Diploma in ECE and EEE Study Material | Microcontroller Unit 4 | Yuvasallinfo

Diploma in ECE and EEE Study Material | Microcontroller Unit 4 | Yuvasallinfo

34052-MICROCONTROLLER

Unit-4 Syllabus

INTERRUPT AND SERIAL COMMUNICATION
4.1 SERIAL COMMUNICATION
Basics of Serial programming – RS 232 Standards – 8051 connection to RS 232 – 8051 Serial Communication Programming – Programming 8051 to transmit data serially – Programming 8051 to Receive data serially.
4.2 INTERRUPT
8051 Interrupt s – Programming Timer Interrupts – Programming external hardware interrupts – Programming the serial communication interrupt –Interrupt priority in 8051 (simple programs).

Microcontroller study material, Diploma  Study Material given Below:

 Important 2 Mark Questions

1. Define Full duplex transmission.
2. What are the register used in Serial Communication ?
3. What is the voltage levels used in RS 232 Serial interface standards?
4. Define baud rate.
5. What is the function of REN bit in SCON register?
6. Specify the different modes of Serial Communication.
7. List the interrupts available in 8051.
8. Write the functions of SMOD bit in PCON register.
9. What are the external hardware interrupts available in 8051?
10. What are the SFR register used in interrupt Operation.

 Important 3 Mark Questions

1. Write the features and limitations of RS 232.
2. Why are drivers used in between RS 232 and Microcontroller?
3. How will you double the baud rate in 8051?
4. Mention the baud rate of Serial Communication in mode 2 and mode 3.
5. What are the conditions required for initiating a Serial reception?
6. Write the importance of the TI Flag.
7. Write the two activation levels for external hardware interrupt.
8. Draw PCON register.
9. Specify the vector address and Priorities of Interrupts in 8051.
10. What are the functions of RXD and TXD Pins in 8051?

Unit -4 Important 10 Mark Questions

1. What is RS 232 ? Explain the interfacing of RS 232 with 8051.
2. Explain SCON and PCON registers.
3. Explain in detail about the Programming 8051 to transfer and receive data Serially.
4. Write an ALP for Sending a character placed in register ˝C˝ in mode 1,by using timer1 in mode 2 for baud rate.
5. Explain the baud rates of Serial Communication in 8051.
6. Draw and Explain the Interrupt Structure of 8051.
7. Explain the Programming of external hardware interrupts and Serial Communication interrupts.
8. Explain IP and IE registers.
9. Write an ALP for receiving 10D number of characters in Serial manner and store the characters from memory location 2100H. Set the timer 1 in auto- reload mode and Serial reception in mode 1.
10. Explain the Interrupts Priorities in 8051.

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