High Performance Receiver µ-blox Zuercherstrasse CH-8800 Thalwil

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High Performance Receiver µ-blox Zuercherstrasse CH-8800 Thalwil

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High Performance Receiver
µ-blox Zuercherstrasse CH-8800 Thalwil Switzerland Phone www.u-blox.com
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µ-blox
Title Type Author Date
DATASHEET GPS.G2-PS2-01009-A1 Aug.
most recent documents, please visit www.u-blox.com
reserve rights this document information contained therein. Reproduction, disclosure third parties without express authority strictly forbidden.
trademarks mentioned this document property their respective owners. SiRF SiRF logo registered trademarks SiRF Technology, Inc. SiRF Powered, SiRFstar, SiRFLoc, SiRFDRive, SiRFNav, SiRFWare, SingleSat, SnapLock, SnapStart, FoliageLock, Push-to-Fix, TricklePower WinSiRF trademarks SiRF Technology, Inc.
Copyright 2001, µ-blox
THIS DOCUMENT CONTAINS INFORMATION µ-blox PRODUCTS SAMPLING INITIAL PRODUCTION PHASES DEVELOPMENT. SPECIFICATIONS THIS DOCUMENT SUBJECT CHANGE µ-blox' DISCRETION. µ-blox ASSUMES RESPONSIBILITY CLAIMS DAMAGES ARISING THIS DOCUMENT, FROM MODULES BASED THIS DOCUMENT, INCLUDING LIMITED CLAIMS DAMAGES BASED INFRINGEMENT PATENTS, COPYRIGHTS OTHER INTELLECTUAL PROPERTY RIGHTS. µ-blox MAKES WARRANTIES, EITHER EXPRESSED IMPLIED WITH RESPECT INFORMATION SPECIFICATIONS CONTAINED THIS DOCUMENT. PERFORMANCE CHARACTERISTICS LISTED THIS DOCUMENT ESTIMATES ONLY CONSTITUTE WARRANTY GUARANTEE PRODUCT PERFORMANCE.
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CONTENTS
Overview Features Performance Specification.5
accuracy Start-up times
Operating Modes
Continuous Mode TricklePowerMode Push-to-FixMode.
Mechanical Dimensions External Interfaces
Description Serial Interface Signals Special Power Pins. 6.1.1 6.1.2 6.1.3
connector.
Electrical Specifications.9
Absolute Maximum Ratings Operating Conditions
External Wiring minimal Configuration.10 Active Antenna Supervisor
Product Lineup
10.1 10.2 Default startup Firmware Updates Customized Configurations.10
Related Documents.11 Glossary Contact.11
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OVERVIEW
Antenna Input XTAL 1PPS Serial Port Serial Port GSP2e Signal Processor Reset GPS-Data Clock GRF2i Front-End Filter
XTAL Antenna Power Power Backup Battery
Address
Data
FLASH 8MBit
Figure 1-1: Block diagram
receiver fully self-contained receiver module Global Positioning System (GPS). module provides complete signal processing from antenna input serial data output (NMEA SiRF proprietary data format). second serial port accepts differential data (RTCM). Based SiRFstarII chip manufactured SiRF Technology, Inc., module supports features, maintains technical specifications SiRFstar architecture. This architecture offers outstanding time-to-first figure. operates nominal voltage Volts. implementation patent pending TricklePowerMode allows additional drastic reduction power consumption applications where power consumption primary concern. featuring GRF2 front-end chip integrated Low-Noise Amplifier (LNA) connects seamlessly low-cost passive antennas well active antennas. antenna bias voltage supply active antennas integrated. contains completely shielded receiver part.
FEATURES
Fully self-contained receiver (PVT output) Fully shielded Size
Full implementation SiRFstar architecture: GRF2i Low-power front-end GSP2e Low-power with integrated Real Time Clock (RTC) Core MBit FLASH memory Noise Amplifier Filter, Crystals, etc.
Differential (RTCM-SC104) input Battery backup internal voltage supply Passive active antenna support Internal antenna bias voltage supply Operating voltage ±0.25V Advanced power modes Active antenna supervisor Industrial operating temperature range -40.85°C
Fast time-to-first-fix
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PERFORMANCE SPECIFICATION
accuracy
receiver accuracy function receiver performance, satellite visibility antenna, satellite constellation Selective Availability (SA). accuracy properly defined. Every manufacturer uses means defining, measuring calculating position accuracy. 2000 president decided discontinue with immediate effect. This improves accuracy dramatically without modification receivers. Navigation Performance Application Note more details static dynamic performance characteristics.
Start-up times
receiver different start-up scenarios, which differ significantly Time-to-first-fix (TTFF). These start-up scenarios depend amount knowledge receiver regarding position availability satellites. Just like accuracy, startup times receivers another field where every manufacturer naming scheme, therefore, comparison between receivers difficult. following short introduction definitions start-up times (see Table specifications) given. Please note that these numbers were measured with good visibility (open view sky). Obstructed view will result longer start-up times. Definitions: Cold Start Cold Start scenario, receiver knowledge last position, approximate time satellite constellation. receiver starts search signals blindly. This standard behavior, backup battery connected. Cold Start time longest startup time u-blox receivers. Warm Start Warm Start scenario, receiver knows backup battery last position, approximate time almanac. Thanks this, quickly acquire satellites position faster than cold start mode. Start Scenario, receiver- with backup battery less than hours. uses last Ephemeris data calculate position fix. reacquisition figure gives time required lock satellite signal been blocked short time (e.g. buildings). This most important urban areas. Reacquisition time related with TTFF.
Start Reacquisition
Parameter Receiver Type Up-date Rate Accuracy off) Accuracy (DGPS, off) Acquisition (typical)
Specification frequency, Code, 12-Channel Position Position Cold Start Warm Start Start (See
(see (typical) (typical) (typical) COCOM restrictions apply
Signal Reacquisition Dynamics Operational Limits
Circular Error Probability: radius horizontal circle, centered antenna's true position, containing fixes. Depends accuracy DGPS system
Table 3-1: receiver specifications
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OPERATING MODES
receiver operated different operating modes described below.
Continuous Mode
Continuous Mode, module runs continuously long operating voltage supplied. Position fixes generated maximum update rate. external backup battery recommended reduce system's startup time. external backup battery connected module keeps internal real time clock (RTC) running holds SRAM data (ephemeris almanac data) during power supply interruption. This enables warm- hot-start. However, under good visibility conditions cold- warm start times differ significantly.
TricklePower
Mode
TricklePower Mode, continuously supplied module. software configurable internal timer periodically forces module acquire position fix. Between fixes, module remains ultra-low power sleep mode. This mode recommended applications where lowest power consumption periodical position up-date primary concern. backup battery must connected enable module reduce startup times when recovering from supply interruption.
During TricklePower mode firmware periodically schedules ephemeris collection calibration ensure that useable data always available. Ephemeris collection occurs typically once within minutes period also whenever satellite rises above horizon. power-on scenario TricklePower Mode differs from Continuous Mode. module fails acquire enough satellites within given time (due visibility very signal levels) module goes into extended sleep phase. MaxOffTime defines length this sleep time. After this period module wakes tries acquire position again.
more detailed information TricklePower Mode please check Power Mode Application Note [2].
Push-to-FixMode
Push-to-FixMode puts receiver into background duty cycle mode that provides periodic refresh position, time, ephemeris data calibration. receiver stays sleep mode until either external reset expiration Push-to-Fix-Period wakes position update. Ephemeris data automatically updated whenever necessary. time first stays under seconds receiver performed successful position last cycle (i.e. within last ephemeris update phase).
more detailed information Push-to-Fix Mode please check Power Mode Application Note [2].
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MECHANICAL DIMENSIONS
dimensions Those rectangular brackets inches.
Figure 5-1: Mechanical dimensions assignment
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EXTERNAL INTERFACES
Description
data connector (2x5), 2.54mm pitch header. Table describes identification. Name Vbat Meaning Battery backup voltage Supply Voltage Ground connected Serial Port One-pulse-per-second Ground Serial Port Serial Port Ground Input Output Input Output Input Input Input Input Input Leave open Serial Port Note
Table 6-1: identification
6.1.1 Serial Interface Signals
serial interface signals (Port TxA, RxA; Port only) operate 3.3V CMOS compatible signal levels. External line transceivers (e.g. MAX3232) necessary provide compatible signal levels.
Proprietary NMEA SiRF input messages available configure serial ports, particular baud rates. Details NMEA SiRF binary protocol messages summarized Protocol Specification [3].
Baud Rate 1200 2400 4800 9600 19200 38400 57600
Comments NMEA, suitable message only NMEA, suitable message only Must deactivate some messages avoid communication bottleneck loss information, e.g. NMEA: only Minimum recommended baud rate NMEA output standard configuration Minimum recommended baud rate SiRF Binary Protocol output Minimum recommended baud rate SiRF Binary Protocol output including development data tracking data. Highest baud rate
Table 6-2: Supported baud rates
6.1.2
one-pulse-per-second active-high signal output PPS. This signal 3.3V CMOS compatible.
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6.1.3 Special Power Pins
external backup battery connected Vbat enable operation SRAM backup allow warm starts after power supply interruption. Connect Vbat battery used. supercaps recommended.
connector
connector right angle OSX. Antennas with plugs seamlessly connected connector.
ELECTRICAL SPECIFICATIONS
Absolute Maximum Ratings
Parameter Power Supply Voltage Input Voltage Antenna Bias Current Storage Temperature Table 7-1: Absolute Maximum Ratings Symbol Iant Tstg -0.3 -0.3 Units
Stressing device beyond "Absolute Maximum Ratings" cause permanent damage. These stress ratings only. protected against overvoltage reversed voltages. necessary, voltage spikes exceeding power supply voltage specification, given table above, must reduced using appropriate protection diodes.
Operating Conditions
Parameter (See Power Supply Voltage Power Supply Voltage Ripple Backup Battery Voltage Antenna Bias Voltage (See Sustained Supply Current (See Peak Supply Current (See TricklePower (See
Symbol Vcc_PP Vbat Vbias Iccp Itps Ibat
Condition
4.75
5.25
Units
Iant 35mA Vbat 3.3V Vcc-0.5
5.25
Sleep Mode Supply Current
Standby Battery Current Antenna Bias Current (See Operating Temperature
Iant Topr
ambient temperature 25°C assumed. Operation beyond "Operating Conditions" recommended extended exposure beyond "Operating Conditions" affect device reliability. Roughly linear relationship between recognized voltage drop (Vcc-Vbias) drawn bias current (Iant) During highly active phases, peak level endure several hundred milliseconds. "Peak Supply Current" (Iccp) dimension your power supply circuit. "Average Supply Current" (Icc) battery capacity budget calculations. Icc, Iccp Itps figures based Iant current drawn active antenna, then increases Iant.
Table 7-2: Operating Conditions
Operation beyond "Operating Conditions" recommended extended exposure beyond "Operating Conditions" affect device reliability.
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EXTERNAL WIRING MINIMAL CONFIGURATION
following minimum outside connections provide allow basic operation TIM. Antenna connector used connect antenna receiver. Concerning passive antennas, please refer section Power Connect pins ground. Serial Interface Pins TxA, 3.3V CMOS compatible. need different voltage levels, appropriate level shifters, e.g. MAX3232 from Maxim equivalent order obtain RS232 compatible levels. Backup Battery Connect backup battery Vbat intend this feature. don't intend backup battery, connect this GND. 1PPS Signal one-pulse-per-second signal available use. Leave unused pins open, specified otherwise. That's all!
ACTIVE ANTENNA SUPERVISOR
active antenna supervisor provided which able detect report short open circuits. antenna supply will shut automatically when short circuit been detected remains until next reset. Passive antennas with open circuit result normal reception, open circuit reported. Passive antennas with short circuit result short circuit detection. Configuration parameters firmware available deactivate active antenna supply default. SiRF binary NMEA messages with status information about active antenna supervisor documented Protocol Specification [3]. Details functionality supervisor summarized application note active antenna supervisor [6].
PRODUCT LINEUP
10.1 Default startup
shipped with following default start-up configuration: Output port NMEA, activated messages: GLL, GGA, RMC, VTG, GSV, GSA, with checksum enabled (9600 baud bits parity stop bit) RTCM DGPS input port (RTCM messages (9600 baud bits parity stop bit)
10.2 Firmware Updates Customized Configurations
Different start-up configurations reflashing firmware with different default settings, e.g. SiRF® binary protocol port different update rates, data output serial port enable active antenna supervisor status message. Firmware Update Utility, described free tool available Evaluation downloadable from u-blox website. enables convenient downloads firmware modification configuration parameters described Protocol Specification [3].
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RELATED DOCUMENTS
Navigation Performance Application Note, GPS.G2-X-01001 Power Modes Application Note, GPS.G2-X-02003 Receiver Protocol Specification Application Note, GPS.G2-X-01003 Firmware Update Utility User's Manual, GPS.G2-SW-02004 Evaluation User's Guide, GPS-EK-01001 Active Antenna Supervisor Application Note, GPS-G2-X-02009 Dictionary, GPS-X-00001
these documents available homepage (http://www.u-blox.com).
GLOSSARY
Please refer Dictionary, [7].
CONTACT
further info, please contact Headquarters u-blox Zuercherstrasse CH-8800 Thalwil Switzerland Phone: Fax: E-mail: info@u-blox.com www.u-blox.com Subsidiaries u-blox Deutschland GmbH Berliner Ring D-64625 Bensheim Germany Phone: 6251 17566-0 Fax: 6251 17566-11 E-mail: info_de@u-blox.de www.u-blox.de Tech. Support: Phone: support_de@u-blox.de u-blox Asia Pacific Ltd. 22/F., City Landmark Chung Street Tsuen Wan, Hong Kong Phone: +852-2941-8877 Fax: +852-2615-2285 E-mail: info_ap@u-blox.com www.u-blox.com Tech. Support: Phone: support_ap@u-blox.com
u-blox Europe Ltd. Barham Court Maidstone, Kent ME18 United Kingdom Phone: 1622 618628 Fax: 1622 618629 E-mail: info_uk@u-blox.co.uk www.u-blox.co.uk Tech. Support: Phone: 1622 618628 support_uk@u-blox.co.uk
u-blox America, Inc. 13800 Coppermine Road Herndon, 20171 Phone: (703) 5290 Fax: (703) 5770 E-mail: info_us@u-blox.com www.u-blox.com Tech. Support: Phone: (703) 5290 support_us@u-blox.com
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