CS4237B Datasheet, PDF (43/114 Pages) Cirrus Logic – CrystalClear Advanced Audio System with 3D Sound

CS4237B
APAR
TEST
ADPCM Playback Accumulator Reset.
While set, the Playback ADPCM
accumulator is held at zero. Used
when pausing a playback stream.
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
LLOM LLIM LLBM LLG4
LR7 LR6 LR5 LR4
D3
LLG3
LR3
D2
LLG2
LR2
D1
LLG1
LR1
D0
LLG0
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
LLINE
(Synthesis)
LLG4-G0
+12 to -34.5 dB
To Output
LLOM ^Mixer
To Input
LLIM ^Mixer
LLBM
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
RLOM RLIM RLBM RLG4
RR7 RR6 RR5 RR4
D3
RLG3
RR3
D2
RLG2
RR2
D1
RLG1
RR1
D0
RLG0
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.
DS213PP4
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