MTK GPS-U1-GPS module

GR9804-DS000B 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. GlobalTop Technology Inc.  Gmm‐u1                          GPS  Module  Data Sheet  Revision: V0B  D at a Sh ee t The Gmm-u1 is a stand-alone GPS module with ultra-high sensitivity (- 165dBm) in an ultra-slim form factor (13*10*2.1mm), while utilizing the latest in MediaTek GPS solution. 2 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. Title GlobalTop Gmm-u1 Datasheet Subtitle GPS Module Doc Type Datasheet Doc Id GR9804-DS000B Revision Date Author Description V0A 2009-10-1 Yingjie First Release V0B 2009-10-28 Delano Add Reflow Thermal Profile 3 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. Table of Contents 1. Functional Description ................................................................................................. 4 1.1 Overview............................................................................................................. 4 1.2 Highlights and Features...................................................................................... 5 1.3 System Block Diagram ....................................................................................... 6 2. Specifications................................................................................................................ 7 2.1 Pin Assignment ................................................................................................... 9 2.2 Description of I/O Pin........................................................................................ 10 2.3 Specification List ............................................................................................... 13 2.4 Absolute Maximum Ratings .............................................................................. 14 2.5 Operating Conditions ........................................................................................ 14 3. Protocols...................................................................................................................... 15 4. Application................................................................................................................... 21 4.1 Description........................................................................................................ 21 4.2 Reference Design Circuit .................................................................................. 21 5. Reflow Soldering Temperature Profile ...................................................................... 23 5.1 SMT Reflow Soldering Temperature Profile: ..................................................... 23 5.2 Manual Soldering:............................................................................................. 24 6. Contact ......................................................................................................................... 25 4 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. 1. Functional Description 1.1 Overview The GlobalTop Gmm-u1 is a high sensitivity, low power and ultra-slim GPS module. Gmm-u1 can support up to 66 channels of satellite searching. Even at high speed vehicle movement, Gmm-u1 has special function to provide maximum update rate 10Hz to give customers more precise position fix and vehicle velocity. It delivers major advancements in GPS performances, accuracy, integration, power consumption and flexibility. It is designed to be suitable for embedded system integration and simplifies the design procedure by module structure. Gmm- u1 module is the best choice for integrating GPS function into system design. Application ˇ AVL ˇ Personal tracker ˇ Bike computer ˇ Mobile phone ˇ PND 5 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. 1.2 Highlights and Features ‹ Ultra-high sensitivity, -165dBm1 ‹ L1 Frequency, C/A code, 66-channels satellite searching ‹ AGPS support for fast positioning (offline mode: EPO valid up to 14 days) ‹ DGPS(WAAS/EGNOS/MSAS/GAGAN) support ‹ Multi-path detection and compensation ‹ E-GSM-900 band rejection ‹ E911 compliance ‹ USB Interface support ‹ High update rate, up to 10Hz (configurable by firmware) ‹ Magnetic Variation function support (configurable by Gtop customized firmware ) ‹ Low power consumption, 48mA acquisition, 37mA tracking ‹ Low shut-down current consumption, 20uA typical ‹ Ultra-slim form factor, 13*10*2.1mm ‹ RoHS compliant 1 Reference to GPS chipset specification 6 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. 1.3 System Block Diagram 7 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. 2. Specifications Unit: mm Mechanical Top View 8 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. Unit: mm Recommend PCB pad Layout Footprint (Top View) 9 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. 2.1 Pin Assignment Pin Name I/O Description & Note 1 ENABLE I Keep open or pull high to Power ON 2 VCC PI Main DC power input 3 GND P Ground 4 N_Reset I Reset Input, Low Active 5 VBACKUP PI Backup power input for RTC & navigation data keep 6 GND P Ground 7 DP I/O USB port D+ 8 DM I/O USB port D- 9 RTCM I Serial Data Input for DGPS RTCM data streaming 10 TXDA O Serial Data Output for NMEA output 11 RXDA I Serial Data Input for Firmware update 12 GND P Ground 13 3D_FIX O 3D-fix indicator 14 1PPS O 1PPS Time Mark Output 2.8V CMOS Level 15 GND P Ground 16 RF_IN I Antenna Signal Input 10 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. 2.2 Description of I/O Pin ENABLE, Pin1 Keep open or pull high to Power ON. Pull low to shutdown the module. Enable (High): 1.6V<= Venable<=VCC Disable (Low): 0V<= Venable<=0.3V VCC, Pin2 The main DC power supply for the module. The voltage should be kept between from 3.3V to 5.5V. The ripple must be controlled under 50mVpp (Typical: 3.3V) GND, Pin3 Ground N_Reset, Pin4 Low active, it causes the module to reset. If not used, keep floating VBACKUP, Pin5 This is the power for GPS chipset to keep RTC running when main power is removed. The voltage should be kept between 2.0V~4.0V, Typical 3.0V The pin must be wired to power supply for normal operation 11 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. GND, Pin6 Ground DP, Pin7 USB Port DPLUS signal (Differential Signal + ) DM, Pin8 USB Port DMINUS signal (Differential Signal － ) RTCM, Pin9 This pin receive DGPS data of RTCM protocol (TTL level) ,if not used keep floating TXDA, Pin10 This is the UART transmitter of the module. It outputs the GPS information for application RXDA, Pin11 This is the UART receiver of the module. It is used to receive commands from system GND, Pin12 Ground 12 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. 3D-FIX, Pin13 The 3D-FIX was assigned as fix flag output. If not used, keep floating „ Before 2D Fix The pin should continuously output one-second high-level with one-second low-level signal „ After 2D or 3D Fix The pin should continuously output low-level signal 1PPS, Pin14 This pin provides one pulse-per-second output from the module, which is synchronized to GPS time. If not used, keep floating; default duration 100ms GND, Pin15 Ground RF_IN, Pin16 GPS RF signal input. Patch；If used to external active antenna, which is the power supply from external DC voltage. The voltage should be kept between 3.0V~4.0V, Typical 3.0V 1s 1s Low 13 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. 2.3 Specification List Parameter Description GPS Solution MTK MT3329 Frequency L1, 1575.42MHz Sensitivity1 Acquisition -148dBm, cold start Reacquisition -160dBm Tracking -165dBm Channel 66 channels TTFF1 Hot start: 1 second typical Warm start: 33 seconds typical Cold start: 35 seconds typical Altitude Maximum 18,000m (60,000 feet) Velocity Maximum 515m/s (1000 knots) Acceleration Maximum 4G Update Rate 1Hz (default), maximum 10Hz Baud Rate 9600 bps (default) DGPS RTCM protocol / SBAS(defult) [WAAS, EGNOS, MSAS,GAGAN] AGPS Support Power Supply VCC：3.3V to 5.5V；VBACKUP：2.0V to 4.0V Current Consumption 48mA acquisition, 37mA tracking Shut-down current consumption 20uA typical Working Temperature -40 ℃ to +85 ℃ Dimension 13x10x2.1m, SMD Weight 0.5g 1 Reference to GPS chipset specification 14 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. 2.4 Absolute Maximum Ratings The voltage applied for VCC should not exceed 6VDC; Parameter Symbol Min. Typ. Max. Unit Power Supply Voltage VCC － 3.3 5.5 V Backup battery Voltage VBACKUP 2.0 3.0 4.0 V 2.5 Operating Conditions Parameter Condition Min. Typ. Max. Unit Operation supply Ripple Voltage － － － 50 mVpp RX0 TTL H Level VCC=3.3V 2.1 － VCC V RX0 TTL L Level VCC=3.3V 0 － 0.9 V TX0 TTL H Level VCC=3.3V 2.1 － 2.8 V TX0 TTL L Level VCC=3.3V 0 － 0.8 V RTCM TTL H Level VCC=3.3V 2.1 － VCC V USB D+ Standard － － － V USB D- Standard － － － V RTCM TTL L Level VCC=3.3V 0 － 0.9 V Acquisition 43 48 53 mA Current Consumption @ 3.3V Tracking 32 37 42 mA Backup Power Consumption@ 3.0V 25℃ － 20 － uA 15 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. 3. Protocols NMEA Output Sentence Table-1 lists each of the NMEA output sentences specifically developed and defined by MTK for use within MTK products Table-1: NMEA Output Sentence Option Description GGA Time, position and fix type data. GSA GPS receiver operating mode, active satellites used in the position solution and DOP values. GSV The number of GPS satellites in view satellite ID numbers, elevation, azimuth, and SNR values. RMC Time, date, position, course and speed data. Recommended Minimum Navigation Information. VTG Course and speed information relative to the ground. 16 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. GGA—Global Positioning System Fixed Data. Time, Position and fix related data Table-2 contains the values for the following example： $GPGGA,064951.000,2307.1256,N,12016.4438,E,1,8,0.95,39.9,M,17.8,M,,*65 Table-2: GGA Data Format Name Example Units Description Message ID $GPGGA GGA protocol header UTC Time 064951.000 hhmmss.sss Latitude 2307.1256 ddmm.mmmm N/S Indicator N N=north or S=south Longitude 12016.4438 dddmm.mmmm E/W Indicator E E=east or W=west Position Fix Indicator 1 See Table-3 Satellites Used 8 Range 0 to 14 HDOP 0.95 Horizontal Dilution of Precision MSL Altitude 39.9 meters Antenna Altitude above/below mean-sae-level Units M meters Units of antenna altitude Geoidal Separation 17.8 meters Units M meters Units of geoid separation Age of Diff. Corr. second Null fields when DGPS is not used Checksum *65 End of message termination Table-3: Position Fix Indicator Value Description 0 Fix not available 1 GPS fix 2 Differential GPS fix 17 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. GSA—GNSS DOP and Active Satellites Table-4 contains the values for the following example： $GPGSA,A,3,29,21,26,15,18,09,06,10,,,,,2.32,0.95,2.11*00 Table-4: GSA Data Format Name Example Units Description Message ID $GPGSA GSA protocol header Mode 1 A See Table-5 Mode 2 3 See Table-6 Satellite Used 29 SV on Channel 1 Satellite Used 21 SV on Channel 2 .... …. …. .... Satellite Used SV on Channel 12 PDOP 2.32 Position Dilution of Precision HDOP 0.95 Horizontal Dilution of Precision VDOP 2.11 Vertical Dilution of Precision Checksum *00 End of message termination Table-5: Mode 1 Value Description M Manual—forced to operate in 2D or 3D mode A 2D Automatic—allowed to automatically switch 2D/3D Table-6: Mode 2 Value Description 1 Fix not available 2 2D (＜4 SVs used) 3 3D (≧4 SVs used) 18 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. GSV—GNSS Satellites in View Table-7 contains the values for the following example： $GPGSV,3,1,09,29,36,029,42,21,46,314,43,26,44,020,43,15,21,321,39*7D $GPGSV,3,2,09,18,26,314,40,09,57,170,44,06,20,229,37,10,26,084,37*77 $GPGSV,3,3,09,07,,,26*73 Table-7: GSV Data Format Name Example Units Description Message ID $GPGSV GSV protocol header Number of Messages 3 Range 1 to 3 (Depending on the number of satellites tracked, multiple messages of GSV data may be required.) Message Number1 1 Range 1 to 3 Satellites in View 09 Satellite ID 29 Channel 1 (Range 1 to 32) Elevation 36 degrees Channel 1 (Maximum 90) Azimuth 029 degrees Channel 1 (True, Range 0 to 359) SNR (C/No) 42 dBHz Range 0 to 99, (null when not tracking) .... …. …. .... Satellite ID 15 Channel 4 (Range 1 to 32) Elevation 21 degrees Channel 4 (Maximum 90) Azimuth 321 degrees Channel 4 (True, Range 0 to 359) SNR (C/No) 39 dBHz Range 0 to 99, (null when not tracking) Checksum *7D End of message termination 19 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. RMC—Recommended Minimum Navigation Information Table-8 contains the values for the following example： $GPRMC,064951.000,A,2307.1256,N,12016.4438,E,0.03,165.48,260406,,,A*55 Table-8: RMC Data Format Name Example Units Description Message ID $GPRMC RMC protocol header UTC Time 064951.000 hhmmss.sss Status A A=data valid or V=data not valid Latitude 2307.1256 ddmm.mmmm N/S Indicator N N=north or S=south Longitude 12016.4438 dddmm.mmmm E/W Indicator E E=east or W=west Speed over Ground 0.03 knots Course over Ground 165.48 degrees True Date 260406 ddmmyy Magnetic Variation degrees E=east or W=west (Need GlobalTop Customization Service) Mode A A= Autonomous mode D= Differential mode E= Estimated mode Checksum *65 End of message termination 20 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. VTG—Course and speed information relative to the ground Table-9 contains the values for the following example: $GPVTG,165.48,T,,M,0.03,N,0.06,K,A*37 Table-9: VTG Data Format Name Example Units Description Message ID $GPVTG VTG protocol header Course 165.48 degrees Measured heading Reference T True Course degrees Measured heading Reference M Magnetic (Need GlobalTop Customization Service) Speed 0.03 knots Measured horizontal speed Units N Knots Speed 0.06 km/hr Measured horizontal speed Units K Kilometers per hour Mode A A= Autonomous mode D= Differential mode E= Estimated mode Checksum *06 End of message termination MTK NMEA Command Protocol Packet Type : 103 PMTK_CMD_COLD_START Packet Meaning: Cold Start：Don’t use Time, Position, Almanacs and Ephemeris data at re-start. Example: $PMTK103*30 21 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. 4. Application 4.1 Description This chapter introduces the reference schematic design for the best performance. 4.2 Reference Design Circuit Patch Antenna Application Notice: 1. Ferrite bead L1 was add for power noise reduction. 2. C1 and C2 decoupling capacitor should put near module. For C1, the value depends on system noise, range 1uF~100uF is reasonable. 3. Damping resistors R1, R2, R3, R4 and R5 should be fine-tuned for system application. 22