F-Tile Low Latency Ethernet 10G MAC Intel® FPGA IP User Guide

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ID 720985
Date 4/01/2022
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Document Table of Contents
Document Table of Contents x
1. About the F-Tile Low Latency Ethernet 10G MAC Intel® FPGA IP User Guide 2. Low Latency Ethernet 10G MAC Intel® FPGA IP Overview 3. Getting Started 4. Functional Description 5. Low Latency Ethernet 10G MAC Intel® FPGA IP Parameters 6. Interface Signals 7. Configuration Registers 8. Document Revision History for the F-Tile Low Latency Ethernet 10G MAC Intel® FPGA IP User Guide
2. Low Latency Ethernet 10G MAC Intel® FPGA IP Overview x
2.1. Release Information 2.2. Features 2.3. Low Latency Ethernet 10G MAC Operating Modes 2.4. Device Family Support 2.5. Performance and Resource Utilization
2.5. Performance and Resource Utilization x
2.5.1. Resource Utilization 2.5.2. TX and RX Latency
3. Getting Started x
3.1. Introduction to Intel® FPGA IP Cores 3.2. Installing and Licensing Intel® FPGA IP Cores 3.3. Specifying the IP Core Parameters and Options ( Intel® Quartus® Prime Pro Edition) 3.4. Generated File Structure 3.5. Simulating Intel® FPGA IP Cores 3.6. Upgrading the Low Latency Ethernet 10G MAC Intel® FPGA IP Core 3.7. Low Latency Ethernet 10G MAC Intel® FPGA IP Design Examples
3.6. Upgrading the Low Latency Ethernet 10G MAC Intel® FPGA IP Core x
3.6.1. Designing Considerations for the F-Tile Low Latency Ethernet 10G MAC Intel® FPGA IP
3.6.1. Designing Considerations for the F-Tile Low Latency Ethernet 10G MAC Intel® FPGA IP x
3.6.1.1. Timing Constraints
3.6.1.1. Timing Constraints x
3.6.1.1.1. Pseudo-Static CSR Fields 3.6.1.1.2. Clock Crosser 3.6.1.1.3. Dual Clock FIFO
3.7. Low Latency Ethernet 10G MAC Intel® FPGA IP Design Examples x
3.7.1. Low Latency Ethernet 10G MAC Intel® FPGA IP Design Example for Intel® Agilex™ Devices
4. Functional Description x
4.1. Architecture 4.2. Interfaces 4.3. Frame Types 4.4. TX Datapath 4.5. RX Datapath 4.6. Flow Control 4.7. Reset Requirements 4.8. Supported PHYs 4.9. XGMII Error Handling (Link Fault)
4.4. TX Datapath x
4.4.1. Padding Bytes Insertion 4.4.2. Address Insertion 4.4.3. CRC-32 Insertion 4.4.4. XGMII Encapsulation 4.4.5. Inter-Packet Gap Generation and Insertion 4.4.6. XGMII Transmission 4.4.7. TX Promiscuous (Transparent) Mode 4.4.8. TX Timing Diagrams
4.4.4. XGMII Encapsulation x
4.4.4.1. Transmit Path
4.5. RX Datapath x
4.5.1. XGMII Decapsulation 4.5.2. CRC Checking 4.5.3. Address Checking 4.5.4. Frame Type Checking 4.5.5. CRC and Padding Bytes Removal 4.5.6. Frame Length Checking 4.5.7. Overflow Handling 4.5.8. RX Promiscuous (Transparent) Mode 4.5.9. RX Timing Diagrams
4.5.3. Address Checking x
4.5.3.1. Unicast Frame Filtering 4.5.3.2. Multicast Frame Filtering
4.5.4. Frame Type Checking x
4.5.4.1. Malformed RX Packets 4.5.4.2. CRC Error 4.5.4.3. Address Check Error
4.5.6. Frame Length Checking x
4.5.6.1. Frame Length 4.5.6.2. Payload Length
4.6. Flow Control x
4.6.1. IEEE 802.3 Flow Control
4.6.1. IEEE 802.3 Flow Control x
4.6.1.1. Pause Frame Reception 4.6.1.2. Pause Frame Transmission
6. Interface Signals x
6.1. Clock and Reset Signals 6.2. Speed Selection Signal 6.3. Error Correction Signals 6.4. Avalon® Memory-Mapped Interface Programming Signals 6.5. Avalon® Streaming Data Interfaces 6.6. Avalon® Streaming Flow Control Signals 6.7. Avalon® Streaming Status Interface 6.8. PHY-side Interfaces
6.5. Avalon® Streaming Data Interfaces x
6.5.1. Avalon® Streaming TX Data Interface Signals 6.5.2. Avalon® Streaming RX Data Interface Signals 6.5.3. Avalon® Streaming Data Interface Clocks
6.7. Avalon® Streaming Status Interface x
6.7.1. Avalon® Streaming Interface TX Status Signals 6.7.2. Avalon® Streaming Interface RX Status Signals
6.8. PHY-side Interfaces x
6.8.1. XGMII TX Signals 6.8.2. XGMII RX Signals
7. Configuration Registers x
7.1. Register Map 7.2. Register Access Definition 7.3. Primary MAC Address 7.4. TX Configuration and Status Registers 7.5. Flow Control Registers 7.6. RX Configuration and Status Registers 7.7. ECC Registers 7.8. Statistics Registers
1. About the F-Tile Low Latency Ethernet 10G MAC Intel® FPGA IP User Guide
2. Low Latency Ethernet 10G MAC Intel® FPGA IP Overview
3. Getting Started
4. Functional Description
5. Low Latency Ethernet 10G MAC Intel® FPGA IP Parameters
6. Interface Signals
7. Configuration Registers
8. Document Revision History for the F-Tile Low Latency Ethernet 10G MAC Intel® FPGA IP User Guide

6.1. Clock and Reset Signals

The Low Latency Ethernet 10G MAC Intel® FPGA IP core operates in multiple clock domains. You can use different sources to drive the clock and reset domains. You can also use the same clock source as specified in the description of each signal.

Table 16.  Clock and Reset SignalsThis table lists the supported clock and reset signals for the 10M/100M/1G/2.5G/5G/10G (USXGMII) operating mode.
Signal Direction Width Description
tx_312_5_clk In 1 312.5 MHz clock for the MAC TX datapath. You may use the same clock source for this clock with rx_312_5_clk.
tx_156_25_clk In 1

156.25 MHz clock for the MAC TX datapath when you choose to maintain compatibility with the 64-bit Ethernet 10G MAC on the Avalon® streaming TX data interface.

Intel recommends that this clock and tx_312_5_clk share the same clock source. This clock must be synchronous to tx_312_5_clk. Their rising edges must align and must have 0 ppm and phase-shift.

rx_312_5_clk In 1 312.5 MHz clock for the MAC RX datapath. You may use the same clock source for this clock with tx_312_5_clk.
rx_156_25_clk In 1

156.25MHz clock for the MAC RX datapath when you choose to maintain compatibility with the 64-bit Ethernet 10G MAC on the Avalon® streaming RX data interface.

Intel recommends that you use the same clock source for this clock and rx_312_5_clk. This clock must be synchronous to rx_312_5_clk. Their rising edges must align and must have 0 ppm and phase-shift.

csr_clk In 1 125MHz clock for the CSR read and write registers .
tx_rst_n In 1 Active-low asynchronous reset in the tx_312_5_clk clock domain for the MAC TX datapath
rx_rst_n In 1

Active-low reset in the rx_312_5_clk clock domain for the MAC RX datapath.

csr_rst_n In 1

Active-low reset in the csr_clk clock domain for the CSR registers.

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