📄 keilc51ic.mht
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<TD style=3D"FONT-SIZE: 12pt; PADDING-TOP: 10px" =
align=3Dmiddle=20
width=3D"99%" height=3D40><B><FONT color=3D#990000>Keil =
C51=20
=
=D7=DC=CF=DF=CD=E2=C9=E8=B2=D9=D7=F7=CE=CA=CC=E2=B5=C4=C9=EE=C8=EB=B7=D6=CE=
=F6 </FONT></B></TD></TR>
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align=3Dmiddle=20
=
height=3D30>=C0=B4=D4=B4=A3=BA=B5=A5=C6=AC=BB=FA=D0=C5=CF=A2=CD=F8 =
=D7=F7=D5=DF=A3=BA =B7=A2=B2=BC=CA=B1=BC=E4=A3=BA2007-12-13 =
=D4=C4=B6=C1=B4=CE=CA=FD:
<SCRIPT language=3Djavascript=20
=
src=3D"http://www.infomcu.com/plus/count.php?aid=3D1001&mid=3D0&v=
iew=3Dyes"></SCRIPT>
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=D0=A1=A1=BF=A1=BE=CA=D5=B2=D8=B1=BE=CE=C4=A1=BF =A1=BE<A =
onclick=3Dwindow.print();=20
=
href=3D"http://www.infomcu.com/TechArticle/20071213/1001.html#">=B4=F2=D3=
=A1</A>=A1=BF=20
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<TD width=3D748>
<TABLE width=3D"100%">
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<H3>Keil C51=20
=
=D7=DC=CF=DF=CD=E2=C9=E8=B2=D9=D7=F7=CE=CA=CC=E2=B5=C4=C9=EE=C8=EB=B7=D6=CE=
=F6</H3><BR>=D4=C4=B6=C1=C1=CB=A1=B6=B5=A5=C6=AC=BB=FA=D3=EB=C7=B6=C8=EB=CA=
=BD=CF=B5=CD=B3=D3=A6=D3=C3=A1=B72005=C4=EA=B5=DA10=C6=DA=D4=D3=D6=BE=A1=B6=
=BE=AD=D1=E9=BD=BB=C1=F7=A1=B7=C0=B8=C4=BF=B5=C4=D2=BB=C6=AA=CE=C4=D5=C2=A1=
=B6Keil=20
=
C5l=B6=D4=CD=AC=D2=BB=B6=CB=BF=DA=B5=C4=C1=AC=D0=F8=B6=C1=C8=A1=B7=BD=B7=A8=
=A1=B7(=D4=AD=CE=C4)=BA=F3=A3=AC=B1=CA=D5=DF=C8=CF=CE=AA=B8=C3=CE=C4=B2=A2=
=CE=B4=BE=CD=B4=CB=CE=CA=CC=E2=BD=F8=D0=D0=C9=EE=C8=EB=D7=BC=C8=B7=B5=C4=B7=
=D6=CE=F6=A1=A3=CE=C4=D5=C2=D6=D0=CC=E1=B5=BD=B5=C4=C1=BD=D6=D6=BD=E2=BE=F6=
=B7=BD=B7=A8=B2=A2=B2=BB=D6=B1=BD=D3=BA=CD=BC=F2=B5=A5=A1=A3=B1=CA=D5=DF=C8=
=CF=CE=AA=D5=E2=B2=A2=B7=C7=CA=C7=20
Keil =
C51=D6=D0=B2=BB=C4=DC=B4=A6=C0=ED=B6=D4=D2=BB=B8=F6=B6=CB=BF=DA=BD=F8=D0=D0=
=C1=AC=D0=F8=B6=C1=D0=B4=B5=C4=CE=CA=CC=E2=A3=AC=B6=F8=CA=C7=B6=D4Keil=20
=
C51=B5=C4=CA=B9=D3=C3=B2=BB=B9=BB=CA=EC=CF=A4=BA=CD=C9=E8=BC=C6=B2=BB=B9=BB=
=CF=B8=D6=C2=B5=C4=CE=CA=CC=E2=A3=AC=D2=F2=B4=CB=CC=D8=D7=AB=D0=B4=B1=BE=CE=
=C4=A1=A3<BR><BR> =20
=
=B1=BE=CE=C4=D6=D0=B6=D4=D4=AD=CE=C4=CC=E1=B5=BD=B5=C4=CE=CA=CC=E2=A3=AC=CC=
=E1=B3=F6=C1=CB=C8=FD=D6=D6=B2=BB=CD=AC=D3=DA=D4=AD=CE=C4=B5=C4=BD=E2=BE=F6=
=B7=BD=B7=A8=A1=A3=C3=BF=D6=D6=B7=BD=B7=A8=B6=BC=B1=C8=D4=AD=CE=C4=D6=D0=CC=
=E1=B5=BD=B5=C4=B7=BD=B7=A8=B8=FC=D6=B1=BD=D3=BA=CD=BC=F2=B5=A5=A3=AC=C9=E8=
=BC=C6=D2=B2=B8=FC=B9=E6=B7=B6=A1=A3(=CE=DE=D2=E2=C5=FA=C6=C0=A3=AC=C7=EB=
=D4=AD=CE=C4=D7=F7=D5=DF=BC=FB=C1=C2)<BR><BR><BR>1=20
=
=CE=CA=CC=E2=BB=D8=B9=CB=BA=CD=B7=D6=CE=F6<BR><BR> =20
=
=D4=AD=CE=C4=D6=D0=CC=E1=B5=BD=A3=BA=D4=DA=CA=B5=BC=CA=B9=A4=D7=F7=D6=D0=D3=
=F6=B5=BD=B6=D4=CD=AC=D2=BB=B6=CB=BF=DA=B7=B4=B8=B4=C1=AC=D0=F8=B6=C1=C8=A1=
=A3=ACKeil=20
=
C5l=B1=E0=D2=EB=B2=A2=CE=B4=B4=EF=B5=BD=D4=A4=C6=DA=B5=C4=BD=E1=B9=FB=A1=A3=
=D4=AD=CE=C4=D7=F7=D5=DF=B6=D4C=B1=E0=D2=EB=B3=F6=C0=B4=B5=C4=BB=E3=B1=E0=
=B3=CC=D0=F2=BD=F8=D0=D0=B7=D6=CE=F6=B7=A2=CF=D6=A3=AC=B6=D4=CD=AC=D2=BB=B6=
=CB=BF=DA=B5=C4=B5=DA=B6=FE=B4=CE=B6=C1=C8=A1=D3=EF=BE=E4=B2=A2=CE=B4=B1=BB=
=B1=E0=D2=EB=A1=A3=B5=AB=BF=C9=CF=A7=D4=AD=CE=C4=D7=F7=D5=DF=B2=A2=CE=B4=B7=
=D6=CE=F6=C3=BB=D3=D0=B1=BB=B1=E0=D2=EB=B5=C4=D4=AD=D2=F2=A3=AC=B6=F8=CA=C7=
=B4=D2=C3=A6=B5=D8=B2=C9=D3=C3=D2=BB=D0=A9=B2=BB=CC=AB=B9=E6=B7=B6=B5=C4=B7=
=BD=B7=A8=CA=D4=D1=E9=B3=F6=C1=CB=C1=BD=D6=D6=BD=E2=BE=F6=B0=EC=B7=A8=A1=A3=
<BR><BR> =20
=B6=D4=B4=CB=CE=CA=CC=E2=A3=AC=B7=AD=D4=C4Keil=20
=
C51=B5=C4=CA=D6=B2=E1=BA=DC=C8=DD=D2=D7=B7=A2=CF=D6=A3=BAKellC51=B5=C4=B1=
=E0=D2=EB=C6=F7=D3=D0=D2=BB=B8=F6=D3=C5=BB=AF=C9=E8=D6=C3=A3=AC=B2=BB=CD=AC=
=B5=C4=D3=C5=BB=AF=C9=E8=D6=C3=A3=AC=BB=E1=B2=FA=C9=FA=B2=BB=CD=AC=B5=C4=B1=
=E0=D2=EB=BD=E1=B9=FB=A1=A3=D2=BB=B0=E3=C7=E9=BF=F6=C8=B1=CA=A1=B1=E0=D2=EB=
=D3=C5=BB=AF=C9=E8=D6=C3=B1=BB=C9=E8=B6=A8=CE=AA8=BC=B6=D3=C5=BB=AF=A3=AC=
=CA=B5=BC=CA=D7=EE=B8=DF=BF=C9=C9=E8=B6=A8=CE=AA9=BC=B6=D3=C5=BB=AF=A3=BA=
<BR><BR> =20
=A2=D9Dead code =
elimination=A1=A3<BR> =A2=DAData=20
overlaymg=A1=A3<BR> =
=A2=DBPeephole=20
optimization=A1=A3<BR> =
=A2=DCRegister=20
variables=A1=A3<BR> =
=A2=DDCommon subexpression=20
elimination=A1=A3<BR> =
=A2=DELoop=20
rotation=A1=A3<BR> =
=A2=DFExtended Index Access=20
0ptimizing=A1=A3<BR> =
=A2=E0Reuse Common=A1=A3Entry=20
Code=A1=A3<BR> =A2=E1Common =
Block=20
Subroutines=A1=A3<BR><BR> =
=B6=F8=D2=D4=C9=CF=B5=C4=CE=CA=CC=E2=A3=AC=D5=FD=CA=C7=D3=C9=D3=DAKeiI=20
=
C5l=B1=E0=D2=EB=D3=C5=BB=AF=B2=FA=C9=FA=B5=C4=A1=A3=D2=F2=CE=AA=D4=DA=D4=AD=
=CE=C4=B3=CC=D0=F2=D6=D0=BD=AB=CD=E2=C9=E8=B5=D8=D6=B7=D6=B1=BD=D3=B0=B4=C8=
=E7=CF=C2=B6=A8=D2=E5=A3=BA<BR> =20
unsigned char xdata=20
MAXl97_at_Ox8000=A3=BB<BR><BR> =
=
=B2=C9=D3=C3_at_=BD=AB=B1=E4=C1=BFMAXl97=B6=A8=D2=E5=B5=BD=CD=E2=B2=BF=C0=
=A9=D5=B9RAM=D6=B8=B6=A8=B5=D8=D6=B7Ox8OOO=A1=A3=D2=F2=B4=CB=A3=ACKeil=20
=
C51=D3=C5=BB=AF=B1=E0=D2=EB=C0=ED=CB=F9=B5=B1=C8=BB=C8=CF=CE=AA=D6=D8=B8=B4=
=B6=C1=B5=DA=B6=FE=B4=CE=CA=C7=C3=BB=D3=D0=D3=C3=B5=C4=A3=AC=D6=B1=BD=D3=D3=
=C3=B5=DA=D2=BB=B4=CE=B6=C1=C8=A1=B5=C4=BD=E1=B9=FB=BE=CD=BF=C9=D2=D4=C1=CB=
=A3=AC=D2=F2=B4=CB=B1=E0=D2=EB=C6=F7=CC=F8=B9=FD=C1=CB=B5=DA=B6=FE=CC=F5=B6=
=C1=C8=A1=D3=EF=BE=E4=A1=A3=D6=C1=B4=CB=A3=AC=CE=CA=CC=E2=BE=CD=D2=BB=C4=BF=
=C1=CB=C8=BB=C1=CB=A1=A3<BR><BR><BR>2 =20
=
=BD=E2=BE=F6=B7=BD=B7=A8<BR><BR> =20
=
=D3=C9=D2=D4=C9=CF=B7=D6=CE=F6=BA=DC=C8=DD=D2=D7=BE=CD=C4=DC=CC=E1=B3=F6=BA=
=DC=BA=C3=B5=C4=BD=E2=BE=F6=B0=EC=B7=A8=A1=A3<BR><BR>2.1 =20
=
=D7=EE=BC=F2=B5=A5=D7=EE=D6=B1=BD=D3=B5=C4=B0=EC=B7=A8<BR><BR>  =
; =
=B3=CC=D0=F2=D2=BB=B5=E3=B6=BC=B2=BB=D3=C3=D0=DE=B8=C4=A3=AC=BD=ABKeil=20
=
C5l=B5=C4=B1=E0=D2=EB=D3=C5=BB=AF=D1=A1=D4=F1=C9=E8=D6=C3=CE=AA0(=B2=BB=D3=
=C5=BB=AF)=BE=CD=BF=C9=D2=D4=C1=CB=A1=A3<BR><BR> =20
=
=D1=A1=D4=F1project=B4=B0=BF=DA=B5=C4Target=A3=AC=C8=BB=BA=F3=B4=F2=BF=AA=
=A1=B0Options=20
=
forTarget=A1=B1=C9=E8=D6=C3=B6=D4=BB=B0=BF=F2=A3=AC=D1=A1=D4=F1=A1=B0C5l=A1=
=B1=D1=A1=CF=EE=BF=A8=A3=AC=BD=AB=A1=B0Code=20
=
Optimiztaion=A1=B1=D6=D0=B5=C4=A1=B0Level=A1=B1=D1=A1=D4=F1=CE=AA=A1=B00=A3=
=BACostant=20
=
folding=A1=B1=A1=A3=D4=D9=B4=CE=B1=E0=D2=EB=BA=F3=A3=AC=B4=F3=BC=D2=BB=E1=
=B7=A2=CF=D6=B1=E0=D2=EB=BD=E1=B9=FB=CE=AA=A3=BA<BR><BR>  =
; CLR=20
MAXHBEN<BR> MOV=20
DPTR=A3=AC#M=A3=AEAXl97<BR> =
MOVX=20
A=A3=AC@DPTR<BR> MOV=20
R7=A3=AEA<BR> MOV=20
down8=A3=AER7<BR> SETB=20
MAXHBEN<BR> MOV=20
DPTR=A3=AC#MAXl97<BR> MOVX=20
A=A3=AC@DPTR<BR> MOV=20
R7=A3=AEA<BR> MOV=20
uD4=A3=AER7<BR> =20
=
=C1=BD=B4=CE=B6=C1=C8=A1=B2=D9=D7=F7=B6=BC=B1=BB=B1=E0=D2=EB=B3=F6=C0=B4=C1=
=CB=A1=A3<BR><BR>2.2 =20
=
=D7=EE=BA=C3=B5=C4=B7=BD=B7=A8<BR><BR> =
=B8=E6=CB=DFKeil=20
=
C51=A3=AC=D5=E2=B8=F6=B5=D8=D6=B7=B2=BB=CA=C7=D2=BB=B0=E3=B5=C4=C0=A9=D5=B9=
RAM=A3=AC=B6=F8=CA=C7=C1=AC=BD=D3=B5=C4=C9=E8=B1=B8=A3=AC=BE=DF=D3=D0=A1=B0=
=BB=D3=B7=A2=A1=B1=CC=D8=D0=D4=A3=AC=C3=BF=B4=CE=B6=C1=C8=A1=B6=BC=CA=C7=D3=
=D0=D2=E2=D2=E5=B5=C4=A1=A3<BR><BR> =20
=
=BF=C9=D2=D4=D0=DE=B8=C4=B1=E4=C1=BF=B6=A8=D2=E5=A3=AC=D4=F6=BC=D3=A1=B0v=
olatile=A1=B1=B9=D8=BC=FC=D7=D6=CB=B5=C3=F7=C6=E4=CC=D8=D5=F7=A3=BA<BR>&n=
bsp; =20
unsigned char volatile xdata=20
MAXl97_at_Ox8000=A3=BB<BR><BR> =
=
=D2=B2=BF=C9=D2=D4=D4=DA=B3=CC=D0=F2=D6=D0=B0=FC=BA=AC=CF=B5=CD=B3=CD=B7=CE=
=C4=BC=FE=A3=BA=A1=B0#incIude<ab=A1=AAsacc=A3=AEh>=A1=B1=A3=AC=C8=BB=
=BA=F3=D4=DA=B3=CC=D0=F2=D6=D0=D0=DE=B8=C4=B1=E4=C1=BF=A3=AC=B6=A8=D2=E5=CE=
=AA=D6=B1=BD=D3=B5=D8=D6=B7=A3=BA<BR><BR> =20
#defme MAXl97=20
XBYTE[Ox8000]<BR><BR><BR> =
=D5=E2=D1=F9=A3=AC=A1=A3Keil=20
=
C51=B5=C4=C9=E8=D6=C3=C8=D4=C8=BB=BF=C9=D2=D4=B1=A3=C1=F4=B8=DF=BC=B6=D3=C5=
=BB=AF=A3=AC=C7=D2=B1=E0=D2=EB=BD=E1=B9=FB=D6=D0=A3=AC=CD=AC=D1=F9=C1=BD=B4=
=CE=B6=C1=C8=A1=B2=A2=B2=BB=BB=E1=B1=BB=D3=C5=BB=AF=CC=F8=B9=FD=A1=A3<BR>=
<BR>2.3 =20
=
=D3=B2=BC=FE=BD=E2=BE=F6=B7=BD=B7=A8<BR><BR> =20
=
=D4=AD=CE=C4=D6=D0=BD=ABMAXl97=B5=C4=CA=FD=BE=DD=D6=B1=BD=D3=C1=AC=BD=D3=B5=
=BD=CA=FD=BE=DD=D7=DC=CF=DF=A3=AC=B6=F8=B6=D4=B5=D8=D6=B7=D7=DC=CF=DF=B2=A2=
=CE=B4=CA=B9=D3=C3=A3=AC=B2=C9=D3=C3=D2=BB=B8=F9=B6=CB=BF=DA=CF=DF=D1=A1=D4=
=F1=B2=D9=D7=F7=B8=DF=B5=CD=D7=D6=BD=DA=A1=A3=BA=DC=BC=F2=B5=A5=B5=C4=D0=DE=
=B8=C4=B7=BD=B7=A8=BE=CD=CA=C7=CA=B9=D3=C3=D2=BB=B8=F9=B5=D8=D6=B7=CF=DF=D1=
=A1=D4=F1=B2=D9=D7=F7=B8=DF=B5=CD=D7=D6=BD=DA=BC=B4=BF=C9=A1=A3=B1=C8=C8=E7=
=A3=BA=BD=ABP2=A3=AE0(A8)=C1=AC=BD=D3=B5=BD=D4=AD=C0=B4P1=A3=AEO=C1=AC=BD=
=D3=B5=C4HBEN=BD=C5(MAXl97=B5=C45=BD=C5)=A3=AC=D4=DA=B3=CC=D0=F2=D6=D0=B7=
=D6=B1=F0=B6=A8=D2=E5=B8=DF=B5=CD=D7=D6=BD=DA=B5=C4=B2=D9=D7=F7=B5=D8=D6=B7=
=A3=BA<BR><BR> =20
unsigned char volatile xdata=20
MAXl97_L_aI_Ox8000;<BR> =
unsigned char=20
volatile xdata MAXl97 H at=20
0=A3=AEx8100=A3=BB<BR> =20
=
=BD=AB=D4=AD=C0=B4=B5=C4=B3=CC=D0=F2=A3=BA<BR> =
MAXHBEN=3DO=A3=BB=20
=
=A3=AF=A3=AF=B6=C1=C8=A1=B5=CD8=CE=BB<BR> =20
down8=3DMAXl97=A3=BA<BR> =
MAXHBEN=3D1=A3=BB=20
=
=A3=AF=A3=AF=B6=C1=C8=A1=B8=DF4=CE=BB<BR> =20
up4=3DMAXl97=A3=BA<BR> =20
=
=B8=C4=CE=AA=D2=D4=CF=C2=C1=BD=BE=E4=BC=B4=BF=C9=A3=BA<BR> &nb=
sp; down8=3DMAXl97_L=A3=BB=20
=
=A3=AF=A3=AF=B6=C1=C8=A1=B5=CD8=CE=BB<BR> =
up4=3DMAXl97_H=A3=BB=20
=
=A3=AF=A3=AF=B6=C1=C8=A1=B8=DF4=CE=BB<BR><BR>3 =
=D0=A1=BD=E1<BR><BR> Keil=20
=
C51=BE=AD=B9=FD=B3=A4=C6=DA=BF=BC=D1=E9=BA=CD=B8=C4=BD=F8=D2=D4=BC=B0=B4=F3=
=C1=BF=BF=AA=B7=A2=C8=CB=D4=B1=B5=C4=CA=B5=BC=CA=CA=B9=D3=C3=A3=AC=D2=D1=BE=
=AD=BF=CB=B7=FE=C1=CB=BE=F8=B4=F3=B6=E0=CA=FD=B5=C4=CE=CA=CC=E2=A3=AC=B2=A2=
=C7=D2=C6=E4=B1=E0=D2=EB=D0=A7=C2=CA=D2=B2=B7=C7=B3=A3=B8=DF=A1=A3=B6=D4=D3=
=DA=D2=BB=B0=E3=B5=C4=CA=B9=D3=C3=A3=AC=BA=DC=C4=D1=D4=D9=B7=A2=CF=D6=CA=B2=
=C3=B4=CE=CA=CC=E2=A1=A3=B1=CA=D5=DF=D4=F8=BE=AD=B4=D6=C2=D4=D1=D0=BE=BF=B9=
=FD=D2=BB=CF=C2Keil=20
=
C51=D3=C5=BB=AF=B1=E0=D2=EB=B5=C4=BD=E1=B9=FB=A3=AC=B7=C7=B3=A3=C5=E5=B7=FE=
Keil=20
=
C51=C9=E8=BC=C6=D5=DF=B5=C4=D6=C7=BB=DB=A3=AC=D2=BB=D0=A9C=B3=CC=D0=F2=B1=
=E0=D2=EB=B2=FA=C9=FA=B5=C4=BB=E3=B1=E0=B4=FA=C2=EB=A3=AC=C9=F5=D6=C1=B1=C8=
=D2=BB=B0=E3=B3=CC=D0=F2=D4=B1=D6=B1=BD=D3=D3=C3=BB=E3=B1=E0=B1=E0=D0=B4=B5=
=C4=B4=FA=C2=EB=BB=B9=D2=AA=D3=C5=D0=E3=BA=CD=BC=F2=C1=B7=A1=A3=CD=A8=B9=FD=
=D1=D0=B6=C1KeilC51=B1=E0=D2=EB=B2=FA=C9=FA=B5=C4=BB=E3=B1=E0=B4=FA=C2=EB=
=A3=AC=B6=D4=CC=E1=B8=DF=BB=E3=B1=E0=D3=EF=D1=D4=B1=E0=D0=B4=B3=CC=D0=F2=B5=
=C4=CB=AE=C6=BD=B6=BC=CA=C7=BA=DC=D3=D0=B0=EF=D6=FA=B5=C4=A1=A3<BR><BR>&n=
bsp; =20
=
=D3=C9=B1=BE=CE=C4=D6=D0=B5=C4=CE=CA=CC=E2=BF=C9=D2=D4=BF=B4=B3=F6=A3=BA=D4=
=DA=C9=E8=BC=C6=D6=D0=D3=F6=B5=BD=CE=CA=CC=E2=CA=B1=A3=AC=D2=BB=B6=A8=B2=BB=
=D2=AA=B1=BB=B1=ED=C3=E6=CF=D6=CF=F3=C3=C9=B1=CE=A3=AC=B2=BB=D2=AA=BC=B1=D3=
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