82801FB Datasheet, PDF (627/786 Pages) Intel Corporation – Intel I/O Controller Hub 6 (ICH6) Family

Intel^® High Definition Audio Controller Registers (D27:F0)
18 Intel^® High Definition Audio
Controller Registers (D27:F0)
The Intel High Definition Audio controller resides in PCI Device 27, Function 0 on bus 0. This
function contains a set of DMA engines that are used to move samples of digitally encoded data
between system memory and external codecs.
Note:
All registers in this function (including memory-mapped registers) must be addressable in byte,
word, and D-word quantities. The software must always make register accesses on natural
boundaries (i.e. D-word accesses must be on D-word boundaries; word accesses on word
boundaries, etc.) In addition, the memory-mapped register space must not be accessed with the
LOCK semantic exclusive-access mechanism. If software attempts exclusive-access mechanisms
to the Intel High Definition Audio memory-mapped space, the results are undefined.
Note:
Users interested in providing feedback on the Intel High Definition Audio specification or planning
to implement the Intel High Definition Audio specification into a future product will need to
execute the Intel High Definition Audio Specification Developer’s Agreement. For more
information, contact [e-mail].
18.1 Intel^® High Definition Audio PCI Configuration
Space
(Intel^® High Definition Audio— D27:F0)
Note: Address locations that are not shown should be treated as Reserved.
Table 18-1. Intel^® High Definition Audio PCI Register Address Map
(Intel^® High Definition Audio D27:F0) (Sheet 1 of 2)
Offset
00–01h
02–03h
04–05h
06–07h
Mnemonic
VID
DID
PCICMD
PCISTS
Register Name
Vendor Identification
Device Identification
PCI Command
PCI Status
08h
RID
Revision Identification
09h
PI
Programming Interface
0Ah
SCC
Sub Class Code
0Bh
BCC
Base Class Code
0Ch
CLS
Cache Line Size
0Dh
LT
Latency Timer
0Eh
HEADTYP Header Type
Default
8086h
2668h
0000h
0010h
See register
description.
00h
03h
04h
00h
00h
00h
Access
RO
RO
R/W, RO
R/WC, RO
RO
RO
RO
RO
R/W
RO
RO
10–13h
HDBARL Intel High Definition Audio Lower Base Address
(Memory)
00000004h
R/W, RO
Intel^® I/O Controller Hub 6 (ICH6) Family Datasheet
627