Data Sheet
BCM957454M4540C
Single-Port 1/10/25/40/50/100 Gb/s Ethernet PCI Express Gen3 x16 OCP
Mezzanine Card
Overview
The Broadcom BCM957454M4540C is a single-port 1/10/
25/40/50/100 Gb/s adapter designed to the Open Compute
Project (OCP) mezzanine card specification with a QSFP28
network connector. The adapter is designed to the OCP
Mezzanine v2.0 specification as a Type 1 adapter with the
board outline adhering to the original v0.5 dimensions. The
adapter supports both QSFP28/QSFP+ optical modules
and copper direct-attach cables.
®
Features
Single-port pluggable media interface, which may be
equipped with 100 Gb/s or 40 Gb/s QSFP28/QSFP+
optical transceiver or with copper direct-attach cable.
Fully compliant with the SFF-8665 standard.
16-lane PCI Express host interface that is designed to
operate to the PCI Express v3.0 specifications. Support
for up to four external hosts (for example, it has four
PCIe endpoints) multiplexed through the Multi-Host
Bridge (MHB).
SR-IOV with up to 1K virtual functions (VFs).
Function-Level Reset (FLR) support.
TruFlow™ flow processing engine.
Virtual Network Termination-VXLAN, NVGRE, Geneve,
GRE encap/decap.
vSwitch acceleration.
Tunnel-aware stateless offloads.
DCB support: PFC, ETS, QCN, DCBx.
TruManage™ integrated BMC.
Network Controller Sideband Interface (NC-SI).
SMBus 2.0.
MCTP over SMBus.
PCIe-based UART and KCS.
Jumbo frames up to 9 KB.
Advanced Congestion Avoidance.
Multiqueue, NetQueue, and VMQ.
IPv4 and IPv6 offloads.
TCP, UDP, and IP checksum offloads.
Large Send Offload (LSO).
Large Receive Offload (LRO).
TCP Segmentation Offload (TSO).
Receive-side Scaling (RSS).
Transmit-side Scaling (TSS).
VLAN insertion/removal.
Interrupt coalescing.
Network boot – PXE, UEFI.
iSCSI boot.
Wake-on-LAN (WOL).
MSI and MSI.X.
Conforms to the OCP Mezzanine Card Design
Specification v2.0 Type 1.
Single-port 1/10/25/40/50/100-Gigabit Ethernet adapter
for Open Compute Platform systems.
Broadcom Confidential
957454M4540C-DS103
July 18, 2018
BCM957454M4540C
Data Sheet
Single-Port 1/10/25/40/50/100 Gb/s Ethernet PCI Express Gen3 x16 OCP Mezzanine Card
Figure 1:
BCM957454M4540C OCP Mezzanine Card
Broadcom Confidential
957454M4540C-DS103
July 18, 2018
BCM957454M4540C
Data Sheet
Single-Port 1/10/25/40/50/100 Gb/s Ethernet PCI Express Gen3 x16 OCP Mezzanine Card
Table of Contents
Chapter 1: Functional Description .................................................................................................... 4
1.1 Block Diagram
...........................................................................................................................................................4
1.2 Host Interface Connectors
.......................................................................................................................................5
1.3 BCM57454
..................................................................................................................................................................8
1.4 Clock Requirements
.................................................................................................................................................8
1.5 PCI Express Interface
...............................................................................................................................................8
1.6 NC-SI Interface
..........................................................................................................................................................8
1.7 SMBus Interface
........................................................................................................................................................8
1.8 UART Interface
..........................................................................................................................................................9
1.9 Non-volatile RAM
....................................................................................................................................................10
1.10 Heat Sink................................................................................................................................................................10
1.11 DC/DC Regulators
.................................................................................................................................................10
1.12 Power Supplies
.....................................................................................................................................................10
1.13 LED Functions and Locations
.............................................................................................................................11
Chapter 2: Regulatory and Safety Approvals ................................................................................ 12
2.1 Regulatory
...............................................................................................................................................................12
2.2 Safety
.......................................................................................................................................................................12
2.3 Electromagnetic Compatibility (EMC)
...................................................................................................................13
2.4 Electrostatic Discharge (ESD) Compliance
..........................................................................................................13
2.5 FCC Statement
........................................................................................................................................................14
Chapter 3: Physical and Environmental Specifications ................................................................ 15
3.1 Board Physical Dimensions...................................................................................................................................15
3.2 Environment Specifications
...................................................................................................................................16
3.3 Label Information
....................................................................................................................................................16
3.4 MAC Address Label
................................................................................................................................................17
Chapter 4: Ordering Information ..................................................................................................... 18
Appendix A: Acronyms and Abbreviations.................................................................................... 19
Broadcom Confidential
957454M4540C-DS103
3
BCM957454M4540C
Data Sheet
Single-Port 1/10/25/40/50/100 Gb/s Ethernet PCI Express Gen3 x16 OCP Mezzanine Card
Chapter 1: Functional Description
This section provides the functional description of the BCM957454M4540C OCP mezzanine card.
1.1 Block Diagram
Figure 2
shows the main functional blocks on the BCM957454M4540C OCP mezzanine card.
Figure 2: BCM957454M4540C Block Diagram
V33.1
PCIe x8 Gen 3.0 Interface
25G
MRS
PCIe
25G
25G
25G
WAKE_L
QSFP26
Module
Host Connector A
PCIE_RESET_L
NIC_SMB
P0
GPIOs
Control/Status
GPIOs
SMB_LAN Interface
BSC
BSC Interface
NC-SI
NC-SI Interface
50 MHz
Crystal
12V_EDGE
P5_VAUX_EDGE
MAIN/AUX
PWR
SWITCH
12V to 3.3V
Switching
Regulator
V33_1
UART
UART
Interface
QSPI
XTAL
TRC
I/F
Header
QSPI Interface
NVRAM
64 MB
Host Connector B
EXT 2.5V
LDO
JTAG
TPs
V33_1
PCIe x8 Gen 3.0 Interface
PCIE0_A_REFCLK_P/N
V33_1
PCIe
PCIe REFCLKS
VDDC_CORE
PCIE_RESET_L
PCIE0_C_REFCLK_P/N
External circuitry for
VDDC_CORE
Regulation
External circuitry for
IHOSTARRAY P1V9
Regulation
External circuitry for
on chip IHOST 0.8V
Regulation
IHOSTARRAY 1.8V
CLK_100M_MEZZ1_DP/N
IHOST 0.8V
CLK_100M_MEZZa_DP/N
Broadcom Confidential
957454M4540C-DS103
4
BCM957454M4540C
Data Sheet
Single-Port 1/10/25/40/50/100 Gb/s Ethernet PCI Express Gen3 x16 OCP Mezzanine Card
1.2 Host Interface Connectors
The BCM957454M4540C OCP mezzanine card interfaces with the system baseboard via two vertical-stacked card-to-card
connectors. The PCIe bus, NC-SI bus, SMBus interface, various other sideband signals, and power are assigned to these
two connectors. The pinout complies with that of Connector A and Connector B as described in the OCP mezzanine card
2.0 Design Specification.
Table 1
shows the signal pinout for both connectors per the specification. Definitions of the signals
at this connector are provided in the OCP Mezzanine Card Specification.
Table 1: Connector A
Pin
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
A24
A25
A26
A27
A28
A29
A30
A31
A32
A33
A34
A35
A36
Signal
MEZZ_PRSNTA1_N/BASEBOARD_A_ID
P5V_AUX
P5V_AUX
P5V_AUX
GND
GND
P3V3_AUX
GND
GND
P3V3
P3V3
P3V3
P3V3
NCSI_CRSDV
NCSI_RCLK
NCSI_TXEN
PERST_N0
MEZZ_SMCLK
MEZZ_SMDATA
GND
GND
NCSI_RXD0
NCSI_RXD1
GND
GND
CLK_100M_MEZZ1_DP
CLK_100M_MEZZ1_DN
GND
GND
MEZZ_RX_DP<0>
MEZZ_RX_DN<0>
GND
GND
MEZZ_RX_DP<1>
MEZZ_RX_DN<1>
GND
Pin
A37
A38
A39
A40
A41
A42
A43
A44
A45
A46
A47
A48
A49
A50
A51
A52
A53
A54
A55
A56
A57
A58
A59
A60
A61
A62
A63
A64
A65
A66
A67
A68
A69
A70
A71
A72
Signal
GND
MEZZ_RX_DP<2>
MEZZ_RX_DN<2>
GND
GND
MEZZ_RX_DP<3>
MEZZ_RX_DN<3>
GND
GND
MEZZ_RX_DP<4>
MEZZ_RX_DN<4>
GND
GND
MEZZ_RX_DP<5>
MEZZ_RX_DN<5>
GND
GND
MEZZ_RX_DP<6>
MEZZ_RX_DN<6>
GND
GND
MEZZ_RX_DP<7>
MEZZ_RX_DN<7>
GND
P12V_AUX/P12V
P12V_AUX/P12V
P12V_AUX /P12V
GND
GND
P3V3_AUX
GND
GND
P3V3
P3V3
P3V3
P3V3
Broadcom Confidential
957454M4540C-DS103
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