Digital Cymometer VHDL procedures and simulation of the file name: plj.vhd.

数字频率计VHDL程序与仿真 文件名：plj.vhd。 --功能：频率计。具有4位显示，能自动根据7位十进制计数的结果，自动选择有效数据的 --高4位进行动态显示。小数点表示是千位，即KHz。 -Digital Cymometer VHDL procedures and simulation of the file name: plj.vhd.- Function: frequency meter. With four shows that will automatically count seven decimal results, automatic selection of effective data- four for the high dynamic display. Decimal point that is 1000, or KHz.