16Gb DDR4 memory device’s datasheets may show a tRFC1 (refresh to activate or refresh command period) timing parameter requirement greater than 350ns.
Due to a problem in the Intel® Stratix® 10 DDR4 EMIF IP hard controller, if the DDR4 IP tRFC parameter on the Mem Timing tab is set to a value greater than 350ns, it may not operate correctly and can cause memory test data errors.
There is no IP error message shown when using the EMIF IP in the Intel Quartus® Prime Pro Edition Software earlier than version 20.3.
Starting from the Intel Quartus Prime Pro Edition Software version 20.3 and EMIF IP version 19.2.2, the following error message is displayed:
Error: The current device family supports a maximum tRFC value of 350ns, but the current value is 550.0. Please contact Intel for support.