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WM8959 Datasheet(PDF) 48 Page - Wolfson Microelectronics plc |
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WM8959 Datasheet(HTML) 48 Page - Wolfson Microelectronics plc |
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48 / 155 page  WM8959 Pre-Production w PP, May 2008, Rev 3.1 48 INPUT MIXER VOLUME CONTROL The Input Mixer volume controls are described in Table 12 for the Left Channel and Table 13 for the Right Channel. The Input PGA levels may be set to Mute, 0dB or 30dB boost. The other gain controls provide adjustment from -12dB to +6dB in 3dB steps. To prevent pop noise it is recommended that gain and mute controls for the input mixers are not modified while the signal paths are active. If volume control is required on the input signal path it is recommended that the input PGA volume controls are used instead of the input mixer gain registers. REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION 8 L34MNB 0b LIN34 PGA Output to INMIXL Mute 0 = Mute 1 = Un-Mute 7 L34MNBST 0b LIN34 PGA Output to INMIXL Gain 0 = 0dB 1 = +30dB 5 L12MNB 0b LIN12 PGA Output to INMIXL Mute 0 = Mute 1 = Un-Mute R41 (29h) 4 L12MNBST 0b LIN12 PGA Output to INMIXL Gain 0 = 0dB 1 = +30dB 8:6 LI2BVOL [2:0] 000b (Mute) LIN2 Pin to INMIXL Gain and Mute 000 = Mute 001 = -12dB 010 = -9dB 011 = -6dB 100 = -3dB 101 = 0dB 110 = +3dB 111 = +6dB 5:3 LR4BVOL [2:0] 000b (Mute) RXVOICE to AINLMUX Gain and Mute 000 = Mute 001 = -12dB 010 = -9dB 011 = -6dB 100 = -3dB 101 = 0dB 110 = +3dB 111 = +6dB R43 (2Bh) 2:0 LL4BVOL [2:0] 000b (Mute) RXVOICE to INMIXL Gain and Mute 000 = Mute 001 = -12dB 010 = -9dB 011 = -6dB 100 = -3dB 101 = 0dB 110 = +3dB 111 = +6dB Note - LR4BVOL must be set to the same value as LL4BVOL when AINLMODE=01. Table 12 Left Input Mixer Volume Control |
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