ARM Cortex-M4 128KBbyte Flash Controller
ST Micro
http://www.st.com/en/microcontrollers/stm32f401cb.html
http://www.st.com/resource/en/datasheet/stm32f401cb.pdf
Schematic Layout Generator Circuit Tree App
--add_component[u1][stm32f401CBU6]
--add_block[led]
--add_block[uart_to_usb]