Disableconstraints disable timing constraints

Tcl Commands for General Usage

analysis_name specifies the name of the analysis to delete.

Example: % timing_analysis delete stopwatch_timing

Description:	In this example, the timing_analysis delete command is used to
	remove the stopwatch_timing analysis, which was previously
	created with the timing_analysis new command.

Tcl Return:

0 if the analysis was deleted, 1 otherwise.

disable_constraints (disable timing constraints)

The timing_analysis disable_constraints command disables a physical timing constraint from the timing analysis.

timing_analysis disable_constraints <analysis_name> <timing_constraint_specs>

timing_analysis is the name of the Xilinx Tcl command.

disable_constraints is the name of the timing_analysis subcommand.

analysis_name specifies the name of an analysis created with the timing_analysis new command.

timing_constraint_specs specifies the names and specs to be disabled for analysis.

Example:	% timing_analysis disable_constraints
	stopwatch_timing “TS_clk=PERIOD
	TIMINGROUP\”sclk\”20 ns HIGH 50.00000%;”

Description:	In this example, the specified timing constraints were disabled for
	the analysis.

Tcl Return:

Number of constraints that were disabled.

disable_cpt (disable components for path tracing control)

The timing_analysis disable_cpt command disables components associated with a path tracing control for a timing path analysis.

%timing_analysis disable_cpt <analysis_name> <cpt_symbol> <component_name>

timing_analysis is the name of the Xilinx Tcl command.

disable_cpt is the name of the timing_analysis subcommand.

analysis_name specifies the name of the analysis generated previously with the timing_analysis new command.

cpt_symbol specifies a path tracing control that determines whether associated components are considered for the timing path analysis.

Development System Reference Guide

www.xilinx.com

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 Disableconstraints disable timing constraints

Models: 8.2i