Unsupported Features

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When specifying a clock for sequential circuits, counters, etc., keep in mind that the Altera devices do not contain flip-flops that will trigger on both the positive and negative clock edges.

This means that you cannot use just (clk'EVENT), but must use (clk'EVENT and clk = '1').

-- Steven Caranci (caranci@eecg.toronto.edu), January 27, 1999

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