Atmel C51 Handbuch PDF herunterladen (Seite 20)

The 8051 Instruction Set

Atmel 8051 Microcontrollers Hardware Manual 1-18

4316E–8051–01/07

JB bit,rel Jump if direct Bit is set 3 24

JNB bit,rel Jump if direct Bit is Not set 3 24

JBC bit,rel Jump if direct Bit is set & clear bit 3 24

PROGRAM BRANCHING

ACALL addr11 Absolute Subroutine Call 2 24

LCALL addr16 Long Subroutine Call 3 24

RET Return from Subroutine 1 24

RETI Return from interrupt 1 24

AJMP addr11 Absolute Jump 2 24

LJMP addr16 Long Jump 3 24

SJMP rel Short Jump (relative addr) 2 24

JMP @A+DPTR Jump indirect relative to the DPTR 1 24

JZ rel Jump if Accumulator is Zero 2 24

JNZ rel Jump if Accumulator is Not Zero 2 24

CJNE A,direct,rel Compare direct byte to Acc and Jump

if Not Equal

3 24

CJNE A,#data,rel Compare immediate to Acc and Jump

if Not Equal

3 24

CJNE R

,#data,rel Compare immediate to register and

Jump if Not Equal

3 24

CJNE @R

,#data,rel Compare immediate to indirect and

Jump if Not Equal

3 24

DJNZ R

,rel Decrement register and Jump if Not

Zero

2 24

DJNZ direct,rel Decrement direct byte and Jump if

Not Zero

3 24

NOP No Operation 1 12

Mnemonic Description Byte Oscillator

Period

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 115 116

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Atmel C51 Handbuch Seite 20