I'm a new electronics hobbyist learning the basics. I'm controlling a 5v MCP42100 digital potentiometer from a Teensy 4.1 via SPI.
My Teensy 4.1 is 3.3v and not 5v tolerant. I have to run the MCP42100 at 5v.
What do I need to worry about if the SPI connection is write-only, using just CS, MOSI and SCK?
In what cases is not being 5v tolerant a problem?
5v connected to a pin in input mode is the main example I read about.
What about 5v connected to an output pin set low?
anything else?
Thank you for any insight you can give me.
My Teensy 4.1 is 3.3v and not 5v tolerant. I have to run the MCP42100 at 5v.
What do I need to worry about if the SPI connection is write-only, using just CS, MOSI and SCK?
In what cases is not being 5v tolerant a problem?
5v connected to a pin in input mode is the main example I read about.
What about 5v connected to an output pin set low?
anything else?
Thank you for any insight you can give me.