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WM8224 датащи(PDF) 32 Page - Cirrus Logic |
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WM8224 датащи(HTML) 32 Page - Cirrus Logic |
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32 / 50 page ![]() WM8224 Production Data w PD, Rev 4.2, September 2013 32 SCENARIO 2 Coarse Adjust and Fine Adjust Calibration enabled for the 1 st line, with the Fine Adjust result updated on the 1 st line only. This scenario is suitable for adjusting for black-level d.c. drift on a frame-by-frame basis; there will be no line-by-line variation in the black-level from the BLC circuitry. Table 7 shows which registers are required for this scenario with example settings. SETUP REGISTER BPIX_AVAIL CADUR FRAME_START Value 50 2 1 Table 7 Example Register Settings for Scenario 2 Figure 28 Scenario 2 SCENARIO 3 Coarse Adjust Calibration enabled for the 1 st line, Fine Adjust Calibration enabled every line with the Fine Adjust result accumulated throughout frame and used every line. This scenario allows any variation in the black-level to be tracked throughout the frame by accumulating the Fine Adjust result over multiple lines. This method does not deal with as large amounts of d.c. drift throughout the frame as scenario 1, but it will produce less line-by-line variation. Table 8 shows which registers are required for this scenario with example settings. SETUP REGISTER BPIX_AVAIL CADUR FRAME_START FA_EVERYLINE FA_ACCUM Value 50 2 1 1 1 Table 8 Example Register Settings for Scenario 3 Figure 29 Scenario 3 |
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