Digital Input/Output Pins

The following chapters introduce digital input/output, which are basic functions of microcontrollers. Input/output pins are microcontroller contacts. They are so called “legs”. A digital signal is received and transmitted through them. If a pin is configured as input, the status of switches or simple sensors connected to the pin can be received. When a pin is configured as output, it can be used to light LEDs or control electrical equipment.

Almost all typical microcontroller pins allow execution of easier input-output functions, although often these pins have alternative functions. Before addressing the alternative functions, which are covered in separate chapters, it would be useful to get to know the pins by studying their basic functions.