DDR5 SDRAM On-Board Memory
The DPU Controllers incorporate 20 units of DDR5 SDRAM for a total of 48GB @
5200MT/s single or dual channels. 64/128bit + 8bit ECC per channel, solder-down
memory.
NC-SI Management Interface
The DPU Controller enables the connection of a Baseboard Management Controller
(BMC) to a set of Network Interface Controller (NICs) to enable out-of-band remote
manageability. The NC-SI management is supported over RMII and has a connector on
the DPU Controller. Please refer to NC-SI Management Interface for pins.
The maximum trace length on the board is 5.7inch.
UART Interface Connectivity
The UART debug interface on BlueField-3 boards can be accessed through a 20-pin NC-SI
connector, which is associated with the NIC BMC device. The connectivity is shown in the
following table:
NC-SI Connector Pin # Signal on Board
12 GND
14 UART_TX
16 UART_RX
Warning
The USB to UART cable is not used for NC-SI management purposes.
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