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Locosys LS2003J-G, Manual

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Locosys LS2003J-G Manual Download Page 18

LOCOSYS  Technology  Inc.

 

20F.-13, No.79, Sec. 1, Xintai 5th Rd.,   

Xizhi Dist., New Taipei City 221, Taiwan

   

℡

 886-2-8698-3698 

 886-2-8698-3699 

www.locosystech.com/

 

Page 

18/23

 

© 2018 LOCOSYS Technology Inc. 

 

 

 

Every 2000ms (0.5Hz)

(2) 

$PMTK220,2000*1C<CR><LF> 

If the command is correct and executed, GNSS module will 

output message $PMTK001,220,3*30<CR><LF> 

Note 1: The minimum interval of position fix is 100ms, i.e. the maximum update rate is 10Hz. 

Note 2: The current consumption is the same with the update rate of 1Hz. 

 

8.6

 

Configure the static navigation parameter 

The output position of GNSS module will keep the same and output speed will be zero if 

the  actual  speed  is  below  the  threshold  of  the  static  navigation  parameter.  This  is  useful  for 

different  applications.  For  example,  the  car  stopped  at  a  red  light  will  get  stationary  GNSS 

position if the threshold is 1.5m/s. It is better to disable this function by setting threshold to 0 for 

pedestrian navigation. 

The format of the software command is as below. 

$PMTK386,speed threshold*checksum<CR><LF> 

The unit of speed threshold is meter per second. The range of speed threshold is from 

0.1m/s to 2.0m/s. Value 0 is to disable the function. 

 

 

Summary of Contents for LS2003J-G

Page 1: ...ceiver circuits dedicated designed for tablet PC MID PND and smart phone that are going to integrate GNSS function 2 Features Tiny size 16 0x12 2x2 8mm MediaTek high sensitivity solution Support 99 channel GNSS Fast TTFF at low signal level Built in 12 multi tone active interference canceller Capable of SBAS WAAS EGNOS MSAS GAGAN Support GPS GLONASS GALILEO and QZSS low power consumption Fast TTFF...

Page 2: ...ec 1 Xintai 5th Rd Xizhi Dist New Taipei City 221 Taiwan 886 2 8698 3698 886 2 8698 3699 www locosystech com Page 2 23 2018 LOCOSYS Technology Inc Fig 3 1 System block diagram Fig 3 2 Typical application circuit that uses embedded antenna ...

Page 3: ... Sky 34s typical Autonomous 2 5m CEP Position Accuracy SBAS 2 5m depends on accuracy of correction data Max Altitude 50 000m Max Velocity 515 m s NMEA 0183 ver 4 0 9600 bps 8 data bits no parity 1 stop bits default 1Hz GGA GLL GSA GSV RMC VTG Protocol Support RTCM SC 104 v2 x message types 1 2 3 and 9 4 2 GNSS antenna The antenna type of LS2003J G is chip antenna Its performance is greatly affecte...

Page 4: ...ime pulse PPS default 100 ms pulse sec when 3D fix is available 4 NC No connect 5 NC No connect 6 NC No connect 7 NC No connect 8 GND P Ground 9 GND P Ground 10 TX1 O Serial output for channel 1 11 RX1 I Serial input for channel 1 12 TX0 O Serial output for channel 0 Default NMEA 13 RX0 I Serial input for channel 0 Default NMEA 14 VSTBY P Backup battery supply voltage This pin is optional 1 15 VCC...

Page 5: ... 3 3V w o active antenna Peak Acquisition Tracking Standby 36 37 2 441 148 1 mA mA mA uA Backup Battery Current IVSTBY VCC 0V 10 uA High Level Input Voltage VI H 2 0 3 6 V Low Level Input Voltage VI L 0 3 0 8 V High Level Input Current II H no pull up or down 1 1 uA Low Level Input Current II L no pull up or down 1 1 uA High Level Output Voltage VOH 2 4 3 3 V Low Level Output Voltage VOL 0 4 V Hig...

Page 6: ...pei City 221 Taiwan 886 2 8698 3698 886 2 8698 3699 www locosystech com Page 6 23 2018 LOCOSYS Technology Inc 7 Mechanical specification 7 1 Outline dimensions Symbol Min mm Typ mm Max mm W 12 1 12 2 12 3 L 15 9 16 0 16 6 H 2 7 2 8 2 9 7 2 Recommended land pattern dimensions ...

Page 7: ... PCB width Suggest the PCB width should be equal to or greater than 50mm if the PCB width is smaller than 50mm that will cause poor GPS performance For the optimum GPS performance the PCB width larger than or equal to 80mm is suggested Note All copper under the module keep out area 6 5x12 2mm should be removed Placement of other components is not allowed under the keep out area on opposite side 7 ...

Page 8: ...LOCOSYS Technology Inc 20F 13 No 79 Sec 1 Xintai 5th Rd Xizhi Dist New Taipei City 221 Taiwan 886 2 8698 3698 886 2 8698 3699 www locosystech com Page 8 23 2018 LOCOSYS Technology Inc ...

Page 9: ...2 contains the values for the following example GNGGA 053740 000 2503 6319 N 12136 0099 E 1 08 1 1 63 8 M 15 2 M 7A Table8 1 2 GGA Data Format Name Example Units Description Message ID GNGGA GGA protocol header GN for GPS GLONASS GP for GPS only GL for GLONASS only UTC Time 053740 000 hhmmss sss Latitude 2503 6319 ddmm mmmm N S indicator N N north or S south Longitude 12136 0099 dddmm mmmm E W Ind...

Page 10: ...tion Message ID GNGLL GLL protocol header GN means GPS GLONASS GP means GPS only GL means GLONASS only Latitude 2503 7150 ddmm mmmm N S indicator N N north or S south Longitude 12138 7463 dddmm mmmm E W indicator E E east or W west UTC Time 081419 000 hhmmss sss Status A A data valid or V data not valid Mode A A autonomous D DGPS E DR N Data not valid R Coarse Position S Simulator Checksum 4A CR L...

Page 11: ...ion 1 Fix not available 2 2D 3 3D GSV GNSS Satellites in View Table 8 1 8 contains the values for the following example GPGSV 3 1 10 27 85 205 49 42 54 141 41 16 51 356 47 19 49 208 47 72 GPGSV 3 2 10 23 46 281 46 31 33 111 45 09 25 308 43 21 12 059 39 75 GPGSV 3 3 10 193 40 04 33 43 GLGSV 2 1 06 85 71 078 37 75 43 003 38 86 41 186 43 74 35 076 44 6A GLGSV 2 2 06 84 26 032 30 66 07 306 35 6D Table...

Page 12: ...y be required RMC Recommended Minimum Specific GNSS Data Table 8 1 9 contains the values for the following example GNRMC 081419 000 A 2503 7150 N 12138 7463 E 0 01 0 00 160415 A 7B Table 8 1 9 RMC Data Format Name Example Units Description Message ID GNRMC RMC protocol header GN means GPS GLONASS GP means GPS only GL means GLONASS only UTC Time 081419 000 hhmmss sss Status A A data valid or V data...

Page 13: ...Reference M Magnetic Not shown Speed over ground 2 69 knots Measured speed Units N Knots Speed over ground 5 0 km hr Measured speed Units K Kilometer per hour Mode A A autonomous D DGPS E DR N Data not valid R Coarse Position S Simulator Checksum 38 CR LF End of message termination 8 2 Proprietary NMEA input output message Please refer to MTK proprietary message 8 3 Examples to configure the power...

Page 14: ...systech com Page 14 23 2018 LOCOSYS Technology Inc 8 3 2 Periodic mode When GNSS module is commanded to periodic mode it will be in operation and standby periodically Its status of power consumption is as below chart The following flow chart is an example to make GNSS module go into periodic mode and then back to normal operation mode ...

Page 15: ...riodic mode Depending on the environment and motion conditions GNSS module can adaptively adjust working standby time to achieve balance of positioning accuracy and power consumption In this mode the host CPU does not need to control GNSS module until the host CPU needs the GNSS position data The following flow chart is an example to make GNSS module go into AlwaysLocateTm mode and then back to no...

Page 16: ...tance speed logging mode and etc For more information please contact our FAE 8 5 Examples to configure the update rate of GNSS module The GNSS module supports up to 10Hz update rate that user can configure by issuing software commands Note that the configurations by software commands are stored in the battery backed SRAM that is powered through VBACKUP pin Once it drains out the default factory se...

Page 17: ...F Only GLL at 1Hz PMTK314 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 29 CR LF Only RMC at 1Hz PMTK314 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 29 CR LF Only VTG at 1Hz PMTK314 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 29 CR LF Only GGA at 1Hz PMTK314 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 29 CR LF Only GSA at 1Hz PMTK314 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 29 CR LF Only GSV at 1Hz PMTK314 0 0 0 0 0 1 0 0 0 0...

Page 18: ...e of 1Hz 8 6 Configure the static navigation parameter The output position of GNSS module will keep the same and output speed will be zero if the actual speed is below the threshold of the static navigation parameter This is useful for different applications For example the car stopped at a red light will get stationary GNSS position if the threshold is 1 5m s It is better to disable this function...

Page 19: ...Technology Inc 9 Recommended Soldering Temperature Profile The module belongs to RoHS compliant The maximum of peak temperature real on top of PCB is not over 240 Celsius Lead free Processes Lead Free Solder Paste Sn 96 5 Ag 3 0 Cu 0 5 Cycle Interval 300 sec Note The LS2003J G module should be soldered on the topside in the soldering process to prevent from falling down ...

Page 20: ...YS Technology Inc 20F 13 No 79 Sec 1 Xintai 5th Rd Xizhi Dist New Taipei City 221 Taiwan 886 2 8698 3698 886 2 8698 3699 www locosystech com Page 20 23 2018 LOCOSYS Technology Inc 10 Reel Packing information ...

Page 21: ...21 23 2018 LOCOSYS Technology Inc 11 Packing and Handling GNSS modules like any other SMD devices are sensitive to moisture electrostatic discharge and temperature By following the description sketched in the document for LOCOSYS GNSS module storage and handling it is possible to reduce the chances of them being damaged during production 11 1 Packing ...

Page 22: ...y follow the following precautions to prevent severe damage to GNSS modules LOCOSYS GNSS modules are sensitive to electrostatic discharges and thus are Electrostatic Sensitive Devices ESD Careful handling of the GNSS modules and in particular RFIN pin must follow the standard ESD safety protections Unless there is a galvanic coupling between the local GND and the PCB GND then the first point of co...

Page 23: ...F 13 No 79 Sec 1 Xintai 5th Rd Xizhi Dist New Taipei City 221 Taiwan 886 2 8698 3698 886 2 8698 3699 www locosystech com Page 23 23 2018 LOCOSYS Technology Inc Document change list Revision 1 0 First release on November 30 2018 ...

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