W83971D Datasheet, PDF (22/58 Pages) Winbond – AC97 AUDIO CODEC

Preliminary W83971D
6.14 Record Gain Control Register (Index 1Ch)
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default
Reg#
1Ch Mute
GL3 GL2 GL1 GL0
GR3 GR2 GR1 GR0 8000h
6.14.1 Mute Record Mute Control
"1" : Mute enabled
"0" : Mute disabled
6.14.2 GL[3:0] Record Gain Control (Left Channel)
These four bits select the gain applied to the LEFT channel recording source. The gain is
programmable from 0dB to 22.5dB in 1.5dB increments, providing a total of 16 programmable levels.
The gain is set at 0dB when GL[3:0] = 0h.
6.14.3 GR[3:0] Record Gain Control (Right Channel)
These four bits select the gain applied to the RIGHT channel recording source. The gain is
programmable from 0dB to 22.5dB in 1.5dB increments, providing a total of 16 programmable levels.
6.15 General Purpose Register (Index 20h)
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default
Reg#
20h
3D
MIX MS LPBK
0000h
6.15.1 3D Stereo Enhancement
"1" : Enabled
"0" : Disabled
6.15.2 MIX Mono Output Mode
"1" : Mic Output
"0" : Mono mix output
6.15.3 MS Microphone Select
"1" : Microphone 2
"0" : Microphone 1
6.15.4 LPBK Loopback Mode
"1" : DAC/ADC Loopback enabled
"0" : DAC/ADC Loopback disabled
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