Functional Description - 4.2 English

Zynq 7000 SoC and 7 Series Devices Memory Interface Solutions LogiCORE IP Data Sheet (DS176)

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4.2 English

As shown in the figure, the top-level functional blocks of the 7 series FPGAs memory interface solution include:

  • The User Interface block:
    • Presents the user interface to a user design
    • Provides a simple and user-friendly alternative to the native interface
    • Buffers read and write data
    • Reorders read return data to match the request order
    • Presents a flat address space and translates it to the addressing required by the SDRAM
  • The Memory Controller block:
    • Receives requests from the user design
    • Reorders requests to minimize dead states for maximum SDRAM performance
    • Manages SDRAM row/bank configuration
    • Performs high-level SDRAM management such as refresh and activate/precharge
  • The Physical Layer (PHY) block:
    • Interfaces with the Memory Controller block over a simple interface and translates the signals into the actual signals sent to the SDRAM, and vice versa.
    • Translates and synchronizes control and data over various clock domains
    • Initializes the SDRAM
    • Performs calibration to center align capture clocks with read data

The figure also shows a user design connecting to the memory interface. For more details regarding the design, see the Zynq 7000 SoC and 7 series Devices Memory Interface Solutions (UG586) provided with the core.