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WM8580 датащи(PDF) 35 Page - Wolfson Microelectronics plc |
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WM8580 датащи(HTML) 35 Page - Wolfson Microelectronics plc |
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35 / 92 page ![]() Production Data WM8580 w PD Rev 4.0 February 2007 35 DE-EMPHASIS MODE A digital de-emphasis filter may be applied to each DAC channel. The de-emphasis filter for each stereo channel is enabled under the control of DEEMP[2:0]. DEEMP[0] enables the de-emphasis filter for DAC 1, DEEMP[1] enables the de-emphasis filter for DAC 2, and DEEMP[2] enables the de- emphasis filter for DAC 3. REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION 2:0 DEEMP[2:0] 000 De-emphasis mode select: DEEMP[0] = 1, enable De- emphasis on DAC1. DEEMP[1] = 1, enable De- emphasis on DAC2. DEEMP[2] = 1, enable De- emphasis on DAC3. R17 DAC CONTROL 3 11h 4 DEEMPALL 0 0 = De-emphasis controlled by DEEMP[2:0] 1 = De-emphasis enabled on all DACs Table 27 De-emphasis Register Refer to Figure 41, Figure 42, Figure 43, Figure 44, Figure 45 and Figure 46 for details of the De- Emphasis modes at different sample rates. DAC OUTPUT PHASE The DAC Phase control word determines whether the output of each DAC is non-inverted or inverted REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION R18 DAC CONTROL 4 12h 5:0 PHASE [5:0] 111111 Controls phase of DAC outputs 0 = non-inverted 1 = inverted PHASE[0] = 1 inverts phase of DAC1L output PHASE[1] = 1 inverts phase of DAC1R output PHASE[2] = 1 inverts phase of DAC2L output PHASE[3] = 1 inverts phase of DAC2R output PHASE[4] = 1 inverts phase of DAC3L output PHASE[5] = 1 inverts phase of DAC3R output Table 28 DAC Output Phase Register |
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