F-Tile Architecture and PMA and FEC Direct PHY IP User Guide

ID 683872
Date 7/08/2024
Public
Document Table of Contents

5.7.1. PAM4 Encoding Schemes in Simulation

When simulating the FGT or FHT transceivers in PAM4 mode, the following tables represent the encoding schemes for the positive (_p) and negative (_n) serial lines:
Table 111.  FGT PAM4 Encoding Scheme
Non-Gray Input MSB, LSB Gray Input MSB, LSB Simulation Output for P, N
11 10 1, Z
10 11 1, 0
01 01 0, Z
00 00 0, 1
Table 112.  FHT PAM4 Encoding Scheme
Input MSB, LSB Simulation Output for P, N
11 11
10 10
01 01
00 00