Hello!
Just another comment:
MSP430 is aimed at low power systems. It's not designed to use external memory.
At least not with an EMIF-like interface. That said, you can create an EMIF-like interface, but it will
be extremely inefficient. If you want to attach external memory, then use a serial memory in SPI.
But be aware that operation that you usually do with memory (ex move data from memory to register)
will be extremely slow compared to internal RAM.
Dora.