SDT11 GPS 模块手册.pdf

1 SDT11 ATMEL GPS Module with ultra high sensitivity (-158dBm) Features 16 channel ANTARIS4 positioning engine Ultra high sensitivity to -158 dBm Supports DGPS, WAAS, EGNOS and MSAS Supports Power saving modes 5 µA backup current Support 1 USB and 1 UART ports Cost-optimized architecture (No Flash EPROM) Ultra low power consumption 39mA Small form factor with SMT pads (micro package) RoHS compliant (lead-free) Block diagram VCC_IN RESET SDT11 GPS module External antenna bias circuit is required Active Ant bias voltage Active antenna VCC_IN RESET SDT11 GPS module External antenna bias circuit is required Active Ant bias voltage Active antenna VCC_IN RESET SDT11 GPS module External antenna bias circuit is required Active Ant bias voltage Active antenna VCC_IN RESET SDT11 GPS module External antenna bias circuit is required Active Ant bias voltage Active antenna VCC_IN RESET SDT11 GPS module External antenna bias circuit is required Active Ant bias voltage Active antenna VCC_IN RESET SDT11 GPS module External antenna bias circuit is required Active Ant bias voltage Active antenna Smart Design Technology Co., Ltd. 7F., No. 196, Sec. 2, Chongcing N. Rd., Datong District, Taipei, Taiwan (R.O.C.) 10357 Phone: +886-2-2557-1294 Fax: +886-2-2557-4794 2 Technical Specifications 1. Electrical Characteristics 1.1 Chipset ATR0601, ATR0625 ATMEL GPS chipset family (ARM7TDMI Thumb processor core embedded) with -158dBm sensitivity 1.2 General Frequency L1, 1575.42MHz Channels, C/A code 16, 1.023 MHz chip rate, 8192 time/frequency search windows 1.3 Accuracy Position 2.5 meters CEP Time 50 nanosecond rms (1 PPS) 1.4 DGPS Accuracy Position 2 meters CEP 1.5 Acquisition Rate Reacquisition End of message termination Table 3 Position Fix Indicator Value Description 0 Fix not available or invalid 1 GPS SPS Mode, fix valid 2 Differential GPS, SPS Mode, fix valid 3 GPS PPS Mode, fix valid Smart Design Technology Co., Ltd. 7F., No. 196, Sec. 2, Chongcing N. Rd., Datong District, Taipei, Taiwan (R.O.C.) 10357 Phone: +886-2-2557-1294 Fax: +886-2-2557-4794 6 GLL- Geographic Position Latitude/Longitude Table 4 contains the values for the following example: $GPGLL,3723.2475,N,12158.3416,W,161229.487,A*2C Table 4 GLL Data Format Name Example UnitsDescription Message ID $GPGLL GLL protocol header Latitude 3723.2475 ddmm.mmmm N/S Indicator N N=north or S=south Longitude 12158.3416 dddmm.mmmm E/W Indicator W E=east or W=west UTC Position 161229.487 hhmmss.sss Status A A=data valid or V=data not valid Checksum *2C End of message termination GSA-GNSS DOP and Active Satellites Table 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 5 GSA Data Format Name ExampleUnitsDescription Message ID $GPGSA GSA protocol header Mode 1 A See Table 7 Mode 2 3 See Table 6 Satellite Used in solution 07 Sv on Channel 1 Satellite Used in solution 02 Sv on Channel 2 Satellite Used Sv on Channel 12 PDOP 1.8 Position Dilution of Precision HDOP 1.0 Horizontal Dilution of Precision VDOP 1.5 Vertical Dilution of Precision Checksum *33 End of message termination Table 6 Mode 2 Value Description 1 Fix not available 2 2D 3 3D Table 7 Mode 1 Value Description M Manual- forced to operate in 2D or 3D mode A Automatic-allowed to automatically switch 2D/3D Smart Design Technology Co., Ltd. 7F., No. 196, Sec. 2, Chongcing N. Rd., Datong District, Taipei, Taiwan (R.O.C.) 10357 Phone: +886-2-2557-1294 Fax: +886-2-2557-4794 7 GSV-GNSS Satellites in View Table 8 contains the values for the following example: $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*41 Table 8 GSV Data Format Name Example Units Description Message ID $GPGSV GSV protocol header Number of Messages1 2 Range 1 to 3 Message Number11 Range 1 to 3 Satellites in View 07 Satellite ID 07 Channel 1 (Range 1 to 32) Elevation 79 Degrees Azimuth 048 Degrees Channel 1 (Maximum 90) SNR (C/No) 42 DBHz Channel 1 (True, Range 0 to 359) Satellite ID 27 Range 0 to 99, null when not tracking Elevation 27 Degrees Channel 4 (Range 1 to 32) Azimuth 138 Degrees Channel 4 (Maximum 90) SNR (C/No) 42 DBHz Channel 4 (True, Range 0 to 359) Checksum *71 Range 0 to 99, null when not tracking End of message termination 1. Depending on the number of satellites tracked multiple messages of GSV data may be required. RMC-Recommended Minimum Specific GNSS Data Table 9 contains the values for the following example: $GPRMC,161229.487,A,3723.2475,N,12158.3416,W,0.13,309.62,120598, ,*10 Table 9 RMC Data Format Name Example UnitsDescription Message ID $GPRMC RMC protocol header UTC Position 161229.487 hhmmss.sss Status A A=data valid or V=data not valid Latitude 3723.2475 ddmm.mmmm N/S Indicator N N=north or S=south Longitude 12158.3416 dddmm.mmmm E/W Indicator W E=east or W=west Speed Over Ground 0.13 knots Course Over Ground 309.62 degreesTrue Date 120598 ddmmyy Magnetic Variation degreesE=east or W=west (Not shown) Checksum *10 End of message termination Smart Design Technology Co., Ltd. 7F., No. 196, Sec. 2, Chongcing N. Rd., Datong District, Taipei, Taiwan (R.O.C.) 10357 Phone: +886-2-2557-1294 Fax: +886-2-2557-4794 8 VTG-Course Over Ground and Ground Speed Table 10 contains the values for the following example: $GPVTG,309.62,T, ,M,0.13,N,0.2,K*6E Table 10 VTG Data Format Name Example UnitsDescription Message ID $GPVTG VTG protocol header Course 309.62 degreesMeasured heading Reference T True Course degreesMeasured heading Reference M Magnetic Speed 0.13 knots Measured horizontal speed Units N Knots Speed 0.2 km/hr Measured horizontal speed Units K Kilometer per hour Checksum *6E End of message termination Smart Design Technology Co., Ltd. 7F., No. 196, Sec. 2, Chongcing N. Rd., Datong District, Taipei, Taiwan (R.O.C.) 10357 Phone: +886-2-2557-1294 Fax: +886-2-2557-4794 9 RoHS Compliant Paper 10 11 12