STAC9752/9753
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING
IDT™
52 STAC9752/9753
REV 3.3 1206
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING
8.1.7. Mic Volume (Index 0Eh)
Default: 8008h.
8.1.8. LineIn Volume (Index 10h)
Default: 8808h.
D15 D14 D13 D12 D11 D10 D9 D8
Mute RESERVED
D7 D6 D5 D4 D3 D2 D1 D0
RESERVED BOOSTEN RESERVED GN4 GN3 GN2 GN1 GN0
Bit(s) Reset Value Name Description
15 1 Mute
0 = No mute
1 = Mute phone
14:7 0 RESERVED Bit not used, should read back 0
6 0 BOOSTEN
Works with MICGAINVAL (Register 6Eh, Bit D2)
BOOSTEN MICGAINVAL = Microphone Gain Boost
0 0 = 0 dB
0 1 = 10 dB
1 0 = 20 dB
1 1 = 30 dB
5 0 RESERVED
4:0 0 GN<4:0>
Phone Volume Control
00000 = 12dB gain
00001 = 10.5dB gain
.....
01000 = 0dB gain
.....
11111 = -34.5dB gain
D15 D14 D13 D12 D11 D10 D9 D8
Mute RESERVED GL4 GL3 GL2 GL1 GR0
D7 D6 D5 D4 D3 D2 D1 D0
RESERVED GR4 GR3 GR2 GR1 GR0
Bit(s) Reset Value Name Description
15 1 Mute
0 = No mute
1 = Mute linein
14:13 0 RESERVED Bit not used, should read back 0
12:8 0 GL<4:0>
Left LineIn Volume Control
00000 = 12dB gain
00001 = 10.5dB gain
.....
01000 = 0dB gain
.....
11111 = -34.5dB gain
7:5 0 RESERVED Bit not used, should read back 0
4:0 0 GR<4:0>
Right LineIn Volume Control
00000 = 12dB gain
00001 = 10.5dB gain
.....
01000 = 0dB gain
.....
11111 = -34.5dB gain
