针对利用可编程器件设计的参差脉冲周期电路，分析其竞争冒险产生的原因，提出了修改电路结构解决竞争冒险的办法。
This article reviews a stagger impulse period circuit designed by PLD. By analyzing the reason of competitive risk, the author brings forward a solution of revising the circuit structure.
只要简单修改接口电路，此模块也可以用于其他型号的单片机。
It can also be applied to SCMs of other types with some easy modification to the interface circuit.
该设计方法与传统的设计方法相比，具有外围电路简单，程序修改灵活和调试容易等特点。
Comparing with traditional design method, this design method has characteristics of simple peripheral circuit, easy modificative procedure and debugs, etc.
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