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1 Introduction 2 Features 3 Application 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/ Product name Description Version MC-1612-G2 Standalone multiple GNSS module 1.0 1 Introduction LOCOSYS MC-1612-G2 is a complete standalone GNSS module. The module can simultaneously acquire and track multiple satellite constellations that include GPS, GLONASS, GALILEO, QZSS and SBAS. It features low power and small form factor. Besides, it can provide you with superior sensitivity and performance even in urban canyon and dense foliage environment. This module supports hybrid ephemeris prediction to achieve faster cold start. One is self-generated ephemeris prediction (called EASY) that is no need of both network assistance and host CPU’s intervention. This is valid for up to 3 days and updates automatically from time to time when GNSS module is powered on and satellites are available. The other is server-generated ephemeris prediction (called EPO) that gets from an internet server. This is valid for up to 14 days. Both ephemeris predictions are stored in the on-board flash memory and perform a cold start time less than 15 seconds. 2 Features MediaTek high sensitivity solution Support GPS, GLONASS, GALILEO and QZSS Capable of SBAS (WAAS, EGNOS, MSAS, GAGAN) Support 99-channel GNSS Low power consumption Fast TTFF at low signal level Built-in 12 multi-tone active interference canceller Free hybrid ephemeris prediction to achieve faster cold start Built-in data logger Up to 10 Hz update rate ±11ns high accuracy time pulse (1PPS) Indoor and outdoor multi-path detection and compensation Small form factor 16 x 12.2 x 2.2 mm SMD type with stamp holes; RoHS compliant ISO/TS 16949 quality control Support RTCM SC-104 Version-2.x 3 Application Personal positioning and navigation Automotive navigation Page 1/23 © 2014 LOCOSYS Technology Inc. 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/ Marine navigation Static timing application Surveying and mapping Fig 3-1 System block diagram. Fig 3-2 Typical application circuit that uses a passive antenna. Page 2/23 © 2014 LOCOSYS Technology Inc. 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/ Fig 3-3 Typical application circuit that uses an active antenna. Fig 3-4 Typical application circuit that has supervisor of the external active antenna. Page 3/23 © 2014 LOCOSYS Technology Inc. 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/ 4 GNSS receiver Chip MediaTek MT3333 GPS, GALILEO, QZSS: L1 1575.42MHz, C/A code Frequency GLONASS: L1 1598.0625MHz ~ 1605.375MHz, C/A code Channels Support 99 channels (33 Tracking, 99 Acquisition) Update rate 1Hz default, up to 10Hz Tracking -161.5dBm, up to -164dBm (with external LNA) Sensitivity Cold start -143.5dBm, up to -148dBm (with external LNA) Hot start (Open Sky) 1s (typical) Hot start (Indoor) < 30s (typical) Acquisition Time 33s (typical) without AGPS Cold Start (Open Sky) < 15s (typical) with AGPS (hybrid ephemeris prediction) Autonomous 3m (2D RMS). Position Accuracy SBAS 2.5m (depends on accuracy of correction data). Max. Altitude < 18,000 m, up to 50,000m by request Max. Velocity < 515 m/s 9600 bps (1) , 8 data bits, no parity, 1 stop bits (default) NMEA 0183 ver 4.10 Protocol Support 1Hz: GGA, GLL, GSA, GSV, RMC, VTG Real-time Differential Correction RTCM SC-104 v2.x message types 1,2,3, and 9 Note 1: Both baud rate and output message rate are configurable to be factory default. 5 Pin assignment and descriptions Page 4/23 © 2014 LOCOSYS Technology Inc. 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/ Table 5-1 Pin descriptions Pin # Name Type Description Note 1 NC Not connected 2 NC Not connected Time pulse (1PPS, default 100 ms pulse/sec when 3D fix is 3 TIMEPULSE O available) 4 NC Not connected 5 NC Not connected 6 NC Not connected 7 AADET_N I Active antenna detection. Leave open if not used. 8 V_ANT I Antenna bias voltage 9 VCC_RF O Output voltage for active antenna 1 10 GND P Ground 11 RF_IN I GNSS RF signal input 12 GND P Ground 13 GND P Ground 14 NC Not connected 15 GPIO I/O General purpose I/O (Default status indicator. When GNSS position fix is available, it outputs 50ms high per second, otherwise it outputs low.) 16 NC Not connected 17 FORCE_ON I FORCE_ON_PIN is for waking up the module when it is in BACKUP mode stage. For standard firmware, open this node. 18 TX1 O Serial output for channel 1 19 RX1 I Serial Data Input for DGPS RTCM Data Streaming 20 TX O Serial output for channel 0 (Default NMEA) 21 RX I Serial input for channel 0 (Default NMEA) Backup battery supply voltage. 22 V_BCKP P 1, 2 This pin is optional. 23 VCC P DC supply voltage 24 GND P Ground <Note> 1. In order to get the advantage of hybrid ephemeris prediction, this pin must be always powered during the period of effective ephemeris prediction. 2. The module doesn't have hot start when this pin is not applied. Page 5/23 © 2014 LOCOSYS Technology Inc. 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/ 6 DC & Temperature characteristics 6.1 Absolute maximum ratings Parameter Symbol Ratings Units Input Voltage VCC 4.3 V Input Backup Battery Voltage V_BCKP 4.3 V Operating Temperature Range Topr -40 ~ 85 ℃ Storage Temperature Range Tstg -40 ~ 85 ℃ 6.2 DC Electrical characteristics Parameter Symbol Conditions Min. Typ. Max. Units Input Voltage VCC 3.0 3.3 4.3 V Input Backup Battery Voltage V_BCKP 1.5 6.0 V VCC_RF Output Voltage VCC_RF VCC V VCC = 3.3V, w/o active antenna, Peak 130(1) mA Supply Current Iss Acquisition 31 mA Tracking 26(2) mA Standby 410 uA Backup Battery Current Ibat VCC = 0V 4 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 I I H no pull-up or down -1 1 uA Low Level Input Current I I 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 High Level Output Current IOH 2 mA Low Level Output Current IOL 2 mA Note 1. This happens when downloading AGPS data to MC-1612-G2. Note 2. Measured when position fix (1Hz) is available, input voltage is 3.3V and the function of self-generated ephemeris prediction is inactive. 6.3 Temperature characteristics Parameter Symbol Min. Typ. Max. Units Operating Temperature Topr -40 - 85 ℃ Storage Temperature Tstg -40 25 85 ℃ Page 6/23 © 2014 LOCOSYS Technology Inc. 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/ 7 Mechanical specification 7.1 Outline dimensions 7.2 Recommended land pattern dimensions Page 7/23 © 2014 LOCOSYS Technology Inc. LOCOSYS Technology Inc. 20F.-13, No.79, Sec. 1, Xintai 5th Rd., Xizhi District, New Taipei City 221, Taiwan ℡ 886-2-8698-3698 886-2-8698-3699 www.locosystech.com/ 8 Software interface 8.1 NMEA output message Table 8.1-1 NMEA output message NMEA record Description GGA Global positioning system fixed data GLL Geographic position - latitude/longitude GSA GNSS DOP and active satellites GSV GNSS satellites in view RMC Recommended minimum specific GNSS data VTG Course over ground and ground speed GGA--- Global Positioning System Fixed Data Table 8.1-2 contains the values for the following example: $GPGGA,183015.000,2503.7123,N,12138.7446,E,2,16,0.68,123.2,M,15.3,M,0000,0000*66 Table 8.1- 2 GGA Data Format Name Example Units Description Message ID $GPGGA GGA protocol header UTC Time 183015.000 hhmmss.sss Latitude 2503.7123 ddmm.mmmm N/S indicator N N=north or S=south Longitude 12138.7446 dddmm.mmmm E/W Indicator E E=east or W=west Position Fix Indicator 2 See Table 8.1-3 (2: DGPS(RTCM) or SBAS) Satellites Used 16 Range 0 to 33 HDOP 0.68 Horizontal Dilution of Precision MSL Altitude 123.2 meters Units M meters Geoid Separation 15.3 meters Units M meters Age of Diff. Corr. 0000 seconds Null fields when DGPS is not used Diff. Ref. Station ID 0000 Checksum *66 <CR> <LF> End of message termination Table 8.1-3 Position Fix Indicators Value Description 0 Fix not available or invalid 1 GPS SPS Mode, fix valid Page 8/23 © 2014 LOCOSYS Technology Inc. LOCOSYS Technology Inc. 20F.-13, No.79, Sec. 1, Xintai 5th Rd., Xizhi District, New Taipei City 221, Taiwan ℡ 886-2-8698-3698 886-2-8698-3699 www.locosystech.com/ 2 Differential GPS, SPS Mode, fix valid 3-5 Not supported 6 Dead Reckoning Mode, fix valid GLL--- Geographic Position – Latitude/Longitude Table 8.1-4 contains the values for the following example: $GPGLL,2503.7123,N,12138.7446,E,183015.000,A,D*59 Table 8.1-4 GLL Data Format Name Example Units Description Message ID $GPGLL GLL protocol header Latitude 2503.7123 ddmm.mmmm N/S indicator N N=north or S=south Longitude 12138.7446 dddmm.mmmm E/W indicator E E=east or W=west UTC Time 183015.000 hhmmss.sss Status A A=data valid or V=data not valid A=autonomous, D=DGPS, E=DR, N=Data not valid, Mode D R=Coarse Position, S=Simulator Checksum *59 <CR> <LF> End of message termination GSA---GNSS DOP and Active Satellites Table 8.1-5 contains the values for the following example: $GNGSA,A,3,18,193,21,09,12,22,27,15,25,14,,,1.44,0.68,1.27*2F $GNGSA,A,3,76,72,77,75,66,65,,,,,,,1.44,0.68,1.27*12 Table 8.1-5 GSA Data Format Name Example Units Description Message ID $GNGSA GSA protocol header Mode 1 A See Table 8.1-6 Mode 2 3 See Table 8.1-7 ID of satellite used 18 Sv on Channel 1 ID of satellite used 193 Sv on Channel 2 ….
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