R

TTL

TTL, or transistor-transistor logic, is a technology with specific interchange (communication of digital signals) voltages and currents. Other technologies include ECL, MOS, and CMOS. These types of logic are used as criteria to classify digital integrated circuits.

U

unbonded

Unbonded describes an IOB used for internal logic only. This element does not have an external package pin.

Unified Libraries

A set of logic macros and functions that are used to define the logic of a design. The elements are compatible across families and schematic and HDL editors.

V

VCC pin

The VCC pin is Power (5 volts). It is the supply voltage.

verification

Verification is the process of reading back the configuration data of a device and comparing it to the original design to ensure that all of the design was correctly received by the device.

Verilog

Verilog is a commonly used Hardware Description Language (HDL) that can be used to model a digital system at many levels of abstraction ranging from the algorithmic level to the gate level. It is IEEE standard 1364-1995. Verilog was originally developed by Cadence Design Systems and is now maintained by OVI.

A Verilog file has a .v extension.

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www.xilinx.com

Development System Reference Guide

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Xilinx 8.2i manual Ttl
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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.
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