Attached "Memory test" can be used to test DDR(or any other memory type or memory mapped peripheral) of BF609 which is performed for all types of accesses (8/16/32 bits) for both core and DMA modes across various combination of clock frequencies on DDR2 and LPDDR. We would suggest you to refer the attached code to run the memory sweep test by modifying code according to your LPDDR configuration.