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DM3725 Datasheet(PDF) 182 Page - Texas Instruments |
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DM3725 Datasheet(HTML) 182 Page - Texas Instruments |
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182 / 268 page  DM3730, DM3725 SPRS685 – AUGUST 2010 www.ti.com 6.5 Multimedia Interfaces 6.5.1 Camera ISP2P Interface NOTE For more information, see Camera ISP chapter of the AM/DM37x Multimedia Device Technical Reference Manual (literature number SPRUGN4). The camera subsystem provides the system interfaces and the processing capability to connect raw, YUV or JPEG image sensor modules to the device for video-preview, video-record and still-image-capture applications. The camera ISP2P subsystem supports up to two simultaneous pixel flows but only one of them can use the video processing hardware: • Parallel camera interface + Serial camera interface: one interface data goes through the video processing hardware. The other interface data goes directly to memory • Serial camera interface + Serial camera interface: one serial interface data goes through the video processing hardware. The other serial interface data goes directly to memory. The camera ISP2P subsystem supports different camera configurations: • 10-bit Parallel interface • 12-bit Parallel interface • 12-bit Parallel interface Note: For more information, see the Camera ISP / Camera ISP Environment / Camera ISP Connectivity Schemes section of the AM/DM37x Multimedia Device Technical Reference Manual (literature number SPRUGN4). 6.5.1.1 Camera Output Clocks (cam_xclka and cam_xclkb) Table 6-16. ISP2P cam_xclka and cam_xclkb Output Clocks Switching Characteristics NO. PARAMETER OPP100 OPP50 UNIT MIN MAX MIN MAX ISP15 1 / tc(xclk) Frequency(1), output clock cam_xclkn(4) 216 216 MHz ISP16 tw(xclkH) Typical pulse duration, output clock cam_xclkn(4) high 0.5P(2) 0.5P(2) ns ISP16 tw(xclkL) Typical pulse duration, output clock cam_xclkn(4) low 0.5P(2) 0.5P(2) ns tdc(xclk) Duty cycle error, output clock cam_xclkn(4) 231 231 ps tJ(xclk) Jitter standard deviation(3), output clock cam_xclkn(4) 33 33 ps tR(xclk) Rise time, output clock cam_xclkn(4) 0.93 0.93 ns tF(xclk) Fall time, output clock cam_xclkn(4) 0.93 0.93 ns (1) Related with the cam_xclkn(4) maximum and minimum frequencies programmable in the ISP module. NOTE: You must disable the camera sensor or the camera module to change the frequency configuration. For more information, see the AM/DM37x Multimedia Device Technical Reference Manual (literature number SPRUGN4). (2) P = cam_xclkn(4) period in ns (3) The jitter probability density can be approximated by a Gaussian function. (4) In cam_xclkn, n is equal to a or b. 6.5.1.2 Parallel Camera Interface (CPI) 6.5.1.2.1 CPI—Video and Graphics Digitizer 1.8V Mode The imaging subsystem deals with the processing of the pixel data coming from an external image sensor or from video and graphics digitizer. It is a key component for the following multimedia applications: video preview, camera viewfinder, video record and still image capture. It supports RAW, RGB, and YUV data processing. 182 Timing Requirements and Switching Characteristics Copyright © 2010, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): DM3730 DM3725 |
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