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WM8991 Datasheet(PDF) 149 Page - Wolfson Microelectronics plc |
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WM8991 Datasheet(HTML) 149 Page - Wolfson Microelectronics plc |
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149 / 174 page  Pre-Production WM8991 w PP, May 2008, Rev 3.1 149 REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION 8 DAC_VU N/A DAC Volume Update Writing a 1 to this bit will cause left and right DAC volume to be updated simultaneously Right DAC Digital Volume 7:0 DACR_VOL [7:0] 1100_ 0000b (0dB) Right DAC Digital Volume (See Table 26 for volume settings) 15:13 000b Reserved - Do Not Change 12:9 ADCL_DAC_SVOL [3:0] 0000b Left Channel Digital Sidetone Volume (See Table 23 for volume range) 8:5 ADCR_DAC_SVOL [3:0] 0000b Right Channel Digital Sidetone Volume (See Table 23 for volume range) 4 0b Reserved - Do Not Change 3:2 ADC_TO_DACL [1:0] 00b Left DAC Digital Sidetone Source 00 = No sidetone 01 = Left ADC 10 = Right ADC 11 = Reserved R13 (0Dh) Digital Sidetone 1:0 ADC_TO_DACR [1:0] 00b Right DAC Digital Sidetone Source 00 = No sidetone 01 = Left ADC 10 = Right ADC 11 = Reserved 15:9 00h Reserved - Do Not Change 8 ADC_HPF_ENA 1b ADC Digital High Pass Filter Enable 0 = disabled 1 = enabled 7 0b Reserved - Do Not Change 6:5 ADC_HPF_CUT [1:0] 00b ADC Digital High Pass Filter Cut-Off Frequency (fc) 00 = Hi-fi mode (fc=4Hz at fs=48kHz) 01 = Voice mode 1 (fc=127Hz at fs=16kHz) 10 = Voice mode 2 (fc=130Hz at fs=8kHz) 11 = Voice mode 3 (fc=267Hz at fs=8kHz) (Note: fc scales with sample rate. See Table 18 for cut-off frequencies at all supported sample rates) 4:2 000b Reserved - Do Not Change 1 ADCL_DATINV 0b Left ADC Invert 0 = Left ADC output not inverted 1 = Left ADC output inverted R14 (0Eh) ADC Control 0 ADCR_DATINV 0b Right ADC Invert 0 = Right ADC output not inverted 1 = Right ADC output inverted 15:9 00h Reserved - Do Not Change 8 ADC_VU N/A ADC Volume Update Writing a 1 to this bit will cause left and right ADC volume to be updated simultaneously R15 (0Fh) Left ADC Digital Volume 7:0 ADCL_VOL [7:0] 1100_ 0000b (0dB) Left ADC Digital Volume (See Table 16 for volume range) 15:9 00h Reserved - Do Not Change R16 (10h) Right ADC Digital Volume 8 ADC_VU N/A ADC Volume Update Writing a 1 to this bit will cause left and right ADC volume to be updated simultaneously |
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