Rockchip RK3288 - Page 45

RK3288 Hardware Design Guide
Fig 8-1
 For DDR3, four groups data (GROUP A, B, C, D) can be exchanged in group. Moreover,
each data in GROUP A/B/C/D (eg. DDR0_D0~D7) also can be exchanged with each
other, as shown in Fig 8-2：