Virtex-5 Application Notes

This application note provides a reference design for endpoint-initiated Direct Memory Access (DMA) data transfers using the LogiCORE™ Endpoint Block Plus for Virtex®-5 FPGAs.

This application note describes how to interface a Fujitsu MB86064 digital-to-analog converter(DAC) with parallel low-voltage differential signaling (LVDS) inputs to a Virtex®-5 FPGA utilizing the dedicated I/O functions of the FPGA family.

This application note describes how to indirectly program select BPI PROMs through the JTAG interface of a Virtex™-5 FPGA using iMPACT. The required hardware setup, BPI-UP PROM file generation, and the indirect programming flow are described.

This application note describes a system using the Virtex™-5 Embedded Tri-Mode Ethernet MAC (Ethernet MAC) Wrapper core on a Xilinx Virtex-5 ML505 development board.

Describes the hardware accelerator for RAID6 parity generation / data recovery controller with ECC and MIG DDR2 controller.

Hot-swapping or hot insertion describes a potentially dangerous method of inserting an unpowered board into a power-on (hot) running system. There are several concerns: the insertion must not cause physical harm or permanent damage to the system or the inserted board, and the insertion must not cause data corruption or any transient system upsets. This application note describes the physical aspects of hot-inserting a Virtex™-II based card into a system or system backplane, using sequenced connectors, where VCC and GND mate well before any signal pins can mate. The dangers of using normal non-sequenced connectors are described in Hot Plug-In. Not addressed in this application note are system issues including detecting the presence or absence of a card, or how the card is accepted in the system.

On-die termination (ODT) promises higher signaling rates for printed circuit board (PCB) inter-chip interfaces through improved signal integrity. However, when using ODT, there is sometimes an associated power penalty. This application note explains the reason for the power penalty and suggests a simulation technique for comparing the signal integrity and power dissipation of internally and externally terminated versions of an interface.

Virtex™-5 devices have a high-precision programmable delay element (IDELAY) associated with every input pin. This application note shows how to implement 8X oversampling of many data streams using a single DCM, two global clock resources, and minimal FPGA logic resources. This solution provides better jitter tolerance than techniques using multiple DCMs. When paired with a suitable data recovery scheme, this oversampling technique can be used with many different data protocols up to 550 Mb/s. A reference design is included that implements a SD-SDI (SMPTE 259M) receiver running at 270 Mb/s.

This application note describes a 16-channel, source-synchronous DDR LVDS interface. The receiver operates at 1:6 deserialization on each of the 16 data channels. Similar to XAPP855, the design also includes a real-time window monitoring circuit for added performance. This reference design calibrates and compensates for skews associated with process, voltage, and temperature (PVT) at initialization and dynamically during operation.

This application note discusses dynamic bus mode reconfiguration of PCI-X designs using LogiCORE™ solutions. It shows how to dynamically reload a Virtex™-4 and Virtex-5 FPGA after power-up using a CPLD to dynamically reconfigure the FPGA supporting PCI-X and PCI compatibility.

This application note focuses on the baseband demodulation of Quadrature Amplitude Modulation (QAM) signals and, more specifically, on the use of a fractional rate decimator block. This application note also reviews polyphase decimating filter architectures and discusses the fractional rate decimator, its Xilinx System Generator 8.1i implementation, and its results.

This Virtex™-5 application note describes an SFI-4.1 interface, a 16-channel, source-synchronous LVDS interface operating at SDR. The transmitter requires 16 LVDS pairs for data and one LVDS pair for the forwarded clock. The receiver also requires 16 LVDS pairs for data and one LVDS pair for the source-synchronous clock input.The timing of the receiver is described in depth and characterized in hardware.

This application note describes a 16-channel, source-synchronous DDR LVDS interface. The design takes advantage of the Virtex™-5 I/O ChipSync™ features ability to adjust the delay of the receiver datapaths creating dynamic setup/hold timing for each device at initialization, compensating for skews associated with the manufacturing process. The receiver operates at 1:8 deserialization on each of the 16 data channels.

This application note describes the implementation and timing details of a four-word burst Quad Data Rate (QDR II) SRAM interface for Virtex™-5 devices.

This application note describes how to use a Virtex™-5 device to interface to Common I/O(CIO) Double Data Rate (DDR) Reduced Latency DRAM (RLDRAM II) devices.

This application note describes a 200-MHz DDR SDRAM memory controller implemented in a Virtex™-5 device. This reference design uses the Virtex-5 ChipSync features to calibrate and adjust read data timing. A straightforward backend user interface is provided to allow integration into a complete FPGA design.

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 how to interface a Texas Instruments analog-to-digital converter (ADC) with serial low-voltage differential signaling (LVDS) outputs to Virtex®-4 or Virtex-5 FPGAs, utilizing the dedicated deserializer functions of both FPGA families.

This application note discusses the Serial Peripheral Interface (SPI) configuration mode introduced in the Virtex™-5 and Spartan™-3E FPGA families. The ISE™ iMPACT in-system programming solution with the Xilinx cables for prototype designs is described.

This application note describes the controller and data capture technique for high-performance DDR2 SDRAM interfaces. This data capture technique uses the Input Serializer/Deserializer(ISERDES) and Output Double Data Rate (ODDR) features available in every Virtex®-5 I/O.

Describes the 3.3V PCI solution for the Virtex®-II Pro, Virtex-4, and Virtex-5 FPGA families.

This application note describes the implementation of an Error Correction Control (ECC) module in a Virtex™-II, Virtex-II Pro, Virtex-4, and Virtex-5 device. The design can detect and correct all single bit errors (in a code word consisting of either 64-bit data and 8 parity bits, or 32-bit data and 7 parity bits), and it can detect double bit errors in the data. This design utilizes Hamming code, a simple yet powerful method for ECC operations. As a result, this design offers exceptional performance and resource utilization.

This application note describes the controller and the data capture technique for high-performance DDR3 SDRAM interfaces. This data capture technique uses the Input Double Data Rate (IDDR) and Output Double Data Rate (ODDR) features available in every Virtex™-5 FPGA I/O.

This application note provides a reference design for point-to-point (FPGA to FPGA) high-speed serial packet transfer functionality using the integrated Endpoint block for PCI Express® designs in a Virtex™-5 LXT FPGA.

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 document provides information for debugging board level problems by using ChipScope™ Pro with Endpoint for PCI Express designs using Virtex™-4, Virtex-5, Virtex-II Pro FPGAs, the Endpoint PIPE for PCIe core using Spartan™-3/-3E/-3A FPGAs, and in the Endpoint Block Plus for PCIe core with Virtex-5 devices.

This application note discusses using the provided Memory Endpoint Test (MET) demonstration driver to exercise the Programmed Input/Output (PIO) design that is delivered with the Endpoint Block Plus Wrapper, Endpoint, and Endpoint PIPE for PCI Express® Xilinx solutions.

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 describes difference-based partial reconfiguration. This type of reconfiguration is used when making small changes to design parameters including logic equations, filter parameters, and I/O standards.

The ITU-G.709 standard for error correction is examined and implemented in both the Virtex™-4 and Virtex-5 Platform FPGA families using the LogiCORE™ Reed-Solomon (RS) Encoder and Decoder cores.

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 explains the techniques to support SATA initialization in the GTP transceiver of the Virtex™-5 LXT platform.

This application note describes how to interface 3.3V differential Low-Voltage Positive Emitter Coupled Logic (LVPECL) drivers with Xilinx® 2.5V differential receivers, including Virtex®-II Pro, Virtex-II Pro X, Virtex-4, Virtex-5, Spartan®-3E, and Spartan-3 FPGA 2.5V LVPECL and Low Voltage Differential Signaling (LVDS). Several interface modifications are presented with supporting IBIS simulation results.

This document details the design aspects of digital PLLs implemented in Virtex™ and Spartan™ FPGAs for telecommunications applications. PLL performance and loop stability are evaluated.