Triple-Speed Ethernet Intel® FPGA IP User Guide

ID 683402
Date 11/25/2022

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Document Table of Contents Collision Detection

A collision happens when non-idle frames are received from the PHY and transmitted to the PHY simultaneously. Collisions can be detected only in SGMII and half-duplex mode.

When a collision happens, the collision detection state machine drives the mii_rx_col and led_col signals to 1. You can use the led_col signal as a visual check using a board LED.