stac9752xxtaeb2xr Integrated Device Technology, stac9752xxtaeb2xr Datasheet - Page 87

• Manufacturer Part Number: stac9752xxtaeb2xr
• Description: Two-channel, 20-bit, Ac ?97 2.3 Codecs With Microphone And Jack Sensing
• Manufacturer: Integrated Device Technology

IDT™
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING
STAC9752/9753
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING
12.2. Analog I/O
These signals connect the STAC9752/9753 to analog sources and sinks, including microphones and
speakers.
Note: * Unused input pins should be tied together and connected to ground through a capacitor (0.1 µF
Note:
LINE_OUT_R
LINE_OUT_L
MONO_OUT
HP_OUT_R
LINE_IN_R
HP_OUT_L
HP_COMM
LINE_IN_L
Pin Name
PC_BEEP
CD_GND
VIDEO_R
VIDEO_L
PHONE
AUX_R
AUX_L
CD_R
CD_L
MIC1
MIC2
suggested), except the MIC inputs which should have a separate capacitor to ground.
about 2.5V. The name of the pin in the AC97 specification is CD_GND, and this has confused many
designers. It should not have any DC path to GND. Connecting the CD_GND signal directly to ground
will change the internal bias of the entire CODEC, and cause serious distortion. If there is no analog CD
input, then this pin can be No-Connect.
†
The CD_GND signal is an AC signal return for the two CD input channels. It is normally biased at
†
Pin #
12
13
14
15
16
17
18
19
20
21
22
23
24
35
36
37
39
40
41
Table 33. Analog Connection Signals
Type
I*
I*
I*
I*
I*
I*
I*
I*
I*
I*
I*
I*
I*
O
O
O
O
O
O
87
PC Speaker beep pass-through
From telephony subsystem speakerphone
Aux Left Channel
Aux Right Channel
Video Audio Left Channel
Video Audio Right Channel
CD Audio Left Channel
CD Audio analog signal return (Do NOT ground. See note.
CD Audio Right Channel
Desktop Microphone Input
Second Microphone Input
Line In Left Channel
Line In Right Channel
Line Out Left Channel
Line Out Right Channel
To telephony subsystem speakerphone
Headphone Out Left Channel
Headphone Ground Return
Headphone Out Right Channel
STAC9752/9753
Description
REV 3.3 1206
†
)