Product Data Sheet / Brochure
Table Of Contents
Broadcom 957416M4163C-DS103
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BCM957416M4163C Data Sheet Dual-Port 10GBASE-T Ethernet PCI Express 3.0 x8 OCP Mezzanine Card
Figure 3: UART Debug Connector
1.9 Nonvolatile RAM
The BCM57416 Ethernet Controller requires a nonvolatile serial flash memory (NVRAM) to store the device firmware, PCI
Configuration space settings (for example, Device ID, Vendor ID), MAC address, and so on. After power-up, the firmware is
downloaded into the device memory and executed by the on-chip processor.
1.10 Heat Sink
The passive heat sink is attached to the Ethernet Controller using four spring-loaded push pins that insert into four mounting
holes.
To prevent damage to the BCM57416 Ethernet Controller in the event of a missing heat sink, the mezzanine card is not
allowed to power up.
1.11 DC/DC Regulators
The onboard voltage regulators use the 12V edge main power from the host interface connector to derive the necessary
power rails for different circuits and components on the board.
1.12 Power Supplies
All power is derived from the Mezzanine Card Host Interface Connector 12V/5V supply pins. These voltage supply pins feed
on-board regulators that provide the necessary power to the various components on the card. The mezzanine card has six
switching power supplies that power the card’s various +1.0V, +1.25V, +1.8V, and +3.3V loads.