Article ID: 000084284 Content Type: Troubleshooting Last Reviewed: 01/01/2015

Why does rx_freqlocked signal get stuck high when there is no data or rx_signaldetect toggles when data is present on Cyclone IV GX devices?

Environment

  • Cyclone® IV GX FPGA
BUILT IN - ARTICLE INTRO SECOND COMPONENT
Description

You may observe these unexpected rx_freqlocked and rx_signaldetect signal behaviors due to incorrect Signal Detect circuit settings in Quartus® II 10.1 software for Cyclone® IV GX devices.  To workaround this issue, install the following patch, re-generate the Megawizard™ files and re-compile the design.

 

Download: 

  • Download the version 10.1 patch 0.08 for Windows (.exe)
  • Download the version 10.1 patch 0.08 for Linux (.tar)
  • Download the Readme for the Quartus II software version 10.1 patch 0.08 (.txt)

Disclaimer

1

All postings and use of the content on this site are subject to Intel.com Terms of Use.