本秒表计时器用于体育竞赛及各种要求有较精确时的各领域。此计时器是用一块专用的芯片，用VHDL语言描述的。它除开关、时钟和显示功能以外，它还包括1/100s计时器所有的控制和定时功能，其体积小，携带方便。(The stopwatch timer is used in sports competitions and in various fields where requirements are more accurate. This timer is written in a VHDL langu

24秒计时器的FPGA实现，分三个模块并内分别附上VHDL程序(24-second timer FPGA implementation)