Nvidia BlueField-2 InfiniBand User Manual

NVIDIA BlueField-2 InfiniBand/Ethernet DPU User Guide 37
UART Interface Connectivity
A UART debug interface is available on the DPU cards via the NC-SI connector. The below
table describes the UART interface location and connectivity per the NC-SI connector type
on the DPU you have purchased.
NC-SI
Connector
Type
UART Interface Location and Connectivity
30-pin For DPUs with onboard BMC, the UART interface is that of the BlueField-2
device. For DPUs without onboard BMC, the UART interface is that of the
NIC BMC device.
NC-SI Connector
Pin #
The signal on DPU without
BMC
The signal on DPU with
BMC
30 BF_UART0_RX BMC_RX5
28 BF_UART0_TX BMC_TX5
25 GND GND
Please note the following:
The UART interface is compliant with the TTL 3.3V voltage level. A USB to
UART cable that supports TTL voltage levels should be used to connect the
UART Interface for Arm console access - see example below. Please refer
to UART Cable Installation for installation instructions.
Warnings:
Once a cable is plugged into the UART interface, its other side must
be plugged into a USB connector. Leaving the USB side unconnected
might lead to unexpected behavior of the DPU card.

Nvidia BlueField-2 InfiniBand Specifications

General

Processor	Arm Cortex-A72
Connectivity	InfiniBand, Ethernet
Security	Hardware Root of Trust, Secure Boot
Crypto Acceleration	Yes
Architecture	Arm
PCIe Interface	PCIe 4.0 x16
Security Acceleration	Yes
Network Acceleration	Yes
Network Interface	InfiniBand
Memory	16GB DDR4
Form Factor	PCIe
Product Type	DPU (Data Processing Unit)
Ethernet Speed	200Gbps
Storage	NVMe over Fabric support
Networking Features	RDMA, RoCE, SR-IOV
Cores	8x Arm A72 cores