Spartan-3A DSP

In embedded systems, designers can reduce component count and increase flexibility by using a microprocessor to configure an FPGA. C code illustrates the use of either Slave Serial or SelectMAP mode. CPLD design files illustrate a synchronous interface between processor and FPGA.

This application note describes a full-featured transmitter/receiver macro that can communicate with Spartan® and Virtex® FPGA families via the Analog Devices ADSP-TS101S TigerSHARC™ link-port function.

This application note describes a reference design that adds fail-safe mechanisms to the MultiBoot capabilities of the Extended Spartan®-3A family of FPGAs. The reference design configures specific FPGA logic via an initial bitstream that determines which application to load.

This application note describes how to indirectly program an SPI Serial Flash PROM through the JTAG interface of a Spartan®-3A FPGA using iMPACT 9.1.01i. The hardware setup, software flows for file generation, and programming are also covered.

The PCI™ Local Bus Specification defines a number of power and reset requirements. When considered in an FPGA implementation, these create several challenges that must be addressed for long term reliability and broad interoperability. This application note applies to compliant PCI applications using Spartan™-3 Generation FPGAs, and is relevant to other Xilinx FPGA families, as well as related PCI applications.

The J Drive programming engine provides immediate and direct in-system configuration (ISC) support for IEEE Standard 1532 programmable logic devices (PLDs). To configure an in-system device, the programming engine uses the configuration algorithm information from a 1532 Boundary Scan Description Language (BSDL) file to apply configuration data from the 1532 data file through the IEEE Standard 1149.1 test access port (TAP). The J Drive executable, source code, and a programming example are available in a download package from the Xilinx website. The J Drive programming engine can be used for the following Xilinx families: CoolRunner-II CPLDs, XC9500/XL/XV CPLDs, Spartan-3 Generation FPGAs, and Virtex-II (and later) series FPGAs.

This Application Note describes the feature of Platform Flash PROMs that allows the user to Multiple-Boot or dynamically reconfigure from up to four Design Revisions.

Describes how Extended Spartan®-3A family and Spartan-3E FPGAs work in spread-spectrum applications.

This application note demonstrates how to efficiently implement Digitial Up and Down Converters(DUC/DDC) by leveraging the Xilinx DSP IP portfolio. Two example DUC/DDC designs are provided for UMTS and CDMA2000 in both Spartan™-DSP and Virtex™-5 FPGAs.

This application note describes solutions to receive large-swing signals by design. In one solution (and in the general case of severe positive and/or negative overshoot), parasitic leakage current between User I/O in differential pin pairs may occur, even though the User I/O pins are configured with single-ended I/O standards. This application note addresses the parasitic leakage current behavior.

This Application Note describes a set of reference designs that can transmit and receive DVI or HDMI data streams up to 750 Mb/s using the native TMDS I/O featured by Spartan®-3A FPGAs.

The Xilinx high-performance CPLD, FPGA, and configuration PROM families provide in-system programmability, reliable pin locking, and JTAG boundary-scan test capability. This powerful combination of features allows designers to make significant changes and still keep the original device pin-outs, which eliminates the need to re-tool PC boards.

This application note shows the connection of Xilinx® FPGAs to a Texas Instruments™ S320C6000 series Digital Signal Processor (DSP) using the available External Memory Interface (EMIF).

This application note explains how to use the Xilinx Viterbi Decoder LogiCORE™ module (version 5.0 or later) to implement both trellis termination and tail biting.

This application note discusses the use of Partitions in the Incremental Design Flow. It is recommended that module instances with high logic density, timing critical paths, or timing critical module instances be designated Partitions.

This application note describes the implementation of a two-dimensional Rank Order filter. The reference design includes the RTL VHDL implementation of an efficient sorting algorithm.

This application note describes a system for accelerating BER measurements.

Differential signals, such as LVDS or LVPECL, can be difficult to route on simple, four-layer or six-layer PCBs without excessive use of vias. This application note shows how Spartan™-3 Generation FPGAs, with just the inclusion of an inverter in the datapath, can avoid excessive use of vias and fix accidental PCB trace swapping without requiring a PCB respin.

XAPP482 describes a working MicroBlaze™ system that stores software code, user data, and configuration data in non-volatile Platform Flash PROMs, simplifying system design and reducing cost. It provides a portable hardware design, software design, and additional script utilities to be used during the implementation flow.

The Spartan-3A/3AN/3A DSP FPGA families offer an advanced static power management feature called Suspend mode, which reduces FPGA power consumption while retaining the FPGA’s configuration data and maintaining the application state. The device can quickly enter and exit Suspend mode as required in an application.

Ground bounce must be controlled to ensure proper operation of high performance FPGA devices. Particular attention must be applied to minimizing board-level inductance during PCB layout. This document describes calculations that help to ensure that a design meets input undershoot and logic-low voltage requirements for devices receiving signals from an FPGA.

This application note targets Spartan™-3E devices in applications that require 4-bit or 5-bit transmit data bus widths and operate at rates up to 666 Mbps per line with a forwarded clock at 1/7th the bit rate. This type of interface is commonly used in flat panel displays and automotive applications.

This application note targets Spartan®-3E/3A devices in applications that require 4-bit or 5-bit receive data bus widths and operate at rates up to 666 Mbps per line with a clock at 1/7th the bit rate. This type of interface is commonly used in flat panel displays and automotive applications.

The PCI specification defines two I/O timing budgets for use with 33 MHz and 66 MHz operation. In embedded designs, custom timing budgets enable the following: • Reduce total system cost by using less expensive devices • Achieve higher data transfer rates than allowed by specification • Add more loads to the bus to accommodate additional devices and connectors • Increase the physical length of the bus to accommodate novel bus topologies The information presented in this application note is applicable to any embedded PCI implementation using Xilinx FPGA devices.

This application note outlines how to successfully configure a Spartan™-3A FPGA from a Platform Flash PROM. Including hardware requirements and software flows for generating and programming PROM files.

This application note covers the principles of power distribution systems and bypass or decoupling capacitors. A step-by-step process is described where a power distribution system can be designed and verified. The final section discusses additional sources of power supply noise and provides resolutions.

The DDR2-400 (200 MHz clock) memory interface discussed in this application note is derived from the default output of MIG. Xilinx has validated this interface in Spartan®-3A FPGAs with the higher speed grade (-5) assembled on Spartan-3A Starter Kits. The validation results also apply to Spartan-3AN and Spartan-3A DSP FPGAs.

This white paper covers the different kinds of IIR filters and structures, and, with the use of The MathWorks® tools, shows how these structures can be mapped to the Xilinx® FPGA architecture.

This white paper identifies the top design security threats, explores the advanced security options, and describes how new, low-cost Spartan™-3A, Spartan-3AN, and Spartan-3A DSP FPGAs from Xilinx can help protect your products and profits.

Custom DSP algorithms are best modeled mathematically using MATLAB®, while complete systems are best modeled cycle-accurately using Simulink. The marriage of these two modeling domains provides an efficient means to design DSP systems into FPGAs.

The AccelDSP Synthesis Tool offers great benefits in automation, acceleration, and visualization when converting algorithms into a fixed-point model for implementation on an FPGAs.

This white paper reviews the potential inaccuracies associated with the traditional one-resistor approach to selecting heatsinks, and suggests a more accurate two-resistor (2-R) approach based on both theta-jc and theta-jb from the device datasheet.

FPGAs can be configured with test applications during the development and production test stage. This white paper explores efficient options to help in product development and accelerate testing on the production line.

Operating logic at a higher rate than the processing rate allows operations to be achieved sequentially. As with a processor, logic is timeshared over multiple clock cycles. Memory holds values not being used on a given clock cycle. The FPGA can be considered to be a three-dimensional volume to be filled. "Performance + Time = Memory" is a strange formula, but when understood, it can often result in significantly lower cost implementations with Xilinx devices.

This white paper examines the causes of jitter, jitter measurement techniques, and methods of managing jitter in digital systems.

This white paper describes design techniques that improve signal integrity in Xilinx® FPGAs.

This white paper defines the use and limitations of bit error ratio measurements when analyzing the performance of communications links.

This white paper discusses the FPD market and looks in closer detail at Plasma Display Panels and Liquid Crystal Displays in particular. An overview of where Xilinx devices fit in digital video systems is followed by a market overview of the flat panel display industry. The value proposition for Xilinx devices is presented, followed by a detailed discussion of the relationship of product features and resources to FPD system requirements.

This white paper discusses the various memory interface controller design challenges and Xilinx solutions, including how to use the Xilinx software tools and hardware-verified reference designs to build a complete memory interface solution for your own application, from low-cost DDR SDRAM applications to higher-performance interfaces like the 667Mb/s DDR2 SDRAMs.

This document provides a concise overview of the subset of the MATLAB language, including operators, as well as built-in and toolbox functions supported by AccelDSP™ Synthesis Tool for algorithmic synthesis targeting Xilinx FPGAs.

This white paper identifies the top design security threats, explores the basic levels of security, and describes how new, low-cost Spartan®-3A, Spartan-3AN, and Spartan-3A DSP FPGAs from Xilinx can help protect your products and profits.

The M2C-Accelerator extends the Xilinx AccelDSP™ Model-Based Design solution by converting floating-point MATLAB to fixed-point C++ for accelerated MBD verification eliminating a potential bottleneck.

AccelDSP™ Synthesis Tool with IP-Explorer technology eliminates the trial-and-error from using IP blocks by allowing the tool automatically to select from various macro-architectures.

FPGAs have been used in DSP applications for years; more recently FPGAs have been emerging as ideal co-processors for standard DSP devices. FPGAs provide tremendous computational throughput by using highly parallel architectures, and are hardware reconfigurable, allowing the designer to develop customized architectures for ideal implementation of their algorithms. The new generation of FPGAs developed using 90-nm process technology provide the designer with an even more cost-effective solution. This white paper takes a look at some common high-performance DSP functions and calculates their effective implementation costs.

Applying a global reset to your FPGA designs is not a very good idea and should be avoided. This is a controversial issue, so this white paper looks at the reasons why such a design policy should be considered.

This white paper defines IBIS models and describes how to use them to model I/O characteristics for Xilinx® FPGAs.

This white paper examines alternate uses of available block RAM in Virtex® and Spartan® FPGAs.

This White Paper describes how Spartan®-3 FPGAs can reduce total system cost by up to 50% compared to competing FPGAs.

This white paper examines how to remove the DC content from a digitally sampled waveform using DSP without complicated mathematics.

This white paper describes the steps necessary to analyze your design's power requirements using the Xilinx® Power Estimator.

This white paper describes a rarely noticed design technique that can make a difference in the size and the performance of your FPGA design. Control signals on FPGA flip-flops have a built-in priority. If you can learn to write code that is sympathetic to the priorities, the results will be rewarding. This white paper provides some simple VHDL and Verilog examples to explain key points.

This white paper provides examples to help your understanding of the capabilities and use of the SRL16E to improve the performance and lower the cost of your designs by as much as an order of magnitude.

This white paper discusses signal analysis requirements and methods for printed circuit board design for Xilinx® FPGAs.

This white paper considers a variety of ways in which multiplexers can be implemented within Xilinx FPGA devices, including some alternative techniques that can lead to more efficient and lower cost implementations.