25G Ethernet Stratix® 10 Intel® FPGA IP User Guide

ID 683154
Date 6/20/2024
Public
Document Table of Contents

4.1.8.1. 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.