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-0外文原文U-BLOX6m1Hardwaredescription1.1OverviewTheu-blox6leadlesschipcarrier(LCC)modulesarestandaloneGPSreceiversfeaturingthehighperformanceu-blox-6positioningengine.Thesecompact,easytointegratemodulescombineexceptionalGPSperformancewithhighlyflexiblepower,design,andconnectivityoptions.TheircompactformfactorsandSMTpadsallowfullyautomatedassemblywithstandardpick&placeandreflow-solderingequipmentforcost-efficient,highvolumeproductionenablingshorttime-to-market.u-bloxGPSmodulesarenotdesignedforlifesavingorsupportingdevicesorforaviationandshouldnotbeusedinproductsthatcouldinanywaynegativelyimpactthesecurityorhealthoftheuserorthirdpartiesorthatcouldcausedamagetogoods.1.2Architectureu-blox6LCCmodulesconsistoftwofunctionalparts-theRFandtheBasebandsections.SeeFigure1forblockdiagramsofthemodules.TheRFFront-Endincludestheinputmatchingelements,theSAWbandpassfilter,theu-blox6RF-IC(withintegratedLNA)andthefrequencysource.TheBasebandsectioncontainstheu-blox6Basebandprocessor,theRTCcrystalandadditionalelementssuchastheoptionalFLASHMemoryforenhancedprogrammabilityandflexibility.VCC-mainpowerThemainpowersupplyisfedthroughtheVCCpin.Duringoperation,thecurrentdrawnbytheu-blox6GPSmodulecanvarybysomeordersofmagnitude,especially,iflow-poweroperationmodesareenabled.Itisimportantthatthesystempowersupplycircuitryisabletosupportthepeakpower(seedatasheetforspecification)forashorttime.Inordertodefineabatterycapacityforspecificapplicationsthesustainedpowerfigureshallbeused.Whenswitchingfrombackupmodetonormaloperationoratstart-upu-blox6modulesmustchargetheinternalcapacitorsinthecoredomain.Incertainsituationsthiscanresultinasignificantcurrentdraw.ForlowpowerapplicationsusingPowerSaveandbackupmodesitisimportantthatthepowersupplyorlowESRcapacitorsatthemoduleinputcandeliverthiscurrent/charge.V_BCKP-backupbatteryIncaseofapowerfailureonpinVCC,thereal-timeclockandbackupRAMaresuppliedthroughpinV_BCKP.-1Thisenablestheu-blox6receivertorecoverfromapowerfailurewitheitheraHotstartoraWarmstart(dependingonthedurationofVCCoutage)andtomaintaintheconfigurationsettingssavedinthebackupRAM.Ifnobackupbatteryisconnected,thereceiverperformsaColdstartatpowerup.IfnobackupbatteryisavailableconnecttheV_BCKPpintoGND.AslongasVCCissuppliedtotheu-blox6receiver,thebackupbatteryisdisconnectedfromtheRTCandthebackupRAMinordertoavoidunnecessarybatterydrain(seeFigure2).PowertoRTCandBBRissuppliedfromVCCinthiscase.VDD_USB-USBinterfacepowersupplyOnLEA-6andNEO-6VDD_USBsuppliestheUSBinterface.IftheUSBinterfaceisnotused,theVDD_USBpinmustbeconnectedtoGND.FormoreinformationregardingthecorrecthandlingofVDD_USBseesection1.3.2Operatingmodesu-blox6moduleswithFW7.0xorROM6.02havetwocontinuousoperatingmodes(MaximumPerformanceandEco)andoneintermittentoperatingmode(PowerSavemode).MaximumPerformancemodefreelyusestheacquisitionengine,resultinginthebestpossibleTTFF,whileEcomodeoptimizestheuseoftheacquisitionenginetodeliverlowercurrentconsumption.Atmediumtostrongsignals,thereisalmostnodifferenceforacquisitionandtrackingperformanceinthesemodes.1.3Powermanagement1.3.1Connectingpoweru-blox6receivermoduleshavethreepowersupplypins:VCC,V_BCKPandVDDUSB.(NoVDDUSBforMAX-6)VCC-mainpowerThemainpowersupplyisfedthroughtheVCCpin.Duringoperation,thecurrentdrawnbytheu-blox6GPSmodulecanvarybysomeordersofmagnitude,especially,iflow-poweroperationmodesareenabled.Itisimportantthatthesystempowersupplycircuitryisabletosupportthepeakpower(seedatasheetforspecification)forashorttime.Inordertodefineabatterycapacityforspecificapplicationsthesustainedpowerfigureshallbeused.Whenswitchingfrombackupmodetonormaloperationoratstart-upu-blox6modulesmustchargetheinternalcapacitorsinthecoredomain.Incertainsituationsthiscanresultinasignificantcurrentdraw.ForlowpowerapplicationsusingPowerSaveandbackupmodesitisimportantthatthepowersupplyorlowESRcapacitorsatthemoduleinputcandeliverthiscurrent/charge.V_BCKP-backupbatteryIncaseofapowerfailureonpinVCC,thereal-timeclockandbackupRAMaresuppliedthroughpinV_BCKP.Thisenablestheu-blox6receivertorecoverfromapowerfailurewitheitheraHotstartoraWarmstart(dependingonthedurationofVCCoutage)andtomaintainthe-2configurationsettingssavedinthebackupRAM.Ifnobackupbatteryisconnected,thereceiverperformsaColdstartatpowerup.IfnobackupbatteryisavailableconnecttheV_BCKPpintoGND.AslongasVCCissuppliedtotheu-blox6receiver,thebackupbatteryisdisconnectedfromtheRTCandthebackupRAMinordertoavoidunnecessarybatterydrain(seeFigure2).PowertoRTCandBBRissuppliedfromVCCinthiscase.VDD_USB-USBinterfacepowersupplyOnLEA-6andNEO-6VDD_USBsuppliestheUSBinterface.IftheUSBinterfaceisnotused,theVDD_USBpinmustbeconnectedtoGND.FormoreinformationregardingthecorrecthandlingofVDD_USBseesection1.3.2Operatingmodesu-blox6moduleswithFW7.0xorROM6.02havetwocontinuousoperatingmodes(MaximumPerformanceandEco)andoneintermittentoperatingmode(PowerSavemode).MaximumPerformancemodefreelyusestheacquisitionengine,resultinginthebestpossibleTTFF,whileEcomodeoptimizestheuseoftheacquisitionenginetodeliverlowercurrentconsumption.Atmediumtostrongsignals,thereisalmostnodifferenceforacquisitionandtrackingperformanceinthesemodes.MaximumPerformancemodeInMaximumPerformancemode,u-blox6receiversusetheacquisitionengineatfullperformancetosearchforallpossiblesatellitesuntiltheAlmanaciscompletelydownloaded.Asaconsequence,trackingcurrentconsumptionlevelwillbeachievedwhen:AvalidGPSpositionisfixedAlmanacisentirelydownloadedEphemerisforallsatellitesinviewarevalidEcomodeInEcomode,u-blox6receiversusetheacquisitionenginetosearchfornewsatellitesonlywhenneededfornavigation:Incoldstarts,u-blox6searchesforenoughsatellitestonavigateandoptimizesuseoftheacquisitionenginetodownloadtheirephemeris.Innon-coldstarts,u-blox6focusesonsearchingforvisiblesatelliteswhoseorbitsareknownfromtheAlmanac.InEcomode,theu-blox6acquisitionenginelimitsuseofitssearchingresourcestominimizepowerconsumption.AsaconsequencethetimetofindsomesatellitesatweakestsignallevelmightbeslightlyincreasedincomparisontotheMaximumPerformancemode.-3u-blox6deactivatestheacquisitionengineassoonasapositionisfixedandasufficientnumber(atleast4)ofsatellitesarebeingtracked.Thetrackingenginecontinuestosearchandtracknewsatelliteswithoutorbitinformation.PowerSavemodeu-blox6receiversincludeaPowerSaveMode.Itsoperationiscalledcyclictrackingandallowsreducingtheaveragepowerconsumptionsignificantly.ThePowerSaveModecanbeconfiguredfordifferentupdateperiods.u-bloxrecommendsanupdateperiodof1sforbestGPSperformance.Formoreinformation,seetheu-blox6ReceiverDescriptionincludingProtocolSpecification3DeadReckoning,PPPandPrecisionTimingfeaturesshouldnotbeusedtogetherwithPowerSaveMode.1.4Antennasupply-V_ANT(LEA-6)LEA-6modulessupportactiveantennasupplyandsupervisionusethepinV_ANTtosupplytheactiveantenna.Usea10resistorinfrontofV_ANT.Formoreinformationaboutantennaandantennasupervisorseechapter2.6.Ifnotused,connecttheV_ANTpintoGND.1.5Systemfunctions1.5.1SystemmonitoringTheu-blox-6receivermodulesprovidesystemmonitoringfunctionsthatallowtheoperationoftheembeddedprocessorandassociatedperipheralstobesupervised.TheseSystemMonitoringfunctionsareoutputaspartoftheUBXprotocol,classMON.Pleaserefertotheu-blox6ReceiverDescriptionincludingProtocolSpecification3.FormoreinformationonUBXmessages,serialinterfacesfordesignanalysisandindividualsystemmonitoringfunctions.2Design-inFormigratingexistingANTARIS4productdesignstou-blox6pleaserefertoAppendixB.InordertoobtaingoodperformancewithaGPSreceivermodule,thereareanumberofpointsthatrequirecarefulattentionduringthedesign-in.Theseinclude:PowerSupply:Goodperformancerequiresacleanandstablepowersupply.Interfaces:Ensurecorrectwiring,rateandmessagesetuponthemoduleandyourhostsystem.Antennainterface:Foroptimalperformanceseekshortrouting,matchedimpedanceandnostubs.2.1ChecklistGoodperformancerequiresacleanandstablepowersupplywithminimalripple.Careneedstobeexercisedinselectingastrategytoachievethis.SeriesresistanceintheVccsupplylinecannegativelyimpactperformance.Forbetterperformance,useanLDOtoprovideacleansupplyatVccandconsiderthefollowing:Widepowerlinesorevenpowerplanesarepreferred.PlaceLDOnearthemodule.Avoidresistivecomponentsinthepowerline(e.g.narrowpowerlines,coils,resistors,etc.).-4PlacingafilterorothersourceofresistanceatVcccancreatesignificantlylongeracquisitiontimes.2.1.1Design-inchecklistDesigning-inau-blox6moduleiseasy,especiallywhenbasedonau-bloxreferencedesign.Nonetheless,itpaystodoaquicksanitycheckofthedesign.Thissectionliststhemostimportantitemsforasimpledesigncheck.TheDesign-InChecklistalsohelpstoavoidanunnecessaryrespinofthePCBandhelpstoachievethebestpossibleperformance.Followthedesign-inchecklistwhendevelopinganyu-blox6GPSapplications.Thiscansignificantlyreducedevelopmenttimeandcosts.Haveyouchosentheoptimalmodule?u-blox6moduleshavebeenintentionallydesignedtoallowGPSreceiverstobeoptimallytailoredtospecificapplications.Changingbetweenthedifferentvariantsiseasy.DoyouneedPrecisionTimingThenchooseaLEA-6TorNEO-6T.DoyouneedonboardAntennaSupervisorcircuitry-ThenchoosetheLEAformfactor.DoyouneedonboardAntennacontrol-ThenchoosetheMAXformfactor.Duyouneedsmallestsizeandforwardcompatibility-ThenchoosetheMAXformfactor.Isthepowersupplywithinthespecifiedrange(seedatasheet)?IsthevoltageVDDUSBwithinthespecifiedrange?Comparethepeakcurrentconsumptionofyouru-blox6module(70mA)withthespecificationofthepowersupply.GPSreceiversrequireastablepowersupply,avoidrippleonVCC(3mm)connectedtotheGPSreceivercaneffectivelyactasantennaandleadtoEMIdisturbancesordamage.ThefollowingelementsarecriticalregardingEMI:Unshieldedconnectors(e.g.pinrowsetc.)WeaklyshieldedlinesonPCB(e.g.ontoporbottomlayerandespeciallyattheborderofaPCB)WeakGNDconcept(e.g.smalland/orlonggroundlineconnections)EMIprotectionmeasuresarerecommendedwhenRFemittingdevicesareneartheGPSreceiver.TominimizetheeffectofEMIarobustgroundingconceptisessential.ToachieveelectromagneticrobustnessfollowthestandardEMIsuppressiontechniques.3.3.8ApplicationswithwirelessmodulesLEON/LISAGSMusespowerlevelsupto2W(+33dBm).ConsulttheDataSheetfortheabsolutemaximumpowerinputattheGPSreceiver.IsolationbetweenGPSandGSMantennaInahandheldtypedesignanisolationofapproximately20dBcanbereachedwithcarefulplacementoftheantennas.Ifsuchisolationcantbeachieved,hecaseofanintegratedGSM/GPSantenna,anadditionalinputfilterisneededontheGPSsidetoblockthehighenergyemittedbytheGSMtransmitter.ExamplesofthesekindsoffilterswouldbetheSAWFiltersfromEpcos(B9444orB7839)orMurata.IncreasingjammingimmunityJammingsignalscomefromin-bandandout-bandfrequencysources.In-bandjammingWithin-bandjammingthesignalfrequencyisveryclosetotheGPSfrequencyof1575MHz(seeFigure59).Suchjammingsignalsaretypicallycausedbyharmonicsfromdisplays,micro-controller,bussystems,etc.Measuresagainstin-bandjammingAddingaCDMA,GSM,WCDMAbandpassfilterbeforehandsetanteHardwareIntegrationManuaOut-bandjammingOut-bandjammingiscausedbysignalfrequenciesthataredifferentfromtheGPScarrier(seeFigure61).ThemainsourcesarewirelesscommunicationsystemssuchasGSM,CDMA,WCDMA,WiFi,BT,etc.Measuresagainstout-bandjammingincludemaintainingagoodgroundingconceptinthedesignandaddingaSAWorbandpassceramicfilter(asrecommendinSection3.3.6)intotheantennainputlinetotheGPSreceiver(seeFigure62).GPSandGSMsolutionwithintegratedSMTantennasandchipSIM-12AnexampleisavailableonourC16telematicsreferencedesign9,thatcombinesLEON-G200GSM/GPRSmodemmodulewithNEO-6QGPSreceivermodule.BMigrationtou-blox-6receiversMigratingANTARIS4andu-blox5designstoau-blox6receivermoduleisafairlystraightforwardprocedure.Neverthelesstherearesomepointstobeconsideredduringthemigration.B.1ChecklistformigrationHaveyouchosentheoptimalmodule?ForbestGPSperformance(i.e.bettersensitivitylevelandacquisitiontime)selectaLEA-6H,LEA-6S,NEO6QorNEO-6GfortheadvantageofTCXOperformance.IfTCXOperformanceisnotrequired,chooseaLEA-6AorNEO-6M.Foractiveantennaapplications,chooseaLEA-6H,LEA-6SorLEA-6A,sinceanantennasupplycircuitisalreadybuiltinorseechapter1.4andchapter2.6.Fortheabilitytoupgradethefirmware,chooseaLEA-6H.ForprecisiontimingchooseaLEA-6TorNEO-6TFordeadreckoningchooseaLEA-6RChecku-blox6HardwareRequirements:Checkthebatterypowertosupplythebatterybackuppin,sinceu-blox6drawshighercurrentincomparisontoANTARIS4receivers.Comparetheu-blox6modulepeakcurrentconsumption(70mA)withthespecificationofthepowersupply.u-blox6modulescanbeoperatedinthreedifferentmodes:Max.Performancemode,EcomodeorPowerSavemode.NEO-6Q,NEO-6GandNEO-6MfeatureaConfigurationPinthatallowsswitchingbetweenthepowermodes:MaxPerformancemodeandEcomode.Formoreinformationonu-blox6Powersupplyspecificationsandpowermodes,seetheLEA-6DataSheet1andNEO-6DataSheet2.Ifyouuseanactiveantennasupervisorcircuitrytodetectopenconditions,youneedtoverifyresistorreferencerecommendationsinourintegrationmanuals.Seechapter3.3EOS/ESD/EMIPrecautions.IfyouusetheUSBinterface,theexternalseriesresistorvaluesinUSB_DMandUSB_DPlineshouldbeadjusted,see1.6.2.Checku-blox6SoftwareRequirements:NotallofthefunctionalitiesavailablewithANTARIS4aresupportedbyu-blox6Firmwareversion6.02.Theseinclude:B.2SoftwaremigrationB.2.1SoftwaremigrationfromANTARIS4oru-blox5toau-blox6GPSreceiverSoftwaremigrationfromANTARIS4oru-blox5toau-blox6GPSreceiverisastraightforwardprocedure.Firmwareupdateissupportedbyalloftheseinterfaces.Thefirmwareupdatemechanismofu-blox6ismoresophisticatedthanwithANTARIS4.ItisnowbasedonUBXprotocolmessages.Customers,whoimplementedfirmwaredownloadintheirapplicationprocessor,willneedtoreplacethesoftware.Atemplateisavailablefromyouru-bloxsupportteam.-13IncasemigratingfromLEA-4TorLEA-5TtoLEA-6T-0,thecommandtosafetheconfiguration(UBX-CGF-CFG)changes.ThisisbecauseinLEA-6T-0aserialFlashattheSPIisusedinsteadoftheparallelFlash(LEA-4TandLEA5T).SofortheLEA-4T,LEA-5TandLEA-6T-1thetargettosavetheconfigurationhastobesetto“devFlash”,butfortheLEA-6T-0ithastobesetto“devSpiFlash”.Pleaserefertotheu-blox6ReceiverDescriptionincludingProtocolSpecification3formoreinformation.Thisdocumentisavailableontheu-bloxwebsite.B.2.2Softwaremigrationfrom6.02to7.03TimingSurvey-inMode:Customerscurrentlyusingsurvey-inneedtoreviewtheiraccuracylimitsettingwithCFG-TMODEorCFGTMODE2.Formigrationfrom6.02to7.03consulttheu-blox6FirmwareVersion7.0xReleaseNote5,respectivelytheublox6ReceiverDescriptionincludingProtocolSpecification3B.3HardwareMigrationB.3.1HardwareMigration:ANTARIS4u-blox6u-blox6moduleshavebeendesignedwithbackwardcompatibilityinmindbutsomeminordifferenceswereunavoidable.TheseminordifferenceswillhowevernotberelevantforthemajorityoftheANTARIS4designs.Goodperformancerequiresacleanandstablepowersupplywithminimalripple.Careneedstobeexercisedinselectingastrategytoachievethis.AvoidplacinganyresistanceontheVccline.Forbetterperformance,useanLDOtoprovideacleansupplyatVccandconsiderthefollowing:-14外文翻译1硬件描述1.1概述对了u-blox6无引线芯片载体(LCC)模块是独立的GPS接收机具有高性能了u-blox-6定位引擎。这些紧凑,易于集成模块结合卓越的GPS性能与高度灵活的功率,设计和连接选项。其紧凑的外形尺寸和SMT焊盘允许全自动装配有标准取放和回流焊接设备的成本效益,highvolume生产使短的时间将产品推向市场。u-blox的GPS模块是不适合保存或支持设备寿命或用于航空,并应在产品,可以以任何方式对用户或第三方的安全或健康造成不利影响,或可能导致货物损坏不能使用。1.2体系结构u-blox6LCC模块由两个功能部分-射频和基带部分。参见图1的模块的框图。该RF前端包括输入匹配元素中,SAW带通滤波器,该了u-blox6的RF-IC(集成LNA)和频率源。基带部分包含了u-blox6基带处理器,RTC的晶体和其他元素,如可选的闪存,用于增强的可编程性和灵活性。1.3.1连接电源u-blox6接收器模块有三个电源引脚:VCC,V_BCKP和VDDUSB。(没有VDDUSB为MAX-6)VCC-主电源主电源是通过VCC引脚送入。在操作过程中,受了u-blox6GPS模块吸收的电流可以通过规模的部分订单有所不同,特别是,如果启用了低功耗工作模式。重要的是,系统的电源电路能够支持的峰值功率(参见数据表的规格)的时间很短。为了定义一个电池容量为特定应用程序的持续功率的数字应使用。当从备份模式切换到正常操作或在启动了u-blox6的模块必须收取的核心域的内部电容。在某些情况下这可能会导致一个显著电流消耗。对于使用省电低功耗的应用和备份模式,它是在模块的输入电源或低ESR电容可以提供这种电流/充电是非常重要的。V_BCKP-备用电池如遇引脚VCC电源故障,实时时钟和备份RAM是通过针V_BCKP提供。这使得了u-blox6接收器从与任何一个热启动还是热启动(取决于VCC中断的持续时间),电源故障中恢复并保持保存在备份RAM中的配置设置。如果没有备份电池被连接时,接收器执行冷启动在上电。如果没有备份电池可用连接V_BCKP引脚GND。只要VCC被提供给了u-blox6接收器,备用电池,从RTC,为了避免不必要的电池消耗的备份RAM(见图2)断开。功率到RTC和BBR是由VCC供电在这种情况下。避免高电阻上的V_BCKP行:在从主电源切换到备用电源一个短路电流峰值的调整可能会导致引脚和可能出现的故障在高压降VDD_USB-USB接口供电-15在LEA-6和NEO-6VDD_USB提供USB接口。如果未使用的USB接口,VDD_USB引脚必须连接到GND。有关正确处理VDD_USB的更多信息,请参阅第1.3.2操作模式了u-blox6模块固件7.0倍或ROM6.02有两个连续的操作模式(最高性能和环保)和一个间歇工作模式(省电模式)。最高性能模式下自由地使用采集引擎,从而在尽可能最好的TTFF,而环保模式优化利用采集引擎,提供较低的电流消耗。在中等至强烈的信号,对于在这些模式中的捕获和跟踪性能几乎没有差别。最高性能模式在最高性能模式,了u-blox6接收器使用采集引擎的全部性能来搜索所有可能的卫星,直到年鉴完全下载。因此,跟踪电流消耗电平将被实现时:一个有效的GPS位置是固定的年鉴是完全下载鉴于星历的所有卫星均有效生态模式在ECO模式下,U-blox公司6接收机使用采集引擎需要导航时,只搜索新卫星:在冷启动时,了u-blox6搜索足够的卫星导航和优化利用采集引擎的下载他们的星历。在非冷启动,了u-blox6的重点是寻找可见的卫星,其轨道距离年鉴是已知的。在经济模式下,该了u-blox6采集引擎限制使用其搜索资源,以最大限度地降低功耗。作为结果的时间去寻找一些卫星在最弱的信号电平可能相较于最高性能模式略有增加。了u-blox6只要一个位置被固定停用采集引擎和卫星的足够数目(至少4)正在被跟踪。跟踪引擎继续搜索和跟踪新卫星无轨道信息。省电模式了u-blox6接收器包括一个省电模式。它的操作被称为环状跟踪,并允许减少平均功耗显著。省电模式可以配置为不同的更新周期。了u-blox建议为1s最好的GPS性能的更新周期。欲了解更多信息,请参阅了u-blox6接收机说明包括协议规范31.4天线供应-V_ANT(LEA-6)LEA-6模块的支持有源天线电源和监督使用针V_ANT供应有源天线。在V_ANT前面使用一个10的电阻。有关更多信息,天线和天线主管参见第2.6。如果不使用,连接V_ANT引脚GND。1.5系统功能1.5.1系统监控对了u-blox-6接收器模块提供了系统监控功能,使被监督的嵌入式处理器和相关的外围设备的操作。这些系统监控功能输出作为UBX协议,类MON的一部分。请参阅了u-blox6接收器说明包括协议规范3。有关UBX消息,设计分析和单个系统监控功能的串行接口的详细信息。2设计中的内容对于迁移现有ANTARIS4产品设计到了u-blox6请参阅附录B。-16为了获得一个GPS接收模块性能好,有很多的设计过程中需要仔细注意点。这些措施包括:电源:良好的性能,需要一个干净,稳定的电源。接口:确保正确接线,速度和模块上的消息设置和您的主机系统。天线接口:为了获得最佳性能追求短期路由,匹配阻抗,没有存根。2.1清单良好的性能,需要以最小的纹波一个干净,稳定的电源。护理需要在选择的策略来实现这一行使。在Vcc电源线串联电阻产生负面影响性能。为了获得更好的性能,使用一个LDO提供一个干净的电源在Vcc和考虑以下几点:2.1.1设计中的清单设计-在了u-blox6的模块是很容易的基础上,了u-blox的参考设计时尤其如此。尽管如此,它支付给做设计的快速完整性检查。本节列出了一个简单的设计检查最重要的项目。在应用设计检查清单也有助于避免在PCB的一个不必要的重制,并有助于实现最佳的性能。开发任意的u-blox的6GPS应用时遵循设计的清单。这可以显著减少开发时间和成本。你所选择的最优的模块?了u-blox6的模块已被故意设计成允许GPS接收器,以最佳地适合于特定应用。不同的变种之间的变化很容易。在模块的输入电容能够提供所需的电流/电荷从备份模式切换到正常操作。在某些情况下充电中的核心结构域的内部电容器可导致显著瞬时电流消耗。备用电池如果微带和相邻的GND区(在相同层上)之间的距离不超过5次微带的磁道宽度,用“共面波导”的模式在AppCad计算微带而不是“微带”的模式。2.1.2设计考虑对于具有了u-blox6GPS模块的以下功能和引脚需要考虑了简约的设计:将电源连接到VCC。VDDUSB:它送入VDDUSB和VCC之前连接USB供电的LDO。或连接到GND,如果不使用USB接口。保证一个最佳的接地连接到模块的所有接地引脚连接天线RF_IN超过50匹配微带并定义天线电源(V_ANT)的有源天线(内部或外部电源)选择所需的串行通信接口(UART,USB,SPI或DDC)和连接相应的管脚到您的应用程序如果你需要热或热启动你的应用程序,连接备用电池,以V_BCKP决定并连接你的模块上的相应引脚TIMEPULSE或RESET_N6选择是否需要在你的应用程序2.1.3汽车惯性导航(ADR)解决方案了u-bloxADR支持不同的传感器输入。经典的设定,被称为“陀螺仪加轮蜱”(GWT),由陀螺仪提供的航向信息和车轮滴答提供的速度信息。-17或者,从左右车轮(前轮或后轮)或所有车轮传感器的信息被用来差异来推断标题中,被称为“差分轮蜱”(DWT)。这导致略低性能相比GWT,但节省了陀螺仪的成本的巨
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