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本文在异步时序系统的可设计性问题上作了一些探索,提出一种新的设计方法,称为时钟复盖设计法。文中以异步计数器为例,详细讨论了时钟复盖设计法的原理和特点,并对各种各样可能的时钟复盖情况进行了分析。时钟复盖设计法的核心是本文提出的时钟复盖概念。分析表明,在动态卡诺图上应用时钟源的图象(复盖圈)来设计各级触发器的时钟方程和输入方程时,其设计步骤简单明了,设计结果的最佳化较好。此设计法不受任何限制,任何数字计数器都可用它来进行设计。
This article made some exploration on the design of asynchronous timing system, and proposed a new design method, called the clock cover design method. In this paper, the asynchronous counter is taken as an example to discuss in detail the principles and features of clock overlay design method and to analyze various possible clock overlays. Clock cover design method is the core of the concept of the clock cover. The analysis shows that when designing the clock and input equations of the flip-flops on the dynamic Karnaugh map by using the clock source image (cover ring), the design steps are simple and the design results are optimized optimally. This design method is not subject to any restrictions, any digital counter can be used to design it.