MTK手机基带各种电路的分析和介绍

1BaseBandCircuitIntroductionbasedonMT6219•4ChipselectPins:(CS0~3)/CS0forNorflash/CS1forpSRAM/CS2.SubLCMorMelodyIC(NC)/CS3.MainLCMWehaveverifymanyMCPsupplier’sparts,includingSpansion,Toshiba,Renesas,Intel..Payattentionto:RenesasnordieorintelTyax:/WP-GNDOthersnordie:/WP-Vmen[1..23]/ECS0_FLASH/CE_F2EA23R3500123R303ncR302ncU302NC7SV19,NC7SZ19,NL7SZ19-D123456AGND/EY1VccY0•R350isajumperforoptionthedifferentpackageMCP•InordertosupporttwodieFlashMCP.•UseEA23decidewhichdieselected.•If64Mbonly,R303=0ohmandU302andR302NC•FortheGPRSandmulti-mediaapplication,wesuggesttousetheMCPwithpagemode.•8bitNFIinterface•NFIinterfacepowersupplyisVDD•R/#B(Ready/Busy)pinpulledhigh(47K)•1CScansupport8Gbits•1bitECCSLCdevice•Payattention:/WP-/SYSRST[0:9]isinternalpulldownReverseCAPorVaristorArrayforESD,CDshouldlowerthan33pF•Suggestion:ParallelNFIinterfacefortheMain/SubdualLCMLCDControllerOn-ChipMemoryParallelLCDInterface(NFI)SerialLCDInterfaceExternalmemoryInterface•LPCE#[2:0]•LRST#•LRD#•LPA0•LWR#•NLD[7:0]•LSCK•LSA0•LSDA•LSCE0#•LSCE1#•ERD#•EWR#•ECS[7:0]•ED[15:0]•EA[25:0]8080type8bit8or9bit8080/6800type8/16bit•ProvidetwopinstocontrolBLon/offandbrightness1.GPIOenable2.PWMdimmingcontrol(Max)VBATGPIO13_GENGPIO0_REN/DAICLKGPO3_BENR15100KR10100KTP3D1LTST-C19GD2WT-G1234R533TP1R14100KT5VCE(MLVS0402M07)12..G1S2G2D2S1D1U4FDG6303N163452G1S2G2D2S1D1U5FDG6303N163452R433R3100TP2RGB8mils8mils=2.2VMICBIASN=0.3VSingle-endmode:MICBIASP=1.9VMICBIASN=0VC218,C219,L202andL203arefornoisereductionC1,C2,C3,B1andB2arefornoisereduction•Highpassfilterfc=1/2*pi*Rin*Cin=1/2*pi*22n*20K=80Hz•C218/C220bypasscapforpowersupplyfiltering•C217/C219bypasscapforhalf-supplyfiltering•ExternalOPgain=100K/20K=14dB•GPO1is0duringSysreset•SuggestaddBEADonLouderSpeakertraces(EINT0_HEADSET)4.ADC5forsend-endKeydetection–UsetwodualtransistorstostrengthentheESDprotectioninthesidekey.–IfnoESDissue,shortR245andR246toreducecomponents.VBATKBR0KBC2KBR0KBC3KBR0S220SIDE-SW:LS11N212345ESD141212R245ncR246ncESD131212T207VCE(MLVS0402M07)12..T206VCE(MLVS0402M07)12..T205VCE(MLVS0402M07)12..U205EMD6162345ESD121212R2470123U206EMD6162345S219SIDE-SW:LS11N212345RN201100K(8P4R)12345678Case1Case2KROW0T300VCE12..ESD3191212[VOL_UP]S309SIDE-SW:LS11N212345T301VCE12..KCOL1ESD3141212•“Lowlevel”onthePWRKEYpinofthePMICtoturnontheLDOs•Softwaremustcheckwhetheritis“powerkey”thenshownormalpoweronMMI.VBATBBKBR0KBC4PWRKEYR328100KTP307S300KSW12U306EMD6162345[POWERON/OFF,END]•MT6205•MT6218[PWRON/OFF][END]SW400KSW12D400RB520S-3012KCOL6PWRKEY•Keypad–7columns(Input)x6rows(Output)–Detectoneortwokey-pressedsimultaneously–Softwareonlysupportsonekeydetectionnow.KeypadmatrixScannerStatemachineKP(NIRQ)KeyindexSetde-bouncetimeKeypressedKeyreleasedCOL6COL5COL4COL3COL2COL1COL0ROW5ROW4ROW3ROW2ROW1ROW0111110111111111111111111111111100000100000•PRGpin“Low”:magnetcloseàEINTgoes“H”•magnetopenàEINTgoes“L”VDDEINT2_CLAMDETR221ncC21610pR217ncC215100nU203TLE4917123456VSGNDQGNDGNDPRGEINT2NormalLow,HighActiveChange47Ktonc2004/1/5clamshellCLOSE(EINT2H)clamshellOPEN(EINT2L)(1A0603)TP313C307ncTP315U301SI483312783456AAKKSGDDR31624KR3170.33(1%08051/4W)C3484.7u(0805X5R10V)C304ncC3031u(0805Y5V16V)RN301100K(1%)12345678BT300BATTERYCONN.1234VBATBATDETTEMPGNDADC0_I-ADC3_I+1.ADC0,ADC3forchargingcurrentsensingandbatteryvoltagemonitor2.ADC1forbatterytemperaturemonitor3.NeedCalibration:3.4Vand4.2V(6.3VK0603X5R)U402APL515133BI32451/SHDNGNDBPVOUTVINC4181u(6.3VK0603X5R)C41910n•WithoutexternalUSBtransceiverforUSBport.•SupportUSB1.1andMicrosoftWindowsdrivercompatible•DividetheUSB_PWR(5V)byR419andR420tocreateEINT3signal(mustover0.8*2.8V=2.24).35uAleakagecurrent.“Trade-off!”•3.3VLDOtoprovideVUSBpowertoBBUSBblock•ShorttheUSB_PWRandCHRpinsintheUSBcable!Reason1:ChargingpoweronthehandsetwhenUSBpluggedinReason2:BBcanhandletheUSBchargingfunction(Option)T309MLVS0603K1412..USBPOWEREINT3_USB1R4192.2KR4202.7KESD3351212USB_PWRD300RB520S-3012–InputmodeADC4_USB2V:USB2V: