F-Tile CPRI PHY Intel® FPGA IP Design Example User Guide

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ID 683281
Date 8/15/2024
Public
Document Table of Contents
Document Table of Contents x
1. Quick Start Guide 2. Design Example Description 3. F-Tile CPRI PHY Intel® FPGA IP Design Example User Guide Archives 4. Document Revision History for the F-Tile CPRI PHY Intel® FPGA IP Design Example User Guide
1. Quick Start Guide x
1.1. Hardware and Software Requirements 1.2. Generating the Design Example 1.3. Directory Structure 1.4. Simulating the Design Example 1.5. Compiling the Compilation-Only Project 1.6. Compiling and Configuring the Design Example in Hardware 1.7. Testing the Hardware Design Example 1.8. Transceiver Toolkit
1.2. Generating the Design Example x
1.2.1. Analog Parameters Tab
1.4. Simulating the Design Example x
1.4.1. Simulating the Design Example Testbench 1.4.2. Simulating the Design Example Testbench Simplified Model
2. Design Example Description x
2.1. Features 2.2. Design Example Components 2.3. Simulation Design Example 2.4. F-Tile CPRI IP Hardware Design Example 2.5. Interface Signals 2.6. Design Example Registers
2.2. Design Example Components x
2.2.1. Packet Client 2.2.2. Round Trip Counter 2.2.3. Sources and Probes 2.2.4. Avalon® Memory-Mapped Decoder 2.2.5. JTAG Host 2.2.6. IOPLL 2.2.7. System PLL
1. Quick Start Guide
2. Design Example Description
3. F-Tile CPRI PHY Intel® FPGA IP Design Example User Guide Archives
4. Document Revision History for the F-Tile CPRI PHY Intel® FPGA IP Design Example User Guide

2.3. Simulation Design Example

The F-Tile CPRI PHY Intel® FPGA IP design example generates a simulation testbench and simulation files that instantiate the F-Tile CPRI PHY IP when you select the Simulation option.
Figure 10. F-Tile CPRI IP Design Example Block Diagram
  1. For CPRI designs with CPRI line rate 1.2, 2.4, 3, 4.9, 6.1, and 9.8 Gbps use 8b/10b interface. For CPRI designs with CPRI line rates 10.1,12.1, and 24.3 Gbps with and without RS-FEC use MII.
  2. Transceiver reference clock:
    • 122.88 MHz: For all CPRI line rates.
    • 153.6 MHz: For CPRI line rates 1.2, 2.4, 3, 4.9, 6.1, and 9.8 Gbps.
    • 184.32 MHz: For CPRI line rates 10.1,12.1, and 24.3 Gbps with and without RS-FEC.

In this design example, the simulation testbench provides basic functionality such as startup and wait for lock, transmit, and receive packets.

The successful test run displays output confirming the following behavior:
  1. The client logic resets the IP core.
  2. The client logic waits for the RX datapath alignment.
  3. The client logic transmits hyperframes on the TX MII and waits for five hyperframes to be received on the RX MII. Hyperframes are transmitted and received on the MIIs, per the CPRI v7.0 specifications.
    Note: The CPRI designs that target 1.2, 2.4, 3, 4.9, 6.1, and 9.8 Gbps line rates use 8b/10b interface and the designs that target 10.1, 12.1, and 24.3 Gbps (with and without RS-FEC) use MII.
    Note: This design example includes a round trip counter to count the round trip latency from TX to RX.
  4. The client logic reads the round trip latency value and checks for the content and correctness of the hyperframes data on the RX MII side when the counter completes the round trip latency count.
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