此为秒表计数器的硬件描述语言源程序，有清零键和暂停键。该例子比较简单，适合初学者。有分频、十进制、六进制、秒表共四部分组成-This is the stopwatch counter hardware descr iption language source code , a clear key and the Pause button . The example is simple , suitable for beginners . Took part in the frequency ,