nxp公司的aerofone单片gsm/gprs低成本多媒体解决方案pnx4903能以超低成本实现带彩色屏的音乐手机.这种单芯片解决方案集成了模拟和数字基带,rf收发器,功率管理以及音频电路.唯一的外接元件是功率放大器和存储器.完整的双频段gsm/gprs调制解调器可以采用低成本的4层pcb做成,仅需要49个元件.本文介绍了pnx4903的主要性能以及多媒体手机的方框图.

　　aerofonesingle-chipgsm/gprslow-costmultimediasolution
thenxpaerofonepnx4903enablesamusicphonewithcolorscreenintheultra-low-costmarketsegment.byintegratingtheanaloganddigitalbasebands,rftransceiver,powermanagement,andaudiocircuitryinasinglemonolithicic,thepnx4903solutiondeliversthesmallestbillofmaterialsandpcbfootprint,alongwiththelowestmanufacturingandtestcosts.

　　theonlyexternalicsneededareapoweramplifierandmemory.acomplete,dual-bandgsm/gprsmodemcanberealizedwithjust49externalcomponentsonalow-costfour-layerpcb.traditionalmulti-chiphandsetdesignsrequirethreetimesthenumberofexternalcomponentsonamorecomplexpcb.

　　thehardwarereferencedesignisaccompaniedbyaflexible,pre-integratedandvalidatedsoftwarecomplementthatreducesr&dexpenseandspeedstime-to-market.

　　主要特性:

　　completegsm/gprssolutioninasinglemonolithicic
　　gsmphase2+compliant
　　lowpower,high-performance0.13-mcmosprocess
　　industry-leadingarm926-ejsmcucore
　　high-performancedspcore
　　saicsupportforincreasednetworkcapacity
　　integratesallthesramforavoice-centricphone
　　completelyintegratedrftransceiver
　　dual-bandrxandtx(850or900/1800or1900)
　　proven,industry-leadingaeroiitechnology
　　best-in-classperformance
　　completepowermanagementunit(pmu)subsystem
　　integratedbattery-chargingcircuitry
　　integratesallvoltageregulators(ldosanddc/dc)
　　integratedaudiosubsystem
　　mp3playbackwithsupportforsdcard
　　40voicepolyphonicmidi+mp3ringtones
　　microphoneamplifierwithtwodifferentialinputs
　　twodifferentialaudiooutputamplifiers
　　hr/fr/efr/amrvocoders
　　alternate40-ks/saudiomodeforpolyphonicringtones
　　speakerphonenoisesuppressionandechocancellation
　　optimized,flexiblesystemcontrol
　　integrated26-mhzdcxo(onlyneedxtal)
　　integrated32-khzrtcoscillator(onlyneedxtal)
　　flexiblemodesforoptimizedpowerconsumption
　　comprehensivesetofperipheralfunctions
　　standardpackage
　　10x10mmplasticballgridarray(pbga)
　　rohs-compliant

pnx4903方框图: