Nvidia BlueField-2 User Manual page 96

Pin#
5 RBT_RXD1
6 GND
7 RBT_CRS_DV
8 RBT_ISOLATE_N
9 GND
Pin Name
Output
Ground
Output
Output
Ground
IO
DPUs, this pin should be connected between the connector and the RBT PHY. No
external termination is required.
50MHz REF CLK for NC-SI BUS
Receive Data Out 1. Data signals from the network controller to the BMC.
For baseboards, this pin should be connected between the baseboard NC-SI over RBT PHY
and the connector. This signal requires a 100 kΩ pull-down resistor to GND on the
baseboard between the BMC and the RBT isolator to prevent the signal from floating
when no card is installed.
For DPUs, this pin should be connected between the connector and the RBT PHY.
External termination is determined by the DPU RBT PHY requirements.
Ground
Carrier sense/receive data valid. This signal indicates to the baseboard that the carrier
sense/receive data is valid.
For baseboards, this pin should be connected between the baseboard NC-SI over RBT PHY
and the connector. This signal requires a 100 kΩ pull-down resistor on the baseboard
between the BMC and the RBT isolator to prevent the signal from floating when no DPU is
installed.
For DPUs, this pin should be connected between the connector and the RBT PHY.
External termination is determined by the DPU RBT PHY requirements.
Signal used to indicate the SmartNIC has powered and is ready for NC-SI physical layer
connection to be present. When low the baseboard circuitry will isolate the NC-SI
connection to the SmartNIC. When high normal NC-SI RBT connectivity is available.
Baseboards should terminate this with a 47K-100K PD resistor.
SmartNICs should terminate with a 10k PU resistor.
Ground
Description/Comments
96