Details:
https://en.wikipedia.org/wiki/STM32
http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/REFERENCE_MANUAL/CD00171190.pdf (e.g. chapter 31.7: "JTAG debug port")
'''
Details:
https://en.wikipedia.org/wiki/STM32
http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/REFERENCE_MANUAL/CD00171190.pdf (e.g. chapter 31.7: "JTAG debug port")
'''