STAC9766 datasheet(39/97 Pages) IDT

39 / 97 page

STAC9766/9767

TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING

PC AUDIO

IDT™

STAC9766/9767

V 7.4 12/06

TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING

5.6.

Slot Assignments for Audio

Figure 19. Bi-directional AC-link Frame with Slot assignments

Note: The DAC & ADC can be assigned to slots 3&4, 6&9, 7&8, or 10&11.

The AC-link input slots (transmitted to the Codec) are defined as follows:

The AC-link input slots (transmitted from the Codec) are defined as follows:

Table 13. AC-link Input Slots To CODEC

Slot

Name

Description

SDATA_OUT TAG

MSBs indicate which slots contain valid data; LSBs convey Codec ID

Control CMD ADDR write port Read/write command bit plus 7-bit Codec register address

Control DATA write port

16-bit command register write data

3,4

PCM L & R DAC playback

16, 18, or 20-bit PCM data for left and right channels

Modem Line 1 DAC

16-bit modem data for modem line 1 output

6, 7,

8, 9

PCM Center, Rear, LFE

16, 18, or 20-bit PCM data for Center, L & R Rear, LFE channels

Modem Line 2 DAC

16-bit modem data for modem line 2 output

Modem handset DAC

16-bit modem data for modem handset output

Modem IO control

GPIO write port for modem control

10-12 Double rate audio

Optional AC-link bandwidth for 88.2 or 96 kHz on L, C, R channels

Table 14. AC-link Input Slots From CODEC

Slot

Name

Description

SDATA_IN TAG

MSBs indicate which slots contain valid data

STATUS ADDR read port

MSBs echo register address; LSBs indicate which slots request data

STATUS DATA read port

16-bit command register read data

3,4

PCM L & R ADC record

16-bit PCM data from left and right inputs

Modem Line 1 ADC

16-bit modem data from modem line 1 input

Dedicated Microphone ADC

16-bit PCM data from optional 3rd ADC input

PCM

MIC

Vendor

RSVD

Vendor

RSVD

LINE2

ADC

HSET

ADC

Vendor

RSVD

STATUS

ADDR

OUTGOING STREAMS

(Controller output - SDATA_OUT)

INCOMING STREAMS

(codec output - SDATA_IN)

SYNC

TAG PHASE

DATA PHASE

PCM

LEFT

CMD

ADDR

PCM

LSURR

PCM

LFE

SPDIF

TAG

CMD

DATA

PCM

CTR

PCM

RSURR

SPDIF

CTRL

PCM

LEFT

LINE1

ADC

TAG

STATUS

DATA

PCM

STATUS

SLOTS

Slot 12 can be used by the

AC'97 Codec if a Modem

Codec is not present.

STAC9766 Datasheet(PDF) 39 Page - Integrated Device Technology

STAC9766 Datasheet(HTML) 39 Page - Integrated Device Technology

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