Running STM32F4 Discovery board on 1.8 Volt

[Mostafa B]

Posted on March 03, 2018 at 21:15

I need to run the board on 1.8 v.

I found

https://www.eevblog.com/forum/microcontrollers/using-stm32f4-discovery-board-on-1-8-volt/

thread about the changes need to be made to the board. However, it is not clear to me how to:

1. Program the board when on 1.8 v, using JLink v8. Do I need to perform any hardware modification or can I connect the programmer using SWD pins directly to the board.
2. Use UART

Has anybody had any experience with running STM32F4 microcontrollers  on 1.8 v?

#stm32f4 #1.8v

[Andrew Neil]

Posted on March 03, 2018 at 22:26

1. Program the board when on 1.8 v, using JLink v8. Do I need to perform any hardware modification

Surely, a look at the schematic would answer that?

1. Use UART

A UART is a UART - its operation doesn't change with voltage...

[Bogdan Golab · Accepted solution]

Posted on March 03, 2018 at 22:38

MAybe logic levels should be taken into account when connecting uart to external circuitry (level shifter might be needed):

[Bogdan Golab]

Posted on March 03, 2018 at 22:43

Forgot to add a link:

http://homepage.cem.itesm.mx/carbajal/Microcontrollers/SLIDES/GPIO_Applications.pdf

 

[Mostafa B]

Posted on March 04, 2018 at 15:56

Thank you.

It seems that connecting the Micro's UART (@1.8v ) to an external TTL UART (@3.3) will not work.

I am going to use 1.8-to-3.3 level shifter.