Device and method for monitoring handshake circuit

Abstract

A monitoring device of a handshake circuit is prepared for utilizing a counter to record effective time of each request signal, setting an error signal to record time that response is not occurred for ack signal on effective time of request signal in set time range and to record relevant waveform at certain time before and after error is occurred for accurately positioning error occurrence time of handshake circuit and for quickly finding error out.

Description

technical field [0001] The invention relates to handshake circuit design, in particular to a handshake circuit monitoring device and method. technical background [0002] A handshake mechanism is usually used in digital circuits to coordinate the data transmission operations of both parties. The handshake mechanism adopts the response type, and the following takes the case where the request signal and the response signal are both high and effective as an example to illustrate its basic principle. Such as figure 1 As shown, first, the initiator sends a high-level request signal, that is, the request signal, to notify the other party to request to send or start sending data; and the responder sends a high-level response when everything is ready or the data reception is completed. Pulse, that is, ack signal; when the initiator receives the ack signal pulse, it immediately pulls down the request signal and turns it into a low level, indicating that the call is over. In the fi...

AI Technical Summary

Problems solved by technology

[0005] The above monitoring method is relatively intuitive, but in the case of high handshake frequency, it is often difficult to accurately locate the moment when the error occurs through the rising edge of the request signal or the ack signal or their combined trigger conditions, and further debugging cannot be done.

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