STAC9750 Datasheet, PDF (62/73 Pages) Integrated Device Technology – VALUE-LINE TWO-CHANNEL AC’97 CODECS

STAC9750/9751
VALUE-LINE TWO-CHANNEL AC’97 CODECS
PC AUDIO
10.1. Digital I/O
These signals connect the STAC9750/9751 to its AC'97 controller counterpart, an external crystal,
multi-CODEC selection and external audio amplifier.
Table 43. Digital Connection Signals
Pin Name Pin # Type
Description
XTL_IN
2
I 24.576 MHz Crystal or External Clock Source
XTL_OUT 3 I/O 24.576 MHz Crystal or ground if external clock source connected to XTAL_IN
SDATA_OUT 5
I Serial, time division multiplexed, AC'97 input stream
BIT_CLK 6 I/O 12.288 MHz serial data clock
SDATA__IN 8 O Serial, time division multiplexed, AC'97 output stream
SYNC
10 I 48 KHz fixed rate sample sync
RESET# 11 I AC'97 Master H/W Reset
NC
31 I/O No Connect
NC
33 I/O No Connect
NC
34 I/O No Connect
GPIO0
43 I/O General Purpose I/O
GPIO1
44 I/O General Purpose I/O
CID0
45 I Multi-CODEC ID select - bit 0
CID1
46 I Multi-CODEC ID select - bit 1
EAPD
47 I/O External Amplifier Power Down
SPDIF
SPDIF digital output
48
O
Pin 48: - To Enable SPDIF, use an 1 KΩ-10 KΩ external pulldown.
To Disable SPDIF, use an 1 KΩ-10 KΩ external pullup.
Do NOT leave Pin 48 floating.
IDT™
VALUE-LINE TWO-CHANNEL AC’97 CODECS
62
STAC9750/9751
V 5.8 103106