The count value during this total time Period multiplied by 400ns offers the total time period of the signal. The
inverse of the period is the required frequency with ±1 count accuracy i.e.±0.002% accuracy. The time period as
well as frequency is displayed on 16X2 LCD display and PC interfaced with USART (Universal Synchronous
Asynchronous Receiver Transmitter) for further data analysis.Fig.2 shows the system overview.