Judit Freijedo

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In nanoscale FPGAs, variability and aging significantly limit performance. In this paper, a novel aging monitoring methodology for FPGA-based designs to mitigate those effects is proposed. Local sensors are embedded in the configured functionality, monitoring critical paths, at production or during product lifetime. No design freeze (slice and routing(More)
The purpose of this paper is to present a new robust methodology for synchronous communications in a BUS, connecting multi-clock domains. Traditionally, when robust solutions are needed, an asynchronous communication is used. However, the low transfer rates associated with asynchronous solutions make them inadequate for high performance digital systems. On(More)
The objective of this paper is to propose a performance failure prediction methodology for FPGA-based designs, based on the use of a novel built-in programmable delay sensor. Digital Clock Managers (DCM) is used to fine tune the unsafe observation interval. The design procedure is described, including the constrained placement of some delay sensors. The(More)
The use of Real-Time Operating Systems (RTOSs) became an attractive solution to simplify the design of safety-critical real-time embedded systems. Due to their stringent constraints such as battery-powered, high-speed and low-voltage operation, these systems are often subject to transient faults originated from a large spectrum of noisy sources, among them,(More)
1 IST / INESC-ID Lisboa, R. Alves Redol, 9, 3o, 1000-029 Lisboa, Portugal, paulo.teixeira@ist.utl.pt 2 Univ. of Algarve, School of Technology, Campus da Penha, 8005-139 Faro, Portugal, jsemiao@ualg.pt 3 PUCRS, Electrical Engineering Dept., Av. Ipiranga, 6681, 90619-900 Porto Alegre, Brazil, vargas@computer.org 4 Univ. of Vigo, Dept. de Tecnología(More)