Key Features

STM32F051R8T6 microcontroller featuring 64 KB Flash, 8 KB RAM in an LQFP64 package

On-board ST-LINK/V2 with selection mode switch to use the kit as a standalone ST-LINK/V2 (with SWD connector for programming and debugging)

Board power supply: through USB bus or from an external 5 V supply voltage

External application power supply: 3 V and 5 V

Four LEDs:

LD1 (red) for 3.3 V power on

LD2 (red/green) for USB communication

LD3 (green) for PC9 output