TFFE Primitive
The TFFE primitive allows you to specify a T-type flipflop with clock enable.
Note: When the ENA (clock enable) input is high, the flipflop passes a
signal from T to Q. When the ENA
input is low, the state of Q is maintained, regardless of the
T input.
For devices that do not support clock enable, logic synthesis generates logic equations containing flipflops with clock enables. These logic equations correctly emulate the logic specified in any project.
Note: For information about Intel® Quartus® Prime primitive instantiation, go to Using a Intel® Quartus® Prime
Logic Function.