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u-blox AMY-5M Hardware Manual

u-blox AMY-5M Hardware Manual

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AMY-5M
u-blox 5 GPS Modules
Hardware Integration Manual
Abstract
This document describes the hardware features and specifications of
the cost effective and high-performance AMY-5M ROM-Based GPS
module featuring the u-blox 5 positioning engine.
The AMY-5M module boasts the industry's smallest form factor and
is a fully tested standalone solution that requires
integration.
This module combines exceptional GPS performance with highly
flexible power, design, and serial communication options
www.u-blox.com
no host

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Summary of Contents for u-blox AMY-5M

  • Page 1 This document describes the hardware features and specifications of the cost effective and high-performance AMY-5M ROM-Based GPS module featuring the u-blox 5 positioning engine. The AMY-5M module boasts the industry’s smallest form factor and is a fully tested standalone solution that requires no host integration.
  • Page 2 AMY-5M-0-003 ROM5.00 This document and the use of any information contained therein, is subject to the acceptance of the u-blox terms and conditions. They can be downloaded from www.u-blox.com. u-blox makes no warranties based on the accuracy or completeness of the contents of this document and reserves the right to make changes to specifications and product descriptions at any time without notice.

  • Page 3: Preface

    This manual has a modular structure. It is not necessary to read it from the beginning to the end. To help in finding needed information, a brief section overview is provided below: 1. Hardware description: This chapter introduces the basics of function and architecture of the u-blox 5 modules.
  • Page 4 Helpful Information when Contacting Technical Support When contacting Technical Support please have the following information ready: Receiver type (AMY-5M) and firmware version (e.g. V5.00) Receiver configuration Clear description of your question or the problem together with a u-center logfile...

  • Page 5: Table Of Contents

    AMY-5M - Hardware Integration Manual Contents Preface ..........................3 Contents ..........................5 Hardware description ....................8 Overview .............................. 8 Architecture ............................8 Design-in ........................9 Power management ..........................9 2.1.1 Overview ............................9 2.1.2 Power management configuration ....................11 2.1.3 System power consumption ......................
  • Page 6 AMY-5M - Hardware Integration Manual 2.7.1 Schematic design-in checklist for u-blox 5 ................... 27 2.7.2 AMY-5M design .......................... 28 2.7.3 Design for AMY-5M ........................29 Layout design-in checklist ........................31 Layout ..............................32 2.9.1 Footprint ............................. 32 2.9.2 Paste mask ..........................32 2.9.3...
  • Page 7 Minimum bill of material smart antenna ..................... 46 B.1.1 Schematic ............................ 47 B.1.2 Bill of material ..........................48 B.1.3 Layout ............................48 LEA-5 smart antenna with AMY-5M ....................49 B.2.1 Schematic ............................ 50 B.2.2 Bill of material ..........................51 B.2.3 Layout ............................52 Glossary ........................

  • Page 8: Hardware Description

    1.2 Architecture The AMY-5M module consists of two functional parts - the RF and the Baseband sections. See Figure 1 for a block diagram of the AMY-5M. The RF Front-End includes the DC-block, the input matching elements, the integrated Low Noise Amplifier (LNA), the SAW bandpass filter, the u-blox 5 RF-IC and the Crystal.

  • Page 9: Design-In

    Ensure correct wiring, rate and message setup on the module and your host system. Antenna interface For optimal performance seek short routing, matched impedance and no stubs. With AMY-5M an external LNA is required if no active antenna is used. 2.1 Power management 2.1.1 Overview The power supply circuitry can be adapted to various concepts, depending on the intended application.
  • Page 10 AMY-5M - Hardware Integration Manual 2.1.1.2 Base-band I/O supply voltage In general, the digital I/Os of the base-band part are supplied with VDD_IO from the host system. The wide range of VDD_IO allows seamless interfacing to standard logic voltage levels. VDD_IO must be supplied in any case with a voltage in the specified range, as some CFG_xx pins are always read during system boot in order to define the initial configuration of the receiver.

  • Page 11: Power Management Configuration

    GND. If the application uses USB, the correct USB power mode needs to be configured (bus-powered or self powered). See the u-blox 5 Receiver Description including Protocol Specification [1]. 2.1.2 Power management configuration Depending on the application, the power supply schematic will differ. Some examples are shown in the following sections: Supply voltage nominal 3.3 V (2.5 –...

  • Page 12: How To Connect The Power Supply Pins

    Not connected unless using supply capacitors. Table 1: Power Supply Pins 2.1.5 Single 2.5…3.6 V supply A single 3.0V power supply is very easy to design but is not the most economic solution to run u-blox 5 receivers (see section 2.1.3 for details). XTAL_OUT...

  • Page 13: Single 1.75

    AMY-5M - Hardware Integration Manual 2.1.6 Single 1.75…2.0 V supply The single 1.8V power supply a very efficient configuration to run u-blox 5 receivers (see section 2.1.3 for details). Assure minimal serial resistance in the power supply as the current consumption during operation varies significantly over time.

  • Page 14: Separate Supplies Of 1.8 V (1.75

    2.1.7 Separate supplies of 1.8 V (1.75…2.0V) and 1.4 V (1.4…3.6 V) The dual 1.8V and 1.4V power supply the most efficient configuration to run u-blox 5 receivers (see section 2.1.3 for details). It assures stability since the sensitive RF supply is well separated from the fluctuating base band power supply.

  • Page 15: Separate Supplies Of 3.0 V (2.5

    2.1.8 Separate supplies of 3.0 V (2.5…3.6 0V) and 1.4 V (1.4…3.6 V) The dual 3.0V and 1.4V power supply the most efficient configuration to run u-blox 5 receivers (see section 2.1.3 for details). It assures a better stability than a single 3.0V power supply as the sensitive RF supply is well separated from the fluctuating base band power supply.

  • Page 16: Active Antenna Supply

    2.1.10 Active antenna supply With AMY-5M modules active antennas are supplied via an external coil or circuit. AMY-5M modules do not provide the antenna bias voltage for active antennas on the RF_IN pin. It is therefore necessary to provide this voltage outside the module via an inductor as indicated in Figure 8.

  • Page 17: System Functions

    AMY-5M - Hardware Integration Manual 2.2 System functions 2.2.1 EXTINT - external interrupt pin EXTINT0 is an external interrupt pin. It will be used in future AMY-5M releases for wake-up functions in low- power modes. 2.2.2 System monitoring The u-blox-5 GPS Receiver provides System Monitoring functions that allow the operation of the embedded processor and associated peripherals to be supervised.

  • Page 18: Display Data Channel (Ddc)

    DDC implementation refer to the u-blox 5 Receiver Description including Protocol Specification [1]. u-blox 5 GPS receivers normally run in the slave mode. Master Mode is only supported when external EEPROM is used to store configuration. No other nodes are connected to the bus. In this case, the receiver attempts to establish presence of such a non-volatile memory component by writing and reading from a specific location.
  • Page 19 EEPROM or D/A Converter, etc) and can operate as either a transmitter or receiver, depending on the function of the device. The default DDC address for u-blox GPS receivers is set to 0x42. Setting the mode field in the CFG- PRT message for DDC accordingly can change this address.
  • Page 20 (µC / CPU, etc.). As a slave on the bus, the u-blox 5 GPS receiver cannot initiate the data transfers. The master node has the exclusive right and responsibility to generate the data clock, therefore the slave nodes need not be configured to use the same baud rate.
  • Page 21 AMY-5M - Hardware Integration Manual VDD_IO SDA2 SCL2 u-blox 5 M odule EEPROM Figure 13: Connecting external serial I2C memory used by the GPS receiver (see data sheet for exact pin orientation) Note that the case shown on Figure 13 is different than the case when EEPROM is present but used by external host / CPU as indicated on Figure 14.
  • Page 22 Are there spikes or noise on SDA, SCL or even Vdd? They may result from interferences from other components or because the capacitances Cp and/or Cc are too high. The effects can often be reduced by using shorter interconnections. For more information about DDC implementation refer to the u-blox 5 Receiver Description including Protocol Specification [1]. GPS.G5-MS5-08207-A3...

  • Page 23: I/O Pins

    Figure 15: External pull-ups on RXD1, EXTINT0, EXTINT1 2.4.2 Configuration Pins AMY-5M modules provide two pins for boot-time configuration. These pins become effective immediately at start-up. Care needs to be used when connecting these pins, since they can affect the configuration and function of the module.
  • Page 24 AMY-5M - Hardware Integration Manual ROM Defaults Normal Boot Mode Safe Boot Mode TDI/SAFEBOOT_N = TMS/CFG_PIN = 1 TMS/CFG_PIN = 1 Read configuration from Read configuration from Revert to ROM Default configuration pins CFG_xx configuration pins CFG_xx Revert to ROM Defaults...
  • Page 25 Some configuration pins are shared with other functions. During start-up, the module first reads the state of the configuration pins. Afterwards the other functions can be used. For more information about settings and messages see the AMY-5M Data Sheet [1]. GPS.G5-MS5-08207-A3...

  • Page 26: Safeboot_N

    LNA before the SAW filter. 2.6 Active antenna supervisor u-blox 5 firmware supports an active antenna supervisor circuit, which can be connected to AMY-5M via pins PIO08/EXTINT1, PIO17, and PIO18. The external components shown in Figure 19 detect whether an active antenna is connected, i.e.

  • Page 27: Design-In Checklist

    2.7.1 Schematic design-in checklist for u-blox 5 Designing-in an AMY-5M GPS receiver is easy especially when a design is based on the reference design in the Hardware Integration Manual. Nonetheless, it pays to do a quick sanity check of the design. This section lists the most important items for a simple design check.

  • Page 28: Amy-5M Design

    0R to GND for forward compatibility. 2.7.2 AMY-5M design For a minimal Design with AMY-5M the following functions and pins need to be considered: Connect the Power supply to V_DCDC, VDD_IO, VDD_3V, V_BCKP. VDDUSB: Connect the USB power supply to a LDO before feeding it to VDDUSB and V_DCDC or connect to GND if USB is not used.

  • Page 29: Design For Amy-5M

    AMY-5M - Hardware Integration Manual 2.7.3 Design for AMY-5M This is a minimal setup for a PVT GPS receiver with an AMY-5M module. Active Antenna V_BCKP RF_IN Backup Battery V_RESET V_TH AMY-5 VDD_C V_DCDC VDDIO Micro Micro VDDUSB RXD1 Processor...
  • Page 30 AMY-5M - Hardware Integration Manual 2.7.3.1 Pin discription for AMY-5M design Standard Function Remarks Name Description RF_IN RF Input Ground Ground XTAL_OUT RTC Output Leave open if no RTC attached. XTAL_IN RTC Input GND if no RTC attached. VDD_LNA LNA Power Supply See how to connect power in Section 2.1...

  • Page 31: Layout Design-In Checklist

    AMY-5M - Hardware Integration Manual Standard Function Remarks Name Description PIO3 / SCL2 DDC for peripherals Leave open if not used. PIO2 / SDA2 DDC for peripherals Leave open if not used. PIO5 / TxD1 Asynchronous Serial Leave open if not used.

  • Page 32: Layout

    AMY-5M - Hardware Integration Manual 2.9 Layout This section provides important information for designing a reliable and sensitive GPS system. GPS signals at the surface of the Earth are about 15dB below the thermal noise floor. Signal loss at the antenna and the RF connection must be minimized as much as possible.

  • Page 33: Placement

    2.10 Migration considerations With future u-blox GPS platforms PIO 4,7,8 (RX1, EXTINT0, EXTINT1) will belong to the VDD_IO domain as will all the other PIOs. For forward compatibility, PIO 4,7,8 must be pulled up with a 100 kOhms pull-up resistor to VDD_IO.

  • Page 34: Eos/Esd/Emi Precautions

    AMY-5M - Hardware Integration Manual 2.11 EOS/ESD/EMI precautions When integrating GPS receivers into wireless systems, careful consideration must be given to electromagnetic and voltage susceptibility issues. Wireless systems include components which can produce Electrostatic Discharge (ESD), Electrical Overstress (EOS) and Electro-Magnetic Interference (EMI). CMOS devices are more sensitive to such influences because their failure mechanism is defined by the applied voltage, whereas bipolar semiconductors are more susceptible to thermal overstress.

  • Page 35: Electrical Overstress (Eos)

    AMY-5M - Hardware Integration Manual Passive antennas Active Antennas LNA with appropriate ESD rating (see Table 8) Figure 22: ESD Precautions 2.11.4 Electrical Overstress (EOS) Electrical Overstress (EOS) usually describes situations when the maximum input power exceeds the maximum specified ratings. EOS failure can happen if RF emitters are close to a GPS receiver or its antenna. EOS causes damage to the chip structures.

  • Page 36: Gsm Applications

    2.11.7 GSM applications GSM uses power levels up to 2W (+33dBm). The absolute maximum power input at the GPS receiver is -5dBm for Antaris-4 and u-blox 5 GPS receivers. 2.11.7.1 Isolation between GPS and GSM antenna For GSM applications plan a minimum isolation of 40dB. In a handheld type design an isolation of approximately 20dB can be reached with careful placement of the antennas, but this isn’t sufficient.
  • Page 37 AMY-5M - Hardware Integration Manual GPS Carrier Pow er [dBm] 1575.4 M Hz Interference signal signals Jammin g signal GPS input filter GPS input filter -110 characteristics characteristics Frequency [M Hz] 1525 1525 1550 1550 1575 1575 1600 1600 1625...

  • Page 38: Recommended Parts

    AMY-5M - Hardware Integration Manual u-blox blox GPS CDMA, GSM, WCDMA, etc. receiver 5 LNA Figure 28: Measures against out-band interference 2.11.8 Recommended parts Manufacturer Part ID Remarks Parameters to consider Diode ON Semiconductor ESD9R3.3ST5G (2.11.3 B) Standoff Voltage>3.3V • Low Capacitance < 0.5pF ESD9L3.3ST5G...

  • Page 39: Product Handling & Soldering

    3.1 Packaging, shipping, storage and moisture preconditioning For information pertaining to reels and tapes, Moisture Sensitivity levels (MSD), shipment and storage information, as well as drying for preconditioning see the AMY-5M Data Sheet . 3.2 ESD handling precautions ESD prevention is based on establishing an Electrostatic Protective Area (EPA). The EPA can be a small working station or a large manufacturing area.

  • Page 40: Soldering

    After soldering the AMY-5M module, consider an optical inspection step to check whether: The module is properly aligned and centered over the pads 3.3.4 Repeated reflow soldering Only single reflow soldering processes are recommended for boards populated with AMY-5M modules. The internal components should not be soldered multiple times. 3.3.5 Wave soldering Base boards with combined through-hole technology (THT) components and surface-mount technology (SMT) devices require wave soldering to solder the THT components.

  • Page 41: Casting

    Casting will void the warranty. 3.3.10 Use of ultrasonic processes Some components on the u-blox 5 module are sensitive to Ultrasonic Waves. Use of any Ultrasonic Processes (cleaning, welding etc.) may cause damage to the GPS Receiver. u-blox offers no warranty against damages to the u-blox 5 module caused by any Ultrasonic Processes.

  • Page 42: Product Testing

    4 Product testing 4.1 Test parameters for OEM manufacturer Because of the testing done by u-blox, it is obvious that an OEM manufacturer doesn’t need to repeat firmware tests or measurements of the GPS parameters/characteristics (e.g. TTFF) in their production test.

  • Page 43: Appendix

    Appendix A Component selection This section provides information about components that are critical for the performance of the AMY-5M GPS receiver module. Temperature range specifications need only be as wide as required by a particular application. For the purpose of this document, specifications for industrial temperature range (-40 °C...

  • Page 44: Operational Amplifier (U31)

    AMY-5M - Hardware Integration Manual A.5 Operational amplifier (U31) Manufacturer Order No. Linear Technology LT6000 Linear Technology LT6003 Table 14: Recommend parts list for operational amplifier A.6 Dual open-drain buffer (U32) Manufacturer Order No. Fairchild NC7WZ07P6X Table 15: Recommend parts list for dual open-drain buffer A.7 Antenna supervisor switch transistor (T31)

  • Page 45: Standard Resistors

    AMY-5M - Hardware Integration Manual A.11 Standard resistors Name Type / Value Active antenna supply (VDD_3V) 10R 5% 0.1W USB data serial termination 27R 5% 0.1W USB data serial termination 27R 5% 0.1W Pull-up at RXD1 100k 5% 0.1W Pull-up at EXTINT0 100k 5% 0.1W...

  • Page 46: B Reference Designs

    Reference designs are intended as a means to help system integrators to develop their own GPS-enabled end products. On request, u-blox provides a complete reference design package including schematic, Gerber files, PCB blueprint and recommendations. u-blox assumes no design services for this purpose, nor warranties regarding functionality and performance. Contact u-blox support for further information.

  • Page 47: Schematic

    AMY-5M - Hardware Integration Manual B.1.1 Schematic GPS.G5-MS5-08207-A3 Preliminary A p p e n d i x Page 47 of 54...

  • Page 48: Bill Of Material

    AMY-5M - Hardware Integration Manual B.1.2 Bill of material Part number Description CAP CER X5R 0402 2U2 20% 6.3V ROHS CAP CER X5R 0402 2U2 20% 6.3V ROHS CAP CER X5R 0402 2U2 20% 6.3V ROHS FERRITE BEAD MURATA BLM15HD 0402 1000R@100MHZ ROHS...

  • Page 49: Lea-5 Smart Antenna With Amy-5M

    AMY-5M - Hardware Integration Manual B.2 LEA-5 smart antenna with AMY-5M The following reference design is based on a LEA-5 design and supports AMY-5 modules on one PCB and features one serial port as well as a USB connection. If USB is not needed some components can be spared.

  • Page 50: Schematic

    AMY-5M - Hardware Integration Manual B.2.1 Schematic GPS.G5-MS5-08207-A3 Preliminary A p p e n d i x Page 50 of 54...

  • Page 51: Bill Of Material

    AMY-5M - Hardware Integration Manual B.2.2 Bill of material Part number Description CAP CER X7R 0402 10N 10% 16V ROHS CAP CER X5R 0402 1U0 10% 6.3V ROHS CAP CER COG 0402 47P 5% 25V ROHS C2 C7 CAP CER X5R 0402 2U2 20% 6.3V ROHS CAP CER X7R 0402 1N0 10% 16V ROHS CAP CER COG 0402 1P5 +/-0.1P 25V ROHS...

  • Page 52: Layout

    Height Above WGS84-Ellipsoid Low Noise Amplifier Line of sight, NMEA 0183 ASCII based standard data communication protocol used by GPS receivers. PUBX u-blox proprietary extension to the NMEA protocol Position Velocity Time Selective Availability Satellite Vehicle SBAS Satellite Based Augmentation Systems...

  • Page 53: Related Documents

    GPS Antenna Application Note, Doc No GPS-X-08014 GPS Compendium, Doc No GPS-X-02007 Power management considerations with u-blox 5 GPS receivers, Docu. No GPS.G5-CS-08022 For regular updates to u-blox documentation and to receive product change notifications please register on our homepage. Revision history...

  • Page 54: Contact

    AMY-5M - Hardware Integration Manual Contact For complete contact information visit us at www.u-blox.com Offices North, Central and South America Headquarters Asia, Australia, Pacific Europe, Middle East, Africa u-blox America, Inc. u-blox Singapore Pte. Ltd. u-blox AG Phone: +1 (703) 483 3180...

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