The FERMI system has been designed to perform acquisition and DSP of calorimeter data in high energy collision experiments, planned at the LHC collider (CERN, Geneva, CH). The system relies mainly upon the FERMI chip, a dedicated VLSI multi-chip device: it requires rad-hard features due to the critical application, to the difficulties in maintenance. And to the operating environment. In this paper, a modular approach to support policies for self diagnosis and fault tolerance is discussed.
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