Cyclone V Device Handbook: Volume 2: Transceivers

ID 683586
Date 10/24/2018
Public
Document Table of Contents

5.1.2.1. Rate Match FIFO Behaviors in Custom Single-Width Mode

The different operations available in custom single-width mode for the rate match FIFO are symbol insertion, symbol deletion, full condition, and empty condition.
Table 59.  Rate Match FIFO Behaviors in Custom Single-Width Mode (10-bit PMA–PCS Interface Width)
Operation Behavior
Symbol Insertion Inserts a maximum of four skip patterns in a cluster, only if there are no more than five skip patterns in the cluster after the symbol insertion.
Symbol Deletion Deletes a maximum of four skip patterns in a cluster, only if there is one skip pattern left in the cluster after the symbol deletion.
Full Condition Deletes the data byte that causes the FIFO to go full.
Empty Condition Inserts a /K30.7/ (9'h1FE) after the data byte that caused the FIFO to go empty.