L- and H-Tile Transceiver PHY User Guide

ID 683621
Date 10/05/2023
Public
Document Table of Contents

2.4.2.6. Polarity Inversion

The positive and negative signals of a serial differential link might accidentally be swapped during board layout.

Solutions such as a board re-spin or major updates to the FPGA fabric logic can be costly. The TX and RX data polarity inversion features are available both in the Standard and Enhanced PCS to correct this situation.

The Standard PCS supports both the static and dynamic polarity inversion features. However, the Enhanced PCS only supports the static polarity inversion feature.