V-Series Transceiver PHY IP Core User Guide

ID 683171
Date 7/26/2022
Document Table of Contents

9.13.2. Phase 1

During Phase 1 of equalization process, the link partners exchange FS (Full Swing) and LF (Low Frequency) information. These values represent the upper and lower bounds for the TX coefficients. The receiver uses this information to calculate and request the next set of transmitter coefficients.
  1. Once training sets with EC bits set to 1’b0 are captured on all lanes, the upstream component moves to EQ Phase 2 sending EC=2’b10 along with starting pre-cursor, main cursor, and post-cursor coefficients.
  2. The downstream component detects these new training sets, and moves to EQ Phase 2.