Audio Codec '97

AC ‘97 Component Specification Revision 2.3 Rev 1.0
45
• Headphone (Register 00h, bit 4)
• Loudness or bass boost (Register 00h, bit 5)
• 18-bit DAC resolution (Register 00h, bit 6)
• 20-bit DAC resolution (Register 00h, bit 7)
• 18-bit ADC resolution (Register 00h, bit 8)
• 20-bit ADC resolution (Register 00h, bit 9)
5.6 Slot Assignments for Audio
SYNC
Slot #
0 1 2 3 4 5 6 7 8 9 10 11 12
SDATA_OUT
SDATA_IN
CMD
ADDR
CMD
DATA
PCM
L FRONT
PCM PCM
CENTER
PCM
L SURR
PCM
R SURR
PCM
LFE
LINE 2
DAC
HSET
DAC
TAG
STATUS
ADDR
STATUS
DATA
PCM
LEFT
PCM
RIGHT
IO
STATUS
RSRVD RSRVD
LINE 2
A
DC
HSET
A
DC
TAG
IO
CTRL
LINE 1
A
DC
SLOTREQ 3-12
RSRVD
LINE 1
DAC
PCM
MIC
PCM L
( n+1)
PCM R
(n+1)
PCM C
(n+1)
Codec ID
R FRONT
Figure 18. AC-link Slot Definitions
The AC-link output slots dedicated to audio are defined as follows:
Slot Name Description
3 PCM L DAC playback 16, 18, or 20-bit PCM data for left channel
4 PCM R DAC playback 16, 18, or 20-bit PCM data for right channel
6 PCM Center 16, 18, or 20-bit PCM data for Center channel
7 PCM L Surround 16, 18, or 20-bit PCM data for L Surround channel
8 PCM R Surround 16, 18, or 20-bit PCM data for R Surround channel
9 PCM LFE 16, 18, or 20-bit PCM data for LFE channel
10 Double rate audio Optional AC-link bandwidth for 88.2 or 96 kHz on PCM L
channel
11 Double rate audio Optional AC-link bandwidth for 88.2 or 96 kHz on PCM R
channel
12 Double rate audio Optional AC-link bandwidth for 88.2 or 96 kHz on PCM C
channel
The AC-link input slots dedicated to audio are defined as follows:
Slot Name Description
3 PCM L ADC record 16, 18, or 20-bit PCM data from left input
4 PCM R ADC record 16, 18, or 20-bit PCM data from right inputs
6 Dedicated Microphone ADC 16, 18, or 20-bit PCM data from optional 3rd ADC input
7 Vendor reserved vendor specific (enhanced input for docking, array mic, etc)
8 Vendor reserved vendor specific (enhanced input for docking, array mic, etc)
9 Vendor reserved vendor specific (enhanced input for docking, array mic, etc)
12 Audio Interrupt (or ModemGPIO) Provides optional interrupt capability for
Audio Codec (not usable when a modem is present)