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STV0974E Fiches technique(PDF) 28 Page - STMicroelectronics |
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STV0974E Fiches technique(HTML) 28 Page - STMicroelectronics |
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28 / 69 page ![]() 28/61 STV0974 Functional description 4.6 Video output interface 4.6.1 Video synchronization The STV0974 supports two modes of data stream synchronization. Either the data stream can be synchronized by separate HSYNC and VSYNC signal (see Section 4.6.3) or by Synchronization codes in the data stream (see Section 4.6.2). 4.6.2 Synchronization codes Horizontal synchronization The horizontal synchronization signal can be embedded within the data. Figure 13 represents the synchronization codes generated in a line. Vertical synchronization Note: The horizontal synchronization is not sent during vertical blanking. Figure 13: Embedded code horizontal timing Figure 14: Embedded codes in vertical timing F F 0 0 0 0 X Y 8 0 1 0 8 0 1 0 8 0 1 0 8 0 1 0 F F 0 0 0 0 X Y F F 0 0 0 0 X Y SAV Code EAV Code LINE BLANKING 4 4 START OF DIGITAL LINE START OF DIGITAL ACTIVE LINE NEXT LINE 4-data packet D 0 D 1 D 2 D 3 D 0 D 1 D 2 D 3 D 2 D 3 EAV Code 8 0 EAV Code 1 0 8 0 1 0 F F 0 0 0 0 X Y 1 0 1 0 8 0 8 0 1 0 1 0 8 0 8 0 1 0 1 0 8 0 F F 0 0 0 0 X Y SAV Code 8 0 1 0 1 0 8 0 8 0 1 0 1 0 8 0 8 0 START OF DIGITAL FRAME END OF DIGITAL FRAME FRAME BLANKING |
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