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3.2.10 PPS IN/OUT Interface
The DPU Controller incorporates an integrated Hardware Clock (PHC) that allows the DPU Controller
to achieve sub-20u Sec accuracy and also offers many timing-related functions such as time-
triggered scheduling or time-based SND accelerations (time-based ASAP²). Furthermore, 5T
technology enables the software application to transmit fronthaul (ORAN) at high bandwidth. The
PTP part supports the subordinate clock, master clock, and boundary clock.
The DPU Controller PTP solution allows you to run any PTP stack on your host.
With respect to testing and measurements, selected NVIDIA DPU Controllers allow you to use the
PPS-out signal from the onboard MMCX RA connecter. The DPU Controller also allows measuring PTP
in scale with the PPS-In signal. The PTP HW clock on the Network adapter is sampled on each PPS-In
signal, and the timestamp is sent to the SW.
3.2.11 External PCIe Power Supply Connector
To power up the above-mentioned DPUs, it is necessary to use a supplementary 8-pin ATX power
cable. Since the power provided by the PCIe golden fingers is limited to66W, a total maximum of
up to150Wis enabled through the ATX 8-pin connector and the PCIe x16 golden fingers.
The maximum power consumptionwhich does not exceed 150W, is in accordance with the mode of
operation of the DPU, and is split between the two power sources as follows:
Up to 66W from the PCIe golden fingers (12V)
The rest of the consumed power is drawn from the external PCIe power supply connector
Important Notes and Warnings
The external ATX power cable is not supplied with the DPU Controller package; however,
this is a standard cable usually available in servers.
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