基于vhdl的数字秒表，计时精度为1/100秒，最长计时时间为59分59.59秒；设有复位开关、起停开关；验证可用。-On vhdl digital stopwatch, timing accuracy of 1/100 seconds, the longest time time of 59 minutes 59.59 seconds with reset switch, start-stop switches validation is available.