FW82801DB S L66K Intel, FW82801DB S L66K Datasheet - Page 186
FW82801DB S L66K
Manufacturer Part Number
FW82801DB S L66K
Description
Manufacturer
Intel
Datasheet
1.FW82801DB_S_L66K.pdf
(587 pages)
Specifications of FW82801DB S L66K
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Functional Description
5.16.4.4
5.16.4.5
5.16.4.6
186
Table 5-69. Address Field
Table 5-70. Endpoint Field
Address Fields
Function endpoints are addressed using two fields: the function address field and the endpoint
field.
Address Field
The function address (ADDR) field specifies the function, via its address, that is either the source
or destination of a data packet, depending on the value of the token PID. As shown in
total of 128 addresses are specified as ADDR[6:0]. The 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.
Frame Number Field
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 x7FFh, and is sent only for SOF
tokens at the start of each frame.
Data Field
The data field may range from 0 to 1023 bytes and must be an integral numbers of bytes. Data bits
within each byte are shifted out LSB first.
Bit
0
1
2
3
Bit
0
1
2
3
Data Sent
ADDR 0
ADDR 1
ADDR 2
ADDR 3
Data Sent
ENDP 0
ENDP 1
ENDP 2
ENDP 3
Table
Bit
4
5
6
5-70, permits more flexible
Intel
®
82801DB ICH4 Datasheet
Data Sent
ADDR 4
ADDR 5
ADDR 6
Table
5-69, a
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