This video provide an quick review about how to unlock KEIL simulation debugging mode for the STM32F5, NXP and TI and all new ARM yP based micro controller as 2019.
I shared shortly in this video about the STM32F4Discovery board based on the STM32F407VGTx yC
Let me add the link for the bord datasheet:
https://www.st.com/content/ccc/resour...
The uC datasheet:
https://www.st.com/content/ccc/resour...
A link if you wish buy the board (Apologies the price got higher than before) as now it is around 40 dollars:
https://www.amazon.com/STM32F4DISCOVE...