NH82801DBSL8DE 869490 Intel, NH82801DBSL8DE 869490 Datasheet - Page 479
NH82801DBSL8DE 869490
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NH82801DBSL8DE 869490
Description
Manufacturer
Intel
Datasheet
1.NH82801DBSL8DE_869490.pdf
(587 pages)
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14.2
Intel
®
Table 14-2. Intel
82801DB ICH4 Datasheet
AC ’97 Audio I/O Space (D31:F5)
The AC ’97 I/O space includes Native Audio Bus Master Registers and Native Mixer Registers.
For the ICH4, 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.
Primary Offset
(Codec ID =00)
®
0Ch
1Ch
2Ch
00h
02h
04h
06h
08h
0Ah
0Eh
10h
12h
14h
16h
18h
1Ah
1Eh
20h
22h
24h
26h
28h
2Ah
2Eh
30h
32h
34h
36h
ICH4 Audio Mixer Register Configuration (Sheet 1 of 2)
Secondary Offset
(Codec ID =01)
ACh
8Ch
9Ch
AAh
AEh
B0h
B2h
80h
82h
84h
86h
88h
8Ah
8Eh
90h
92h
94h
96h
98h
9Ah
9Eh
A0h
A2h
A4h
A6h
A8h
B4h
B6h
(Codec ID =10)
Tertiary Offset
10Ch
12Ch
10Ah
10Eh
11Ah
11Ch
11Eh
12Ah
12Eh
100h
102h
104h
106h
108h
110h
112h
114h
116h
118h
120h
122h
124h
126h
128h
130h
132h
134h
136h
AC ’97 Audio Controller Registers (D31:F5)
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
NAMBAR Exposed Registers
(D31:F5)
479
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