Cpld, Daisy chain, Dangling bus, Dangling net

CPLD

Complex Programmable Logic Device (CPLD). Is an erasable programmable logic device that can be programmed with a schematic or a behavioral design. CPLDs constitute a type of complex PLD based on EPROM or EEPROM technology. They are characterized by an architecture offering high speed, predictable timing, and simple software.

The basic CPLD cell is called a macrocell, which is the CPLD implementation of a CLB. It is composed of AND gate arrays and is surrounded by the interconnect area.

CPLDs consume more power than FPGA devices, are based on a different architecture, and are primarily used to support behavioral designs and to implement complex counters, complex state machines, arithmetic operations, wide inputs, and PAL crunchers.

CPLDfit

A program that reads in an NGD file and fits the design into the selected CPLD architecture.

daisy chain

A daisy chain is a series of bitstream files concatenated in one file. It can be used to program several FPGAs connected in a daisy chain board configuration.

dangling bus

A dangling bus connects to a component pin or net at one end and unconnects at the other. A small filled box at the end of the bus indicates a dangling bus.

dangling net

A dangling net connects to a component pin or net at one end and unconnects at the other. A small filled box at the end of the net indicates a dangling net.

Data2MEM

A program that transforms CPU execution code, or pure data, into

Block RAM initialization records.

debugging

Debugging is the process of reading back or probing the states of a configured device to ensure that the device is behaving as expected while in circuit.

Development System Reference Guide

www.xilinx.com

401

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 Cpld, Daisy chain, Dangling bus, Dangling net, Debugging

Models: 8.2i