Table 4. analog mixer output attenuation, Cs4205 – Cirrus Logic CS4205 User Manual
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CS4205
DS489PP4
27
5.1
Reset Register (Index 00h)
SE[4:0]
SRS 3D Stereo Enhancement. SE[4:0] = 01001, indicating this feature is present.
ID8
18-bit ADC Resolution. The ID8 bit is ‘set’, indicating this feature is present.
ID7
20-bit DAC resolution. The ID7 bit is ‘set’, indicating this feature is present.
ID5
Loudness. The ID5 bit is ‘set’, indicating this feature is present.
ID3
Simulated Stereo. The ID3 bit is ‘set’, indicating this feature is present.
ID2
Bass & Treble. The ID2 bit is ‘set’, indicating this feature is present.
ID0
Dedicated Mic PCM in Channel. The ID0 bit is ‘set’, indicating this feature is present.
Default
25ADh. The data in this register is read-only data.
Any write to this register causes a Register Reset of the audio control (Index 00h - 3Ah) and Cirrus Logic defined
(Index 5Ah - 7Ah) registers. A read from this register returns configuration information about the CS4205.
5.2
Master Volume Register (Index 02h)
Mute
Master Mute. Setting this bit mutes the LINE_OUT_L/R output signals.
ML[5:0]
Master Volume Left. These bits control the left master output volume. Each step corresponds
to 1.5 dB gain adjustment, with a total available range from 0 dB to -46.5 dB attenuation. Set-
ting the ML5 bit sets the left channel attenuation to -46.5 dB by forcing ML[4:0] to a ‘1’ state.
ML[5:0] will read back 011111 when ML5 has been ‘set’. See Table 4 for further details.
MR[5:0]
Master Volume Right. These bits control the right master output volume. Each step corre-
sponds to 1.5 dB gain adjustment, with a total available range from 0 dB to -46.5 dB attenu-
ation. Setting the MR5 bit sets the right channel attenuation to -46.5 dB by forcing MR[4:0] to
a ‘1’ state. MR[5:0] will read back 011111 when MR5 has been ‘set’. See Table 4 for further
details.
Default
8000h. This value corresponds to 0 dB attenuation and Mute ‘set’.
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
0
SE4
SE3
SE2
SE1
SE0
0
ID8
ID7
0
ID5
0
ID3
ID2
0
ID0
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Mute
0
ML5
ML4
ML3
ML2
ML1
ML0
0
0
MR5
MR4
MR3
MR2
MR1
MR0
Mx5 - Mx0
Write
Mx5 - Mx0
Read
Gain
Level
000000
000000
0 dB
000001
000001
-1.5 dB
…
…
...
011111
011111
-46.5 dB
100000
011111
-46.5 dB
...
...
...
111111
011111
-46.5 dB
Table 4. Analog Mixer Output Attenuation