Hands-On RTOS with Microcontrollers

ROM

Read-only memory (ROM) is a fairly large differentiating factor for MCUs in the same family, with ROM size being strongly correlated to price. Depending on the number of different models available in a product family, there could be multiple MCUs with very similar peripheral sets. These MCUs will likely share the same physical footprint but have significantly different amounts of memory. If your application is cost-sensitive but the required ROM is unknown, consider the following approach:

1. Select an MCU family that provides multiple flash sizes in a compatible footprint.
2. Start development with the MCU that has the most ROM in the family. This provides the most flexibility for adding features.
3. After the final image size is known, the ...