About JChan.12

JChan.12 · 2021-10-11

I'm using a Portenta H7 from Arduino. It hosts the STM32H747 microprocessor. I was wondering if it is safe to use +5 volts for I2C even though the MPU runs at +3.3 volts? To clarify, on how the Portenta H7 is wired up, I'm using the pins associated w...

JChan.12 · 2021-10-11

Thanks for your reply. Arduino varies based on the processor. My Adafruit sensors convert from 3-5 volts to 3.3 volts. That's what I've shown on the right. I was worried that connecting it like this with the STM MPU running at 3.3 volts would cause l...

JChan.12 · 2021-10-11

Thanks for the reply. I think I see what you mean. If the board is off, you shouldn't apply +5 volts to the pins, but when the board is on, it should be okay. I've posted the Portenta board schematics below as well as the schematics for my sensor. Th...

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Is it safe to use +5 volts for I2C with this MPU?

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