VLSI Design: LVS (Layout Versus Schematic) in OpenROAD Environment -p2

Continued from VLSI Design: LVS (Layout Versus Schematic) in OpenROAD Environment

OpenROAD Architecture

RTL-to-GDSII Flow Components

The OpenROAD architecture is built around a comprehensive RTL-to-GDSII flow that integrates multiple specialized tools into a cohesive design environment. The flow delivers an autonomous, 24-hour turnaround from RTL to GDSII for rapid design exploration and physical design implementation. This architecture represents a fundamental departure from traditional EDA flows by providing a unified, open-source alternative to expensive proprietary toolchains.

The OpenROAD flow is structured around several key stages that mirror traditional semiconductor design methodologies while leveraging open-source tools. The synthesis stage takes RTL input along with Standard Delay Constraints (SDC), liberty (.lib), and Library Exchange Format (.lef) files and performs logic synthesis using Yosys, producing a gate-level netlist and refined SDC. This synthesis process employs sophisticated algorithms for tech...