Refer to the PDF data sheet for device specific package drawings
The following bottom balls are not pinned out: AF7, AF10, AF13, AF16, AF19, AE4, AE25, AB26, W3, W26, T3, T26, N3, N26, K3, K26, G3, D4, D25, C10, C13, C16, C19, C22.
These balls do not exist on the package.
The following bottom balls are not connected: AH11, AH12, AG2, AG8, AG11, AG12, AF4, AF6, AF8, AF9, AE3, AE5, AE6, AE8, AE9, AD3, AD8, AD9, Y15, Y16, V18, V19, U18, U19, U22, U23, U24, U25, U26, U27, U28, T22, T23, T27, T28, R20, R22, R23, R24, R25, R26, R27, R28, P19, P22, P23, P24, P25, P26, P27, N20, N22, N23, N27, N28, M20, M21, M22, M23, M24, M25, M26, M27, M28, L20, L21, L22, L23, L24, L25, L26, L27, L28, K20, K21, K22, K23, K27, K28, J20, J21, J22, J23, J24, J25, J26, J27, H20, H21, H22, H23, H24, H25, H26, H27, H28, G22, G23, G24, G25, G26, G27, G28, F24, F25, F26, F27, F28, E24, E26, E27, E28.
These balls can be connected as desired, including to VSS. For users designing DRA74x / DRA75x compatible PCB, please refer to DRA75x/DRA74x Data Manual for appropriate requirements.