Memory Elements - 2024.1 English

Vivado Design Suite User Guide: Synthesis (UG901)

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2024.1 English

Hardware inferred from a combinatorial process does not involve any memory elements.

A memory element process is combinatorial when all assigned signals in a process are always explicitly assigned in all possible paths within a process block.

A signal that is not explicitly assigned in all branches of an if or case statement typically leads to a Latch inference.

Important: If Vivado synthesis infers unexpected Latches, review the HDL source code for a signal that is not explicitly assigned.