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ADV7150LS170 датащи(PDF) 25 Page - Analog Devices |
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ADV7150LS170 датащи(HTML) 25 Page - Analog Devices |
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25 / 36 page ![]() ADV7150 –25– REV. A WHITE LEVEL 100 IRE 43 IRE IOR, IOB IOG mA mA V V 26.67 1.000 0.698 18.62 00 00 8.05 0.302 BLACK/ BLANK LEVEL SYNC LEVEL Figure 31. Composite Video Waveform SYNC WHITE LEVEL BLACK LEVEL 92.5 IRE 7.5 IRE IOR, IOB, IOG mA V 19.05 0.714 00 1.44 0.054 BLANK LEVEL Figure 32. Composite Video Waveform (Pedestal = 7.5 IRE; RSET = 280 Ω) WHITE LEVEL 100 IRE IOR, IOB, IOG mA V 19.05 0.714 00 BLACK/ BLANK LEVEL Figure 33. Composite Video Waveform (Pedestal = 0 IRE; RSET = 259 Ω) RSET ( ) Video Signal 265 SYNC decoded on IOG; Pedestal = 0 IRE 280 No SYNC decoded; Pedestal = 7.5 IRE 259 No SYNC decoded; Pedestal = 0 IRE IPLL Synchronization Output Control This output synchronization signal is used in applications where it is necessary to synchronize multiple palette devices (ADV7150 + ADV7151) to subpixel resolution. Each devices IPLL output signal is in phase with its analog RGB output signal. If multiple devices have differing output delays, the time difference can be derived from the IPLL signals. This time difference is then used to phase shift the CLOCK inputs on one or other of the devices inputs. The IPLL signal is internally triggered by either the falling edge of SYNC or BLANK as determined by CR21 of Command Register 2. |
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