Abstract
The Serenity boards are ATCA custom boards used in the readout of the Phase-II CMS detector. Each board can handle up to 144 optical serial links (up to 25Gb/s each) and supports up to two high-performance FPGAs. In several applications the Serenity board is required to aggregate raw events (Front-End data) from the detector at every Accepted Level 1 trigger and route this event fragment to the central DAQ system. The architecture and behavior of the DAQPATH firmware that collects and merges Front-End data and manages their transmission to the DAQ system over 25Gb/s output optical links are here described. • Data, trigger, readout electronics for HEP CMS experiment. • High speed links communication. • HDL firmware design.
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