Using synopsys design constraints sdc with designer this technical brief describes the commands and provides usage examples of synopsys design constraints sdc format with actels designer series software. Snug san jose 2009 3 consistent timing constraints with primetime unfortunately this doesnt work, due to differences amongst the tools. Synopsys spyglass cdc provides comprehensive, lownoise clock domain crossing verification for design anddebug cdc issues. The galaxy constraint analyzer is an intuitive tool that enables designers to quickly assess the correctness and consistency of timing constraints. Synopsys introduces galaxy constraint analyzer to improve. A standard file format, synopsys design constraint. Technical brief using synopsys design constraints sdc. You use constraints to ensure that your design meets its performance goals and pin assignment requirements. Cs250 tutorial 5 version 092509a september 25, 2009 yunsup lee. There is a toplevel edif netlist source file, as well as an xdc constraints file. Spyglass constraints verifies that existing constraints are correct and consistent early in the design flow. All commands in an sdc le conform to the tcl syntax rules. You can use the following types of sdc commands when creating sdc constraints for smartfusion2.
This page provides links to resources where you can learn more about the timing analyzer. Synopsys design compiler dc basic tutorial rtl design to gatelevel synthesis. This video walks through the steps from rtl design to logic synthesis and physical design using synopsys tools including the various steps involved in pd like floorplanning, p. By ensuring valid constraints, spyglass constraints can eliminate design. Introduction to synthesis timing static timing analysis 117 synopsys timing constraints and optimization user guide version d2010. In this tutorial you will gain experience using synopsys design compiler dc to perform hardware synthesis. Sdc is a widely used format that allows designers to utilize the same sets of constraints to drive synthesis, timing analysis, and. Using synopsys design constraints sdc with designer 4 additional notes synplifys synplicity also has provided the sdc forward constraint option, where the synthesis tool writes out this file as well as the synthesized netlist. File formats although most tools can use synopsys design constraints sdc format 1, some use tcl scripts not the same as sdc, and a. For this example, assume that the flipflops are defined in the technology library to have a minimum setup time of 1. The spyglass solution can trim weeks or more from design schedules by pinpointing the root cause of constraint problems. Synopsys design constraint sdc format is used to specify the design intent, including the timing and area constraints of the design. Cic training manual logic synthesis with design compiler, july, 2006 tsmc 0 18um process 1 8volt sagextm stand cell library databook september 2003 t. Synopsys design compiler synthesis lecture 20 youtube.
For more information, see this link in the ise to vivado design suite migration guide. Synopsys design compiler synthesis lecture 20 synthesis and cadence verilog import. Rtltogates synthesis using synopsys design compiler cs250 tutorial 5 version 091210b september 12, 2010 yunsup lee. Constraint based verification of clock domain crossings. A practical guide to synopsys design constraints sdc as.
Pdf file may point to external files and generate an error when clicked. A synthesis tool takes an rtl hardware description and a. Rtltogates synthesis using synopsys design compiler cs250 tutorial 5 version 092509a september 25, 2009 yunsup lee in this tutorial you will gain experience using synopsys design compiler dc to perform hardware synthesis. Synopsys design constraints sdc is a tcl based format used by synopsys tools to specify the design intent, including the timing and area constraints for a design. Tseng, ares lab 2008 summer training course of design compiler. Our design is synchronous in addition, we will only be showing how to deal with combinational elements and max delay constraints. Synopsys provides a library called design ware which includes highly optimized rtl for arithmetic. If you use any other version of the software, results may not exactly match the results in the tutorial, although you can still follow the. Chip this is your top level design name gds libraries if available for gds extraction. Sdc, is used to specify timing and other design con straints. By ensuring valid constraints, spyglass constraints can eliminate design flaws and costly respins.
In this tutorial we will use synopsys design compiler to elaborate rtl, set optimization constraints, synthesize to gates, and prepare various area and timing reports. The manual is divided into the following main sections. You will also learn how to read the various dc text reports and how to use the graphical synopsys design vision tool to visualize the synthesized design. Design constraints design constraints are usually either requirements or properties in your design.
Synthesize a behavioral 1bit full adder using the synopsys design compiler. Perform a simple conversion of ucf timing constraints to synopsys design constraint sdc equivalents and explored incremental static timing analysis reporting. Constraining designs for synthesis and timing analysis book. Sdc synopsys design constraints the rules that are written are referred to as constraints and are essential to meet designs goal in terms of area, timing and power to obtain the best possible implementation of a circuit. Actel tools use a subset of the sdc format to capture supported timing constraints. Pdf files are intended to be viewed on the printed page. In the later part important constraints of sdc file has been explained with the help of exact syntax and example of sdc commands. Xdc constraints are based on the standard synopsys design constraints. You can also learn more about defining constraints in the vivado design suite by. The timequest timing analyzer only implements the set of sdc commands required to specify the timing constraints of the design. Compare the area of synthesized netlist and scan inserted netlist. Automated synthesis from hdl models design compiler synopsys leonardo mentor graphics. In most instances, the vivado tools also support xilinx design constraints xdc, which is based on the industrystandard synopsys design constraints sdc. For example, suppose you write the following constraint.
Sdc file synopsys design constraints file various files in vlsi. You use constraints to ensure that your design meets its performance goals. All the information included in the quartus ii sdc and timequest api reference manual, as well as the most uptodate list of commands, can also be found in the. Sdc is a widely used format that allows designers to utilize the same sets of constraints to drive synthesis, timing. Synopsys design constraints sdc basics vlsi concepts. Synopsys dc ultra, or other hdl compiler top level design name. Using synopsys design constraints sdc with designer. Synopsys design compiler tutorial addendum to gwu tutorial for smu students t. For resources on the timing analyzer, see the following. This command includes the synopsys path into your current unix path.
The quartus ii sdc and timequest api reference manual is your reference guide to timequest timing analyzer constraints and commands, including command details, usage, and examples. Using synopsys design constraints sdc with designer digchip. Function function synthesis layout tape out rtl function timing prelayout postlayout function timing behavioral standard library constraints test vectors timing information specification rtl coding synopsys. Technical brief using synopsys design constraints sdc with designer this technical brief describes the commands and provides usage examples of synopsys design constraints sdc format with actels designer series software. Synthesis in synopsys design vision and placeandroute in cadence encounter duration. Adding constraints to your design is a process to make your design a bit more realistic than just simple gates. The synopsys ic compiler ii tool provides a complete netlisttogdsii design solution, which combines proprietary design planning, physical synthesis, clock tree synthesis, and routing for logical and physical design implementations throughout the design flow. Frontend design of digital integrated circuits ics. A practical guide to synopsys design constraints sdc gangadharan, sridhar, churiwala, sanjay on. A synthesis tool takes an rtl hardware description and a standard cell library as input and produces a gatelevel netlist as output. The following example shows how to use the comment option. Constraining designs for synthesis and timing analysis.
Note that this tutorial is by no means comprehensive. Actels designer can import this sdc file and timing driven place and route can be performed on the design. In the real world, gate delay is affected by many factors, such as gate type. Synopsys design compiler tutorial addendum to gwu tutorial. A synthesis tool takes an rtl hardware description and a standard cell library as input and producesa gatelevel netlist as output. We will assume a pintopin delay model in other words, each gate has a single, constant delay from input to output. Synopsys timing constraints and optimization user guide. Smartfusion2igloo2 fpga timing constraints for enhanced. Make sure you save at regular intervals during the design process. Copy the following files into your working directory. Physical design automation of vlsi systems georgia institute of technology prof. Create a folder named dft in the project folder s27 mkdir dft 2. Using the design compiler created at gwu by thomas farmer updated at gwu by william gibb, spring 2010. Send comments on the documentation by going to synopsys.
Rtltogates synthesis using synopsys design compiler. The constraints format supported by the vivado design suite is called xilinx design constraints xdc, which is a combination of the industry standard synopsys design constraints and proprietary xilinx constraints. Microsemi supports a variation of the sdc format for constraints management. Chapter 6 is a description of the design that will be synthesized and subsequently optimized. Vlsis hello world ee241 tutorial written by yunsup lee 2010 updated by brian zimmer 2011,20 overview for this tutorial, you will become familiar with the vlsi tools you will use throughout this semester and learn how a design \ ows through the tool ow. It assumes that you are familiar with the planahead tool graphical user interface gui and project flows. You can also learn more about defining constraints in the vivado design. Vprs default timing constraints are explained in default timing constraints. Rtltogates synthesis using synopsys design compiler 6. Invoking design compiler be sure you are in your tutorial directory before you invoke either of the following because the setup files are in this directory. Automated synthesis from hdl models auburn university. This document supplements the synopsys design compiler material originally developed by t. A practical guide to synopsys design constraints sdc.
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