L- and H-Tile Transceiver PHY User Guide

ID 683621
Date 7/20/2022
Public
Document Table of Contents

2.4.4.2.1. PRBS Soft Accumulators Use Model

You can select the Enable PRBS soft accumulators option by clicking Dynamic Reconfiguration > Optional Reconfiguration Ports. Refer to the Logical View of the L-Tile/H-Tile Transceiver Registers for the necessary register sequences to use the soft accumulators. The Transceiver Toolkit also provides an easy way to use the PRBS generator and verifier along with the PRBS soft accumulators.

PRBS soft accumulators are word-based counters. The value read from the PRBS soft accumulators represents the number of words counted. Therefore, to obtain the total accumulated bits, you must multiply the value read from the accumulated bits passed through the count [49:0] registers with the width of the PCS-PMA interface. For accumulated error count [49:0] registers, it counts 1 provided that there are bit errors in a word (either one bit in a word is erroneous or all the bits in a word are erroneous). Because of this, the accumulated error count [49:0] registers do not provide absolute bit errors counted. For each count, the absolute bit errors can range from one to the width of the PCS-PMA interface.

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