NHE6300ESB S L7XJ Intel, NHE6300ESB S L7XJ Datasheet - Page 211
NHE6300ESB S L7XJ
Manufacturer Part Number
NHE6300ESB S L7XJ
Description
Manufacturer
Intel
Datasheet
1.NHE6300ESB_S_L7XJ.pdf
(848 pages)
Specifications of NHE6300ESB S L7XJ
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5—Intel
Table 100. Endpoint Field
5.17.5.5 Frame Number Field
5.17.5.6 Data Field
5.17.5.7 Cyclic Redundancy Check (CRC)
5.17.6
5.17.6.1 Token Packets
November 2007
Order Number: 300641-004US
®
6300ESB ICH
The function address (ADDR) field specifies the function, through its address, that is
either the source or destination of a data packet, depending on the value of the token
PID. As shown in
ADDR field is specified for IN, SETUP, and OUT tokens.
Endpoint Field
An additional four-bit endpoint (ENDP) field, shown in
addressing of functions in which more than one sub-channel is required. Endpoint
numbers are function specific. The endpoint field is defined for IN, SETUP, and OUT
token PIDs only.
The frame number field is an 11-bit field that is incremented by the host on a per frame
basis. The frame number field rolls over upon reaching its maximum value of x7FF, and
is sent only for SOF tokens at the start of each frame.
The data field may range from zero to 1023 bytes and must be an integral numbers of
bytes. Data bits within each byte are shifted out LSB first.
CRC is used to protect the all non-PID fields in token and data packets. In this context,
these fields are considered to be protected fields. The PID is not included in the CRC
check of a packet containing CRC. All CRCs are generated over their respective fields in
the transmitter before bit stuffing is performed. Similarly, CRCs are decoded in the
receiver after stuffed bits have been removed. Token and data packet CRCs provide
100% coverage for all single and double bit errors. A failed CRC is considered to
indicate that one or more of the protected fields is corrupted and causes the receiver to
ignore those fields, and, in most cases, the entire packet.
Packet Formats
Table 101
specifying either IN, OUT, or SETUP packet type, and ADDR and ENDP fields. For OUT
and SETUP transactions, the address and endpoint fields uniquely identify the endpoint
that will receive the subsequent data packet. For IN transactions, these fields uniquely
identify which endpoint should transmit a data packet. Only the Intel
may issue token packets. IN PIDs define a data transaction from a function to the
Intel
6300ESB ICH to a function.
Bit
®
0
1
2
3
6300ESB ICH. OUT and SETUP PIDs define data transactions from the Intel
shows the field formats for a token packet. A token consists of a PID,
Data Sent
ENDP 0
ENDP 1
ENDP 2
ENDP 3
Table
99, a total of 128 addresses are specified as ADDR[6:0]. The
Table
Intel
100, permits more flexible
®
6300ESB I/O Controller Hub
®
6300ESB ICH
®
211
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