机器人摄像头030ov7910 18p.doc

FeaturesPreliminaryOV7910/OV7410/OV7411OV7910P SINGLE-CHIP CMOS COLOR PAL CAMERAOV7410P/OV7411P SINGLE-CHIP CMOS B&W PAL CAMERAnSingle-chip 1/3 inch format video camera High-sensitivity version (OV7411P)nComposite video: PAL or S-VideonComponent video: RGB or YUVnSensitivity boost (+18 dB) /AGC on-offnAutomatic exposure/gain/white balancenExternal frame sync capabilityGeneral DescriptionThe OV7910P (color) and OV7410P/OV7411P (black and white) Sin-gle-chip CMOS camera devices are designed to provide a high levelof functionality in a single small-footprint package. Both devices sup-port composite video and S-Video. The OV7910P imager also pro-vides RGB and YCrCb video signals, and each device directlyinterfaces with a VCR TV monitor or other 75 ohm terminated input.A minimum of external components are required to complete a fullyfunctional camera subsystem. The OV7910P/OV7410P/OV7411Pvideo cameras require only a single 5-volt DC supply and have beendesigned for very low power operation. These products are ideal forall applications requiring a small footprint, low voltage, low power andlow cost color or black and white video camera.nAperture correctionnI2C programmable: color sat., brightness, contrast, white balance, exposure time,gainnGamma correction (0.45)-On/OffnLow power consumptionn+5 volt-only power suPlynVideo ConferencingnVideo PhonesnVideo e-mailnPC MultimedianToysnSecuritynSurveillance Array SizePAL:628 x 582 pixelsImage AreaPAL:5.78 x 4.19 mmAuto ElectronicAVDD 7RGSW 8CEXP 9HSAT10*Rsvd1111*SMTawb12*424140393837DEGNDDEVDDHSHPAMOD1AMOD0PWDNExposureMin. Illumination(3000K)1/60 - 1/15000 sec.OV7910P: < 3 lux f1.2OV7410P: < 0.5 lux f1.2OV7411P: < 0.2 lux f1.2EVDD13*OV7910P/OV7410P/36FSIEGND14*BUCO15GYYO16RVCVO17OVDD183534333231PALSWFODD/I2CENFSO/VSFRVSHYNC/MIRVADPXOS/N RatioFixed PatternNoise (FPN)Dark CurrentDynamic RangePower Supply> 48 dB< 0.03% VP-P< 0.2 nA/cm2> 72 dB5VDC, ±5%* NOTE: These pins are “no connect” in OV7410P/OV7411P sensor.OV7910P/OV7410P/OV7411P PIN ASSIGNMENTPowerRequirementsPackage Type200 mW48-pin LCCOmniVision Technologies, Inc. 930 Thompson Place Sunnyvale, CA 94086 U.S.A.Tel: (408) 733-3030 Fax: (408) 733-3061e-mail: infoWebsite: Version 1.4, December 7, 1999 A G N D R s v d 5 B P A V E V c B R T S V D D S G N D V R E F 4 V R E F 3 V R E F 1 S D A S C L G 2 X H IG A IN B K L T X C L K 1 X C L K 2 P A L D G N D G A M M A A G C E N D V D D A W B E N A W B T M V R E F 2 6 5 4 3 2 1 4 8 4 7 4 6 4 5 4 4 4 3 1 9 2 0 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 * 3 0 *OMNIVISION TECHNOLOGIES, Inc.OV7910P/OV7410P/OV7411PTable 1. Pin DescriptionPreliminarySINGLE IC CMOS COLOR & B/W PAL ANALOG CAMERAS(Pins designated with “*” are “no connect” in OV7410P/OV7411P sensor.)Pin No.NamePin TypeFunction/Description201020304050607080910*11*12*13*14*15SGNDSVDDVcBRTBPAVERsvd5AGNDAVDDRGSWCEXPHSATRsvd11SMTawbEVDDEGNDBUCOVinVin1.2VFunction(Default = 0)VrefVinVinFunction(Default = 0)Function(Default = 0)Function(Default = 0)(N/C on OV7410P/OV7411P)N/CFunction(Default = 0)(N/C on OV7410P/OV7411P)Vin(N/C on OV7410P/OV7411P)Vin(N/C on OV7410P/OV7411P)OutputAnalog groundAnalog power (+5VDC)Image brightness adjustment. Default set by internal resistor (50K). Default may be changedby applying external bias to this pin.Internal 3-point average selection“0” - Use internal 3-point averaging“1” - Bypass internal 3-point averagingInternal referenceAnalog groundAnalog power (+5VDC)“Raw” data pixel selection“0” - select non- “raw” pixel data“1” - select “raw” pixel dataCentral exposure selection“0” - select normal mode“1” - select central exposure modeColor Saturation selection“0” - select normal color saturation“1” - select increase color saturation by 25%Note: This function is not available on OV7410P/OV7411P Image Sensor. This pin is “no con-nect”.Pin reservedAutomatic White Balance (AWB) Smart mode selection“0” - Disable smart mode“1” - Enable smart mode. Count pixels which contain a luminance signal between 10-80% ofmax. value.Note: This function is not available on OV7410P/OV7411P Image Sensor. This pin is “no con-nect”.Analog power (+5VDC)Note: This function is not available on OV7410P/OV7411P Image Sensor. This pin is “no con-nect”.Analog groundNote: This function is not available on OV7410P/OV7411P Image Sensor. This pin is “no con-nect”.Video Output: Output format determined by pins 38 and 39 (AMOD1, AMOD0)AMOD1AMOD0Output ComponentFormat00S-Video CO channelComposite01Blue componentRGB10Cb componentYUV or B/W11Blue componentRGBNote: Modes (AMOD1, AMOD0) = 00, 01, 11 are not available for OV7410P Image Sensor Version 1.4December 7, 1999OMNIVISION TECHNOLOGIES, Inc.OV7910P/OV7410P/OV7411PTable 1. Pin DescriptionPreliminarySINGLE IC CMOS COLOR & B/W PAL ANALOG CAMERAS(Pins designated with “*” are “no connect” in OV7410P/OV7411P sensor.)Pin No.NamePin TypeFunction/Description1617181920212223242526272829*GYYORVCVOOVDDG2XHGAINBKLTXCLK1XCLK2PALDVDDDGNDGAMMAAGCENAWBENOutputOutputVinFunction(Default = 0)Function(Default = 0)Function(Default = 0)CLKCLKFunction(Default = 1)VinVinFunction(Default = 1)Function(Default = 1)Function(Default = 1)(N/C on OV7410P/OV7411P)Video Output: Output format determined by pins 38 and 39 (AMOD1, AMOD0)AMOD1AMOD0Output ComponentFormat00S-Video YO channelComposite01Green componentRGB10Y componentYUV or B/W11Green componentRGBNote: Modes (AMOD1, AMOD0) = 00, 01, 11 are not available for OV7410P Image SensorVideo Output: Output format determined by pins 38 and 39 (AMOD1, AMOD0)AMOD1AMOD0Output ComponentFormat00CVBS signalComposite01Red componentRGB10Cr componentYUV or B/W11Red componentRGBNote: Modes (AMOD1, AMOD0) = 00, 01, 11 are not available for OV7410P Image SensorAnalog power for video output (+5VDC)Automatic Gain Control (AGC) gain selection. Affects range selected by HGAIN (p20). SeeHGAIN below.“0” - select normal AGC gain (1X)“1” - select enhanced AGC gain (2X)Automatic Gain Control (AGC) gain range selection“0” - select normal AGC range (1X <-> 4X)“1” - select expanded AGC range (1X -> 8X)HGAING2XAGC Range001X <-> 4X012X <-> 8X101X <-> 8X112X <-> 16XBacklight selection“0” - Disable backlight compensation“1” - Enable backlight compensationCrystal clock input. Frequency is 4 x Fsc to meet PAL subcarrier standardsCrystal clock output (4 x Fsc for PAL = 17.73265 MHz)Digital powerDigital groundGAMMA selection“0” - Disable GAMMA correction“1” - Enable GAMMA correctionAutomatic Gain Control (AGC) selection“0” - Disable AGC“1” - Enable AGCAutomatic White Balance selection“0” - Disable AWB“1” - Enable AWBNote: This function is not available on OV7410P/OV7411P Image Sensor. This pin is “no con-nect”.December 7, 1999 Version 1.43OMNIVISION TECHNOLOGIES, Inc.OV7910P/OV7410P/OV7411PTable 1. Pin DescriptionPreliminarySINGLE IC CMOS COLOR & B/W PAL ANALOG CAMERAS(Pins designated with “*” are “no connect” in OV7410P/OV7411P sensor.)Pin No.NamePin TypeFunction/Description30*31AWBTMVAXPXOFunction(Default = 0)(N/C on OV7410P/OV7411P)OutputAutomatic White Balance speed selection“0” - Select normal AWB“1” - Select “fast” AWBNote: This function is not available on OV7410P/OV7411P Image Sensor. This pin is “no con-nect”.Valid pixel detect output. CLK is asserted on this pin during active image period.32VHSYNC/MIROutput/Function(Default = 0)Vertical/horizontal sync output. Adding a pullup resistor on this pin enables mirror image33FSO/VSFROutput/Function(Default = 0)Vertical field/frame sync output, default to field sync. Adding a pullup resistor on this pin enablesframe sync.34FODD/I2CENOutput/Function(Default = 0)Even/Odd field flag. Adding a pullup resistor on this pin enables I2C control.43536373839404142434445464748PALSWFSIPWDNAMOD0AMOD1HSHPDEVDDDEGNZDSCLSDAVREF1VREF2VREF3VREF4OutputInputFunctionFunctionFunctionFunctionVinVinInput/OutputInput/OutputVrefVrefVrefVrefPAL switch clock outputField sync inputPower Down mode selection“0” - Disable power down mode“1” - Enable power down modeAMOD0 (w/AMOD1) selects output mode.Note: This function is not available on OV7410P/OV7411P Image Sensor. This pin is “no con-nect”.AMOD1 (w/AMOD0) selects output mode.Note: This function is not available on OV7410P/OV7411P Image Sensor. This pin is “no con-nect”.Sharpness level selection“0” - select normal sharpness“1” - select x2 sharpnessAnalog powerAnalog groundI2C controlI2C data/addressInternal reference. Must be decoupled with 0.1 µF capacitor to analog ground.Internal reference. Must be decoupled with 0.1 µF capacitor to analog ground.Internal reference. Must be decoupled with 0.1 µF capacitor to analog ground.Internal reference. Must be decoupled with 0.1 µF capacitor to analog ground. Version 1.4December 7, 1999OMNIVISION TECHNOLOGIES, Inc.OV7910P/OV7410P/OV7411P1.Functional DescriptionPreliminarySINGLE IC CMOS COLOR & B/W PAL ANALOG CAMERAS(Note: All references to color functions apply only to OV7910P image sensor)1.1Video StandardsTwo TV standards are implemented and available asoutput in the OV7910P/OV7410P/OV7411P imagingdevices: PAL (B). Table 2 below shows how to config-ure the standard of choice. Please noteTable 2. Standard Configurationthat the accuracy and stability of the crystal clock fre-quency is important to avoid unwanted color shift in TV/video systems.StandardPALPAL(pin 24)1Clock17.734475 MHzCommentsclock in = 4 x Fsc1.2Video FormatsTheOV7910P/OV7410P/OV7411Pimagesensorssupport a variety of formats including Composite(CVBS), S-Video (YO/CO), RGB components, YUVcomponents, and B/W. Composite and S-Video signalsare generated from the internal TV encoder and theRGB/YUV/BW outputs are generated from the colormatrix prior to entering the encoder.configuration for the OV7910P/OV7410P/OV7411Pimage sensors. Pins AMOD0/AMOD1 (pins 38 and 39)select composite and S-Video formats. In this configu-ration, RVCVO (pin 17) outputs CVBS, GYYO (pin 16)outputs1.2.2RGBSetting AMOD0 = 1 (w/AMOD1 = x) selects the RGBformat. In this configuration, RVCVO outputs the1.2.3YUVSetting AMOD0=0 and AMOD1=1 configures theOV7910P/OV7410P/OV7411P sensors to operate inYUV or B/W mode. In this configuration, GYYO outputsthe Y component, RVCVO provides the Cr component,The image sensor utilizes the RG/BG Bayer patternsending raw pixel data through the color matrix, creat-ing RGB or YUV component signals. At the same time,YUV signals are also processed to generate both com-posite and S-Video signals. (Note: Color format config-uration is valid only for the OV7910P image sensor)1.2.1Composite and S-VideoThe Composite/S-Video format is the power-up defaultthe YO component of the S-Video signal, and BUCO(pin 15) outputs the CO component. Table 3 belowsummarizes the formats available and the settingsrequired on the appropriate pins.Red component, GYYO outputs the Green component,and BUCO provides the Blue component.and BUCO outputs the Cb component. On theOV7410P image sensor, only the GYYO (Y compo-nent) output is valid.December 7, 1999 Version 1.45OMNIVISION TECHNOLOGIES, Inc.OV7910P/OV7410P/OV7411PTable 3. Video Format SelectionPreliminarySINGLE IC CMOS COLOR & B/W PAL ANALOG CAMERASFormat TypeComposite + S-VideoRGB ComponentsYUV ComponentsBlack and WhiteRVCVO Output(pin 17)CVBSRedCrGYYO Output(pin 16)YOGreenYYBUCO Output(pin 15)COBlueCbPin SettingsAMOD0 = 0, AMOD1 = 0AMOD0 = 1, AMOD1 = xAMOD0 = 0, AMOD1 = 1AMOD0 = 0, AMOD1 = 1(Pins 15 & 17 are undefined on the OV7410P sen-sor)1.3Configuring the OV7910P/OV7410P/OV7411PImage Sensors for OperationThe OV7910P/OV7410P/OV7411P sensors have beendesigned for easy-of-use in many stand-alone applica-tions. Most of the on-chip functions are configurable byconnecting appropriate pins high (logic “1”) or low(logic “0”) through a 10k Ohm resistor. The image sen-sor reads the input the pins at power up, which enablesuser-defined default configurations.The OV7910P/OV7410P/OV7411P imaging devicesalso contain an I2C interface for programmatic accesssensors will enable the I2C port for access.1.4White BalanceThe function of white balance in the OV7910P imagesensor is to adjust and calibrate the image devicessensitivity on the primary (RGB) colors to match thecolor cast of the light source. The Auto White Balance(AWB) can be enabled or disabled either through anexternal pin (AWBEN, pin 29) or through the I2C port. Ifable only through the