stac9723t ETC-unknow, stac9723t Datasheet - Page 7

• Manufacturer Part Number: stac9723t
• Description: Stereo Ac 97 Codec With Multi-codec Option
• Manufacturer: ETC-unknow

SigmaTel, Inc.
1. PIN/SIGNAL DESCRIPTIONS
1.1 Digital I/O
These signals connect the STAC9721/23 to its AC'97 controller counterpart, an external crystal, multi-
codec selection and external audio amplifier.
04/07/00
SDATA_OUT
Signal Name
SDATA__IN
# denotes active low
XTL_OUT
BIT_CLK
RESET #
XTL_IN
SYNC
EAPD
CID0
CID1
Type
O
O
O
O
I
I
I
I
I
I
Table 3. Digital Signal List
Serial, time division multiplexed, AC'97 output stream
Serial, time division multiplexed, AC'97 input stream
Data Sheet
External Amplifier Power Down
48 kHz fixed rate sample sync
7
12.288 MHz serial data clock
Multi-Codec ID select – bit 0
Multi-Codec ID select – bit 1
AC'97 Master H/W Reset
24.576 MHz Crystal
24.576 MHz Crystal
Description
STAC9721
04/07/00