STAC9758 Datasheet, PDF (59/119 Pages) Integrated Device Technology – HIGH-PERFORMANCE 6-CHANNEL AC’97 2.3 CODEC WITH UNIVERSAL JACKS

STAC9758/9759
HIGH-PERFORMANCE 6-CHANNEL AC’97 2.3 CODEC WITH UNIVERSAL JACKS™
PC AUDIO
8.2.10. CD Volume (12h)
Default: 8808h.
D15
Mute
D7
RMute
D14
D13
RESERVED
D6
D5
RESERVED
D12
GL4
D4
GR4
D11
GL3
D3
GR3
D10
GL2
D2
GR2
D9
GL1
D1
GR1
D8
GR0
D0
GR0
Bit(s) Reset Value R/W Name
Description
0 = no mute
1 = mute
15
1
RW
Mute
The channels to be affected are determined by the SPLITMUTE bit
(Reg 72, Page 0, D6).
If SPLITMUTE = 0 - both Left and Right channels are muted
If SPLITMUTE = 1 - only the Left Channel is muted
14:13
0
RO RESERVED Bit not used, should read back 0
Left CD Volume Control
00h = 00000b = +12.0 dB gain
01h = 00001b = +10.5 dB gain
12:8
08
RW GL<4:0> .....
08h = 01000b = 0 dB - unity gain (default)
.....
1Fh = 11111b = -34.5 dB attenuation
Mutes Right Channel independent of Left Channel
0 = unmute
1 = muted
7
0
RW RMute The SPLITMUTE bit (Reg 72, Page 0, D6) must be set to 1 in order for the
RMute bit to have an effect on the sound.
The RMute bit is R/W. The RMute bit may be written and read regardless
of the state of the SPLITMUTE bit.
6:5
0
RO RESERVED Bit not used, should read back 0
Right CD Volume Control
00h = 00000b = +12.0 dB gain
01h = 00001b = +10.5 dB gain
4:0
08
RW GR<4:0> .....
08h = 01000b = 0 dB - unity gain (default)
.....
1Fh = 11111b = -34.5 dB attenuation
IDT™
59
HIGH-PERFORMANCE 6-CHANNEL AC’97 2.3 CODEC WITH UNIVERSAL JACKS™
STAC9758/9759
V 1.2 1206