Stamp Generates Stamp timing model files, Ulimit

TRACE Options

–stamp (Generates STAMP timing model files)

–stampstampfile design.ncd

When you specify the –stamp option, TRACE generates a pair of STAMP timing model files--stampfile.mod and stampfile.data--that characterize the timing of a design.

Note: The stamp file entry must precede the NCD file entry on the command line.

The STAMP compiler can be used for any printed circuit board when performing static timing analysis.

Methods of running TRACE with the STAMP option to obtain a complete STAMP model report are as follows:

•Run with advanced analysis using the –a option.

•Run using default analysis (with no constraint file and without advanced analysis).

•Construct constraints to cover all paths in the design.

•Run using the unconstrained path report (–u option) for constraints which only partially cover the design.

For either of the last two options, do not include TIGs in the PCF, as this can cause paths to be excluded from the model.

–u (Report Uncovered Paths)

–ulimit

The –u option reports delays for paths that are not covered by timing constraints. The option adds an unconstrained path analysis constraint to your existing constraints. This constraint performs a default path enumeration on any paths for which no other constraints apply. The default path enumeration includes circuit paths to data and clock pins on sequential components and data pins on primary outputs.

The optional limit argument limits the number of unconstrained paths reported for each timing constraint in the report file. The value of limit must be an integer from 1 to 2,000,000,000 (2 billion) inclusive. If a limit is not specified, the default value is 3.

Development System Reference Guide

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8.2i specifications

Xilinx 8.2i is a significant version of the Xilinx ISE (Integrated Software Environment) that emerged in the early 2000s, marking an important milestone in the world of FPGA (Field-Programmable Gate Array) development. This version introduced a slew of advanced features, technologies, and characteristics that made it an indispensable tool for engineers and developers in designing, simulating, and implementing digital circuits.

One of the standout features of Xilinx 8.2i is its enhanced design entry capabilities. This version supports multiple design entry methods, including schematic entry, VHDL, and Verilog HDL, giving engineers the flexibility to choose their preferred approach. The integrated environment provides user-friendly graphical interfaces, making it accessible for both novice and experienced users.

Xilinx 8.2i's synthesis tools have been improved to enable more efficient design compilation and optimization. The new algorithms used in this version facilitate faster synthesis times while reducing power consumption and improving performance. Furthermore, it features support for advanced FPGA architectures, which allows for the implementation of more complex designs with greater efficiency.

The implementation tools in Xilinx 8.2i include advanced place and route capabilities, utilizing state-of-the-art algorithms for optimized resource usage. These tools enable designers to make better use of FPGA resources, ensuring that designs fit within the constraints of the target device while maximizing performance.

Another key characteristic of Xilinx 8.2i is its extensive support for various Xilinx devices such as the Spartan, Virtex, and CoolRunner series. This compatibility ensures that developers can leverage the powerful features of these FPGA families, including high-speed transceivers and DSP slices.

Xilinx 8.2i also places a strong emphasis on simulation and verification. The version integrates with various simulation tools, allowing for thorough testing of the designs before implementation. This reduces the risk of errors and ensures that the final product meets specifications.

In addition, this version includes support for design constraints, enabling engineers to specify timing, area, and other critical design parameters. By accommodating constraints, Xilinx 8.2i helps in achieving reliable and efficient designs tailored to project needs.

In summary, Xilinx 8.2i is a robust software development tool that enhances the design process for FPGAs. Its comprehensive features, including multiple design entry options, advanced synthesis and implementation tools, extensive device support, and strong simulation capabilities, make it a valuable resource for engineers and developers striving for innovation in digital design.

Xilinx 8.2i manual Stamp Generates Stamp timing model files, Report Uncovered Paths, Ulimit

Models: 8.2i