[GOETZING]

In table 1-3 "DDR3 SDRAM HPC and HPC II Features" on page 1-4 of the "DDR3 SDRAM High-Performance Controller and ALTMEMPHY IP User Guide", it states that the HPC II will allow the user to perform "Optional run-time configuration of size and mode register settings, and memory timing". I am using an HPC II/ALTMEMPHY combination, and would like to write the DDR3 Mode Registers during run time for testing purposes. I can find no documentation on how to do this, and looking at the example driver and HPC II interface shows no obvious way of doing this.

I am using a Stratix IV device.

How do I write the DDR3 mode registers during run time with values that I provide that may be different from the values used when the HPC II was created with MegaWizard?

Thanks.