Article ID: 000075591 Content Type: Troubleshooting Last Reviewed: 10/13/2016

Why is a floating voltage observed on the 2.5V VCCIO rail during power-up of Cyclone IV GX, Cyclone V, Arria V, Stratix IV or Stratix V devices?

Environment

BUILT IN - ARTICLE INTRO SECOND COMPONENT
Description

If a 2.5V VCCIO power rail is shared with VCCH_GXB in Cyclone® IV GX or Cyclone V devices, or VCC_AUX in Arria® V,  Cyclone V, Stratix® IV or Stratix V devices, a floating voltage may appear on the 2.5V VCCIO rail.

For further details about floating voltages on VCCH_GXB and VCC_AUX, refer to the related solutions.

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This article applies to 19 products

Cyclone® V ST SoC FPGA
Arria® V ST SoC FPGA
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Arria® V GT FPGA
Stratix® IV GX FPGA
Stratix® IV GT FPGA
Cyclone® V E FPGA
Stratix® V E FPGA
Cyclone® V SX SoC FPGA
Cyclone® V GT FPGA
Stratix® V GX FPGA
Cyclone® IV GX FPGA
Stratix® V GT FPGA
Cyclone® V GX FPGA
Stratix® V GS FPGA
Arria® V GZ FPGA
Arria® V SX SoC FPGA
Stratix® IV E FPGA
Cyclone® V SE SoC FPGA

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