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Texas Instruments MSC1210 User Manual

Page 297

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8052 Instruction Set

E-13

8052 Instruction Set

JMP

Jump to Data Pointer + Accumulator

Syntax

JMP @A+DPTR

Instructions

OpCode

Bytes

Cycles

Flags

JMP @A+DPTR

0x73

1

2

None

JMP jumps unconditionally to the address represented by the sum of the value
of DPTR and the value of the accumulator.

See also: LJMP, AJMP, SJMP

JNB

Jump if Bit Not Set

Syntax

JNB bitAddr,reladdr

Instructions

OpCode

Bytes

Cycles

Flags

JNB bitAddr,relAddr

0x30

3

2

None

JNB branches to the address indicated by relAddr if the indicated bit is not set.
If the bit is set, program execution continues with the instruction following the
JNB instruction.

See also: JB, JBC

JNC

Jump if Carry Not Set

Syntax

JNC reladdr

Instructions

OpCode

Bytes

Cycles

Flags

JNC relAddr

0x50

2

2

None

JNC branches to the address indicated by relAddr if the carry bit is not set. If
the carry bit is set, program execution continues with the instruction following
the JNB instruction.

See also: JC