Practice Programmable Peripheral Interface (8255 Ppi) (4.3.1) - Interfacing with Essential Peripherals
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Programmable Peripheral Interface (8255 PPI)

Practice - Programmable Peripheral Interface (8255 PPI)

Learning

Practice Questions

Test your understanding with targeted questions

Question 1 Easy

What are the three ports available in the 8255 PPI?

💡 Hint: Think about the letters in the name.

Question 2 Easy

What does the Control Word Register configure?

💡 Hint: Consider what needs setup before using the ports.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What is the primary function of the 8255 PPI?

Data processing
Peripheral interfacing
Signal amplification

💡 Hint: Think about what connects various devices to the CPU.

Question 2

Mode 2 in the 8255 allows for which operation?

True
False

💡 Hint: Consider whether two-way communication might be feasible.

1 more question available

Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

Using the 8255 PPI, design a circuit that connects a keyboard and an LED display. How would you configure the ports?

💡 Hint: Think about which ports are best suited for input vs output.

Challenge 2 Hard

Write assembly code to toggle Port C's lower nibble every second. How might you use the 8255 PPI in this setup?

💡 Hint: Consider what instructions will help manage timing for toggling.

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Reference links

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