机器人摄像头022ov511 31p

1、ov511+advanced camera to usb bridgeomnivision technologies, inc.may 13, 2000data sheet rev. 1.2omnivision technologies, inc. reserves the right to make changes without further notice to anyproduct herein to improve reliability, function or design. omnivision does not assume any liabilityarising out

2、of the application or use of any project, circuit described herein; neither does it convey any license under its patent nor the right of others.this document contains information of a proprietary nature. none of this information shall be divulged to persons other than omnivision technologies, inc. e

3、mployee authorized by the natureof their duties to receive such information, or individuals or organizations authorized by omnivision technologies, inc.content1features.42architecture.52.1general description .52.2functional description.62.2.1camera interface .62.2.2dram interface.72.2.3omnice.82.2.4

4、iso fifo .92.2.5udc interface .102.2.6system control.102.2.7usb device controller .112.2.8sccb (serial camera control bus).112.2.9pio .112.2.10custom id.133pin definition.143.1pin assignments .143.2pin descriptions.154electrical characteristics .175register table (vendor commands) .185.1camera inter

5、face .185.2dram interface.195.3iso fifo.195.4pio .205.5sccb .205.6system control .225.7omnice .236usb descriptors .246.1device.246.2configuration.246.3interface & endpoint .246.3.1alternate 0 .256.3.2alternate 1 .256.3.3alternate 2 .256.3.4alternate 3 .266.3.5alternate 4 .266.3.6alternate 5 .276

6、.3.7alternate 6 .276.3.8alternate 7 .277software package.298mechanical information .301illustrationsfigure 1.functional block diagram.5figure 2.camera interface yuv - 4:2:2 - 16-bit horizontal timing waveforms6figure 3.camera interface vertical interlace timing waveforms.6figure 4.camera interface v

7、ertical progressive timing waveforms.7figure 5.memory map .7figure 6.dram interface write cycle timing waveforms .7figure 7.dram interface read cycle timing waveform.8figure 8.dram interface refresh cycle timing waveforms.8figure 9.structure of omnice.9figure 10.sof/eof formats.9figure 11.clock sche

8、me of ov511+.10figure 12.usb communication flow.11figure 13.pio read cycle timing waveforms .12figure 14.pio write cycle timing waveforms .12figure 15.100-pin pqfp package.142tablestable 1.capability of camera interface .6table 2.maximum pixel count of one 256kx16 dram .6table 3.parameters of dram i

9、nterface timing.8table 4.parameters of pio timing.13table 5.pin descriptions.15table 6.dc electrical characteristics.17table 7.absolute maximum ratings .17table 8.recommended operating conditions .17table 9.usb dc electrical characteristics .17table 10.usb full speed output driver electrical charact

10、eristics .17table 11.camera interface register list .18table 12.dram interface register list .19table 13.iso fifo register list .19table 14.pio register list .20table 15.sccb register list.20table 16.system control register list.22table 17.omnice register list .23table 18.device descriptor list .24t

11、able 19.configuration descriptor list .24table 20.interface descriptor list of alternate 0 .25table 21.endpoint descriptor list of alternate 0, packet size 0.25table 22.interface descriptor list of alternate 1 .25table 23.endpoint descriptor list of alternate 1, packet size 33.25table 24.interface d

12、escriptor list of alternate 2 .25table 25.endpoint descriptor list of alternate 2, packet size 129.26table 26.interface descriptor list of alternate 3 .26table 27.endpoint descriptor list of alternate 3, packet size 257.26table 28.interface descriptor list of alternate 4 .26table 29.endpoint descrip

13、tor list of alternate 4, packet size 385.26table 30.interface descriptor list of alternate 5 .27table 31.endpoint descriptor list of alternate 5, packet size 513.27table 32.interface descriptor list of alternate 6 .27table 33.endpoint descriptor list of alternate 6, packet size 769.27table 34.interf

14、ace descriptor list of alternate 7 .27table 35.endpoint descriptor list of alternate 7, packet size 961.2831 features§low cost, integrated solution for usb pc camera applications§built-in usb transceiver with selectable external usb transceiver interface1§usb compliance current consum

15、ption in unconfigured, configured, suspend & operating modes§usb full speed signaling bit rate§usb high powered, bus powered device§supports usb control and isochronous pipes§supports 8 isochronous interface alternates of up to 7.5mbps usb transfer rate§256kx16, 5v, edo,

16、 cas-before-ras refresh, 60ns dram required§camera interface: 16-bit yuv 4:2:2/rgb raw data formats (two channels) or 8-bit y 4:0:0/rgb raw data formats (one channel only) §supportsclamping,down-scaling&filteringcircuitsfordifferentvideoformats (vga/sif/qsif or cif/sif/qcif/qsif)§

17、supports proprietary real-time compression engine of up to 8:1 (1015fps at vga)§vga resolution uncompressed still image with snapshot button§supports sccb (serial camera control bus) master function running at 100khz (normal mode)§supports programmable led control§supports progra

18、mmable switching power clock with frequencies of 24k/48k/96k/192khz 42 architecture2.1 general description2ov511+based on ov511, is a low cost and highly integrated solution for usb pc camera applications. it remains ov511s performance unchanged or is improved, while some new features were implement

19、ed. new features include built-in usb transceiver with selectable external usb transceiver interface, more effective packet size of the isochronous pipe, programmable led control, programmable switching power clock with frequencies of 24k/48k/96k/192khz, etc. ov511+is a usb pc camera controller that

20、 includes a proprietary compression engine supporting real time image transfer through usb bus. a complete usb camera system consistsof ov511+, a 256kx16 edo dram, and a digital camera such as ov7620 for vga resolution orov6620 for cif resolution.camera interface generates different image formats by

21、 taking either 16-bit yuv 4:2:2/rgb rawdata or 8-bit y 4:0:0/rgb raw data inputs. omnice is the proprietary compression engine. it notonly performs 1015fps for vga and 30fps for cif, but also allows very fast decompression withlow cpu utilization. depending on the camera device that is built with th

22、e system, either sccbor parallel io bus can be chosen. the sccb bus master uses two dedicated pins “sio-0” & “sio-1”, while the pio shares with y & uv buses. snapshot button allows users to take a highquality, vga resolution uncompressed still imagethe functional blocks of ov511+, as shown i

23、n the following figure, consist of camera interface,dram interface, omnice, udc interface, iso fifo, system control, sccb and pio.figure 1. functional block diagram256kx16 dramov7610ov662048mhzusbhrefvsyncpclk8/16 bit buscamerainterfacecontrol16draminterfaceudcinterface168omniceiso fifousbxver5usb d

24、evice controller 16 82.2 functional description2.2.1 camera interfaceov511+ digital video inputs are either 16-bit yuv 4:2:2/rgb raw data formats (two channels) or8-bit y 4:0:0/rgb raw data formats (one channel only). clamping, downscaling & filtering functions are also supported by camera inter

25、face. however, it doesnt guarantee that all input formats can be compressed by omnice.table 1. capability of camera interfacechannelsinputformatsclamping down-scalingfilteringcompression(omnice)2, 16-bit (y & uv)1, 8-bit (y only)yuv 4:2:216-bit rgb rawy 4:0:08-bit rgb rawavailableavailableavaila

26、bleavailableavailableavailableavailableavailableavailableavailableavailablenot availableavailablenot availableavailablenot availableif the camera input format is 16-bit yuv 4:2:2 mode, the output of the camera interface can beconfigured as yuv 4:2:0 or 4:0:0, as well as yuv 4:2:2.the maximum clamped

27、 image size is 1024 pixels wide and 1024 lines height in increment of 8,depending on the camera input format. the actual image size is limited by the capability of dram.table 2. maximum pixel count of one 256kx16 dramoutput formats of camera interfaceyuv 4:2:2yuv 4:2:0y 4:0:0pixel count256k344k512kt

28、he downscaling function sub-samples the image in both horizontal & vertical directions by choosing scaling factor 1, 2, 4 or 8. no up-scaling feature is implemented.the anti-aliasing filter decimates downscaling images to get rid of alias and improve image quality.figure 2. camera interface yuv

29、- 4:2:2 - 16-bit horizontal timing waveformscclkpclktriggers data at rising edgehrefy10hbeginning of an active liney0y1y2y3end of an active liney636y637y638y63910huv80hu0v0u2v2u636v636u638v63880hfigure 3. camera interface vertical interlace timing waveformsvsyncfoddhref479480122392406241242figure 4.

30、 camera interface vertical progressive timing waveformsvsyncfoddhref122.2.2 dram interface479480dram interface generates dram addresses for write and read cycles based on the configuredimage size and data format. external dram is partitioned according to the data formats such as4:2:2, 4:2:0 or 4:0:0

31、.dram interface also arbitrates the dram access between write request from the camera interface and read request from omnice. it also performs the flow control to avoid image overflow and underflow conditions occurred.ov511+supports 5v edo, cas-before-ras refresh, 60ns dram.figure 5. memory map4:2:200000y1ffff20000u2ffff30000v3ffff4:2:000000y2afff2b000u357ff35800u3ffff4:0:000000raw3fffffigure 6. dram interface write cycle timing waveformstrasptrahras_cas_we_addrdatatcastrcdrowcoltds7tdhtpctasctcahfigure 7. dram interface read cycle timing wav