CS4237B Datasheet, PDF (36/114 Pages) Cirrus Logic – CrystalClear Advanced Audio System with 3D Sound

CS4237B
Right ADC Input Control (I1)
Default = 000x0000
D7 D6 D5 D4 D3 D2 D1 D0
RSS1 RSS0 RMGE res RAG3 RAG2 RAG1 RAG0
RAG3-RAG0 Right ADC Gain. The least significant
bit represents +1.5 dB, with
0000 = 0 dB. See Table 7.
res
Reserved. Must write 0. Could read
as 0 or 1.
RMGE
This bit has no function in MODE 3.
In MODEs 1 & 2 it controls the
20 dB gain boost for the right MIC in-
put to the ADCs.
RSS1-RSS0
Right output loopback. In MODE 3
setting these bits to 11 enables the
right output loopback into the input
mixer. Other bit combinations dis-
able the loopback.
In MODEs 1 & 2, the input mixer is
used as a mux. where these bits se-
lect the right ADC input source.
00 - RLINE
01 - RAUX1
10 - RMIC
11 - Right Output Mixer Loopback
Left Auxiliary #1 Volume (I2)
Default = 11101000
D7 D6 D5 D4 D3 D2 D1 D0
LX1OM LX1IM LX1BM LX1G4 LX1G3 LX1G2 LX1G1 LX1G0
LX1G4-LX1G0 Left Auxiliary #1, LAUX1, Mix Gain.
The least significant bit represents
1.5 dB, with 01000 = 0 dB.
See Table 10.
LX1BM
Left Auxiliary #1 Bypass Mute. In
MODE 3, when set, the left Auxiliary
#1 input, LAUX1, (bypassing the
gain) 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.
LX1IM
36
Left Auxiliary #1 Mute. In MODE 3,
when set, the left Auxiliary #1 input,
LAUX1, to the input mixer through
LX1OM
LAUX1
(Line In)
the gain stage, is muted.
In MODEs 1 & 2, this bit is not avail-
able and internally forced on (muted).
Left Auxiliary #1 Mute. When set to 1,
the left Auxiliary #1 input, LAUX1, to
the output mixer through the gain
stage, is muted.
LX1G4-G0
+12 to -34.5 dB
To Output
LX1OM ^Mixer
To Input
LX1IM ^Mixer
LX1BM
Right Auxiliary #1 Volume (I3)
Default = 11101000
D7 D6 D5 D4 D3 D2 D1 D0
RX1OM RX1IM RX1BM RX1G4 RX1G3 RX1G2 RX1G1 RX1G0
RX1G4-RX1G0 Right Auxiliary #1, RAUX1, Mix Gain.
The least significant bit represents
1.5 dB, with 01000 = 0 dB.
See Table 10.
RX1BM
Right Auxiliary #1 Bypass Mute. In
MODE 3, when set, the right Auxil-
iary #1 input, RAUX1, (bypassing
the gain) to the input mixer is muted.
In MODEs 1 & 2, this bit is not avail-
able and is internally controlled by
RSS1,0 in I1.
RX1IM
Right Auxiliary #1 Mute. When set to 1,
the right Auxiliary #1 input, RAUX1,
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).
RX1OM
RAUX1
(Line In)
Right Auxiliary #1 Mute. When set to 1,
the right Auxiliary #1 input, RAUX1,
to the output mixer through the gain
stage, is muted.
RX1G4-G0
+12 to -34.5 dB
To Output
RX1OM ^Mixer
To Input
RX1IM ^Mixer
RX1BM
DS213PP4