What is RLC in 8051 microcontroller?

Home » Instructions » RLC. The RLC instruction rotates the eight bits in the accumulator and the one bit in the carry flag left one bit position. Bit 7 of the accumulator is rotated into the carry flag while the original value of the carry flag is rotated into bit 0 of the accumulator.

What is RLC in microcontroller?

In 8085 Instruction set, there is one mnemonic RLC stands for “Rotate Left Accumulator”. It rotates the Accumulator contents to the left by 1-bit position. Notice that Cy flag is not involved in the rotation, and it is only 8-bit rotation of Accumulator contents. Only Cy flag is affected by this instruction execution.

Which of the following instruction is used for multiplying two unsigned bytes in register A and B?

The MUL instruction multiplies the unsigned 8-bit integer in the accumulator and the unsigned 8-bit integer in the B register producing a 16-bit product. The low-order byte of the product is returned in the accumulator.

What are the type of instructions in a 8051 microcontroller?

They are:

• Data Transfer Instructions.
• Arithmetic Instructions.
• Logical Instructions.
• Boolean or Bit Manipulation Instructions.
• Program Branching Instructions.

What is the minimum number of instructions we need to do multiplication in 8051 microcontroller?

Now we will try to multiply two 8-bit numbers using this 8051 microcontroller. The register A and B will be used for multiplication. No other registers can be used for multiplication. The result of the multiplication may exceed the 8-bit size….8051 Program to Multiply two 8 Bit numbers.

Address	Value
	. . .
30H	00H
31H	00H
	. . .

Which of the following instruction will add the accumulator and register 3?

28. Which of the following statements will add the accumulator and register 3? 29. Data transfer from I/O to external data memory can only be done with the MOV command….Exercise :: The 8051 Microcontroller – General Questions.

A.	MOV A, P27
C.	MOV A, 27H
D.	MOV A, @27

What is RAL instruction?

In 8085 Instruction set, there is another mnemonic RAL,which stands or Rotate Accumulator Left and also involving Cy flag in rotation. It rotates the Accumulator contents to the left by 1-bit position. The instruction can be used for multiple purposes.

How is multiplication used in 8051 microcontroller?

Now we will try to multiply two 8-bit numbers using this 8051 microcontroller. The register A and B will be used for multiplication. No other registers can be used for multiplication. The result of the multiplication may exceed the 8-bit size….8051 Program to Multiply two 8 Bit numbers.

Address	Value
20H	FFH
21H	FFH
	. . .
30H	00H

Which of the following multiplication instruction is appropriate in 8051?

List of Arithmetic instructions of 8051

Operation	Opcode	Description
Decrement	DEC	[Data at Address pointed by register]<-[Data at Address pointed by register-1]
Multiplication	MUL	[A]<-[A]*[B]
Division	DIV	[A]<-[A]/[B]
Decimal adjust	DA	Coverts binary addition to BCD

Which of the following statement is true 8051 microcontroller?

Right Answer is: D The stack pointer is an 8-bit register, the direct address of SP is 81H and it is only byte-addressable, which means you cannot access individual bits of the stack pointer. The content of the stack pointer points to the last stored location of the system stack.