5 volt tolerance

Hello,
Does M4 core is 5 volt tolerant on gpio pins?

I want to connect a HC-SR04 ultrasonic distance sensor. It is 3.3 volt tolerant on trigger pin but i don't know if I can simply connect the output pin to the board without damaging the board itself.

Thank you

 

Hi Flavio,
This link will take you to a tutorial for using HC-SR04 on a Raspberry PI that also has 3.3v pins.

http://www.modmypi.com/blog/hc-sr04-ultrasonic-range-sensor-on-the-raspberry-pi

Regards
John

 

Hello John,
this is the same trick I used on banana pi.
My disappointment is that an Arduino Uno shield could have 5 volt signals. I thought that there were logic-level translators on each M4 pin to accomplish that.

 

Dear Flavio,
there's no logic-level translator as you say.
In input you have to use a voltage divider. Take a look at this page.

 

Link doesn't work.

 

It is https://learn.sparkfun.com/tutorials/voltage-dividers/all?print=1

 

Thanks @vpeter!