Telit Wireless Solutions SE867-AGPS User Manual
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Telit Wireless Solutions SE867-AGPS User Manual

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SE867-AGPS User Guide
1VV0300860 Rev. 0 - 2009-10-23

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  • Page 1 SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23...
  • Page 2 SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 This document is relating to the following products: PRODUCT SE867-AGPS Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 2 of 62...

  • Page 3: Table Of Contents

    6.1. RF design guidlines ......................20 6.2. GPS antenna PCB line guidelines ................... 22 6.3. Antenna installation guidelines ..................22 7. Mounting the SE867-AGPS on the application board ..........23 7.1. Stencil ..........................23 7.2. PCB pad design ......................23 7.3.
  • Page 4 9.1.3.6. Position Pinning Configuration ..................... 49 9.2. Assisted GPS – AGPS ...................... 51 9.3. Analysis Tool ........................52 10. SE867-AGPS evaluation kit ..................53 10.1. Short description......................53 11. Conformity assessment issues..................54 12. Safety recommendations ...................55 Appendix A– Datum Codes ....................57 Reproduction forbidden without Telit Communications S.p.A.
  • Page 5 SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 DISCLAIMER The information contained in this document is the proprietary information of Telit Communications S.p.A. and its affiliates (“TELIT”). 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 Telit, is strictly prohibited.

  • Page 6: Introduction

    SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 Introduction The information presented in this document is believed to be accurate and reliable. However, no responsibility is assumed by Telit Communications S.p.A. for its use, nor any infringement of patents or other rights of third parties which may result from its use.

  • Page 7: Text Conventions

    All dates are in ISO 8601 format, i.e. YYYY-MM-DD. 1.4. Related Documents The following documents are related to this user guide: [1] “SE867-AGPS Product description” [2] “SE867-AGPS Evaluation Board User Guide” All documentation can be downloaded from Telit official web site www.telit.com if not otherwise indicated.

  • Page 8: Overview

    Overview This document is a user guide for developing a GPS application based on Telit Communications S.p.A. stand-alone GPS module SE867-AGPS. This document cannot embrace the whole hardware solutions and products that may be designed. The information given is a guide line and a starting point for properly developing products with the Telit stand-alone module.

  • Page 9: Mechanical Dimension

    SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 Mechanical Dimension Telit SE867-AGPS module overall dimensions are:  Length: 18 mm  Width: 18 mm  Thickness: 3.5 mm  Weight 1.8 g Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved...
  • Page 10 SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 Bottom side Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 10 of 62...

  • Page 11: Gps Module Connections

    SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 GPS module connections 4.1. PIN-OUT Ball Signal Function Type Notes Miscellaneous Functions RFEN Active high enable signal of RF section Control RFXEN Active low enable signal of RF section Control BOOTSEL Boot mode selection signal...

  • Page 12: Pin-Out View

    SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 Ball Signal Function Type Notes N.C. N.C. N.C. N.C. 4.2. Pin-out view RFEN RFXEN 1V8_RF 1V8_DIG VDD_REG_IN BOOTSEL WAKE1 1V8_RF_EN 1V8_DIG_EN RTC_IN VDD_CTRL IOVDD_AIN VREG_OUT RTC_OUT TX_UART RESET RF_IN RX_UART V_IO NOTE: The drawing above is a top view.

  • Page 13: Electrical Description

    SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 Electrical description The power supply circuitry and board layout are a very important part in the full product design and they strongly reflect on the product overall performances, hence read carefully the requirements and the guidelines that will follow for a proper design.
  • Page 14 SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 Figure 1 Power supply connections for configuration 1 The voltage ranges for this configuration are: Voltage 2.5V 4.2V V_IO 2.7V 3.3V VDD_REG_IN 3.6V The condition VDD_REG_IN  V_IO must be satisfied for every module power mode (included power save modes).

  • Page 15: Configuration 2

    SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 5.1.2. Configuration 2 This configuration is similar to the previous one with the difference that the V_IO is now set to 1.8V and the I/O logic levels have changed consequently. This change in the V_IO levels requires also a change in the IOVDD_AIN supply.

  • Page 16: Configuration 3

    SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 5.1.3. Configuration 3 In this configuration, the internal regulators are bypassed and the module power consumption is reduced. The internal LDO must be disabled via 1V8_DIG_EN and 1V8_RF_EN signals and to separate 1.8V supplies must be connected to the 1V8_DIG and 1V8_RF pins.
  • Page 17 SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 Figure 4 power supply connections for configuration 3 (I/O at 1.8V) 1V8_DIG and 1V8_RF limits are the same reported above. Note: Please note that the diagrams above report only the required connections.

  • Page 18: Power-On Sequence

    5.2. Power-on Sequence A few rules must be respected when powering the SE867-AGPS module. When using a configuration with a 3V power supply on the V_IO pin attention must be paid in order to avoid asserting V_IO when the 1V8_DIG is not asserted as well. Indeed applying 3V without the core voltage will cause improper internal of the GPS chipset with a subsequent large current flow and potential device damage.
  • Page 19 SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 Important: in the previous table VDDIO represents the reference voltage of the different signals. Please refer to the following table for a signal-to-reference voltage mapping. Signal-to-reference voltage mapping Signal Reference voltage RFEN...

  • Page 20: Rf Path And Antenna

    6.1. RF design guidlines The SE867-AGPS module requires an external RF path with a net gain > 16dB and a noise figure < 1.5dB in order to achieve the best performances. In order to achieve this gain designs with external LNA and/or active antenna are allowed, even if the suggestion for better RF performances is to concentrate the path gain in the active antenna avoiding the LNA when such an antenna is available.
  • Page 21 SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 Figure 5 Antenna bias tee ANTENNA LINE ON PCB REQUIREMENTS Impedance [Ohm] Coupling with other signals is not allowed Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 21 of 62...

  • Page 22: Gps Antenna Pcb Line Guidelines

    GND guard trace parallel to the signal trace),or shielded with a metal frame cover.  If EM noisy devices are NOT placed close to the PCB hosting the SE867-AGPS, the antenna line should be realized in microstrip technology (signal trace on the...

  • Page 23: Mounting The Se867-Agps On The Application Board

    SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 Mounting the SE867-AGPS on the application board The Telit SE867-AGPS module has been designed in order to be compliant with a standard lead-free SMT process. 7.1. Stencil Stencil’s apertures layout can be the same of the recommended footprint (1:1), we suggest a thickness of stencil foil ≥...
  • Page 24 SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 Dimension Value [mm] Ball pitch Solder resist opening diameter A 1,150 Metal PAD diameter B 1 +/- 0,05 Placement of microvias not covered by solder resist is not recommended inside the inhibit area (1.6 mm - red circle in the picture) unless the microvia carry the same signal of the pad itself...

  • Page 25: Solder Paste

    SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 7.3. Solder paste Lead free Solder paste Sn / Ag / Cu 7.4. SE867-AGPS solder reflow The following is the recommended solder reflow profile Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved...
  • Page 26 NOTE: All temperatures refer to topside of the package, measured on the package body surface. IMPORTANT: SE867-AGPS module can accept only one reflow process Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 26 of 62...

  • Page 27: Moisture Sensitivity

    Moreover, the customer has to take care of the following conditions:  The shelf life of SE867-AGPS inside of the dry bag shall be 12 month from the bag seal date, when stored in a non-condensing atmospheric environment of <40°C / 90% RH ...

  • Page 28: Software Features

    SE867-AGPS custom NMEA messages. 9.1. GPS NMEA 0183 SE867-AGPS relays GPS data stream conform to NMEA 0183 format. Default output format configuration is 4800bps, 8N1. Other available output configuration speeds are: 9600, 19200, 38400, 57600 and 115200 bps.

  • Page 29: Custom Nmea Sentences

    Please refer to NMEA 0183 standard ( http://www.nmea.org) for a deeper description about information carried by each NMEA data set. 9.1.2. Custom NMEA Sentences SE867-AGPS custom NMEA messages are structured according to the standard template of NMEA format: $PUNV,<command/response>*cc<carriage return><new line> “...

  • Page 30: Assist

    SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 For the custom NMEA messages the maximum size of the input messages is 128 characters and for the output messages 200 characters. 9.1.2.1. ASSIST With ASSIST command the user can inject time assistance into the navigation software.

  • Page 31: Storelgf

    SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 decimal fraction of minutes (0000…9999). Leading zeros always included for degrees and minutes to maintain fixed length. Trailing zeros always added for decimal-fraction of minutes to maintain fixed length. is longitude direction, which indicates the longitude direction: East ( ) or West ( is heading in degrees (optional).

  • Page 32: Sleep

    SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 When alias is used the command has the following form: alias $PUNV,START, alias is a mnemonic specifying the particular bitmask. Alias Bitmask Description Start-up with no prior information and reset configuration (FSH and RAM)

  • Page 33: Wakeup

    Please note that specified sleep time determines exactly the period of time, when power consumption of single-chip GPS receiver stays low. If measuring sleep time by watching NMEA stream, it might be several seconds longer due to processing overhead in SE867-AGPS firmware related to messages processing, UART queue flushing delays etc. 9.1.2.6.

  • Page 34: Config

    So effectively it is equal to $PUNV,STOP,0*35 Please note that the confirmation for STOP command will be echoed only after the system has stopped. Until that SE867-AGPS will produce navigation data. 9.1.2.8. CONFIG With CONFIG command the user can change the configuration of the system.

  • Page 35: Set

    SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 9.1.2.9. With SET command the user can change the configuration of the system. The configuration takes effect immediately, but the new configuration is not stored in nonvolatile media. The format of SET command is the following:...

  • Page 36: Eph 1,2,3

    EphMask indicates if SE867-AGPS has valid ephemeris for particular PRN. 0A050301 means that SE867-AGPS has valid ephemeris for PRN's 28, 26, 19, 17, 10, 9, and 1. NOTE: Any ephemeris from a predicted process (SAGPS or whatever) will have its $PUNV,EPH,1,01,0A050300,…...
  • Page 37 SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 SF1_9[23:16] - af2: SV Clock Correction (sec/sec2) [7:0] SF1_9[15:0] - af1: SV Clock Correction: (sec/sec) [15:0] SF1_10[23:2] - af0: SV Clock Correction: (sec) [21:0] SF2_3[23:16] – IODE: Issue Of Data, Ephemeris [7:0] SF2_3 [15:0] –...

  • Page 38: Eph0

    SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 SF3_4[23:0] - (OMEGA)0: Longitude of Ascending Node of Orbit Plane at Weekly Epoch (semi-circles) [23:0] SF3_5[23:8] - Cis: Amplitude of the Sine Harmonic Correction Term to the Angle of Inclination (radians) [15:0]...

  • Page 39: Cfg_R

    SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 $PUNV,EPH,0, EphMask AlmMask EphMask AlmMask Please see section _3.3.13 for description of fields in this message. This message is generated when no ephemeris is valid. 9.1.2.15. CFG_R CFG_R sentence is a reply message for request of reading configuration. This NMEA message contains all configuration information about the selected section.
  • Page 40 SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 data is the error specific optional data. Five decimal digits with leading zero if necessary. This document describes only those error codes that occur with NMEA commands. Subsystem Error Data Description AGPS message processing error. Message ID in the...

  • Page 41: Configuration Sections

    SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 Examples of error messages: Illegal CRC: $PUNV,ERR,05,00006,00000*5B Illegal command: $PUNV,ERR,05,00003,00000*5E 9.1.2.18. OK is an acknowledgement message, which is sent as reply of successful execution of command, sent via different protocol. Currently OK is sent to confirm successful execution of commands sent via AGPS protocol.
  • Page 42 SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 CM-OutCM-In UART NMEA_MASK/UBP_MASK $PUNV,SET,00, ,0,1000, Default Name Format Valid values Description value 00 – NMEA 01 – UBP hexadecim 04 – AGPS 3GPP CM-In 00 - NMEA Input communication protocol 05 – AGPS 3GPP2 digits 09 –...
  • Page 43 SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 Comma separated list of hexadecimal UBP message IDs, which are sent out by UART. The maximum number of IDs in the list is limited by the maximum size of custom NMEA sentence, which is 128 characters.

  • Page 44: Time Zone Configuration

    SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 $PUNV,CFG_S,00*53 In case of failure of execution of GETCONFIG, CONFIG or SET command the receiver sends ERR reply message. Please see ERR section for details. Examples: To produce all other messages but EPH, DTM and FOM at the speed of 115200 bps:...

  • Page 45: Version Number

    NMEA, then version numbers message is also reported after power-on, any commanded start command described in 9.1.2.4 section and after exiting sleep mode. In this case version numbers message is used for notification that SE867-AGPS initialization sequence is complete and it is ready to accept commands.

  • Page 46: Sbas Configuration

    SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 In case of failure of execution of this command the receiver sends ERR reply message. Please see ERR section for details. 9.1.3.4. SBAS Configuration SBAS configuration is used to configure SBAS functionality.

  • Page 47: Datum Configuration

    SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 9.1.3.5. Datum Configuration Datum configuration is used to select the output datum. The current configuration can be read in the system by the following command: $PUNV,GETCONFIG,13*43 The answer is as follows: Name...
  • Page 48 SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 Name Format Valid values Default value Description Datum centre X shift in respect to Decimal -1…2 WGS84 ellipsoid (in meters). Datum centre Y shift in respect to Decimal -1…2 WGS84 ellipsoid (in meters).

  • Page 49: Position Pinning Configuration

    SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 $PUNV,CONFIG,16,1*0D 9.1.3.6. Position Pinning Configuration Position pinning configuration is for static case parameter configuration. The current configuration can be read in the system by the following command: $PUNV,GETCONFIG,17*47 The answer is as follows:...
  • Page 50 SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 Default Name Format Valid values Description value The threshold value for position jump. Decimal Position pinning will be disabled if this Position with value is reached (in meters). Zero values ≥0 Threshold...

  • Page 51: Assisted Gps - Agps

    $PUNV,CONFIG,17,50,1,120,600,7*cc 9.2. Assisted GPS – AGPS SE867-AGPS supports Assisted GPS (AGPS) technology to speed up navigation in challenging environments: indoors, in urban canyons and in other locations where broadcast satellite signals are obscured. AGPS can also accelerate the navigation process in conditions where broadcast ephemeris is available, by quickly securing location information from non-broadcast sources, thus reducing power consumed in satellite search mode.

  • Page 52: Analysis Tool

    SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 9.3. Analysis Tool SE867-AGPS module can be evaluated through commomn GPS environment analysis tools (e.g., such as VisualGPS and VisualGPSXP or similar tools) that allow the user to view:  Navigation Data (2D/3D Fix, Latitude, Longitude, Altitude, Speed, Heading, TTFF, Date, Time,HDOP, VDOP, PDOP) ...

  • Page 53: Se867-Agps Evaluation Kit

    10.1. Short description In order to give to the customer the possibility to evaluate the performances of Telit SE867-AGPS module in all the available configurations, an evaluation kit has been developed. The evaluation kit consists in a single board with: ...

  • Page 54: Conformity Assessment Issues

    Conformity assessment issues Assessment of the final product must be made against the essential requirements of the EMC and the LVD Directives. The SE867-AGPS module is conform to the following European Union Directives:  Low Voltage Directive 2006/95/EEC and product safety ...

  • Page 55: 12. Safety Recommendations

    SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 12. Safety recommendations READ CAREFULLY Be sure the use of this product is allowed in the country and in the environment required. The use of this product may be dangerous and has to be avoided in the following areas: ...
  • Page 56 SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 The text of the Directive 99/05 regarding telecommunication equipments is available, while the applicable Directives (Low Voltage and EMC) are available at: http://europa.eu.int/comm/enterprise/electr_equipment/index_en.htm Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved...

  • Page 57: Appendix A- Datum Codes

    SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 Appendix A– Datum Codes ID NMBR NAME Region of use User defined WGS84 Global ADI-M Ethiopia; Sudan ADI-E Burkina Faso ADI-F Cameroon ADI-A Ethiopia ADI-C Mali ADI-D Senegal ADI-B Sudan Somalia AIN-A...
  • Page 58 SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 Argentina Phoenix Islands South Africa Bahamas; Florida Tunisia New Zealand (Chatham Island) Paraguay Brazil Guinea Deception Island; Antarctica Indonesia (Sumatra) New Georgia Islands (Gizo Island) Easter Island Estonia EUR-E Cyprus EUR-F Egypt EUR-G England;...
  • Page 59 SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 IND-P Pakistan INF-A Thailand ING-B Vietnam (Con Son Island) ING-A Vietnam (Near 16øN) INH- Thailand Indonesia Ireland South Georgia Islands Diego Garcia Johnston Island Sri Lanka Kerguelen Island West Malaysia & Singapore...
  • Page 60 SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 NAS-U Greenland (Hayes Peninsula) MEAN FOR Antigua; Barbados; Barnuda; Caicos Islands; Cuba; Dominican NAS-P Republic; Grand Cayman; Jamaica; Turks Islands NAS-N MEAN FOR Belize; Costa Rica; El Salvador; Guatemala; Honduras; Nicaragua NAS-E...
  • Page 61 SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 PRP-G Peru PRP-H Venezuela Chile (Near 53øS) (Hito XVIII) Puerto Rico; Virgin Islands Russia Qatar Greenland (South) Mascarene Islands EUR-I Italy (Sardinia) SPK-A Hungary SPK-B Poland SPK-C Czechoslovakia SPK-D Latvia SPK-E Kazakhstan...
  • Page 62 SE867-AGPS User Guide 1VV0300860 Rev. 0 - 2009-10-23 Algeria Wake Atoll Marshall Islands WGS72 Global Definition Uruguay Suriname Reserved Finland Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 62 of 62...

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