307013-003 Datasheet, PDF (631/848 Pages) Intel Corporation – Intel I/O Controller Hub 7

AC ’97 Audio Controller Registers (D30:F2) (Desktop and Mobile Only)
16.2 AC ’97 Audio I/O Space (D30:F2)
The AC ’97 I/O space includes Native Audio Bus Master registers and Native Mixer
registers. For the ICH7, the offsets are important as they will determine bits 1:0 of the
TAG field (codec ID).
Audio Mixer I/O space can be accessed as a 16-bit field only since the data packet
length on
AC-link is a word. Any S/W access to the codec will be done as a 16-bit access starting
from the first active byte. In case no byte enables are active, the access will be done at
the first word of the qWord that contains the address of this request.
Table 16-2. Intel^® ICH7 Audio Mixer Register Configuration (Sheet 1 of 2)
Primary Offset Secondary Offset Tertiary Offset
(Codec ID =00) (Codec ID =01) (Codec ID =10)
00h
80h
02h
82h
04h
84h
06h
86h
100h
102h
104h
106h
08h
88h
0Ah
8Ah
108h
10Ah
0Ch
8Ch
0Eh
8Eh
10h
90h
10Ch
10Eh
110h
12h
92h
14h
94h
16h
96h
18h
98h
1Ah
9Ah
1Ch
9Ch
1Eh
9Eh
112h
114h
116h
118h
11Ah
11Ch
11Eh
20h
A0h
22h
A2h
120h
122h
24h
A4h
26h
A6h
28h
A8h
124h
126h
128h
2Ah
AAh
2Ch
ACh
12Ah
12Ch
2Eh
AEh
30h
B0h
32h
B2h
34h
B4h
36h
B6h
12Eh
130h
132h
134h
136h
38h
B8h
3Ah
BAh
138h
13Ah
3Ch–56h
58h
BC–D6h
D8h
13C–156h
158h
NAMBAR Exposed Registers
(D30:F2)
Reset
Master Volume
Aux Out Volume
Mono Volume
Master Tone (R & L)
PC_BEEP Volume
Phone Volume
Mic Volume
Line In Volume
CD Volume
Video Volume
Aux In Volume
PCM Out Volume
Record Select
Record Gain
Record Gain Mic
General Purpose
3D Control
AC ’97 RESERVED
Powerdown Ctrl/Stat
Extended Audio
Extended Audio Ctrl/Stat
PCM Front DAC Rate
PCM Surround DAC Rate
PCM LFE DAC Rate
PCM LR ADC Rate
MIC ADC Rate
6Ch Vol: C, LFE
6Ch Vol: L, R Surround
S/PDIF Control
Intel RESERVED
AC ’97 Reserved
Intel ^® ICH7 Family Datasheet
631