A full-function Global Common Module (GCM) prototype for ATLAS Phase-II upgrade

The baseline architecture for the ATLAS Phase-II upgrade has a single-level hardware trigger (Level-0 Trigger) with a maximum rate of 1 MHz and 10 μs latency. A full-function Global Common Module (GCM) prototype has been designed and implemented for the core part of the Level-0 Trigger, the Global Trigger. This GCM features two of the latest Adaptive Compute Acceleration Platform (ACAP) devices from Xilinx, the Versal Premium VP1802, plus twenty 12-channel 25.7 Gb/s FireFly optical engines. Presented here is the design process of this full-function GCM prototype hardware, with the focus on the technology choices and simulation results.