NH82801FBM S L89K Intel, NH82801FBM S L89K Datasheet - Page 661

• Manufacturer Part Number: NH82801FBM S L89K
• Manufacturer: Intel

Specifications of NH82801FBM S L89K

• Lead Free Status / RoHS Status: Compliant

18.2.17
18.2.18
Intel
®
I/O Controller Hub 6 (ICH6) Family Datasheet
CORBRP—CORB Read Pointer Register
(Intel
Memory Address: HDBAR + 4Ah
Default Value:
CORBCTL—CORB Control Register
(Intel
Memory Address: HDBAR + 4Ch
Default Value:
14:8
Bit
7:0
Bit
7:2
15
1
0
®
®
CORB Read Pointer Reset — R/W. Software writes a 1 to this bit to reset the CORB Read Pointer
to 0 and clear any residual prefetched commands in the CORB hardware buffer within the Intel High
Definition Audio controller. The hardware will physically update this bit to 1 when the CORB Pointer
reset is complete. Software must read a 1 to verify that the reset completed correctly. Software must
clear this bit back to 0 and read back the 0 to verify that the clear completed correctly. The CORB
DMA engine must be stopped prior to resetting the Read Pointer or else DMA transfer may be
corrupted.
Reserved.
CORB Read Pointer — R/W. Software reads this field to determine how many commands it can
write to the CORB without over-running. The value read indicates the CORB Read Pointer offset in
DWord granularity. The offset entry read from this field has been successfully fetched by the DMA
controller and may be over-written by software. Supports 256 CORB entries (256x4B = 1KB). This
register field may be ready while the DMA engine is running.
Reserved.
Enable CORB DMA Engine — R/W.
0 = DMA stop
1 = DMA run
After software writes a 0 to this bit, the hardware may not stop immediately. The hardware will
physically update the bit to 0 when the DMA engine is truly stopped. Software must read a 0 from
this bit to verify that the DMA engine is truly stopped.
CORB Memory Error Interrupt Enable — R/W.
If this bit is set the controller will generate an interrupt if the CMEI status bit (HDBAR + 4Dh: bit 0) is
set.
High Definition Audio Controller—D27:F0)
High Definition Audio Controller—D27:F0)
0000h
00h
Intel
®
High Definition Audio Controller Registers (D27:F0)
Description
Description
Attribute:
Size:
Attribute:
Size:
R/W
16 bits
R/W
8 bits
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