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WM8940CGEFL/RV 数据表(PDF) 75 Page - Wolfson Microelectronics plc |
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WM8940CGEFL/RV 数据表(HTML) 75 Page - Wolfson Microelectronics plc |
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75 / 91 page  Production Data WM8940 w PD, Rev 4.3, November 2011 75 REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION REFER TO 1 AUTOINC 1 Auto-Incremental write enable 0=Auto-Incremental writes disabled 1=Auto-Incremental writes enabled Control Interface 0 0 Reserved 10 (0Ah) 15:7 00 Reserved 6 DACMU 0 DAC soft mute enable 0 = DACMU disabled 1 = DACMU enabled Output Signal Path 5:3 00 Reserved 2 AMUTE 0 DAC auto mute enable 0 = auto mute disabled 1 = auto mute enabled Output Signal Path 1 0 Reserved 0 DACPOL 0 DAC Polarity Invert 0 = No inversion 1 = DAC output inverted Output Signal Path 11 (0Bh) 15:8 00h Reserved 7:0 DACVOL 11111111 DAC Digital Volume Control 0000 0000 = Digital Mute 0000 0001 = -127dB 0000 0010 = -126.5dB … 0.5dB steps up to 1111 1111 = 0dB Output Signal Path 12 (0Ch) 15:0 Reserved 13 (0Dh) 15:0 Reserved 14 (0Eh) 15:9 00h Reserved 8 HPFEN 1 High Pass Filter Enable 0=disabled 1=enabled Analogue to Digital Converter (ADC) 7 HPFAPP 0 Select audio mode or application mode 0=Audio mode (1 st order, fc = ~3.7Hz) 1=Application mode (2 nd order, fc = HPFCUT) Analogue to Digital Converter (ADC) 6:4 HPFCUT 000 Application mode cut-off frequency See Table 14 for details. Analogue to Digital Converter (ADC) 3:1 00 Reserved 0 ADCPOL 0 ADC Polarity 0=normal 1=inverted Analogue to Digital Converter (ADC) 15 (0Fh) 15:8 00h Reserved 7:0 ADCVOL 11111111 ADC Digital Volume Control 0000 0000 = Digital Mute 0000 0001 = -127dB 0000 0010 = -126.5dB ... 0.5dB steps up to 1111 1111 = 0dB Analogue to Digital Converter (ADC) 16 (10h) 15 NF0_UP 0 Notch filter 0 update. The notch filter 0 values used internally only update when one of the NF0_UP bits is set high. Analogue to Digital Converter (ADC) 14 NF0_EN 0 Notch filter 0 enable: 0=Disabled 1=Enabled Analogue to Digital Converter (ADC) |
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