E-Tile Transceiver PHY User Guide

ID 683723
Date 9/30/2022
Document Table of Contents

4.2.8. PMA Direct High Data Rate (FEC Off)

The figure below shows the clocking scheme for a channel used in a 53.125Gbps PAM4 mode without FEC. For Core Interface FIFOs in Phase Compensation mode, connect half-rate tx_clkout (415.0390625 MHz) to tx_coreclkin and half-rate rx_clkout (415.0390625 MHz) to rx_coreclkin. If you use any other source for tx_coreclkin or rx_coreclkin, make sure tx_coreclkin and rx_coreclkin have 0 PPM difference with tx_clkout and rx_clkout, respectively.

Figure 74. PMA Direct High Data Rate (FEC Off)

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