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AD9948 Datasheet(PDF) 21 Page - Analog Devices |
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AD9948 Datasheet(HTML) 21 Page - Analog Devices |
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21 / 28 page  REV. 0 AD9948 –21– LINE0 GAIN0, GAIN1, GAIN0, GAIN1, ... RR Gr Gr LINE1 LINE2 GAIN2, GAIN3, GAIN2, GAIN3, ... GAIN0, GAIN1, GAIN0, GAIN1, ... COLOR STEERING MODE: PROGRESSIVE RR Gr Gr Gb B CCD: PROGRESSIVE BAYER Gb B Gb B Gb B Figure 17a. CCD Color Filter Example—Progressive Scan The same Bayer pattern can also be interlaced, and the interlaced mode should be used with this type of CCD (see Figure 17b). The color steering performs the proper multiplexing of the R, G, and B gain values (loaded into the PxGA gain registers), and is synchronized by the user with vertical (VD) and horizontal (HD) sync pulses. For timing information, see Figure 18b. LINE0 GAIN0, GAIN1, GAIN0, GAIN1, ... RR Gr Gr LINE1 LINE2 GAIN0, GAIN1, GAIN0, GAIN1, ... GAIN0, GAIN1, GAIN0, GAIN1, ... Gb Gb BB LINE0 GAIN2, GAIN3, GAIN2, GAIN3, ... LINE1 LINE2 GAIN2, GAIN3, GAIN2, GAIN3, ... GAIN2, GAIN3, GAIN2, GAIN3, ... COLOR STEERING MODE: INTERLACED Gb Gb BB Gb Gb BB Gb Gb BB RR Gr Gr RR Gr Gr RR Gr Gr EVEN FIELD ODD FIELD CCD: INTERLACED BAYER Figure 17b. CCD Color Filter Example—Interlaced Readout A third type of readout uses the Bayer pattern divided into three different readout fields. The three-field mode should be used with this type of CCD (see Figure 17c). The color steering performs the proper multiplexing of the R, G, and B gain values (loaded into the PxGA gain registers), and is synchronized by the user with vertical (VD) and horizontal (HD) sync pulses. For timing information, see Figure 18c. LINE0 GAIN0, GAIN1, GAIN0, GAIN1, ... RR Gr Gr LINE1 LINE2 GAIN2, GAIN3, GAIN2, GAIN3, ... GAIN0, GAIN1, GAIN0, GAIN1, ... LINE0 GAIN2, GAIN3, GAIN2, GAIN3, ... LINE1 LINE2 GAIN0, GAIN1, GAIN0, GAIN1, ... GAIN2, GAIN3, GAIN2, GAIN3, ... COLOR STEERING MODE: THREE FIELD Gb Gb BB Gb Gb BB RR Gr Gr FIRST FIELD SECOND FIELD CCD: 3-FIELD READOUT LINE0 GAIN0, GAIN1, GAIN0, GAIN1, ... RR Gr Gr LINE1 LINE2 GAIN2, GAIN3, GAIN2, GAIN3, ... GAIN0, GAIN1, GAIN0, GAIN1, ... RR Gr Gr THIRD FIELD Gb Gb BB Gb Gb BB RR Gr Gr RR Gr Gr Gb Gb BB Gb Gb BB Figure 17c. CCD Color Filter Example—Three-Field Readout |
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