cs4237b Cirrus Logic, Inc., cs4237b Datasheet - Page 36

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

Right ADC Input Control (I1)
Default = 000x0000
RAG3-RAG0
res
RMGE
RSS1-RSS0
Left Auxiliary #1 Volume (I2)
Default = 11101000
LX1G4-LX1G0 Left Auxiliary #1, LAUX1, Mix Gain.
LX1BM
LX1IM
36
LX1OM LX1IM LX1BM LX1G4 LX1G3 LX1G2 LX1G1 LX1G0
RSS1
D7
D7
RSS0
D6
D6
RMGE
D5
D5
Right ADC Gain. The least significant
bit represents +1.5 dB, with
0000 = 0 dB. See Table 7.
Reserved. Must write 0. Could read
as 0 or 1.
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.
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
The least significant bit represents
1.5 dB, with 01000 = 0 dB.
See Table 10.
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.
Left Auxiliary #1 Mute. In MODE 3,
when set, the left Auxiliary #1 input,
LAUX1, to the input mixer through
Right output loopback. In MODE 3
D4
res
D4
RAG3
D3
D3
RAG2
D2
D2
RAG1
D1
D1
RAG0
D0
D0
LX1OM
Right Auxiliary #1 Volume (I3)
Default = 11101000
RX1G4-RX1G0 Right Auxiliary #1, RAUX1, Mix Gain.
RX1BM
RX1IM
RX1OM
RX1OM RX1IM RX1BM RX1G4 RX1G3 RX1G2 RX1G1 RX1G0
D7
(Line In)
(Line In)
RAUX1
LAUX1
D6
D5
+12 to -34.5 dB
+12 to -34.5 dB
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.
The least significant bit represents
1.5 dB, with 01000 = 0 dB.
See Table 10.
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.
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).
Right Auxiliary #1 Mute. When set to 1,
the right Auxiliary #1 input, RAUX1,
to the output mixer through the gain
stage, is muted.
LX1G4-G0
RX1G4-G0
D4
D3
RX1OM
LX1OM
RX1IM
RX1BM
LX1IM
LX1BM
D2
To Output
To Output
To Input
To Input
CS4237B
D1
Mixer
Mixer
Mixer
Mixer
DS213PP4
D0