该程序用VHDL硬件描述语言编写而成,已调试通过,程序运行后可实现三分频,这样就用软件设计代替了硬件设计,方便,稳定,不需要硬件调试!-the procedures used VHDL hardware descr iption language, prepared debugging has passed, After running third frequency can be realized, so software designed to replace the hardware de