Exam Details
| Subject | Micro Controller | |
| Paper | ||
| Exam / Course | Diploma In Electronics And Communication Engineering (DECVI)/ Advanced Level Certificate Course In Electronics And Communication Engineering (ACEVI)/ | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | December, 2015 | |
| City, State | new delhi, |
Question Paper
1. Choose the correct answer from the given four alternatives.
The internal RAM memory of the 8051 is
32 bytes
64 bytes
128 bytes
256 bytes
The technique of assigning a memory address to each I/O device in the computer system is called
peripheral mapped I/O
memory mapped I/O
ported I/O
dedicated I/O
STACK in 8085 works in
FIFO
LIFO
FILO
LILO
Which one of the following has the highest priority among all the interrupts in 8086
NMI
DIV 0
TYPE 255
OVERFLOW
The 8051 microcontroller can handle interrupt sources.
3
4
5
6
With respect to MOVC bit instruction, MOV bit, C instruction in 8051 takes
one cycle less
same cycles
one cycle more
None of these
Which of the following signals is used to generate the read strobe for external program memory, interfaced with 8051 IC?
RD
PSEN
EA
None of these
What is the relation between Instruction cycle, Machine cycle, State and Pulse for any XX51 or 8051 microcontroller?
What are the major differences between 8051 ports and 8255 ports How are 8051 ports configured to function as input or output?
What is meant by 'Addressing Mode' How many addressing modes are there in 8051 Give one example of each type.
Two unpacked BCD digits are available in locations 30H(MS digit) and 31H (LS digit). Write a program to pack these two and store in R7.
In mode 1 of 8255 what are the control signals when ports A and B act as output ports Discuss the control signals. Draw the timing waveform for such strobed output.
Find the data direction and modes of operation of the 8255 ports, if the control word written into it is AOH.
What are the essential features of 8155 Discuss the timer section of 8155 and its operating modes.
What do you understand by assembler directives Explain the following directives with examples:
DB, ORG, EQU, END.
How many types of serial communication are possible using 8051 What is the difference between mode 1 and mode 3 of serial communications
Compare the two architectures, Harvard and Von Neumann, of microcontroller/microprocessor.
Interface a set of 8 switches and 8 LEDs with the 8085 using an 8255 PPI chip. The 8255 should be selected for the following memory addresses:
Port A -0740H,
Port B -0742H,
Port C -0744H and CWR 0746H
Write a program to indicate the status of the switches on LEDs.
Differentiate between the following Data Transfer Techniques:
Synchronous and Asynchronous
Polling and Interrupt driven
8. Write short notes on any two of the following:
Architecture of 8051
Boolean Processor
PSW SFR of 8051
Interrupts of 8051
The internal RAM memory of the 8051 is
32 bytes
64 bytes
128 bytes
256 bytes
The technique of assigning a memory address to each I/O device in the computer system is called
peripheral mapped I/O
memory mapped I/O
ported I/O
dedicated I/O
STACK in 8085 works in
FIFO
LIFO
FILO
LILO
Which one of the following has the highest priority among all the interrupts in 8086
NMI
DIV 0
TYPE 255
OVERFLOW
The 8051 microcontroller can handle interrupt sources.
3
4
5
6
With respect to MOVC bit instruction, MOV bit, C instruction in 8051 takes
one cycle less
same cycles
one cycle more
None of these
Which of the following signals is used to generate the read strobe for external program memory, interfaced with 8051 IC?
RD
PSEN
EA
None of these
What is the relation between Instruction cycle, Machine cycle, State and Pulse for any XX51 or 8051 microcontroller?
What are the major differences between 8051 ports and 8255 ports How are 8051 ports configured to function as input or output?
What is meant by 'Addressing Mode' How many addressing modes are there in 8051 Give one example of each type.
Two unpacked BCD digits are available in locations 30H(MS digit) and 31H (LS digit). Write a program to pack these two and store in R7.
In mode 1 of 8255 what are the control signals when ports A and B act as output ports Discuss the control signals. Draw the timing waveform for such strobed output.
Find the data direction and modes of operation of the 8255 ports, if the control word written into it is AOH.
What are the essential features of 8155 Discuss the timer section of 8155 and its operating modes.
What do you understand by assembler directives Explain the following directives with examples:
DB, ORG, EQU, END.
How many types of serial communication are possible using 8051 What is the difference between mode 1 and mode 3 of serial communications
Compare the two architectures, Harvard and Von Neumann, of microcontroller/microprocessor.
Interface a set of 8 switches and 8 LEDs with the 8085 using an 8255 PPI chip. The 8255 should be selected for the following memory addresses:
Port A -0740H,
Port B -0742H,
Port C -0744H and CWR 0746H
Write a program to indicate the status of the switches on LEDs.
Differentiate between the following Data Transfer Techniques:
Synchronous and Asynchronous
Polling and Interrupt driven
8. Write short notes on any two of the following:
Architecture of 8051
Boolean Processor
PSW SFR of 8051
Interrupts of 8051
Other Question Papers
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- Advance Microprocessor And Architecture
- Analog And Mixed Mode Vlsi Design
- Analog Communication
- Analog Electronic Circuits
- Analog Integrated Circuits Design
- Antennas And Propagation
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- Basic Telematics
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