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8052 Instruction Set
E-7
8052 Instruction Set
CJNE Compare and Jump if Not Equal
Syntax CJNE operand1,operand2,reladdr
Instructions OpCode Bytes Cycles Flags
CJNE A,#data8,reladdr 0xB4 3 2 C
CJNE A,direct,reladdr 0xB5 3 2 C
CJNE @R0,#data8,reladdr 0xB6 3 2 C
CJNE @R1,#data8,reladdr 0xB7 3 2 C
CJNE R0,#data8,reladdr 0xB8 3 2 C
CJNE R1,#data8,reladdr 0xB9 3 2 C
CJNE R2,#data8,reladdr 0xBA 3 2 C
CJNE R3,#data8,reladdr 0xBB 3 2 C
CJNE R4,#data8,reladdr 0xBC 3 2 C
CJNE R5,#data8,reladdr 0xBD 3 2 C
CJNE R6,#data8,reladdr 0xBE 3 2 C
CJNE R7,#data8,reladdr 0xBF 3 2 C
CJNE compares the value of operand1 and operand2 and branches to the
indicated relative address if the two operands are not equal. If the two operands
are equal, program flow continues with the instruction following the CJNE
instruction.
The carry (C) bit is set if operand1 is less than operand2, otherwise it is cleared.
See also: DJNZ
CLR Clear Register
Syntax CLR register
Instructions OpCode Bytes Cycles Flags
CLR bitAddr 0xC2 2 1 None
CLR C 0xC3 1 1 C
CLR A 0xE4 1 1 None
CLR clears (sets to 0) the bit(s) of the indicated register. If the register is a bit
(including the carry bit), only the specified bit is affected. Clearing the accumu-
lator sets the accumulator value to 0.
See also: SETB