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Globalsat ET-333 User Manual

Gps engine board
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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
ET-333
GPS Engine Board
ET-333
Page 1 of 15
USGlobalSat, Inc.
1308 John Reed Court, City of Industry, CA 91745
Tel: 626-968-4145 / Fax: 626-968-4373
oem@usglobalsat.com
www.usglobalsat.com
Specifications are subject to be changed without notice.
Version 1.3.1

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  • Page 1 ET-333 Version 1.3.1 GPS Engine Board ET-333 Globalsat Technology Corporation USGlobalSat, Inc. 16F., No. 186, Jian-Yi Road, Chung-Ho City, Taipei Hsien 235, Taiwan 1308 John Reed Court, City of Industry, CA 91745 Tel: 886-2-8226-3799/ Fax: 886-2-8226-3899 Tel: 626-968-4145 / Fax: 626-968-4373 service@globalsat.com.tw...

  • Page 2: Product Information

    Version 1.3.1 1. Product Information Product Part I.D. ET-333 Product Description: The ET-333 GPS engine board is low cost but maintains high reliability and accuracy making it an ideal choice for integration with OEM/ODM systems Product Features: SiRF StarIII Very high sensitivity (Tracking Sensitivity: -159dBm)
  • Page 3 ET-333 Version 1.3.1 Cold Start 42 seconds average Warm Start 38 seconds average Hot Start 1 second average Reacquisition 0.1 second average Accuracy Position: 15 meters, 2D RMS 10 meters, 2D RMS, WAAS enabled Velocity: 0.1 ms (95% SA Off) Time: 1µs synchronized to GPS time...

  • Page 4: Technical Information

    ET-333 Version 1.3.1 2. Technical Information Physical Characteristics Specifications are subject to be changed without notice. Page 4 of 15...

  • Page 5: Pin Assignment

    ET-333 Version 1.3.1 Pin Assignment Ground 3.8~6.5 DC power input (Input) VBAT Backup Battery (Input) 3.3~5.5 DC power input (Input) PBRES Push Button Reset Input (Active Low) (Input) GP101 Special function Serial Data Output (GPS Data)(Output) Serial Data Input (Command)
  • Page 6 ET-333 Version 1.3.1 Pin Explanation GND: GND provides the ground for the engine boards. Be sure to connect all grounds VBAT (Backup Battery) This is the battery backup that powers the SRAM and RTC when main power is removed. Typical current draw is 10uA. Without an external backup battery or Gold-capacitor, the module/engine board will execute a cold start after every turn on.

  • Page 7: Software Commands

    ET-333 Version 1.3.1 3. Software Commands 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 8 ET-333 Version 1.3.1 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 9 ET-333 Version 1.3.1 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 10 ET-333 Version 1.3.1 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...
  • Page 11 ET-333 Version 1.3.1 ■ NMEA Input Command A.) Set Serial Port ID:100 Set PORTA parameters and protocol This command message is used to set the protocol (SiRF Binary, NMEA, or USER1) and/or the communication parameters (baud, data bits, stop bits, parity). Generally, this command is utilize to switch the GPS module back to SiRF Binary protocol mode, where an extensive message commands are readily available.
  • Page 12 ET-333 Version 1.3.1 <Y> Y coordinate position INT32 <Z> Z coordinate position INT32 <ClkOffset> Clock offset of the receiver in Hz, Use 0 for last saved value if available. If this is unavailable, a default value of 75000 for GSP1, 95000 for GSP 1/LX is used.
  • Page 13 ET-333 Version 1.3.1 This command is used to control standard NMEA data output messages: GGA, GLL, GSA, GSV, RMC, and VTG. Using this command message, standard NMEA message is polled once, or setup for periodic output. In addition, checksums may also be enable or disable contingent on receiving program requirements.
  • Page 14 ET-333 Version 1.3.1 If this is unavailable, a default value of 75000 for GSP1, 95000 for GSP1/LX is used. INT32 <TimeOfWeek> GPS Time Of Week UINT32 <WeekNo> GPS Week Number UINT16 <ChannelCount> Number of channels to use. 1-12 UBYTE <ResetCfg>...
  • Page 15 ET-333 Version 1.3.1 Name Example Units Description Message ID $PSRF106 PSRF106 protocol header Datum 21= WGS84 178= Tokyo_Mean 179= Tokyo_Japan 180= Tokyo_Korea 181= Tpkyo_Okinawa Checksum <CR><LF> End of message termination * * * Specifications are subject to be changed without notice.

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