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Xilinx 8.2i manual Select I/O Utilization and Usage Summary, Importing the PAD File Information

Models: 8.2i

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Multi Pass Place and Route (MPPR)

One strategy for using MPPR is to set the placer effort level to high and router effort level to std to ensure a quality placement and a quick route. This strategy enables PAR to run the cost tables effectively and reduces the total runtime of all place and route iterations.

When a design is very close to reaching its timing goals and can run for a long period through all the cost tables, another strategy is to use the following:

par –n 0 -ol high, -xe n address.ncd output.dir

Select I/O Utilization and Usage Summary

If more than one Select I/O standard is used, an additional section on Select I/O utilization and usage summary is added to the PAR file. This section shows details for the different I/O banks. It shows the I/O standard, the output reference voltage (VCCO) for the bank, the input reference voltage (VREF) for the bank, the PAD and Pin names. In addition this section gives a summary for each bank with the number of pads being used, the voltages of the VREFs, and the VCCOs.

Importing the PAD File Information

The PAD (pad and _pad.csv) reports are formatted for importing into a spreadsheet program such as Microsoft® Excel, or for parsing via a user script. The _pad.csv file can be directly opened by Microsoft Excel. The procedure for importing a .pad file into Microsoft Excel is as follows:

1.In Excel, select the menu File → Open.

2.In the Open dialog box, change the Files of type field to All Files (*.*)” Browse to the directory containing your .pad file. Select the file so it appears in the File name field. Select the Open button to close the Open dialog box.

3.The Excel Text Import Wizard dialog appears. In the Original data type group box, select Delimited. Select the Next button to proceed.

4.In the Delimiters group box, uncheck the Tab checkbox. Place a check next to Other and enter a character into the field after Other. The symbol is located on the keyboard above the Enter key.

5.Select the Finish button to complete the process.

You can then format, sort, print, etc. the information from the PAD file using spreadsheet capabilities as required to produce the necessary information.

Note: This file is designed to be imported into a spreadsheet program such as Microsoft Excel for viewing, printing, and sorting.The ”” character is used as the data field separator. This file is also designed to support parsing.

Guide Reporting

For guided PAR, the PAR report displays summary information describing the total amount and percentage of components and signals in the input design guided by the reference design. The report also displays the total/percentage of components and signals from the reference design (guide file) that were used to guide the input design.

The guide report, which is included in the PAR report file, is generated with the -gf option. The report describes the criteria used to select each component and signal used to guide the design. It may also enumerate the criteria used to reject some subset of the components and signals that were eliminated as candidates. See the Guided PAR section of this chapter for more information on using guide files.

Development System Reference Guide

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Xilinx 8.2i manual Select I/O Utilization and Usage Summary, Importing the PAD File Information, Guide Reporting
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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.