Article ID: 000075728 Content Type: Troubleshooting Last Reviewed: 09/11/2012

Why can't I reconfigure the ALTGX instance in Stratix IV GX/GT and Arria II GX devices, when I enable both "Data Rate Division in TX" and "Channel and TX PLL select/reconfig" modes in the ALTGX_RECONFIG block?

Environment

  • Arria® II GX FPGA
  • Stratix® IV GX FPGA
  • Stratix® IV GT FPGA
BUILT IN - ARTICLE INTRO SECOND COMPONENT
Description

There is a known software issue when you enable both "Data Rate Division in TX" and "Channel and TX PLL select/reconfig" modes in the ALTGX_RECONFIG block. The channel reconfiguration will not start in both simulation and device.  This issue is associated with Stratix® IV GX/GT and Arria® II GX devices.

The current solution is to enable "illegal mode checking" in ALTGX_RECONFIG instance when both reconfiguration modes are on.  This issue will be fixed in future Quartus® II software versions.  

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