Hemisphere GPS Crescent P206 Integrator manual



CrescentP206/P207OEMModules

IntegratorGuide

PartNo.875‐0344‐0Rev.A2



Thisdevicecomplieswithpart15oftheFCCRules.Operationissubjecttothefollowingtwoconditions:

(1)

Thisdevicemaynotcauseharmfulinterference,and

(2)

thisdevicemustacceptanyinterferencereceived,includinginterferencethatmaycauseundesired

operation.



ThisproductcomplieswiththeessentialrequirementsandotherrelevantprovisionsofDirective2014/53/EU.Thedeclarationof

conformitymaybeconsultedathttps://hemispheregnss.com/About‐Us/Quality‐Commitment.



CopyrightNotice

CopyrightHemisphereGNSS,Inc.(2017).Allrightsreserved.

NopartofthismanualmaybereproP206duced,transmitted,transcribed,storedinaretrievalsystemor

translatedintoanylanguageorcomputerlanguage,inanyformorbyanymeans,electronic,mechanical,

magnetic,optical,chemical,manualorotherwise,withoutthepriorwrittenpermissionofHemisphereGNSS.



Trademarks

HemisphereGNSS

®

,theHemisphereGNSSlogo,COAST

TM

,Crescent

®

,Eclipse

TM

,e‐Dif

®

,L‐Dif

TM

,miniEclipse

TM

,

PocketMAXPC

TM

,PocketMAX

TM

,PocketMax3

TM

,S320

TM

,SBX‐4

TM

,SureTrack

®

,Vector

TM

,XF1

TM

,andXF2

TM

are

proprietarytrademarksofHemisphereGNSS,Inc.Othertrademarksarethepropertiesoftheirrespective

owners.



Patents

HemisphereGNSSproductsmaybecoveredbyoneormoreofthefollowingpatents:



U.S.Patents

AustraliaPatents

6111549 6876920 7400956 8000381 8214111 2002244539

6397147 7142956 7429952 8018376 8217833 2002325645

6469663 7162348 7437230 8085196 8265826 2004320401

6501346 7277792 7460942 8102325 8271194

6539303 7292185 7689354 8138970 8307535

6549091 7292186 7808428 8140223 8311696

6711501 7373231 7835832 8174437 8334804

6744404 7388539 7885745 8184050 RE41358

6865465 7400294 7948769 8190337

OtherU.S.andforeignpatentspending.



NoticetoCustomers

Contactyourlocaldealerfortechnicalassistance.Tofindtheauthorizeddealernearyou:

HemisphereGNSS,Inc.8515E.

AndersonDriveScottsdale,AZ

85255USAPhone:(480)348‐

6380

Fax:(480)270‐5070

[email protected]

www.hemispheregnss.com



TechnicalSupport

IfyouneedtocontactHemisphereGNSSTechnicalSupport:

HemisphereGNSS,Inc.8515E.

AndersonDriveScottsdale,AZ

85255USAPhone:(480)348‐

6380

Fax:(480)270‐5070

techsupport@hemispheregnss.com



DocumentationFeedback

HemisphereGNSSiscommittedtothequalityandcontinuousimprovementofourproductsandservices.Weurge

youtoprovideHemisphereGNSSwithanyfeedbackregardingthisguidebywritingtothefollowingemailaddress:

techsupport@hemispheregnss.com.

CrescentIntegratorGuide iii PN875‐0344‐0RevA2



Contents



Contents

Chapter1 Introduction...................................................................................1

CrescentOEMBoardOptions..........................................................................2

What’sIncluded...............................................................................................3

CrescentIntegration........................................................................................3

CommonFeaturesofCrescentBoards.............................................................3

MessageInterface...........................................................................................4

UsingPocketMaxtoCommunicatewiththeCrescent.....................................4

Chapter2 BoardOverview.............................................................................5

CrescentOEMBoardKeyFeatures..................................................................6

MechanicalLayout...........................................................................................7

Connectors......................................................................................................9

MountingOptions..........................................................................................10

DirectElectricalConnectionMethod....................................................10

IndirectElectricalConnection(Cable)Method.....................................10

HeaderLayoutsandPinouts..........................................................................11

Crescent34‐PinHeaderLayout/Pinout.................................................12

Crescent20‐PinHeaderLayout/Pinout.................................................14

Signals............................................................................................................15

RFInput.................................................................................................15

SerialPorts............................................................................................15

CommunicationPortD..........................................................................15

USBPorts..............................................................................................15

LEDIndicators.......................................................................................18

1PPSTimingSignal................................................................................18

EventMarkerInput...............................................................................18

Grounds................................................................................................18

SpeedRadarOutput..............................................................................19

Shielding........................................................................................................20

ReceiverMounting........................................................................................20

ThermalConcerns..........................................................................................20

Chapter3 Operation.....................................................................................21

PoweringtheCrescent...................................................................................22

CommunicatingwiththeCrescent.................................................................22

ConfiguringtheCrescent...............................................................................22

Firmware.......................................................................................................23

ConfiguringtheDataMessageOutput..........................................................23

‘THIS’Portandthe‘OTHER’Port...........................................................23

CrescentIntegratorGuide iv PN875‐0344‐0RevA2



Contents



SavingtheCrescentConfiguration.................................................................24

UsingPortDforRTCMInput..........................................................................24

ConfigurationDefaults...................................................................................24

AppendixA FrequentlyAskedQuestions.........................................................25

Integration.....................................................................................................26

SupportandRepair........................................................................................27

Power,Communication,andConfiguration...................................................28

GNSSReceptionandPerformance.................................................................29

SBASReceptionandPerformance.................................................................30

ExternalCorrections......................................................................................31

Installation.....................................................................................................31

AppendixB Troubleshooting...........................................................................33

AppendixC TechnicalSpecifications................................................................37

P206Specifications........................................................................................38

P207Specifications........................................................................................40

Index..........................................................................................................................43

EndUserLicenseAgreement......................................................................................45

WarrantyNotice.........................................................................................................48

CrescentIntegratorGuide

1

 PN875‐0344‐0RevA2



Chapter1:Introduction



Chapter1:Introduction

CrescentOEMBoardOptions

What’sIncluded

CrescentIntegration

CommonFeaturesofCrescentBoards

MessageInterface

UsingPocketMaxtoCommunicatewiththeCrescent

CrescentIntegratorGuide

2

 PN875‐0344‐0RevA2



Chapter1:Introduction



Thismanualdoesnotcoverreceiveroperation,thePocketMax™utility,orcommandsandmessages

(NMEA0183,NMEA2000

®

orHGPSproprietary).Forinformationonthesesubjectsrefertothe

HemisphereGNSSTechnicalReference(gotowww.hemispheregnss.comandfollowthelinksto

Resources,GNSSReferenceGuide).



CrescentOEMBoardOptions

TheCrescent™OEMboardisavailableintwoformfactorsasshowninTable1‐1.



Table1‐1:Crescentboardoptions



Model GNSSSystems Compatibility L‐BandSupport

P206™

L1/L2GPS,GLONASS

andBEIDOU

HemisphereGNSS’standard

pinoutconfiguration(34‐pin)

Yes‐withoptional

HemisphereGNSSLX‐2

OEMboard

P207™

L1/L2GPS,GLONASS

andBEIDOU

Compatiblewithpopular

aftermarketproducts(20‐pin)

No



Note:ThismanualcoversCrescentP206andP207OEMboards.Whenreferringtobothboards

thismanualusesthetermCrescent.WhenreferringtoeitherCrescentmodelthismanualusesthe

modelname(P206orP207).

CrescentIntegratorGuide

3

 PN875‐0344‐0RevA2



Chapter1:Introduction



What’sIncluded

TheCrescentisavailableintwoconfigurations:

•

CrescentOEMboardonly‐designedforintegratorswhoarefamiliarwithCrescent

boardintegration

•

CrescentOEMboardandUniversalDevelopmentKit‐designedfor

integratorswhoarenewtoCrescentboardintegration

TheUniversalDevelopmentKitisdesignedtoworkwithvariousHemisphereGNSS

OEMboardsandincludesanenclosurewithcarrierboard,adapterboards,and

variouscables.

FormoreinformationontheUniversalDevelopmentKitvisitwww.hemispheregnss.com

andnavigatetotheOEMProductspageorcontactyourlocaldealer.



CrescentIntegration

SuccessfulintegrationoftheCrescentwithinasystemrequireselectronicsexpertisethatincludes:

•

Powersupplydesign

•

Serialportleveltranslation

•

Reasonableradiofrequencycompetency

•

Anunderstandingofelectromagneticcompatibility

•

Circuitdesignandlayout

TheCrescentGNSSengineisalow‐levelmoduleintendedforcustomintegrationwiththefollowing

generalintegrationrequirements:

•

Regulatedpowersupplyinput(3.3VDC±3%)and420mAcontinuous

•

Low‐levelserialport(3.3VCMOS)and/orUSBportcommunications

•

Radiofrequency(RF)inputtotheenginefromaGNSSantennaisrequiredtobeactively

amplified(10to40dBgain)

•

GPSantennaispoweredwithaseparateregulatedvoltagesourceupto15VDC

maximum

•

Antennainputimpedanceis50



CommonFeaturesofCrescentBoards

CommonfeaturesofCrescentboardsinclude:

•

372‐channelGNSSengine

•

Sub‐meterhorizontalaccuracy95%

•

Rawmeasurementoutput(viadocumentedbinarymessages)

•

Positionandheadingupdateratesof20Hzmax

•

COAST™technologythatprovidesconsistentperformancewithcorrectiondata

•

e‐Dif

®

‐ready‐abasestation‐freewayofdifferentiallypositioning

CrescentIntegratorGuide

4

 PN875‐0344‐0RevA2



Chapter1:Introduction



•

L‐Dif™‐ready–LocaldifferentialisaproprietaryHemisphereGNSSmethodwherea

specializedsetofmessagesarerelayedbetweentwoCrescentreceivers

•

Quicktimestofirstfix

•

Fourfull‐duplexserialports

•

USBports

–

USBdeviceportonly(P207)

–

USBhostandUSBdeviceports(P206)

•

1PPStimingoutput

•

Eventmarkerinput



MessageInterface

TheCrescentusesaNMEA0183interface,allowingyoutoeasilymakeconfigurationchangesby

sendingtext‐typecommandstothereceiver.

TheCrescentalsosupportsaselectionofbinarymessages.Thereisawiderarrayofinformation

availablethroughthebinarymessages,plusbinarymessagesareinherentlymoreefficientwith

data.Iftheapplicationhasarequirementforrawmeasurementdata,thisinformationisavailable

onlyinabinaryformat.

FormoreinformationonNMEA0183commandsandmessagesaswellasbinarymessagesreferto

theHemisphereGNSSTechnicalReference(gotowww.hemispheregnss.comandfollowthelinksto

Resources,GPSReferenceGuide).



UsingPocketMaxtoCommunicatewiththeCrescent

Hemisphere’sPocketMaxisafreeutilityprogramthatrunsonyourWindowsPCorWindows

mobiledevice.SimplyconnectyourWindowsdevicetotheCrescentviatheCOMportandopen

PocketMax.ThescreenswithinPocketMaxallowyoutoeasilyinterfacewiththeCrescentto:

•

SelecttheinternalSBAS,externalbeacon,orRTCMcorrectionsourceandmonitor

reception(beaconoptional)

•

ConfigureGNSSmessageoutputandportsettings

•

Recordvarioustypesofdata

•

MonitortheCrescent’sstatusandfunction

PocketMaxisavailablefordownloadfromtheHemisphereGNSSwebsite

(www.hemispheregnss.com).

Note:ForcompletespecificationsofCrescentboardsseeAppendixC,“TechnicalSpecifications.”

CrescentIntegratorGuide

5

 PN875‐0344‐0RevA2



Chapter2:BoardOverview



Chapter2:BoardOverview

CrescentOEMBoardKeyFeatures

MechanicalLayout

Connectors

MountingOptions

HeaderLayoutsandPinouts

Signals

Shielding

ReceiverMounting

ThermalConcerns

CrescentIntegratorGuide

6

 PN875‐0344‐0RevA2



Chapter2:BoardOverview



CrescentOEMBoardKeyFeatures

Withitssmallformfactor,lowpowerconsumption,andsimpleon‐boardfirmwareCrescentisan

idealsolutionforintegrators,offeringscalabilityandexpandabilityfromL1GPSwithSBAStoL1

GPS,GLONASSandBeiDou(withRTKcapability).



Crescentisofferedintwocommonindustryformfactors:

•

P206isadrop‐inreplacementsforHemisphereGNSS’Crescent

®

andminiEclipse

receivers(34‐pin)andprovideL‐bandsupportwiththeoptionalHemisphereGNSSLX‐

2™OEMboard

•

P207hasamechanicaldesigncompatiblewithpopularaftermarketproducts

(20‐pin)

ThereliablepositioningperformanceofCrescentisfurtherenhancedthroughCrescentRTKand

COASTDGPStechnology.

WithCrescent,RTKperformanceisscalable.Utilizethesamecentimeter‐levelaccuracyineitherL1

GPS‐onlymode,oremploytheperformanceofallavailableL1GPS,GLONASSandBeiDouGNSS

signals.HemisphereGNSS’SureTracktechnologyprovidespeaceofmindknowingtheRTKroveris

makinguseofeverysatelliteitistracking.BenefitfromfewerRTKdropoutsincongested

environments,fasterreacquisition,andmorerobustsolutionsduetobettercycleslipdetection.

PatentedCOASTsoftwareenablesselectHemisphereGNSSreceiverstoutilizeagingDGPScorrection

data during times of interference, signal blockage, and weak signal. Thereceiverwillcoastand

continuetomaintainsub‐meterpositioningfor40minutesormorewithoutaDGPSsignal.

CrescentIntegratorGuide

7

 PN875‐0344‐0RevA2



Chapter2:BoardOverview



MechanicalLayout

Figure2‐1showsthemechanicallayoutfortheCrescentP206OEMboard.Figure2‐2

shows the mechanical layout for the Crescent P207 OEM board. Dimensions are in

millimeters(inches)forallthreelayouts.



40.6 mm

(1.60 in)

34.3 mm

(1.35 in)

3.2 mm

(.13 in)

64.8 mm

(2.55 in)

71.1 mm

(2.80 in)

7.4 mm

(.29 in)

4.2 mm

(.17 in)

1.5 mm

(.06 in)

6.8 mm

(.27 in)

10.2 mm

(.40 in)

3.9 mm

(.15 in)

3.2 mm

x 4

(.13 in)

MCXJACK

RECEPTACLE



28.8 mm

(1.13 in)

4.3 mm

(.17 in)

Figure2‐1:CrescentP206mechanicallayout

CrescentIntegratorGuide

8

 PN875‐0344‐0RevA2



Chapter2:BoardOverview



40.6 mm

(1.60 in)

34.3 mm

(1.35 in)

3.2 mm

4.6 mm

3.2 mm

(.13 in)

(.18 in)

64.8 mm

(2.55 in)

72.6 mm

(2.85 in)

(.13 in)

7.4 mm

(.29 in)

4.2 mm

(.17 in)

1.5

mm

(.06 in)

5.9

mm

(.23 in)

11.2 mm

3.2 mm

(.13 in)

3.2 mm

x 4

(.13 in)

(.44 in)

MCX JACK

RECEPTACLE

12.6 mm

(.49 in)

4.8 mm

(.19 in)

Figure2‐2:CrescentP207mechanicallayout

CrescentIntegratorGuide

9

 PN875‐0344‐0RevA2



Chapter2:BoardOverview



Connectors

Table2‐1describesCrescentconnectorsandmatingconnectors.Youcanusedifferentcompatible

connectors;however,therequirementsmaybedifferent.Theantennainputimpedanceis50.



Table2‐1:Crescentconnectors



CrescentBoardand

ConnectorType



CrescentSMTConnector



MatingConnector

Crescent

(P206

RF MCX,femalestraightjack

Emerson(Johnson)133‐3711‐202

MCX,malestraightplug

SamtecRSP‐127824‐01

Power/ 34‐pin(17x2)maleheader, 17x2femaleSMTheader

data 0.05in(1.27mm)pitch socket,0.05in(1.27mm)pitch

SamtecFTSH‐117‐01‐L‐DV(older SamtecFLE‐117‐01‐G‐DV

P200boards)

SamtecFTSH‐117‐04‐L‐DV

Crescent

(P207)

RF MCX,femalestraightjack

Emerson(Johnson)133‐3711‐202

MCX,malestraightplug

SamtecRSP‐127824‐01

Power/

data

20‐pin(10x2)maleheader,

0.08in(2mm)pitch

SamtecTMM‐110‐01‐T‐D‐SM

10x2femaleSMTheadersocket,

0.08in(2mm)pitch

SamtecTLE‐110‐01‐G‐DV

Note:FortheSamtecFTSHheaders,‘‐04’indicates0.150”posts.

CrescentIntegratorGuide 10 PN875‐0344‐0RevA2



Chapter2:BoardOverview



MountingOptions

TherearetwooptionsformountingtheCrescent:

•

DirectElectricalConnectionmethod

•

IndirectElectricalConnection(Cable)method



DirectElectricalConnectionMethod

PlaceanRFconnector,headingconnector,andmountingholesonthecarrierboardandthen

mounttheCrescentonthestandoffsandRFandheaderconnectors.Thismethodisverycost

effectiveasitdoesnotusecableassembliestointerfacetheCrescent.



TheCrescentusesastandoffheightof7.9mm(0.3125in).Withthisheightthereshouldbeno

washersbetweeneitherthestandoffandtheCrescentorthestandoffandthecarrierboard;

otherwise,youmustmakeaccommodations.Youmayneedtochangethestandoffheightifyou

selectadifferentheaderconnector.

IfyouwanttousearightangleMCXconnector,useatallerheaderthantheSamtecpartnumber

suggestedinthisguide.Thiswillprovideclearancetohavearightanglecable‐mountconnectorand

reducethecomplexitybynothavingthecarrierboardhandletheRFsignals.SeeTable2‐1onpage

9forCrescentconnectorinformation.

ThemountingholesoftheCrescenthaveastandardinnerdiameterof3.2mm(0.125in).



IndirectElectricalConnection(Cable)Method

ThesecondmethodistomounttheCrescentmechanicallysoyoucanconnectaribbonpower/data

cabletotheCrescent.Thisrequirescableassembliesandthereisareliabilityfactorpresentwith

cableassembliesinadditiontoincreasedexpense.

Note:BeawareoftheGPSRFsignalspresentonthecarrierboardandensurethecorrectstandoff

heighttoavoidanyflexualstressesontheboardwhenyoufastenitdown.

CrescentIntegratorGuide 11 PN875‐0344‐0RevA2



Chapter2:BoardOverview



HeaderLayoutsandPinouts

TheCrescentusesadual‐rowheaderconnectortointerfacewithpower,communications,and

othersignals.

Toidentifythefirstheaderpinorienttheboardsothediamondistotheupperleftofthepins;the

firstpinisontheleftdirectlybelowthediamond(seeFigure2‐3).Thepinsarethensequentially

numberedperrowfromtoptobottom.



Figure2‐3:Identifyingthefirstpinontheheaderconnector

CrescentIntegratorGuide 12 PN875‐0344‐0RevA2



Chapter2:BoardOverview



Crescent34‐PinHeaderLayout/Pinout

TheP206boardshavea34‐pinheader.Figure2‐4showstheheaderlayoutandTable2‐2provides

theheaderpinout.



Figure2‐4:Crescent34‐pinheaderlayout



Table2‐2:Crescent34‐pinheaderpinout



Pin Name Type Description

1

 3.3V Power Receiverpowersupply,3.3V

2

 3.3V Power Receiverpowersupply,3.3V

3

 AntennaPwr Power Antennapower,DC,15Vmax

4

 BattBackup Power Power,1.5to5.5V,500nAtypical

5

 USBDEV+ I/O USBdevicedata+

6

 USBDEV– I/O USBdevicedata‐

7

 GND Power Receiverground

8

 GND Power Receiverground

9

 PATX Output PortAserialoutput,3.3VCMOS,idlehigh

10 PARX Input PortAserialinput,3.3VCMOS,idlehigh

11 PBTX Output PortBserialoutput,3.3VCMOS,idlehigh

12 PBRX Input PortBserialinput,3.3VCMOS,idlehigh

13 PDTX Output PortDserialoutput,3.3VCMOS,idlehigh

14 PDRX Input PortDserialinput,3.3VCMOS,idlehigh

15 1PPS Output Activehigh,risingedge,3.3VCMOS

16 ManualMark Input Activelow,fallingedge,3.3VCMOS

17 GPSLock Output Statusindicator,3.3VCMOS,activelow

18 DiffLock Output Statusindicator,3.3VCMOS,activelow

19 DGPSLock Output Statusindicator,3.3VCMOS,activelow

20 n/c n/c n/c

21 GPIO0 I/O Generalpurposeinput/output

22 GPIO1 I/O Generalpurposeinput/output

23 GPIO2 I/O Generalpurposeinput/output

CrescentIntegratorGuide 13 PN875‐0344‐0RevA2



Chapter2:BoardOverview



Table2‐2:Crescent34‐pinheaderpinout(continued)



Pin Name Type Description

24 GPIO3 I/O Generalpurposeinput/output

25 SpeedOutput Output 0‐3Vvariableclockoutput

26 SpeedReady Output Activelow,speedvalidindicator,3.3VCMOS

27 GND Power Receiverground

28 GND Power Receiverground

29 n/c n/c n/c

30 n/c n/c n/c

31 PCTX Output PortCserialoutput,3.3VCMOS,idlehigh

32 PCRX Input PortCserialinput,3.3VCMOS,idlehigh

33 L‐BandEnable Output Reserved

34 Reset Open

collector



Reset,opencollector,3.3Vtypical,notrequired

Note: • Pinsarenot5Vtolerant.Thepinvoltagerangeis0to3.3VDC,unless



otherwise

noted.

•

LeaveanydataorI/Opinsthatwillnotbeusedunconnected.

CrescentIntegratorGuide 14 PN875‐0344‐0RevA2



Chapter2:BoardOverview



Crescent20‐PinHeaderLayout/Pinout

TheP207boardshavea20‐pinheader.Figure2‐5showstheheaderlayoutandTable2‐3provides

theheaderpinout.



Figure2‐5:Crescent20‐pinheaderlayout



Table2‐3:Crescent20‐pinheaderpinout



Pin Name Type Description

1

 AntennaPwr Power Antennapower,DC,15Vmax

2

 3.3V Power Receiverpowersupply,3.3V

3

 USBDEV– I/O USBdevicedata‐

4

 USBDEV+ I/O USBdevicedata+

5

 Reset Open

collector

 Reset,opencollector,3.3Vtypical,notrequired

6

 PCRX Input PortCserialinput,3.3VCMOS,idlehigh

7

 PCTX Output PortCserialoutput,3.3VCMOS,idlehigh

8

 PDRX Input PortDserialinput,3.3VCMOS,idlehigh

9

 PDTX Output PortDserialoutput,3.3VCMOS,idlehigh

10 GND Power Receiverground

11 PATX Output PortAserialoutput,3.3VCMOS,idlehigh

12 PARX Input PortAserialinput,3.3VCMOS,idlehigh

13 GND Power Receiverground

14 PBTX Output PortBserialoutput,3.3VCMOS,idlehigh

15 PBRX Input PortBserialinput,3.3VCMOS,idlehigh

16 GND Power Receiverground

17 ManualMark Input Activelow,fallingedge,3.3VCMOS

18 GND Power Receiverground

19 1PPS Output Activehigh,risingedge,3.3VCMOS

20 PositionValid

Indicator

Output Statusindicator,3.3VCMOS,activelow

Note: • Pinsarenot5Vtolerant.Thepinvoltagerangeis0to3.3VDC,unless



otherwise

noted.

•

LeaveanydataorI/Opinsthatwillnotbeusedunconnected.

CrescentIntegratorGuide 15 PN875‐0344‐0RevA2



Chapter2:BoardOverview



Signals

Thissectionprovidesinformationonthesignalsavailableviaconnectors.



RFInput

TheCrescentisdesignedtoworkwithactiveGNSSantennaswithanLNAgainrangeof10to40dB.

Thepurposeoftherangeistoaccommodateforlossesinthecablesystem.Essentially,thereisa

maximumcablelossbudgetof30dBfora40dBgainantenna.Dependingonthechosenantenna,

thelossbudgetwilllikelybelower(a24dBgainantennawouldhavea14dBlossbudget).

WhendesigningtheinternalandexternalcableassembliesandchoosingtheRFconnectors,

donotexceedthelossbudget;otherwise,youwillcompromisethetrackingperformanceof

theCrescent.



SerialPorts

TheCrescentCrescenthasfourserialcommunicationports:

•

PortA,PortB,PortC‐mainports

•

PortD‐ExclusivelyusedtointerfacewiththeSBXbeaconboardoranexternal

correctionssource.ThisportwillnotoutputnormalGPS‐relatedNMEAmessages.

WhencommunicatingintoeitherPortA,B,orC,avirtualconnectionmaybe

establishedtothedeviceonPortDusingthe$JCONNcommand.See“Communication

PortD”belowformoreinformationonPortD.

TheCrescentserialports’3.3VCMOSsignallevelcanbetranslatedtointerfacetootherdevices.

Forexample,ifserialPortsA,B,and/orCareusedtocommunicatetoexternaldevices(suchasPCs)

youmusttranslatethesignallevelfrom3.3VCMOStoRS‐232.



CommunicationPortD

PortDisexclusivelyforexternalDGPScorrectioninputtotheCrescent,suchasfromHemisphere

GNSS’SBXbeaconboard.



USBPorts

TheCrescentP206hasbothaUSBhostportandaUSBdeviceportwhileP207hasonlyaUSBdevice

port,where:

•

USBdeviceport(datacommunication)showninFigure2‐6onpage16servesasa

highspeeddatacommunicationsport,suchasforaPC

•

USBhostport(datastorage)showninFigure2‐7onpage17servesasadatastorageport,

suchaswithaUSBflashdrive

TheUSBdatalinesarebidirectionalandaredifferentialpairs.TheUSBdatalinesshouldbelaidout

onprintedwireboard(PWB)with90

±15%differentialimpedance.Thetracesshouldbeovera

solidcontinuousgroundplane.Maintainparalleltracesandsymmetry.Thereshallbenotracesor

breaksinthegroundplaneunderneaththeD+andD‐traces.Itisalsorecommendedtoleavea

minimum20milspacingbetweenUSBsignalsandothersignals.TreatthedatalinesasiftheyareRF

signals.

CrescentIntegratorGuide 16 PN875‐0344‐0RevA2



Chapter2:BoardOverview



RelevantDeviceCrescentPins



USBDevice+USB

Device–

USB+Host

USB–Host



DevicecanuseUSBType‐Bor

Mini‐Bconnectors.IfMini‐B

isused,“ID”pin4isNOTCONNECTED.



Normally,adeviceuses5V;however,since

Crescentusesmorethan500mA(2.5W)it

cannotusetheBUS‐supplied5Vand

thereforeitisnotconnected

Figure2‐6:CrescentUSBdevicedesignexample

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Hemisphere GPS Crescent P206, Crescent P207 Integrator manual

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