Started using the design_vision command. Excellent for analyzing schematics, visualizing critical paths, and debugging timing violations visually.
Mastering Design Compiler is essential for any digital chip designer or CAD engineer, and the skills you build from this 2021-era foundation will serve you well on any modern version, including the latest DC NXT.
Before launching Design Compiler, you must organize your workspace and define your target technology libraries. Create a clean project directory with the following structure:
| Error Message | Likely Cause | 2021 Solution | | :--- | :--- | :--- | | Library 'typical' does not contain cell 'AND2X1' | Missing link library or wrong view. | Check report_lib typical . Use list_libs to verify. | | No constrained paths found | Clock not reaching flip-flops. | Run check_timing . Ensure create_clock uses correct get_ports . | | Timing loop detected | Combinational feedback without cut. | Use set_disable_timing on the specific false path, or restructure RTL. | | Compile_ultra license checkout failed | License server issue. | Ensure your LM_LICENSE_FILE points to 2021 license strings. Use compile instead of compile_ultra as fallback. | synopsys design compiler tutorial 2021
Pay close attention to warnings regarding omitted latches or truncated buses during the elaborate step. Inferred latches often indicate incomplete always blocks or missing default branches in case statements.
set tech_lib /proj/tech_libs/90nm/typical set target_library $tech_lib/ss_0.9v_125c.db set link_library [list * $target_library $tech_lib/memory_compiler.db] set symbol_library $tech_lib/symbols.sdb
The standard synthesis flow followed by industry teams typically involves the following steps: Started using the design_vision command
Are you encountering specific in your design?
Enable compile_ultra , rewrite long logic paths into smaller pipeline stages, or ease clock constraints.
# Read top-level Verilog read_verilog ./rtl/cpu.v ./rtl/alu.v ./rtl/regfile.v Before launching Design Compiler, you must organize your
Once constraints are applied, you run the optimization engine. For basic designs, the structural compilation is straightforward. For advanced designs, explicit architectural flags are passed.
Synopsys Design Compiler (DC) is the industry-standard tool for translating Register-Transfer Level (RTL) hardware descriptions into optimized, technology-specific gate-level netlists. This tutorial provides a structured, step-by-step workflow for executing synthesis using Design Compiler, optimized around the 2021 Topographical features and standard industry practices. 1. Introduction to Synthesis and Design Compiler
The basic design flow using Synopsys Design Compiler involves: