Siemens SAB 80515 Series User Manual page 159

DJNZ Rn,rel
Operation: DJNZ
(PC) ← (PC) + 2
(Rn) ← (Rn) – 1
if (Rn) > 0 or (Rn) < 0
then (PC) ← (PC) + rel
Encoding: 1 1 0 1
Bytes: 2
Cycles: 2
DJNZ direct,rel
Operation: DJNZ
(PC) ← (PC) + 2
(direct) ← (direct) – 1
if (direct) > 0 or (direct) < 0
then (PC) ← (PC) + rel
Encoding: 1 1 0 1
Bytes: 3
Cycles: 2
Semiconductor Group
1 r r r rel. address
0 1 0 1 direct address
159
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Instruction Set
rel. address