Description
Due to a problem in the Intel® Quartus® Prime software versions 18.1 and earlier, the Intel® Stratix® 10 and the Intel Arria® 10 QDR-IV IP can only support a burst length of one at the Avalon Memory-Mapped interface. This is to avoid the QDR-IV banking policy across Port A and Port B for better bus efficiency.
Resolution
This problem is planned to be fixed in a future version of the Intel® Quartus® Prime software.