Timing Margin Recovery with Flexible Flip-Flop Timing Model

Provided by: University of Calgary
Topic: Hardware
Format: PDF
In timing signoff for leading-edge SOCs, even few-picosecond timing violations will not only increase design turnaround time, but also degrade design quality (e.g., through power increase from insertion of extra buffers). Conventional flip-flop timing models have fixed values of setup/hold times and clock-to-q (c2q) delay, with some advanced \"Setup-Hold Pessimism Reduction\" (SHPR) methodologies exploiting multiple setup-hold pairs in the timing model. In this paper, the authors propose to use multiple timing models to give more flexibility at timing path boundaries, thus recovering significant \"Free\" margins and reducing the number of timing violations that require unnecessary fixes.

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