8.3.2. GPIO Pin Configuration

Try these first

1. 1.

   What does GPIO stand for?

   Hint

   Think about the full form of each word in the acronym.

2. 2.

   What mode would you use for a pin that reads a sensor's data?

   Hint

   Consider what type of action the pin is taking.

3. 3.

   What is the primary function of a GPIO pin set to output mode?

   • To read external signals
   • To send signals to external devices
   • To do nothing

   Hint

   Think about what output mode means.

4. 4.

   True or False: Pull-up resistors can only be used with input pins.

   • True
   • False

   Hint

   Recall the function of pull-up resistors.

5. 5.

   Design a simple embedded system using GPIO pins to control an LED based on a button press sensed by a GPIO input. Describe the setup and logic.

   Hint

   Draw a schematic diagram to help visualize your design.

6. 6.

   Explain how to handle noise in GPIO signals during input mode, and provide a method to prevent false triggering.

   Hint

   Consider electronic techniques to clean up signals.