Article ID: 000084936 Content Type: Troubleshooting Last Reviewed: 06/06/2014

Is the internal configuration oscillator in Cyclone III or Cyclone IV devices turned off once the device enters user mode?

Environment

BUILT IN - ARTICLE INTRO SECOND COMPONENT
Description

By default, the configuration oscillator in Cyclone III or Cyclone IV devices is disabled once configuration and initialization is complete and the device has entered user mode.

However, if  user mode CRC Error Detection  is enabled and/or you are using the Remote Update Configuration feature in your design, the oscillator will be enabled during user mode.

Related Products

This article applies to 3 products

Cyclone® III FPGAs
Cyclone® IV E FPGA
Cyclone® IV GX FPGA

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