Asynchronous clock selection circuit based on cross-clock domain and switching method thereof

Abstract

The invention relates to an asynchronous clock selection circuit based on a cross-clock domain and a switching method thereof, and the asynchronous clock selection circuit selects different clock signals for output according to the requirements of clock selection signals. A clock selection signal and a clock stop signal are synchronized with a target clock signal by using a cross-clock domain asynchronous clock selection circuit. The control signals are synchronized, so that asynchronous clock switching glitches can be avoided to the greatest extent while the asynchronous clock switching stability is improved. The requirement of asynchronous clock switching in an actual clock domain crossing circuit for stability is met, and meanwhile the stability of the clock domain crossing asynchronousclock selection circuit is better than that of a direct clock switching circuit.

Description

technical field [0001] The invention belongs to the field of embedded microprocessors, and proposes a circuit design capable of stably and efficiently switching clocks. Background technique [0002] With the development of consumer electronics, automotive electronics, industrial control and other fields, the application of high-performance embedded microprocessors is becoming more and more extensive, and the requirements for its processing capabilities are also getting higher and higher. At the same time, the application fields of embedded microprocessors are mostly portable devices, consumer electronics and field control devices, and the requirements for their timing are very strict, requiring them to stabilize the clock as much as possible. Therefore, in order to meet the application requirements of the embedded microprocessor, it is necessary to improve its stability without reducing the efficiency as much as possible. [0003] The means of improving the stability of the...

AI Technical Summary

Problems solved by technology

Although this kind of circuit design handles the burr, it also increases the stability of the circuit to a certain extent, but while increasing the efficiency of the circuit, it cannot improve the circuit processing clock and increase the stability to a greater extent.

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