MICROPROCESSORS

JP instruction in 8085 performs branch if:
(i) Carry flag is 1
(ii) Parity flag is 1
(iii) Sign flag is 0
(iv) Auxiliary carry flag is 0

What can be the oscillator period for the multiplication operation of A and B in accordance to 16-bit product especially in B : A registers?
(i) 12
(ii) 24
(iii) 36
(iv) 48

The instruction to copy the content of a memory location using a register indirect addressing mode is?
(i) STAX
(ii) LDAX
(iii) LDA
(iv) None of the above

What can be the oscillator period for the multiplication operation of A and B in accordance to 16-bit product especially in B:A registers?
(i) 12
(ii) 24
(iii) 36
(iv) 48

Which among the single operand instructions complements the accumulator without affecting any of the flags?
(i) CLR
(ii) SETB
(iii) CPL
(iv) All of the above

What is the possible range of transfer control for 8-bit relative address especially in 2's complement form with respect to the first byte of preceding instruction?
(i) -115 to 132 bytes
(ii) -130 to 132 bytes
(iii) -128 to 127 bytes
(iv) -115 to 127 bytes

JNC stands for:
(i) Jump if no carry, jumps if CY=0
(ii) Jump if carry, jumps if CY=1
(iii) Jump if no carry, jumps if CY=1
(iv) Jump if carry, jumps if CY=0

Which of the following statement is true for the instruction PUSH B?
(i) It is an arithmetic instruction
(ii) Executes in single machine cycle
(iii) It reads from memory location
(iv) It performs memory write operation

Indexed addressing mode is mainly used for

(i) Arrays
(ii) Arithmetic
(iii) Stack
(iv) Logic

PUSH and POP instructions are used to ____ and ____ respectively.
(i) Send the data from the stack, copy the data to the stack
(ii) Send the data to the stack, copy the data from the stack
(iii) All of the above
(iv) None of the above

Which instruction decrements and jumps if not zero?

(i) DJNZ
(ii) AJMP
(iii) CJNE
(iv) NOP

The system program used to translate directly an assembly language to machine language is called:
(i) Compiler
(ii) Assembler
(iii) Text editor
(iv) Debugger

Write a program that converts odd parity bytes to even parity bytes (bit 7 is the parity bit).

Explain the indexed addressing and relative addressing in 8051 micro-controller.

Explain the various programming and debugging tools in 8051 micro-controller.

What are the different program development tools used in microprocessor and microcontrollers?

Show the results of the following:

(i)

MOV A, #35H
ANL A, 0FH

(ii)

MOV A, #04H
ORL A, 03H

(iii)

MOV A, #54H
XRL A, A

(iv)

CLR C
MOV A, #26H
RRC A

What are the different addressing modes used in microprocessor? Explain with suitable instruction examples.

What are the different instruction types supported in 8085 microprocessor? Explain with suitable instruction examples.

Discuss the data transfer and arithmetic instructions of the 8051.

Write a program to find the largest number in an array using 8051 assembly language.

What is Subroutine? Explain the execution of Subroutine function.

Explain Different Addressing Modes of 8051 Microcontroller.

Explain subroutine instructions and stack operations in 8051.

Explain in detail about the addressing modes of 8051. Use example instructions for proper explanation.

What are the branching instructions in 8051? Explain with suitable examples.

Explain the following instructions:
(i) CJNE
(ii) DJNZ

Define subroutine. Explain the execution of subroutine function.

Explain the register addressing mode and direct addressing mode in 8051.

Define "OPCODE" and "OPERAND" with example. What do you understand by instruction set. Write the 3 categories of data transfer instructions.

Explain the data transfer instructions and arithmetic instructions with few examples.

Write short notes on: Various addressing modes of 8051 microcontroller