摄像头与视频算法处理ov6620中文

1、)OV6620 CMOSCIF 彩色OV6120 CMOSCIF 黑白头头特101376像素（352x288）,1/4棱镜，CIF/QCIF格式数据格式：YCrCb4:2:2GRB4:2:2,RGBRawData(RGB原始数据8/16数据：CCIR601、CCIR656、ZV 端/5V 80)OV6620 CMOSCIF 彩色OV6120 CMOSCIF 黑白头头特101376像素（352x288）,1/4棱镜，CIF/QCIF格式数据格式：YCrCb4:2:2GRB4:2:2,RGBRawData(RGB原始数据8/16数据：CCIR601、CCIR656、ZV 端/5V 80 SCCB可

2、编程（400kb/s）概OV6620(彩色)和 OV6120(黑白色)CMOS 图像传感器是单/352x288 SCCB(SerialCameraControl式4-、8-16-bit 、PC。第 1 2009-6-356x(176xGammaPixel9.0 x8.2Image3.1x2.5S/Noff,Gamma=MaxFrame/= =(forselectedDark0.2Scan Dynamicer5VDC,+-5VDCor80mW 30uW48pin)管脚*说明：UV0-UV7 输出在 0V6120 中不可用。但是相应管脚上的其他功能依然有效管脚描第 2 2009-6-)管脚*说明：

3、UV0-UV7 输出在 0V6120 中不可用。但是相应管脚上的其他功能依然有效管脚描第 2 2009-6-功能/阵列电源（缺省复位，（缺省 SCCB（缺省控制 0.1uF模拟电源)第 3 2009-6-（缺省 0.1uF1uF（缺省SCCB 模拟电源FODDHREF 输出。在上电时，读作B8ABKEN)第 3 2009-6-（缺省 0.1uF1uF（缺省SCCB 模拟电源FODDHREF 输出。在上电时，读作B8ABKENMIRBit4Bit3QCIFCC656GAMMAIO数字电源数字接口输出缓冲电源CS0CS2SHARPCS1)第 4 2009-6-RGBG2XBit1CBAR)第 4

4、2009-6-RGBG2XBit1CBARCHSYNC 输出。在上电时，作为取样信号地电源ISCCBSCCB（缺省SCCB 使能多（8个）)1功能描（OV6120 不适用)1功能描（OV6120 不适用1.1 总1所示。OV6620/OV6120CMOS图像传感器方框图如下，OV6620传感器包356x292 8位模/数转换器，模拟视频复用器，数字数据格式器和 端口，SCCB接口和寄存器，数字控制包括时钟模块、曝 RG / GB 阵列。第 5 2009-6-)1.2 模拟信号产生电1.2.1 综356 x 292 Y=0.59G+0.31R+0.11B U = R-YV = B- )1.2 模

5、拟信号产生电1.2.1 综356 x 292 Y=0.59G+0.31R+0.11B U = R-YV = B- Y=0.59G+0.31R+0.11B Cr = 0.713 x (R- Y)Cb=0.564x(B-YCrCb/RGB（Raw Data）8 后发送到用户所选 16-,8-或者 4-Y/RGB240CrCb峰值/RGB（Rawdata）(说明：0255 保留用于同步标志处不是非常亮的情况下，可以调整自控制（AEC）白24dB的场红/第 6 2009-6-)1.2.3 窗口OV6620/OV6120 (像素)2x 2 356 )1.2.3 窗口OV6620/OV6120 (像素)2

6、x 2 356 x 292356 x 292OV6620/OV6120 改HREF 352 x 288。1.2.4 变端口PortOV6620/OV6120 图像传感器包含（ZV）变焦 ZV端口。ZV2.1变VSYNC ：垂直同步脉冲8.86MHz时。PCLK16bitY7:0 ：8UV7:0：8第 7 2009-6-)2 、所有的定时参数见13端流参数1.2.5 QCIF格减少一半。缺省的分辨率是 176 x 144 7-QCIF 数字输出格式（YUV，开始行）8-QCIF 数字输出格式（RGB 始行）输OV6620/0V6120 输出端提供了一系列输出格式/许多不同的应用需求。表 2-)2

7、 、所有的定时参数见13端流参数1.2.5 QCIF格减少一半。缺省的分辨率是 176 x 144 7-QCIF 数字输出格式（YUV，开始行）8-QCIF 数字输出格式（RGB 始行）输OV6620/0V6120 输出端提供了一系列输出格式/许多不同的应用需求。表 2-数字输出格式，如下，指明了可用的输出格式。这些格式用户SCCB 接口（3.1 SCCB 总线协议格式）编程选择。OV6620/0V6120 支持CCIR601 CCIR656 输出格式如下配置（参见表3-4:2:2 格式16-bit4:2:2 （60/50HzCCIR601时序标准。参见316bit8-bit （Cb Y Cr

8、YUV4-4:2:28-bit4-bitnibble（输出数据出现在 Y4-Y7。时钟速率是黑/白模式正常输出速度24704x288（在此模式下，OV6620/0V6120 的像素时钟加倍输出顺序是见 OV6620/OV6120VSYNC，HREF ，PCLK ，FODD ，CHSYNCOV6620/OV6120图像传感器也可以编程提供16-bit/8-bit/4-bit格式的RGB原始数据的OV6620（见4（RGB）Y 通道输出序列是 GRG UV BGB 8RGB在RGB 原始数据CCIR656 模式OV6620/OV6120 能够确认SAV(Start of 开始)EAV(End of

9、 结束)HREF 束。因此，SAV EAV 改变有效像素窗口。8 位的RGB 原始数据在没有SAV 和EAV 的信OV6620/OV6120YUV输出格式上提供很大的灵活性。这些设备可以编程为标YUV 4:2:2U V序列可以交换。当交换时，UV通道的 16-bit 配置的输出格式变成:-VUVU第 8 2009-6-)bit VYUOV6620/OV6120 8-bit Y)bit VYUOV6620/OV6120 8-bit YUYVY端口提供（pins34:41）UV端口是三态模式。数据16-bit 模式时一样的。OV6620/OV6120 Y/UV RGB （MSBLSB）可以翻转。Y

10、7-Y0Y7MSB，Y0LSB 1RGBCCI6568bit 。SAV和EAVHREF （没有 VSYNC 和 CHSYNC）可能被使用2Y/UV8-bit 模式下有效。YYUYV3YUV格式，U/VUV通道输出序列交换。16-bit V U V U；8-VYU4RGB格式，U/VB RRGB第 9 2009-6-)第 10 2009-6-)第 10 2009-6-)TclkOV662017.73MHz，)TclkOV662017.73MHz，Tclk112ns 16-bit输出Tclk56ns8 - bit输出。TsuHREF15ns;ThdHREF保持15ns。Figure3.PixelD

11、ataBus(YUV第 11 2009-6-)Tclk是像素时钟周)Tclk是像素时钟周期OV6620 17.73MHz 系统时钟，Tclk = 112ns 16-bit 的输出Tclk56ns8-bit的输出。TsuHREF15ns;ThdHREF保持15ns。Figure4.PixelDataBus(RGB第 12 2009-6-)Y通道输出 Y2Y3)Y通道输出 Y2Y3Y6Y7Y10UVU2V3U6V7U10176144RGBYG0R1G4R5G8UVB0G1B4G5B8每行输出一半的数据（176像素144YGYG0R1G4R5G8UVB0G1B4G5B8每行输出一半的数据（176像素

12、144QCIFYY2Y3Y6Y7Y10UVU2V3U6V7U10每行输出一半的数据（176像素144第 13 2009-6-)1.2.7模OV6620/OV6120传感器可编程运行在从模式下（COMI6=1，默认情况下是主模式。HSYNC VSYNC )1.2.7模OV6620/OV6120传感器可编程运行在从模式下（COMI6=1，默认情况下是主模式。HSYNC VSYNC 输出信号。 （1）CLKXCLK1引脚水平同步信号，Hsync CHSYNC tivetiveassertion当工作在从模式下，OV6620/OV6120 CHSYNC（引脚 42）和 VSYNC（引脚 16）为三态输

13、出引脚，可被用来作为输入引脚。为了同步多个设备，OV6620/OV6120图像传感器使用外部系统时钟 CLK，来同步外部水平同步信号 HSYNC，然后用来同步外部垂直帧同步号 Vsync。见图 5-从模式外部同步时序1、Ths6*Tclk;ThsTvsTprTinTin时间设置方法是Ths(Figure6.Frameure第 16 2009-6-)v第 17 2009-6-)v第 17 2009-6-)2.电学特第 18)2.电学特第 18 2009-6-)（t8)（t8 第 19 2009-6-)（t8（2）在 VSYNC 下)（t8（2）在 VSYNC 下降沿之后，ov6620 将会输出黑

14、色参考水平，行号是 Tvs，它是在 VSYNC下降沿之后的第一个 HREF 上升沿和第一个有效数据 CHSYNC 上升沿之间。接下来就是有效数据，然后又是黑色参考水平，行号是 Tve，它是在 VSYNC 上升沿后的第一个 CHSYNCCHSYNC 上升沿之间。黑色参考输出行号由垂直窗口(vertical window )设置。（3在默认设置时，Tvs14*TlineVS7.0改变而改变。VS7:0 1（4Tve= 4 *TlineTve= 3 *TlineVE7.0 1第 20 2009-6-)第 21 2009-6-)第 21 2009-6-)3.SCCB总OV6620/OV6120 图像传

15、感器的许多功能和可配置寄存器可通过 SCCB 接口实现。 SCCB 端口可以通过SBB 管脚（pin 12）10K ohm 的电阻到VDD 来使)3.SCCB总OV6620/OV6120 图像传感器的许多功能和可配置寄存器可通过 SCCB 接口实现。 SCCB 端口可以通过SBB 管脚（pin 12）10K ohm 的电阻到VDD 来使能SCCB 启用（SBB1）OV6620/OV6120400kbps的串行传输速率，使7位地址/数据传输协议。因此，OV6620/OV6120传感器在写周期前读子地址。期内获得连续的地址。多字节循环覆盖原来的子地址;3.1SCCB总线格每一个字节，MSB 总是先

16、传输。读/写控制位是第一个字节 LSB 位。协议要求在 SIO-1高电平期间 SIO-0 保持不变。只有在在 SIO-1 为低电平时，每个 bit 才允许改变。 因此，OV6620/OV6120 传感器在写周期前读子地址。OV6620/OV6120 可以编程一个的8 位34）CS2:0OV6620/OV61208 配置。由 MULT（管脚 47）高电平时，该传地址。MULTOV6620/OV6120 在写周期，SCCB 总线上的第二个字节是子地址（subaddress）的子地址。读未实现的子地址返回unknown。3.2 寄存 关于寄存器，还是不要翻译了，以免小错引大错的为主第 22 2009

17、-6-)第 23 2009-6-)第 23 2009-6-AdvancedTECHNOLOGIES, SINGLE IC CMOS COLOR AND B/W DIGITAL RegisterTheelowprovidesalistanddescriptionofableSCCBregisterscontained image sensor.heTable16.SCCB13MaySaturationSAT7:0saturationadjustment.“FFh”-highest,“00h”-Note:ThisAdvancedTECHNOLOGIES, SINGLE IC CMOS COLOR

18、AND B/W DIGITAL RegisterTheelowprovidesalistanddescriptionofableSCCBregisterscontained image sensor.heTable16.SCCB13MaySaturationSAT7:0saturationadjustment.“FFh”-highest,“00h”-Note:ThisfunctionisnotavailableontheOV6120Image-ContrastCTR7:0contrastadjustment.“FFh”-highest,“00h”-BrightnessBRT7:0brightn

19、essadjustment.“FFh”-highest,“00h”-SharpnessSHP7:4Thresholdofsharpness.Range:080mV,Step:5mV SHP3:0 Sharpness control. Range: 0 8x, Step: 0.5x-AWB-WhiteBalanceBackground:BlueChannel ABLU7:6 - rsvdABLU5-Sign“0”-decreasebackgroundbluecomponent “1” - increase background blue componentABLU4:0-Whitebalance

20、blueratioNote:ThisfunctionisnotavailableontheOV6120ImageAGCGainGC7:6-unimplementedbit,returnsXwhenread. GC5:0StorageforthecurrentAGCGainThisregisterisupdatedautomatically.IfAGCisenabled,the ernalcontrolstorestheoptimal gainvaluehis register. IF AGC is not enabled, a “00” is storedhisregister.BlueGai

21、nBLU7“0”decreasegain,“1”increasegain. BLU6:0 blue channel gain balance value.Note:ThisfuncionisnotavailableontheOV6120ImageRedGainRED7“0”decreasegain,“1”increasegain. RED6:0 red channel balance value.Note:ThisfuncionisnotavailableontheOV6120ImageAdvancedTECHNOLOGIES, SINGLE IC CMOS COLOR AND B/W DIG

22、ITAL 13MayRAutomatic Exure Control AEC7:0 - Set exuretimeerlaced: Tex = Tline x AEC7:0 Progressive:Tex =Tline xAEC7:0 x2AdvancedTECHNOLOGIES, SINGLE IC CMOS COLOR AND B/W DIGITAL 13MayRAutomatic Exure Control AEC7:0 - Set exuretimeerlaced: Tex = Tline x AEC7:0 Progressive:Tex =Tline xAEC7:0 x2RClock

23、RateCLKRC7:5 Sync output polarity selection “00”-HSYNC=Neg,CHSYNC=Neg,VSYNC=“01”-HSYNC=Neg,CHSYNC=Neg,VSYNC=Neg “10” - HSYNC=, CHSYNC=Neg, VSYNC= “11” - HSYNC=,CHSYNC=,VSYNC=CLKRC50ClockCLK=(CLK_main/(CLKRC5:0+1)x2)/CommonControlCOMA7 - SRST, “1” initiates soft reset. Initiate soft reset. All regist

24、ers are set to default val- uesandchipisresettoknowns eandresumesnormaloperation.Thisbitisautomatically cleared after reset.COMA6-MIRR,“1”selectsmirrorimage COMA5 - VSFR, “1” enables AGC,COMA4 - Digital output format, “1” selects 8-bit: Y U Y V Y U Y V COMA3 - Selectdataoutput:“1”-selectRGB,“0”-sele

25、ctYCrCb COMA2 - Auto White Balance “1” - Enable AWB, “0” - Disable AWB COMA1 - Color Bar Test Pattern: “1” - Enable color bar test pattern COMA0-Note:COMA3isnotprogrammableontheOV6120ImageCommonControlS COMS7:6-COMS5:4-Blackexpanding“00”-1.2V,“01”-1.26V,“10”-1.3V,“11”-COMS3:2-Sethighthreshold“00”-1.

26、9V,“01”-2.0V,“10”-2.1V,“11”-COMS1:0-Setlowthreshold“00”-1.3V,“01”-1.45V,“10”-1.5V,“11”-AWB-WhiteBalanceBackground:RedChannel ARED7:6 - rsvdARED5-Sign“0”-decreasebackgroundred“1”-increasebackgroundredABLU4:0-WhitebalanceredratioNote:ThisfunctionisnotavailableontheOV6120ImageCommonControlCOMR7-ogsigna

27、l2xgaincontrolbit.“1”-Additional2xgain,“0”-normal COMR6:0-AdvancedTECHNOLOGIES, SINGLE IC CMOS COLOR AND B/W DIGITAL 13MayCommonControlB COMB7-COMB6COMB5-AdvancedTECHNOLOGIES, SINGLE IC CMOS COLOR AND B/W DIGITAL 13MayCommonControlB COMB7-COMB6COMB5-Selectdataformat.“1”-Select8-bitformat,Y/CrCbandRG

28、Bismultiplexedto8-bit Y bus, UV bus is tri-s ed, “0” - Select 16-bit formatCOMB4-“1”-enabledigitaloutputinCCIR656COMB3 - CHSYNC output: “1” - Horizontal sync, “0” - comitesync COMB2 - “1” - Tris e Y and UV busses. “0” - enabothbusses COMB1 - “1” - Initiate single frame transferCOMB0-“1”-Enableautoad

29、justNote:COMB5isnotprogrammableontheOV6120ImageCommonControlC COMC7-COMC6COMC5-QCIFdigitaloutputformatselection.1-176x144;0-COMC4-Field/FrameverticalsyncoutputinVSYNCportselection:1-framesync,only ODD field vertical sync; 0 - field vertical sync, effect in erlaced modeCOMC3 - HREF polarity selection

30、: 0 - HREFitiveeffective,1-HREFnegaive. COMC2 - gamma selection: 1 - RGB Gamma on ; 0 - gamma is 1.COMC1COMC0Common Control D COMD7-COMD6-PCLKpolarityselection.“0”OV6620outputdataatPCLKfallingedgeanddatabus will be stable at PCLK rising edge; “1” rising edge output data and stable at PCLK falling ed

31、ge. When OV6620 work as CCIR656 format, COMB4=1, this bit is disable and should use PCLK rising edge latch data bus.COMD5:1COMD0-UVdigitaloutputsequenceexchangecontrol.1-UVUV.for16-bit,UYVY. for 8-bit; 0 - V U V U . for 16Bit and V Y U Y . for 8 Bit.Note:COMD0isnotprogrammableontheOV6120ImageFieldSl

32、otFSD7:2 - Field erval selection. Odd Even mode defined by FD1:0 000000-disabledigitaldataoutput,onlyoutputblackreferencelevel. 000001 - divide to 2 slots, HREF iive one in every 2 field/frame 000010 - divide to 4 slots, HREF iive one in every 4 field/frame 000100 - divide to 8 slots, HREF iive one

33、in every 8 field/frame 001000 - divide to 16 slots, HREF iive one in every16 field/frame 010000 - divide to 32 slots, HREF iiveoneinevery32field/frame 100000-divideto64slots,HREFiveoneineveryFSD1:0-fieldmodeselection.Eachframeconsistsoftwofields:Odd&Even,thesebits defines the assertion of HREF in re

34、lation to the two fields.-OFFmode;HREFisnotassertedinbothfields,oneexceptionisthesingleframe transfer opera ion (see the description for the register 13)- ODD mode; HREF is asserted in odd field only. 10-EVENmode;HREFisassertedinevenfield11-FRAMEmode;HREFisassertedinbothoddfieldandevenfield.FD7:2Hor

35、izontalHREFHS7:0 - selects the starting po of HREF window, each LSB represents two pixels for CIF resolution mode, onxelsforQCIFresolutionmode,thisvalueissetbasedonan ernal column counter, the default value corresponds to 352 horizontal window. size is 356. see window description below. HS7:0 progra

36、mmable range is 38- EB, and shouldlessn HE7:0. HS7:0 should be programmable to value largern or equal to 38. Value largern EC is invalid. See window description below.HorizontalHREFHE7:0 - selectsing po of HREF window, each LSB represents two pixels for full resolution and onxelsforQCIFresolution,th

37、isvalueissetbasedonan ernalcolumn counter, the default value corresponds to the last availablxel. The HE7:0 programmable range is 39 - EC. HE7:0 should be larger han HS7:0 and lessnor equal to EC. Value largern EC is invalid. See window description below.VerticalLineVS7:0 - selects the starting row

38、of vertical window, in full resolution mode, each LSB represents1scanlineinoneframe.seewindowdescriptionbelow.Min.is03,max.is93 and should lessnVE7:0.VerticalLineVE7:0-selectsing row of vertical window, in full resolution mode, each LSB represents1scanlineinoneframe,seewindowdescriptionbelow.Min.is0

39、4,max.is94 and should largernVS7:0.AdvancedTECHNOLOGIES, SINGLE IC CMOS COLOR AND B/W DIGITAL 13MayPixelPS7 0 - to provide a way to fine tune the output timing of thxel data relative totof HREF, it physically shifts thedata output time late in unit of pixel clock as shown figurebelow.Thisfunctionisd

40、ifferentfromAdvancedTECHNOLOGIES, SINGLE IC CMOS COLOR AND B/W DIGITAL 13MayPixelPS7 0 - to provide a way to fine tune the output timing of thxel data relative totof HREF, it physically shifts thedata output time late in unit of pixel clock as shown figurebelow.Thisfunctionisdifferentfromchangingthe

41、sizeofthewindowasisdefinedby HS7:0 & HE7:0 in register 17&18.n default number shifts thxelindelay(right)direction,thehighestnumberis “FF”.soum shift number is: Late: 256 pixels.RManufactureIDByte:MIDH7:0-readonly,alwaysreturns“7F”asmanufacturersIDRManufactureIDByte:MIDL7:0-readonly,alwaysreturns“A2”

42、asmanufacturersIDRRCommonControlCOME7-HREFpixelnumberselection.“1”-HREFinclude704PCLK,everydataoutput COME6COME5 - “1”rturecorrectionenable.Correctionstrengthwillbedecidedby register 07. “0” disablerturecorrection.COME4 - “1” Second stagerture correction enable. Correction strengndthreshold value wi

43、ll be decided by COMF7 COMF4.COME3 - AWB smart mode enable. 1 - Drop out pixel when comparxel red, blue and green component level to change register 01 and 02, which luminance level is higher presetting level and lowern presetting level, this two level is set by register 0F.0-calculateallpixelstoget

44、AWBresult.ValidonlywhenCOMB0=1andCOMA2=1 COME2 - AWB stop when field/frame image average luminance level is lowernapresettinglevelenable.1-enablestopAWBwhenimageluminancelevelislow.0-AWBis independentwithfield/frameluminancelevel.ValidonlywhenCOMB0=1andCOMA2=1. Average compare level is set by GAM7:5

45、.COME1 - AWB fast/slow mode selection. “1” - AWB is always fast mode,t is register 01 and02ischangedeveryfield/frame.“0”AWBisslowmode,01and02changeevery16/ 64 field/frame decided by COMK1. When AWB enable, COMA2=1, AWB is working as fast mode at1024field/frame,n as slow mCOME0-Digitaloutputdrivercap

46、abilityincreaseselection:“1”Doubledigitaloutputdriver current; “0” low output driver current s us.Note:COME3(AWBSmartMode),COME2(AWBStop),andCOME1(AWBFast/Slow)are not programmable on the OV6120 Image Sensor.YChannelOffsetYOFF7-Offsetadjustmentdirection0-AddY6:0;1-SubstrateYOFF6:0 -Y channel digital

47、 output offset adjustment. Range: +127mV -127mV. If COMG2=0,thisregisterwillbeupdatedby ernalautoA/DBLCcircuit,andwriteavalue tothisregisterwithSCCBhasnoeffect.IfCOMG2=1,Ychanneloffsetadjustmentwilluse the register stored value which can be changed by SCCB. If COMF1=0, this register hasadjustmenteff

48、ecttoA/Doutputdata.IfoutputRGBrawdata,thisregisterwilladjustR/G/B UChannelOffsetUOFF7: - Offset adjustment direction: 0 - Add U6:0; 1 -Substrate U6:0. UOFF6:0-Uchanneldigitaloutputoffsetadjustment.Range:+128mV-128mV.COMG2=0,thisregisterwillbeupdatedby ernalautoA/DBLCcircuit,andwriteavalue tothisregi

49、sterwithSCCBhasnoeffect.IfCOMG2=1,Uchanneloffsetadjustmentwilluse the register stored value which can be changed by SCCB. If COMF1=1, this register hasno effecttoA/Doutputdata.IfoutputRGBrawdata,thisregisterwilladjustR/G/BNote: ThisfunctionisnotavailableontheOV6120Image REFC7:6 - Select different cr

50、ystal circuiterlevel(11=minimum). REFC5:4-REFC3:0:ReferenceVoltagerangeselection.2.5V-3.5VandsAutomaicureControl:BrightPixelRatioAEW7:0 - Used as calculate bright pixel ratio. OV6620 AEC algori hm is count whole field/ frame bright pixel (its luminance level is highern a fixed level) and black pixel

51、 (its luminance level is lowernafixedlevel)number.Whenbright/blackpixelratioissameas theratiodefinedbyregister25and26,imagestable.Thisregisterisusedtodefinebright pixel ratio, default is 25%, each LSB represent step: 1.3% Change range is: 01 CA; Increase AEW7:0 will increase bright pixel ratio. For

52、same light condition, the image brightness will increase if AEW7:0 increase.Note:AEW7:0mustcombinewithregister26AEB7:0.Therelationmustbeas AEW7:0 + AEB7:0 CA.AdvancedTECHNOLOGIES, SINGLE IC CMOS COLOR AND B/W DIGITAL 13MayAdvancedTECHNOLOGIES, SINGLE IC CMOS COLOR AND B/W DIGITAL 13MayAutomaticureCo

53、ntrol:BlackPixelRationAEB7:0 - used as calculate black pixel ratio. OV6620 AEC algorithm is count whole field/ frame bright pixel (its luminance level is highern a fixed level) and black pixel (its luminance level is lowernafixedlevel)number.Whenbright/blackpixelratioissameas theratiodefinedbyregist

54、er25and26,imagestable.Thisregisterisusedtodefineblack pixel ratio, default is 75%, each LSB represent step: 1.3%; Change range is: 01 CA; Increase AEB7:0 will increase black pixel ratio. For same light condition, the image brightness will decrease if AEB7:0 increase.Note:AEB7:0mustbecombinedwithregi

55、ster25Therelationmustbeas follows: EW7:0+AEB7:0CommonControlCOMF7:6-rturecorrectionthreshold00-Differenceofneighborpixelluminanceisn8mV,correction01- 1610- 3211- 64COMF5:4-rturecorrecionstrength00and01-Strengthis50%ofdifferenceofneighborpixelluminance. 10 - 100%.11-COMF3-UVBLCswap.“1”swap;“0”noCOMF2

56、-DigitaldataMSB/LSBswap.“1”LSB-Bit7,MSB-Bit0;“0”normal. COMF1 - “1” A/D Black level calibration enable. “0” Disable A/D BLC.COMF0 - “1” Output4lineblacklevelbeforevaliddataoutput.HREFnumberwill increase 4 relatively. “0” no black level output.CommonControlG COMG7-COMG6COMG5 - Select CKOUT pin output

57、 V flag. 1 - CKOUT output V flag signal. CKOUT=1, meansrelatedUVchanneloutputVcomponent(orRedcomponent),CKOUT=0po edto U component (or Blue component). 0 - CKOUT output buffered XCLK2COMG4COMG3COMG2-“1”A/Doffsetadjustmentmanuallymodeenable:1-A/Ddatawillbeadd/substrate avaluedefinedbyregister21and22,

58、whichcontentiswrittenbySCCB.0-A/Ddataadded/substrateavaluedefinedbyregister21and22,whichisupdatedby ernal COMG1-Digitaloutputfullrangeselection.OV6620outputdatavaluerangeis10-F0,if COMG1 -1, range change to 01 - FE with signal overshoot and undershoot level.COMG0CommonControlCOMH7:-“1”selectsOne-Lin

59、eRGBrawdataoutputformat,“0”selectsnormaltwo-lineRGB raw data output, effective only in Progressive Scan mode.COMH6: - “1” enablack/White mode. When OV6620 working as BW camera, its vertical resolution will be highern color mode. At this mode, cant set OV6620 working at 8 bit outputmode.OV6620outputd

60、ataYUV/RGBfromYport.UVportwillbetri-s e.COMB5 and COMB4 will be set to “0”. “0” normal color mode.COMH5:COMH4:-FreezeAEC/AGCvalue,effectiveonlywhenCOMB0=1.“1”-register00and10 will not be updated and hold latest value. “0” - AEC/AGC normal working s us.COMH3: - Aisable.1-whenCOMB0=1andCOMA5=1, ernalc