cs4237b Cirrus Logic, Inc., cs4237b Datasheet - Page 43

• Manufacturer Part Number: cs4237b
• Description: Crystalclear Advanced Audio System With 3d Sound
• Manufacturer: Cirrus Logic, Inc.

APAR
TEST
Left Line (Synthesizer) Volume (I18)
Default = xxxxxxxx
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
LLBM
LLIM
DS213PP4
LLOM
LR7
D7
(Synthesis)
LLINE
LLIM
LR6
D6
LLBM
LR5
D5
+12 to -34.5 dB
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 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.
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.
Left LINE Input Mute. In MODE 3,
when set to 1, the Left Line Input,
LLINE, from the volume control to
LLG4-G0
LLG4
LR4
D4
LLG3
LR3
D3
LLG2
LLBM
LLOM
LR2
D2
LLIM
LLG1
LR1
D1
To Output
To Input
Mixer
Mixer
LLG0
LR0
D0
LLOM
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
Right Line (Synthesizer) Volume (I19)
Default = xxxxxxxx
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
RLOM RLIM
RR7
D7
RR6
D6
RLBM
RR5
D5
the input mixer is muted.
In MODEs 1 & 2, this bit is not avail-
able and internally forced on (muted).
Left LINE Output Mute.
When set to 1, the Left Line Input,
LLINE, from the volume control to
the output mixer is muted.
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 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.
RLG4
RR4
D4
RLG3
RR3
D3
RLG2
RR2
D2
RLG1
CS4237B
RR1
D1
RLG0
RR0
D0
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