How to start STM32F767ZI Nucleo board when connected to an external 5 VDC power supply ? I set JP3 to E5V, when I switch on the 5 VDC external power, green led LD6 PWR goes on but I have to press the reset button B2 to start the program running.

[jea74]

Not clear if I have to remove SB111 (only if powered with 3.3 VDC according manual)

So, how to make the board running its program without user intervention when it is powered via E5V (pin 6 and 8 of CN11)

Thank you, J.

[Simon.T]

Hi @jea74​ ,

If you supplied the MCU externally and the ST link is not supplied, you will need to remove the SB111 to remove the link between the ST-link reset and the MCU.

In fact if the ST-link is not supplied the reset line is LOW by default. It's the same for all nucleo board. If you want to use the MCU without the ST link you always need to find the solder bridge or jumper that makes the link between them.

Regards,

Simon