DP805x Instructions set details
2.2.5. PROGRAM BRANCHES
- 10 -
Mnemonic
ACALL addr11
LCALL addr16
RET
Description
Absolute subroutine call
Long subroutine call
Return from subroutine
Code
0x11-0xF1
03
22
32
01-E1
02
80
73
60
70
40
50
20
30
10
B5
B4
B8-BF
B6-B7
D8-DF
D5
Bytes Cycles
2
3
1
1
2
3
2
1
2
2
2
2
3
3
3
3
3
3
3
2
3
1
4
4
4
4
3
4
3
5
4
4
3
3
5
5
5
5
4
4
5
4
5
1
RETI
Return from interrupt
AJMP addr11
LJMP addr16
SJMP rel
JMP @A+DPTR
JZ rel
JNZ rel
JC rel
JNC
JB bit,rel
Absolute jump
Long jump
Short jump (relative address)
Jump indirect relative to the DPTR
Jump if accumulator is zero
Jump if accumulator is not zero
Jump if carry flag is set
Jump if carry flag is not set
Jump if direct bit is set
JNB bit,rel
Jump if direct bit is not set
Jump if direct bit is set and clear bit
Compare direct byte to A and jump if not equal
Compare immediate to A and jump if not equal
Compare immediate to reg. and jump if not equal
JBC bit,direct rel
CJNE A,direct rel
CJNE A,#data rel
CJNE Rn,#data rel
CJNE @Ri,#data rel Compare immediate to ind. and jump if not equal
DJNZ Rn,rel
DJNZ direct,rel
NOP
Decrement register and jump if not zero
Decrement direct byte and jump if not zero
No operation
00
Table 7. Program branches
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