AN 846: Intel® Stratix® 10 Forward Error Correction

ID 683805
Date 7/02/2018
Document Table of Contents KR FEC TX Gearbox

The KR FEC TX gearbox converts 65-bit input words into 64-bit output words to interface the KR FEC encoder with the PMA. This gearbox is different from the TX gearbox used in the Enhanced PCS.

The KR FEC TX gearbox aligns with the FEC block. Because the encoder output (also the scrambler output) has its unique word size pattern, the gearbox is specially designed to handle that pattern.