Creating Sequential Logic

Logic is sequential if outputs at a specified time are a function of the inputs at that time and at some or all preceding times. All sequential circuits must include one or more flipflops. Sequential logic can be implemented in AHDL with state machines, registers, or latches; library of parameterized modules (LPM) functions are also available. State machines are especially useful for implementing sequential logic. Other examples of sequential logic include counters and controllers.

Information on sequential logic is available in the following topics:

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