Timing Constraints And Optimization User Guide 2021 ((free)) - Synopsys

Creating primary, generated, and virtual clocks to drive the sequential design.

+------------------------------------+ | Read Design, Libraries, and SDC | +------------------------------------+ | v +------------------------------------+ | Phase 1: High-Level Architectural | | Optimization (Structuring) | +------------------------------------+ | v +------------------------------------+ | Phase 2: Gate-Level Mapping | | (Technology Mapping) | +------------------------------------+ | v +------------------------------------+ | Phase 3: Gate-Level Optimization | | (Sizing, Buffering, Layer Swapping)| +------------------------------------+ | v +------------------------------------+ | Verification: Report Timing / Viol | +------------------------------------+ Core Optimization Mechanics

Paths crossing between two entirely unrelated clock domains. synopsys timing constraints and optimization user guide 2021

Master Guide: Synopsys Timing Constraints and Optimization User Guide 2021

Before optimizing a design, the tool performs Static Timing Analysis (STA). STA checks every data path in the design against your specified constraints without simulating the actual logical behavior of the circuit. It validates two primary conditions: Creating primary, generated, and virtual clocks to drive

Modern chip design is not just about speed, but also about power. The 2021 guide covers —a technique to reduce dynamic power by shutting off the clock to inactive registers. The command set_clock_gating_check is used to verify the setup and hold timing on integrated clock-gating (ICG) cells, ensuring that the enable signal arrives at the right time to prevent glitches on the clock line.

: Instructions for creating primary clocks, generated clocks (for PLLs/dividers), and defining clock attributes like jitter (uncertainty) and latency. STA checks every data path in the design

Balancing timing requirements with