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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STA381BW датащи(PDF) 58 Page - STMicroelectronics |
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STA381BW датащи(HTML) 58 Page - STMicroelectronics |
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58 / 171 page  Register description: New Map STA381BW 58/171 Doc ID 018835 Rev 7 Note: (*): Clock is BICKI 6.13.2 Interpolation ratio selection The STA381BW has variable interpolation (oversampling) settings such that internal processing and FFX output rates remain consistent. The first processing block interpolates by either 3 times (Table 83: PLL register 0x56 bits D0), 2 times or 1 time (pass-through) or provides a 2-times downsample. The oversampling ratio of this interpolation is determined by the IR bits. 6.13.3 Fault-detect recovery bypass Table 28. Input sampling rates Input sampling rate fs (kHz) IR MCS[2:0] 111 110 101 100 011 010 001 000 32, 44.1, 48 00 64*fs(*) NA 576 * fs 128 * fs 256 * fs 384 * fs 512 * fs 768 * fs 88.2, 96 01 64*fs(*) 32*fs(*) NA 64 * fs 128 * fs 192 * fs 256 * fs 384 * fs 176.4, 192 1X 64*fs(*) 32*fs(*) NA 32 * fs 64 * fs 96 * fs 128 * fs 192 * fs Table 29. Internal interpolation ratio Bit R/W RST Name Description 4:3 R/W 00 IR [1:0] Selects internal interpolation ratio based on input I2S sampling frequency Table 30. IR bit settings as a function of the input sampling rate Input sampling rate fs (kHz) IR 1st stage interpolation ratio 32 00 2-times oversampling 44.1 00 2-times oversampling 48 00 2-times oversampling 88.2 01 Pass-through 96 01 Pass-through 176.4 10 2-times downsampling 192 10 2-times downsampling Table 31. Fault-detect recovery bypass Bit R/W RST Name Description 7R/W 0 FDRB 0: fault-detect recovery enabled 1: fault-detect recovery disabled |
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