概述和功能介绍

DDR interface provides full support for the DDR interface, compatible with JESD79F specification and DFI-version 2.0 or higher Specification Compliant. Through its DDR compatibility, it provides a simple interface to a wide range of low-cost devices. DDR IP is proven in FPGA environment. The host interface of the DDR can be simple interface or can be AMBA AHB, AMBA AHB-Lite, AMBA APB, AMBA AXI, AMBA AXILite, Tilelink, OCP, VCI, Avalon, PLB, Wishbone or Custom protocol.

功能描述

• DDR protocol standard JESD79F Specification.
• Compliant with DFI-version 2.0 or higher Specification.
• Supports all the DDR commands as per the specs.
• Supports up to 16 AXI ports with data width upto 512 bits.
• Supports controllable outstanding transactions for AXI write and read channels
• Supports in port arbitration and multi port arbitration.
• Supports user programmable page policy. • Closed page policy • Open page policy
• Supports Error Checking and correction (ECC).
• Supports retry on ECC error, with retry limit user controllable.
• Supports high clock speeds in ASIC and FPGA.
• Supports low latency for write and read path.
• Supports reordering of transactions for higher performance.
• Supports all device speeds as per specification.
• Supports Programmable CAS latency.
• Supports Programmable burst lengths: 2,4 and 8.
• Supports Write data Mask.
• Supports the X4, X8, X16 devices.
• Supports the 64MB, 128MB, 256MB, 512MB, 1GB memory densities.
• Supports the following burst types. • Sequential • Interleave
• Supports burst order.
• Supports for All Mode registers programming.
• Supports for Extended Mode registers programming.
• Supports Auto refresh & self refresh modes.
• Supports Auto precharge option for each burst access.
• Supports Power Down features.
• Supports input clock stop and frequency change.
• Supports DLL operation.
• Fully synthesizable
• Static synchronous design.
• Positive edge clocking and no internal tri-states.
• Scan test ready
• Simple interface allows easy connection to microprocessor/microcontroller devices

Benefits

• Single site license option is provided to companies designing in a single site.
• Multi sites license option is provided to companies designing in multiple sites.
• Single Design license allows implementation of the IP Core in a single FPGA bitstream and ASIC.
• Unlimited Designs, license allows implementation of the IP Core in unlimited number of FPGA bitstreams and ASIC designs.

Deliverables

• The DDR interface is available in Source and netlist products.
• The Source product is delivered in plain text Verilog. If needed VHDL, SystemC code can also be provided.
• Easy to use Verilog Test Environment with Verilog Testcases
• Lint, CDC, Synthesis, Simulation Scripts with waiver files
• IP-XACT RDL generated address map
• Firmware code and Linux driver package
• Documentation contains User's Guide and Release notes.