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WM8533 датащи(PDF) 22 Page - Wolfson Microelectronics plc |
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WM8533 датащи(HTML) 22 Page - Wolfson Microelectronics plc |
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22 / 41 page ![]() WM8533 Production Data w PD, July 2012, Rev 4.0 22 REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION R3 (03h) AIF_CTRL1 7 AIF_MSTR 0 Master/Slave Select 0 = Slave 1 = Master R4 (04h) AIF_CTRL2 5:3 AIF_BCLKD IV [2:0] 000 BCLK Divider Control (Master Mode) 000 = MCLK/4 001 = MCLK/8 010 = 32fs 011 = 64fs 100 = 128fs 101 to 111 = Reserved 2:0 AIF_SR [2:0] 000 MCLK:LRCLK Ratio 000 = Auto detect 001 = 128fs 010 = 192fs 011 = 256fs 100 = 384fs 101 = 512fs 110 = 768fs 111 = 1152fs Table 9 DAC Clocking Mode Control Interface timing is such that the input data and left/right clock are sampled on the rising edge of BCLK. By setting the appropriate BCLK and LRCLK polarity bits, the WM8533 DAC can sample data on the opposite clock edges. The control of audio interface formats and clock polarities is summarised in Table 10. REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION R3 (03h) AIF_CTRL1 6 AIF_LRCLK _INV 0 LRCLK Inversion Control 0 = Normal polarity 1 = Inverted polarity When AIF_FMT [1:0]=11 (DSP Mode): 0 = Mode A (2nd clock) 1 = Mode B (1st clock) 5 AIF_BCLK_ INV 0 BCLK Inversion Control Slave mode: 0 = use rising edge 1 = use falling edge Master mode: 0 = BCLK normal 1 = BCLK inverted 4:3 AIF_WL [1:0] 10 Audio Data Word Length 00 = 16 bits 01 = 20 bits 10 = 24 bits 11 = 32 bits 1:0 AIF_FMT [1:0] 10 Audio Data Interface Format 00 = Right justified 01 = Left justified 10 = I2S format 11 = DSP mode Table 10 Audio Interface Control |
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