WG82574L S LBA8 Intel, WG82574L S LBA8 Datasheet - Page 202

• 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

8.4.4.5
8.4.5
202
Silicon Revision ID:
Vendor Specific ID: Four LSB bytes of the device Ethernet MAC address. The device
Ethernet address is taken from the NVM.
Concurrent SMBus Transactions
Concurrent SMBus transactions (receive, transmit and configuration read/write) are
allowed without limitation. Transmit fragments can be sent between receive fragments
and configuration Read/Write commands can also issue between receive and transmit
fragments.
SMBus Notification Methods
The 82574 supports three methods of notifying the MC that it has information that
needs to be read by the MC:
The notification method that is used by the 82574 can be configured from the SMBus
using the Receive Enable command. This default method is set by the NVM in the Pass-
Through Init field.
The following events cause the 82574 to send a notification event to the MC:
There can be cases where the MC is hung and therefore not responding to the SMBus
notification. The 82574 has a time-out value (defined in the NVM) to avoid hanging
while waiting for the notification response. If the MC does not respond until the time
out expires, the notification is de-asserted and all pending data is silently discarded.
Note that the SMBus notification time-out value can only be set in the NVM, the MC
cannot modify this value.
A0
A1
• SMBus alert
• Asynchronous notify
• Direct receive
• Receiving a LAN packet that is designated to the MC.
• Receiving a Request Status command from the MC initiates a status response.
• Status change has occurred and the 82574 is configured to notify the external MC
• Change in any in the Status Data 1 bits of the Read Status command.
MAC Address, Byte 3
Silicon Version
at one of the status changes.
1 Byte
MSB
000b
001b
Revision ID
MAC Address, Byte 2
1 Byte
MAC Address, Byte 1
1 Byte
82574 GbE Controller—System Manageability
MAC Address, Byte 0
1 Byte
LSB