F-Tile Low Latency 100G Ethernet Intel® FPGA IP User Guide

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ID 792946
Date 3/31/2025
Public
Document Table of Contents
Document Table of Contents x
1. About the F-Tile Low Latency 100G Ethernet Intel® FPGA IP User Guide 2. About this IP 3. Getting Started 4. F-Tile Low Latency 100G Ethernet Intel® FPGA IP Parameters 5. Functional Description 6. Reset 7. Interfaces and Signal Descriptions 8. Control, Status, and Statistics Register Descriptions 9. Document Revision History for the F-Tile Low Latency 100G Ethernet Intel® FPGA IP User Guide
2. About this IP x
2.1. Release Information 2.2. Features 2.3. Device Family Support
3. Getting Started x
3.1. Installing and Licensing Intel FPGA IP Cores 3.2. Specifying the IP Core Parameters and Options 3.3. Simulating the IP Core 3.4. Generated File Structure 3.5. Integrating Your IP Core in Your Design 3.6. Compiling the Full Design and Programming the FPGA
3.1. Installing and Licensing Intel FPGA IP Cores x
3.1.1. Intel FPGA IP Evaluation Mode
3.5. Integrating Your IP Core in Your Design x
3.5.1. Pin Assignments 3.5.2. Adding the F-Tile Reference and System PLL Clocks Intel FPGA IP 3.5.3. Placement Settings for the 100G Ethernet Intel FPGA IP Core
4. F-Tile Low Latency 100G Ethernet Intel® FPGA IP Parameters x
4.1. Main Tab Options 4.2. Analog Parameter Tab Options
5. Functional Description x
5.1. F-Tile Low Latency 100G Ethernet Intel® FPGA IP Functional Description 5.2. User Interface to Ethernet Transmission
5.1. F-Tile Low Latency 100G Ethernet Intel® FPGA IP Functional Description x
5.1.1. F-Tile Low Latency 100G Ethernet Intel® FPGA IP TX MAC Datapath 5.1.2. 100 GbE TX PCS 5.1.3. F-Tile Low Latency 100G Ethernet Intel® FPGA IP Core RX MAC Datapath 5.1.4. Link Fault Signaling Interface 5.1.5. 100 GbE RX PCS 5.1.6. Flow Control
5.1.1. F-Tile Low Latency 100G Ethernet Intel® FPGA IP TX MAC Datapath x
5.1.1.1. Frame Padding 5.1.1.2. Preamble Insertion 5.1.1.3. Inter-Packet Gap Generation and Insertion 5.1.1.4. Frame Check Sequence (CRC32) Insertion
5.1.3. F-Tile Low Latency 100G Ethernet Intel® FPGA IP Core RX MAC Datapath x
5.1.3.1. IP Core Preamble Processing 5.1.3.2. IP Core Malformed Packet Handling 5.1.3.3. Length/Type Field Processing
5.1.3.3. Length/Type Field Processing x
5.1.3.3.1. Length Checking 5.1.3.3.2. RX CRC Checking and Dynamic Forwarding
5.1.6. Flow Control x
5.1.6.1. TX Pause/PFC Flow Control Frame Transmission Request 5.1.6.2. XON/XOFF Pause Frames
5.2. User Interface to Ethernet Transmission x
5.2.1. Order of Transmission 5.2.2. Bit Order For TX and RX Datapaths
7. Interfaces and Signal Descriptions x
7.1. TX MAC Interface to User Logic 7.2. RX MAC Interface to User Logic 7.3. Transceivers 7.4. Transceiver Reconfiguration Signals 7.5. Avalon Memory-Mapped Management Interface 7.6. Miscellaneous Status and Debug Signals 7.7. Flow Control Signals 7.8. Clock Signals 7.9. Reset Signals
8. Control, Status, and Statistics Register Descriptions x
8.1. TX MAC Registers 8.2. RX MAC Registers 8.3. Pause/PFC Flow Control Registers 8.4. Statistics Registers 8.5. Hard IP Registers
8.4. Statistics Registers x
8.4.1. Statistics Registers
1. About the F-Tile Low Latency 100G Ethernet Intel® FPGA IP User Guide
2. About this IP
3. Getting Started
4. F-Tile Low Latency 100G Ethernet Intel® FPGA IP Parameters
5. Functional Description
6. Reset
7. Interfaces and Signal Descriptions
8. Control, Status, and Statistics Register Descriptions
9. Document Revision History for the F-Tile Low Latency 100G Ethernet Intel® FPGA IP User Guide

5.1.6.1. TX Pause/PFC Flow Control Frame Transmission Request

An XON/XOFF request triggers the IP core to transmit a Pause or PFC flow control frame on the Ethernet link. You can control XON/XOFF requests using the TX flow control registers or the pause_insert_tx0 and pause_insert_tx1 input signals.

You can specify whether the IP core accepts XON/XOFF requests in 1-bit or 2-bit format by updating the TX Flow Control Request Mode register field. By default, the IP core assumes 1-bit requests.

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