数字电路设计中部分常见问题解析

借助一个双向计时器的设计电路,以举例的形式对数字电路设计中3个方面的常见问题进行了较为详尽地分析,并提出了一些见解,即针对控制设计方面在分析了其实质要求的基础上提出解决问题的关键是选取合适的输入控制信号和正确列出真值表或状态表,针对时序方面通过比较同步和异步的特点并指出可采用同步的"分频"和异步的"级联"完成设计,而针对引脚方面则解析了一般芯片中几个特殊引脚并准确阐述了其所蕴含的不容易被理解的概念。

Analysis of partial common problems on design of digital circuit

Based on the design circuit of two-way Timer,this paper analyse three aspect common problems on design of digital circuit and propose some insights by example,i.e.,analyse essential requirements and puts forward that selecting the appropriate input control signal and listing the correct truth table and state table are the key to solve the problem about the aspect of control,comparing synchronous and asynchronous characteristics and points out that two methods of synchronous "frequency-dividing" and asynchronous "cascade" can be used on design of digital circuit about the aspect of time sequence,discuss some special pins of general chips and accurate elaborate their not easy to be understood concept about the aspect of Pins.