STAC9766 Datasheet, PDF (49/97 Pages) Integrated Device Technology – TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING

STAC9766/9767
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING
PC AUDIO
Bit(s) Reset Value
12:8
0
7:6
0
5
0
4:0
0
Name
ML<4:0>
RESERVED
MR5
MR<4:0>
Description
Left Headphone Volume Control
00000 = 0dB attenuation
00001 = 1.5dB attenuation
.....
11111 = 46.5dB attenuation
Bits not used, should read back 0
0 = Headphone attenuation is a function of bits 4-0
1 = forces register bits 4-0 to be 11111
Always reads back 0
Right Channel Headphone Volume Control
00000 = 0dB attenuation
00001 = 1.5dB attenuation
.....
11111 = 46.5dB attenuation
8.1.4. Master Volume MONO (06h)
Default: 8000h
D15
D14
Mute
D7
D6
RESERVED
Bit(s) Reset Value
15
1
14:6
0
5
0
4:0
0
D13
D5
MM5
Name
Mute
RESERVED
MM5
MM<4:0>
D12
D4
MM4
D11
RESERVED
D3
MM3
D10
D2
MM2
Description
0 = No mute
1 = Mute mono
Bit not used, should read back 0
0 = Mono attenuation is a function of bits 4-0
1 = Forces register bits 4-0 to be 11111
Always reads back 0
Mono Volume Control
00000 = 0dB attenuation
00001 = 1.5dB attenuation
.....
11111 = 46.5dB attenuation
D9
D1
MM1
D8
D0
MM0
IDT™
49
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING
STAC9766/9767
V 7.4 12/06