Intel® Cyclone® 10 GX Transceiver PHY User Guide

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

3.2.2. Receiver Input Pins

Receiver input pins can be used as an input reference clock source to transceiver PLLs. However, they cannot be used to drive core fabric.

The receiver input pin drives the feedback and cascading clock network, which can then feed any number of transmitter PLLs on the same side of the device. When a receiver input pin is used as an input reference clock source, the clock data recovery (CDR) block of that channel is not available. As indicated in Figure 122, only one RX differential pin pair per three channels can be used as an input reference clock source at any given time.