GPIO Pins(Nucleo-H753zi)

[Kishen31]

Hello,

I’m working on a project with the NUCLEO-H753ZI board and need to connect multiple devices. I’d like to know:

1. How many GPIO pins are 5 V-tolerant for digital input?
2. How many GPIO pins are available for general use, both 3.3 V-only and 5 V-tolerant, considering the board’s default peripherals?

I want to make sure I safely use the MCU’s GPIOs for my inputs and outputs. Any guidance or reference resources would be appreciated.

Thank You!

[mfgkw]

In DS12117 taken from https://www.st.com/resource/en/datasheet/stm32h753zi.pdf you find a table 8 "Pin/ball definition" (starting on page 64). Pins marked as "FT" are 5V tolerant as given in table 7.

HTH Klaus

[TDK]

See also the schematic for the board. Most pins are 5V tolerant.

https://www.st.com/resource/en/schematic_pack/mb1364-h753zi-e01-schematic.pdf

I suggest approaching this the other way--decide how many 5V tolerant pins you need then find a board that supports that. If you need 40-50 or less, you should have no problem.