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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does the 8255 PPI do?
💡 Hint: Think about what happens between the microprocessor and devices like keyboards or LEDs.
Question 2
Easy
Define the Control Word.
💡 Hint: Think about the word we use to set the direction of the I/O ports.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the main function of the 8255 PPI?
- To connect to serial devices.
- To interface microprocessors with external devices.
- To perform mathematical calculations.
💡 Hint: Consider what role it serves in connecting the microprocessor to devices like LEDs and switches.
Question 2
True or False: The Control Word can modify which ports are set to input or output.
- True
- False
💡 Hint: Think about how you would change the behavior of different ports.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Design a scenario where you need to configure an 8255 to read from four push-button switches and control four LEDs based on their states. Detail your approach to writing an assembly code.
💡 Hint: Think about how you will read the inputs and direct the outputs effectively.
Question 2
Assuming you have to use the 8255 PPI for a device requiring handshaking signals, outline how you would configure it.
💡 Hint: Consider how the Control Word’s bits will translate to setting the correct ports for handshaking.
Challenge and get performance evaluation