假定系统时钟为50MHz，试设计一个电子秒表电路，使其按0.01s 的步长进行计时。该电子秒表具有异步清零和启动/停止计数功能，最大能计到59.99s，并用数码管显示计数值。用发光二极管显示向分钟的进位信号。-Assume that the system clock to 50MHz, the design of an electronic stopwatch test circuit, so the step by 0.01s to time. The electronic stopwatch