Tcl

state

A state is the set of values stored in the memory elements of a device (flip-flops, RAMs, CLB outputs, and IOBs) that represent the state of that device at a particular point of the readback cycle. To each state there corresponds a specific set of logical values.

state machine

A state machine is a set of combinatorial and sequential logic elements arranged to operate in a predefined sequence in response to specified inputs. The hardware implementation of a state machine design is a set of storage registers (flip-flops) and combinatorial logic, or gates.

The storage registers store the current state, and the logic network performs the operations to determine the next state.

static timing analysis

A static timing analysis is a point-to-point delay analysis of a design network.

TAEngine

A program that performs static timing analysis on a successfully implemented Xilinx CPLD design (VM6).

Tool Command Language (Tcl) is an easy to use scripting language and an industry standard popular in the electronic design automation (EDA) industry.

TEKHEX (Tektronix)

TEKHEX (Tektronix) is a PROM format supported by Xilinx. Its maximum address is 65 536. This format supports PROM files of up to (8 x 65 536) = 524 288 bits.

testbench

An HDL netlist containing test vectors to drive a simulation.

threshold

The threshold is the crossover point when something occurs or is observed or indicated. The CMOS threshold and TTL threshold are examples.

timing

Timing is the process that calculates the delays associated with each of the routed nets in the design.

418

www.xilinx.com

Development System Reference Guide

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 Tcl

Models: 8.2i