MTK手机电路原理分析

MTK•MTK6229BBTranseiverMT6140PA3159•62296230CAMERA6229200623030•622962266225BB6229DSPEDGE6229104MHZBB52MHZ6229OTG,TVOUT,WI-FI•OTGUSB1.1OTG20CM•622932.768KHZ32.768kHzRTC32.76832768215RTC32.76813MHz13M•MTKFLASHMTKNOR+NAND•NORNANDNORBIOSNAND()RAMNAND•SRAMNANDNANDNANDNORMICMICBIASPMICBIASNMIC2.4V-2.7VC204C205GSM900MHZ33PFDCS1800MHZ12PFWIFI2.4GHZ8.2PFC206C201,C202100NFPA100HZB201B202MICMICBIASP----MICBIASNGNDGNDMICC1C2CRLOUTPUTGROUNDVSTERM1TERM2ShieldcaseC1=10pfC2=33PFRL=2.2KVS=2.0VCP•Mic,,MicMic•CPC1C2900MHZ1800MHZ47K-190K75KBBVDD2.8VVDD100KEINT0.2-0.3VABCABCEINTBB643216MTK32100K0.1VC0.1+0.2=0.3EINTBBXMICADCMICBIOSMICBIOSADC1.ADC1V2.EINRightLeftMICGND,MICGNDXMICGNDADCMP3•MTKDC243,C244,C245MIC900MHZ1800MHZVBATL20433pf•PA7-8PAR255,R25647K/PA10K*2=9.4•D(PWM)(PCM)()LCDABD•AB2•B“”B18021803602180•AABFMFM_LOUT,FM_ROUTBBGPIO42_FM_SDAGPIO41_FM_SCLCLKGPIO09_FM_BUSENFMT-FLASH•TFCLK24MHZ262512MHZCLKTF-CMDTTF-CMDTF-DAT-0123•HSP301-HSP307TVSESD““““““I/OCONNECTOR•USB1.4V,1.4V,VUSB3.3V20-30mAUTXD1URXD1•MTKGPIO63-USBIDOTGGPIO63-USBID•9PINFMB302FM98MHZ12K•ESDTR301ADC2VchargerUSBI/OUSBUSB-DMUSB-PWRVUSB3.3VADC4-USBUSB-DMUSBUSB-DMD30615KVD306BBPMICLDOLDOLDORESETVBAT3.8V2.8VKCOL6POWERBBWakeupVCOREVMemoryVDD0.3VVCOREVMENVDDISRESETKCOL6BBBBWakeupHOLDLDOSIMSIM•••PMICSIM•CHR_CTLSIMVCC,SIMSEL,SIMRST,SIMCLK,SIMDATABB1.8V3.0V,PWIC-SRSTSIM1.8VSIM3.0VSIMCLK3.25MHZSIMVCCSIMSIMSEL1.8V3.0VSIMRSTSIMRESTSIMCLK3.25MHZCLKSIM•C403RESETLDORESETC403•EINT2_CHARGEREINT2_CHARGER3.2VGPIO5_CHR_CRL•VCORE251.8V1.2V261.8V29301.2V•232652MHZ252930104MHZLDO()•(LDO)1-1VTR1R2AAUrefAUoutUoutMOSFET••••5(LoadRegulation)2-12-1LDOLDOVload—Imax—LDOVt—ImaxLDOVo—0.1mALDOV—0.1mAImaxVBATPMICPWMBB•BBPWMMOSVBATPWMMOSPWMPWM2.8V2K20K•PWM2_VIB_ENPMICVIB_DRVR409RD403VCHGVCHGPMICCHG_ENBBCHG_EINADC0ADCBattery100K100K100K100KR0.39ISENSEGSD•VCHG_USB_PWR5VBBADC3_VCHG8.3VCHRIN•EINT2_CHARGERBBCHG_ENGATEDRVPMOFETIMOSVGS=-2.5VVGS=-1.5VVGS=-2.0VVGSMOS0.5V(ADC0-ADC)/R=IBatteryBB•CHG_ENVGS=0VMOSVCHGISENSE0.01V/0.39ohm=25mA3.2VLDOBBCHG_ENGATEDRV5V3.5VPMOSFET•ISENSE160mVGDGD•BB•ADCBattery3.8VADC11.9V1.8VOffsetOK•I/OUSBCHG_USB_PWR=5VBBADC4_USBVUSB3.3VADC4_USB=3.3V*470K/(100K+470K)•USB15KR309470KR308100KRTC&CAMERAGB401R4061.5VCAM_VSYNCCAM_HREFCAM_XCLKBBCAM13MHZCAM_PCLKCANBB6.5MHZBLUETOOTHBTMTK6601BT32MHZ32.768KHZTouchpanelXY100KXYVDD100KXYXYXRtouchXYX+X-Y+X+XYRtouchXYY+Y-X+Y+Y()RtouchXYY+X-Y-Y+X-RtouchRtouch