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文章介绍８０Ｃ５５单片机定时器Ｔ２和捕捉比较逻辑的基本工作原理，给出应用定时器Ｔ２和捕捉比较逻辑测量脉冲频率、周期的硬件电路及软件程序。同时介绍利用捕捉比较逻辑做定时自动变换的应用实例。
The article introduces the basic working principle of 80C55 single-chip timer T2 and capture compare logic, and gives the hardware circuit and software program that uses timer T2 and capture compare logic to measure pulse frequency and period. At the same time introduce the use of capture comparison logic to do time-based automatic conversion application examples.