ov7670-规格书

Version1.1,October6,2005ProprietarytoOmniVisionTechnologies1AdvancedInformationPreliminaryDatasheetOV7670/OV7171CMOSVGA(640x480)CAMERACHIPTMwithOmniPixel®TechnologyOmniision®GeneralDescriptionTheOV7670/OV7171CAMERACHIPTMisalowvoltageCMOSimagesensorthatprovidesthefullfunctionalityofasingle-chipVGAcameraandimageprocessorinasmallfootprintpackage.TheOV7670/OV7171providesfull-frame,sub-sampledorwindowed8-bitimagesinawiderangeofformats,controlledthroughtheSerialCameraControlBus(SCCB)interface.Thisproducthasanimagearraycapableofoperatingatupto30framespersecond(fps)inVGAwithcompleteusercontroloverimagequality,formattingandoutputdatatransfer.Allrequiredimageprocessingfunctions,includingexposurecontrol,gamma,whitebalance,colorsaturation,huecontrolandmore,arealsoprogrammablethroughtheSCCBinterface.Inaddition,OmniVisionCAMERACHIPsuseproprietarysensortechnologytoimproveimagequalitybyreducingoreliminatingcommonlighting/electricalsourcesofimagecontamination,suchasfixedpatternnoise(FPN),smearing,blooming,etc.,toproduceaclean,fullystablecolorimage.Features•Highsensitivityforlow-lightoperation•Lowoperatingvoltageforembeddedportableapps•StandardSCCBinterfacecompatiblewithI2Cinterface•OutputsupportforRawRGB,RGB(GRB4:2:2,RGB565/555/444),YUV(4:2:2)andYCbCr(4:2:2)formats•Supportsimagesizes:VGA,CIF,andanysizescalingdownfromCIFto40x30•VarioPixel®methodforsub-sampling•Automaticimagecontrolfunctionsincluding:AutomaticExposureControl(AEC),AutomaticGainControl(AGC),AutomaticWhiteBalance(AWB),AutomaticBandFilter(ABF),andAutomaticBlack-LevelCalibration(ABLC)•Imagequalitycontrolsincludingcolorsaturation,hue,gamma,sharpness(edgeenhancement),andanti-blooming•ISPincludesnoisereductionanddefectcorrection•SupportsLEDandflashstrobemode•Supportsscaling•Lensshadingcorrection•Flicker(50/60Hz)autodetection•Saturationlevelautoadjust(UVadjust)•Edgeenhancementlevelautoadjust•De-noiselevelautoadjustOrderingInformationPbNote:TheOV7670/OV7171usesalead-freepackage.ProductPackageOV07670-VL2A(Color,lead-free)24pinCSP2OV07171-VL2A(B&W,lead-free)24pinCSP2Applications•CellularandPicturePhones•Toys•PCMultimedia•DigitalStillCamerasKeySpecificationsFigure1OV7670/OV7171PinDiagram(TopView)ActiveArraySize640x480PowerSupplyDigitalCore1.8VDC+10%Analog2.45Vto3.0VI/O1.7Vto3.0Vaa.I/Opowershouldbe2.45VorhigherwhenusingtheinternalregulatorforCore(1.8V);otherwise,itisnecessarytoprovideanexternal1.8VfortheCorepowersupply.PowerRequirementsActive60mWtypical(15fpsVGAYUVformat)Standby20µATemperatureRangeOperation-30°Cto70°CStableImage0°Cto50°COutputFormats(8-bit)•YUV/YCbCr4:2:2•RGB565/555/444•GRB4:2:2•RawRGBDataLensSize1/6ChiefRayAngle25°MaximumImageTransferRate30fpsforVGASensitivity1.3V/(Lux•sec)S/NRatio46dBDynamicRange52dBScanModeProgressiveElectronicsExposureUpto510:1(forselectedfps)PixelSize3.6µmx3.6µmDarkCurrent12mV/sat60°CWellCapacity17KeImageArea2.36mmx1.76mmPackageDimensions3785µmx4235µmOV7670/OV7171AGNDSIO_CA1A2A4A3D1D0D3D2A5B1B2B4B3B5C1D1D2AVDDSIO_DPWDNVSYNCVREF2HREFDVDDC2VREF1D4D5E1E2E4E3E5F1F2F4F3F5DOGNDDOVDDPCLKSTROBERESET#D6XCLKD72ProprietarytoOmniVisionTechnologiesVersion1.1,October6,2005OV7670/OV7171CMOSVGA(OmniPixel®)CAMERACHIP™OmniisionFunctionalDescriptionFigure2showsthefunctionalblockdiagramoftheOV7670/OV7171imagesensor.TheOV7670/OV7171includes:•ImageSensorArray(totalarrayof656x488pixels,withactivepixels640x480inYUVmode)•AnalogSignalProcessor•A/DConverters•TestPatternGenerator•DigitalSignalProcessor(DSP)•ImageScaler•TimingGenerator•DigitalVideoPort•SCCBInterface•LEDandStrobeFlashControlOutputFigure2FunctionalBlockDiagramA/DGD[7:0]BR50/60HzAutoDetectTestPatternGeneratorVideoPortImageScalerDSPBufferBuffer(Lensshadingcorrection,de-noise,white/blackpixelcorrection,autowhitebalance,etc.)FIFOAnalogProcessingImageArray(656x488)ColumnSenseAmpExposure/GainDetectExposure/GainControlSCCBInterfaceRegistersVideoTimingGeneratorClockSIO_CSIO_DSTROBEPWDNRESET#VSYNCPCLKHREFXCLKRowSelectFunctionalDescriptionVersion1.1,October6,2005ProprietarytoOmniVisionTechnologies3OmniisionImageSensorArrayTheOV7670/OV7171sensorhasanimagearrayof656x488pixelsforatotalof320,128pixels,ofwhich640x480pixelsareactive(307,200pixels).Figure3showsacross-sectionoftheimagesensorarray.Figure3ImageSensorArrayTimingGeneratorIngeneral,thetiminggeneratorcontrolsthefollowingfunctions:•Arraycontrolandframegeneration•Internaltimingsignalgenerationanddistribution•Frameratetiming•AutomaticExposureControl(AEC)•Externaltimingoutputs(VSYNC,HREF/HSYNC,andPCLK)AnalogSignalProcessorThisblockperformsallanalogimagefunctionsincluding:•AutomaticGainControl(AGC)•AutomaticWhiteBalance(AWB)A/DConvertersAftertheAnalogProcessingblock,thebayerpatternRawsignalisfedtoa10-bitanalog-to-digital(A/D)convertersharedbyGandBRchannels.ThisA/Dconverteroperatesatspeedsupto12MHzandisfullysynchronoustothepixelrate(actualconversionrateisrelatedtotheframerate).InadditiontotheA/Dconversion,thisblockalsohasthefollowingfunctions:•DigitalBlack-LevelCalibration(BLC)•OptionalU/Vchanneldelay•AdditionalA/DrangecontrolsIngeneral,thecombinationoftheA