JESD204B Intel® FPGA IP User Guide

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ID 683442
Date 5/18/2022
Public
Document Table of Contents

2.3. Datapath Modes

The JESD204B IP supports TX-only, RX-only, and Duplex (TX and RX) mode. The IP is a unidirectional protocol where interfacing to ADC utilizes the transceiver RX path and interfacing to DAC utilizes the transceiver TX path.

The JESD204B IP generates a single link with a single lane and up to a maximum of 8 lanes. If there are two ADC links that need to be synchronized, you have to generate two JESD204B IP cores and then manage the deterministic latency and synchronization signals, like SYSREF and SYNC_N, at your custom wrapper level.

The JESD204B IP supports duplex mode only if the LMF configuration for ADC (RX) is the same as DAC (TX) and with the same data rate. This use case is mainly for prototyping with internal serial loopback mode. This is because typically as a unidirectional protocol, the LMF configuration of converter devices for both DAC and ADC are not identical.

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