Synthesis
Logic synthesis is where RTL becomes gates. This path covers how Design Compiler and Genus read your RTL, apply constraints, map to a standard cell library, and optimize for timing, area, and power. You learn to write clean SDC and read synthesis QoR like an engineer who has shipped silicon.
Introduction to Synthesis
Key Terms - Defined Before We Go Further
Detailed Synthesis Flow
The synthesis flow transforms RTL into an optimized gate-level netlist through several distinct stages, each with specific goals and transformations.
Synopsys Design Compiler (DC)
Design Compiler is the industry-standard synthesis tool from Synopsys. It supports hierarchical synthesis, compile strategies, and advanced optimization for tim
Cadence Genus
Genus is Cadence's modern synthesis solution featuring concurrent optimization and a unified data model with Innovus for seamless handoff.
Timing Constraints (SDC)
Clock & I/O Timing Waveform - SDC Constraints Visualized
Optimization Techniques
Logic sharing, constant folding, dead code elimination, cell downsizing. Minimize cell count and wire length. Use compile -map_effort high and set_max_area 0.
Quality of Results (QoR)
QoR is the overall measure of synthesis success across all objectives: timing, area, power, and design rule compliance. A good synthesis engineer tracks all fou
Retiming: Moving Registers to Balance Logic
Relocating flops across logic to shorten the critical path
Hierarchy: Ungroup, Flatten, and Boundary Optimization
When to dissolve module boundaries and when to keep them
Power-Aware Synthesis: Clock Gating and Multi-Vt
Cutting dynamic power with gating and leakage with cell swaps
DFT and Scan-Aware Synthesis
Building testable logic by stitching flops into scan chains