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STAC9708 Datasheet(PDF) 23 Page - List of Unclassifed Manufacturers

Part # STAC9708
Description  Multi-Channel AC97 Codec With Multi-Codec Option
PDF  56 Pages
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Manufacturer  ETC [List of Unclassifed Manufacturers]
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STAC9708 Datasheet(HTML) 23 Page - List of Unclassifed Manufacturers

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SigmaTel, Inc.
Preliminary
STAC9708/11
23
10/02/98
Warm Reset - a warm reset will re-activate the AC-Link without altering the current STAC9708/11
register values. A warm reset is signaled by driving SYNC high for a minimum of 1us in the absence of
BIT_CLK.
Note: Within normal audio frames, SYNC is a synchronous input. However, in the absence
of BIT_CLK, SYNC is treated as an asynchronous input used in the generation of a warm
reset to the STAC9708/11.
4. STAC9708/11 MIXER
The STAC9708/11 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. STAC9708/11 Mixer Functional Diagram
-6 dB
-6 dB
vol
mute
PCM out
D/A
Phone
MIC1
MIC2
LINE IN
LINE OUT
CD
Video
AUX
Analog Audio
Sources
MONO OUT
PCM IN
20dB
Master
Volume
Mono
Volume
A/D
A/D
Master
Input
Volume
Σ
Σ
M
U
X
M
U
X
vol
vol
vol
vol
vol
vol
vol
mute
mute
mute
mute
mute
mute
mute
KEY
Mono Analog
Stereo Analog
Digital
DAC OUT
vol
mute
PCM out
Surround
D/A
DAC
Volume
3D
3D
PC_BEEP
Σ



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