Microprocessor Lab Internal Viva Questions.-2016

1.     Define Microprocessor

2.     Explain the 2-key and N-Key rollover feature of keyboard design

3.     Draw the control word of 8255:BSR AND I/O Mode

4.     What is stack.What is the use of stack in subroutine.

5.     Define Microcontrollers

6.     Define Machine cycle,Instruction cycle and T-state

7.     Define Memory mapped I/O and peripheral mapped I/O

8.     Define DMA.

9.     Difference between Microprocessor and Microcontrollers

10.  Define Addressing Mode. Write the Addressing Modes of 8085/8051

11.  write the format of status register and mode set register in 8257

12.  .List the various registers in 8085/8051?

13.  .what are SIM and RIM instructions in 8085MP

14.  .What is keybounce?Explain different key bouncing techniques

15.  .Define PIC.How an interrupt can be handled using PIC

16.  Define Flag.Draw flag register of 8085/8051

17.  Show the formats of modeword, command word and status word of 8251

18.  List out the mode in keyboard and display controller 8279 interface

     19.  List and explain various modes of 8254 interval timer

     20 Define Interrupts.How interrupts are handled in 8085/8051

      21 Classify the interrupts of 8085/8051

     22.Define Addressing Mode. Write the Addressing Modes of 8085/8086/8051

23    what are SIM and RIM instructions in 8085MP

Cycle:3 Microcontroller Programs

1.   Addition of 8 bit numbers using 8051

Program:

ORG 0X00
MOV A,#03H
MOV R0,#02H
ADD A,R0
END
                                       2.SUBTRACTION:
ORG 0X00
MOV A,#05H
MOV B,#03H
SUBB  A,R0
END
                                            3.MULTIPLICATION

ORG 0X00
MOV A,#04H
MOV B,#02H
MUL AB
END

                                            4.DIVISION:
org 0x00
mov A,#12
mov B,#03
div AB
end

                                       5.FACTORIAL
ORG 0X00
MOV A,#01H
MOV R1,#05H
L1:MOV B,R1
MUL AB
DJNZ R1,L1
END

                                 6.PACKED AND UNPACKED
ORG 0X00
MOV A, 50H
ANL A, #0FH
MOV 52H,A
MOV A, 50H
RL A
RL A
RL A
RL A
ANL A,#0FH
MOV 53H,A
END

                                       7.PERFORM RL/RR/RLC/RRC
i)RR:
ORG 0X00
MOV A,#02H
RR A
END
Input :
OUTPUT:

ii)RL:
ORG 0X00
MOV A,03H
RL A
END
Input :
OUTPUT:

iii)RLC:
ORG 0X00
MOV A,#04H
RLC  A
END
Input :
OUTPUT:

iv)RRC:
org 0x00
mov a,#04h
rrc a
end
Input :
OUTPUT:

INTERFACING ADC USING 8085.

INTERFACING ADC USING 8085.

PROGRAM:

ADDRESS	OPCODE	LABEL	MNEMONICS	OPERAND	COMMENT
8800
8801
8802
8803
8804
8805			MVI A,	92H	PORT A,B-I/P PORT C-O/P
8806
8807			OUT	43H
8808
8809			MVI A,	03H
880A
880B			OUT	42H	PORT ADD OF C
880C
880D			JMP	SETTLEMENT( TIME
880E
880F
8810		BACK	MVI A,	02
8811
8812			OUT	43H	TO CONTROL REGISTER
8813
8814			INR	A
8815			OUT	43H
8816
8817			MVI A,	00
8818
8819			OUT	43H
881A
881B			NOP
881C			NOP
881D			NOP
881E			INR	A
881F			OUT	43H
8820
8821			IN	40
8822
8823			STA	9001
8834
8825
8826			IN	41H
8827

  

ADDRESS	OPCODE	LABEL	MNEMONICS	OPERAND	COMMENT
8828			STA	9002
8829
882A
882B			RST	5
		SETTLEMENT	TIME
88B7			MVI  C,	20H
88B8
88B9		L1	DCR	C
88BA			JNZ	L1
88BB
88BC
88BD			NOP
88BE			JMP	BACK
88BF
88C0

OBSERVATION: