Intel MCS48 User Manual page 88

8021
INSTRUCTION SET
SUMMARY
Mnemonic
Description Bytes Cycle
ADD
A,R Add
register to
A
1
ADD
A,@R Add
data
memory
to
A
1
ADD
A,#data
Add
immediate
to
A
2
2
ADDC
A,R Add
with carry
1
ADDC
A,@R
Add
with
carry
1
ADDC
A,#data
Add
with
carry 2 2
ANL
A,R
And
register to
A
1
ANL
A,@R
And
data
memory
to
A
1
ANL
A,#data
And
immediate
to
A
2 2
ORL
A,R
Or
register to
A
1
ORL
A,@R Or
data
memory
to
A
1
ORL
A,#data Or immediate
to
A
2 2
XRL
A,R
Exclusive
Or
register
to
A
1
XRL A,@R
Exclusive or data
memory
to
A
1
XRL
A,#data
Exclusive or
immediate
to
A
2 2
INC
A
Increment
A
1
DEC A
Decrement
A
1
CLR
A
Clear
A
1
CPL A
Complement
A
1
DA
A
Decimal Adjust
A
1
SWAP A
Swap
nibbles of
A
1
RL
A
Rotate
A
left
1
RLC A
Rotate
A
left
through carry
1
RR
A
Rotate
A
right
1
RRC
A
Rotate
A
right
through
carry
1
IN A,P Input port
to
A
1
2
OUTL
P,A
Output
A
to
port
1
2
MOVD
A,P
Input
Expander
port
to
A
1
2
MOVD
P,A Output
A
to
Expander
port
1
2
ANLD
P.A
And
A
to
Expander
port
1
2
ORLD
P,A Or
A
to
Expander
port
1
2
INC R
Increment
register
1 1
INC
@R
Increment data
memory
1 1
Mnemonic
Description Bytes Cycle
JMP
addr
Jump
unconditional 2 2
JMPP
@A
Jump
indirect
1
2
DJNZ
R.addr
Decrement
register
and
Jump
2
2
on
R
not zero
JC addr
Jump
on Carry
=1
2
2
JNC
addr
Jump
on Carry =
2 2
JZ addr
Jump
on
A
Zero 2 2
JNZ
addr
Jump
on
A
not Zero 2 2
JT1 addr
Jump
on T1
=
1
2 2
JNT1
addr
Jump
on T1
=
2 2
JTF
addr
Jump
on timer
flag
2 2
CALL
addr
RET
Jump
to
subroutine
Return
No
Operation
Instruction Set
—
The
following instructions,
which
are
found
in
the 8748,
have been
deleted
from
the 8021
instruction
set.
Data
Moves
Registers
Branch
Timer Control Input/Output
MOV
A.PSW
MOV
PSW.A
MOVX
A.@R
DEC
R JTO
JNTO
JFO
JF1
JNI
JBb
addr
addr
addr
addr
addr
addr
EN TCNTI
DIS
TCNTI
EN
I
DIS
1
SEL RBO
SEL RBI
SEL
MBO
SEL
MB1
ENTO CLK
ANL
P,#data
ORL
P,#data
INS
A.BUS*
Flags
Subroutine
CLR
F0
CPL
F0
CLR
F1
CPL
F1
MOVP3 A,@A
RETR
ANL
BUS,#data
ORL
BUS,#data
"These
Instructions
have been replaced
in
the
8021 by
IN
A,PO and
OUTL
PO,A
respectively.
CLR
C
Clear
Carry
1 1
CPL
C
Complement
Carry
1
1
MOV
A,R Move
register to
A
1 1
MOV
A,@R
Move
data
memory
to
A
1
1
MOV
A,#data
Move
immediate
to
A
2
2
MOV
R,A Move
A
to register
1 1
MOV
@R,A
Move A
to data
memory
1 1
MOV
R,#data
Move
immediate
to register 2
2
MOV
@R,#data Move immediate
to
data
memory
2 2
XCH
A,R Exchange
A
and
register
1 1
XCH
A,@R
Exchange
A
and
data
memory
1
2
XCHD
A,@R
Exchange
nibble of
A
and
register
1 1
MOVP
A,@A Move
to
A
from
current
page
1
2
MOV
A,T
Read Timer/Counter
1 1
MOV
T,A Load Timer/Counter
1
1
STRT
T
Start
Timer
1 1
STRT CNT
Start
Counter
1 1
STOP TCNT
Stop Timer/Counter
1
1
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