82NM10 Datasheet, PDF (572/671 Pages) Intel Corporation – Intel® NM10 Family Express Chipset

Intel HD Audio Controller Registers (D27:F0)
18 Intel HD Audio Controller
Registers (D27:F0)
Note:
Note:
18.1
Note:
The Intel HD 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.
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.
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 HD Audio Specification Developer’s Agreement.
For more information, contact [e-mail].
Intel HD Audio PCI Configuration Space
(Intel HD Audio— D27:F0)
Address locations that are not shown should be treated as Reserved.
Table 18-146.Intel HD Audio PCI Register Address Map
(Intel HD Audio D27:F0) (Sheet 1 of 3)
Offset
00h–01h
02h–03h
Mnemonic
Register Name
VID
Vendor Identification
DID
Device Identification
04h–05h
06h–07h
08h
PCICMD
PCISTS
RID
PCI Command
PCI Status
Revision Identification
09h
0Ah
0Bh
0Ch
0Dh
0Eh
10h–13h
PI
SCC
BCC
CLS
LT
HEADTYP
HDBARL
Programming Interface
Sub Class Code
Base Class Code
Cache Line Size
Latency Timer
Header Type
Intel HD Audio Lower Base Address
(Memory)
Default
8086h
See register
description.
0000h
0010h
See register
description.
00h
03h
04h
00h
00h
00h
00000004h
Access
RO
RO
R/W, RO
R/WC, RO
RO
RO
RO
RO
R/W
RO
RO
R/W, RO
572
Datasheet