📄 chapter18 fsm.mht
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<BR> else =20
<BR> PRES_STATE =
=3D=20
NEXT_STATE; <BR>end =20
<P>endmodule</P></TD></TR></TBODY></TABLE> </TD></TR>
<TR>
<TD>18.2.5 =C9=E8=BC=C6=CF=DE=D6=C6 =20
=
<P>=CA=B1=BC=E4=CA=C7=CE=A8=D2=BB=B5=C4=C9=E8=BC=C6=CF=DE=D6=C6=A3=AC=B4=CB=
=CD=E2=BB=F9=B1=BE=B5=C4=D6=C6=B3=CC=CC=F5=BC=FE=B5=B1=C8=BB=D2=AA=C2=FA=D7=
=E3=A1=A3 <BR> </P></TD></TR>
<TR>
<TD>18.2.6 =C2=DF=BC=AD=BA=CF=B3=C9 =20
=
<P>=CE=D2=C3=C7=C8=C3=C8=ED=CC=E5=D2=BB=BF=DA=C6=F8=D7=F6=CD=EA=CB=F9=D3=D0=
=B5=C4=B9=A4=D7=F7=A3=AC=D2=BB=D6=B1=B5=BD=CB=CD=B3=F6=C2=DF=BC=AD=D5=A2=B2=
=E3=B4=CE=B5=C4=C9=E8=BC=C6=CE=AA=D6=B9=A1=A3 =
<BR> </P></TD></TR>
<TR>
<TD>18.2.7 =
=D7=EE=BC=D1=BB=AF=E1=E1=B5=C4=C2=DF=BC=AD=D5=A2=B2=E3=B4=CE=B5=C4=C9=E8=BC=
=C6 =20
=
<P>=BE=AD=D3=C9=CA=B9=D3=C3Compass=B5=C4=D7=CA=C1=CF=BF=E2=A3=AC=CE=D2=C3=
=C7=BF=C9=D2=D4=B2=FA=C9=FA=C8=E7=B7=B6=C0=FD14-7=CB=F9=CA=BE=C2=DF=BC=AD=
=BA=CF=B3=C9=E1=E1=B5=C4=B5=B5=B0=B8=A1=A3 =20
<P>=B7=B6=C0=FD18-2 =
=BE=AD=B9=FD=D7=EE=BC=D1=BB=AF=E1=E1=B5=C4=C2=DF=BC=AD=B2=E3=B4=CE=B3=CC=CA=
=BD <BR> =20
<TABLE border=3D0 cols=3D1 width=3D"90%">
<TBODY>
<TR>
<TD>module vend ( coin, clock, reset, newspaper ); =20
<BR>input [1:0] coin; <BR>input clock,=20
reset; <BR>output newspaper; =
<BR> wire=20
\PRES_STATE[1] , \PRES_STATE[0] , n298, n299, n300, n301, =
n302,=20
n303, <BR> =
n304,=20
n305, n306, n307, n309, \*cell*21/U2/Z_1 , \*cell*21/U2/Z_0 =
; =20
<BR> an02d1 U88 ( .a1(\PRES_STATE[1] ),=20
.a2(\PRES_STATE[0] ), .z(newspaper) ); =
<BR> =20
nr02d0 U89 ( .a1(coin[1]), .a2(n299), .zn(n298) ); =20
<BR> in01d0 U90 ( .i(coin[0]), .zn(n299) =
); =20
<BR> in01d0 U91 ( .i(reset), .zn(n309) =
); =20
<BR> nd02d0 U92 ( .a1(n299), .a2(coin[1]), =
.zn(n300) ); <BR> nd02d0 U93 (=20
.a1(\PRES_STATE[0] ), .a2(n298), .zn(n301) ); =20
<BR> in01d0 U94 ( .i(\PRES_STATE[0] ), =
.zn(n302)=20
); <BR> nd02d0 U95 ( .a1(n300), =
.a2(n301),=20
.zn(n303) ); <BR> mx21d1 U96 ( =
.i0(n303),=20
.i1(n302), .s(\PRES_STATE[1] ), .z( =20
<BR> =
\*cell*21/U2/Z_1 )=20
); <BR> in01d0 U97 ( .i(n298), =
.zn(n304)=20
); <BR> nd03d0 U98 ( .a1(coin[1]),=20
.a2(n299), .a3(\PRES_STATE[1] ), .zn(n305) ); =20
<BR> nd02d0 U99 ( .a1(n304), .a2(n305), =
.zn(n306)=20
); <BR> nr02d0 U100 ( =
.a1(\PRES_STATE[1] ),=20
.a2(n298), .zn(n307) ); <BR> mx21d1 =
U101 (=20
.i0(n306), .i1(n307), .s(\PRES_STATE[0] ), .z( =20
<BR> =
\*cell*21/U2/Z_0 )=20
); <BR> mfntnb =
\PRES_STATE_reg[1] (=20
.da(\*cell*21/U2/Z_1 ), .db(1'b0), .sa(n309), =20
<BR> .cp(clock),=20
.q(\PRES_STATE[1] ) ); <BR> mfntnb=20
\PRES_STATE_reg[0] ( .da(\*cell*21/U2/Z_0 ), =
.db(1'b0),=20
.sa(n309), =
<BR> =20
.cp(clock), .q(\PRES_STATE[0] ) ); <BR>endmodule =
<BR> <BR> </TD></TR></TBODY></TABLE> =20
=
<P>=CF=E0=B6=D4=D3=A6=B5=C4=C2=DF=BC=AD=D5=A2=CD=BC=D0=E3=D4=DA=CD=BC18-3=
=D6=D0=A1=A3 <BR> =20
<TABLE border=3D1 width=3D"90%">
<TBODY>
<TR>
<TD><IMG height=3D600=20
=
src=3D"file:///E:/10%20H%20D%20L/Verilog/%5B1%5D=CC=A8=CD=E5=C7=E5=BB=AAV=
erilog%20HDL=BD=CC=B3=CC/fig18-1.GIF"=20
width=3D800></TD></TR></TBODY></TABLE>=CD=BC18-3 =
=BA=CF=B3=C9=B5=C4=BD=E1=B9=FB =20
<P> </P></TD></TR>
<TR>
<TD>18.2.8 =D1=E9=D6=A4 =20
=
<P>=B2=FA=C9=FA=BA=C3=C1=CB=C9=E8=BC=C6=B5=B1=C8=BB=D2=AA=C0=B4=D1=E9=D6=A4=
=D2=BB=CF=C2=D5=FD=C8=B7=D3=EB=B7=F1=A1=A3=CE=D2=C3=C7=BD=AB=B7=B6=C0=FD1=
4-8=B5=C4=B2=E2=CA=D4=C4=A3=D7=E9=CD=AC=CA=B9=B8=F8=D3=E8=BA=CF=B3=C9=C7=B0=
=E1=E1=B5=C4=C4=A3=D7=E9=D6=B4=D0=D0=A1=A3 <BR> =20
<BR>=B7=B6=C0=FD18-3 =
=B1=A8=D6=BD=B7=B7=C2=F4=BB=FA=B5=C4=B2=E2=CA=D4=C4=A3=D7=E9 =
<BR> =20
<TABLE border=3D0 cols=3D1 width=3D"90%">
<TBODY>
<TR>
<TD>module stimulus; <BR>reg clock; <BR>reg [1:0]=20
coin; <BR>reg reset; <BR>wire newspaper; =20
<P>vend vendY(coin, clock, reset, newspaper); =20
<P>initial <BR>begin <BR> =
$display("\t\tTime=20
Reset Newspaper\n"); <BR> =
$monitor("%d %d=20
%d",$time, reset, newspaper); <BR>end =20
<P>initial <BR>begin <BR> =
clock=20
=3D0; <BR> coin =3D 0; =20
<BR> reset =3D 1; =
<BR> =20
#50 reset =3D 0; <BR> =
@(negedge=20
clock); =20
<P> =
//=B7=C5=C8=EB=C8=FE=B8=F6=CE=E5=D4=AA <BR> #80 =
coin=20
=3D 1; #40 coin =3D 0; <BR> #80 coin =
=3D 1; #40=20
coin =3D 0; <BR> #80 coin =3D 1; #40 =
coin =3D=20
0; =20
<P> =
//=B7=C5=C8=EB=D2=BB=B8=F6=CE=E5=D4=AA=A3=AC=D2=BB=B8=F6=CA=AE=D4=AA =
; <BR> =20
#180 coin =3D 1; #40 coin =3D 0; =
<BR> #80 coin =3D=20
2; #40 coin =3D 0; =20
<P> =
//=B7=C5=C8=EB=C1=BD=B8=F6=CA=AE=D4=AA <BR> #180 =
coin =3D 2; #40 coin =3D 0; <BR> #80 =
coin =3D 2;=20
#40 coin =3D 0; =20
<P> =
//=B7=C5=C8=EB=D2=BB=B8=F6=CA=AE=D4=AA=A3=AC=D2=BB=B8=F6=CE=E5=D4=AA =
; <BR> =20
#180 coin =3D 2; #40 coin =3D 0; =
<BR> #80 coin =3D=20
1; #40 coin =3D 0; =20
<P> #80 $finish; <BR>end =20
<P> always <BR> begin =
<BR> #20=20
clock =3D ~clock; <BR> end =20
=
<P>endmodule</P></TD></TR></TBODY></TABLE>=D6=B4=D0=D0=C4=A3=C4=E2=B5=C4=BD=
=E1=B9=FB=C8=E7=CF=C2=CB=F9=CA=BE=A1=A3 =20
=
<P>=B7=B6=C0=FD18-4=B1=A8=D6=BD=B7=B7=C2=F4=BB=FA=B5=C4=B2=E2=CA=D4=CA=E4=
=B3=F6 <BR> =20
<TABLE border=3D0 width=3D"60%">
<TBODY>
<TR>
<TD>Time</TD>
<TD>Reset</TD>
<TD>Newspaper</TD></TR>
<TR>
<TD>0</TD>
<TD>1</TD>
<TD>x</TD></TR>
<TR>
<TD>20</TD>
<TD>1</TD>
<TD>0</TD></TR>
<TR>
<TD>50</TD>
<TD>0</TD>
<TD>0</TD></TR>
<TR>
<TD>420</TD>
<TD>0</TD>
<TD>1</TD></TR>
<TR>
<TD>460</TD>
<TD>0</TD>
<TD>0</TD></TR>
<TR>
<TD>780</TD>
<TD>0</TD>
<TD>1</TD></TR>
<TR>
<TD>820</TD>
<TD>0</TD>
<TD>0</TD></TR>
<TR>
<TD>1100</TD>
<TD>0</TD>
<TD>1</TD></TR>
<TR>
<TD>1140</TD>
<TD>0</TD>
<TD>0</TD></TR>
<TR>
<TD>1460</TD>
<TD>0</TD>
<TD>1</TD></TR>
<TR>
<TD>1500</TD>
<TD>0</TD>
<TD>0</TD></TR></TBODY></TABLE> =20
=
<P>=C8=BB=E1=E1=BD=AB=CF=DF=C2=B7=CD=BC=A3=AC=CB=CD=B8=F8ABC=B9=AB=CB=BE=A3=
=AC=C8=BB=E1=E1=B9=FD=D2=BB=B6=CE=CA=B1=BC=E4=E1=E1=A3=AC=CB=FB=C3=C7=BB=E1=
=BD=ABIC=D6=C6=D4=EC=BA=C3=A1=A3 =20
<BR> </P></TD></TR></TBODY></TABLE> <BR> =20
<P>18.3 =BD=E1=C2=DB <BR> =20
<TABLE border=3D0 width=3D"90%">
<TBODY>
<TR>
=
<TD>=B1=BE=D5=C2=D6=D0=CC=D6=C2=DB=BC=B8=CF=EE=D6=D8=B5=E3=A3=AC=B7=D6=CA=
=F6=C8=E7=CF=C2=A3=BA =20
<UL>
=
<LI>=C9=E8=BC=C6FSM=D6=AE=C7=B0=A3=AC=B1=D8=D0=EB=CF=C8=C8=B7=B6=A8FSM=B5=
=C4=C4=A3=D0=CD=D6=D6=C0=E0=A1=A3=20
=
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