Intel® Arria® 10 Transceiver PHY User Guide

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ID 683617
Date 3/28/2022
Public
Document Table of Contents

5.3.1.3.4. 8B/10B Encoder Current Running Disparity Control Feature

The 8B/10B encoder performs a running disparity check on the 10-bit output data. The running disparity can also be controlled using tx_forcedisp and tx_dispval. When the PCS-PMA interface width is 10 bits, tx_forcedisp and tx_dispval are one bit each. When the PCS-PMA interface width is 20 bits, tx_forcedisp and tx_dispval are two bits each. The LSB of tx_forcedisp and tx_dispval corresponds to the LSByte of the input data and the MSB corresponds to the MSByte of the input data.

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