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CS4237B Datasheet(PDF) 52 Page - Cirrus Logic |
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CS4237B Datasheet(HTML) 52 Page - Cirrus Logic |
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52 / 114 page  Left MIC Volume (X2) Default = 11001111 D7 D6 D5 D4 D3 D2 D1 D0 LMIM LMOM LMBST LMG4 LMG3 LMG2 LMG1 LMG0 LMG4-LMG0 Left Microphone Gain. The least significant bit represents 1.5 dB, with 01111 = 0 dB. See Table 13. LMBST Left Microphone 20 dB boost. When set to 1, the signal to the out- put mixer is given a 20 dB boost. LMOM Left Microphone Output Mixer Mute. When set to 1, the signal to the out- put mixer is muted. LMIM Left Microphone Input Mixer Mute. When set to 1, the signal to the in- put mixer is muted. Right MIC Volume (X3) Default = 11001111 D7 D6 D5 D4 D3 D2 D1 D0 RMIM RMOM RMBST RMG4 RMG3 RMG2 RMG1 RMG0 RMG4-RMG0 Right Microphone gain. The least significant bit represents 1.5 dB, with 01111 = 0 dB. See Table 13. RMBST Right Microphone 20 dB boost. When set to 1, the signal to the out- put mixer is given a 20 dB boost. RMOM Right Microphone Output Mixer Mute. When set to 1, the signal to the out- put mixer is muted. RMIM Right Microphone Input Mixer Mute. When set to 1, the signal to the in- put mixer is muted. Synthesis and Input Mixer Control (X4) Default = 100001xx D7 D6 D5 D4 D3 D2 D1 D0 MIMR LIS1 LIS0 IFM WTRMD FMRM res res res Reserved. Must write 0. Could be read as 0 or 1. FMRM FM Volume Control Remap. This bit only functions when IFM = 1. If FMRM = 1, internal FM Synthesis volume is controlled by I18/I19 (writes to I18/I19 get remapped to X6/X7). Analog LINE volume is con- trolled by X0/X1. If FMRM = 0, internal FM synthesis volume is controlled by X6/X7 only. WTRMD WaveTable Volume Remap Disable. This bit only functions when WTEN = 1 (C8/Global Config. byte). If WTRMD = 0, the Wavetable Serial Port volume is controlled by I18/I19 (writes to I18/I19 get remapped to X16/X17). Analog LINE volume is controlled by X0/X1. If WTRMD = 1, the Wavetable Serial Port volume is controlled by X16/X17 only. NOTE: If FMRM = 1, and WTRMD = 0, I18/I19 control both in- ternal FM and Wavetable Serial Port volume. IFM Internal FM enable. When set to 1, the internal FM synthesis engine is enabled. Setting this bit also changes I6/7 from the master digital audio volume to the ISA bus wave volume control. X14/15 becomes the LMG4-G0 LMIC Input LMIM LMOM To Output Mixer To Input Mixer +22.5 to -22.5 dB LMBST +20 dB RMG4-G0 RMIC Input RMIM RMOM To Output Mixer To Input Mixer +22.5 to -22.5 dB RMBST +20 dB DS213PP4 CS4237B 52 |
Similar Part No. - CS4237B |
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Similar Description - CS4237B |
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