R

PAR Options

Table 9-2:General Options

 

Option

 

Function

 

Range

 

Default

 

 

 

 

 

 

 

 

 

 

 

 

–nopad

 

Suppresses the creation of the

 

N/A

 

Generate all

 

 

 

 

PAD files in all three formats

 

 

 

PAD files

 

 

 

 

 

 

 

 

 

 

 

 

–p

 

Do not run the Placer

 

N/A

 

Run Placement

 

 

 

 

 

 

 

 

 

 

 

 

–power

 

Power Aware PAR

 

N/A

 

Off

 

 

 

 

 

 

 

 

 

 

 

 

r

 

Do not run the Router

 

N/A

 

Run Router

 

 

 

 

 

 

 

 

 

 

 

 

ub

 

Use bonded IOB sites for

 

N/A

 

Do not use

 

 

 

 

unbonded IOBs

 

 

 

bonded IOB

 

 

 

 

 

 

 

 

 

sites

 

 

 

 

 

 

 

 

 

 

 

 

wexisting_file

 

Overwrite existing output files

 

N/A

 

Do not

 

 

 

 

that have the same name and

 

 

 

overwrite

 

 

 

 

path

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

x

 

Ignore any timing constraints

 

N/A

 

Use timing

 

 

 

 

provided and generate new

 

 

 

constraints if

 

 

 

 

timing constraints on all internal

 

 

present or use

 

 

 

 

clocks. Adjust these constraints

 

 

Automatic

 

 

 

 

while PAR is running to focus on

 

 

Timespecing if

 

 

 

 

either performance or run time

 

 

 

no timing

 

 

 

 

based on effort level setting.

 

 

 

constraints are

 

 

 

 

 

 

 

 

 

given

 

 

 

 

 

 

 

 

 

 

 

Table 9-3:Guide Options

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Option

 

Function

 

Range

 

Default

 

 

 

 

 

 

 

 

–gf

Specifies the name of a NCD

 

N/A

 

No guide file is

 

 

 

file to be used as the guide file

 

 

 

 

used

 

 

 

for PAR

 

 

 

 

 

 

 

 

 

 

 

 

 

–gm

Selects the mode of guide to

 

exact,

 

Exact

 

 

 

use during Place and Route

 

leverage,

 

 

 

 

 

 

 

 

incremental

 

 

 

 

 

 

 

 

 

 

 

 

 

Development System Reference Guide

www.xilinx.com

167

Page 167
Image 167
Xilinx 8.2i manual PAR Options 2General Options Function Range Default, Existingfile, Guide Options Function Range Default

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.

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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.

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