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CXD2724AQ-3 Datasheet(PDF) 59 Page - Sony Corporation |
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CXD2724AQ-3 Datasheet(HTML) 59 Page - Sony Corporation |
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59 / 65 page  – 59 – CXD2724AQ-3 (7) Delay Time Settings [Relevant data] Coefficients: Ltp0 (81H), Ltp1 (82H), Ltp2 (83H), Ltp3 (84H), Ltp4 (85H), Rtp0 (86H), Rtp1 (87H), Rtp2 (88H), Rtp3 (89H), Rtp4 (8aH), Stp0 (8bH), Stp1 (8cH), Stp2 (8dH), Stp3 (8eH), tp_fb (8fH), ap0_in (90H), ap0_out (91H), ap1_in (92H), ap1_out (93H) Setup: SQA05, SQA04, SQC07, SQC06 First, select No decimation, 1/2 decimation or 1/3 decimation. 1/1 (No decimation): SQA11, 10 = "00", SQC07, 06 = "00" 1/2 decimation: SQA11, 10 = "01", SQC07, 06 = "01" 1/3 decimation: SQA11, 10 = "10", SQC07, 06 = "1∗" (∗ = Don't care) Next, set tp_fb (8fH) which determines the comb filter delay time, and ap0_in (90H), ap0_out (91H), ap1_in (92H) and ap1_out (93H) which determine the all pass filter delay times. The following conditions apply. • 0 ≤ tp_fb, tp_fb + 0020H ≤ ap0_in ≤ ap0_out, ap0_out + 0020H ≤ ap1_in ≤ ap1_out ≤ bfe0H • 0 ≤ Comb filter tap (Ltp0 to Stp3) ≤ tp_fb Note) The minimum unit for all the above coefficients is "0020H". Values larger than this are ignored. (7)-1. Comb Filter First, set the comb filter maximum delay time tp_fb (8fH). The coefficient value is calculated as follows. (Dly) Decimal = (Delay [s]) × fs [Hz] × 32 (The delay value is multiplied by 1/2 and 1/3 during 1/2 and 1/3 decimation, respectively.) Next set the delay times for the comb filter taps, and calculate the coefficient values in the same manner as for tp_fb. (0 ≤ Tap ≤ tp_fb) Example) For a maximum delay time of 36ms (1/2 decimation, fs = 44100Hz) 0.036 × (1/2) × 44100 × 32 = 25401.6 Rounding up to 25402 and converting to hexadecimal notation: 633aH However, the address is specified in 0020H increments, so this becomes: 6340H Therefore, set all (14) of the L, R and S channel taps to 6340H (36 ms) or less. For example, the L channel settings could be: Ltp0 = 1ba0H (10ms) Ltp1 = 2960H (15ms) Ltp2 = 3720H (20ms) Ltp3 = 44e0H (25ms) Ltp4 = 52c0H (30ms) Set the R and S channels in the same manner. |
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Similar Description - CXD2724AQ-3 |
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