Low Latency Ethernet 10G MAC IP Design Example User Guide: Agilex™ 3 and Agilex™ 5 FPGAs and SoCs

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ID 813665
Date 10/24/2025
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Document Table of Contents
Document Table of Contents x
1. Quick Start Guide 2. 10M/100M/1G/2.5G Ethernet Design Example 3. 10M/100M/1G/2.5G/10G Ethernet Design Example 4. 1G/2.5G Ethernet Design Example with IEEE 1588v2 Feature 5. 1G/2.5G/10G Ethernet Design Example with IEEE 1588v2 Feature 6. 2.5G Ethernet Design Example 7. 2.5G Ethernet Design Example with IEEE 1588v2 Feature 8. 10M/100M/1G/2.5G/10G MGE (Multi Gigabit Ethernet) PCS Only Ethernet Design Example 9. 10M/100M/1G/2.5G/5G/10G (USXGMII) Ethernet Design Example 10. 10M/100M/1G/2.5G/5G/10G (USXGMII) Ethernet Design Example with IEEE 1588v2 Feature 11. Interface Signals Description 12. Configuration Registers Description 13. Low Latency Ethernet 10G MAC IP Design Example User Guide: Agilex™ 3 and Agilex™ 5 FPGAs and SoCs Archives 14. Document Revision History for the Low Latency Ethernet 10G MAC IP Design Example User Guide: Agilex™ 3 and Agilex™ 5 FPGAs and SoCs
1. Quick Start Guide x
1.1. Directory Structure 1.2. Generating the Design 1.3. Simulating the Design 1.4. Compiling and Configuring the Design Example in Hardware 1.5. Signal Tap Debugging
1.2. Generating the Design x
1.2.1. Procedure 1.2.2. Design Example Parameters
1.3. Simulating the Design x
1.3.1. Procedure 1.3.2. Testbench
1.4. Compiling and Configuring the Design Example in Hardware x
1.4.1. Procedure 1.4.2. Hardware Setup
1.5. Signal Tap Debugging x
1.5.1. Signals Description 1.5.2. Signals List
2. 10M/100M/1G/2.5G Ethernet Design Example x
2.1. Features 2.2. Hardware and Software Requirements 2.3. Functional Description 2.4. Simulation 2.5. Hardware Testing 2.6. Interface Signals 2.7. Configuration Registers
2.3. Functional Description x
2.3.1. Design Components 2.3.2. Clocking Scheme 2.3.3. Reset Scheme
2.5. Hardware Testing x
2.5.1. Test Procedure
3. 10M/100M/1G/2.5G/10G Ethernet Design Example x
3.1. Features 3.2. Hardware and Software Requirements 3.3. Functional Description 3.4. Simulation 3.5. Hardware Testing 3.6. Interface Signals 3.7. Configuration Registers
3.3. Functional Description x
3.3.1. Design Components 3.3.2. Clocking Scheme 3.3.3. Reset Scheme
3.5. Hardware Testing x
3.5.1. Test Procedure
4. 1G/2.5G Ethernet Design Example with IEEE 1588v2 Feature x
4.1. Features 4.2. Hardware and Software Requirements 4.3. Functional Description 4.4. Simulation 4.5. Hardware Testing 4.6. Interface Signals 4.7. Configuration Registers
4.3. Functional Description x
4.3.1. Design Components 4.3.2. Clocking Scheme 4.3.3. Reset Scheme
4.4. Simulation x
4.4.1. Test Case—Design Example with the IEEE 1588v2 Feature
4.5. Hardware Testing x
4.5.1. Test Procedure
5. 1G/2.5G/10G Ethernet Design Example with IEEE 1588v2 Feature x
5.1. Features 5.2. Hardware and Software Requirements 5.3. Functional Description 5.4. Simulation 5.5. Hardware Testing 5.6. Interface Signals 5.7. Configuration Registers
5.3. Functional Description x
5.3.1. Design Components 5.3.2. Clocking Scheme 5.3.3. Reset Scheme
5.4. Simulation x
5.4.1. Test Case—Design Example with the IEEE 1588v2 Feature
5.5. Hardware Testing x
5.5.1. Test Procedure
6. 2.5G Ethernet Design Example x
6.1. Features 6.2. Hardware and Software Requirements 6.3. Functional Description 6.4. Simulation 6.5. Hardware Testing 6.6. Interface Signals 6.7. Configuration Registers
6.3. Functional Description x
6.3.1. Design Components 6.3.2. Clocking Scheme 6.3.3. Reset Scheme
6.5. Hardware Testing x
6.5.1. Test Procedure
7. 2.5G Ethernet Design Example with IEEE 1588v2 Feature x
7.1. Features 7.2. Hardware and Software Requirements 7.3. Functional Description 7.4. Simulation 7.5. Hardware Testing 7.6. Interface Signals 7.7. Configuration Registers
7.3. Functional Description x
7.3.1. Design Components 7.3.2. Clocking Scheme 7.3.3. Reset Scheme
7.4. Simulation x
7.4.1. Test Case—Design Example with the IEEE 1588v2 Feature
7.5. Hardware Testing x
7.5.1. Test Procedure
8. 10M/100M/1G/2.5G/10G MGE (Multi Gigabit Ethernet) PCS Only Ethernet Design Example x
8.1. Features 8.2. Hardware and Software Requirements 8.3. Functional Description 8.4. Simulation 8.5. Hardware Testing 8.6. Interface Signals 8.7. Configuration Registers
8.3. Functional Description x
8.3.1. Design Components 8.3.2. Clocking Scheme 8.3.3. Reset Scheme
8.5. Hardware Testing x
8.5.1. Test Procedure
9. 10M/100M/1G/2.5G/5G/10G (USXGMII) Ethernet Design Example x
9.1. Features 9.2. Hardware and Software Requirements 9.3. Functional Description 9.4. Simulation 9.5. Hardware Testing 9.6. Interface Signals 9.7. Configuration Registers
9.3. Functional Description x
9.3.1. Design Components 9.3.2. Clocking Scheme 9.3.3. Reset Scheme
9.5. Hardware Testing x
9.5.1. Test Procedure
10. 10M/100M/1G/2.5G/5G/10G (USXGMII) Ethernet Design Example with IEEE 1588v2 Feature x
10.1. Features 10.2. Hardware and Software Requirements 10.3. Functional Description 10.4. Simulation 10.5. Hardware Testing 10.6. Interface Signals
10.3. Functional Description x
10.3.1. Design Components 10.3.2. Clocking Scheme 10.3.3. Reset Scheme
10.4. Simulation x
10.4.1. Test Case—Design Example with the IEEE 1588v2 Feature
10.5. Hardware Testing x
10.5.1. Test Procedure
11. Interface Signals Description x
11.1. Clock and Reset Interface Signals 11.2. Avalon® Memory-Mapped Interface Signals 11.3. Avalon® Streaming Interface Signals 11.4. PHY Interface Signals 11.5. Status Interface 11.6. IEEE 1588v2 Timestamp Interface Signals
12. Configuration Registers Description x
12.1. Register Access Definition 12.2. Low Latency Ethernet 10G MAC 12.3. PHY 12.4. Packet Generator and Traffic Monitor Register Map
12.3. PHY x
12.3.1. 1G/2.5G/5G/10G Multirate PHY
1. Quick Start Guide
2. 10M/100M/1G/2.5G Ethernet Design Example
3. 10M/100M/1G/2.5G/10G Ethernet Design Example
4. 1G/2.5G Ethernet Design Example with IEEE 1588v2 Feature
5. 1G/2.5G/10G Ethernet Design Example with IEEE 1588v2 Feature
6. 2.5G Ethernet Design Example
7. 2.5G Ethernet Design Example with IEEE 1588v2 Feature
8. 10M/100M/1G/2.5G/10G MGE (Multi Gigabit Ethernet) PCS Only Ethernet Design Example
9. 10M/100M/1G/2.5G/5G/10G (USXGMII) Ethernet Design Example
10. 10M/100M/1G/2.5G/5G/10G (USXGMII) Ethernet Design Example with IEEE 1588v2 Feature
11. Interface Signals Description
12. Configuration Registers Description
13. Low Latency Ethernet 10G MAC IP Design Example User Guide: Agilex™ 3 and Agilex™ 5 FPGAs and SoCs Archives
14. Document Revision History for the Low Latency Ethernet 10G MAC IP Design Example User Guide: Agilex™ 3 and Agilex™ 5 FPGAs and SoCs

11.1. Clock and Reset Interface Signals

Table 34.  Clock and Reset Interface Signals
Signal Direction Width Description
csr_clk In 1 125 MHz configuration clock for the Avalon® memory-mapped interface and core logic.
clk_xcvr_sync In 1 100MHz input clock to IOPLL. This clock should be sourced and synchronous with the trancsceiver reference clock refclk_1g2p5g_p.
i_tx_rst_n In 1

Active-low reset signal for the TX datapath.
i_rx_rst_n In 1

Active-low reset signal for the RX datapath.
mac_clk In 1 156.25 MHz configuration clock for the Avalon® streaming interface and 0 ppm frequency difference with refclk.

mac64b_clk

mac32b_clk

 Out 1 156.25 MHz and 312.5 MHz configuration clock for the Avalon® streaming interface and 0 ppm frequency difference with refclk.
mac_312_5_clk In 1 312.5 MHz configuration clock for the Avalon® streaming interface and MAC module.

refclk_lg2p5g_p

 In 1 156.25 MHz reference clock for PHY.
refclk_10g In 1 156.25 MHz reference clock for the System PLL.
refclk_p In 1 156.25 MHz reference clock for PHY.
rx_pma_clkout Out 1 CDR recovered clock.
reset 1 In 1 Assert this asynchronous and active-high signal to reset the whole design example.
reset In 1 Assert this asynchronous and active-high signal to reset the MAC and PHY soft IP datapath.
i_system_clk In 1 156.25 MHz reference clock for System PLL.
tx_digitalreset In [NUM_CHANNELS]

Asynchronous and active-high signal to reset MAC and PCS TX portion of the transceiver PHY.
rx_digitalreset In [NUM_CHANNELS]

Asynchronous and active-high signal to reset MAC and PCS RX portion of the transceiver PHY.
tx_digitalreset 1 Out [NUM_CHANNELS] Asynchronous and active-high signal to reset the MAC and PCS TX portion of of the transceiver PHY.
rx_digitalreset 1 Out [NUM_CHANNELS] Asynchronous and active-high signal to reset the MAC and PCS RX portion of of the transceiver PHY.
reconfig_reset In 1 Active-high reset signal for transceiver registers.
i_rst_n In 1 Active-low global reset asynchronous signal. Do not deassert until the o_rst_ack_n signal is asserted ('0').
i_rst_n 1 In 1 Active-low reset asynchronous signal.
mrphy_pll_clkout Out [NUM_CHANNELS] Output clock for 1G/2.5G/5G/10G Multirate Ethernet PHY IP. It provides 156.25 MHz timing reference for 2.5G, 62.5 MHz for 1G, 10M, and 100M.
fast_sim_clk_sel Out 1 Used during simulation only. It allows you to reduce the simulation run time by driving the i_cpu_clk port of Dynamic Reconfiguration (DR) Controller IP with different input frequencies.
reconfig_clk_cpu In 1 To reduce run time during simulation, drive this clock according to fast_sim_clk_sel port.
1 Applicable for USXGMII Design Example.
Level Two Title