CS4298 Datasheet, PDF (26/52 Pages) Cirrus Logic – SoundFusion Audio/Modem Codec 97 (AMC 97)

CS4298
6.1.7 Record Gain (Index 1Ch)
D15 D14 D13 D12 D11 D10 D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Mute
GL3 GL2 GL1 GL0
GR3 GR2 GR1 GR0
Mute
GL[3:0]
GR[3:0]
Default
When set, mutes the input to the ADCs.
Left ADC gain. Least significant bit represents +1.5 dB with 0000 = 0 dB.
The total range is 0 dB to +22.5 dB.
Right ADC gain. Least significant bit represents +1.5 dB with 0000 = 0 dB.
The total range is 0 dB to +22.5 dB.
8000h, 0 dB gain with Mute on.
6.1.8 Record Gain Microphone (Index 1Eh)
D15 D14 D13 D12 D11 D10 D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Mute
GM3 GM2 GM1 GM0
Mute
When set, mutes the input to MADC2.
GM[3:0] Dedicated Microphone gain. Least significant bit represents +1.5 dB with 0000 = 0 dB.
The total range is 0 dB to +22.5 dB.
Default 8000h, 0 dB gain with Mute on.
This register is only available in Mode 2.
6.1.9 General Purpose (Index 20h)
D15 D14 D13 D12 D11 D10 D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
POP
3D
MS LPBK
POP
3D
MS
LPBK
Default
PCM Output Path. By default, the PCM output is mixed prior to the 3D enhancement. When set, the
PCM output is mixed after the 3D enhancement.
3D Enable. If set, enables the CrystalClear 3D stereo enhancement.
Microphone Select. Determines which of the two MIC inputs are passed to the mixer. When set, MIC2
input is selected; when clear MIC1 is selected.
Loopback. If set, enables Analog ADC/DAC Loopback Mode.
0000h.
6.1.10 3D Control (Index 22h)
D15 D14 D13 D12 D11 D10 D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
S3 S2 S1 S0
S[3:0]
Spacial Enhancement Depth. Spacial Enhancement is enabled by the 3D bit in the General Purpose
(Index 20h) register.
0000 - No spacial enhancement.
1111 - Full spacial enhancement.
Default 0000h, no spacial enhancement added.
The Spacial Enhancements is not available on the ALT_LINE output when the codec is in Mode 3
or EAM is set. See the AC Mode Control (Index 5Eh) register for more detail.
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