L- and H-Tile Transceiver PHY User Guide

ID 683621
Date 1/30/2024
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 reference clock network, which can then feed any number of transmitter PLLs on the same tile. 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 Input Reference Clock Sources, only one RX differential pin pair per three channels can be used as an input reference clock source at any given time.