PhotonWi-FiconnectedInternetofThingsdevelopmentkitwithasmallfootprint,poweredbyaSTM32

ARMCortexM3microcontrollerandCypressWi-Firadio

Modelnumber:PHOTONH,PHOTONNOHDatasheetv015

Features

MicrocontrollerspecsSTM32F205120MhzARMCortexM31MBFlash128KBRAM18mixed-signalGPIO(digital,ADC,PWM)Advancedperipherals:DAC,I2S,I2C,CAN

Wi-FispecsCypressBCM43362single-chipWi-FiradioSingleband2.4GHzIEEE802.11b/g/nSupportswirelessdataratesofupto65Mbit/sUltralowpowersleep,stand-byandstopmodesSupportsOpen,WEP,WAPI,WPAandWPA2-PSKWiFisecuritymodesSoftAPsetup

OtherspecsOn-boardRGBstatusLEDBreadboardfriendly24-pinpackageSingle-sidedPCBwithcastallatededgesforsurfacemountReal-timeoperatingsystem(FreeRTOS)FCC/CE/IC/TeleccertifiedOpensourcehardware

SimpletosetupanduseSetupwithmobileappwithinminutesConnectstotheParticlecloudoutoftheboxProgramovertheairthroughtheParticleWebIDEWorkonprojectslocallywiththeParticleDesktopIDEScriptcommontaskswiththeParticleCommandLineInterfaceSenddatato3rdpartyservicesthroughwebhooksandintegrationsMonitorstateofdevicethroughtheParticleConsole

CommunityresourcesExplorefullydevelopedprojectstogetthroughIoTlearningcurveUsecommunity-providedcodelibrariesforcommonperipheralsJointheParticlecommunityforinspirationandhelpbyexperts

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55667789

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202020202121

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FunctionaldescriptionOVERVIEWFEATURES

InterfacesBLOCKDIAGRAMPOWERRFFCCAPPROVEDANTENNASPERIPHERALSANDGPIOJTAGANDSWDEXTERNALCOEXISTENCEINTERFACE

MemoryMapSTM32F205RGY6FLASHLAYOUTOVERVIEWDCTLAYOUTMEMORYMAP(COMMON)MEMORYMAP(MODULARFIRMWARE-DEFAULT)MEMORYMAP(MONOLITHICFIRMWARE-OPTIONAL)

PinandbuttondefinitionPINMARKINGSPINDESCRIPTIONPINOUTDIAGRAMS

TechnicalspecificationABSOLUTEMAXIMUMRATINGSRECOMMENDEDOPERATINGCONDITIONSWI-FISPECIFICATIONSI/OCHARACTERISTICS

MechanicalspecificationsDIMENSIONSANDWEIGHTMATINGCONNECTORSRECOMMENDEDPCBLANDPATTERN(PHOTONWITHHEADERS)RECOMMENDEDPCBLANDPATTERN(PHOTONWITHOUTHEADERS)

SchematicSCHEMATIC-USBSCHEMATIC-POWERSCHEMATIC-USERI/OSCHEMATIC-RFSCHEMATIC-PØWI-FIMODULE

LayoutPHOTONV1.0.0TOPLAYER(GTL)PHOTONV1.0.0GNDLAYER(G2L)PHOTONV1.0.03V3LAYER(G15L)PHOTONV1.0.0BOTTOMLAYER(GBL)

242525

262728282828

293031333435

RecommendedsolderreflowprofileBillofMaterials

BUILDYOUROWNDESIGNBASEDONTHEPHOTON!

OrderinginformationQualificationandapprovalsProducthandling

PACKAGINGMOISTURESENSITIVITYLEVELSESDPRECAUTIONS

DefaultsettingsGlossaryFCCICCEWarningsandEndProductLabelingRequirementsRevisionhistoryKnownErrataContact

Functionaldescription

Particle'sInternetofThingshardwaredevelopmentkit,thePhoton,provideseverythingyouneedtobuildaconnectedproduct.ParticlecombinesapowerfulARMCortexM3micro-controllerwithaBroadcomWi-Fichipinatinythumbnail-sizedmodulecalledthePØ(P-zero).

Togetyoustartedquickly,Particleaddsarocksolid3.3VDCSMPSpowersupply,RFanduserinterfacecomponentstothePØonasmallsingle-sidedPCBcalledthePhoton.Thedesignisopensource,sowhenyou'rereadytointegratethePhotonintoyourproduct,youcan.

ThePhotoncomesintwophysicalforms:withheadersandwithout.PrototypingiseasywithheadersasthePhotonplugsdirectlyintostandardbreadboardsandperfboards,andmayalsobemountedwith0.1"pitchfemaleheadersonaPCB.Tominimizespacerequired,thePhotonformfactorwithoutheadershascastellatededges.ThesemakeitpossibletosurfacemountthePhotondirectlyontoyourPCB.

ParticlePØWi-Fimodule

BroadcomBCM43362Wi-Fichip802.11b/g/nWi-FiSTM32F205RGY6120MhzARMCortexM31MBflash,128KBRAM

On-boardRGBstatusLED(ext.driveprovided)18Mixed-signalGPIOandadvancedperipheralsOpensourcedesignReal-timeoperatingsystem(FreeRTOS)SoftAPsetupFCC,CEandICcertified

OVERVIEW

FEATURES

Interfaces

BLOCKDIAGRAM

PowertothePhotonissuppliedviatheon-boardUSBMicroBconnectorordirectlyviatheVINpin.IfpowerissupplieddirectlytotheVINpin,thevoltageshouldberegulatedbetween3.6VDCand5.5VDC.WhenthePhotonispoweredviatheUSBport,VINwilloutputavoltageofapproximately4.8VDCduetoareversepolarityprotectionseriesschottkydiodebetweenV+ofUSBandVIN.Whenusedasanoutput,themaxloadonVINis1A.3V3canalsobeusedasanoutput,buthasalimitedoverheadofonly100mAavailable.(PleaserefertoAbsoluteMaximumRatingsformoreinfo).

Typicalaveragecurrentconsumptionis80mAwith5V@VINwithWi-Fion.Deepsleepquiescentcurrentistypically80uA(PleaserefertoRecommendedOperatingConditionsformoreinfo).WhenpoweringthePhotonfromtheUSBconnector,makesuretouseaqualitycabletominimizeIRdrops(currentxresistance=voltage)inthewiring.Ifahighresistancecable(i.e.,lowcurrent)isused,peakcurrentsdrawnfromthePhotonwhentransmittingandreceivingwillresultinvoltagesagattheinputwhichmaycauseasystembrownoutorintermittentoperation.Likewise,thepowersourceshouldbesufficientenoughtosource1Aofcurrenttoprovideanadequateamountofcurrentoverhead(especiallyifpoweringadditionalcircuitryoffofVIN).

Warning:WhenpoweringthePhotonfromlongwiresonUSBandVIN,careshouldbetakentoprotectagainstdamagingvoltagetransients.FromtheRichtekdatasheet:

Whenaceramiccapacitorisusedattheinputandthepowerissuppliedbyawalladapterthroughlong

wires,aloadstepattheoutputcaninduceringingattheinput,VIN.Atbest,thisringingcancoupletothe

outputandbemistakenasloopinstability.Atworst,asuddeninrushofcurrentthroughthelongwirescan

potentiallycauseavoltagespikeatVINlargeenoughtodamagethepart.

Toavoidthesevoltagespikes,keepinputwiringasshortaspossible.Iflongwiresareunavoidable,itisadvisabletoadda5.1VzenerdiodeorsimilartransientsuppressiondevicefromVINtoGND.Anothertechniqueisaddingmorecapacitancetotheinputusinganelectrolyticcapacitor.PleaserefertoAN-88byLinearforagooddiscussiononthistopic.

TheRFsectionofthePhotonisafinelytunedimpedancecontrollednetworkofcomponentsthatoptimizetheefficiencyandsensitivityoftheWi-Ficommunications.

AnRFfeedlinerunsfromthePØmoduleintoaSPDTRF-switch.LogiclevelcontrollinesonthePØmoduleselectwhichofthetwoportsoftheRF-switchisconnectedtotheRFfeedline.A100pFdecouplingcapacitorislocatedoneachcontrolline.OneportisconnectedtoaPCBceramicchipantenna,andtheotherisconnectedtoau.FLconnectorforexternalantennaadaptation.Thedefaultportwillbesettothechipantenna.

Additionally,auserAPIisavailabletoswitchbetweeninternal,externalandevenanautomaticmodewhichcontinuouslyswitchesbetweeneachantennaandselectsthebestsignal.AllthreeRFportsontheRF-switchhavea10pFRFqualityDC-blockingcapacitorinserieswiththem.Theseeffectivelypass2.4GHzfrequenciesfreelywhileblockingunwantedDCvoltagesfromdamagingtheRF-switch.AllRFtracesareconsideredastinytransmissionlinesthathaveacontrolled50ohmimpedance.

Thechipantennaisimpedancematchedtothe50ohmRFfeedlineviaaPinetworkcomprisedofthreeRFinductors(1series,2shunt).ThesevaluesarequitespecifictothePhotonduetothePCBconstructionandlayoutoftheRFsection.EvenifthePhoton'slayoutdesigniscopiedexactly,toachievethebestperformanceitwouldbeworthre-examiningthePinetworkvaluesonactualsamplesofthePCBinquestion.

POWER

RF

AntennaType Manufacturer MFG.Part# Gain

Dipoleantenna LumenRadio 104-1001 2.15dBi

Chipantenna AdvancedCeramicX AT7020-E3R0HBA 1.3dBi

ThePhotonhastonofcapabilityinasmallfootprint,withanalog,digitalandcommunicationinterfaces.

PeripheralType Qty

Input(I)/Output(O)

FT[1]/3V3[2]

Digital 18 I/O FT/3V3

Analog(ADC) 8 I 3V3

Analog(DAC) 2 O 3V3

SPI 2 I/O 3V3

I2S 1 I/O 3V3

I2C 1 I/O FT

CAN 1 I/O 3V3[4]

USB 1 I/O 3V3

PWM 9[3] O 3V3

Notes:

[1]FT=5.0Vtolerantpins.AllpinsexceptA3andDACare5Vtolerant(whennotinanalogmode).Ifusedasa5Vinputthepull-up/pull-downresistormustbedisabled.

[2]3V3=3.3Vmaxpins.

[3]PWMisavailableonD0,D1,D2,D3,A4,A5,WKP,RX,TXwithacaveat:PWMtimerperipheralisduplicatedontwopins(A5/D2)and(A4/D3)for7totalindependentPWMoutputs.Forexample:PWMmaybeusedonA5whileD2isusedasaGPIO,orD2asaPWMwhileA5isusedasananaloginput.HoweverA5andD2cannotbeusedasindependentlycontrolledPWMoutputsatthesametime.

[4]Technicallythesepinsare5.0Vtolerant,butsinceyouwouldn'toperatethemwitha5.0Vtransceiverit'spropertoclassifythemas3.3V.

FCCAPPROVEDANTENNAS

PERIPHERALSANDGPIO

PinD3throughD7areJTAGinterfacepins.ThesecanbeusedtoreprogramyourPhotonbootloaderoruserfirmwareimagewithstandardJTAGtoolssuchastheST-Linkv2,J-Link,R-Link,OLIMEXARM-USB-TINI-H,andalsotheFTDI-basedParticleJTAGProgrammer.Ifyouareshortonavailablepins,youmayalsouseSWDmodewhichrequireslessconnections.

PhotonPin JTAG SWD

STM32F205RGY6Pin

PØPin# PØPinName

DefaultInternal[1]

D7 JTAG_TMS SWD/SWDIO PA13 44 MICRO_JTAG_TMS ~40kpull-up

D6 JTAG_TCK CLK/SWCLK PA14 40 MICRO_JTAG_TCK ~40kpull-down

D5 JTAG_TDI PA15 43 MICRO_JTAG_TDI ~40kpull-up

D4 JTAG_TDO PB3 41 MICRO_JTAG_TDO Floating

D3 JTAG_TRST PB4 42 MICRO_JTAG_TRSTN ~40kpull-up

3V3 Power Power

GND Ground Ground

RST Reset Reset

Notes:[1]DefaultstateafterresetforashortperiodoftimebeforethesepinsarerestoredtoGPIO(ifJTAGdebuggingisnotrequired,i.e. USE_SWD_JTAG=y isnotspecifiedonthecommandline.)

Astandard20-pin0.1"shroudedmaleJTAGinterfaceconnectorshouldbewiredasfollows:

JTAGANDSWD

ThePhotonsupportscoexistencewithBluetoothandotherexternalradiosviathethreegoldpadsonthetopsideofthePCBnearpinA3.Thesepadsare0.035"square,spaced0.049"apart.Thisspacingsupportsthepossibilityoftackingonasmall1.25mm-1.27mmpitch3-pinmaleheadertomakeitsomewhateasiertointerfacewith.

Whentworadiosoccupyingthesamefrequencybandareusedinthesamesystem,suchasWi-FiandBluetooth,acoexistenceinterfacecanbeusedtocoordinatetransmitactivity,toensureoptimalperformancebyarbitratingconflictsbetweenthetworadios.

Pad# PØPinNamePØPin

# I/O Description

1 BTCX_RF_ACTIVE 9 I SignalsBluetoothisactive

2 BTCX_STATUS 10 I SignalsBluetoothprioritystatusandTX/RXdirection

3 BTCX_TXCONF 11 O OutputgivingBluetoothpermissiontoTX

WhenthesepadsareprogrammedtobeusedasaBluetoothcoexistenceinterface,they'resetashighimpedanceonpowerupandreset.

EXTERNALCOEXISTENCEINTERFACE

MemoryMap

Bootloader(16KB)DCT1(16KB),storesWi-Ficredentials,keys,mfginfo,systemflags,etc..DCT2(16KB),swapareaforDCT1EEPROMemulationbank1(16KB)EEPROMemulationbank2(64KB)Systemfirmware(512KB)[256KBWi-Fi/comms+256KBhal/platform/services]Factorybackup,OTAbackupanduserapplication(384KB)[3x128KB]

TheDCTareaofflashmemoryhasbeenmappedtoaseparateDFUmediadevicesothatwecanincrementallyupdatetheapplicationdata.Thisallowsoneitem(say,serverpublickey)tobeupdatedwithouterasingtheotheritems.

DCTlayoutin release/stable foundhereinfirmware.

Region Offset Size

systemflags 0 32

version 32 2

deviceprivatekey 34 1216

devicepublickey 1250 384

ipconfig 1634 120

featureflags 1754 4

countrycode 1758 4

claimcode 1762 63

claimed 1825 1

ssidprefix 1826 26

devicecode 1852 6

versionstring 1858 32

dnsresolve 1890 128

reserved1 2018 64

serverpublickey 2082 768

padding 2850 2

flashmodules 2852 100

productstore 2952 24

antennaselection 2976 1

cloudtransport 2977 1

altdevicepublickey 2978 128

altdeviceprivatekey 3106 192

altserverpublickey 3298 192

altserveraddress 3490 128

deviceid 3618 12

radioflags 3630 1

modebuttonmirror 3631 32

STM32F205RGY6FLASHLAYOUTOVERVIEW

DCTLAYOUT

ledmirror 3663 96

ledtheme 3759 64

reserved2 3823 435

Note:Writing0xFFtooffset34(DEFAULT)or3106(ALTERNATE)willcausethedevicetore-generateanewprivatekeyonthenextboot.AlternatekeysarecurrentlyunsupportedonthePhotonbutareusedontheElectronasUDP/ECCkeys.Youshouldnotneedtousethisfeatureunlessyourkeysarecorrupted.

//RegenerateDefaultKeysecho-e"\xFF">fillbyte&&dfu-util-d2b04:d006-a1-s34-Dfillbyte//RegenerateAlternateKeysecho-e"\xFF">fillbyte&&dfu-util-d2b04:d006-a1-s3106-Dfillbyte

Region StartAddress EndAddress Size

Bootloader 0x8000000 0x8004000 16KB

DCT1 0x8004000 0x8008000 16KB

DCT2 0x8008000 0x800C000 16KB

EEPROM1 0x800C000 0x8010000 16KB

EEPROM2 0x8010000 0x8020000 64KB

Region StartAddress EndAddress Size

SystemPart1 0x8020000 0x8060000 256KB

SystemPart2 0x8060000 0x80A0000 256KB

UserPart 0x80A0000 0x80C0000 128KB

OTABackup 0x80C0000 0x80E0000 128KB

FactoryBackup 0x80E0000 0x8100000 128KB

Region StartAddress EndAddress Size

Firmware 0x8020000 0x8080000 384KB

FactoryReset 0x8080000 0x80E0000 384KB

Unused(factoryresetmodular) 0x80E0000 0x8100000 128KB

MEMORYMAP(COMMON)

MEMORYMAP(MODULARFIRMWARE-DEFAULT)

MEMORYMAP(MONOLITHICFIRMWARE-OPTIONAL)

Pinandbuttondefinition

PINMARKINGS

Pin Description

VIN

Thispincanbeusedasaninputoroutput.Asaninput,supply3.6to5.5VDCtopowerthePhoton.WhenthePhotonispoweredviatheUSBport,thispinwilloutputavoltageofapproximately4.8VDCduetoareversepolarityprotectionseriesSchottkydiodebetweenVUSBandVIN.Whenusedasanoutput,themaxloadonVINis1A.

RSTActive-lowresetinput.On-boardcircuitrycontainsa1kohmpull-upresistorbetweenRSTand3V3,and0.1uFcapacitorbetweenRSTandGND.

VBAT SupplytotheinternalRTC,backupregistersandSRAMwhen3V3isnotpresent(1.65to3.6VDC).

3V3

Thispinistheoutputoftheon-boardregulatorandisinternallyconnectedtotheVDDoftheWi-Fimodule.WhenpoweringthePhotonviaVINortheUSBport,thispinwilloutputavoltageof3.3VDC.ThispincanalsobeusedtopowerthePhotondirectly(maxinput3.3VDC).Whenusedasanoutput,themaxloadon3V3is100mA.NOTE:WhenpoweringthePhotonviathispin,ensurepowerisdisconnectedfromVINandUSB.

RX PrimarilyusedasUARTRX,butcanalsobeusedasadigitalGPIOorPWM[2].

TX PrimarilyusedasUARTTX,butcanalsobeusedasadigitalGPIOorPWM[2].

WKPActive-highwakeuppin,wakesthemodulefromsleep/standbymodes.WhennotusedasaWAKEUP,thispincanalsobeusedasadigitalGPIO,ADCinputorPWM[2].Canbereferredtoas A7 whenusedasanADC.

DAC12-bitDigital-to-Analog(D/A)output(0-4095),referredtoas DAC or DAC1 insoftware.CanalsobeusedasadigitalGPIOorADC.Canbereferredtoas A6 whenusedasanADC.A3isasecondDACoutputusedasDAC2 insoftware.

A0~A7

12-bitAnalog-to-Digital(A/D)inputs(0-4095),andalsodigitalGPIOs. A6 and A7 arecodeconveniencemappings,whichmeanspinsarenotactuallylabeledassuchbutyoumayusecodelikeanalogRead(A7) . A6 mapstotheDACpinand A7 mapstotheWKPpin.A4,A5,A7mayalsobeusedasaPWM[2]output.

D0~D7 DigitalonlyGPIOpins.D0~D3mayalsobeusedasaPWM[2]output.

Notes:[1]Inadditiontothe24pinsaroundtheoutsideofthePhoton,thereare7padsonthebottomthePhotonPCBthatcanbeusedtoconnecttoextrasignals:RGBLEDoutputs,SETUPbutton,SMPSenablelineandUSBD+/D-.PhotonPins#25-31aredescribedinthePinoutdiagrams.AlsorefertotheRecommendedPCBlandpatternphotonwithoutheaderssectionfortheirlocationonthebottomofthePhoton.

[2]PWMisavailableonD0,D1,D2,D3,A4,A5,WKP,RX,TXwithacaveat:PWMtimerperipheralisduplicatedontwopins(A5/D2)and(A4/D3)for7totalindependentPWMoutputs.Forexample:PWMmaybeusedonA5whileD2isusedasaGPIO,orD2asaPWMwhileA5isusedasananaloginput.HoweverA5andD2cannotbeusedasindependentlycontrolledPWMoutputsatthesametime.

PINDESCRIPTION

Notes:

[1]MICRO_SPI_SSNisonlyforreferenceasaPØmodulepinname.ItistechnicallyspeakingtheSTM32pinPA4whichistheSSpininanhardwareSPIdrivensense,howeverintheParticleAPISPISSisonlyusercontrolledasaGPIO.ThehardwareSSpinisnotimplemented.ThedefaultSSpinfortheParticleSPIAPIisA2(STM32pinPC2),butanyGPIOcanbeusedforthisfunctionwithSPI.begin(pin).

PINOUTDIAGRAMS

Technicalspecification

Parameter Symbol Min Typ Max Unit

SupplyInputVoltage VVIN-MAX +6.5 V

SupplyOutputCurrent IVIN-MAX-L 1 A

SupplyOutputCurrent I3V3-MAX-L 100 mA

StorageTemperature Tstg -40 +85 °C

EnableVoltage VEN VVIN+0.6 V

ESDSusceptibilityHBM(HumanBodyMode) VESD 2 kV

Parameter Symbol Min Typ Max Unit

SupplyInputVoltage VVIN +3.6 +5.5 V

SupplyInputVoltage V3V3 +3.0 +3.3 +3.6 V

SupplyOutputVoltage VVIN +4.8 V

SupplyOutputVoltage V3V3 +3.3 V

SupplyInputVoltage VVBAT +1.65 +3.6 V

SupplyInputCurrent(VBAT) IVBAT 19 uA

OperatingCurrent(Wi-Fion) IVINavg 80 100 mA

OperatingCurrent(Wi-Fion) IVINpk 235[1] 430[1] mA

OperatingCurrent(Wi-Fion,w/powersave) IVINavg 18 100[2] mA

OperatingCurrent(Wi-Fioff) IVINavg 30 40 mA

SleepCurrent(5V@VIN) IQs 1 2 mA

DeepSleepCurrent(5V@VIN) IQds 80 100 uA

OperatingTemperature Top -20 +60 °C

HumidityRangeNoncondensing,relativehumidity 95 %

Notes:

[1]Thesenumbersrepresenttheextremerangeofshortpeakcurrentburstswhentransmittingandreceivingin802.11b/g/nmodesatdifferentpowerlevels.AverageTXcurrentconsumptioninwillbe80-100mA.

[2]Theseareveryshortaveragecurrentburstswhentransmittingandreceiving.OnaverageifminimizingfrequencyofTX/RXevents,currentconsumptioninpowersavemodewillbe18mA

Feature Description

WLANStandards IEEE80211b/g/n

AntennaPort SingleAntenna

FrequencyBand 2.412GHz--2.462GHz(UnitedStatesofAmericaandCanada)

2.412GHz--2.472GHz(EU/Japan)

SubChannels 1--11(UnitedStatesofAmericaandCanada)

1--13(EU/Japan)

ABSOLUTEMAXIMUMRATINGS

RECOMMENDEDOPERATINGCONDITIONS

WI-FISPECIFICATIONS

Modulation DSSS,CCK,OFDM,BPSK,QPSK,16QAM,64QAM

PØmoduleWi-Fioutputpower Typ. Tol. Unit

RFAverageOutputPower,802.11bCCKMode 1M Avail.uponrequest +/-1.5 dBm

11M - +/-1.5 dBm

RFAverageOutputPower,802.11gOFDMMode 6M - +/-1.5 dBm

54M - +/-1.5 dBm

RFAverageOutputPower,802.11nOFDMMode MCS0 - +/-1.5 dBm

MCS7 - +/-1.5 dBm

ThesespecificationsarebasedontheSTM32F205RGY6datasheet,withreferencetoPhotonpinnomenclature.

Parameter Symbol Conditions Min Typ Max Unit

StandardI/Oinputlowlevelvoltage VIL -0.30.28*(V3V3-

2)+0.8V

I/OFT[1]inputlowlevelvoltage VIL -0.30.32*(V3V3-2)+0.75

V

StandardI/Oinputhighlevelvoltage VIH0.41*(V3V3-

2)+1.3V3V3+0.3 V

I/OFT[1]inputhighlevelvoltage VIH V3V3>2V0.42*(V3V3-

2)+15.5 V

VIH V3V3≤2V0.42*(V3V3-

2)+15.2 V

StandardI/OSchmitttriggervoltagehysteresis[2]

Vhys 200 mV

I/OFTSchmitttriggervoltagehysteresis[2] Vhys 5%V3V3[3] mV

Input/Outputcurrentmax Iio ±25 mA

Input/Outputcurrenttotal Iiototal ±120 mA

Inputleakagecurrent[4] IlkgGND≤Vio≤V3V3

GPIOs±1 µA

Inputleakagecurrent[4] Ilkg RPUVio=5V,I/O

FT3 µA

Weakpull-upequivalentresistor[5] RPU Vio=GND 30 40 50 kΩ

Weakpull-downequivalentresistor[5] RPD Vio=V3V3 30 40 50 kΩ

I/Opincapacitance CIO 5 pF

DACoutputvoltage(buffersenabledbydefault)

VDAC 0.2 V3V3-0.2 V

DACoutputresistiveload(buffersenabledbydefault)

RDAC 5 kΩ

DACoutputcapacitiveload(buffersenabledbydefault)

CDAC 50 pF

Notes:

[1]FT=Five-volttolerant.InordertosustainavoltagehigherthanV 3V3+0.3theinternalpull-up/pull-

downresistorsmustbedisabled.

[2]HysteresisvoltagebetweenSchmitttriggerswitchinglevels.Basedoncharacterization,nottested

inproduction.

I/OCHARACTERISTICS

[3]Withaminimumof100mV.

[4]Leakagecouldbehigherthanmax.ifnegativecurrentisinjectedonadjacentpins.

[5]Pull-upandpull-downresistorsaredesignedwithatrueresistanceinserieswithswitchable

PMOS/NMOS.ThisPMOS/NMOScontributiontotheseriesresistanceisminimum(~10%order).

Mechanicalspecifications

Headers Dimensionsininches(mm) Weight

With 1.44x0.8x0.27(36.58x20.32x6.86) 5grams

Without 1.44x0.8x0.17(36.58x20.32x4.32) 3.7grams

ThePhoton(withheaders)canbemountedwith(qty2)12-pinsinglerow0.1"femaleheaders.Typicallytheseare0.335"(8.5mm)tall,butyoumaypickatalleroneifdesired.WhenyousearchforpartsliketheseitcanbedifficulttonavigatethethousandsofpartsavailableonlinesohereareafewgoodchoicesforthePhoton:

Description MFG MFGPartNumber Distributor

12-pin0.1"FemaleHeader(Tin) SullinsConnectorSolutions PPTC121LFBN-RC Digikey

12-pin0.1"FemaleHeader(Gold) SullinsConnectorSolutions PPPC121LFBN-RC Digikey

12-pin0.1"FemaleHeader(Tin) Harwin M20-7821246 Mouser

Youmayalsouseothertypes,suchasreversemounted(bottomsideSMT)femaleheaders,lowprofiletypes,etc..

ThePhoton(withheaders)canbemountedwith0.1"12-pinfemaleheaderreceptaclesusingthefollowingPCBlandpattern:

APhotonwithheaderspartforEAGLEcanbefoundintheParticleEAGLElibrary

DIMENSIONSANDWEIGHT

MATINGCONNECTORS

RECOMMENDEDPCBLANDPATTERN(PHOTONWITHHEADERS)

ThePhoton(withoutheaders)canbesurfacemounteddirectlyinanendapplicationPCBusingthefollowingPCBlandpattern:

TOPTHROUGHVIEW

Inadditiontothe24pinsaroundtheoutsideofthePhoton,thereare7padsonthebottomthePhotonPCBthatcanbeusedtoconnecttoextrasignals:RGBLEDoutputs,SETUPbutton,SMPSenablelineandUSBD+/D-.PhotonPins#25-31aredescribedinthePinoutdiagrams.

Soldermaskaroundexposedcopperpadsshouldbe0.1mm(4mils)largerinalldirections.E.g.,a0.08"x0.10"padwouldhavea0.088"x0.108"soldermask.

APhotonwithoutheaderspartforEAGLEcanbefoundintheParticleEAGLElibrary

RECOMMENDEDPCBLANDPATTERN(PHOTONWITHOUTHEADERS)

Schematic

SCHEMATIC-USB

SCHEMATIC-POWER

SCHEMATIC-USERI/O

SCHEMATIC-RF

SCHEMATIC-PØWI-FIMODULE

Layout

PHOTONV1.0.0TOPLAYER(GTL)

PHOTONV1.0.0GNDLAYER(G2L)

PHOTONV1.0.03V3LAYER(G15L)

PHOTONV1.0.0BOTTOMLAYER(GBL)

Recommendedsolderreflowprofile

Phase TemperaturesandRates

A-B. Ambient~150°C,Heatingrate:<3°C/s

B-C. 150~200°C,soaktime:60~120s

C-D. 200~245°C,Heatingrate:<3°C/s

D. Peaktemp.:235~245°C,Timeabove220°C:40~90s

D-E. 245~220°C,Coolingrate:<1°C/s

BillofMaterials

Qty DeviceMinimum

Specification Package/Case PartDesignator MFG. MFG.PN

1 ANTENNA 2.4GHzCeramic5.0mm×2.0mmx2.6mm

ANT1AdvancedCeramic

XAT7020-E3R0HBA

2CERAMIC

CAPACITOR22uFCeramic6.3V

10%X5R0603 C4,C5 Samsung CL10A226MQ8NRNC

6CERAMIC

CAPACITOR0.1uFCeramic6.3V

10%X5R0402 C6,C7,C8,C11,C12,C16 RongFu 0402B104K01A

2CERAMIC

CAPACITOR100pFCeramic6.3V

10%X5R0402 C2,C3 Fenghua 0402CG101J500NT

4CERAMIC

CAPACITOR10uFCeramic6.3V

10%X5R0603 C9,C11,C13,C15 Sumsung CL10A106MQ8NNNC

3CERAMIC

CAPACITOR(RF)

10pFCeramic6.3V10%X5R

0402 C1,C14,C17 Murata GJM1555C1HR80BB01D

1 CONNECTORUSBMicro-Bw/tabs

&slotsUSB-MICROB X1 Kaweei CMCUSB-5BFM2G-01-D

1 CONNECTOR uFLConnector SMD X2 Kaweei P1163-0140R

2 HEADERSingleString1.2"MatingLength

0.1"12-pin JP1,JP2 Kaweei CP25411-12G-S116-A

1 DIODEDiodeSchottky30V

3ADO-220AA D1 Vishay SS3P3-M3/84A

1 DIODE(LED) Blue SMD0603 LED1 Everlight19-217/BHC-ZL1M2RY/3T

1 DIODE(LED)LEDRGBCommonAnodeDiffused

SMD

4-PLCC(2.0mmx2.0mm)

LED2 CreeCLMVB-FKA-

CFHEHLCBB7A363

1 INDUCTOR 2.2uH1.5A 3mmx3mm L4TaiyoYuden

NR3015T2R2M

1INDUCTOR

(RF)3.9nHRFinductor 0402 L3 Johanson L-07C3N9SV6T

1INDUCTOR

(RF)4.7nHRFinductor 0402 L1 Johanson L-07C4N7SV6T

1INDUCTOR

(RF)6.8nHRFinductor 0402 L2 Johanson L-07C6N8JV6T

1 WI-FI+MCUBroadcomWi-FI+STM32F205RGY6

MCU

CustomUSISMD

U1 USI WM-N-BM-09-S

1 RFSWITCH RFSwitchSPDTUQFN-6(1x1mm)

U3 Skyworks SKY13350-385LF

1POWER

REGULATOR

3.3V1.5MHz600mAHighEfficiencyPWMStep-DownDC/DCConverter

SOT23-5 U2 Richtek RT8008-33GB

1 RESISTOR 100k5% 0402 R4 Fenghua RC-02W104FT

2 RESISTOR 22R5% 0402 R5,R6 Fenghua RC-02W220JT

1 RESISTOR 10k5% 0402 R8 Fenghua RC-02W103JT

4 RESISTOR 1k5% 0402 R1,R2,R3,R7 Fenghua RC-02W102JT

2 SWITCH Button160gf3.6mmx3.1mm

SETUP,RESET Haoyu TS-1185A-C

BUILDYOUROWNDESIGNBASEDONTHEPHOTON!

Orderinginformation

Photonsareavailablefromstore.particle.ioinsinglequantitieswithandwithoutheaders,andalsoincludedindifferentmakerkits.

Qualificationandapprovals

PhotonwithHeaders

ModelNumber:PHOTONHRoHSCEFCCID:2AEMI-PHOTONIC:20127-PHOTON

PhotonwithoutHeaders

ModelNumber:PHOTONNOHRoHSCEFCCID:2AEMI-PHOTONIC:20127-PHOTON

Producthandling

ThePhotoncomesintwoprimarystylesofpackaging:MatchboxandKitBox.Thematchboxpackagingcontainsthebareessentialstogetyoustarted,whilethePhotonKitcontainsabreadboard,MicroBUSBcable,sticker,prototypingcardandacouplesensorstobuildyourfirstInternetconnectedproject!

PhotonswithoutheadersinmatchboxpackagingarealsoavailableinJEDECstyletraysforautomatedpickandplacemachines.RequestmoredetailsfromusonthisintheContactsectionbelow.

TheMoistureSensitivityLevel(MSL)relatestothepackagingandhandlingprecautionsrequired.ThePØmoduleonthePhotonsdominatetheMSLrequirementsandareratedlevel3.Ingeneral,thisprecautionappliesforPhotonswithoutheaders.IfreflowingaPhotondirectlyontoanapplicationPCB,increasedmoisturelevelspriortoreflowcandamagesensitiveelectronicsonthePhoton.Abakeprocesstoreducemoisturemayberequired.

Formoreinformationregardingmoisturesensitivitylevels,labeling,storageanddryingseetheMSLstandardseeIPC/JEDECJ-STD-020(canbedownloadedfromwww.jedec.org).

ThephotoncontainshighlysensitiveelectroniccircuitryandisanElectrostaticSensitiveDevice(ESD).HandlingaphotonwithoutproperESDprotectionmaydestroyordamageitpermanently.ProperESDhandlingandpackagingproceduresmustbeappliedthroughouttheprocessing,handlingandoperationofanyapplicationthatincorporatesphotons.ESDprecautionsshouldbeimplementedontheapplicationboardwherethephotonismounted.Failuretoobservetheseprecautionscanresultinseveredamagetothephoton!

PACKAGING

MOISTURESENSITIVITYLEVELS

ESDPRECAUTIONS

Defaultsettings

ThePhotoncomespreprogrammedwithabootloaderandauserapplicationcalledTinker.ThisapplicationworkswithaniOSandAndroidappalsonamedTinkerthatallowsyoutoveryeasilytoggledigitalpins,takeanaloganddigitalreadingsanddrivevariablePWMoutputs.

Thebootloaderallowsyoutoeasilyupdatetheuserapplicationviaseveraldifferentmethods,USB,OTA,SerialY-Modem,andalsointernallyviatheFactoryResetprocedure.Allofthesemethodshavemultipletoolsassociatedwiththemaswell.

YoumayusetheonlineWebIDEParticleBuildtocode,compileandflashauserapplicationOTA(OverTheAir).ParticleDevisalocaltoolthatusestheCloudtocompileandflashOTAaswell.Thereisalsoapackage SparkDFU-UTIL forParticleDevthatallowsforCloudcompilingandlocalflashingviaDFUoverUSB.Thisrequires dfu-util tobeinstalledonyoursystem.'dfu-util'canalsobeusedwithParticleCLIforCloudcompilingandlocalflashingviathecommandline.FinallythelowestlevelofdevelopmentisavailableviatheGNUGCCtoolchainforARM,whichofferslocalcompileandflashviadfu-util.Thisgivestheusercompletecontrolofallsourcecodeandflashingmethods.Thisisanextensivelist,howevernotexhaustive.

GlossarySMPS

Switched-ModePowerSupply

RF

RadioFrequency

Castellated

TheedgeofthePCBhasplatedholesthatarecutinhalfwhichresemblethetopofacastle.ThesemakeiteasytosolderthePhotondowntoanotherPCBwithaSMTreflowprocess.

SMT

SurfaceMountTechnology(oftenassociatedwithSMDwhichisasurfacemountdevice).

AP

AccessPoint

LED

Light-EmittingDiode

RGBLED

RedgreenandblueLEDscombinedanddiffusedinonepackage.

USB

UniversalSerialBus

Quiescentcurrent

Currentconsumedinthedeepestsleepstate

FT

Five-tolerant;Referstoapinbeingtolerantto5V.

3V3

+3.3V;Theregulated+3.3Vsupplyrail.Alsousedtonoteapinisonly3.3Vtolerant.

RTC

RealTimeClock

OTA

OverTheAir;describinghowfirmwareistransferredtothedevice.

FCCICCEWarningsandEndProductLabelingRequirements

FederalCommunicationCommissionInterferenceStatementThisequipmenthasbeentestedandfoundtocomplywiththelimitsforaClassBdigitaldevice,pursuanttoPart15oftheFCCRules.Theselimitsaredesignedtoprovidereasonableprotectionagainstharmfulinterferenceinaresidentialinstallation.Thisequipmentgenerates,usesandcanradiateradiofrequencyenergyand,ifnotinstalledandusedinaccordancewiththeinstructions,maycauseharmfulinterferencetoradiocommunications.However,thereisnoguaranteethatinterferencewillnotoccurinaparticularinstallation.Ifthisequipmentdoescauseharmfulinterferencetoradioortelevisionreception,whichcanbedeterminedbyturningtheequipmentoffandon,theuserisencouragedtotrytocorrecttheinterferencebyoneofthefollowingmeasures:

Reorientorrelocatethereceivingantenna.Increasetheseparationbetweentheequipmentandreceiver.Connecttheequipmentintoanoutletonacircuitdifferentfromthattowhichthereceiverisconnected.Consultthedealeroranexperiencedradio/TVtechnicianforhelp.

FCCCaution:Anychangesormodificationsnotexpresslyapprovedbythepartyresponsibleforcompliancecouldvoidtheuser'sauthoritytooperatethisequipment.ThisdevicecomplieswithPart15oftheFCCRules.Operationissubjecttothefollowingtwoconditions:

1. Thisdevicemaynotcauseharmfulinterference,and2. Thisdevicemustacceptanyinterferencereceived,includinginterferencethatmaycause

undesiredoperation.

FCCRadiationExposureStatement:ThisequipmentcomplieswithFCCradiationexposurelimitssetforthforanuncontrolledenvironment.Thistransmittermodulemustnotbeco-locatedoroperatinginconjunctionwithanyotherantennaortransmitter.ThisEndequipmentshouldbeinstalledandoperatedwithaminimumdistanceof20centimetersbetweentheradiatorandyourbody.

IMPORTANTNOTE:Intheeventthattheseconditionscannotbemet(forexamplecertainlaptopconfigurationsorco-locationwithanothertransmitter),thentheFCCauthorizationisnolongerconsideredvalidandtheFCCIDcannotbeusedonthefinalproduct.Inthesecircumstances,theOEMintegratorwillberesponsibleforre-evaluatingtheendproduct(includingthetransmitter)andobtainingaseparateFCCauthorization.

EndProductLabelingThefinalendproductmustbelabeledinavisibleareawiththefollowing:

ContainsFCCID:2AEMI-PHOTON

ManualInformationtotheEndUserTheOEMintegratorhastobeawarenottoprovideinformationtotheenduserregardinghowtoinstallorremovethisRFmoduleintheuser’smanualoftheendproductwhichintegratesthismodule.

CanadaStatementThisdevicecomplieswithIndustryCanada’slicence-exemptRSSs.Operationissubjecttothefollowingtwoconditions:

1. Thisdevicemaynotcauseinterference;and2. Thisdevicemustacceptanyinterference,includinginterferencethatmaycauseundesired

operationofthedevice.

LeprésentappareilestconformeauxCNRd’IndustrieCanadaapplicablesauxappareilsradioexemptsdelicence.

L’exploitationestautoriséeauxdeuxconditionssuivantes:

1. l’appareilnedoitpasproduiredebrouillage;2. l’utilisateurdel’appareildoitacceptertoutbrouillageradioélectriquesubi,mêmesilebrouillage

estsusceptibled’encompromettrelefonctionnement.

CautionExposure:Thisdevicemeetstheexemptionfromtheroutineevaluationlimitsinsection2.5ofRSS102anduserscanobtainCanadianinformationonRFexposureandcompliance.Ledispositifrépondàl'exemptiondeslimitesd'évaluationderoutinedanslasection2.5deRSS102etlesutilisateurspeuventobtenirdesrenseignementscanadienssurl'expositionauxRFetlerespect.

Thefinalendproductmustbelabelledinavisibleareawiththefollowing: TheIndustryCanadacertificationlabelofamoduleshallbeclearlyvisibleatalltimeswheninstalledinthehostdevice,otherwisethehostdevicemustbelabelledtodisplaytheIndustryCanadacertificationnumberofthemodule,precededbythewords“Containstransmittermodule”,ortheword“Contains”,orsimilarwordingexpressingthesamemeaning,asfollows:

ContainstransmittermoduleIC:20127-PHOTON

ThisEndequipmentshouldbeinstalledandoperatedwithaminimumdistanceof20centimetersbetweentheradiatorandyourbody.Cetéquipementdevraitêtreinstalléetactionnéavecunedistanceminimumde20centimètresentreleradiateuretvotrecorps.

Theendusermanualshallincludeallrequiredregulatoryinformation/warningasshowninthismanual.

Revisionhistory

Revision Date Author Comments

-30-March-

2015BW Initialrelease

v003 7-April-2015 BW Updatedtemplate

v0048-April-2015

BW UpdatedOverview,Blockdiagram,Power,RF,andPinmarkingssections

v0059-April-2015

BW UpdatedBOM

v00621-April-2015

BWAddedJTAG,BTCO-EX,I/OCharacteristics,Schematic,Layout,ReflowProfile,Glossary,UpdatedOperatingConditions

v00728-April-2015

BWAddedLayout,Updatedanalogpins,Landpatterns,Packaging,MatingConnectors

v008 11-May-2015 BW UpdatedBTCO-EX,PWMinfo,Qualifications

v00931-May-2015

BWUpdatedPinouts,DACinfo,Heightdimensions,Soldermaskinfo,Recommendedoperatingconditions

v010 1-June-2015 BW UpdatedVBATinfo

v01124-July-2015

BWAddedFCCICCEWarningsandEndProductLabelingRequirements,Updatedpoweroutput,addedapprovedantennas,CorrectedDAC2asA3,AddedpinnumberstoPCBLandPatternforPhotonwithoutheaders.

v01215-January-

2016WH

AddedTELECCertificationinformationandexpandedexplanationofPhotonswithandwithoutheaders.

v013 7-April-2016 BW

Added:fullSTM32partnumber,Memorymap,DAClimits,SWDpinlocations,maxsource/sinkcurrent,moredescriptiveinfoaboutbottomsidepads,knownerrataURL.Updated:BTCOEXinfo,pindiagram,blockdiagram,operatingconditions,pindescriptions,land-patternimagesignalkeepoutnote.

v01413-

September-2016

BW UpdatedMatingconnectorssection.

v01525-July-2017

BWUpdatedthePinDescriptionsectionandaddedhighresolutionpinoutPDF,PWMnotesandDCTlayout,addedwarningtopowersection

KnownErrata

Wearetrackingknownerratawiththisdatasheethere.Theseissues/errorsinthedatasheetwillberesolvedinsubsequentrevisions.

Contact

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Email

hello@particle.io