Application Note: Odd-Fractional Frequency Dividers
It is often necessary to divide a signal frequency by a fixed coefficient, which is simple if this coefficient is an even number equal to 2, 4, 8 and so on. However, dividing by odd or fractional coefficients is a more complicated task. Using the LUTs and DFFs resources in GreenPAK Programmable Mixed-signal IC, one can efficiently divide a given frequency by 1.5, 2.5, 3, 3.5, 4.5, 5, and many other coefficients. Such circuits may be used as a single device or as a part of a larger circuit.