R

timing simulation

This type of simulation takes place after the HDL design has been synthesized and placed and routed. The purpose of this simulation is to check the dynamic timing behavior of the HDL design in the target technology.

Use the block and routing delay information from the routed design to assess the circuit behavior under worst-case conditions.

timing specifications

Timing specifications define the maximum allowable delay on any given set of paths in a design. Timing specifications are entered on the schematic.

TRACE

Provides static timing analysis of a design based on input timing constraints.

trace information

Trace information is a list of nodes and vectors to be simulated in functional and timing simulation. This information is defined at the schematic level.

transistor

Atransistor is a three-terminal semiconductor device that switches or amplifies electrical current. It acts like a switch: On is equal to 1, and Off is equal to 0.

trimming

Trimming is the process of removing unconnected or unused logic.

tristate (3-state)

A3-state, or 3-state buffer, is a buffer that places an output signal in a high-impedance state to prevent it from contending with another output signal.

tristate (3-state) condition

A3-state condition is a high-impedance state. A 3-state can act also as a normal output; i.e. it can be on, off, or not connected.

truth table

A truth table defines the behavior for a block of digital logic. Each line of a truth table lists the input signal values and the resulting output value.

TSIM

A program that formats implemented CPLD design (VM6) files into a format usable by the NetGen timing simulation flow.

Development System Reference Guide

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Xilinx 8.2i manual Trace, Tsim
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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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