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VD6640 Datasheet(PDF) 69 Page - STMicroelectronics |
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VD6640 Datasheet(HTML) 69 Page - STMicroelectronics |
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69 / 126 page  DocID023597 Rev 11 69/126 VG6640, VD6640 Video data interface 125 Data synchronization methods External capture systems may synchronize with the data output using ITU-R BT.601 compatible hardware synchronization signals, consisting of horizontal sync (HSYNC) and vertical sync (VSYNC). The synchronization signals can be configured to meet the needs of the companion device. Pixel clock (PIX-CLK) The pixel clock is programmable such that data may be clocked on the rising or falling edge of the pixel clock. 5.2.2 Frame format - hardware synchronization The image sensor provides two programmable hardware synchronization signals: VSYNC and HSYNC. The position of these signals within the image frame is automatically set so that the signals track the active video portion of the output frame regardless of its size. Figure 17. Hardware synchronization frame structure 1 0 VSYNC Visible pixel data Header embedded data lines Inter-frame blanking (active lines) Inter- line blanking time (shown vertically) time HSYNC signal 0 1 signal Note: The polarity of HSYNC and/or VSYNC may be reversed Trailer embedded data lines ASIL data lines |
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