Arria® V Device Handbook: Volume 2: Transceivers

ID 683573
Date 5/29/2020
Document Table of Contents

5.1.2. Rate Match FIFO in Custom Configuration

In a custom configuration, the 20-bit pattern for the rate match FIFO is user-defined. The FIFO operates by looking for the 10-bit control pattern followed by the 10-bit skip pattern in the data, after the word aligner restores the word boundary. After finding the pattern, the FIFO performs a skip pattern insertion or deletion to ensure that the FIFO does not underflow or overflow a given parts per million (ppm) difference between the clocks.

The rate match FIFO operation requires 8B/10B-coded data.