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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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WM8731 датащи(PDF) 25 Page - Wolfson Microelectronics plc |
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WM8731 датащи(HTML) 25 Page - Wolfson Microelectronics plc |
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25 / 56 page  WM8731 Advanced Information WOLFSON MICROELECTRONICS LTD AI Rev 2.0 February 2001 25 VMID FROM LINE INPUTS LINEOUT FROM DAC BYPASS TO HEADPHONE AMP DACSEL FROM MICROPHONE INPUT SIDETONE Figure 18 Line Output Schematic The DAC output, Line Input and microphone are summed into the Line Output. In DAC mode only the output from the DAC is routed to the line outputs. In Bypass mode the Line Input is summed into the Line Outputs. In Side Tone mode the Microphone Input is summed into the Line Output. These features can be used for either over-dubbing or, if the DAC is muted, as a pure analogue bypass or Side Tone feature, so avoiding any digital signal processing. The line output is muted by either muting the DAC (analogue) or Soft Muting (digital) and disabling the BYPASS and SIDETONE paths. Refer to the DAC section for more details. Whenever the DAC is muted or the device placed into standby mode the DC voltage is maintained at the line outputs to prevent any audible clicks from being present. The software control for the line outputs is shown in Table 7. REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION 3 BYPASS 1 Bypass Switch 1 = Enable Bypass 0 = Disable Bypass 4 DACSEL 0 DAC Select 1 = Select DAC 0 = Don’t select DAC 0000100 Analogue Audio Path Control 5SIDETONE 0 Side Tone Switch 1 = Enable SideTone 0 = Disable Side Tone Table 7 Output Software Control The recommended external components are shown in Figure 19. |
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