Intel® Cyclone® 10 GX Transceiver PHY User Guide

ID 683054
Date 4/14/2023
Public
Document Table of Contents

5.2.2.10.6. Idle Insertion

Idle insertion occurs in groups of 8 Idles when the rx_enh_fifo_pempty flag is deasserted. Idles can be inserted following Idles or OS. Idles are inserted in groups of 8 bytes. Data shifting is not necessary. There is a synchronous status rx_enh_fifo_insert signal that is attached to the 8-byte Idles being inserted.

Table 183.  Cases Where Two Idle Words are InsertedIn this table X=don’t care, S=start, OS=order set, I-DS=idle in data stream, and I-In=idle inserted. In cases 3 and 4, the Idles are inserted between the LW and UW.
Case Word Input Output
1 UW I-DS I-DS I-In
LW X X I-In
2 UW OS OS I-In
LW X X I-In
3 UW S I-In S
LW I-DS I-DS I-In
4 UW S I-In S
LW OS OS I-In
Figure 193. IDLE Word InsertionThis figure shows the insertion of IDLE words in the receiver data stream.