WG82574IT S LBAC Intel, WG82574IT S LBAC Datasheet - Page 241
WG82574IT S LBAC
Manufacturer Part Number
WG82574IT S LBAC
Description
CONTROLLER, ENET, INTEL 82574IT, 64PQFN
Manufacturer
Intel
Datasheet
1.WG82574IT_S_LBAC.pdf
(490 pages)
Specifications of WG82574IT S LBAC
Ethernet Type
IEEE 802.3, IEEE 802.3u, IEEE 802.3ab
Supply Voltage Range
3V To 3.6V
Operating Temperature Range
-40°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
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System Manageability—82574 GbE Controller
Figure 53.
8.11.3
8.11.3.1
Figure 53
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
53)
241
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