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CS4237B Datasheet(PDF) 53 Page - Cirrus Logic

Part # CS4237B
Description  CrystalClear Advanced Audio System with 3D Sound
Download  114 Pages
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Manufacturer  CIRRUS [Cirrus Logic]
Direct Link  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

CS4237B Datasheet(HTML) 53 Page - Cirrus Logic

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master digital audio volume. This bit
can be set through the Hardware
Configuration data in the EEPROM.
LIS1-LIS0
Left Input Mixer Summer Attenuator.
This attenuates the inputs to the left
input mixer to enable overload pro-
tection when multiple input sources
are utilized. The least significant bit
represents 6 dB of attenuation,
where 00 yields 0 dB of attenuation.
See Table 8.
MIMR
Mono Input Mute to the Right Output
mixer. When set to 1, the MIN signal
to the right output mixer is muted.
Right Input Mixer Control (X5)
Default = 000xxxxx
D7
D6
D5
D4
D3
D2
D1
D0
MOMR
RIS1
RIS0
res
res
res
res
res
res
Reserved. Must write 0. Could be
read as 0 or 1.
RIS1-RIS0
Right Input Mixer Summer Attenuator.
This attenuates the inputs to the
right input mixer to enable overload
protection when multiple input
sources are utilized. The least signifi-
cant bit represents 6 dB of
attenuation, where 00 yields 0 dB of
attenuation. See Table 8.
MOMR
Mono Output Mute from the Right
Line Out, ROUT, to the mono output
mixer. When set to 1, the signal to
the mono output mixer from the
Right Line Out is muted.
Left FM Synthesis Volume (X6)
Default = 1x000000
D7
D6
D5
D4
D3
D2
D1
D0
LFMM
res
LFMA5 LFMA4 LFMA3 LFMA2 LFMA1 LFMA0
NOTE: This FM volume register can also be control-
led through I18 when IFM = 1 and FMRM = 1.
LFMA5-LFMA0 Left Internal FM Synthesis Volume.
The least significant bit represents
1.5 dB, with 000000 = 0 dB.
See Table 6.
res
Reserved. Must write 0. Could read
as 0 or 1.
LFMM
Left FM mute. When set to 1, the
left internal FM input to the digital
mixer is muted.
Right FM Synthesis Volume (X7)
Default = 1x000000
D7
D6
D5
D4
D3
D2
D1
D0
RFMM
res
RFMA5 RFMA4 RFMA3 RFMA2 RFMA1 RFMA0
NOTE: This FM volume register can also be control-
led through I19 when IFM = 1 and FMRM = 1.
RFMA5-RFMA0 Right Internal FM Synthesis Volume.
The least significant bit represents
1.5 dB, with 000000 = 0 dB.
See Table 6.
res
Reserved. Must write 0. Could read
as 0 or 1.
RFMM
Right FM mute. When set to 1, the
right internal FM input to the digital
mixer is muted.
Left DSP Serial Port Volume (X8)
Default = 0x000000
D7
D6
D5
D4
D3
D2
D1
D0
LSPM
res
LSPA5
LSPA4
LSPA3 LSPA2
LSPA1 LSPA0
LSPA4-LSPA0 Left DSP Serial Port Attenuation.
The least significant bit represents
1.5 dB, with 000000 = 0 dB.
See Table 6.
res
Reserved. Must write 0. Could read
as 0 or 1.
LFMA5-A0
LFMM
To Digital Mixer
Summer
0 to -94.5 dB
Internal FM
Synthesizer
RFMA5-A0
RFMM
To Digital Mixer
Summer
0 to -94.5 dB
Internal FM
Synthesizer
DS213PP4
CS4237B
53


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