Features

The main features of the T2 card are as follows:

Card over-stress protection

The T2 card has a card protection circuit that initiates a fatal shutdown if either temperature or power consumption thresholds are crossed.

Before this threshold is reached, however, the SC signals to the AMD Zynq™ UltraScale+™ RFSoC to reduce the 5G workload power immediately. This indication is accomplished using the RF_CPU_RST and RF_RST_REQ handshake signals.

The precise threshold levels have been determined through testing and factory settings to ensure card safety. They cannot be changed.

Out-of-band telemetry

Telemetry data for the card is provided to the server board management controller (BMC) over the PCIe® SM bus from the T2 SC. The PLDM over MCTP protocol is used for this communication between server BMC and T2 SC, and implements a thermal closed loop control mechanism for card cooling.

All required telemetry data, including board temperatures and power consumption, is available.

In-band telemetry

Telemetry data for the card is also available in-band over PCIe. The following telemetry data is available:

• Zynq UltraScale+ RFSoC
• Board inlet temperature
• Board outlet temperature
• DDR4 vicinity temperature
• PCIe 12 V current
• In-band SC firmware update

Note: The PCIe 3.3 V current is characterized (2.6 A) but not measured.

In-band FPGA flash update

Updating the user flash image in-band over PCIe is supported using the flash_app utility provided in the host software installation. Details are found within the T2 Telco Accelerator Card Installation Guide (UG1527).

Some design components must be designed into the Zynq UltraScale+ RFSoC PL and PS to support this function.

Developer support

Developer support features for the Zynq UltraScale+ RFSoC on the T2 card are provided through the maintenance port. See Maintenance Port for details.

LED

A green power-on LED is present on the I/O bracket to indicate the card is powered and in operation.