Article ID: 000074744 Content Type: Troubleshooting Last Reviewed: 02/01/2023

Can I connect VCCIO of I/O bank 1 to 2.5 V for AS configuration with EPCQ or EPCQA device when using Cyclone® III, Cyclone® IV, or Intel® Cyclone® 10 LP device?

Environment

  • Intel® Quartus® Prime Standard Edition
    • BUILT IN - ARTICLE INTRO SECOND COMPONENT
    Description

    No, when you use EPCQ or EPCQA quad-serial configuration device for AS configuration, you cannot connect VCCIO of I/O bank 1 to 2.5 V in Cyclone® III, Cyclone® IV, or Intel® Cyclone® 10 LP device.
    This is because the minimum VOH of the FPGA is insufficient for driving EPCQ or EPCQA input pins.

    Resolution

    Use 3.0 V or 3.3 V for Bank 1 VCCIO in Cyclone III, Cyclone IV, and Intel Cyclone 10 LP devices when AS configuration with EPCQ or EPCQA devices is used.

    Related Products

    This article applies to 6 products

    Cyclone® IV E FPGA
    Cyclone® IV GX FPGA
    Intel® FPGA Configuration Devices
    Cyclone® III LS FPGA
    Cyclone® III FPGAs
    Intel® Cyclone® 10 LP FPGA

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