CS4237B Datasheet, PDF (37/114 Pages) Cirrus Logic – CrystalClear Advanced Audio System with 3D Sound

CS4237B
Left Auxiliary #2 Volume (I4)
Default = 11x01000
D7 D6 D5 D4 D3 D2 D1 D0
LX2OM LX2IM res LX2G4 LX2G3 LX2G2 LX2G1 LX2G0
LX2G4-LX2G0 Left Auxiliary #2, LAUX2, Mix Gain.
The least significant bit represents
1.5 dB, with 01000 = 0 dB.
See Table 10.
res
Reserved. Must write 0.
LX2IM
Left Auxiliary #2 Mute. In MODE 3,
when set to 1, the left Auxiliary #2 in-
put, LAUX2, to the input mixer
through the gain stage, is muted.
In MODEs 1 & 2, this bit is not avail-
able and internally forced on (muted).
LX2OM
LAUX2
(Line In)
Left Auxiliary #2 Mute. When set to 1,
the left Auxiliary #2 input, LAUX2, to
the output mixer through the gain
stage, is muted.
LX2G4-G0
+12 to -34.5 dB
To Output
LX2OM ^Mixer
To Input
LX2IM ^Mixer
Right Auxiliary #2 Volume (I5)
Default = 11x01000
D7 D6 D5 D4 D3 D2 D1 D0
RX2OM RX2IM res RX2G4 RX2G3 RX2G2 RX2G1 RX2G0
RX2G4-RX2G0 Right Auxiliary #2, RAUX2, Mix Gain.
The least significant bit represents
1.5 dB, with 01000 = 0 dB.
See Table 10.
res
Reserved. Must write 0. Could read
as 0 or 1.
RX2IM
Right Auxiliary #2 Mute. In MODE 3,
when set, the right Auxiliary #2 in-
put, RAUX2, to the input mixer
through the gain stage, is muted.
In MODEs 1 & 2, this bit is not avail-
able and internally forced on (muted).
RX2OM
RAUX2
(Line In)
Right Auxiliary #2 Mute. When set to
1, the right Auxiliary #2 input,
RAUX2, to the output mixer through
the gain stage, is muted.
RX2G4-G0
+12 to -34.5 dB
To Output
RX2OM ^Mixer
To Input
RX2IM ^Mixer
Left DAC (PC Wave) Volume (I6)
Default = 10000000
D7 D6 D5 D4
LDOM LDG6 LDG5 LDG4
LPM res LPA5 LPA4
D3
LDG3
LPA3
D2
LDG2
LPA2
D1
LDG1
LPA1
D0
LDG0
LPA0
If both IFM (X4 or Global Config. byte) and WTEN
(C8 or Global Config. byte) are cleared, this register
is the master digital audio volume for the left channel
with the following bit definitions:
LDG6-LDG0
Left DAC Master Volume. The least
significant bit represents 1.5 dB, with
0000000 = 0 dB. The total range is
+12 to -94.5 dB. See Table 12.
LDOM
Left DAC Master Mute. When set, the
left DAC to the output mixer is
muted.
If IFM or WTEN is set, this register controls the left
channel volume for data coming from the ISA bus
only (and X14 is the left channel digital audio master
volume) with the following bit descriptions.
LPA5-LPA0
Left PC Wave Attenuation. The least
significant bit represents -1.5 dB,
with 000000 = 0 dB. The total range
is 0 to -94.5 dB. See Table 6.
res
Reserved. Must write 0. Could read
as 0 or 1.
LPM
Left PC Wave Mute. When set, the
left PCM input to the digital mixer
summer will be muted.
DS213PP4
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