# Designing a synchronous counter

by xtb789
Tags: counter, designing, synchronous
 Sci Advisor P: 2,751 Designing a synchronous counter Start by making a table of : Input and Present-State versus Next-State. This is called the state transition table. Next you work out what values of J and K are required to make the above transitions. These truth tables (or k-maps) are called the flip-flop excitation tables (maps). For optimal design don't restrict the JK flip-flops to only toggle function but use the following assignments to determine your flip-flop excitation. PS NS J K (comment) 0 0 0 X (no change or reset) 0 1 1 X (set or toggle) 1 0 X 1 (reset or toggle) 1 1 X 0 (no change or set)