STAC9766XXTAEC1X IDT, Integrated Device Technology Inc, STAC9766XXTAEC1X Datasheet - Page 27

• Manufacturer Part Number: STAC9766XXTAEC1X
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of STAC9766XXTAEC1X

• Single Supply Voltage (typ): 3.3/5V
• Single Supply Voltage (min): 3.135/4.75V
• Single Supply Voltage (max): 3.465/5.25V
• Package Type: TQFP
• Lead Free Status / RoHS Status: Compliant

5. AC-LINK DIGITAL INTERFACE
IDT™
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING
STAC9766/9767
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING
5.1.
Overview
AC-link is the 5 pin digital serial interface that links AC‘97 CODEC to Controller. The AC-link protocol
is a bi-directional, fixed clock rate, serial digital stream. AC-link handles multiple input and output
PCM audio streams, as well as control register accesses, employing a time division multiplexed
(TDM) scheme that divides each audio frame into 12 outgoing and 12 incoming data streams, each
with 20-bit sample resolution.
The STAC9766/9767 DACs, ADCs and SPDIF can be assigned to slots 3&4, 6&9, 7&8 or 10&11.
OUTGOING STREAMS
6, 7, 8, 9 PCM Center, Surround L&R, LFE 20-bit PCM data for Center, Surround L&R, LFE channels
(Controller output - SDATA_OUT)
INCOMING STREAMS
10-11
10-12
Slot
3, 4
10
11
12
12
0
1
2
5
(codec output - SDATA_IN)
Figure 14. Bi-directional AC-link Frame with Slot Assignments
TAG PHASE
SDATA_OUT TAG
Control CMD ADDR write port
Control DATA write port
PCM L&R DAC playback
Modem Line 1 DAC
Modem Line 2 DAC
Modem handset DAC
Modem IO control
CODEC IRQ
SPDIF Out
Double rate audio
SLOTS
SYNC
Table 4. AC-link Output Slots (Transmitted from the Controller)
Name
TAG
TAG
0
STATUS
ADDR
ADDR
CMD
1
STATUS
DATA
DATA
CMD
27
2
MSBs indicate which slots contain valid data; LSBs convey
CODEC ID
Read/write command bit plus 7-bit CODEC register address
16-bit command register write data
20-bit PCM data for Left and Right channels
16-bit modem data for modem Line 1 output
16-bit modem data for modem Line 2 output
16-bit modem data for modem Handset output
GPIO write port for modem Control
Can be used by CODEC if a modem CODEC is not present.
Optional AC-link bandwidth for SPDIF output
Optional AC-link bandwidth for 88.26KHz or 96KHz on L, C, R
channels
LEFT
LEFT
PCM
PCM
3
PCM
PCM
4
RT
RT
LINE1
ADC
5
NA
DATA PHASE
PCM
PCM
CTR
MIC
6
STAC9766/9767
LSURR
Vendor
Description
RSVD
PCM
7
Slot 12 can be used by the
AC'97 Codec if a Modem
Codec is not present.
RSURR
Vendor
RSVD
PCM
8
Vendor
RSVD
PCM
LFE
9
SPDIF
LINE2
10
ADC
SPDIF
HSET
11
ADC
PC AUDIO
STATUS
V 7.4 12/06
CTRL
12
IO
IO