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Xilinx 8.2i manual DRC Checks, Report Incomplete Programming

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DRC Checks

–z (Report Incomplete Programming)

The –z option reports incomplete programming as errors. Certain DRC violations are considered errors when the DRC runs as part of the BitGen command but are considered warnings at all other times the DRC runs. These violations usually indicate the design is incompletely programmed (for example, a logic cell has been only partially programmed or a signal has no driver). The violations create errors if you try to program the device, so they are reported as errors when BitGen creates a BIT file for device programming. If you run DRC from the command line without the –z option, these violations are reported as warnings only. With the –z option, these violations are reported as errors.

DRC Checks

Physical DRC performs the following types of checks:

•Net check

This check examines one or more routed or unrouted signals and reports any problems with pin counts, 3-state buffer inconsistencies, floating segments, antennae, and partial routes.

•Block check

This check examines one or more placed or unplaced components and reports any problems with logic, physical pin connections, or programming.

•Chip check

This check examines a special class of checks for signals, components, or both at the chip level, such as placement rules with respect to one side of the device.

•All checks

This check performs net, block, and chip checks.

When you run DRC from the command line, it automatically performs net, block, and chip checks.

In the FPGA Editor, you can run the net check on selected objects or on all of the signals in the design. Similarly, the block check can be performed on selected components or on all of the design’s components. When you check all components in the design, the block check performs extra tests on the design as a whole (for example, 3-state buffers sharing long lines and oscillator circuitry configured correctly) in addition to checking the individual components. In the FPGA Editor, you can run the net check and block check separately or together.

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Xilinx 8.2i manual DRC Checks, Report Incomplete Programming
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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.