Intel® Stratix® 10 General Purpose I/O User Guide

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ID 683518
Date 7/07/2021
Public
Document Table of Contents

2.5.1. Single-Ended I/O Termination

Voltage-referenced I/O standards require an input VREF and a termination voltage (VTT). The reference voltage of the receiving device tracks the termination voltage of the transmitting device.

The supported I/O standards such as SSTL-12, SSTL-125, SSTL-135, and SSTL-15 typically do not require external board termination.

Intel recommends that you use OCT with these I/O standards to save board space and cost. OCT reduces the number of external termination resistors used.

Note: You cannot use RS and RT OCT simultaneously. For more information, refer to the related information.
Figure 15. SSTL I/O Standard TerminationThis figure shows the details of SSTL I/O termination on Intel® Stratix® 10 devices.


Figure 16. HSTL I/O Standard TerminationThis figure shows the details of HSTL I/O termination on the Intel® Stratix® 10 devices.


Figure 17. POD I/O Standard TerminationThis figure shows the details of POD I/O termination on the Intel® Stratix® 10 devices.


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