Low Latency 40- and 100-Gbps Ethernet MAC and PHY MegaCore Function User Guide

ID 683628
Date 12/28/2017
Document Table of Contents Conditions Triggering XON Frame Transmission

The TX MAC transmits XON frames when one of the following conditions occurs:

  • Client requests XON transmission—A client can explicitly request that XON frames be sent using the pause control interface signal. When pause_insert_tx is de-asserted, an XON frame is sent to the Ethernet network when the current frame transmission completes.
  • Host (software) requests XON transmission— Resetting the pause request register triggers a request that an XON frame be sent.