CS4237B Datasheet, PDF (47/114 Pages) Cirrus Logic – CrystalClear Advanced Audio System with 3D Sound

CS4237B
right channels. The mono input pro-
vides mix for the "beeper" function in
most personal computers.
0 - no mute
1 - muted
Reserved (I27)
Default = xxxxxxxx
D7 D6 D5 D4 D3 D2 D1 D0
res res res res res res res res
res
Reserved. Must write 0. Could read
as 0 or 1.
Capture Data Format (I28)
Default = 0000xxxx
D7 D6 D5 D4 D3 D2 D1 D0
FMT1 FMT0 C/L S/M res res res res
res
Reserved. Must write 0. Could read
as 0 or 1.
S/M
Stereo/Mono Select: This bit deter-
mines how the capture audio data
stream is formatted. Selecting stereo
will result with alternating samples
representing left and right audio
channels. Selecting mono only cap-
tures data from the left audio
channel. MCE (R0) or CMCE (I16)
must be set to modify S/M. See
Changing Audio Data Formats sec-
tion for more details.
0 - Mono
1 - Stereo
C/L, FMT1, FMT0 set the capture data format in
MODEs 2 and 3. See Table 11 or
register I8 for the bit settings and
data formats. The capture data for-
mat can be different than the
playback data format; however, the
sample frequency must be the same
and is set in I8. MCE (R0) or CMCE
(I16) must be set to modify this regis-
ter. See Changing Audio Data
Formats section for more details.
Reserved (I29)
Default = xxxxxxxx
D7 D6 D5 D4 D3 D2 D1 D0
res res res res res res res res
res
Reserved. Must write 0. Could read
as 0 or 1.
Capture Upper Base (I30)
Default = 00000000
D7 D6 D5 D4 D3 D2 D1 D0
CUB7 CUB6 CUB5 CUB4 CUB3 CUB2 CUB1 CUB0
CUB7-CUB0
Capture Upper Base: This register is
the upper byte which represents the
8 most significant bits of the 16-bit
Capture Base register. Reads from
this this register returns the same
value that was written.
Capture Lower Base (I31)
Default = 00000000
D7 D6 D5 D4 D3 D2 D1 D0
CLB7 CLB6 CLB5 CLB4 CLB3 CLB2 CLB1 CLB0
CLB7-CLB0
Lower Base Bits: This register is the
lower byte which represents the 8
least significant bits of the 16-bit
Capture Base register. Reads from
this register returns the same value
which was written.
DS213PP4
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