The Final prototype of the Fast Merging Module (FMM) for readout status processing in CMS DAQ

The Trigger Throttling System (TTS) adapts the trigger frequency to the DAQ readout capacity in order to avoid buffer overflows and data corruption. The states of all ~640 readout units in the CMS DAQ are read out and merged by hardware modules (FMMs) to obtain the status of each detector partition. The functionality and the design of the second and final prototype of the FMM are presented in this paper.