MINI for STM32 are a small ARM® Cortex™-M0/M4 development boards containing STM32F051R8/STM32F415RG microcontroller.
This form factor perfectly fits into standard DIP40 sockets. Boards are equipped with 16MHz SMD crystal oscillator, and 32.768KHz crystal which can be used for internal RTCC module. It has reset button and three signal LEDs. Board comes preprogrammed with fast USB HID bootloader, so no external programmers are needed for development. It operates on 3.3V power supply. On-board voltage regulator allows the board to be powered directly from USB cable.