Chapter 11: PIN2UCF

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PIN2UCF Options

This section describes the PIN2UCF command line options.

–o (Output File Name)

–o outfile.ucf

By default (without the –o option), PIN2UCF writes an ncd_file.ucf file. The –o option specifies the name of the output UCF for the design. You can use the –o option if the UCF used for the design has a different root name than the design name. You can also use this option to write the pin-locking constraints to a UCF with a different root name than the design name, or if you want to write the UCF to a different directory.

–r (Write to a Report File)

–rreport_file_name.rpt

By default (without the –r option), a pinlock.rpt file is automatically written to the current directory. The –r option writes the PIN2UCF report into the specified report file.

PIN2UCF Scenarios

The following table lists scenarios for the PIN2UCF program.

Table 11-1:PIN2UCF Scenarios

Scenario

PIN2UCF Behavior

Files Created or

Updated

 

 

 

 

 

No UCF is present.

PIN2UCF creates a UCF and writes

pinlock.rpt

 

the pin-locking constraints to the

design_name.ucf

 

UCF.

 

 

 

 

 

UCF is present.

PIN2UCF appends the pin-locking

pinlock.rpt

 

constraints in the PINLOCK section

design_name.ucf

 

to the end of the file.

There are no pin-locking

 

 

 

constraints in the UCF, or

 

 

this file contains some

 

 

user-specified pin-locking

 

 

constraints outside of the

 

 

PINLOCK section.

 

 

None of the user-specified

 

 

constraints conflict with the

 

 

PIN2UCF generated

 

 

constraints.

 

 

 

 

 

208

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Development System Reference Guide

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Xilinx 8.2i manual PIN2UCF Options, PIN2UCF Scenarios, Write to a Report File, Outfile.ucf
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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.
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