CS4298 Datasheet, PDF (25/52 Pages) Cirrus Logic – SoundFusion Audio/Modem Codec 97 (AMC 97)

CS4298
6.1.5 Stereo Analog Mixer Input Gain (Index’s 10h - 18h)
D15 D14 D13 D12 D11 D10 D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Mute
GL4 GL3 GL2 GL1 GL0
GR4 GR3 GR2 GR1 GR0
Mute
When set mutes the respective input. Setting this bit mutes both right and left inputs.
GL[4:0]
Left Volume Control. Least significant bit represents 1.5 dB with 01000 = 0 dB. The total range is 12 dB
to -34.5 dB. See Table 3.
GR[4:0]
Right Volume Control. Least significant bit represents 1.5 dB with 01000 = 0 dB. The total range is 12
dB to -34.5 dB. See Table 3.
Default
8808h, 0 dB gain with Mute enabled.
These registers control the gain levels of the analog input sources to the Input Mixer. The analog in-
puts associated with registers 10h-18h are found in Table 4.
Register Index
10h
12h
14h
16h
18h
Function
Line IN Volume
CD Volume
Video Volume
Aux Volume
PCM Out Volume
Table 4. Stereo Volume Register Index
6.1.6 Input Mux Select (Index 1Ah)
D15 D14 D13 D12 D11 D10 D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
SL2 SL1 SL0
SR2 SR1 SR0
SL[2:0] Left Channel ADC input source select.
SR[2:0] Right Channel ADC input source select.
Default 0000h, MIC inputs selected for both channels.
When capturing PCM data, this register controls the input MUX for the ADCs. Table 5 below lists
the possible values for each input.
Sx2 - Sx0
0
1
2
3
4
5
6
7
Record Source
MIC
CD Input
Video Input
AUX Input
Line Input
Stereo Mix
Mono Mix
Not Available
Table 5. Input Mux Selection
DS315PP2
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