Double Data Rate I/O (ALTDDIO_IN, ALTDDIO_OUT, and ALTDDIO_BIDIR) IP Cores User Guide

ID 683148
Date 6/19/2017
Document Table of Contents

1.2.3. High-Speed Interface Applications

High-speed interface applications use various differential standards, such as LVDS, LVPECL, PCML, or HyperTransport technology to transfer data.

These standards often use DDR data. Stratix® series devices implement high-speed standards either by using the dedicated differential I/O SERDES blocks or by bypassing SERDES and using the DDR I/O circuitry in SERDES bypass mode. DDR IP cores, PLLs, and shift registers are all used in SERDES functionality.