...
SD boot (Dip-Switch) [S3 = {1:off, 2:off, 3:off,4-5: N/C, 6:on}]
eMMC boot (Dip-Switch) [S3 = {1:off, 2:on, 3:off,4-5: N/C, 6:off}]
Serial Downloader (Dip-Switch) [S3 = {1:off, 2:on, 3:on,4-5: N/C, 6:off}]
...
SD boot (Dip-Switch) [S3 = {1:off, 2:off, 3:off,4-5: N/C, 6:on}]
eMMC boot (Dip-Switch) [S3 = {1:off, 2:on, 3:off,4-5: N/C, 6:off}]
Serial Downloader (Dip-Switch) [S3 = {1:off, 2:on, 3:on,4-5: N/C, 6:off}]