Diploma in ECE and EEE Study Material | Microcontroller Unit 5 | Yuvasallinfo

Diploma in ECE and EEE Study Material | Microcontroller Unit 5 | Yuvasallinfo

34052-MICROCONTROLLER

Microcontroller study material, Diploma  Study Material given Below:

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Unit-5 Syllabus

INTERFACING TECHNIQUES

5.1. IC 8255
IC 8255 – Block Diagram – Modes of 8255.

5.2. INTERFACING TECHNIQUES
Interfacing external memory to 8051– 8051 interfacing with the 8255 – ASM Programming – Relays – Sensor interfacing – ADC interfacing – DAC interfacing – Keyboard interfacing – Seven segment LED Display Interfacing – Stepper Motor interfacing – DC motor interfacing using PWM

 Important 2 Mark Questions

1. Define peripherals.
2. What is interfacing?
3. Mention the ports placed in 8255.
4. State the modes of operation of 8255.
5. What is relay?
6. Mention the 3 important components of electromagnetic relay.
7. Define ADC.
8. Define DAC.
9. Mention the different types of seven segment LEDs.
10. What is the use of Stepper motor?

 Important 3 Mark Questions

1. What is the use of 8255?
2. Mention the ports placed in group A and group B of 8255.
3. How is the I/O modes of 8255 classified.
4. Define opto isolator.
5. Define transducers.
6. Define ASM.
7. Which technique is used in ADC 0808?
8. State the output current of DAC 0808.
9. Mention the three major tasks of keyboard to get a meaningful data.
10. Which technique is used for varying the speed of DC motors used in microcontrollers?

Unit -5 Important 10 Mark Questions

1. With the diagram explain how 8051 is interfaced to external memory?
2. Draw the functional diagram of 8255 and explain each block.
3. Draw the interfacing diagram of LM35 with microcontroller and explain its operation.
4. Explain the various modes of operation of 8255.
5. With the diagram explain how is 8255 interfaced with 8051
6. Draw the interfacing diagram of DAC 0808 with 8051 and explain its operation.
7. Draw the interfacing diagram of matrix keyboard with microcontroller 8051 and explain its operation.
8. Draw the interfacing diagram of stepper motor with 8051 and explain its operation.
9. Draw the interfacing diagram of 4 digit seven segment LED display with microcontroller 8051 and explain its operation.
10. Draw the interfacing diagram of DC motor with microcontroller 8051 and explain its operation.

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