IDTSTAC9752AXNAED1X IDT, Integrated Device Technology Inc, IDTSTAC9752AXNAED1X Datasheet - Page 31

• Manufacturer Part Number: IDTSTAC9752AXNAED1X
• Description: IC CODEC AC'97 MIC/JACK 32-QFN
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Audio Codec '97r

Specifications of IDTSTAC9752AXNAED1X

• Resolution (bits): 20 b
• Number Of Adcs / Dacs: 2 / 2
• Sigma Delta: Yes
• S/n Ratio, Adcs / Dacs (db) Typ: 85 / 92
• Voltage - Supply, Analog: 3.14 V ~ 3.47 V; 4.75 V ~ 5.25 V
• Voltage - Supply, Digital: 3.14 V ~ 3.47 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 32-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: STAC9752AXNAED1X

5. AC-LINK DIGITAL INTERFACE
IDT™
AC’97 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK
STAC9752A/9753A
AC’97 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK
5.1.
Overview
AC-Link is the 5-pin digital serial interface that links AC‘97 CODEC to the 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 multi-
plexed (TDM) scheme that divides each audio frame into 12 outgoing and 12 incoming data streams,
each with 20-bit sample resolution.
The STAC9752A/9753A 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
Slot
3, 4
10
11
0
1
2
5
(codec output - SDATA_IN)
Figure 14. Bi-directional AC-Link Frame with Slot assignments
TAG PHASE
Control CMD ADDR write port
SLOTS
PCM L&R DAC playback
SYNC
Control DATA write port
Modem handset DAC
Modem Line 1 DAC
Modem Line 2 DAC
SDATA_OUT TAG
Table 4. AC-Link Output Slots (transmitted from the Controller)
Name
TAG
TAG
0
STATUS
ADDR
ADDR
CMD
1
STATUS
DATA
CMD
DATA
31
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
LEFT
LEFT
PCM
PCM
3
PCM
PCM
4
RT
RT
LINE1
ADC
5
NA
DATA PHASE
PCM
PCM
CTR
MIC
6
STAC9752A/9753A
LSURR
Vendor
RSVD
PCM
Description
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
12
CTRL
IO
IO
V 1.5 1206