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AD9983A/PCB 数据表(PDF) 15 Page - Analog Devices |
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AD9983A/PCB 数据表(HTML) 15 Page - Analog Devices |
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15 / 44 page ![]() Preliminary Technical Data AD9983A Rev. PrA | Page 15 of 44 The polarity of the coast signal may be set through the coast polarity register (Register 0x18, Bits[6:5]). Also, the polarity of the Hsync signal can be set through the Hsync polarity register (Register 0x12, Bits[5:4]). For both Hsync and coast, a value of 1 is active high. The internal coast function is driven off the Vsync signal, which is typically a time when Hsync signals may be disrupted with extra equalization pulses. Table 10. Recommended VCO Range and Charge Pump and Current Settings for Standard Display Formats Standard Resolution Refresh Rate (Hz) Horizontal Frequency (kHz) Pixel Rate (MHz) PLL Divider VCO Range Current VCO Gear (R0x36[0]) VGA 640 × 480 60 31.500 25.175 800 00 101 0 72 37.700 31.500 832 01 100 0 75 37.500 31.500 840 01 100 0 85 43.300 36.000 832 01 100 0 SVGA 800 × 600 56 35.100 36.000 1024 01 100 0 60 37.900 40.000 1056 01 101 0 72 48.100 50.000 1040 01 101 0 75 46.900 49.500 1056 01 101 0 85 53.700 56.250 1048 01 110 0 XGA 1024 × 768 60 48.400 65.000 1344 10 100 0 70 56.500 75.000 1328 10 101 0 75 60.000 78.750 1312 10 101 0 80 64.000 85.500 1336 10 101 0 85 68.300 94.500 1376 10 110 0 SXGA 1280 × 1024 60 64.000 108.000 1688 10 110 0 75 80.000 135.000 1688 11 110 0 85 91.100 157.500 1728 11 110 0 UXGA 1600 × 1200 60 75.000 162.000 2160 11 110 0 TV 480i 30 15.750 13.510 858 00 101 1 480p 60 31.470 27.000 858 00 101 0 576i 30 15.625 13.500 864 00 101 1 576p 60 31.250 27.000 864 00 101 0 720p 60 45.000 74.250 1650 10 101 0 1035i 30 33.750 74.250 2200 10 101 0 1080i 60 33.750 74.250 2200 10 101 0 1080p 60 67.500 148.500 2200 11 101 0 |
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