Overview of FeaturesBCM5718 Programmer’s Guide
Broadcom®
January 29, 2016 • 5718-PG108-R Page 53
In an environment of several network servers, typically no server is dedicated to running only the management
console. Host to BMC pass-through functionality identifies host to local BMC-bound packets and routes them
internally to the chip. Similarly, BMC to local host-bound packets are also identified and routed internally to the
NIC chip. Host to BMC pass-through functionality is offered by the BCM5720 controller.
In addition to IEEE 802.3 standard size Ethernet frames, the BCM5718 family also supports jumbo frames of
sizes up to 9622 bytes.
The BCM5718 family of controllers replaces the traditional PNP-based linear regulator with a more efficient
switching regulator. This regulator steps down system supplied 3.3V rail to 1.2V, which it supplies to the chip’s
core.
Figure 2: High-Level System Functional Block Diagram
Note: BCM5719 has the same general architecture, but four ports (ports 0, 1, 2, 3) and a quad-function
PCIe interface.
Dual Function
PCIe
DMA 0 DMA 1
EMAC 0 EMAC 1
GHPY 0 Serdes 0 GHPY 1 Serdes 1
BMC
Host
Chipset
Mgmt
Engine
NC-SI
Pass- through
PCIe Link
BCM5718 Family
Port 0
Port 1
NVRAM
Device
RMII
x2 Gen1 /
x1 Gen2
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