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The 16-bit MSP430 and the 32-bit SimpleLink MSP432 microcontroller (MCU) families complement each other in low-power and performance. The goal of this migration guide is to help developers accurately assess the effort to migrate an existing application from the 16-bit MSP430 to the 32-bit SimpleLink MSP432 ARM platform if they so choose to. Ultimately, the migration guide is built to help derive a migration strategy with complete hardware and software coverage that properly migrates the existing application without introducing bugs due to platform differences while still taking advantage of the unique features or performance improvements that the 32-bit MSP432 devices bring. Having a good understanding of how each hardware or software component should be migrated or retained, developers can correlate these components back into their specific use in their system, and accurately assess the overall migration effort required for the entire application.