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1、MT8222_P1V1_DDR1_VERSIONV1.0_DDR1WITHTERMINATION_GPIOusageGPIODefinitionFunctiondefineADIN0SCARTFSLVDSoutSFlashADIN1SCARTFSADIN24052SWITCHE2PROMADIN3KEYPADAnalogAMPSpeakerADIN4KEYPADPOWERTI3101D_10Wx2_DDR1DACADIN5HDMI/VGAEDIDE2PROMWPHigh=WPdisableGPIO_20MT
2、82224558HeadphoneAudioMUXGPIO_21AMP_MUTECONTROLHigh=MuteonGPIO_22GAMEMCUWT6702GPIO_23GAMEGPIO_24GAMEGPIO_25GAME4052x2PWM0DIMMINGCONTROLUSBx2PWM1Powerconversionto33VPWM2SYSTEME2PROMWPHigh=WPdisablePWM3AudioMUXUP30BLON/OFFCONTROLLow=BacklightonYPbPrx2Micphon
3、eCVBSxRFTunerUP31NORMALPOWERON/OFFLow=NormalpoweronVGAHDMIx3Scartx2Interface2TDA9885UP33HMDI0HPLUGDETECTS-VideoxUP34HMDI1HPLUGDETECT1UP35HMDI2HPLUGDETECTGPIO_0MICPHOTORESERVEGPIO_1LVDSRESERVEDPowerDistributionGPIO_2FCIGPIO_3FCIGPIO_4LVDSPOWERON/OFFHi=LVDSp
4、oweronGPIO_5AMP_SD/FCIGPIO_6SCART1VIDEOOUTPUTSW/FCIGPIO_7FCIGPIO_8FCIGPIO_9FCIGPIO_10FCIGPIO_114052SWITCHLow=HPinsertINTAudioMUXselectbit0SPDIFINLVDSRESERVEDAOSDATA0USB0OCTAGAOLRCKUSB0PWRENABLEAOBCLKUSB1PWRENABLEAOMCLKUSB1OCTAG1、主板电路框图、GPIO口说明5V_MMAINPOWER
5、+5V_ONVPA+5VSCN1L6512CN211206/121+5VS11CB16+C470+5VS6,7,822220uF/16V+5VSD188+3V3L8210uF1233122NC/B240A44L81FB/2012D185+5V_ON+3V3+3V33,4,6,7,10,12,135BL-ON/OFF51212V_M1126BL-ADJUST6FB/2012+5VSNC/B240A12V_M77L83FB/20125V_MR259D1878812214.7K211212V_M99L84R-RE
6、SC1005L-HXFB64NC/B240A12V_M10,12,1310+5VS1012CB12CB11NC/0603/181+5V_ONR26321111FB/2012110uF210uF2008.6.412SW12SW1NC/02+5V_ON+5V_ON131314R-RESC1005L-HX+5V_TUNERUP31-M102UP31HIGH:POWEROFFR264+5V_TUNERR-RESC1005L-HX+5V_TUNER103UP31LOW:POWERONR258Q2911210KUP31
7、23904SWSW62R-RESC1005L-HXR260DDRV10KR-RESC1005L-HXDDRV1DDRV4,5AV12AV12AV124DV10PowerforMT8222only_Alwayson_DV10DV103,45V_M6MUSTUSEAP1122LDO#1U4therm_5_5_5LDO#25V_M5V_M3,6,8,11,12,13TJ3965RS-3.3-5LU8AP1122+3V3AV12UP31UP313VENVINGNDVOUTADJ32+5V_ON123452008.6
8、.4INOUT4GNDTAB1GND3,4,5,6,7,8,9,10,11,12,13+3V3ADJ/GND_0_0_01CB860+CE859R2621210K0.1uF100uF/16vBL-ON/OFF1BL-ON/OFF13+3V3R-RESC1005L-HX22R-SOT4N-230-700-HXBL-ADJUST1121P1SHIELDBL-ADJUST131R857+CE15M-RSAG7_070_
