Re: [EE] 5V ARM chips

You haven't mentioned it explicitly, so maybe I will point out that
the mentioned STM32F050 has 5V-tolerant I/O pins.  So only the micro
itself needs a 3.3V supply.

If the outputs need to swing all the way to +5 V, you can set them as
open-drain and pull up to 5 V.  Otherwise, a 3.3 V output signal is
good enough for TTL-compatible 5 V stuff.

You have to be a little cautious because not all pins on every STM32
are 5V-tolerant.  The "I/O structure" column in the datasheet's "pin
assignment chart" is the decoder ring for this.

Regards,
Mark
markrages@gmail

On Fri, Dec 6, 2024 at 12:00 AM Bob Blick <[email protected]> wrote:
>
> I use STM32 mcu's whenever possible, but sometimes I need to deal with 5 volt logic. I am happy with the ST ecosystem. Not interested in NXP or Atmel offerings. But recently I bumped into a device that uses a MindMotion MM32SPIN05PT mcu. It has a lot of similarity to an STM32F050, and it will run up to 5V. But my Chinese is poor, so navigating their website is painful. Can anyone help me out here? I assume that they have a patch to allow the STMCubeIDE to work. That would be fantastic. Also, these parts are under US$60 for 100 pieces.
>
> Thanks, Bob
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Regards,
Mark
markrages@gmail

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