Very few of the MSP430s actually use FRAM, last I checked -- it's limited in both size and speed. (My understanding is that the FRAM speed is substantially bett

Very few of the MSP430s actually use FRAM, last I checked -- it's limited in both size and speed. (My understanding is that the FRAM speed is substantially better than Flash speed, but they treat it like SRAM for XIP, with I think two cycle waits up to 25 MHz or something, vs Flash where the expectations for XIP are much lower, so higher clock speeds are supported with more wait states.) The family is split between Flash (the majority) and the FRAM parts.