eCPRI Intel® FPGA IP User Guide

ID 683685
Date 11/11/2021
Public

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Document Table of Contents

4.1. Interfaces

The eCPRI Intel® FPGA IP supports the following interfaces:
  • Clock and Reset Interface

    The main interface for the clock and reset signals in the eCPRI IP.

  • Configuration Avalon-Memory Mapped Interface

    This interface provides access to the internal control and status registers of the eCPRI IP. This interface complies with Avalon Memory-Mapped (Avalon-MM) specification as defined in the Avalon Interface Specifications.

  • External MAC Source Interface

    This interface provides datapath from eCPRI IP to 25G Ethernet MAC IP. This interface complies with Avalon-Steaming (Avalon-ST) specification as defined in the Avalon Interface Specifications.

  • External MAC Sink Interface

    This interface provides datapath from 25G Ethernet MAC IP to eCPRI IP. This interface complies with Avalon-Steaming specification as defined in the Avalon Interface Specifications.

  • eCPRI IP Source Interface

    This interface provides datapath from eCPRI IP to client logic. This interface includes a number of sideband signals which align with the Avalon-ST clock. This interface complies with Avalon-Steaming specification as defined in the Avalon Interface Specifications.

  • eCPRI IP Sink Interface

    This interface provides datapath from client logic to eCPRI IP. This interface includes a number of sideband signals which align with the Avalon-ST clock. This interface complies with Avalon-Steaming specification as defined in the Avalon Interface Specifications.

  • IWF Type 0 eCPRI Source Interface

    This interface provides datapath from eCPRI IP to IWF logic. This interface includes a number of sideband signals which align with the eCPRI IP source interface.

  • IWF Type 0 eCPRI Sink Interface

    This interface provides datapath from IWF logic to eCPRI IP. This interface includes a number of sideband signals which align with the eCPRI IP source interface.

  • IWF Type 0 CPRI MAC Interface
    This interface provides datapath from eCPRI IWF type 0 function to CPRI MAC. This interface consists of the following interfaces:
    • CPRI 32-bit IQ Data
    • CPRI 64-bit IQ Data
    • CPRI 32-bit Ctrl_AxC
    • CPRI 64-bit Ctrl_AxC
    • CPRI 32-bit Vendor Specific
    • CPRI 64-bit Vendor Specific
    • CPRI 32-bit Real-Time Vendor Specific
    • CPRI 64-bit Real-Time Vendor Specific
    • CPRI Gigabit Media Independent Interface (GMII)
  • External ST Source Interface

    This interface provides datapath from eCPRI IP to client logic. This interface is a primary output interface for PTP and C&M messages. This interface complies with Avalon-Steaming specification as defined in the Avalon Interface Specifications. This interface includes a number of sideband signals which align with the Avalon-ST clock.

  • External ST Sink Interface

    This interface provides datapath from client logic to eCPRI IP. This interface is a primary input for PTP and C&M messages. This interface complies with Avalon-Steaming specification as defined in the Avalon Interface Specifications.

  • TX and RX Time-of-Day (TOD) Interface:

    This interface provides 96-bit timestamp from PTP module to eCPRI IP core and to client logic.

Figure 6. eCPRI Intel® FPGA IP High-Level System Overview