Gate array, Global buffers, Global Set/Reset net

gate array

A gate array is part of the ASIC chip. A gate array represents a certain type of gate repeated all over a VLSI-type chip. This type of logic requires the use of masks to program the connections between the blocks of gates.

global buffers

Global buffers are low-skew, high-speed buffers that connect to long lines. They do not map logic.

There is one BUFGP and one BUFGS in each corner of the chip. Primary buffers must be driven by an IOB. Secondary buffers can be driven by internal logic or IOBs.

global Set/Reset net

Aglobal Set/Reset net is a high-speed, no-skew dedicated net, which reduces delays and routing congestion. This net accesses all flip-flops on the chip and can reinitialize all CLBs and IOBs.

global 3-state net

A global 3-state net is a net that forces all device outputs to high- impedance state unless boundary scan is enabled and executes an EXTEST instruction.

GND pin

The GND pin is Ground (0 volts).

group

A group is a collection of common signals to form a bus. In the case of a counter, for example, the different signals that produce the actual counter values can be combined to form an alias, or group.

guide file

A guide file is a previously placed and routed NCP file that can be used in a subsequent place and route operation.

guided design

Guided design is the use of a previously implemented version of a file for design mapping, placement, and routing. Guided design allows logic to be modified or added to a design while preserving the layout and performance that have been previously achieved.

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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 Gate array, Global buffers, Global Set/Reset net, Global 3-state net, GND pin, Group

Models: 8.2i