Only flatten modules that have high timing violations and minimal area impact. 5. Conclusion
: Input port directly to an output port (purely combinational path). Setup and Hold Constraints
set_false_path -from [get_clocks CLK_A] -to [get_clocks CLK_B] Use code with caution. Multi-Cycle Paths ( set_multicycle_path )
When the design moves to physical implementation and signoff with , the timing constraints continue to guide the process. Engineers use PrimeTime, Synopsys' golden signoff-quality STA tool, to run the final, accurate timing checks before tapeout. It reads the design, parasitic information (like SPEF files), and the SDC constraints to ensure every timing path meets its requirements. synopsys timing constraints and optimization user guide 2021
The 2021 documentation introduced enhanced support for advanced process nodes (7nm and below) where parasitic effects are dominant.
A constraint is a rule you type into the software. It tells the tool exactly how fast the data must move.
Allowing multiple clock cycles for a path. Only flatten modules that have high timing violations
# Create a 500 MHz clock with a 50% duty cycle on port 'clk' create_clock -name sys_clk -period 2.0 [get_ports clk] Use code with caution. Generated Clocks
A detailed comparison of AI responses may include mistakes. Learn more Synopsys Synplify Pro for Microchip User Guide
If data is too slow, the software makes the path shorter or uses faster parts. It reads the design, parasitic information (like SPEF
The 2021 guide emphasizes PrimeTime as the industry "golden" signoff tool.
Synopsys tools break down a netlist into discrete timing paths. Every timing path consists of:
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