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Globalsat EB-3531 User Manual

Gps engine board
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Globalsat Technology Corporation
16F., No. 186, Jian-Yi Road, Chung-Ho City, Taipei Hsien 235, Taiwan
Tel: 886-2-8226-3799/ Fax: 886-2-8226-3899
service@globalsat.com.tw
www.globalsat.com.tw
EB-3531
GPS Engine Board
EB-3531
Page 1 of 21
USGlobalSat, Inc.
14740 Yorba Court, Chino, CA 91710
Tel: 909.597.8525 / Fax: 909.597.8532
oem@usglobalsat.com
www.usglobalsat.com
Specifications are subject to be changed without notice.
Version 1.2.1

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  • Page 1 EB-3531 Version 1.2.1 GPS Engine Board EB-3531 Globalsat Technology Corporation USGlobalSat, Inc. 16F., No. 186, Jian-Yi Road, Chung-Ho City, Taipei Hsien 235, Taiwan 14740 Yorba Court, Chino, CA 91710 Tel: 886-2-8226-3799/ Fax: 886-2-8226-3899 Tel: 909.597.8525 / Fax: 909.597.8532 service@globalsat.com.tw oem@usglobalsat.com www.globalsat.com.tw...

  • Page 2: Product Information

    SiRF Star III chipset, which can track up to 20 satellites at a time and perform fast TTFF (time to first fix) in weak signal environments. The EB-3531 is ideal for automotive or marine navigation, personal positioning, fleet management, and mobile-phone navigation.
  • Page 3 EB-3531 Version 1.2.1 Channels Flash 4Mbit Sensitivity Tracking:-159dBm Cold Start 42 seconds, average Warm Start 38 seconds, average Hot Start 1 second, average Reacquisition 0.1 second, average Accuracy Position: 10 meters, 2D RMS 5 meters, 2D RMS, WAAS enabled Velocity: 0.1 m/s...

  • Page 4: Technical Information

    EB-3531 Version 1.2.1 2. Technical Information Block Diagram Module Pin Assignment Specifications are subject to be changed without notice. Page 4 of 21...
  • Page 5 EB-3531 Version 1.2.1 Pin NO. Pin Name Remark Serial input (default null) Serial output (default null) TIMEMARK One pulse per second. Serial output (default NMEA) Serial input (default NMEA) GPIO0 General purpose I/O GPIO1 General purpose I/O RF_PWR RF Power ON/OFF.

  • Page 6: Application Circuit

    EB-3531 Version 1.2.1 Application Circuit GPS_ANTENNA RF_IN BLM18AG121SN1D 1PPS VCC_RF BOOTSEL BLM18AG121SN1D EB-3531 GPIO15 GPIO0 GPIO14 GPS_3V3 GPIO1 GPIO13 RF_PWR ON_OFF VBAT GPS_3V3 10UF RB521S 0.1UF 270R RB512S BATTERY MS518S-FL35E G P S P O W E R GPS_3V3 VOUT BLM18AG121SN1D XC6209B332MRN 3.3V...

  • Page 7: Recommend Layout Pad

    EB-3531 Version 1.2.1 Dimensions Recommend Layout PAD Tolerances: ±0.1mm Specifications are subject to be changed without notice. Page 7 of 21...

  • Page 8: Application Guideline

    EB-3531 Version 1.2.1 Application Guideline Application Circuit RF Switch 50 Ohm Micro strip line 24-20003-12030N RF_IN BLM18AG121SN1D 1PPS 50 Ohm Micro VCC_RF strip line BOOTSEL BLM18AG121SN1D J1_I-PEX connect EB-3531 GPIO15 External antenna GPIO0 GPIO14 GPS_3V3 GPIO1 GPIO13 RF_PWR ON_OFF VBAT...
  • Page 9 EB-3531 Version 1.2.1 Layout Rules Do not route the other signal or power trace under the engine board. * RF: This pin receives signal of GPS analog via external active antenna. It has to be a controlled impedance trace at 50ohm.
  • Page 10 EB-3531 Version 1.2.1 Design Notes VCC: This is the main power supply to the engine board. (3.3Vdc ± 5%). GND: Ground pin for the baseband circuit. RXA: This is the main channel for receiving software commands from SiRFdemo software or from your proprietary software.

  • Page 11: Pin Assignment

    EB-3531 Version 1.2.1 Demo Kit Test Description Connect J2 of the demo kit (Male) to J5 of the Test Board (Female) as the diagram below. Pin Assignment Specifications are subject to be changed without notice. Page 11 of 21...
  • Page 12 EB-3531 Version 1.2.1 Signal Name Signal Name Signal Name Signal Name TIMEMARK VCC_RF GPIO15 GPIO0 GPIO14 GPIO1 GPIO13 RF_PWR JP1: VBAT Specifications are subject to be changed without notice. Page 12 of 21...

  • Page 13: Software Commands

    EB-3531 Version 1.2.1 Test Software (GPSinfo) 1. Select COM Port & Baud Rate 2. Press Start GPS 3. Software Commands NMEA Output Command GGA-Global Positioning System Fixed Data Table B-2 contains the values for the following example: $GPGGA,161229.487,3723.2475,N,12158.3416,W,1,07,1.0,9.0,M,,,,0000*18 Table B-2 GGA Data Format...
  • Page 14 EB-3531 Version 1.2.1 Longitude 12158.3416 dddmm.mmmm E/W Indicator E=east or W=west Position Fix Indicator See Table B-3 Satellites Used Range 0 to 12 HDOP Horizontal Dilution of Precision MSL Altitude meters Units meters Geoid Separation meters Units meters Age of Diff. Corr.
  • Page 15 EB-3531 Version 1.2.1 Table B-5 contains the values for the following example: $GPGSA,A,3,07,02,26,27,09,04,15,,,,,,1.8,1.0,1.5*33 Table B-5 GSA Data Format Name Example Units Description Message ID $GPGSA GSA protocol header Mode1 See Table B-6 Mode2 See Table B-7 Satellite Used Sv on Channel 1...
  • Page 16 EB-3531 Version 1.2.1 Satellites in View Satellite ID Channel 1(Range 1 to 32) Elevation degrees Channel 1(Maximum90) Azimuth degrees Channel 1(True, Range 0 to 35 SNR(C/No) dBHz Range 0 to 99,null when not tra ……. ……. Satellite ID Channel 4 (Range 1 to 32)
  • Page 17 EB-3531 Version 1.2.1 Course 309.62 degrees Measured heading Reference True Course degrees Measured heading Reference Magnetic Speed 0.13 knots Measured horizontal speed Units Knots Speed Km/hr Measured horizontal speed Units Kilometers per hour Checksum <CR><LF> End of message termination ■ NMEA Input Command A.) Set Serial Port ID:100...
  • Page 18 EB-3531 Version 1.2.1 (0-9,A-F) for transmission. First, the most significant character is transmitted. **<CR><LF> : Hex 0D 0A B.) Navigation initialization ID:101 Parameters required for start This command is used to initialize the GPS module for a “Warm” start, by providing real-time position （in X, Y, Z coordinates), clock offset, and time.
  • Page 19 EB-3531 Version 1.2.1 This command is used to control Serial Port B, an input serial only port used to receive RTCM differential corrections. Differential receivers may output corrections using different communication parameters. The default communication parameters for PORT B are set for 9600 Baud, 8data bits, 0 stop bits, and no parity.
  • Page 20 EB-3531 Version 1.2.1 acquired and stored satellite data will enable the receiver to acquire signals more quickly, and thus, generate a rapid navigational solution. When a valid LLA Navigation Initialization command is receive, then the receiver will restart using the input parameters as a basis for satellite selection and acquisition.
  • Page 21 EB-3531 Version 1.2.1 Example: Debug Off $PSRF105,0*3F G). Select Datum ID:106 Selection of datum to be used for coordinate transformations GPS receivers perform initial position and velocity calculations using an earth-centered earth-fixed (ECEF) coordinate system. Results may be converted to an earth model (geoid) defined by the selected datum.

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