UART output voltage information [STM32F413]

[Jems On]

Posted on March 28, 2018 at 11:45

Hi !

I'm currently using STM32F413 uC.

I can not find on the datasheet (and the reference manual) the output voltages of UART pins (or even GPIO).

The voltage of course depends on the supply voltage.

I'm currently powering my microcontroller with a voltage of 3.3V but my output signals on the UART pin are 1.8V...

Where can I find this information?

Thanks in advance !

[Tesla DeLorean]

Posted on March 28, 2018 at 12:56

Should be a VOH value in data sheet.

If you have two transmit pins connected to each other they can fight. Some chips have a secondary VDDIO, and require Bank G to be enabled.

Will go skim the data sheet...

[Tesla DeLorean · Accepted solution]

Posted on March 28, 2018 at 13:00

http://www.st.com/content/ccc/resource/technical/document/datasheet/group3/f6/1d/4a/d9/f9/96/43/2a/DM00282249/files/DM00282249.pdf/jcr:content/translations/en.DM00282249.pdf