NH82801GHM S L8YR Intel, NH82801GHM S L8YR Datasheet - Page 755

• Manufacturer Part Number: NH82801GHM S L8YR
• Manufacturer: Intel

Specifications of NH82801GHM S L8YR

• Lead Free Status / RoHS Status: Compliant

Intel® High Definition Audio Controller Registers (D27:F0)
19.2.42
Intel
®
ICH7 Family Datasheet
SDFIFOS—Stream Descriptor FIFO Size Register
(Intel
Memory Address:Input Stream[0]: HDBAR + 90h
Default Value:
15:8
7:0
Bit
Reserved.
FIFO Size — RO (Input stream), R/W (Output stream). This field indicates the
maximum number of bytes that could be fetched by the controller at one time. This is
the maximum number of bytes that may have been DMA’d into memory but not yet
transmitted on the link, and is also the maximum possible value that the PICB count
will increase by at one time.
The value in this field is different for input and output streams. It is also dependent on
the Bits per Samples setting for the corresponding stream. Following are the values
read/written from/to this register for input and output streams, and for non-padded
and padded bit formats:
Output Stream R/W value:
NOTES:
1.
2.
3.
Input Stream RO value:
NOTE: The default value is different for input and output streams, and reflects the
®
High Definition Audio Controller—D27:F0)
7Fh = 128B
BFh = 192B
FFh = 256B
0Fh = 16B
1Fh = 32B
3Fh = 64B
77h = 120B
9Fh = 160B
Value
All other values not listed are not supported.
When the output stream is programmed to an unsupported size, the hardware
sets itself to the default value (BFh).
Software must read the bit field to test if the value is supported after setting the
bit field.
Value
default state of the BITS fields (in Stream Descriptor Format registers) for the
corresponding stream.
Input Stream[1]: HDBAR + B0h
Input Stream[2]: HDBAR + D0h
Input Stream[3]: HDBAR + F0h
Output Stream[0]: HDBAR + 110h
Output Stream[1]: HDBAR + 130h
Output Stream[2]: HDBAR + 150h
Output Stream[3]: HDBAR + 170h
Input Stream: 0077h
Output Stream: 00BFh
Output Streams
8, 16, or 32 bit Output Streams
20, 24 bit Output Streams
8, 16, 20, 24, or 32 bit Output Streams
8, 16, 20, 24, or 32 bit Output Streams
8, 16, 20, 24, or 32 bit Output Streams
8, 16, 20, 24, or 32 bit Output Streams
Input Streams
8, 16, 32 bit Input Streams
20, 24 bit Input Streams
Description
Attribute:
Size:
16 bits
Input: RO
Output: R/W
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