如何在微控制器上使用外部存储器?

In the past, I've worked a lot with 8 bit AVR's and MSP430's where both the RAM and flash were stored on the chip directly. When you compile and download your program, it sort of "just works" and you don't need to worry about where and how variables are actually stored.In the past, I've worked a lot with 8 bit AVR's