Jedec

instance

An instance is one specific gate or hierarchical element in a design or netlist. The term "symbol" often describes instances in a schematic drawing. Instances are interconnected by pins and nets. Pins are ports through which connections are made from an instance to a net. A design that is flattened to its lowest level constituents is described with primitive instances.

instantiation

Instantiation is the act of placing a symbol that represents a primitive or a macro in a design or netlist.

Integrated Synthesis Environment (ISE)

ISE is an integrated tool suite that enables you to produce, test, and implement designs for Xilinx FPGAs or CPLDs.

interconnect

Interconnect is the metal in a device that is used to implement the nets of the design.

interconnect line

An interconnect line is any portion of a net.

IOB (input/output block)

An IOB is a collection or grouping of basic elements that implement the input and output functions of an FPGA device.

I/O pads

I/O pads are the input/output pads that interface the design logic with the pins of the device.

JEDEC is a CPLD file format used for downloading device bitmap information to a device programmer.

latch

A latch is a two-state buffer fed by two inputs, D and L. When the L input is Low, it acts as a transparent input; in this case, the latch acts as a buffer and outputs the value input by D. When the L input is High, it ignores the D input value.

Development System Reference Guide

www.xilinx.com

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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.

Xilinx 8.2i manual Jedec

Models: 8.2i