Article ID: 000081252 Content Type: Troubleshooting Last Reviewed: 08/01/2013

Is the Quartus II software generated .pin file correct in stating that VCCBAT must be connected to 1.2V for Cyclone V devices?

Environment

BUILT IN - ARTICLE INTRO SECOND COMPONENT
Description

When you compile a Cyclone® V design, the Quartus® II software generated .pin file states VCCBAT should be connected to a 1.2V power supply. This is only one of multiple supported voltages if you are using the design security feature with volatile key.  Allowable voltages for VCCBAT are 1.2V ~ 3.0V from a battery power supply. 

If you do not use the volatile key (either you use the non-volatile key or you do not use the design security feature), you should connect VCCBAT to a 1.5V, 2.5V or 3.0V power supply on your board. You should not leave VCCBAT floating or connect to GND because the device will not exit power-on reset (POR) if VCCBAT stays at logic LOW. 

Resolution

Ensure VCCBAT is connected to the correct power supply. Follow the Cyclone V Device Family Pin Connection Guidelines (PDF).

Related Products

This article applies to 6 products

Cyclone® V E FPGA
Cyclone® V GT FPGA
Cyclone® V GX FPGA
Cyclone® V SX SoC FPGA
Cyclone® V SE SoC FPGA
Cyclone® V ST SoC FPGA

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