cs4237b Cirrus Logic, Inc., cs4237b Datasheet - Page 53

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

LIS1-LIS0
MIMR
Right Input Mixer Control (X5)
Default = 000xxxxx
res
RIS1-RIS0
MOMR
Left FM Synthesis Volume (X6)
Default = 1x000000
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.
DS213PP4
LFMM
MOMR
D7
D7
D6
res
RIS1
D6
LFMA5 LFMA4 LFMA3 LFMA2 LFMA1 LFMA0
D5
RIS0
D5
master digital audio volume. This bit
can be set through the Hardware
Configuration data in the EEPROM.
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.
Mono Input Mute to the Right Output
mixer. When set to 1, the MIN signal
to the right output mixer is muted.
Reserved. Must write 0. Could be
read as 0 or 1.
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.
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.
The least significant bit represents
1.5 dB, with 000000 = 0 dB.
See Table 6.
D4
D4
res
D3
D3
res
D2
D2
res
D1
D1
res
D0
D0
res
res
LFMM
Right FM Synthesis Volume (X7)
Default = 1x000000
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.
res
RFMM
Left DSP Serial Port Volume (X8)
Default = 0x000000
LSPA4-LSPA0 Left DSP Serial Port Attenuation.
res
RFMM
Synthesizer
Synthesizer
Internal FM
Internal FM
LSPM
D7
D7
D6
res
D6
res LSPA5 LSPA4 LSPA3 LSPA2 LSPA1 LSPA0
RFMA5 RFMA4 RFMA3 RFMA2 RFMA1 RFMA0
D5
D5
Reserved. Must write 0. Could read
as 0 or 1.
Left FM mute. When set to 1, the
left internal FM input to the digital
mixer is muted.
The least significant bit represents
1.5 dB, with 000000 = 0 dB.
See Table 6.
Reserved. Must write 0. Could read
as 0 or 1.
Right FM mute. When set to 1, the
right internal FM input to the digital
mixer is muted.
The least significant bit represents
1.5 dB, with 000000 = 0 dB.
See Table 6.
Reserved. Must write 0. Could read
as 0 or 1.
0 to -94.5 dB
0 to -94.5 dB
LFMA5-A0
RFMA5-A0
D4
D4
D3
D3
RFMM
LFMM
D2
D2
To Digital Mixer
Summer
To Digital Mixer
Summer
CS4237B
D1
D1
D0
D0
53