Stratix® V Device Handbook: Volume 1: Device Interfaces and Integration

ID 683665
Date 10/18/2023
Document Table of Contents

5.6.2. Programmable Output Slew Rate Control

Programmable output slew rate is available for single-ended I/O standards and emulated LVDS output standards.

The programmable output slew rate control in the output buffer of each regular- and dual-function I/O pin allows you to configure the following:

  • Fast slew rate—provides high-speed transitions for high-performance systems. Fast slew rates improve the available timing margin in memory-interface applications or when the output pin has high-capacitive loading.
  • Slow slew rate—reduces system noise and crosstalk but adds a nominal delay to the rising and falling edges.

You can specify the slew rate on a pin-by-pin basis because each I/O pin contains a slew rate control.

Note: Altera recommends that you perform IBIS or SPICE simulations to determine the best slew rate setting for your specific application.