01-17-2018, 01:25 PM
you might also want to look at page 9 of the box_ref , it shows U800C/U800D as the emmc/tf/sd card line out. sdcard is 4bit/emmc 8 bit. as far as why companies do things the most common is economics. but it looks to me like the emmc/sdcard controller is on the rockchip itself and not a separate chip. so being that 3328 is one of the economy models of the chip line it would not make much sense to have the same speeds as the 3399 which is right at the top.
