NUCLEO-F411: need to reset the board to make the program to start

[AMAL01]

Hello,

NUCLEO-F411RE JP5 in E5V reset

When my F411RE board is powered with 5V, I have to press the reset button to start it. Why doesn't it start? Thank you for your help.

[mƎALLEm]

Hello @AMAL01 and welcome to the ST community,

Did you refer to UM1724 ? this section?:

[Ozone]

> When my F411RE board is powered with 5V, ...

What do you mean here exactly ?
Through the USB / ST-Link, or a 5V header pin ?
Check the user manual what power supply methods are allowed and what conditions apply.
Here a section from a Nucleo-32 manual of mine :

> Why doesn't it start?

How do you know it's 'started' or 'not started' ?

[AMAL01]

Hello,

I have a display I2C.

[AMAL01]

Hello,

Power supply to CN7-6 (E5V)

JP5 to E5V (left)

JP1 not connected

I do not want to connect the USB (CN1)