DJNZ. Home » Instructions » DJNZ. The DJNZ instruction decrements the byte indicated by the first operand and, if the resulting value is not zero, branches to the address specified in the second operand..
Accordingly, what is CJNE?
CJNE. Home » Instructions » CJNE. The CJNE instruction compares the first two operands and branches to the specified destination if their values are not equal. If the values are the same, execution continues with the next instruction. See Also: DJNZ.
Additionally, what is the function of MOV r4 A? The MOV instruction moves data bytes between the two specified operands. The byte specified by the second operand is copied to the location specified by the first operand.
Also Know, what is the function of JNC?
JNC. The JNC instruction transfers program control to the specified address if the carry flag is 0. Otherwise, execution continues with the next instruction.
What is SJMP?
Home » Instructions » SJMP. The SJMP instruction transfers execution to the specified address. The address is calculated by adding the signed relative offset in the second byte of the instruction to the address of the following instruction.
Related Question Answers
What is Lcall?
LCALL (Long Call) LCALL is a 3-byte instruction where the first byte represents the opcode and the second and third bytes are used to provide the address of the target subroutine. LCALL can be used to call subroutines which are available within the 64K-byte address space of the 8051.What is DPTR in 8051?
The Data Pointer (DPTR) is the 8051's only user-accessible 16-bit (2-byte) register. The Accumulator, R0–R7 registers and B register are 1-byte value registers. DPTR is meant for pointing to data. It is used by the 8051 to access external memory using the address indicated by DPTR.What is ANL in 8051?
The ANL instruction performs a bitwise logical AND operation between the specified byte or bit operands and stores the result in the destination operand. Note. When this instruction is used to modify an output port, the value used as the port data will be read from the output data latch, not the input pins of the port. What is Movc?
Description: MOVC moves a byte from Code Memory into the Accumulator. The Code Memory address from which the byte will be moved is calculated by summing the value of the Accumulator with either DPTR or the Program Counter (PC).What is the significance of DJNZ instruction in this program?
DJNZ. The DJNZ instruction decrements the byte indicated by the first operand and, if the resulting value is not zero, branches to the address specified in the second operand.What is Movx instruction?
MOVX. Home » Instructions » MOVX. The MOVX instruction transfers data between the accumulator and external data memory. External memory may be addressed via 16-bits in the DPTR register or via 8-bits in the R0 or R1 registers.What is the meaning of the instruction MOV A 05h?
In this type, the operand is specified in the instruction along with the opcode. In simple way, it means data is provided in instruction itself. Ex: MOV A,#05H -> Where MOV stands for move, # represents immediate data. 05h is the data. It means the immediate date 05h provided in instruction is moved into A register.What is JNC in assembly language?
Home » Instructions » JNC. The JNC instruction transfers program control to the specified address if the carry flag is 0. Otherwise, execution continues with the next instruction. No flags are affected by this instruction.What is JC in microprocessor?
Microprocessor8085. In 8085 Instruction set, we are having one mnemonic JC a16, which stands for “Jump if Carry” and “a16” stands for any 16-bit address. This instruction is used to jump to the address a16 as provided in the instruction.What is INX microprocessor?
Microprocessor8085. In 8085 Instruction set, INX is a mnemonic that stands for “INcrementeXtended register” and rp stands for register pair. And it can be any one of the following register pairs. rp = BC, DE, or HL. This instruction will be used to add 1 to the present content of the rp.What is the use of CMP instruction?
CMP Instruction It is generally used in conditional execution. This instruction basically subtracts one operand from the other for comparing whether the operands are equal or not. It does not disturb the destination or source operands. It is used along with the conditional jump instruction for decision making.What is MOV instruction?
MOV instruction is a copy instruction. MOV copies the source operand to the destination operand without affecting the source.What is indexed addressing mode?
Indexed Addressing Indexed addressing mode is used to access elements in arrays which are stored in memory at consecutive locations. This addressing mode will allow the program to access a location by incrementing or decrementing the index value. The instructions would include an index register and an offset.What is meant by addressing modes?
Addressing modes are an aspect of the instruction set architecture in most central processing unit (CPU) designs. An addressing mode specifies how to calculate the effective memory address of an operand by using information held in registers and/or constants contained within a machine instruction or elsewhere.What is register addressing mode?
Register mode: In register addressing the operand is placed in one of 8 bit or 16 bit general purpose registers. The data is in the register that is specified by the instruction. Here one register reference is required to access the data. Example: MOV AX,CX (move the contents of CX register to AX register)What is opcode and operand?
Opcode is a part of the instruction that tells the processor what should be done. Operand is a part of the instruction that contains the data to be acted on, or the memory location of the data in a register.Which of the following is an 8 bit register?
Which of the following is an 8-bit register? Explanation: The registers, PSW, TCON and Accumulator are 8-bit registers. Explanation: The Data Pointer(DPTR) is used for accessing external data memory which means that it includes both DPH and DPL.What is instruction in microcontroller?
Instructions written in a program tell the Microcontroller which operation to carry out. An Instruction Set is unique to a family of computers. This tutorial introduces the 8051 Microcontroller Instruction Set also called as the MCS-51 Instruction Set. 
