STAC9752A Datasheet, PDF (54/106 Pages) Integrated Device Technology – AC’97 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK

STAC9752A/9753A
AC’97 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK
PC AUDIO
Bit(s) Reset Value
12:5
00h
4:1
0
0
0
Name
F[7:0]
PV(3:0)
Reserved
Description
The Beep frequency is the result of dividing the 48KHz clock by 4 times
the number specified in F[7:0] allowing tones from 47Hz to 12KHz.
A value of 00h in bits F[7:0] disables internal PC BEEP generation and
enables external PC BEEP input if available.
PCBEEP Volume Control
0000 = 0dB attenuation
0001 = 3dB attenuation
.....
1111 = 45dB attenuation
Bit not used, should read back 0
7.1.6.
Phone Volume (Index 0Ch)
Default: 8008h.
D15
D14
D13
Mute
D7
D6
D5
Reserved
Bit(s) Reset Value
15
1
Name
Mute
14:5
0
Reserved
4:0
0
GN<4:0>
D12
D4
GN4
D11
Reserved
D3
GN3
D10
D2
GN2
Description
0 = No mute
1 = Mute phone
Bit not used, should read back 0
Phone Volume Control
00000 = 12dB gain
00001 = 10.5dB gain
.....
01000 = 0dB gain
.....
11111 = -34.5dB gain
D9
D1
GN1
D8
D0
GN0
7.1.7.
Stereo or Mic Volume (Index 0Eh)
To enable Stereo Mic, Register 78h (unlocked), bit D6 must be enabled.
In Stereo mode, the left and right volume is controlled by GN4:GN0.
Default: 8008h.
D15
Mute
D7
Reserved
D14
D6
BOOSTEN
D13
D5
Reserved
D12
D4
GN4
D11
Reserved
D3
GN3
D10
D2
GN2
Bit(s) Reset Value
15
1
14:7
0
Name
Mute
Reserved
Description
0 = no mute
1 = mute phone
Bit not used, should read back 0
D9
D1
GN1
D8
D0
GN0
IDT™
54
AC’97 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK
STAC9752A/9753A
V 1.5 1206