ARM Cortex-M0 128KBbyte Flash Controller
ST Micro
http://www.st.com/en/microcontrollers/stm32f091rb.html
http://www.st.com/resource/en/datasheet/stm32f091rb.pdf
Schematic Layout Generator Circuit Tree App
--add_component[u1][stm32f091rbt6]
--add_block[led]
--add_block[uart_to_usb]