STAC9752 Datasheet, PDF (85/95 Pages) Integrated Device Technology – 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. PIN DESCRIPTION
MONO_OUT 37
AVdd2 38
HP_OUT_L 39
HP_COMM 40
HP_OUT_R 41
AVss2 42
GPIO0 43
GPIO1 44
CID0 45
CID1 46
EAPD 47
SPDIF 48
48-Pin TQFP
24 LINE_IN_R
23 LINE_IN_L
22 MIC2
21 MIC1
20 CD_R
19 CD_GND
18 CD_L
17 VIDEO_R
16 VIDEO_L
15 AUX_R
14 AUX_L
13 PHONE
Figure 24. Pin Description Drawing
Pin 48: To Enable SPDIF, use a 1 KΩ-10 KΩ external pulldown. To Disable SPDIF, use a 1 KΩ- 1 0 KΩ
external pullup. Do NOT leave Pin 48 floating.
The CD_GND signal is an AC signal return for the two CD input channels. It is normally biased at about
2.5V. The name of the pin in the AC97 specification is CD_GND, and this has confused many design-
ers. 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.
IDT™
85
STAC9752/9753
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING
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