A microelectronic package (10) can include lower and upper package faces (11, 12), lower terminals (25) at the lower package face, upper terminals (45) at the upper package face, first and second microelectronic elements (30) each having memory storage array function, and conductive interconnects (15) each electrically connecting at least one lower terminal with at least one upper terminal. The conductive interconnects (15) can include first conductive interconnects (15a) configured to carry address in formation, signal assignments of a first set (70a) of the first interconnects having (180) rotational symmetry about a theoretical rotational axis (29) with signal assignments of a second set (70b) of first interconnects. The conductive interconnects (15) can also include second conductive interconnects (15b) configured to carry data information, the position of each second conductive interconnect having (180) rotational symmetry about the rotational axis (29) with a position of a corresponding no-connect conductive interconnect (15d).