此模块用 ＶＨＤＬ 硬件描述语言来实现，对键盘设计的实际操作检验表明，此模块响应迅速、识别准确，较好地实现了键盘扫描和去抖动功能， 达到了预期的设计目的。同时，将状态机、扫描线、计数器等相关参数稍作改动，就可以扩展到实现不同键盘矩阵的设计-VHDL hardware descr iption language to achieve the keyboard design of the actual operation of testing show that This module in response to the rapid, accurate identification, a better way to realize the keyboard scan and jitter to function, to achieve the desired purpose. Meanwhile, the state machine, scanning lines, counter and other related parameters minor modifications, it can be extended to the realization of the different design of the keyboard matrix