I would like to connect a digital pin from a chip called CS5463
**broken link removed**
to my MCU.
The MCU input pin is defined as tristate.
My question is how can i be sure that the digital pin of the CS5463 will be able to change from '1' logic to '0' logic, meaning that it would be "strong" enough to change logic states?
But the two mentioned pins that i want to connect together, the CS5463 digital output pin and the MCU digital input pin are not SPI peripherals.
So is it stll ok?
But the two mentioned pins that i want to connect together, the CS5463 digital output pin and the MCU digital input pin are not SPI peripherals.
So is it still ok?
As Bill says, as long as they're similar voltage it will probably be fine. Don't connect a 5V output to a 3.3V input pin though, unless the datasheet says it is 5V tolerant.
You can connect 3.3V outputs to 5V chip inputs though. I do it routinely. In a recent project I have my 3.3V ARM7 board outputting a servo pulse-train that I connect to an input pin on a 5V PIC 12F683. Works just fine.