Article ID: 000085796 Content Type: Troubleshooting Last Reviewed: 09/11/2012

Are all the input clock frequency values in the ALTGX MegaWizard Plug-In Manager supported if a transceiver channel is configured in SONET/SDH OC12 functional mode?

Environment

BUILT IN - ARTICLE INTRO SECOND COMPONENT
Description

The ALTGX MegaWizard® Plug-In Manager in the Quartus® II software version 9.0 for Stratix®  IV GX and Arria®  II GX devices provides options to select multiple input clock frequency values for SONET/SDH OC12 functional mode, but some of these values are incorrect.

 

The values displayed are 311.04 MHz, 77.76 MHz, 62.208 MHz, 622.08 MHz, 155.52 MHz, 124.416 MHz, 248.832 MHz, and 497.664 MHz. The input reference clock frequency values 124.416 MHz, 248.832 MHz, and 497.664 MHz displayed by the ALTGX Megawizard Plug-in Manager are incorrect and are not supported.

 

Do not select values 124.416 MHz, 248.832 MHz, or 497.664 MHz if you configure a Stratix IV GX or Arria II GX design in SONET/SDH OC12 functional mode.

 

These incorrect values will be removed from the wizard in a future version of the Quartus II software.

Related Products

This article applies to 1 products

Stratix® IV GX FPGA

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