复杂可编程逻辑器件在弹跳消除电路中的设计与应用

Design of a Circuit Based on CPLD to Eliminate Bounce

按键的弹跳现象,是数字系统设计中客观存在的问题.为了增加电路设计的灵活性,选用MAX+plusⅡ软件,采用自顶向下的模块化设计方法,提出一种利用CPLD器件实现的弹跳消除电路,该电路具有故障率低、使用灵活、便于修改、在系统可编程性及可移植性强等优点.

A phenomenon,the bounce of keys,is the objectively existing problem in the design of digital system.To enhance the flexibility in a circuit design, a circuit realized by the use of CPLD to elininate debounce is presented in this paper. During the design of this circuit,the software of MAX+plusⅡ is selected and the top-down modularization design method is adopted,The circuit has the features of lower fault rate,good flexibility,being easily modified,in system programmability and powerful transplantable capability.