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Description: CJNE compares the value of operand1 and operand2 and branches to the indicated relative address if operand1 and operand2 are not equal. If the two operands are equal program flow continues with the instruction following the CJNE instruction.
8051 Instruction Set Manual CJNE. The CJNE instruction compares the first two operands and branches to the specified destination if their values are not equal. If the values Operation, CJNE PC = PC + 3 IF (Rn) <> immedate PC = PC + offset IF (Rn) < immediate C = 1 ELSE C = 0. Example, CJNE @R1, #24H, LABEL
CJNE. X. SETB C. 1. The Instruction Set and Addressing Modes. Rn. Register R7-R0 of the currently selected Register Bank. direct. 8-bit internal data location's address. This could be an Internal Data RAM location (0-127) or a SFR [i.e., I/O port, control register, status register, etc. (128-255)]. @Ri. 8-bit internal data RAM
Feb 29, 2016 Example, CJNE A, 60h, LABEL. Bytes: Number of bytes required to encode the instruction. Cycles: Number of instruction cycles required to execute the instruction. Note that there are 12 oscillator cycles to one instruction cycle on a standard 8051. Encoding: Lists the byte encoding for the instruction.
If the values are the same, execution continues with the next instruction. See Also: DJNZ CJNE @Rn, #immediate, offset C AC F0 RS1 RS0 OV P Bytes 3 Cycles 2 Encoding 1011011n immediate offset Operation CJNE PC = PC + 3 IF (Rn) <> immedate PC = PC + offset IF (Rn) < immediate C = 1 ELSE C = 0 Example CJNE
If there is more than one operand in an instruction, they are separated by a comma. For example: RET - return from a subroutine;; JZ TEMP - if the number in the accumulator is not 0, jump to the address marked as TEMP;; ADD A,R3 - add R3 and accumulator;; CJNE A,#20,LOOP - compare accumulator with 20. If they are
Alphabetical List of Instructions. ACALL - Absolute Call; ADD, ADDC - Add Accumulator (With Carry); AJMP - Absolute Jump; ANL - Bitwise AND; CJNE - Compare and Jump if Not Equal; CLR - Clear Register; CPL - Complement Register; DA - Decimal Adjust; DEC - Decrement Register; DIV - Divide Accumulator by B
8051 Assembly Programming. 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.
The 8051 has an instruction for the compare operation. It has the following syntax. In the 8051, the actions of comparing and jumping are combined into a single instruction called CJNE (compare and jump if not equal). The CJNE instruction compares two operands, and jumps if they are not equal.
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