307013-003 Datasheet, PDF (710/848 Pages) Intel Corporation – Intel I/O Controller Hub 7

Intel® High Definition Audio Controller Registers (D27:F0)
19.1.6
PI—Programming Interface Register
(Intel^® High Definition Audio Controller—D27:F0)
Offset:
09h
Default Value: 00h
Attribute:
Size:
RO
8 bits
19.1.7
Bit
7:0 Programming Interface — RO.
Description
SCC—Sub Class Code Register
(Intel^® High Definition Audio Controller—D27:F0)
Address Offset: 0Ah
Default Value: 03h
Attribute:
Size:
RO
8 bits
19.1.8
Bit
Sub Class Code (SCC) — RO.
7:0
03h = Audio Device
Description
BCC—Base Class Code Register
(Intel^® High Definition Audio Controller—D27:F0)
Address Offset: 0Bh
Default Value: 04h
Attribute:
Size:
RO
8 bits
19.1.9
Bit
Base Class Code (BCC) — RO.
7:0
04h = Multimedia device
Description
CLS—Cache Line Size Register
(Intel^® High Definition Audio Controller—D27:F0)
Address Offset: 0Ch
Default Value: 00h
Attribute:
Size:
R/W
8 bits
Bit
Description
7:0
Cache Line Size — R/W. Implemented as R/W register, but has no functional impact to
the Intel^® ICH7
19.1.10 LT—Latency Timer Register
(Intel^® High Definition Audio Controller—D27:F0)
Address Offset: 0Dh
Default Value: 00h
Attribute:
Size:
RO
8 bits
Bit
Description
7:0 Latency Timer — RO. Hardwired to 00
710
Intel ^® ICH7 Family Datasheet