How to connect to burn program using USART on NUCLEO-C031C6?

[LiuchiChung]

I want to use USART to burn a program to my NUCLEO-C031C6 development board. How do I connect the necessary components?

[Uwe Bonnes]

Carefully study AN2606. If you have a working development board with C032 try the bootlaoder there first.