Xilinx Synthesis Technology User Guide

About This Manual
Manual Contents
This manual describes Xilinx Synthesis Technology (XST) support for
HDL languages, Xilinx devices, and constraints for the ISE software.
The manual also discusses FPGA and CPLD optimization techniques
and explains how to run XST from the Project Navigator Process
window and command line.
This manual contains the following chapters and appendixes.
• Chapter 1, “Introduction,” provides a basic description of XST
and lists supported architectures.
• Chapter 2, “HDL Coding Techniques,” describes a variety of
VHDL and Verilog coding techniques that can be used for
various digital logic circuits, such as registers, latches, tristates,
RAMs, counters, accumulators, multiplexers, decoders, and
arithmetic operations. The chapter also provides coding
techniques for state machines and black boxes.
• Chapter 3, “FPGA Optimization,” explains how constraints can
be used to optimize FPGAs and explains macro generation. The
chapter also describes Virtex primitives that are supported.
• Chapter 4, “CPLD Optimization,” discusses CPLD synthesis
options and the implementation details for macro generation.
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