These are not official test images for the RK33xx platform.
After writing the image, you must correctly configure the DTB used in the file uEnv.txt
Version 20191125 kernel 5.
Images rk3328 and r3399 are universal, when starting from USB media images are interchangeable (the only difference is used for the image u-boot and UART console output settings). Tar archives for updating are also universal.
Note that the new generic images now use a single download directory.
Important. Changed the directory location of the images. Now all images (for all supported platforms) are in one place.
Old (not support_