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Model
B3210E
900-9D3B6-00CC-EA0 / 900-9D3B6-00SC-
EA0
B3220
900-9D3B6-00CV-AA0 / 900-9D3B6-00SV-
B3210
AA0
B3240
900-9D3B6-00CC-AA0 / 900-9D3B6-00SC-
AA0
900-9D3B6-00CN-AB0 / 900-9D3B6-00SN-
AB0
3.3.6 NC-SI Management Interface
The BlueField-3 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. Please refer to
Management
Interface for pins.
3.3.7 UART Interface Connectivity
A UART debug interface is available on BlueField-3 boards via a 20-pin NC-SI connector. For DPUs
without onboard BMC hardware, the UART interface is that of the BlueField-3 device. For DPUs with
onboard BMC hardware, the UART interface is that of the NIC BMC device. The connectivity for both
cases is shown in the following table:
NC-SI Connector Pin #
14
16
12
The UART interface is compliant with the TTL 3.3V voltage level. Use a USB-to-UART cable that
supports TTL voltage levels to connect the UART Interface for Arm console access.
It is prohibited to connect any RS-232 cable directly! Only TTL 3.3V voltage level cables are
supported.
Do not use the USB-to-UART cable for NC-SI management purposes.
3.3.8 USB 4-pin RA Connector
The USB 4-pin RA USB connector is used to load operating system images. Use a 4-pin male
connector to a male Type-A cable to connect to the board.
OPNs
Signal on DPU without BMC
BF_UART0_RX
BF_UART0_TX
GND
DDR5 SDRAM On-Board Memory
Dual-channel with 20 DDR5 + ECC (128bit +
16bit ECC)
for a total of 32GB @ 5200MT/s
Dual-channel with 20 DDR5 + ECC (128bit +
16bit ECC)
for a total of 32GB @ 5600MT/s
Signal on DPU with BMC
BMC_RX5
BMC_TX5
GND
NC-SI
22
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