NHE6300ESB S L7XJ Intel, NHE6300ESB S L7XJ Datasheet - Page 203

• Manufacturer Part Number: NHE6300ESB S L7XJ
• Manufacturer: Intel

Specifications of NHE6300ESB S L7XJ

• Lead Free Status / RoHS Status: Compliant

5—Intel
5.17.3.2 Processing Transfer Descriptors
November 2007
Order Number: 300641-004US
®
6300ESB ICH
The Intel
These basic steps are common across all modes of TDs. Subsequent sections present
processing steps unique to each TD mode.
10. Update Status [PCI Access] (TD.Status and TD.ActualLength).
11. Write the link pointer from the current TD into the element pointer field of the QH
12. Proceed to next entry.
1. The Intel
2. When a QH, go to 1 to fetch from the Queue Element Link Pointer. When inactive,
3. Build token, actual bits are in TD token.
4. When (Host-to-Function) then
5. [Begin USB Transaction] Issue token (from token built in 2, above) and begin data
6. Fetch data from memory (through TD BufferPointer) and transfer over USB until TD
7. Wait for data to arrive (from USB). Write incoming bytes into memory beginning at
8. Issue handshake based on status of data received (Ack or Time-out). Go to 10.
9. Wait for handshake, when required [End of USB Transaction].
go to 12.
end if
transfer.
if (Host-to-Function) then Go to 6
else Go to 7
end if
Max-Length bytes have been read and transferred. [Concurrent system memory
and USB Accesses]. Go to 8.
TD BufferPointer. Internal HC buffer should signal end of data packet. Number of
bytes received must be TD Max-Length; The length of the memory area referenced
by TD BufferPointer.
When the TD was an isochronous TD, mark the TD inactive. Go to 12.
When not an isochronous TD, and TD completed successfully, mark the TD inactive.
Go to 11.
When not successful, and the error count has not been reached, leave the TD
active. When the error count has been reached, mark the TD inactive. Go to 12.
structure. When the Vf bit is set in the TD link pointer, go to 2.
®
[PCI Access] issue request for data, (referenced through TD.BufferPointer)
wait for first chunk data arrival
6300ESB ICH executes a TD using the following generalized algorithm.
®
6300ESB ICH fetches TD or QH from the current Link Pointer.
Intel
®
6300ESB I/O Controller Hub
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