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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the hex value for the control word that sets Port A as output?
💡 Hint: Refer to the control word format.
Question 2
Easy
What would you load into the accumulator to turn on all LEDs?
💡 Hint: Think of the binary representation of LEDs being ON.
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 primary purpose of the 8255 PPI?
- To perform arithmetic operations
- To interface with peripheral devices
- To store data
💡 Hint: Think about what type of connections the PPI facilitates.
Question 2
True or False: The control word for setting Port A as an input is 8AH.
- True
- False
💡 Hint: Consider what input configurations require.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Write an assembly program that modifies the blinking rate of the LEDs by altering the delay. Include detailed comments and explain your reasoning.
💡 Hint: Adjust the loops carefully and observe the changes in the blinking rate.
Question 2
Design a program using the 8255 to read inputs from four switches and display their states on LEDs with blinking patterns.
💡 Hint: Consider how you will repeatedly check the input state and represent it on the LED display.
Challenge and get performance evaluation