NH82801HEM S LB9B Intel, NH82801HEM S LB9B Datasheet - Page 687
NH82801HEM S LB9B
Manufacturer Part Number
NH82801HEM S LB9B
Description
Manufacturer
Intel
Datasheet
1.NH82801HEM_S_LB9B.pdf
(890 pages)
Specifications of NH82801HEM S LB9B
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Intel
17.2.34
17.2.35
Intel
®
®
ICH8 Family Datasheet
High Definition Audio Controller Registers (D27:F0)
DPLBASE—DMA Position Lower Base Address Register
(Intel
Memory Address:HDBAR + 70h
Default Value:
DPUBASE—DMA Position Upper Base Address Register
(Intel
Memory Address:HDBAR + 74h
Default Value:
31:7
31:0
6:1
Bit
Bit
0
DMA Position Lower Base Address — R/W. This field provides the lower 32 bits of
the DMA Position Buffer Base Address. This register field must not be written when any
DMA engine is running or the DMA transfer may be corrupted. This same address is
used by the Flush Control and must be programmed with a valid value before the Flush
Control bit (HDBAR+08h:bit 1) is set.
DMA Position Lower Base Unimplemented bits — RO. Hardwired to 0 to force the
128-byte buffer alignment for cache line write optimizations.
DMA Position Buffer Enable — R/W.
0 = Disable.
1 = Enable. Controller will write the DMA positions of each of the DMA engines to the
DMA Position Upper Base Address — R/W. This field provides the upper 32 bits of
the DMA Position Buffer Base Address. This register field must not be written when any
DMA engine is running or the DMA transfer may be corrupted.
®
®
High Definition Audio Controller—D27:F0)
High Definition Audio Controller—D27:F0)
buffer in the main memory periodically (typically, once per frame). Software can
use this value to know what data in memory is valid data.
00000000h
00000000h
Description
Description
Attribute:
Size:
Attribute:
Size:
R/W, RO
32 bits
R/W
32 bits
687
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