The STM32F051 line offers devices with 16 kB to 64 kB of Flash and packages from thirty-two pins up to sixty-four pins. Future extension of the series will extend the portfolio up to 128 kB of embedded Flash. A small 20-pin package with low-density 16 kB memory will also be available in the near future. The STM32 F0 portfolio gives the customer a broad choice of devices so they can find the right product from among the thirteen derivatives. This allows greater development freedom on the platform so the application can be upgraded, by taking a bigger package or larger memory size, or a richer set of peripherals without major design changes.