WG82574L S LBA9 Intel, WG82574L S LBA9 Datasheet - Page 179

• Manufacturer Part Number: WG82574L S LBA9
• Description: CONTROLLER, ENET, INTEL 82574L, 64PQFN
• Manufacturer: Intel

Specifications of WG82574L S LBA9

• Ethernet Type: IEEE 802.3, IEEE 802.3u, IEEE 802.3ab
• Supply Voltage Range: 3V To 3.6V
• Operating Temperature Range: 0°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

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.
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