Libraries to Search, Part Number, Llibname

EDIF2NGD

–l (Libraries to Search)

–llibname

The –l option specifies a library to search when determining what library components were used to build the design. This information is necessary for NGDBuild, which must determine the source of the design’s components before it can resolve the components to Xilinx primitives.

You may specify multiple –l options on the command line. Each must be preceded with – l; you cannot combine multiple libname specifiers after one –l. For example, –l xilinxun synopsys is not acceptable, while –l xilinxun –l synopsys is acceptable.

The allowable entries for libname are the following.

•xilinxun (For Xilinx Unified library)

•synopsys

Note: You do not have to enter xilinxun with a –l option. The Xilinx Development System tools automatically access these libraries. You do not have to enter synopsys with a –l option if the EDIF netlist contains an author construct with the string “Synopsys.” In this case, EDIF2NGD automatically detects that the design is from Synopsys.

–p (Part Number)

–ppart

The –p option specifies the part into which your design is implemented. The –p option can specify an architecture only, a complete part specification (device, package, and speed), or a partial specification (for example, device and package only).

The syntax for the –p option is described in “–p (Part Number)” in Chapter 1. Examples of part entries are XCV50-TQ144and XCV50-TQ144-5.

If you do not specify a part when you run EDIF2NGD, you must specify one when you run NGDBuild.

You can also use the –p option to override a part name in the input EDIF netlist or a part name in an NCF file.

–r (Ignore LOC Constraints)

The –r option filters out all location constraints (LOC=) from the design. If the output file already exists, it is overwritten with the new file.

Development System Reference Guide

www.xilinx.com

383

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 Libraries to Search, Part Number, Ignore LOC Constraints, Llibname

Models: 8.2i