WG82574IT S LBAC Intel, WG82574IT S LBAC Datasheet - Page 179
WG82574IT S LBAC
Manufacturer Part Number
WG82574IT S LBAC
Description
CONTROLLER, ENET, INTEL 82574IT, 64PQFN
Manufacturer
Intel
Datasheet
1.WG82574IT_S_LBAC.pdf
(490 pages)
Specifications of WG82574IT S LBAC
Ethernet Type
IEEE 802.3, IEEE 802.3u, IEEE 802.3ab
Supply Voltage Range
3V To 3.6V
Operating Temperature Range
-40°C To +85°C
Digital Ic Case Style
QFN
No. Of Pins
64
Package / Case
QFN
Interface Type
I2C, JTAG, PCI, SPI
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Inline Functions—82574 GbE Controller
7.3.6.2.3
Note:
IPv4 Header
IPv6 Header
TCP Header
UDP Header
TCP/IP/UDP Header for the Last Frame
The hardware makes the following changes to the headers of the last packet that is
derived from each TCP segmentation context.
Last frame payload bytes = PAYLEN - (N * MSS)
MAC Header (for SNAP Packets)
IPv4 Header
IPv6 Header
TCP Header
• IP Identification: incremented from last value (wrap around)
• IP Total Length = MSS + HDRLEN - IPCSS
• IP Checksum
• Payload Length = MSS + HDRLEN - IPCSS - Ipv6Size (while Ipv6Size = 40Bytes)
• Sequence Number update: Add previous TCP payload size to the previous sequence
• If FIN flag = 1b, it is cleared in these frames.
• If PSH flag =1b, it is cleared in these frames.
• TCP Checksum
• UDP Length: MSS + HDRLEN - TUCSS
• UDP Checksum
• Type/Len field = Last frame payload bytes + HDRLEN - 14
• IP Total Length = (last frame payload bytes + HDRLEN) - IPCSS
• IP Identification: incremented from last value (wrap around)
• IP Checksum
• Payload Length = last frame payload bytes + HDRLEN - IPCSS - Ipv6Size (while
• Sequence Number update: Add previous TCP payload size to the previous sequence
• If FIN flag = 1b, set it in this last frame
• If PSH flag =1b, set it in this last frame
• TCP Checksum
number value. This is equivalent to adding the MSS to the previous sequence
number.
Ipv6Size = 40Bytes)
number value. This is equivalent to adding the MSS to the previous sequence
number.
179
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