F-Tile Dynamic Reconfiguration Design Example User Guide
ID
710582
Date
8/18/2025
Public
1. Quick Start Guide
2. Detailed Description for CPRI Multirate Design Example
3. Detailed Description for Ethernet Multirate Design Example
4. Detailed Description for Ethernet Multirate Design Example with Auto-Negotiation and Link Training Enabled
5. Detailed Description for PMA/FEC Direct PHY Multirate Design Example
6. Detailed Description for Ethernet to CPRI Design Example
7. Detailed Description for PMA/FEC Direct PHY Static IPs Design Implementation
8. F-Tile Dynamic Reconfiguration Design Example User Guide Archives
9. Document Revision History for the F-Tile Dynamic Reconfiguration Design Example User Guide
4.1.1. AN/LT with Dynamic Reconfiguration Design Example Enhancement: User Logic
4.1.2. Ethernet Multirate Design Example with AN/LT Enabled: Simulation Testbench
Dynamic Reconfiguration Sequence Example: 100GE-4 > 2x 50GE-1 > 4x 25GE-1
4.1.3. Ethernet Multirate Hardware Design Example with AN/LT Enabled
4.1.2. Ethernet Multirate Design Example with AN/LT Enabled: Simulation Testbench
Figure 24. Simulation Testbench Block Diagram for 25GE-1 Base Variant with AN/LT Enabled
Figure 25. Simulation Testbench Block Diagram for 100GE-4 Base Variant with AN/LT Enabled
Figure 26. Simulation Testbench Block Diagram for 400GE-8 Base Variant with AN/LT Enabled
Figure 27. Simulation Testbench Block Diagram for 400G-4 FHT Base Variant with AN/LT Enabled
The testbench program controls the testbench components via Avalon® memory-mapped interface access, status and control signals. The Avalon® memory-mapped interface arbiter decodes the Avalon® memory-mapped interface access from testbench program into multiple Avalon® memory-mapped interface slaves.
Simulation Flow:
- Ethernet Multirate IP DUT is power-up based on base profile.
- Initialize the testbench variables based on power-up profile. The parameter settings, located in the basic_avl_tb_top.sv file, are:
- DR_NUM: To indicate the number of dynamic reconfiguration transitions.
- DR_SEQ: To indicate the dynamic reconfiguration sequence.
- Perform Auto-Negotiation and Link Training.
- Enable the Auto-Negotiation and Link Training IP. User logic reads AN results and triggers dynamic reconfiguration flow.
- Once the Dynamic Reconfiguration completes, you can program seq_force_mode AN/LT CSR to notify about the Dynamic Reconfigured profile; otherwise, AN/LT IP is expected to follow the AN result.
- Disable the AN/LT IP.
- Move to data or Ethernet mode and start transmitting packets.
- Check the testbench error flag to determine whether the testbench passed or failed. The error flag is set to 1 when the AN/LT with Dynamic reconfiguration and Ethernet flow is successfully completed.
For customization, you can modify the DR_NUM and DR_SEQ localparam to configure the test flow. The profile ID is passed to the IP to configure the intended dynamic reconfiguration task.
Dynamic Reconfiguration Sequence Example: 100GE-4 > 2x 50GE-1 > 4x 25GE-1
To achieve this dynamic reconfiguration sequence, you must perform two dynamic reconfiguration transitions and specify the reconfiguration sequence. You update the local parameter settings file:
// Available Modes localparam DR_MODE_1X100GE_4 = 6'b00_00_00; localparam DR_MODE_1X100GE_4_NOFEC = 6'b00_00_01; localparam DR_MODE_1X100GE_2 = 6'b00_00_11; localparam DR_MODE_2x50GE_1 = 6'b01_01_00; localparam DR_MODE_4X25GE_1 = 6'b10_00_00; localparam DR_MODE_4X25GE_1_NOFEC = 6'b10_00_01; // Dynamic Reconfiguration setting localparam DR_NUM = 2; localparam [6:0] DR_SEQ [DR_NUM - 1 : 0] = {DR_MODE_4X25GE_1, DR_MODE_2X50GE_1}