Product Data Sheet / Brochure

Broadcom 957414M4142C-DS107
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BCM957414M4142C Data Sheet Dual-Port 25 Gb/s SFP28 Ethernet PCI Express 3.0 x8 OCP 2.0 Mezzanine Card
1.3 BCM57414 Ethernet Controller
The BCM57414 Ethernet Controller is configured as dual-port 25 Gb/s MAC with integrated SFP28 interface to the line side
and x8 PCI Express v3.0 interface to the system host.
1.4 PCI Express Interface
PCIe is a high-bandwidth serial bus providing a low pin-count interface as an alternative to parallel PCI. It is part of the Host
Interface Connector. The BCM57414 complies with the PCI Express Base Specification Revision 3.0, and supports an 8-
lane PCIe 3.0 interface via the host interface connector.
1.5 NC-SI Interface
The BCM57414 Ethernet Controller supports the Network Controller Sideband Interface (NC-SI) Specification version 1.1.0.
The NC-SI provides a standardized interface between the system Baseboard Management Controller (BMC) and the
integrated NC-SI module of the BCM57414.
1.6 SMBus Interface
The BCM57414 Ethernet Controller SMB0 interface supports serial communications between BCM57414 and the system.
The interface allows the Ethernet Controller to act as a SMBus primary or a secondary device.
1.7 UART Interface
The BCM57414 Ethernet Controller has an integrated UART interface that supports external access to its registers. The
UART signals are brought out to the 4-pin header for connecting a remote access host. The UART debug connector is placed
near the I/O connector to be accessible from outside, for ease of in-system debug.
Table 2: UART Connector Pinout
Pin Signal
1 UART_TXD
2 UART_RXD
3 V33
4 GND