5V-tolerant pins on STM32F429I-Disco1

[Dlinky]

Hey all, I have a I2C LCD display 2x16 that I'd like to connect to a F429I board. The display I2C signals are both 5V. I've seen that some pins of the F429I are 5V-tolerant but I'm having a hard time finding this info from the datasheet. In the case F429I I2C ports are ok with 5V signals, isn't that advisable to put a 330 to 470 ohms in series with SCL and SDA?

Thank you for your answer!

[Tesla DeLorean · Accepted solution]

The F429I data sheet should indicate FT on all the safe pins. Most typically are, watch the analogue pins.These aren't ATMEL 3.3V parts..

https://www.st.com/resource/en/datasheet/stm32f429ig.pdf

I wouldn't add series resistors.

I've moved to I2C OLED displays, and away from the clunky 162 LCDs

[Dlinky]

Thank you! I was looking at another datasheet. What do you mean by "These aren't ATMEL 3.3V parts"? Regarding the LCD display, I had it "on stock" and it is for a proof of concept design. I would be interested to know which OLED display(s) you are using...=)

[Tesla DeLorean]

Well unless I missed something all the 3.3V Arduino's using ATMEL ATSAMD devices are not 5V tolerant on any of their pins..