Synopsys Design Compiler Tutorial 2021 !!better!! Jun 2026

compile_ultra is license-intensive but yields significantly better timing results (typically 10-15% improvement over standard compile).

Save the consolidated script below as run_synth.tcl . Run it in your terminal via the design compiler shell environment: dc_shell -f run_synth.tcl .

Specifies the directories where DC looks for design files and libraries.

write_sdf -version 2.1 sdf/my_design.sdf synopsys design compiler tutorial 2021

Design Compiler is entirely constraint-driven. Without realistic constraints, the tool may produce an excessively large layout or fail to meet operational speeds. Constraints are specified using Synopsys Design Constraints (SDC) syntax. Clock Constraints

Create a .synopsys_dc.setup file in your project directory and populate it with the following core variables:

Constraints tell Design Compiler how fast the circuit needs to run and how much physical space it can occupy. These constraints are typically written using Synopsys Design Constraints (SDC) syntax. Specifies the directories where DC looks for design

# 2. Define Design Library define_design_lib WORK -path ./WORK

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# Create a clock named 'clk' with a period of 10ns (100MHz) create_clock -name clk -period 10 [get_ports clk] export the final files for placement

Once the timing constraints are met and violations are cleared, export the final files for placement, routing, and post-synthesis verification.

# Define the primary clock (Period in nanoseconds) create_clock -name sys_clk -period 2.0 [get_ports clk] # Model clock uncertainty (Jitter and Skew) set_clock_uncertainty 0.15 [get_clocks sys_clk] # Define Input and Output delays relative to the clock edge set_input_delay 0.4 -clock sys_clk [remove_from_collection [all_inputs] [get_ports clk]] set_output_delay 0.4 -clock sys_clk [all_outputs] # Model electrical environment attributes set_driving_cell -lib_cell BUFX2 [remove_from_collection [all_inputs] [get_ports clk]] set_load [load_of typical/BUFX4/A] [all_outputs] # Set operating conditions set_operating_conditions -max "typical" Use code with caution. Step 3: Compiling and Optimizing the Design