Fit Fit a Cpld | Xilinx 8.2i guide

XFLOW Flow Types

Xilinx provides the following option files for use with this flow type.

Table 23-5:Option Files for –ecn Flow Type

Option Files	Description

conformal_verilog.opt	Option file for equivalence checking
	for conformal

formality_verilog.opt	Option file for equivalence checking
	for formality

–fit (Fit a CPLD)

–fitoption_file

This flow type incorporates logic from your design into physical macrocell locations in a CPLD. It invokes the cpld.flw flow file and runs NGDBuild and CPLDfit to create a JED file.

Xilinx provides the following option files for use with this flow type. These files allow you to optimize your design based on different parameters.

Table 23-6:Option Files for –fit Flow Type

Option Files	Description

balanced.opt	Optimized for a balance between
	speed and density

speed.opt	Optimized for speed

density.opt	Optimized for density

The following example shows how to use a combination of flow types to fit a design and generate a VHDL timing simulation netlist for a CPLD.

xflow -p xc2c64-4-cp56 -fit balanced.opt -tsim generic_vhdl.opt main_pcb.edn

–fsim (Create a File for Functional Simulation)

–fsimoption_file

Note: The –fsim flow type can be used alone or with the –synth flow type. It cannot be combined with the –implement, –tsim, –fit, or –config flow types.

This flow type generates a file that can be used for functional simulation of an FPGA or CPLD design. It invokes the fsim.flw flow file and runs NGDBuild and NetGen to create a func_sim.edn, func_sim.v, or func_sim.vhdl file. This file contains a netlist description of your design in terms of Xilinx simulation primitives. You can use the functional simulation file to perform a back-end simulation with a simulator.

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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 Fit Fit a Cpld, Fsim Create a File for Functional Simulation

Models: 8.2i