GeoS-3M Demo Board rev2.0
Contents
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3. 25 8 GeOSTAR www geostar navigation com WA We ST SN 3 2 External Connections The board requires following hardware connections Figure 4 e GLONASS GPS antenna e USB cable for attaching to USB port of the Host PC For proper communication via USB USB connections should be done after PC is powered up and operating system is loaded 1 r lsll l 1e Clees eV Sw Zal c Ab 8 Bom m rt E S zd gt p mS fn Bs Bs le 4 E Le Fica ECC od a c ye a Iw w LL gt GeoS 3M Demo Board Rev 2 0 Figure 4 Antenna and USB Connections The on board battery provides backup power to the module for arranging warn hot starts only 3 3 Getting Started Operation in Full power Mode After making hardware connections as described in section 3 2 the module is powered up and starts automatically in full power mode On default Port 40 works on binary protocol and Port 1 on NMEA protocol LED devices behave as follows e 3 3V constantly lighting e 7x0 Tx1 flashing once per second e HxO Hx1 flashing as soon as the Host is sending data to the module R amp D Center GeoStar navigation Ltd 2013 02 25 9 GeOSTAR www geostar navigation com WA We ST SN e STATUS flashing rate depends on current module status ACQUISITION period is 2 seconds 1 second on 1 second off indicates the module is at signal acquisition phase and no position fix yet POSITIONING period is 1 second 0 2 sec
4. ACTIVE SLEEP indicator Lighting if the module is in ACTIVE state 23 7 Signal Pads The following signals are available at on board signal pads E PPS E FRQ 1PPS The voltage levels of the signals are referred to 3 3V supply voltage 24 Assembly Drawing Battery STATUS PD ACK OFF ON 8 ya 1 S4 C9 v6 Ju A c a R4 U En c P c4 ggg D4 S32 D2 C12 1 Li E y 0 p ON OFF 8 Ic Port 0 amp Ri c R 3 R1 x1 nRESET D6 4 C7 R5 LI Bb Pa X T Rx Txt Rx1 Ev Hv us Hva Hys S4 D3 Be R7 RB R9 RI up KI d E FRQ E PPS PPS o o GeoS 3M Demo Board Rev 2 0 Figure 3 Assembly Drawing 3 How to Use the Board 3 1 USB Driver If the board is going to be used with personal computer it should have USB driver been installed The driver establishes two virtual COM ports for communicating with GeoS 3M over serial ports If demo SW GeoSDemo3Q is used for evaluating GeoS 3M module then it s not necessary to install USB driver as USB driver is already integrated into GeoSDemo3 installer If GeoSDemo3 is not used USB driver VCP Driver should be installed it is downloadable from the following URL link http www ftdichip com Drivers VCP htm R amp D Center GeoStar navigation Ltd 2013 02
5. e 6 Figure 3 Assembly Drawing eorr ae 8 Figure 4 Antenna and USB Connections cicseicccceccscccsesceccacescecccscsensccteseasccsnsenssnceseasscentensccceseissceuseissaceseasacantensscoeseiencensetsncoeseenite 9 dE MEET ORT TC 11 R amp D Center GeoStar navigation Ltd 2013 02 25 2 GeOSTAR www geostar navigation com WA Ze AX T amp ON Scope The document is the technical description of the GeoS 3M Demo Board and intended for the users of GPS GLONASS SBAS OEM module GeoS 3M The document contains three chapters and appendix as follows e Chapter 1 list of abbreviations e Chapter 2 technical description e Chapter 3 how to use the board e Appendix A schematic diagram R amp D Center GeoStar navigation Ltd 2013 02 25 3 GeOSTAR www geostar navigation com WA We ST SN 1 Abbreviations DC DC DC DC Converter lO Input Output LED Light Emission Diode LDO Low Drop Out Linear Regulator OS Operating System PC Personal Computer SW Soft Ware VCP Virtual COM Port R amp D Center GeoStar navigation Ltd 2013 02 25 GeOSTAR www geostar navigation com m X We ST SN 2 Technical Description 2 1 Introduction The Demo Board is the part of GeoS 3 Demo Kit that contains following items e GLONASS GPS Antenna e GeoSDemo3 PC based Demo SW e GeoS 3M User Manual Downloadable from www geostar navigation com 22 Overall View Backup battery Backup battery swi
6. no IS azo Ge sndov zmo n A amp enog OO7809i dW _ Z aa ev Sad csngov OSO zaar l sngov sol z9 M xar LA OH Ts E ov ad lesnaow si Deugee un BZ BIO Dey ACE ig Le sngqv i a T Snivis eu za muer 9 Ha GEET EK 3svo 4a ssngav EE IE oe 3svo rsngav LA 4 z asvo lesnaav isa anv lzsnaav s ei NY el uen YASYPLLIPOAVE ANS 0AS8891 d i OFZ zi snaav dagsnrg dass MAB GZZGONS ZX npueyuy E e a og gr jesnaov wassnE7 waasi py S OLY r ze mje 6 ES ges evz 90 GO eg ONS 8 ERC va zu L ES 6 xy P 68J suid za 9 3svo m orz aa ev S QNS ER oxy EA 83 ms 2v d E SR MOASgO9L dw OvZ Haq r z Wan z ji ft z 18 i 012 s SnB ox cA ZY YM ino aen 9q T T LN VE 9 oi Hod E P B g 1oddezzz9sdl b S 3 lai 84 angi gt 0AS8891 d i Dr S 5 L gt 420 uo 69 s id t Pt o ZSW LNONZHOT et 9 29 neg 93 AER eR ene Ni VI vd iagram ic D Schemati Figure 5 11 R amp D Center GeoStar navigation Ltd 2013 02 25
7. GATION www geostar navigation com 2 3 3 Serial Ports GeoS 3M serial ports are converted to USB in USB RS232 FT2232 chip FTDI The chip s supply voltage 3 3V comes directly from DC DC converter output so it is powered right after the board s USB port is attached to the active USB Host 2 3 4 Connectors e Antenna antenna port Type MMCX female straight e Port 0 amp 1 USB port Type mini USB 2 3 5 Switches pushbuttons Switches e Battery backup voltage control If the switch is set to ON then the battery is connected to the module when OFF the battery is disconnected Pushbuttons e ON OFF on off control Pushing the button forces the module to OFF state e nHESET manual reset control Pushing the button forces the module to RESET state e PD wake up control PD signal Pushing the button generates single PD pulse The signal wakes the module up in FIX BY REQUEST power saving mode 2 3 6 LEDs e 3 3V power indicator Continuously lighting if 3 3V is OK e 7x0 Tx1 serial ports transmit data indicators Flashing if the module sends data e Rx0 Rx1 serial ports receive data indicators Flashing if the Host sends data to the module R amp D Center GeoStar navigation Ltd 2013 02 25 7 GeOSTAR www geostar navigation com WA We ST SN e STATUS indicator of the module status Reflects following states of the module ACQUISITION POSITIONING and FALURE e PD ACK
8. onds on 0 8 seconds off indicates position fix is available FAILURE period is 0 5 seconds 0 2 seconds on 0 3 seconds off indicates the module has found hardware failure and no position fix can be calculated e PD_ACK lighting if the module is in ACTIVE state Warm hot starts can be organized in following ways e f on board backup battery is OK and Battery switch is on recycle main power by reconnecting USB port or click ON OFF or nRESET pushbutton e f Battery switch is off click ON OFF or nRESET pushbutton 3 4 Operation in Power saving Mode In this mode LED devices behave as follows e 3 3V constantly lighting e 7x0 Tx1 flashing as soon as the module is transmitting data e HxO0 Hx1 flashing as soon as the Host is sending data to the module e STATUS off in SLEEP state while in ACTIVE state behaves the same way as in full power mode e PD ACK off in SLEEP state lighting in ACTIVE state To quit power saving mode e Send dedicated message to the module e Reconnect USB port e Click ON OFF pushbutton e Click nRESET pushbutton R amp D Center GeoStar navigation Ltd 2013 02 25 10 lon com t naviga www geostar N o SAT A I se 4 Appendix A Schematic Diagram
9. tch Antenna connector GeoS 3M USB port nRESET pushbutton ON OFF pushbutton PD pushbutton Figure 1 General View 2 3 Block Diagram The board comprises following main parts e GeoS 3M module e DC DC voltage converters e USB port e Dual RS232 to USB data converter e Voltage level translators e Pushbuttons connectors switches e LED indicators R amp D Center GeoStar navigation Ltd 2013 02 25 GeOSTAR www geostar navigation com WA We ST SN 3 3V aa j KE 1PPS 50V DC DC LDo BE 3 3V 3 3V NE E a Antenna s lt m 2 a a TKO gt a gt TX1 ON OFF SE Gi ON OFF nRESET RX1 is NRESET z _PD_ACK e o PDACK l TL xa S a 71 STATUS K Z generator PD uil m STATUS li Laos Qo Port 0 amp 1 eS USB RS232 Ta a E RX1 wu hu 3 3V Figure 2 Block Diagram Refer to Appendix A for schematic diagram 2 3 1 GeoS 3M Connections The module is connected to the following supply voltages e VDD 1 8V e VDD IO 3 3V e V ANT 3 3V e VBAT on board battery 2 3 2 Power Plan The board is powered with USB bus 5 0V voltage There are two DC DC converters to generate two secondary voltages 3 3V switch regulator and 1 8V LDO Li lon battery CR1220 88mAh is the source of backup voltage R amp D Center GeoStar navigation Ltd 2013 02 25 6 GeEOSTAR NAVI
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