CS4239-JQ CIRRUS [Cirrus Logic], CS4239-JQ Datasheet - Page 48

• Manufacturer Part Number: CS4239-JQ
• Manufacturer: CIRRUS [Cirrus Logic]

Reserved (X0)
Default = xxxxxxxx
rbc
Reserved (X1)
Default = xxxxxxxx
rbc
MIC Volume (X2)
Default = 01011111
MG4-MG0
MBST
LMOM
LMIM
48
LMIM LMOM MBST
D7
D7
D7
rbc
rbc
D6
D6
D6
rbc
rbc
D5
D5
D5
rbc
rbc
Reserved, backwards compatible.
Reserved, backwards compatible.
Microphone Gain. The least signifi-
cant bit represents 1.5 dB, where
01111 = 0 dB and 11110 = -22.5 dB.
When all bits are 1, the Mic is muted
with one exception. If MBST = 1
when going from 11110 to 11111, the
Mic volume does not change. The
attenuation steps are shown in
Table 9.
Microphone 20 dB boost.
When set to 1, the MIC input is
gained by 20 dB.
Microphone Left Output Mixer Mute.
When set to 1, the signal to the left
channel output mixer is muted.
Microphone Left Input Mixer Mute.
When set to 1, the signal to the left
channel input mixer is muted.
MG4
D4
D4
D4
rbc
rbc
MG3
D3
D3
D3
rbc
rbc
MG2
D2
D2
D2
rbc
rbc
MG1
D1
D1
D1
rbc
rbc
MG0
D0
D0
D0
rbc
rbc
Right Channel MIC (X3)
Default = 01011111
MG4-MG0
MBST
RMOM
RMIM
Synthesis and Input Mixer Control (X4)
Default = e00exxxx
IFM
LIS1-LIS0
RMIM RMOM MBST
MIMR LIS1
D7
D7
D6
D6
CrystalClear Portable ISA Audio System
LIS0
D5
D5
Microphone gain.
The least significant bit represents
1.5 dB, with 01111 = 0 dB. These
are the same bits as in X2.
See Table 9.
When set to 1, the MIC input is
gained by 20 dB. This is the same
bit as in X2.
Microphone Right Output Mixer Mute.
When set to 1, the signal to the right
channel output mixer is muted.
Microphone Right Input Mixer Mute.
When set to 1, the signal to the right
channel input mixer is muted.
Internal FM enable. When set to 1,
the internal FM synthesis engine is
enabled. 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.
00 - 0 dB
01 - -6 dB
10 - -12 dB
11 - -18 dB
Microphone 20 dB boost.
IFM
D4
MG4
D4
TM
D3
rbc
MG3
D3
MG2
D2
D2
rbc
MG1
D1
CS4239
DS253PP2
D1
res
MG0
D0
D0
res