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

ID 683375
Date 10/18/2023
Document Table of Contents Mixing Voltage-Referenced and Non-Voltage Referenced I/O Standards

An I/O bank can support voltage-referenced and non-voltage-referenced pins by applying each of the rule sets individually.


  • An I/O bank can support SSTL-18 inputs and outputs, and 1.8 V inputs and outputs with a 1.8 V VCCIO and a 0.9 V VREF.
  • An I/O bank can support 1.5 V standards, 1.8 V inputs (but not outputs), and 1.5 V HSTL I/O standards with a 1.5 V VCCIO and 0.75 V VREF.