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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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WM8978CGEFL/V датащи(PDF) 25 Page - Wolfson Microelectronics plc |
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WM8978CGEFL/V датащи(HTML) 25 Page - Wolfson Microelectronics plc |
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25 / 118 page  Production Data WM8978 w PD, Rev 4.5, October 2011 25 REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION R45 Left channel input PGA volume control 5:0 INPPGAVOLL 010000 Left channel input PGA volume 000000 = -12dB 000001 = -11.25db . 010000 = 0dB . 111111 = 35.25dB 6 INPPGAMUTEL 0 Mute control for left channel input PGA: 0=Input PGA not muted, normal operation 1=Input PGA muted (and disconnected from the following input BOOST stage). 7 INPPGAZCL 0 Left channel input PGA zero cross enable: 0=Update gain when gain register changes 1=Update gain on 1 st zero cross after gain register write. 8 INPPGAUPDATE Not latched INPPGAVOLL and INPPGAVOLR volume do not update until a 1 is written to INPPGAUPDATE (in reg 45 or 46) R46 Right channel input PGA volume control 5:0 INPPGAVOLR 010000 Right channel input PGA volume 000000 = -12dB 000001 = -11.25db . 010000 = 0dB . 111111 = +35.25dB 6 INPPGAMUTER 0 Mute control for right channel input PGA: 0=Input PGA not muted, normal operation 1=Input PGA muted (and disconnected from the following input BOOST stage). 7 INPPGAZCR 0 Right channel input PGA zero cross enable: 0=Update gain when gain register changes 1=Update gain on 1 st zero cross after gain register write. 8 INPPGAUPDATE Not latched INPPGAVOLL and INPPGAVOLR volume do not update until a 1 is written to INPPGAUPDATE (in reg 45 or 46) R32 ALC control 1 8:7 ALCSEL 00 ALC function select: 00=ALC off 01=ALC right only 10=ALC left only 11=ALC both on Table 6 Input PGA Volume Control VOLUME UPDATES Volume settings will not be applied to the PGAs until a ‘1’ is written to one of the INPPGAUPDATE bits. This is to allow left and right channels to be updated at the same time, as shown in Figure 10. |
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