NH82801GHM S L8YR Intel, NH82801GHM S L8YR Datasheet - Page 745
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NH82801GHM S L8YR
Manufacturer Part Number
NH82801GHM S L8YR
Description
Manufacturer
Intel
Datasheet
1.NH82801GHM_S_L8YR.pdf
(848 pages)
Specifications of NH82801GHM S L8YR
Lead Free Status / RoHS Status
Compliant
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Intel® High Definition Audio Controller Registers (D27:F0)
19.2.25
19.2.26
Intel
®
ICH7 Family Datasheet
RIRBUBASE—RIRB Upper Base Address Register
(Intel
Memory Address:HDBAR + 54h
Default Value:
RIRBWP—RIRB Write Pointer Register
(Intel
Memory Address:HDBAR + 58h
Default Value:
31:0
14:8
7:0
Bit
Bit
15
RIRB Upper Base Address — R/W. This field is the upper 32 bits of the address of the
Response Input Ring Buffer. This register field must not be written when the DMA
engine is running or the DMA transfer may be corrupted.
RIRB Write Pointer Reset — R/W. Software writes a 1 to this bit to reset the RIRB
Write Pointer to 0. The RIRB DMA engine must be stopped prior to resetting the Write
Pointer or else DMA transfer may be corrupted.
This bit is always read as 0.
Reserved.
RIRB Write Pointer (RIRBWP) — RO. This field is the indicates the last valid RIRB entry
written by the DMA controller. Software reads this field to determine how many
responses it can read from the RIRB. The value read indicates the RIRB Write Pointer
offset in 2 DWord RIRB entry units (since each RIRB entry is 2 DWords long). Supports
up to 256 RIRB entries (256 x 8 B = 2 KB). This register field may be written when the
DMA engine is running.
®
®
High Definition Audio Controller—D27:F0)
High Definition Audio Controller—D27:F0)
00000000h
0000h
Description
Description
Attribute:
Size:
Attribute:
Size:
R/W
32 bits
R/W, RO
16 bits
745
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