WG82574L S LBA8 Intel, WG82574L S LBA8 Datasheet - Page 206

• 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

8.6.1
Table 53.
Note:
8.6.2
206
Last
Last
Not Last
Not Last
Previous
If the network link is down when the 82574 has received the last fragment of the
packet from the MC, it silently discards the packet. Note that any link down event
during the transfer of any packet over the SMBus does not stop the operation since the
82574 waits for the last fragment to end to see whether the network link is up again.
Transmit Errors in Sequence Handling
Once a packet is transferred over the SMBus from the MC to the 82574, the F and L
flags should follow specific rules. The F flag defines that this is the first fragment of the
packet; the L flag defines that the transaction contains the last fragment of the packet.
Flag options during transmit packet transactions lists the different flag options in
transmit packet transactions:
Flag Options During Transmit Packet Transactions
First
Not First
First
Not First
Since every other Block Write command in TCO protocol has both F and L flags off, they
cause flushing any pending transmit fragments that were previously received. When
running the TCO transmit flow, no other Block Write transactions are allowed in
between the fragments.
TCO Command Aborted Flow
The 82574 indicates to the MC an error or an abort condition by setting the TCO Abort
bit in the general status. The 82574 might also be configured to send a notification to
the MC (see
Following is a list of possible error and abort conditions:
• Any error in the SMBus protocol (NACK, SMBus timeouts, etc.).
• Any error in compatibility between required protocols to specific functionality (for
• If the 82574 does not have space to store the transmitted packet from the MC (in
• Error in the F/L bit sequence during multi-fragment transactions.
• An internal reset to the 82574's firmware.
Current
example, RX Enable command with a byte count not equal to 1/14, as defined in
the command specification).
its internal buffer space) before sending it to the link, the packet is discarded and
the external MC is notified via the Abort bit.
section
Accept both.
Error for the current transaction. Current transaction is discarded and an abort status is
asserted.
Error in previous transaction. Previous transaction (until previous First) is discarded.
Current packet is processed.
No abort status is asserted.
Process the current transaction.
8.8.1.3.3).
Action/Notes
82574 GbE Controller—System Manageability