Since the Beagleboard and the Raspberry Pi use Package-on-Packge for integr= ating Flash and DRAM with the processor SoC I wonder why the FPGA vendors d= o not offer this. There are many FPGA-designs that need external memory and= the pins to the base PCB are valuable resource.=20
Not even Silicon Blue (now lattice) who targeted the mobile market offered = it, as far as I could find.=20 Even though, the offered memories for PoP are limited, every new product th= at integrates with them would expand that spectrum.=20 With the new FPGA-SoCs (Xilinx ZYNC, Altera "SoC FPGA") the issue might cha= nge.=20
Andreas