Method, device and chip for cross-chip signal synchronization

Abstract

The present application belongs to the technical field of signal synchronization, and provides a cross-chip signal synchronization method, device, and chip. The first chip is used as the execution subject. The method includes: sending a synchronization signal to the second chip according to a predetermined time, so that The second chip records the phase count value corresponding to the clock signal of the second chip when receiving the synchronization signal; the predetermined time is the phase count value corresponding to the clock signal of the first chip when the synchronization signal is sent; obtains the output to The synchronous signal of the pin of the first chip is fed back to the first chip; the phase count value of the first chip and the predetermined time are sent to the second chip when the synchronous signal fed back is received so that the second chip corrects the clock signal of the second chip according to the phase count value of the first chip when receiving the feedback synchronous signal, the predetermined time and the recorded phase count value. The embodiment of the present application solves the problem of delay introduced when calibrating chip signals.

Description

technical field [0001] The invention relates to the technical field of signal synchronization, in particular to a method, device and chip for cross-chip signal synchronization. Background technique [0002] Smart machines are able to complete a variety of complicated tasks, often because there are multiple working chips inside the smart machine. And in order to improve the performance of intelligent machines, multiple chips of the same model can be set to work at the same time. In order to realize the unified operation of multiple chips of the same model, it is necessary to ensure that the clock signals between each chip are synchronized. However, in reality, there are factors such as uncertain circuit delays caused by external capacitors and inconsistent start-up times of different chips in the internal working circuit of the chip, resulting in the asynchronous relationship between the internal clocks of two chips or multiple chips. [0003] In the prior art, the synchron...

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Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a method, device and chip for cross-chip signal synchronization to solve the problem of delay introduced when correcting the chip clock signal

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