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Globalsat Technology Corporation
16F., No. 186, Jian-Yi Road, Chung-Ho City, Taipei Hsien 235, Taiwan
Tel: 886-2-8226-3799/ Fax: 886-2-8226-3899
service@globalsat.com.tw
www.globalsat.com.tw
EM-318-02
GPS Engine Board
EM-318-02
(w/o Patch Antenna)
Page 1 of 16
USGlobalSat, Inc.
14740 Yorba Court, Chino, CA 91710
Tel: 909.597.8525 / Fax: 909.597.8532
oem@usglobalsat.com
www.usglobalsat.com
Specifications are subject to be changed without notice.
Version 1.2.1
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Summary of Contents for Globalsat EM-318-02
- Page 1 EM-318-02 Version 1.2.1 GPS Engine Board EM-318-02 (w/o Patch Antenna) Globalsat Technology Corporation USGlobalSat, Inc. 16F., No. 186, Jian-Yi Road, Chung-Ho City, Taipei Hsien 235, Taiwan 14740 Yorba Court, Chino, CA 91710 Tel: 886-2-8226-3799/ Fax: 886-2-8226-3899 Tel: 909.597.8525 / Fax: 909.597.8532 service@globalsat.com.tw...
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Page 2: Product Information
Product Part I.D. EM-318-02 Product Description: EM-318-02 is a compact, high performance, and low power consumption GPS engine board. By elimination the on-board GPS patch antenna, the EM-318-02 be engineered into tighter spaces where an external antenna would be more practical. The EM-318-02 utilizes the SiRF GSC3f/LP chipset, which can track up to 20 satellites at a time and perform fast TTFF in low signal environments. - Page 3 EM-318-02 Version 1.2.1 Sensitivity Tracking:-159dBm Cold Start 42 seconds average Warm Start 38 seconds average Hot Start 1 second average Reacquisition 0.1 second average Accuracy Position: 10 meters, 2D RMS 5 meters, 2D RMS, WAAS enabled Velocity: 0.1 m/s Time: 1us synchronized to GPS time...
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Page 4: Technical Information
EM-318-02 Version 1.2.1 2. Technical Information Block Diagram Specifications are subject to be changed without notice. Page 4 of 16... -
Page 5: Pin Assignment
EM-318-02 Version 1.2.1 Pin Assignment Pin # Name Description VCC_IN DC Supply Voltage input Analog Ground 1PPS One Pulse per second output synchronized to GPS time. Not available in trickle mode. BOOTSEL Boot mode – set high to program flash... - Page 6 EM-318-02 Version 1.2.1 Molex Micro-Miniature 1.25mm Connectors 10-Pin Connector Digi-Key Part No: WM1728-ND Molex Part No: 51021-1000 28-32 AWG Crimp Digi-Key Part No: WM1775-ND WM1775TR-ND Molex Part No: 50058-8000 Specifications are subject to be changed without notice. Page 6 of 16...
- Page 7 EM-318-02 Version 1.2.1 Dimensions Specifications are subject to be changed without notice. Page 7 of 16...
- Page 8 EM-318-02 Version 1.2.1 3. SOFTWARE COMMAND NMEA Output Command ■ GGA-Global Positioning System Fixed Data Table B-2 contains the values for the following example: $GPGGA,161229.487,3723.2475,N,12158.3416,W,1,07,1.0,9.0,M,,,,0000*18 Table B-2 GGA Data Format Name Example Units Description Message ID $GPGGA GGA protocol header UTC Time 161229.487...
- Page 9 EM-318-02 Version 1.2.1 GLL-Geographic Position-Latitude/Longitude Table B-4 contains the values for the following example: $GPGLL,3723.2475,N,12158.3416,W,161229.487,A*2C Table B-4 GLL Data Format Name Example Units Description Message ID $GPGLL GLL protocol header Latitude 3723.2475 ddmm.mmmm N/S Indicator N=north or S=south Longitude 12158.3416 dddmm.mmmm...
- Page 10 EM-318-02 Version 1.2.1 Table B-6 Mode1 Value Description Manual-forced to operate in 2D or 3D mode 2D automatic-allowed to automatically switch 2D/3D Table B-7 Mode 2 Value Description Fix Not Available GSV-GNSS Satellites in View Table B-8 contains the values for the following example:...
- Page 11 EM-318-02 Version 1.2.1 RMC-Recommended Minimum Specific GNSS Data Table B-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 B-9 RMC Data Format Name Example Units Description Message ID $GPRMC RMC protocol header UTC Time 161229.487 hhmmss.sss Status A=data valid or V=data not valid Latitude 3723.2475...
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Page 12: Units Description
EM-318-02 Version 1.2.1 ZDA—PPS timing message (synchronized to PPS) Outputs the time associated with the current 1 PPS pulse. Each message is output within a few hundred ms after the 1 PPS pulse is output and tells the time of the pulse that just... - Page 13 EM-318-02 Version 1.2.1 $PSRF100,4,38400,8,1,0*38<CR><LF> **Checksum Field: The absolute value calculated by exclusive-OR the 8 data bits of each character in the Sentence, between, but, excluding “$” and “*”. The hexadecimal value of the most significant and least significant 4 bits of the result are converted to two ASCII characters (0-9,A-F) for transmission.
- Page 14 EM-318-02 Version 1.2.1 Example: Start using known position and time. $PSRF101,-2686700,-4304200,3851624,96000,497260,921,12,3*7F C.) Set DGPS Port ID:102 Set PORT B parameters for DGPS input This command is used to control Serial Port B, an input serial only port used to receive RTCM differential corrections.
- Page 15 EM-318-02 Version 1.2.1 E.) LLA Navigation initialization ID:104 Parameters required to start using Lat/Lon/Alt This command is used to initialize the GPS module for a “Warm” start, providing real-time position (Latitude, Longitude, Altitude coordinates), clock offset, and time. This action enables the GPS receiver to search for the necessary satellite signals at the correct signal parameters.
- Page 16 EM-318-02 Version 1.2.1 module reset. Format: $PSRF105,<debug>*CKSUM<CR><LF> <debug> 0=Off,1=On Example: Debug On $PSRF105,1*3E Example: Debug Off $PSRF105,0*3F G). Select Datum ID:106 Selection of datum to be used for coordinate transformations GPS receivers perform initial position and velocity calculations using an earth-centered earth-fixed (ECEF) coordinate system.
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