8.3.1. GPIO Overview

Try these first

1. 1.

   What does GPIO stand for?

   Hint

   Think about the functions of these pins.

2. 2.

   What is the purpose of pull-up resistors?

   Hint

   Consider how you ensure a pin has a default state.

3. 3.

   What does GPIO stand for?

   • General Purpose Input/Output
   • General Purpose Input/Oracle
   • General Purpose Outputs

   Hint

   Focus on the main functions of these pins.

4. 4.

   True or False: GPIO pins can only be used as either input or output, not both.

   • True
   • False

   Hint

   Remember the flexibility of GPIO.

5. 5.

   Design a program using GPIO on a microcontroller where a button press should toggle an LED on and off. Explain how the code uses interrupts.

   Hint

   Consider how the microcontroller detects changes in pin state.

6. 6.

   Explain the concept of shared communication lines using GPIO and open-drain outputs in I2C. What are the benefits of this approach?

   Hint

   Think about how devices can listen to each other on the same bus without interference.