Microelectronics Journal
Proceedings of the 2012 Symposium on Theory of Modeling and Simulation - DEVS Integrative M&S Symposium
Designing energy-efficient NoC for real-time embedded systems through slack optimization
Proceedings of the 50th Annual Design Automation Conference
StarSync: An extendable standard-cell mesochronous synchronizer
Integration, the VLSI Journal
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We describe an all-digital synchronizer that moves multi-bit signals between two periodic clock domains with an average delay of slightly more than a half cycle and an arbitrarily small probability of synchronization failure.The synchronizer operates by measuring the relative frequency of the two periodic clocks and using this frequency measurement, along with a phase detection, to compute a phase estimate.Interval arithmetic is used for the phase estimate to account for uncertainty.The transmitter writes a pair of registers on alternating clock cycles and the receiver uses the estimate of the transmitter's phase to always select the most recently written value that is safe to sample.We show how to incorporate this design into a FIFO to give a fast periodic synchronizer with flow control.We present a number-theoretic argument that the synchronizer works for all frequency combinations.An implementation of the synchronizer using standard cells is also presented.