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7 years, 11 months ago.

is the i/o pins 3.3v or 5v for this?

https://developer.mbed.org/platforms/ST-Nucleo-F042K6/

how do I know?

Question relating to:

Last updated: 13 Oct 2022
Affordable and flexible platform to ease prototyping using a STM32F042K6T6 microcontroller.

1 Answer

Wim Huiskamp
7 years, 11 months ago.

All ST devices will output 3v3, most pins are 5V tolerant as input pins, but not all. Check the device manual for details.