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CS4237B Datasheet(PDF) 43 Page - Cirrus Logic |
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CS4237B Datasheet(HTML) 43 Page - Cirrus Logic |
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43 / 114 page  APAR ADPCM Playback Accumulator Reset. While set, the Playback ADPCM accumulator is held at zero. Used when pausing a playback stream. TEST Factory Test. These bits are used for factory testing and must remain at 0 for normal operation. Left Line (Synthesizer) Volume (I18) Default = xxxxxxxx D7 D6 D5 D4 D3 D2 D1 D0 LLOM LLIM LLBM LLG4 LLG3 LLG2 LLG1 LLG0 LR7 LR6 LR5 LR4 LR3 LR2 LR1 LR0 This register controls either the left LINE input or is remapped to control the internal FM (X6) or external CS9236 Wavetable synthesizer (X16), or both. When no remapping occurs, the bit definitions are: LLG4-LLG0 Left LINE Volume. This register is used to control the LLINE analog in- put volume to the mixers. The least significant bit represents 1.5 dB, with 01000 = 0 dB. See Table 10. LLBM Left LINE Bypass Mute. In MODE 3, when set to 1, the analog Left Line Input, LLINE, (bypassing the gain block) to the input mixer is muted. In MODEs 1 & 2, this bit is not avail- able and is internally controlled by LSS1,0 in I0. LLIM Left LINE Input Mute. In MODE 3, when set to 1, the Left Line Input, LLINE, from the volume control to the input mixer is muted. In MODEs 1 & 2, this bit is not avail- able and internally forced on (muted). LLOM Left LINE Output Mute. When set to 1, the Left Line Input, LLINE, from the volume control to the output mixer is muted. When IFM=1 (X4 or Global Config. byte) and FMRM=1 (X4), FM remapping is enabled. When WTEN=1 (C8 or Global Config. byte) and WTRMD=0 (X4), Wavetable remapping is enabled. If either synthesizer remap is enabled, left LINE ana- log volume is controlled through X0. With remapping the bit definitions are: LR7-LR0 Left Remapped Register. When IFM=1 and FMRM=1, writes to I18 will write the Internal FM regis- ter X6. When WTEN=1 and WTRMD=0, writes to I18 will write the Wavetable synthesis register X16. Right Line (Synthesizer) Volume (I19) Default = xxxxxxxx D7 D6 D5 D4 D3 D2 D1 D0 RLOM RLIM RLBM RLG4 RLG3 RLG2 RLG1 RLG0 RR7 RR6 RR5 RR4 RR3 RR2 RR1 RR0 This register controls either the right LINE input or is remapped to control the internal FM (X7) or external CS9236 Wavetable synthesizer (X17), or both. When no remapping occurs, the bit definitions are: RLG4-RLG0 Right LINE Volume. This register is used to control the RLINE analog in- put volume to the mixers. The least significant bit represents 1.5 dB, with 01000 = 0 dB. See Table 10. LLG4-G0 LLINE (Synthesis) LLIM LLOM LLBM To Output Mixer To Input Mixer +12 to -34.5 dB DS213PP4 CS4237B 43 |
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