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REB-3571LP User Manual

Figure List ................................................................................................................................ II

Table List ................................................................................................................................. III

1 Introduction ..................................................................................................................... 4

1.1 Product applications ..................................................................................... 4

1.2 Product Picture.............................................................................................. 5

1.3 Gstar-89LP Series Block Diagram ................ ............................................. 7

1.4 Gstar-89LP Technique Specification............. ............................................ 8

1.5 Application Circuit......................................................................................... 9

1.6 Recommended layout PAD..........................................................................11

1.7 Mechanical Layout ...................................................................................... 12

1.8 Gstar-89LP-Test Software Specification......... ......................................... 12

1.9 Hardware interface ...................................................................................... 13

2 Software Interface ......................................................................................................... 17

2.1 NMEA V3.0 Protocol .................................................................................... 17

2.1.1 GGA-Global Positioning System Fixed Data ................................... 17

2.1.2 GLL-Geographic Position –Latitude/Longitude............................... 18

2.1.3 GSA-GNSS DOP and Active Satellites .............................................. 19

2.1.4 GSV-GNSS Satellites in View............................................................. 19

2.1.5 RMC-Recommended Minimum Specific GNSS Data ....................... 20

2.1.6 VTG-Course Over Ground and Ground Speed ................................ 21

3 GPS Receiver User’s Tip.............................................................................................. 22

3.1 Package Specification and Order Information ......................................... 23

3.2 Lead-Free Standard Reflow Profile............................................................ 23

4 Contact Information Section........................................................................................ 24

5 Revision History............................................................................................................ 24

Summary of content (23 pages)

PAGE 1
REB-3571LP User Manual Figure List ................................................................................................................................ II Table List ................................................................................................................................. III 1 2 Introduction ..................................................................................................................... 4 1.1 Product applications ..................................
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REB-3571LP User Manual Figure List Figure 1-1 Gstar-89LP Front View ................... ............................................................ 5 Figure 1-2 Gstar-89LP Interface Board Front View... ................................................. 5 Figure 1-3 Evaluation Kit Front View............................................................................. 7 Figure 1-4 System Block Diagram .................................................................................
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REB-3571LP User Manual Table List Table 1-1 The interface board pin definition................................................................. 5 Table 1-2 Technical Specifications ................................................................................ 8 Table 1-3 Definition of Pin assignment ....................................................................... 13 Table 2-1 NMEA-0183 Output Messages .....................................................................
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REB-3571LP User Manual 1 Introduction Gstar-GP S-GS-89.LP low power and small form factor board is the newest generation of RoyalTek GPS module. The module is powered by latest SiRF Star III single chip and RoyalTek proprietary navigation technology that provides you with stable and accurate navigation data. The smallest form factor and miniature design is the best choice to be embedded in a device such as portable navigation device, personal locator, speed camera detector and vehicle locator.
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1.2 Product Picture GstarGS-89 Pin16 Pin 15 Pin 30 Pin 1 Figure 1-1 GstarGS-89 Front View Figure 1-2 REB-3571LP Interface Board Front View Table 1-1 The interface board pin definition PIN 1 VCC V_GPS_3V3 VCC 2 GND GND GND 3 Bootselect Bootselect Bootselect 4 RXA RXA RXA 5 TXA TXA TXA 6 TXB TXB TXB 7 RXB RXB RXB 8 GPIO14 N.C.
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9 RF-ON RF-ON RF-ON 10 GND GND GND 11 GND N.C. GND 12 GND N.C. GND 13 GND GND GND 14 GND N.C. GND 15 GND GND GND 16 GND GND GND 17 RF-IN GPS_RF_IN RF-IN 18 GND GND GND 19 V-ANT V-ANT_IN V-ANT 20 VCC-RF VCC_RF_OUT VCC-RF 21 V-BAT V_RTC_3V3 V-BAT 22 RESET-IN RESET RESET-IN 23 GPIO10 N.C. GPIO10 24 GPIO1 N.C. GPIO1 25 GPIO5 GPIO4 GPIO4 26 GPIO0 GPIO0 GPIO0 27 GPIO13 N.C. GPIO13 28 GPIO15 N.C.
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1.3 GstarGS-89 Series Block Diagram Gstar-GS89 engine board consists of SiRF star III singl e chipset technology; 4Mbits flash memory, and proprietary software. The system is described as follows. a. External antenna. b. 4 Mega bits flash memory c.
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REB-3571LP User Manual 1.4 GstarGS-89 Technique Specification Impedance：：50Ω Ω Table 1-2 Technical Specifications No Function Specification GPS receiver 1 Chipset 2 Frequency SiRF Star III, GSC3f/LP (Digital, RF in a single package) L1 1575.42MHz. 3 Code C.A. Code. 4 Channels 20 parallel 5 Sensitivity (Acquisition) It shall show C/No ≧ 40 dB-Hz when external power = -130dBm.
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REB-3571LP User Manual 1.5 Application Circuit J1 RF MCX JACK 5 3 4 R1 0 ohm R2 0 ohm 1 50 ohm Trace C1 OPEN 2 C2 OPEN +3.3V +3.3V U1 R7 0 ohm RF_IN R8 C7 0.1uF/X5R/16V OPEN V_RTC_3V3 RESET GPS_IO10 GPS_IO1 GPS_IO4 GPS_IO0 GPS_IO13 GPS_IO15 GPS_PPS +3.3V_BAT (Alway s) 1 3 C4 10uF /10V /Y 5V 2 D1 RB705D U2 3V 3.
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increase power stability. (6) Active antenna bias voltage: The VCC_RF_OUT pin (pin 20) is provide voltage 2.85V. If you use active antenna, you can connect this pin to V_ANT_IN pin (pin 19) to provide bias voltage of active antenna. The bias voltage will be through GPS_RF_IN pin to provide active antenna bias voltage from Vcc_RF_OUT pin. If your bias voltage of active antenna isn’t 2.85V, you can input bias voltage to V_ANT_IN pin (pin 19).And input bias voltage of you need.
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REB-3571LP User Manual 1.
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REB-3571LP User Manual 1.7 Mechanical Layout Figure 1-8 Mechanical Layout 1.8 GstarGS-89-Test Software Specification No Function Specification 1 Clock offset 88000Hz≦量測值≦104000Hz 2 Clock Drift 量測值≦200Hz 3 C/No Hi Power Mean 量測值≧39dB 4 C/No Hi Power Sigma 量測值≦2dB 5 Bit Sync 量測值≦5 Sec 6 Frame Sync 量測值≦28 Sec 7 Phase Error 量測值≦0.22 8 RTC 測試 RTC Frequency 測試 31000≦量測值≦33500 可靠性及品質目標 MTBF > 10000 hours.
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REB-3571LP User Manual 1.9 Hardware interface Figure 1-9 Hardware Interface Table 1-3 Definition of Pin assignment Pin Signal Name I/O Description Characteristics I DC +3.3V±5% # 1 VCC_3V3 DC Supply Voltage input 2 GND G Ground Reference Ground 3 Bootselect I Boot mode 3.15V ≥ VIH ≥ 2.0V - 0.3V ≤ VIL ≤ 0.86V 4 RXA I Serial port A 5 TXA O Serial port A 3.15V ≥ VIH ≥ 2.0V 2.85V ≥ VOH ≥ 2.14V - 0.3V ≤ VIL ≤ 0.86V VOL ≤ 0.71V 6 TXB O Serial port B 2.85V ≥ VOH ≥ 2.
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REB-3571LP User Manual 12 GND G Ground Reference Ground 13 GND G Ground Reference Ground 14 GND G Ground Reference Ground 15 GND G Ground Reference Ground 16 GND G Ground Reference Ground 17 RF_IN I GPS Signal 50 Ω @1.57542GHz input 18 GND G Ground Reference Ground 19 V_ANT_IN I Active Receiving DC power supply for active antenna Antenna Bias bias. voltage 20 VCC_RF_OUT O Supply DC +2.85V ±2% Antenna Bias Current<30mA voltage 21 V_RTC_3V3 I Backup DC + 2.5 ~ +3.
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REB-3571LP User Manual This is the DC power supply input pin for GPS system. It provides voltage to module. ．GND GND provides the ground . ．Boot Set this pin to high for programming flash. ．RXA This is the main receiver channel and is used to receive software commands to the board from SIRFdemo software or from user written software. ．RXB This is the auxiliary receiving channel and is used to input differential corrections to the board to enable DGPS navigation.
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REB-3571LP User Manual This is the battery backup input that powers the SRAM and RTC when main power is removed. Typical current draw is 10uA. The supply voltage should be between 2.5V and 3.6V. ．GPIO Functions Several I/Os are connected to the digital interface connector for custom applications.
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REB-3571LP User Manual 2 Software Interface 2.1 NMEA V3.0 Protocol Its output signal level is TTL: 4800 bps (default), 8 bit data, 1 stop bit and no parity. It supports the following NMEA-0183 Messages: GGA, GLL, GSA, GSV, RMC and VTG.
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Geoid Separation meters Units M meters Age of Diff. Corr. second Null fields when DGPS is not used Diff. Ref. Station ID 0000 Checksum *18 ＜CR＞＜LF＞ End of message termination Table 2-3 Position Fix Indicators Value Description 0 Fix not available or invalid 1 GPS SPS Mode, fix valid 2 Differential GPS, SPS Mode, fix valid 3-5 6 Not Supported GPS PPS Mode, fix valid Dead Reckoning Mode, fix valid 2.1.
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REB-3571LP User Manual 2.1.3 GSA-GNSS DOP and Active Satellites Table 2-5 contains the values of the following example: $GPGSA, A, 3, 07, 02, 26, 27, 09, 04, 15, , , , , , 1.8,1.0,1.5*33 Table 2-5 GSA Data Format Name Example Message ID $GPGSA Units Description GSA protocol header Mode 1 A See Table 4-2 Mode 2 3 See Table 4-1 Satellite Used 07 Sv on Channel 1 Satellite Used 02 Sv on Channel 2 …. …. Satellite Used Sv on Channel 12 PDOP 1.8 Position Dilution of Precision HDOP 1.
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REB-3571LP User Manual Table 2-8 GGA Data Format Name Example Message ID $GPGSV Number of Messages Units Description GSV protocol header 2 Range 1 to 3 1 Range 1 to 3 1 Messages Number 1 Satellites in View 07 Satellite ID 07 Elevation 79 degrees Channel 1(Maximum 90) Azimuth 048 degrees Channel 1(True, Range 0 to 359) SNR (C/No) 42 Channel 1(Range 1 to 32) dBHz Range 0 to 99, null when not tracking …. ….
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Course Over 309.62 degrees True Ground Date 120598 Magnetic Variation Mode ddmmyy degrees A Checksum E=east or W=west A=Autonomous, D=DGPS, E=DR *10 2.1.6 VTG-Course Over Ground and Ground Speed Table 2-10 contains the values of the following example: $GPVTG, 309.62, T, , M, 0.13, N, 0.2, K*6E Table 2-10 VTG Data Format Name Message ID Course Reference Example $GPVTG 309.
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REB-3571LP Operational Manual 3 GPS Receiver User’s Tip A. GPS signal will be affected by weather and environment conditions, thus suggest to use the GPS receiver under less shielding environments to ensure GPS receiver has better receiving performance. B. When GPS receiver is moving, it will prolong the time to fix the position, so suggest to wait for the satellite signals to be locked at a fixed point when first power-on the GPS receiver to ensure to lock the GPS signal at the shortest time. C.
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3.1 Package Specification and Order Information Shipment Method: Tape and reel Figure 3-1 Package Specifications 3.