Nvidia BlueField-2 User Manual page 39

NC-SI Connector Type UART Interface Location and Connectivity
NC-SI Connector Pin #
30
28
25
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
installation instructions.
Warnings:
•
•
•
The signal on DPU without
BMC
BF_UART0_RX
BF_UART0_TX
GND
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.
It is prohibited to connect any RS-232 cable directly! Only TTL 3.3V voltage level cables are supported.
The USB to UART cable is not used for NC-SI management purposes.
The signal on DPU with BMC
BMC_RX5
BMC_TX5
GND
below. Please refer to UART Cable Installation for
39