Circuit detection device and circuit detection method

Abstract

The invention discloses a circuit detection device and a circuit detection method. The circuit detection device comprises N+1 register units and a selection unit, wherein N is a natural number greater than or equal to 1; the N+1 register units are in cascade connection with each other; the output terminals of the register units are respectively connected with the different input terminals of the selection unit; all the register units receive the same clock signal and register an input signal value in each clock period; and according to a selection signal inlet from a select terminal, the selection unit selects one or more of the output values of the N+1 register units for logical operations to obtain a value which is output by the selection unit, so that the output value of the detection device appears before an expected moment, after the expected moment or at the expected moment. Through the application of the circuit detection device and the circuit detection method disclosed by the invention, the defect that the design errors of asynchronous circuits are hard to find out in simulation and verification stages is overcome, and the safety of the asynchronous circuits is guaranteed.

Description

technical field [0001] The invention relates to the field of circuit design, in particular to a circuit detection device and method. Background technique [0002] In multi-clock circuit design, signal transmission between asynchronous clock domains requires a synchronous circuit to ensure the security of the design. Commonly used synchronous circuits such as figure 1 shown. [0003] When there are many clocks in the circuit, there are many signals interacting between the clock domains, and the number of synchronous circuits is also large. In order to facilitate the inspection of whether all the signals interacting between the clock domains have been synchronized, and to unify the practice of synchronous circuits, the synchronous circuit is generally separated from the overall circuit and made into a standard synchronous circuit module. Whenever there is a need in the design At the point of signal synchronization, call this module. [0004] In fact, not all designs can gua...

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Problems solved by technology

[0008] The invention provides a device and method for detecting the safety of signal transmission between asynchronous clock domains, which is used to solve the problem that designers are difficult to find hidden dangers in asynchronous circuit design in the prior art

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