AD1986A Analog Devices, AD1986A Datasheet - Page 28

• Manufacturer Part Number: AD1986A
• Description: HD Audio SoundMAX Codec
• Manufacturer: Analog Devices

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AD1986A
OMS [2:0]
101
101
101
101
101
110
110
110
110
110
111
111
111
111
111
1
2
3
4
5
ADC VOLUME (REGISTER 0x1C)
This register controls the mute and gain of the ADC record path. The volume register contains four bits, generating 16 volume steps of
1.5 dB each for a range of 0 dB to 22.5 dB.
Reg
0x1C
Table 86.
Register
L/RV [4:0]
(Left/Right
Volume)
L/RM
(Left/Right Mute)
x
To select the alternate pins as a microphone source, see the OMS [2:0] bit (Register 0x74).
To mix the left/right MIC channels, see MMIX bit (Register 0x7A).
For dual MIC recording, see 2CMIC bit (Register 0x76) to enable simultaneous recording into L/R channels.
To swap left/right MIC channels, see the MS bit (Register 0x20) for MIC_1/2 selection.
The MONO_OUT pin can be connected to the left channel of the microphone selector and is affected by these bits.
4
Name
ADC Volume
1
MMIX
0
0
0
0
1
0
0
0
0
1
0
0
0
0
1
Function
Controls the left/right channel gains of this input to the analog mixer from 0 dB to 22.5 dB. The least significant bit
represents 1.5 dB.
L/RM
0
0
0
1
Mutes the left/right channels independently.
Reserved.
2
D15
LM
2CMIC
0
0
1
1
x
0
0
1
1
x
0
0
1
1
x
D14
x
3
MS
0
1
0
1
x
0
1
0
1
x
0
1
0
1
x
D13
x
4
L/RV [3:0]
0000
1000
1111
xxxx
Left Channel
MIC_1 + LINE_IN left (mixed)
MIC_2 + LINE_IN right (mixed)
LINE_IN left + CENTER (mixed)
LINE_IN right + LFE (mixed)
MIC_1 + LINE_IN left + CENTER (mixed)
MIC_2 + LINE_IN right + LFE (mixed)
D12
x
D11
LV3
MIC_1 + MIC_2 + LINE_IN left + LINE_IN right + CENTER + LFE (mixed)
5
D10
LV2
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LINE_IN left + LINE_IN right + CENTER + LFE (mixed)
D9
LV1
MIC_1 + MIC_2 + LINE_IN left + LINE right (mixed)
Function
0 dB
12.0 dB gain
22.5 dB gain
Muted
MIC_1 + LINE_IN left + CENTER (mixed)
D8
LV0
MIC_2 + LINE_IN right + LFE (mixed)
MIC_2 + LINE_IN right (mixed)
LINE_IN left + CENTER (mixed)
MIC_1 + LINE_IN left (mixed)
LINE_IN right + LFE (mixed)
D7
RM
D6
x
x
D5
Right Channel
MIC_2 + LINE_IN right (mixed)
MIC_1 + LINE_IN left (mixed)
LINE_IN right + LFE (mixed)
LINE_IN left + CENTER (mixed)
MIC_1 + LINE_IN left + CENTER (mixed)
MIC_2 + LINE_IN right + LFE (mixed)
D4
x
D3
RV3
RV2
D2
Default
Default
Default: muted (0x1)
Default: 0
D1
RV1
D0
RV0
Default
0x8080