cs4239 Cirrus Logic, Inc., cs4239 Datasheet - Page 44

• Manufacturer Part Number: cs4239
• Description: Crystalclear? Ortable Isa Audio System Logic
• Manufacturer: Cirrus Logic, Inc.

Capture Data Format (I28)
Default = x0x0xxxx
S/M
16B
Right Master Output Volume (I29)
Default = 00100011
When Hardware Volume is enabled, VCEN in C8 or
X24 is set, this register will change based on external
buttons.
ROG4-ROG0
44
ROM
D7
D7
rbc
ROS1
D6
16B
D6
ROS0
D5
D5
rbc
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
selects between 8-bit unsigned and
16-bit signed data for capture. The
capture data format can be different
than the playback data format. MCE
(R0) or CMCE (I16) must be set to
modify this register. See Changing
Audio Data Formats section for
more details.
0 - 8-bit unsigned data
1 - 16-bit signed data
Right Output, ROUT, Master Gain.
ROG0 is the least significant bit and
represents -2 dB, with 00011 = 0 dB.
The span is nominally +6 dB to
-56 dB. See Table 9.
ROG4 ROG3 ROG2 ROG1 ROG0
D4
S/M
D4
D3
D3
res
D2
D2
res
D1
D1
res
D0
D0
res
ROS1,0
ROM
Capture Upper Base (I30)
Default = 00000000
CUB7-CUB0
Capture Lower Base (I31)
Default = 00000000
CLB7-CLB0
CUB7
CLB7
D7
D7
CUB6
CLB6
D6
D6
CrystalClear Portable ISA Audio System
CUB5
CLB5
D5
D5
select and attenuation into the right
output Master Gain stage, ROG4-0.
00 - -16 dB
01 - 0 dB
10 - -8 dB
11 - -24 dB
Right Output Mute. When set to 1,
the right output, ROUT, is muted.
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.
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.
Right Output Mixer Select. These bits
Lower Base Bits: This register is the
CUB4
CLB4
D4
D4
TM
CUB3
CLB3
D3
D3
CUB2
CLB2
D2
D2
CUB1
CLB1
D1
D1
CS4239
DS253PP2
CUB0
CLB0
D0
D0