OV7660

Version1.91,January24,2005ProprietarytoOmniVisionTechnologies1AdvancedInformationPreliminaryDatasheetOV7660/OV7161CMOSVGA(640x480)CAMERACHIPTMwithOmniPixelTMTechnologyOmniTMisionGeneralDescriptionTheOV7660/OV7161CAMERACHIPTMisalowvoltageCMOSimagesensorthatprovidesthefullfunctionalityofasingle-chipVGAcameraandimageprocessorinasmallfootprintpackage.TheOV7660/OV7161providesfull-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•Lowoperatingvoltageforembeddedportableapplications•StandardSCCBinterface•VGA,QVGA,QQVGA,CIF,QCIF,QQCIFandwindowedoutputswithRawRGB,RGB(GRB4:2:2),YUV(4:2:2)andYCbCr(4:2:2)formats•VarioPixelTMmethodforsub-samplingformats•Automaticimagecontrolfunctionsincluding:AutomaticExposureControl(AEC),AutomaticGainControl(AGC),AutomaticWhiteBalance(AWB),AutomaticBrightnessControl(ABC),andAutomaticBlack-LevelCalibration(ABLC)•Imagequalitycontrolsincludingcolorsaturation,hue,gamma,sharpness(edgeenhancement),andanti-bloomingOrderingInformationProductPackageOV07660-KL6A(Color)CSP-22OV07161-KL6A(B&Wwithmicrolens)CSP-22Applications•CellularandPicturePhones•Toys•PCMultimedia•DigitalStillCamerasKeySpecificationsFigure1OV7660/OV7161PinDiagramArrayElement(VGA)664x492PowerSupplyDigitalCore1.8VDCAnalog2.45Vto2.8VI/O2.5Vto(VDD-A+0.3V)PowerRequirementsActive40mWwithoutloadingStandby10µATemperatureRangeOperation-20°Cto80°CStableImage-10°Cto60°COutputFormats(8-bit)•YUV/YCbCr4:2:2•RGB4:2:2•RawRGBDataLensSize1/5LensChiefRayAngle~20°MaxImageTransferRateVGA,CIF,QCIF,QQCIF30fpsQVGA,QQVGA60fpsSensitivity1.0V/Lux-secS/NRatio48dB(AGCoff,Gamma=1)DynamicRange72dBScanModeProgressiveElectronicsExposureUpto510:1(forselectedfps)GammaCorrection0.45/0.55/1.00PixelSize4.2µmx4.2µmDarkCurrent30mV/sat60°CWellCapacity35KeFixedPatternNoise0.03%ofVPEAK-TO-PEAKImageArea2.76mmx2.05mmPackageDimensions4155µmx3975µmOV7660/OV7161SIO_DSIO_CA1A2A4A3D1D0D3D2D4D5A5B1B2B4B3B5C1D1D2D4D3D5E1E2E4E3E5DOGNDAVDDAGNDDOVDDVREFHREFPWDNPCLKVSYNCXCLK1D6RESETD7C2DVDD2ProprietarytoOmniVisionTechnologiesVersion1.91,January24,2005OV7660/OV7161CMOSVGA(OmniPixel™)CAMERACHIP™OmniisionFunctionalDescriptionFigure2showsthefunctionalblockdiagramoftheOV7660/OV7161imagesensor.TheOV7660/OV7161includes:•ImageSensorArray•AnalogSignalProcessor•A/DConverters•DigitalSignalProcessor(DSP)•OutputFormatter•TimingGenerator•SCCBInterface•DigitalVideoPortFigure2FunctionalBlockDiagramA/DGD[7:0]BRFormatterDSPVideoPortAnalogProcessingImageArray(664x492)ColumnSenseAmpExposure/GainDetectExposure/GainControlWhiteBalanceDetectControlSCCBInterfaceRegistersVideoTimingGeneratorClockSIO_CSIO_DPWDNRESETVSYNCPCLKHREFXCLK1WhiteBalanceRowSelectFunctionalDescriptionVersion1.91,January24,2005ProprietarytoOmniVisionTechnologies3OmniisionImageSensorArrayTheOV7660/OV7161sensorhasanactiveimagearrayof640columnsx480rows(307,200pixels).Figure3showsacross-sectionoftheimagesensorarray.Figure3ImageSensorArrayTimingGeneratorIngeneral,thetiminggeneratorcontrolsthefollowingfunctions:•Arraycontrolandframegeneration(7differentformatoutputs)•Internaltimingsignalgenerationanddistribution•Frameratetiming•AutomaticExposureControl(AEC)•Externaltimingoutputs(VSYNC,HREF/HSYNC,andPCLK)AnalogSignalProcessorThisblockperformsallanalogimagefunctionsincluding:•AutomaticGainControl(AGC)•AutomaticWhiteBalance(AWB)A/DConvertersAftertheAnalogProcessingblock,thebayerpatternRawsignalisfedtoa10-bitanalog-to-digital(A/D)convertersharedbyGandBRchannels.ThisA/Dconverteroperatesatspeedsupto12MHzandarefullysynchronoustothepixelrate(actualconversionrateisrelatedtotheframerate).GlassMicrolensBlueGreenRedInadditiontotheA/Dconversion,thisblockalsohasthefollowingfunctions:•DigitalBlack-LevelCalibration(BLC)•OptionalU/Vchanneldelay•AdditionalA/DrangecontrolsIngeneral,thecombinationoftheA/DRangeMultiplierandA/DRangeControlsetstheA/Drangeandmaximumvaluetoallowtheusertoadjustthefinalimagebrightnessasafunctionoftheindividualapplication.DigitalSignalProcessor(DSP)ThisblockcontrolstheinterpolationfromRawdatatoRGBandsomeimagequalitycontrol.•Edgeenhancement(atwo-dimensionalhighpassfilter)•Colorspaceconverter(canchangeRawdatatoRGBorYUV/YCbCr)•RGBmatrixtoeliminatecolorcrosstalk•Hueandsaturationcontrol•Programmablegammacontrol•Transfer10-bitdatato8-bitOutputFormatterThisblockcontrolsalloutputanddataformattingrequiredpriortosendingtheimageout.DigitalVideoPortRegisterbitsCOM2[1:0]increaseIOL/IOHdrivec