I'll modify this schematic to include NAND
https://raw.githubusercontent.com/OLIMEX/OLINUXINO/master/HARDWARE/A13-OLinuXino-MICRO/A13-OLinuXino-MICRO_Rev_A.sch.pdf
The $9 A13 module (R8) uses POP (package on package) with DDR3 and NAND in the same package as the A13.
http://en.wikipedia.org/wiki/Package_on_package