Metastability affects all FPGA designs. Learn how setup and hold violations cause metastable events and timing errors.

2009年7月30日 · Metastability is a phenomenon that can cause system failure in digital devices, including FPGAs, when a signal is transferred between circuitry in unrelated or asynchronous clock domains

Understanding Metastability in FPGAs This white paper describes metastability in FPGAs, why it happens, and how it can cause design failures. It explains how metastability MTBF is calculated, and highlights how various device and design parameters affect the result.

The following white paper explains metastability and clock domain crossing issues in hardware designs, outlining various design practices to make designs immune to metastability effects and functional non-determinism introduced by clock domain crossings.

2020年12月26日 · One of the most critical aspects of any FPGA design is where two clock domains meet. The general rule is to avoid this at all costs, but there are situations where it’s unavoidable. A simple situation is shown in Fig. 1, where our system is receiving data from an ADC, but speaking on a common bus.

2023年10月30日 · Metastability is a phenomenon where a digital flip-flop (like a D flip-flop) enters an undefined state, somewhere between a logical '0' and a logical '1'. This happens when the input to the flip-flop changes too close to the clock edge.

2009年12月18日 · Metastability is a phenomenon that can cause system failure in digital devices when a signal is transferred between circuitry in unrelated or asynchronous clock domains. This paper describes metastability in FPGAs, explains why the phenomenon occurs, and discusses how it causes design failures.

This Doulos FPGA TechNote gives a brief overview of metastability as it applies to the design of FPGAs. The first section introduces metastability and gives links to resources.

2019年6月8日 · Metastability is a state in asynchronous digital systems or systems that employ the use of more than one independent clock domains and can cause significant damage in the form of system failure, particularly in FPGAs. How Does it Work in an FPGA?

In this paper, we present a comprehensive suite of techniques for modeling, characterizing and optimizing metastability effects in FP-GAs. We first discuss a theoretical model of metastability, and verify the predictions using both circuit level simula-tions and board measurements.