STAC9704 Datasheet, PDF (22/49 Pages) Hynix Semiconductor – Multimedia Audio Codec for AC97

SigmaTel, Inc.
STAC9704/7
4. STAC9704/7 MIXER
The STAC9704/7 mixer is designed to the AC’97 specification to manage the playback and record of all digital
and analog audio sources in the PC environment. These include:
• System Audio: digital PCM input and output for business, games and multimedia
• CD/DVD: analog CD/DVD-ROM Redbook audio with internal connections to Codec mixer
• Mono microphone: choice of desktop mic, with programmable boost and gain
• Speakerphone: use of system mic and speakers for telephone, DSVD, and video conferencing
• Video: TV tuner or video capture card with internal connections to Codec mixer
• AUX/synth: analog FM or wavetable synthesizer, or other internal source
Figure 11. STAC9704/7 Mixer Functional Diagram
PCM out
D/A
PC_Beep
Phone
Analog Audio
Sources
MIC1
MIC2
20dB
LINE IN
CD
Video
KEY
Mono Analog
AUX
Stereo Analog
Digital
vol mute
vol mute
vol mute
vol mute
Σ
vol mute
vol mute
vol mute
vol mute
-6dB _Σ
3D _LNLVL
Volume
-6dB
Σ
3D Master
Volume
Mono
Volume
Master _A/D
Input
Volume ^A/D
LNLVL_OUT
LINE_OUT
MONO_OUT
PCM IN
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10/02/98