CS4294-JQ CIRRUS [Cirrus Logic], CS4294-JQ Datasheet - Page 19

• Manufacturer Part Number: CS4294-JQ
• Description: SoundFusion Audio/Docking Codec 97 (AMC 97)
• Manufacturer: CIRRUS [Cirrus Logic]

6.1.3
Mute
ML[5:0]
MR[5:0]
Default
6.1.4
Mute
GN[4:0]
20dB
Default
DS326PP4
Mute
Mute
D15
D15
In Mode 1 the ALT_LINE_OUT volume is controlled by the LFE/CNT Volume (Index 36h) register
in place of Alternate Volume.
This register controls the gain level of the Microphone input source to the Input Mixer. It also con-
trols the +20 dB gain block which connects to the input volume control and to the Input Record Mux.
The gain mapping for this register is shown in Table 3.
Alternate Volume (Index 04h)
Microphone Volume (Index 0Eh)
D14
D14
Master mute for the ALT_LINE_OUT_L and the ALT_LINE_OUT_R output signals.
Master Volume control for ALT_LINE_OUT_L pin. Least significant bit represents -1.5 dB with 00000 =
0 dB. The total range is 0 dB to -94.5 dB.
Master Volume control for ALT_LINE_OUT_R pin. Least significant bit represents -1.5 dB with 00000 =
0 dB. The total range is 0 dB to -94.5 dB.
8000h, corresponding to 0 dB attenuation and mute on.
When set, mutes MIC signal.
MIC Volume Control. Least significant bit represents 1.5 dB with 01000 = 0 dB. The total range is 12 dB
to -34.5 dB.
Enables 20 dB microphone gain block.
8008h, 0 dB attenuation and Mute set.
ML[5:0]/MR[5:0]/MM[5:0]
ML5
D13
D13
GN4 - GN0
00000
00001
01000
01001
00111
11111
ML4
D12
D12
000000
000001
111111
…
…
Write
…
Table 2. Alternate Line-Out and Master Mono Attenuation
ML3
D11
D11
Table 3. Analog Mixer Input Gain Values
ML2
D10
D10
ML[5:0]/MR[5:0]/MM[5:0
ML1
D9
D9
Gain Level
ML0
+12.0 dB
+10.5 dB
000000
000001
-34.5 dB
111111
D8
+1.5 dB
D8
-1.5 dB
Read
0.0 dB
…
…
…
D7
D7
20dB
D6
D6
MR5
D5
D5
Mic Gain with 20dB = 1
Gain Level
GN4
MR4
D4
D4
-94.5 dB
-1.5 dB
+32.0 dB
0 dB
-14.5 dB
30.5 dB
21.5 dB
20.0 dB
18.5 dB
...
...
...
GN3
MR3
D3
D3
GN2
MR2
D2
D2
CS4294
GN1
MR1
D1
D1
GN0
MR0
D0
D0
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