首先介绍了防抖型矩阵式键盘的整体设计思路,然后采用模块化设计方法对各个电路用VHDL进行设计,最后进行顶层文件设计和仿真,并用PLD器件下载验证.整个电路具有故障率低、使用灵活、便于修改、在系统可编程性及可移植性强等优点. -First introduced the anti-shake-type matrix keyboard' s overall design concept, and then use a modular design approach to the variou