DIRECT_ENABLE - 2022.1 English

Vivado Design Suite User Guide: Synthesis (UG901)

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2022.1 English

Apply DIRECT_ENABLE on an input port or other signal to have it go directly to the enable line of a flop when there is more than one possible enable, or when you want to force the synthesis tool to use the enable lines of the flop.

The DIRECT_ENABLE attribute can be placed on any port or signal.