STAC9752A Datasheet, PDF (80/106 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
7.4.8.
Revision Code (6Ch)
To access Register 6Ch, Page 00h must be selected in Register 24h.
Default: xxxxh
D15
D14
D13
D12
D11
D10
D9
D8
MINORREV
D7
D6
D5
D4
D3
D2
D1
D0
MAJORREV
Bit(s) Reset Value Name
Description
15:8
00h
MINORREV
Minor Revision ID. These bits are read only and will be updated based on minor
device changes which will not require software changes.
7:0
xx
MAJORREV
Major Revision ID. These bits are read only and will be updated based on major
device changes.
7.4.9.
Analog Special (6Eh)
To access Register 6Eh, Page 00h must be selected in Register 24h.
Default: 1000h
D15
D7
RSVD
D14
Reserved
D6
MUTEFIX
DISABLE
D13
D5
ADCSLT1
D12
D11
AC97MIX
D4
D3
D10
D9
Reserved
D2
D1
ADCSLT0 RSVD MIC GAIN VAL SPLYOVR EN
D8
D0
SPLYOVR VAL
Bit(s) Reset Value
15:13
0
12
1
11:7
0
6
0
Name
Reserved
AC97MIX
Reserved
MUTEFIX
DISABLE
Description
Bits not used, should read back 0
0 = mixer record contains a mix of all mono and stereo analog input signals,
not the DAC (ALL ANALOG mode)
1 = mixer record contains a mix of all mono and stereo analog input signals
plus the DAC signal (AC97 mode)
This bit only has an effect when either Stereo Mix or Mono Mix is selected as
the record source in Reg. 1Ah.
The “ALL” mode is useful in conjunction with the POP BYPASS mode (Reg.
20h;D15) to record all analog sources, perform further processing in the
digital domain, including combining with other PCM data, and routing through
the DACs directly to Line Out, Headphone Out, or Mono Out.
A Stereo Mix recording will be affected by the setting of the 3D Effects bit
(Reg. 20h;D13)
Bits not used, should read back 0
0 = MUTE FIX Enabled
1 = MUTE FIX Disabled
When this bit is zero, and either channel is set to -46.5dB attenuation, 1Fh,
then that channel is fully muted. When this bit is one, then operation is per
AC’97 specification.
IDT™
80
AC’97 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK
STAC9752A/9753A
V 1.5 1206