Practice Part B: Timer Interfacing (8254) (3.2) - Interrupt Handling and Timer Interfacing (8085/8086 Microprocessors with 8253/8254 Timer)
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Part B: Timer Interfacing (8254)

Practice - Part B: Timer Interfacing (8254) - 3.2

Learning

Practice Questions

Test your understanding with targeted questions

Question 1 Easy

What does the 8254 timer primarily do?

💡 Hint: Think about timing in computers.

Question 2 Easy

Name one mode of operation for the 8254.

💡 Hint: What would you call a mode that creates a waveform?

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What is the main purpose of the 8254 timer?

To store data
To generate interrupts
To generate accurate time delays

💡 Hint: Consider what a timer does in general.

Question 2

True or False: The 8254 has three independent 8-bit counters.

True
False

💡 Hint: Pay attention to the bit width!

2 more questions available

Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

Design a system using the 8254 timer that switches an LED on and off at a frequency of 5 Hz. Calculate the initial clock count based on a given clock frequency of 1 MHz.

💡 Hint: Consider how the frequencies relate and the limitations of timer counts.

Challenge 2 Hard

Develop a suitable control word for configuring Counter 2 of the 8254 to operate in Mode 1 for a hardware retriggerable one-shot, ensuring it counts in binary.

💡 Hint: Remember how the bits are set corresponding to the mode!

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Reference links

Supplementary resources to enhance your learning experience.