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VS6724 Datasheet(PDF) 10 Page - STMicroelectronics |
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VS6724 Datasheet(HTML) 10 Page - STMicroelectronics |
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10 / 118 page  Functional description VS6724 10/118 2 Functional description The VS6724 simplified block diagram is shown in Figure 1, with the following main blocks: ● UXGA-sized pixel array ● Video pipe ● Statistics gathering unit ● Clock generator ● Microprocessor ● Video timing generator Figure 1. Simplified block diagram 2.1 Operation A video timing generator controls a UXGA-sized pixel array to produce raw Bayer images. The analogue pixel information is digitized and passed into the video pipe. The video pipe contains a number of different functions (explained in detail later). At the end of the video pipe, data is output to the host system over an 8-bit parallel interface along with qualification signals. The whole system is controlled by an embedded microprocessor that is running firmware stored in an internal ROM. The external host communicates with this microprocessor over an I²C interface. The microprocessor does not handle the video data itself but is able to control all the functions within the video pipe. Real-time information about the video data is gathered by a statistics engine and is available to the microprocessor. The processor uses this information to perform real-time image control tasks such as automatic exposure control. Microprocessor SDA SCL CE AVDD HSYNC PCLK D[0:7] CLK VSYNC Clock Generator I²C Statistics Gathering Video Timing Generator RESET VREG VDD I²C Interface FSO GND GND UXGA Pixel Array Video Engine (JPEG Output Coder Bypass Bypass Bypass Video engine) Compressor |
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