STAC9752A Datasheet, PDF (43/106 Pages) Integrated Device Technology – AC’97 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK

STAC9752A/9753A
AC’97 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK
PC AUDIO
When the AC‘97 Digital Controller addresses a Secondary CODEC, the Slot 0 Tag bits for Address
and Data must be 0. A non-zero, 2-bit CODEC ID in the LSBs of Slot 0 indicates a valid Read or
Write Address in Slot 1, and the Slot 1 R/W bit indicates presence or absence of valid Data in Slot 2.
Table 12. Secondary CODEC Addressing: Slot 0 tag bits
Function
Slot 0, bit 15
Slot 0, bit 14
Slot 0, bit 13 Slot 0, Bits 1-0
(Valid Frame) (Valid Slot 1 Address) (Valid Slot 2 Data) (CODEC ID)
AC‘97 Digital Controller
Secondary Read Frame N,
1
0
SDATA_OUT
0
01, 10, or 11
AC‘97 Digital Controller
Secondary Write Frame N,
1
0
SDATA_OUT
0
01, 10, or 11
AC‘97 CODEC Status Frame
N+1, SDATA_IN
1
1
1
00
5.6. Slot Assignments for Audio
Figure 19. Bi-directional AC-Link Frame with Slot assignments
SLOTS
0 1 2 3 4 5 6 7 8 9 10 11 12
SYNC
OUTGOING STREAMS
(Controller output - SDATA_OUT)
INCOMING STREAMS
(codec output - SDATA_IN)
TAG PHASE
TAG
CMD CMD
ADDR DATA
PCM
LEFT
PCM
RT
NA
PCM PCM PCM
CTR LSURR RSURR
PCM
LFE
SPDIF
SPDIF
IO
CTRL
TAG
STATUS STATUS
ADDR DATA
PCM
LEFT
PCM LINE1
RT
ADC
PCM Vendor Vendor Vendor LINE2 HSET
IO
MIC RSVD RSVD RSVD ADC ADC STATUS
DATA PHASE
Slot 12 can be used by the
AC'97 Codec if a Modem
Codec is not present.
The AC-link output slots (transmitted to the Codec) are defined as follows:
Table 13. AC-Link Output Slots Dedicated To CODEC
Slot
Name
Description
0
SDATA_OUT TAG
MSBs indicate which slots contain valid data; LSBs convey Codec ID
1 Control CMD ADDR write port
Read/write command bit plus 7-bit Codec register address
2
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
5
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
IDT™
43
AC’97 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK
STAC9752A/9753A
V 1.5 1206