Intel MCS 51 - Page 64

i~. M=@-51 PROGRAMMER’SGUIDE AND INSTRUCTION SET
ANL dire@ #dats
Bytes: 3
Cycles: 2
Encoding:
0101 0011 directaddress immediatedata
Operation:
ANL
(direct)+ (direct) A #data
ANL C,<src-bit>
Function:
Description:
ANL C,bit
Bytes:
Cycles:
Encoding:
Operation:
ANL C,/bit
Bytes:
Cycles:
Encoding:
Operation:
Logioal-ANDfor bit variables
If theBooleanvalueofthe sourcebit isa logicalOthen clear the carryflag;otherwiseleavethe
carry flagin its current stste. A slash(“/”) precedingthe operandin the assemblylanguage
indicatesthat the logicalcomplementofthe addressedbit is usedas the sourcevaluq
but the
source bit itself &not affwed. No
otherflsgs are affected.
Onlydirect addressingis allowedfor the source-d.
Setthe carry flagif, and onlyif, P1.O= 1,ACC. 7 = 1,and OV = O:
MOV C,P1.O
ANL ~ACC.7
ANL C,/OV
2
2
;LOADCARRYWITH INPUT PIN STATE
;AND CARRY WITH ACCUM. BIT 7
;AND WITH INVERSEOF OVERFLOWFLAG
1000
100101 H
ANL
(C) ~ (C)
A (bit)
2
.
1o11 0000
=
ANL
(C) + (C)A 1
(bit)
2-34