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{"gt_parse": {"c2t": "The block diagram illustrates The OpenLane Flow, which is a process flow for automated digital circuit design, specifically for ASIC (Application-Specific Integrated Circuit) implementation. The diagram shows the sequence of steps and tools used in the design process, starting from the initial design files to the final output formats for chip fabrication. Here's a detailed description of the flow:1. **Input Files**: The process begins with the input design files, typically written in Verilog (as indicated by the design/src/*.v notation), which contain the hardware description of the digital circuit.2. **Synth Exploration**: This is the initial stage where synthesis exploration takes place. It's not directly connected to other blocks in the diagram, but it likely influences the RTL synthesis step.3. **RTL Synthesis**: The Register Transfer Level (RTL) synthesis is performed using tools like Yosys and abc. This step converts the high-level design description into a gate-level representation.4. **STA**: Static Timing Analysis (STA) is conducted using OpenSTA to ensure that the circuit meets the required timing specifications.5. **DFT**: Design for Test (DFT) is applied using a tool indicated as Fault. This step inserts testability features into the hardware design to make it easier to test the final chip for defects.6. **Floorplanning**: The floorplanning step involves defining the layout of the chip, including the placement of cores, I/O pads, and the power grid.7. **Placement**: After floorplanning, the placement step positions the individual standard cells within the defined floorplan regions.8. **CTS**: Clock Tree Synthesis (CTS) is the process of building a clock distribution network within the chip to ensure that all elements receive the clock signal with minimal skew.9. **Optimization**: This step involves making adjustments to the design to improve performance, power, and area (PPA) metrics.10. **Global Routing**: Global routing establishes the pathways for interconnects between the various components on the chip without defining the exact geometric paths.11. **Ant. Diodes Insertion**: Antenna diodes are inserted using custom scripts to prevent damage to transistors from charge accumulation during the fabrication process.12. **LEC**: Logic Equivalence Checking (LEC) is performed using Yosys to verify that the post-synthesis netlist is logically equivalent to the pre-synthesis netlist.13. **Detailed Routing**: TritonRoute is used for detailed routing, which defines the exact geometric paths for the interconnects on the chip.14. **RC Extraction**: Resistance and capacitance (RC) extraction is done (using DEF2SPEF), which is essential for accurate STA.15. **STA (again)**: STA is performed again using OpenSTA, likely after RC extraction, to ensure timing requirements are still met with the extracted parasitics.16. **gds2 Streaming**: The design is streamed out to a GDSII file using Magic, which is a standard format for IC design data exchange.17. **Physical Verification**: Physical verification is done using Magic and netgen to ensure the design meets all manufacturing rules and specifications.18. **Design Exploration**: This is likely an iterative step where the design is analyzed and refined based on the results of the previous steps.19. **Output Files**: The final output of the process is the GDSII and LEF files, which are used for chip fabrication.20. **SW PDK**: The Software Process Design Kit (SW PDK) is a library or database that provides the design rules, device models, and technology parameters used throughout the design process. It is referenced at various stages in the flow.The diagram shows a linear progression with feedback loops for optimization and verification, indicating an iterative process to refine the design until it meets all specifications and is ready for manufacturing."}}