NH82801FBM S L89K Intel, NH82801FBM S L89K Datasheet - Page 611
NH82801FBM S L89K
Manufacturer Part Number
NH82801FBM S L89K
Description
Manufacturer
Intel
Datasheet
1.NH82801FBM_S_L89K.pdf
(786 pages)
Specifications of NH82801FBM S L89K
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17.1.9
17.1.10
Intel
®
I/O Controller Hub 6 (ICH6) Family Datasheet
HEADTYP—Header Type Register (Modem—D30:F3)
Address Offset:
Default Value:
Lockable:
MMBAR—Modem Mixer Base Address Register
(Modem—D30:F3)
Address Offset:
Default Value:
The Native PCI Mode Modem uses PCI Base Address register #1 to request a contiguous block of
I/O space that is to be used for the Modem Mixer software interface. The mixer requires 256 bytes
of I/O space. All accesses to the mixer registers are forwarded over the AC-link to the codec where
the registers reside.
In the case of the split codec implementation accesses to the different codecs are differentiated by
the controller by using address offsets 00h
for the secondary codec.
31:16
15:8
Bit
7:0
Bit
7:1
0
Header Type — RO.
Hardwired to 0’s.
Base Address — R/W. These bits are used in the I/O space decode of the Modem interface
registers. The number of upper bits that a device actually implements depends on how much of the
address space the device will respond to. For the AC ‘97 Modem, the upper 16 bits are hardwired to
0, while bits 15:8 are programmable. This configuration yields a maximum I/O block size of
256 bytes for this base address.
Reserved. Read as 0
Resource Type Indicator (RTE) — RO. Hardwired to 1indicating a request for I/O space.
0Eh
00h
No
10
00000001h
–
13h
–
7Fh for the primary codec and address offsets 80h
AC ’97 Modem Controller Registers (D30:F3)
Description
Description
Attribute:
Size:
Power Well:
Attribute:
Size:
RO
8 bits
Core
R/W, RO
32 bits
–
FEh
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