NXP公司的AeroFONE單片GSM/GPRS低成本多媒體解決方案PNX4903能以超低成本實(shí)現(xiàn)帶彩色屏的音樂(lè)手機(jī).這種單芯片解決方案集成了模擬和數(shù)字基帶,RF收發(fā)器,功率管理以及音頻電路.唯一的外接元件是功率放大器和存儲(chǔ)器.完整的雙頻段GSM/GPRS調(diào)制解調(diào)器可以采用低成本的4層PCB做成,僅需要49個(gè)元件.本文介紹了PNX4903的主要性能以及多媒體手機(jī)的方框圖.

　　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方框圖: