STM32VLDISCOVERY: STM32 value line Discovery User Manual: http://www.st.com/st-web-ui/static/active/en/resource/technical/document/user_manual/CD00267113.pdf STM32F100RBT6B microcontroller, 128 KB Flash, 8 KB RAM in 64-pin LQFP ST-LINK Two buttons (reset and user), two LEDs, that's it.