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实验5 电子秒表显示器
- 数码管的初始显示值为00;当1s产生时,秒计数器加一;秒计数到60时清零,并从00,从新开始,如此周而复始进行。(The initial display value of the digital tube is 00; when 1s is generated, the second counter is incremented; when the second is counted to 60, it is cleared, and from 00, the new one is starte