WG82574L S LBA8 Intel, WG82574L S LBA8 Datasheet - Page 216

• Manufacturer Part Number: WG82574L S LBA8
• Manufacturer: Intel

Specifications of WG82574L S LBA8

• Operating Supply Voltage (typ): 3.3V
• Operating Temp Range: 0C to 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 64
• Lead Free Status / RoHS Status: Compliant

8.8.2.1
8.8.2.1.1
216
Receive TCO Packet
Receive TCO Long Status
Function
Function
Receive TCO LAN Packet Transaction
The MC uses this command to read packets received on the LAN and its status. When
the 82574 has a packet to deliver to the MC, it asserts the SMBus notification for the
MC to read the data (or direct receive). Upon receiving notification of the arrival of a
LAN receive packet, the MC begins issuing a Receive TCO packet command using the
block read protocol.
A packet can be transmitted to the MC in at least two fragments (at least one for the
packet data and one for the packet status). As a result, MC should follow the F and L bit
of the op-code.
The op-code can have these values:
If a notification timeout is defined (in the NVM) and the MC does not finish reading the
whole packet within the timeout period, since the packet has arrived, the packet is
silently discarded.
Following is the receive TCO packet format and the data format returned from the
82574.
Receive TCO LAN Status Payload Transaction
This transaction is the last transaction that the 82574 issues when a packet received
from the LAN is transferred to the MC. The transaction contains the status of the
received packet.
The format of the status transaction is as follows:
The status is 16 bytes where byte 0 (bits 7:0) is set in Data 2 of the status and byte 15
in Data 17 of the status.
Receive TCO First
Fragment
Receive TCO Middle
Fragment
Receive TCO Last
Fragment
• 0x90 - First Fragment
• 0x10 - Middle Fragment
• When the opcode is 0x50, this indicates the last fragment of the packet, which
contains packet status.
Function
17 (0x11)
0xC0 or 0xD0
Count
Byte
Command
0x50
Data 1
Code)
(Op-
N
N
Count
Byte
See Below
Data 2 – Data 17 (Status Data)
0x90
0x10
0x50
Data 1
Code)
(Op-
Packet
Data Byte
Packet
Data Byte
Packet
Data Byte
82574 GbE Controller—System Manageability
Data 2
…
…
Packet Data
Byte
Data N