Negative-Edge Register Insertion - 2023.1 English

Vivado Design Suite User Guide: Implementation (UG904)

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2023.1 English

Inserts negative-edge triggered registers to fix difficult hold time violations. A register insertion splits a hold-critical timing path into two half-period paths, making it easier to meet hold requirements. As the name implies, only negative-edge-triggered register insertion is supported which fixes hold violations between two positive-edge-triggered sequential cells.