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Jems On
Jems On
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March 28, 2018
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UART output voltage information [STM32F413]

  • March 28, 2018
  • 2 replies
  • 1800 views
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 !

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    2 replies

    Tesla DeLorean
    Tesla DeLorean
    Guru
    March 28, 2018
    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...

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    Tesla DeLorean
    Tesla DeLoreanBest answer
    Guru
    March 28, 2018
    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

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