Yes, the timing models for the LVDS SERDES have been updated for Stratix® III devices since the release of the Quartus® II software version 8.1. The SERDES-to-core transfer was incorrectly modelled in the Quartus II software versions 8.1 and later. Transfers from the SERDES core registers (<LVDS instance name>|rx[*] or similar) to core registers (<LVDS instance name>|rxreg[*] or similar) will be impacted by this change. Designs using the LVDS/DPA receiver should install the applicable patch available on the link below. After the patch has been installed, a static timing analysis should be rerun on the design. This will ensure that no timing violations have occurred due to the model update. If a timing violation occurs a recompilation of the design is recommended.
This model update impacts LVDS instances in non-DPA mode. LVDS instances in DPA mode are not impacted by this model update.
This update impacts all Stratix III devices.
A patch is available for specific versions of the Quartus II software that will update the timing models.
For the Quartus II software version 9.1 SP2, download and install Patch 2.21 from the appropriate link below.
- For Windows:
- For Linux:
For the Quartus II software version 9.1 SP1, download and install Patch 1.62 from the appropriate link below.
- For Windows:
- For Linux:
For the Quartus II software version 9.1, download and install Patch 0.89 from the appropriate link below.
- For Windows:
- For Linux:
For the Quartus II software version 9.0 SP2, download and install Patch 2.118 from the appropriate link below.
- For Windows:
- For Linux:
For the Quartus II software version 9.0 SP1, download and install Patch 1.40 from the appropriate link below.
- For Windows:
- For Linux:
For the Quartus II software version 9.0, download and install Patch 0.56 from the appropriate link below.
- For Windows:
- For Linux:
For the Quartus II software version 8.1, download and install Patch 0.71 from the appropriate link below.
- For Windows:
- For Linux:
The Quartus II software version 10.0 contains the updated timing models and no patches are required for this version.