307013-003 Datasheet, PDF (623/848 Pages) Intel Corporation – Intel I/O Controller Hub 7

AC ’97 Audio Controller Registers (D30:F2) (Desktop and Mobile Only)
16.1.6
PI—Programming Interface Register (Audio—D30:F2)
Offset:
09h
Default Value: 00h
Lockable:
No
Attribute:
Size:
Power Well:
RO
8 bits
Core
16.1.7
Bit
7:0 Programming Interface — RO.
Description
SCC—Sub Class Code Register (Audio—D30:F2)
Address Offset: 0Ah
Default Value: 01h
Lockable:
No
Attribute:
Size:
Power Well:
RO
8 bits
Core
16.1.8
Bit
Sub Class Code (SCC) — RO.
7:0
01h = Audio Device
Description
BCC—Base Class Code Register (Audio—D30:F2)
Address Offset: 0Bh
Default Value: 04h
Lockable:
No
Attribute:
Size:
Power Well:
RO
8 bits
Core
16.1.9
Bit
Base Class Code (BCC) — RO.
7:0
04h = Multimedia device
Description
HEADTYP—Header Type Register (Audio—D30:F2)
Address Offset: 0Eh
Default Value: 00h
Lockable:
No
Attribute:
Size:
Power Well:
RO
8 bits
Core
Bit
Description
7:0 Header Type — RO. Hardwired to 00h.
Intel ^® ICH7 Family Datasheet
623