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Digilent FPGA Demo Boards » NEXYS-4 DDR


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NEXYS-4 DDR (NEXYS-4 DDR)

A few months ago, we were given notice that our memory provider would be obsoleting the production of cellular RAM. With this in mind, we asked our industry partners what they were looking for and redesigned our Nexys4 board to use the popular DDR external memory. The Nexys4-DDR is a drop-in replacement for our cellular RAM-based Nexys boards. Featuring the same Artix-7™ field programmable gate array (FPGA) from Xilinx, the Nexys4-DDR is a ready-to-use digital circuit development platform designed to bring additional industry applications into the classroom environment. With its large, high-capacity FPGA (Xilinx part number XC7A100T-1CSG324C) and collection of USB, Ethernet, and other ports, the Nexys4-DDR can host designs ranging from introductory combinational circuits to powerful embedded processors. Several built-in peripherals, including an accelerometer, a temperature sensor, MEMs digital microphone, speaker amplifier and plenty of I/O devices allow the Nexys4-DDR to be used for a wide range of designs without needing any other components. The most notable improvement is the replacement of the 16 MiB CellularRAM with a 128 MiB DDR2 SDRAM memory. Digilent will provide a VHDL reference module that wraps the complexity of a DDR2 controller and is backwards compatible with the asynchronous SRAM interface of the CellularRAM, with certain limitations.

The Artix-7 FPGA is optimized for high performance logic, and offers more capacity, higher performance, and more resources than earlier designs. Artix-7 100T features include:
  • 15,850 logic slices, each with four 6-input LUTs and 8 flip-flops
  • 4,860 Kbits of fast block RAM
  • Six clock management tiles, each with phase-locked loop (PLL)
  • 240 DSP slices
  • Internal clock speeds exceeding 450MHz
  • On-chip analog-to-digital converter (XADC)
The Nexys4 DDR also offers an improved collection of ports and peripherals, including:
  • 16 user switches
  • USB-UART Bridge
  • 12-bit VGA output
  • 3-axis accelerometer
  • 128MiB DDR2
  • Pmod for XADC signals
  • 16 user LEDs
  • Two tri-color LEDs
  • PWM audio output
  • Temperature sensor
  • Serial Flash
  • Digilent USB-JTAG port for FPGA programming and communication
  • Two 4-digit 7-segment displays
  • Micro SD card connector
  • PDM microphone
  • 10/100 Ethernet PHY
  • Four Pmod ports
  • USB HID Host for mice, keyboards and memory sticks


The Nexys4-DDR is compatible with Xilinx’s new high-performance Vivado® Design Suite as well as the ISE® toolset, which includes ChipScope™ and EDK. Xilinx offers free WebPACK™ versions of these toolsets, so designs can be implemented at no additional cost.

Note: The Nexys4-DDR is not supported by the Digilent Adept Utility.

Please visit Digilents website for supporting documentation


Academic  -  $242.00
Commercial  -  $469.00
   
   
 
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