本单片机设计的数字频率计 能够准确测量频率为1HZ-15MHZ，适用为方波，三角波及正弦波，可在人为的

用拨位开关在测量周期，频率及占空比之间转换，频率精度为1HZ，周期精度为

0．1微秒，占空比计时精度为0.1微秒。

-microcontroller design of the digital frequency meter can be accurately measured frequency 1HZ - 15MHZ. apply for the square, triangle affected sine wave can be used in artificial spaces allocated switch in measurement cycle, frequency and duty cycle to convert between the frequency accuracy of a 9999, the cycle accuracy of 0.1 microsecond, duty cycle time accuracy of 0.1 microsecond.