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PCM1738E/2K.B bảng dữ liệu(PDF) 34 Page - Texas Instruments |
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PCM1738E/2K.B bảng dữ liệu(HTML) 34 Page - Texas Instruments |
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34 / 47 page ![]() www.ti.com t (BCH) t (BCL) t (LB) t (BCY) WDCK BCK DATAL DATAR t (DS) 1.4V 1.4V 1.4V T0199-01 t (DH) t (BL) PCM1738 SBAS174C – FEBRUARY 2002 – REVISED FEBRUARY 2007 PARAMETER MIN MAX UNIT t(BCY) BCK clock cycle time 18 ns tw(BCL) BCK pulse duration, LOW 7 ns tw(BCH) BCK pulse duration, HIGH 7 ns t(BL) BCK rising edge to WDCK falling edge 5 ns t(LB) WDCK falling edge to BCK rising edge 5 ns t(DS) DATA setup time 5 ns t(DH) DATA hold time 5 ns Figure 43. Audio Interface Timing for External Digital Filter (Internal DF Bypass Mode) Application Table 5. Register Mapping in the External Digital-Filter Mode REGISTER B15 B14 B13 B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 16 W/R 0 0 1 0 0 0 0 –(1) – – – – – – – 17 W/R 0 0 1 0 0 0 1 – – – – – – – – 18 W/R 0 0 1 0 0 1 0 – FMT2 FMT1 FMT0 – – DME(2) – 19 W/R 0 0 1 0 0 1 1 – – – OPE CLKD CLKE – INZD 20 W/R 0 0 1 0 1 0 0 RSV SRST MRST DFTH(2) RSV RSV OS1 OS0 21 R 0 0 1 0 1 0 1 RSV RSV RSV RSV RSV RSV ZFGR ZFGL (1) – = function disabled. No operation regardless of data setting. (2) These bits are required for selection of the external digital-filter mode. FMT[2:0] Audio Data Format Selection These bits are available for read/write. Default Value: 000 FMT[2:0] Audio Data Format Select 000 16-bit, right-justified format (default) 001 20-bit, right-justified format 010 24-bit, right-justified format Other Reserved 34 Submit Documentation Feedback |
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