Microcontroller Architecture and Programming : Electronics 1 : SYBCS : PYQ's

 Chapter 1 : Basic of Microcontroller and 8051 Architecture

April 2015

1. What are alternate functions of port 0 and port 2 ?

2. What are the mathematical registers in 8051?

3. What is the default value of SP after 8051 is reset?

4. Draw the internal structures of port pin and explain how read and write operation is carried out.

5. Draw bit format of PSW register and explain the function AC and OV bit.

6. Explain with neat diagram how a 4k x 8 program ROM can be connected to 8051.

April 2016

1. What is the size of address and data bus of 8051?

2. What is the function of ALE pin?

3. Which port of 8051 requires external pull up  registers?

4. What is the dual role of port 0?

5. Draw simplified block diagram of 8051 microncontroller and explain the function of any three components of it.

6. Differentiate between microprocessor and micro controller.

7. Explain function of program counter and data pointer.

April 2017

1. What is the value of program counter after power on reset?

2. What is the size of on-chip RAM of 8051?

3. Differentiate between microprocessor and microcontroller.

4. Explain RAM space allocation in 8051.

April 2018

1. Write the function of pin PSEN.

2. Which port of 8051 requires external pull up registers?

3. What is the value of stack pointer after power on reset in 8051?

4. Draw the block diagram of 8051 microcontroller architecture and explain any three blocks of it.

5. Write any five differences between microprocessor and microcontroller.

April 2019

1. What is meant by microcontroller?

2. What is capacity of internal ROM of 8051?

3. Explain the internal ram organization of 8051 microcontroller.

4. Explain the function of following pins of 8051 microcontroller

- RESET 

- ALER

- PSEN

-EA

-XTAL 1 nd XTAL 2