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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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WM8985GEFL/R датащи(PDF) 30 Page - Wolfson Microelectronics plc |
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WM8985GEFL/R датащи(HTML) 30 Page - Wolfson Microelectronics plc |
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30 / 121 page  WM8985 Production Data w PD, Rev 4.6, July 2009 30 REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION R44 (2Ch) Input Control 0 LIP2INPPGA 1 Connect LIP pin to left channel input PGA amplifier positive terminal. 0 = LIP not connected to input PGA 1 = input PGA amplifier positive terminal connected to LIP (constant input impedance) 1 LIN2INPPGA 1 Connect LIN pin to left channel input PGA negative terminal. 0 = LIN not connected to input PGA 1 = LIN connected to input PGA amplifier negative terminal. 2 L2_2INPPGA 0 Connect L2 pin to left channel input PGA positive terminal. 0 = L2 not connected to input PGA 1 = L2 connected to input PGA amplifier positive terminal (constant input impedance). 4 RIP2INPPGA 1 Connect RIP pin to right channel input PGA amplifier positive terminal. 0 = RIP not connected to input PGA 1 = right channel input PGA amplifier positive terminal connected to RIP (constant input impedance) 5 RIN2INPPGA 1 Connect RIN pin to right channel input PGA negative terminal. 0 = RIN not connected to input PGA 1 = RIN connected to right channel input PGA amplifier negative terminal. 6 R2_2INPPGA 0 Connect R2 pin to right channel input PGA positive terminal. 0 = R2 not connected to input PGA 1 = R2 connected to input PGA amplifier positive terminal (constant input impedance). Table 6 Input PGA Control INPUT PGA VOLUME CONTROLS The input microphone PGAs have a gain range from -12dB to +35.25dB in 0.75dB steps. The gain from the LIN/RIN input to the PGA output and from the L2/R2 amplifier to the PGA output are always common and controlled by the register bits INPPGAVOLL[5:0] and INPPGABVOLR[5:0]. These register bits also affect the LIP pin when LIP2INPPGA=1, the L2 pin when L2_2INPPGA=1, the RIP pin when RIP2INPPGA=1 and the L2 pin when L2_2INPPGA=1. When the Automatic Level Control (ALC) is enabled the input PGA gains are controlled automatically and the INPPGAVOLL and INPPGAVOLR bits should not be used. |
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