kkehy:
之前经过计算得到20MHZ输入时:50HZ载波:20,000,000/1023=19,550.34213098729hz~=19.55Khz输出点数:19,550.34213098729hz/50HZ=391.006842619745824MHZ输入时:60HZ载波:24,000,000/1023=23,460.41055718475~=23.46Khz输出点数: 23,460.41055718475hz/60hz=391.0068426197458可以看到只要更换晶体就可以改变输出频率;[图片]这是50HZ时