F-Tile CPRI PHY Intel® FPGA IP User Guide

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ID 683284
Date 8/15/2024
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Document Table of Contents
Document Table of Contents x
1. About the F-Tile CPRI PHY Intel® FPGA IP 2. Getting Started 3. IP Parameter Settings 4. Functional Description 5. IP Registers 6. F-Tile CPRI PHY Intel FPGA IP User Guide Archives 7. Document Revision History for the F-Tile CPRI PHY Intel FPGA IP User Guide
1. About the F-Tile CPRI PHY Intel® FPGA IP x
1.1. Supported Features 1.2. Block Diagram 1.3. Device Family Support 1.4. Device Speed Grade Support 1.5. Resource Utilization 1.6. F-Tile CPRI PHY IP Release Information
2. Getting Started x
2.1. Installing and Licensing Intel® FPGA IP Cores 2.2. Specifying the IP Core Parameters and Options 2.3. Generated File Structure 2.4. IP Core Testbenches
2.1. Installing and Licensing Intel® FPGA IP Cores x
2.1.1. Intel® FPGA IP Evaluation Mode
2.2. Specifying the IP Core Parameters and Options x
2.2.1. Reference and System PLL Clock for your IP Design
3. IP Parameter Settings x
3.1. Analog Parameters for F-Tile IPs
4. Functional Description x
4.1. Reset Logic 4.2. Latency Measurement
4.2. Latency Measurement x
4.2.1. Deterministic Latency 4.2.2. Calculation for 64b/66b Datapath
1. About the F-Tile CPRI PHY Intel® FPGA IP
2. Getting Started
3. IP Parameter Settings
4. Functional Description
5. IP Registers
6. F-Tile CPRI PHY Intel FPGA IP User Guide Archives
7. Document Revision History for the F-Tile CPRI PHY Intel FPGA IP User Guide

4.2.2. Calculation for 64b/66b Datapath

If the 64b/66b datapath RSFEC is enabled, perform the following steps to configure the DL logic in F-tile before the RX latency calculation:
  1. Ensure the o_rx_blocklock signal is asserted.
  2. Read the RSFEC code word position value from rsfec_cw_pos_rx register, num field using the Datapath Avalon memory-mapped interface. For more information, refer to the F-Tile Ethernet Intel FPGA Hard IP Register Map.
  3. Program the RSFEC code word position value to FGT fgt_q_dl_ctrl_a_l<x> register, cfg_rx_lat_bit_for_async field using the PMA Avalon memory-mapped interface. The fgt_q_dl_ctrl_a_l<x> register is based on the placement of the FGT transceiver:
    1. FGT15, FGT11, FGT7, FGT3: fgt_q_dl_ctrl_a_l3
    2. FGT14, FGT10, FGT6, FGT2: fgt_q_dl_ctrl_a_l2
    3. FGT13, FGT9, FGT5, FGT1: fgt_q_dl_ctrl_a_l1
    4. FGT12, FGT8, FGT4, FGT0: fgt_q_dl_ctrl_a_l0
    For more information, refer to the F-Tile PMA/FEC Direct PHY Intel FPGA IP Register Map.
  4. Reset the deterministic measure logic for RX datapath by asserting the rx_dl_restart bit at register offset 0x8 using the reconfig_cpri interface.
  5. Release the reset for deterministic measure logic for RX datapath by clearing the rx_dl_restart bit at register offset 0x8 using the reconfig_cpri interface.
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