WG82574L S LBA8 Intel, WG82574L S LBA8 Datasheet - Page 231

• 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

System Manageability—82574 GbE Controller
Figure 49.
8.11.3
8.11.3.1
Figure 49
example, one NC package has two NC channels and the other has only one NC channel.
Two NC Packages (Left, with Two NC Channels and Right, with One NC
Channel)
Scenarios in which the NC-SI lines are shard by multiple NCs (as shown in
mandate an arbitration mechanism. The arbitration mechanism is described in
section
Data Transport
Since NC-SI is based upon the RMII transport layer, data is transferred in the form of
Ethernet frames.
NC-SI defines two types of frames transmitted on the NC-SI interface:
Control Frames
NC-SI control frames are identified by a unique NC-SI EtherType (0x88F8).
Control frames are used in a single-threaded operation, meaning commands are
generated only by the MC and can only be sent one at a time. Each command from the
MC is followed by a single response from the NC (command-response flow), after which
the MC is allowed to send a new command.
1. Control frames:
2. Pass-through frames:
a. Frames used to configure and control the interface.
b. Control frames are identified by a unique EtherType in their L2 header.
a. The actual LAN pass-through frames transferred from/to the MC.
b. Pass-through frames are identified as not being a control frame.
c.
8.15.1.
Pass-through frames are attributed to a specific NC channel by their source MAC
address (as configured in the NC by the MC).
shows an example topology for a single MC and two NC packages. In this
ChannelID=0x0
NC Channel
Internal
LAN0
Package ID = 0x0
NC Package
ChannelID=0x1
NC Channel
Internal
LAN1
Management Controller
(MC)
NC-SI Link
Package ID = 0x1
ChannelID=0x0
NC Package
NC Channel
Internal
LAN
Figure
49)
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