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This application report is an extension to MSPBoot – Main Memory Bootloader for MSP430 Microcontrollers and describes the implementation of a main-memory resident bootloader for MSP430 FRAM microcontrollers using either universal asynchronous receiver/transmitter (UART) communication or a serial peripheral interface (SPI) bus and CC110x RF transceivers to accomplish over-the-air downloads (OAD). While still being highly flexible and modular, this bootloader maintains a small footprint, making it a very cost-effective solution, and supports the large memory model (devices with a memory footprint greater than 16 KB).