Practice Program 2: Blinking Leds On Port A (5.2) - Parallel I/O Interfacing with 8085 (8255 Programmable Peripheral Interface)
Students

Academic Programs

AI-powered learning for grades 8-12, aligned with major curricula

Engineering Courses
Professional

Professional Courses

Industry-relevant training in Business, Technology, and Design

Certifications
Games

Interactive Games

Fun games to boost memory, math, typing, and English skills

Program 2: Blinking LEDs on Port A

Practice - Program 2: Blinking LEDs on Port A

Learning

Practice Questions

Test your understanding with targeted questions

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.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

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.

2 more questions available

Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

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.

Challenge 2 Hard

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.

Get performance evaluation

Reference links

Supplementary resources to enhance your learning experience.