Globalsat ET-314 User Manual
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Globalsat ET-314 User Manual

Gps engine board
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ET-314
Version 1.2
GPS Engine Board ET-314
Version 1.2
06/22/2007
Globalsat Technology Corporation Headquarters (Far East Century Park)
16F., No. 186, Jian-Yi Road, Chung-Ho City, Taipei Hsien 235, Taiwan
Tel: 886-2-8226-3799/ Fax: 886-2-8226-3899
E-mail :
service@globalsat.com.tw
Website:
www.globalsat.com.tw
Page 1 of 19

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  • Page 1 ET-314 Version 1.2 GPS Engine Board ET-314 Version 1.2 06/22/2007 Globalsat Technology Corporation Headquarters (Far East Century Park) 16F., No. 186, Jian-Yi Road, Chung-Ho City, Taipei Hsien 235, Taiwan Tel: 886-2-8226-3799/ Fax: 886-2-8226-3899 E-mail : service@globalsat.com.tw Website: www.globalsat.com.tw Page 1 of 19...

  • Page 2: Product Information

    Product Name: ET-314 Product Description: ET-314 is a compact, high performance, and low power consumption GPS engine board. It uses SiRF Star III chipset which can track up to 20 satellites at a time and perform fast TTFF in weak signal environments.
  • Page 3 Acquisition: 42mA Tracking: 25mA Environmental Range Humidity Range 5% to 95% non-condensing -40℃ to 85℃ Operation Temperature -40℃ to 125℃ Storage Temperature The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 3 of 19...

  • Page 4: Technical Information

    ET-314 Version 1.2 2. Technical Information Block Diagram Module Pin Assignment: The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 4 of 19...

  • Page 5: Definition Of Pin Assignment

    This is the main DC supply for a 3.3V +- 5% DC input power module board. GND provides the ground for digital part. The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 5 of 19...
  • Page 6 If the bias voltage of active isn’t 3.3V,you can input bias voltage of you need to this pin. VCC_RF This pin provides DC voltage 3.3 for active antenna. Reset The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 6 of 19...
  • Page 7 –25 to +70 deg C and a typical rechargeable Lithium battery is over –20 to +70 deg C. GPIO Functions Several I/Os connected digital interface connector for custom applications. The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 7 of 19...

  • Page 8: Application Circuit

    RF_IN A_GND A_GND (1) Ground Planes: ET-314 GPS receiver needs two different ground planes. The GND_A pin(11、 12、13、14、15、16、18) shall be connect to analog ground. The GND pin(2、 10、30) connect to digital ground. (2) Serial Interface: The Serial interface pin(RXA、 TX1、 TXB、 RXB) is recommended to pull up(10KΩ).
  • Page 9 Axial Ratio: 3 dB Typical output Impedance: 50Ω Polarization: RHCP Amplifier Gain :20~26dB Typical Output VSWR: 2.0 Max. Noise Figure: 2.0 dB Max Dimensions The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 9 of 19...

  • Page 10: Recommend Layout Pad

    ET-314 Version 1.2 Recommend Layout PAD The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 10 of 19...

  • Page 11: Gll-Geographic Position-Latitude/Longitude

    Differential GPS, SPS Mode , fix valid GPS PPS Mode, fix valid 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 The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 11 of 19...
  • Page 12 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: The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 12 of 19...
  • Page 13 <CR><LF> End of message termination SiRF Technology Inc. does not support magnetic declination. All “course over ground” data are geodetic WGS48 directions. The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 13 of 19...
  • Page 14 0=SiRF Binary, 1=NMEA, 4=USER1 <baud> 1200, 2400, 4800, 9600, 19200, 38400 <DataBits> 8,7. Note that SiRF protocol is only valid f8 Data bits <StopBits> The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 14 of 19...
  • Page 15 Y coordinate position INT32 <Z> Z coordinate position INT32 <ClkOffset> Clock offset of the receiver in Hz, Use 0 for last saved The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 15 of 19...
  • Page 16 SRAM and then the receiver will restart using the saved parameters. Format: ＄PSRF102,<Baud>,<DataBits>,<StopBits>,<Parity>*CKSUM<CR><LF> <baud> 1200,2400,4800,9600,19200,38400 <DataBits> <StopBits> The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 16 of 19...
  • Page 17 When a valid LLANavigationInitialization command is received,the receiver will restart using the input parameters as a basis for satellite selection and acquisition. Format: ＄PSRF104,<Lat>,<Lon>,<Alt>,<ClkOffset>,<TimeOfWeek>,<WeekNo>, The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 17 of 19...
  • Page 18 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 The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 18 of 19...
  • Page 19 (Local map datums are a best fit to the local shape of the earth and not valid worldwide.) Examples: Datum select TOKYO_MEAN $PSRF106,178*32 The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 19 of 19...

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