SIRF4导航模块规格书

ZYM-GA802-3 V4.0 GPS Engine Board User’s ManualTABLE OF CONTENTS1.Introduction (3)2.ESD handling precautions (4)3.Moisture Sensitivity Levels (4)4.Technical Futures (5)4.1.Electrical Characteristics (5)4.2.Environmental Characteristics (6)4.3.Physical Characteristics (6)5.Mechanical Dimensions and Electrical feature (6)5.1.GA802 outline:(mm) (6)5.2.Pin Description (6)5.3.Recommend PCB Layout (8)6.Reference Design (9)7.Reflow Profile (10)8.Software Protocol (11)9.Coordinate System and Manufacturing Default (15)8.1 Coordinate System (15)8.2 Manufacturing Default (15)1.I ntroductionZYM-GA802 is a high performance, low power consumption, small size, very easy integrated GPS engine board, based on the latest SiRFstarIV technology.Main Features:■Based on the latest SiRFstarIV■High sensitivity navigation engine (PVT) tracks as low as -163dBm■Cold Start 35s average■48 track verification channels■SBAS (WAAS)■Active Jammer Remover: Removes in-band jammers up to 80 dB-Hz.Tracks up to 8 CW jammers■GPS data updated through UART■Small active size: 12.4(W) x 16.4(D) x 2.7(H) mmBoard is illustrated in following figure：2. ESD handling precautionsThe ZYM-GA802-3 modules are Electrostatic Sensitive Devices(ESD).Observe precautions for handling! Failure to observe these precautions can result in severe Damage to the GPS modules.Unless there is a galvanic coupling between the local GND and the PCB GND,then the first point of contact when handling the PCB shall always be between the local GND and PCB GND.When soldering RF connectors and patch antennas to the receiver’s RF pin,make sure to use an ESD safe soldering iron.3. Moisture Sensitivity LevelsThe Moisture sensitivity levels(MSL) relates to the packaging and handing precautions required.The ZYM-GA802-3 is sensitive to moisture, rated at MSL level 3.For MSL standard see IPC/JEDEC J-STD-020.which can be downloaded from .4. Technical Futures4.1. Electrical Characteristics4.1.1 General1. Frequency：Tracking L1, C/A code.2. C/A code：1.023 MHz chip rate.3. Channels：484.1.2 Accuracy (Open Sky)1. Horizontal Position Accuracy(Autonomous)：<2.5 meters (50% 24hr Static,-130dBm).2. Velocity Accuracy: Speed <0.01m/s Heading<0.01°4.1.3 Datum1.Default：WGS-84.4.1.4 Time To First Fix (TTFF)1. Hot start：1 sec., average.2. Warm start：35 sec., average.3. Cold start：35 sec., average.4.1.5 Sensitivity (Autonomous)1. Acquisition: -148dBm2. Tracking: -163dBm3. Navigation: -160dBm4.1.6 Dynamic Conditions1. Altitude : <18,288 meters Max2. Velocity：515 m/s (<1,000 knots) Max3. Acceleration：4G, Max4.1.7 Power1. Power input：3.3V DC for main power and RTC power2. Input current: Less than 60mA (without antenna)3. RTC current: Less than 700uA4.1.8 Serial Port1. One full duplex serial communication, TTL interface, 4800 baud rate default ,with user selectable baud rate (9600 ,19200,38400,57600,115200)-User customized2. NMEA 0183 Version3.01 ASCII output4.2. Environmental Characteristics1. Operating temperature range -40 to +85℃℃2. Storage temperature range -45 to +85℃℃4.3. Physical Characteristics1. Active Size: 12.4(W) x 16.4(D) x 2.7(H) (mm)2. Weight: less than 2g5. Mechanical Dimensions and Electrical feature 5.1. Board outline: (mm) (Tolerance: ±0.2mm)BOTTOM VIEWTOP VIEWNC 1NC 21PPS 3VCC_0 9GND 10RF_IN 11GND 1213 GND14 NC20 TXA21 RXA22 VBAT23 VCC24 GNDNC 4NC 5NC 6NC 7NC 815 NC16 NC17 NC18 GPIO219 GPIO85.2.Pin Description :Table 5-1 is pin list of the 24-Pin Interface.Table 5-1PIN Name Type Description Electrical Characteristics1 NC2 NC3 1PPS O Time pulse output TTL；Voh≥2.4V；Vol≤0.4V；Iol=2mA4 NC5 NC6 NC7 NC8 NC9 VCC_O P VCC voltage output 3.0~3.6V10 GND P System ground11 RF_IN Antenna signal input ESD Sensitive!12 GND P System ground13 GND P System ground14 NC15 NC16 NC17 NC18 GPIO2 I/O General I/O Internal pull-down by 100K19 GPIO8 I/O General I/O Internal pull-down by 100K20 TXA O Navigation dataoutput or user defineTTL；Voh≥2.4V；Vol≤0.4V；Iol=2mA21 RXA I Serial data input oruser defineTTL；Voh≥2.4V；Vol≤0.4V；Iol=2mA22 VBAT P RTC&SRAM powersupplyDC：2.0V~5.0V Power forRTC23 VCC P System power DC：3.0V~3.6V24 GND P System ground! NOTICE:5.2.1 1PPS1．1PPS：Time pulse output. This pin provides the 1pps output desired for certain applications. This is a CMOS level output.5.2.2 UARTOne duplicate UART，TTL level.1．RXA: Input, mainly used for GPS control bit.2．TXA: Output, GPS data output.5.2.3 DC input Characters1．VCC: This is the main power supply. This pin contains an integrated +1.8V output LDO. The recommended operation condition is shown in the following table (Table 5-2).2．VBAT: Power for RTC and SRAM. This pin contains an integrated +1.8V output LDO. The recommended operation condition is shown in the following table (Table 5-2).Parameter Symbol Min. Typ. Max. UnitsMain power supply voltage VCC 3.0 3.3 3.6 VRTC supply and batteryVBAT 2.0 3.3 5.0 V backedSRAM supply(Table 5-2)3．VCC_O: Output pin, VCC output.4．Active antenna power supply instructions:There is no DC bias power output via RF_IN pin. Active antenna should be powered by external power.5. RF_IN: GPS signal input pin, active antenna is recommended.5.3. Recommend PCB Layout:5.3.1 Recommend pin layout (mm)（TOP VIEW）* General tolerances = ±0.2mm6．Reference Design7．Reflow ProfileRecommended soldering reflow profile for ZYM-GA802-3 mounting on PCB:! NOTICE:The equilibrium time can be adjusted to ensure the out gassing of the flux isoptimized. The equilibrium time can be increased if there is excessive voiding at PCB level.Consider for a long time in the soldering zone (with temperature higher than 180°C) has to be kept as short as possible to prevent component and substrate damages. Peak temperature must not exceed 250°C.! Important features of profile:Rise Speed=1~4˚C /sec, 25˚C to 150˚C equilibrium Preheating Temperature=140˚C to 150˚C, 60sec~90sec The ripple Temperature=225˚C to 250˚C, about 30sec Lower Speed=2~10˚C/sec, to 183˚C, about 15sec Total Time =about 300sec（℃）（）8. Software Protocol8.1 NMEA Transmitted MessageGPS engine board output NMEA-0183 V3.01 standard format message. The default communication parameters for NMEA output are 4800bps, 8 data bits, 1 stop bit, and no parity.Table 8-0 NMEA-0183 Output Messages8.1.1 Global Positioning System Fix Data (GGA)Samples:$GPGGA,002153.000,3342.6618,N,11751.3858,W,1,10,1.2,27.0,M,-34.2,M ,,0000*5ETable 8-1 GGA Data FormatTable 8-2 Position Fix Indicator8.1.2 Geographic Position - Latitude/Longitude (GLL)Samples:$GPGLL,3723.2475,N,12158.3416,W,161229.487,A,A*41Table 8-3 GLL Data Format8.1.3 GNSS DOP and Active Satellites (GSA)Samples:$GPGSA,A,3,07,02,26,27,09,04,15, , , , , ,1.8,1.0,1.5*33Table 8-4 GSA Data FormatNote : Satellite used in solution.Table 8-5 Mode 1Table 8-6 Mode 28.1.4 GNSS Satellites In View (GSV)Samples: $GPGSV,2,1,07,07,79,048,42,02,51,062,43,26,36,256,42,27,27,138,42*71 $GPGSV,2,2,07,09,23,313,42,04,19,159,41,15,12,041,42*41Table 8-7 GSV Data Format8.1.5 Recommended Minimum Specific GNSS Data (RMC)Samples:$GPRMC,054301.691,A,3047.4542,N,12045.7363,E,1.39,344.66,170409,,, A*64Table 8-8 RMC Data FormatNote: SiRF Technology Inc. does not support magnetic declination. All “course over ground” data are geodetic WGS84 directions relative to true North.8.1.6 Course Over Ground and Ground Speed (VTG)Samples: $GPVTG,309.62,T, ,M,0.13,N,0.2,K,A*23Table 8-9 VTG Data FormatNote: All "course over ground" data are geodetic WGS84.8.1.7 Time & Date (ZDA)Samples: $GPZDA,181813,14,10,2003,,*4FTable 8-10 ZDA Data Format9. Coordinate System and Manufacturing Default 9.1 Coordinate SystemWorld standard coordinate system WGS84 is built in.9.2 Manufacturing Default:Parameter Com A Com BInput Protocol NMEA BinaryOutput Protocol NMEA BinaryBaud Rate 4800Parity NoneStop Bits 1Data Bits 8Datum WGS84.Protocol GGA, GSA, GSV, RMC,。