# Change naming rules to ensure compatibility with downstream tools change_names -rules verilog -hierarchy # Save the primary structural gate-level Verilog netlist write -format verilog -hierarchy -output ../mapped/top_module.v # Save the design constraints in Synopsys Design Constraints (SDC) format write_sdc ../mapped/top_module.sdc # Save the internal binary design format database write -format ddc -hierarchy -output ../mapped/top_module.ddc Use code with caution. 4. Automation with Tcl Scripts
During the link step, Design Compiler resolves references between your modules and connects them to the libraries listed in your link_library variable. The check_design command identifies potential synthesis hazards such as latches, multi-driven nets, or unconnected ports. 4. Defining Design Constraints (SDC)
Use set_driving_cell on all input ports. DC 2021 is stricter about floating inputs. synopsys design compiler tutorial 2021
The generated gate-level output files are exported for downstream Verification, Formal Equivalence Checking, and Place and Route (P&R).
# Save the gate-level netlist write -format verilog -hierarchy -output outputs/top_module.v # Save design constraints to SDC format write_sdc outputs/top_module.sdc # Save internal design database write -format ddc -hierarchy -output outputs/top_module.ddc Use code with caution. 4. Running Design Compiler (Command-Line vs. GUI) Command-Line Mode (Batch Mode) # Change naming rules to ensure compatibility with
Synopsys Design Compiler (2021) is an industry-standard tool for synthesizing RTL code into optimized gate-level netlists, utilizing topographical flows for better timing, area, and power results. The process involves setting up a .synopsys_dc.setup file, defining constraints (SDC), running compile_ultra , and analyzing results with reports before exporting the final netlist. For a detailed guide, see the Design Compiler Tutorial 2021.
: Contains the visual representations of logic gates used for schematic generation in the Graphical User Interface (Design Vision). Example .synopsys_dc.setup Script DC 2021 is stricter about floating inputs
After synthesis, verify if the design meets its targets through generated reports. What is Synthesis? – How it Works | Synopsys
Registering the outputs of your sub-modules simplifies timing budgeting. It makes input and output delays predictable across chip boundaries.