AR9287DS

COMPANYCONFIDENTIAL•1DataSheet©2009-2010byAtherosCommunications,Inc.Allrightsreserved.Atheros®,AtherosDriven®,Align®,AtherosXR®,DrivingtheWirelessFuture®,Intellon®,NoNewWires®,Orion®,PLC4Trucks®,Powerpacket®,SpreadSpectrumCarrier®,SSC®,ROCm®,SuperA/G®,SuperG®,SuperN®,TheAirisCleanerat5-GHz®,Total802.11®,U-Nav®,WakeonWireless®,WirelessFuture.UnleashedNow.®,andXSPAN®,areregisteredbyAtherosCommunications,Inc.AtherosSST™,Signal-SustainTechnology™,Ethos™,InstallNGo™,IQUE™,ROCm™,amp™,Simpli-Fi™,ThereisHere™,U-Map™,U-Tag™,and5-UP™aretrademarksofAtherosCommunications,Inc.TheAtheroslogoisaregisteredtrademarkofAtherosCommunications,Inc.Allothertrademarksarethepropertyoftheirrespectiveholders.Subjecttochangewithoutnotice.February2010AR9287Single-Chip2x2MIMOMAC/BB/RadiowithPCIEInterfacefor802.11n2.4GHzWLANsGeneralDescriptionTheAtherosAR9287isahighlyintegratedsingle-chipsolutionfor2.4GHz802.11n-readyWLANstoenablehigh-performance2x2MIMOconfigurationsforapplicationsdemandingrobustlinkqualityandmaximumthroughputandrange.TheAR9287integratesamulti-protocolMAC,basebandprocessor,analog-to-digitalanddigital-to-analog(ADC/DAC)converters,2x2MIMOradiotransceiverincludingLNA,PA,andRFswitch,andPCIExpressinterfaceinanall-CMOSdeviceforlowpowerandsmallformfactorapplications.TheAR9287implementshalf-duplexOFDM,CCK,andDSSSbasebandprocessing,supportingupto150Mbpsfor20MHzand300Mbpsfor40MHzchanneloperationsrespectively,andIEEE802.11b/gdatarates.Additionalfeaturesincludesignaldetection,automaticgaincontrol,frequencyoffsetestimation,symboltiming,andchannelestimation.TheAR9287MACsupportsthe802.11wirelessMACprotocol,802.11isecurity,receiveandtransmitfiltering,errorrecovery,andqualityofservice(QoS).TheAR9287supportstwosimultaneoustrafficstreamsusinguptotwointegratedtransmitchainsandreceivechainsforhighthroughputandrangeperformance.Transmitchainscombinebasebandin-phase(I)andquadrature(Q)signals,convertthemtothedesiredfrequency,anddrivetheRFsignaltomultipleantennas.ReceivechainsconvertRFsignaltobasebandIandQoutputs.Thefrequencysynthesizersupportsone-MHzstepstomatchfrequenciesdefinedbyIEEE802.11b/g/nspecifications.TheAR9287supportsframedatatransfertoandfromthehostusingaPCIEinterfaceprovidinginterruptgenerationandreporting,powersave,andstatusreporting.OtherexternalinterfacesincludeserialEEPROMandGPIOs.TheAR9287operateswithstandardlegacy802.11b/gdevices.Features■All-CMOSMIMOsolutioninteroperablewithIEEE802.11b/g/nWLANs■2x2MIMOtechnologyimproveseffectivethroughputandrangeoverexisting802.11b/gproducts■IntegratedLNAs,PAs,andRFswitcheseliminatetheneedforexternalfront-endmodules■Supportsspatialmultiplexing,cyclic-delaydiversity(CDD),andmaximalratiocombining(MRC)■2.4GHzWLANMAC/BBprocessing■BPSK,QPSK,16QAM,64QAM,DBPSK,DQPSK,andCCKmodulationschemes■Dataratesofupto150Mbpsfor20MHzchannelsand300Mbpsfor40MHzchannels■WirelessmultimediaenhancementsforQoS■802.11e-compatiblebursting■SupportforIEEE802.11e,h,andistandards■WEP,TKIP,andAEShardwareencryption■20and40MHzchannelization■PCIE1.1compliant■Supportfor2–3wireBluetoothcoexistence■Reduced(short)guardinterval■Frameaggregation■BlockACK■IEEE1149.1standardtestaccessportandboundaryscanarchitecturesupported■9mmx9mm76-pinLPCCpackageAR9287SystemBlockDiagram2�AR9287Single-Chip2x2MIMOMAC/BB/Radiofor802.11nWLANsAtherosCommunications,Inc.2�February2010COMPANYCONFIDENTIALAtherosCommunications,Inc.AR9287Single-Chip2x2MIMOMAC/BB/Radiofor802.11nWLANs�1COMPANYCONFIDENTIALFebruary2010�1TableofContentsGeneralDescription........................................1Features............................................................1AR9287SystemBlockDiagram....................11PinDescriptions............................12FunctionalDescription.................72.1Overview...................................................72.1.1ConfigurationBlock.....................72.1.2AR9287AddressMAP.................72.1.3SerialEEPROMInterface.............82.1.4EEPROMAuto-SizingMechanism82.1.5EEPROMRead/WriteProtectionMechanism.....................................82.2Reset...........................................................82.3GPIO..........................................................82.4LED............................................................82.5PCIExpressHostInterface.....................92.5.1PCIExpressRegisters..................92.6SignalDescription....................................92.7HostInterfaceUnitInterrupts................93MediumAccessControl(MAC)113.1Overview.................................................113.2Descriptor................................................113.3DescriptorFormat..................................123.4QueueControlUnit(QCU)..................283.4.1DCFControlUnit(DCU)...........283.5ProtocolControlUnit(PCU)................284DigitalPHYBlock.......................294.1Overview.................................................294.2802.11n(MIMO)Mode..........................294.2.1Transmitter(Tx)..........................294.2.2Receiver(Rx)...............................294.3802.11b/gLegacyMode........