPS External Antenna This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.

  • Page 16: 1Pps

    This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.

  • Page 17: 3D_Fix

    Duration: Constant low level output (Firmware customizable) This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.
  • Page 18 (LED ON when high, LED OFF when low) This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.

  • Page 19: Layout Guideline

    In other words, give GNSS module a clean GND plane. This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.
  • Page 20 RF feeding pin on your system PCB and provide the appropriate hole size. This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.

  • Page 21: Keep Far Away From High Profile Or Metal Canned Components

    At the worst case it will decrease the GNSS signal up to ~10dB. This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.
  • Page 22 GNSS Module Application Notes (MT3333 series) Ver. A05 This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.

  • Page 23: Placement

    It is better to have independent trace of power source for any device This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.

  • Page 24: Ground Segmentation

    This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.
  • Page 25 PCB top layer with ground plane except where the chip antenna seats as shown below. This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.
  • Page 26 17 x 20 mm +6dB~+7dB This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice. Copyright © 2013 GlobalTop Technology Inc. All Rights Reserved.

  • Page 27: Metal Effect On The Gnss Module

    -2dB~-4dB 10mm* This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice. Copyright © 2013 GlobalTop Technology Inc. All Rights Reserved.

  • Page 28: Thermal Profile For Smd Modules

    Time 25°C to peak temperature: 8 minutes max. This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.
  • Page 29 Soldering iron: Bit Temperature: Under 380°C | Time: Under 3 second. This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.

  • Page 30: Troubleshooting

    “Free run 1PPS” in section 2.1.6 1PPS. This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.
  • Page 31 The UART transmitter of the module, it outputs the GNSS NMEA information for application. This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.

  • Page 32: Contact

    Technical Support Email: support@gtop-tech.com This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice. Copyright © 2013 GlobalTop Technology Inc. All Rights Reserved.

  • Page 33: Appendix I: Super Capacitor Design

    The example below teaches how to calculate the backup time. This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.

  • Page 34: Appendix Ii: 50 Ω Antenna Matching

    Please refer to the website for one such software: http://web.awrcorp.com/Usa/Products/Optional-Products/TX-Line/ This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.

  • Page 35: Appendix Iii: Uart To Rs232 Interface

    Please refer to the reference circuit below for RS232 signal conversion. SP3320 IC is used here as an example. This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.

  • Page 36: Appendix Iv: Uart To Usb Interface

    Customer may ignore these two pins in the drawing) This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.

  • Page 37: Appendix V: How To Efficiently Transfer 1Pps Through Extended Distances

    80ns. This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.
  • Page 38 The figure below shows the specification of the coaxial cable with the model number RG6U. This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.
  • Page 39 Speed of the waveform (m/s) Delay Time (ns) This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.
  • Page 40 This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.
  • Page 41 Users should not worry this issue. This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.

  • Page 42: Appendix Vi: Caution For Reflow Soldering Process

    GPS module (i.e. PA/Gms Module Series) and may not be applicable to all GPS modules. This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.
  • Page 43 GPS module (i.e. PA/Gms Module Series) and may not be applicable to all GPS modules. This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.
  • Page 44 Figure 6.2: Place GPS module right-side up when running reflow-solder process, do not invert. This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.
  • Page 45 This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.

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