4.3 ??MSI?????????

1
? 4 ? ??????
4.1 ????????? 4.2 ????????? 4.3 ??MSI?????????
4.4 ?????????????
2
4.1 ?????????
?????????,??????????????????????,??????????
?????????????? ? ? ?????????,??????,??????
??????????? ? ? ??????????????? ? ?
??????????????
3
??4-1? ???4-2?????????????? ? ?????????,
????????????????
4
(No Transcript)
5
? 4-1 ?4-1???
A B C F
0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1 0 0 0 1 0 1 1 1
????????,????????,????????????????1,?????F?
1,???0,??????????????????????????????????????
6
??4-2????4-3(a)????,???????????
? 4-3 ?4-2??? (a) ????? (b) ???????
7
? ? ? ????????
? ?????
? 4 - 2 ?4 - 2???
Ai Bi Ci Ci1 Si
0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1 0 0 0 1 0 1 1 0 0 1 1 0 1 0 1 1
8
? ????? ? ??????,???????Ai?Bi?Ci????
?1??????1?,??Si1,??????????????????1?,??Ci11,??
????Ai?Bi?Ci???????????????,??????????????,Ai?Bi??
??????????????????, Ci?????????,Si????,Ci1???????
?????????????4 - 3(b)???
???????????,?Ci0,???????????,?????????????4-3??4-
4???
9
? 4-3 ??????
Ai Bi Ci1 Si
0 0 0 1 1 0 1 1 0 0 0 1 0 1 1 0
? 4-4 ???
10
4.2 ?????????
????????,????????????,?????????????? ?
? ???????????,???????,??????????????????????
?? ? ??????,???????,?????????? ? ?
???,???????
11
?????????????????????,??????????????,
??????????? ???????????,?????????? ?
???????????????????,??????????????????????????????
????????????????,???????????????,????????????????
?????????????????????
12
??????????????????? ? ?
??????????????????????????,?????????,?????
????????????0?1????????????????????,???0?1
??????????????????????????? ? ?
?????????????????????????????????????,???MSI??????
?????,?????????,??????????????,?????????,?????????
??????? ? ? ???????????????,??????????????
??SSI??????,????????????,???????????,?????????????
??? ? ?????????????????????????
13
??4-3??????????? ? ????? ?
?????????????An???Bn?????????Cn??????????Dn???
??????C n1, ?????4 - 5(a)???
? 4-4 ??????
An Bn Cn Cn1 Dn
0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1 0 0 1 1 1 1 1 0 0 1 0 0 0 0 1 1
14
? 4-5 ??????K? (a) ?? (b) Cn1 (c) Dn
15
? ???? ? ?????????????????? ?
? ??????? ? ????Cn1?Dn?K???4-5(b)?(c)
??,????????????Cn1?Dn????????????????????????,???
????????,????????????????,??????????????
???????????,???0????????????
16
??????????,?????????
?? ?Dn?Cn1?????
17
? ??????? ?
? 4 6 ??????
18
??4-4??????????8421 BCD?????3??????? ?
? ? ? ????, ????? ?
??????8421 BCD?,????3?,????????????????????,?????4
-7(a)???????BCD??????,?????,??4-5?????8421
BCD?????10101111?????, ??????????
19
? ????,?????????? ?
???????????????,??????????????????????????,???????
??????????4-7(b)??,?????????,?????????????????????
??????????,??????????,?????????,??????????
20
? 4 7 ?4 - 4???K?
21
? ?????? ? ???????????,????,?????4-8???
? 4 5 ?4-4???
A B C D E3 E2 E1 E0
0 0 0 0 0 0 0 1 0 0 1 0 0 0 1 1 0 1 0 0 0 1 0 1 0 1 1 0 0 1 1 1 1 0 0 0 1 0 0 1 1 0 1 0 1 0 1 1 1 1 0 0 1 1 0 1 1 1 1 0 1 1 1 1 0 0 1 1 0 1 0 0 0 1 0 1 0 1 1 0 0 1 1 1 1 0 0 0 1 0 0 1 1 0 1 0 1 0 1 1 1 1 0 0
22
? 4 8 8421 BCD?????3????
23
4.3 ??MSI?????????
4.3.1 ???? ?????????????????????????
????????????????????????? ????????????????????????
??????,????????????????????????
24
1. ?????? ?n???????N2n????????????,
???????????n3,???8??????????????????????????????
?????,???????????????????,???????????(????)????
? ????????????,????????????4-9????????????,
?????I0I78??????,??????????F2?F1?F0???,?????8?3?
????????? ???????4-6???
25
? 4 9 ?????8?3??????
26
? 4 6 ????????????
? ? ? ?
I0 I1 I2 I3 I4 I5 I6 I7 F2 F1 F0
1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1
27
??4 - 6????????????
??????I0I7?????????1,?????????????,??
28
? 4 10 ????????
29
2. ????(BCD)???? ?????0? 1? 2?
3? 4? 5? 6? 7? 8? 9 ?10??????????????????????????
????09?10????????,?????1(?????1?,
??????????),??????BCD?,????10?4?????????????????,
???????????????? ? ??,????????8421BCD???,?
????????,??????????4-7????????????1?????????,?????
?????????
30
(No Transcript)
31
? 4 7 8421 BCD????
32
? 4 - 11?8421BCD????
33
3. ?????? ???????????????????????
?????,?????????????????,?????????????????????,????
??????????????MSI??????10?4?(?74LS147)?
8?3?(?74LS148)? 74LS148???????????????4
-12????????4-8???
34
? 4 12 74LS148????
35
? 4 8 74LS148????
36
?4 - 12?,??????????,????????
70????????,?????,7???????,0????? ?
C?B?A ???(??)???,C???? ?
E1???(??)???,??????E10?,???????E11?,??????,??C
?B?A?????E0?CS??????????????,??????????
37
????????,?E11?,????????,???70???????,??C
?B?A??1,??CSE01??E10?,????????,??70?????(????)
??,???C?B?A???????????????(?????),??CS0,E01??7
0????????,???C?B?A?????,??CS1, E00?
????????E0?CS?????E00,CS1?,?????????,??????E01
,CS0?,?????????,???????E0CS1?,?????????,??????

38
(No Transcript)
39
? 4 13 24??????????
40
??,??????????????????????, ??????(E0)?,??????????
???? ?????????????????
41
? 4 9 24??????
42
?4-14?38????????,?????4-10?????,A2?A1?A0?
?????,A2???? ????????,??????E1?E2A?E2B?
???????????,???E1??,E2A?E2B????,?????????????????
??????,??????,??????
? 4 14 38???????
43
? 4 10 38??????
44
??,??????(E1)?,????????????????????? ?
???????????,?????????? ? ?
??????????? ? ? ?????? ? ?
???????????????????????
45
?? 4 - 5? ??38???????
??????????????,????
, ???????????????????????,?????????????,??????????
? ??F1?F2???????,??????????ABCA2A1A0,???F
1?F2???????????
46
? 4 15 ?4 - 5???
47
2. ???????? ?????????BCD???,????
???????BCD?(??????)??10??????????,????410?????
?? ?4-16????????74LS42?????????? ?????4
- 11???
48
? 4 16 ???????74LS42
49
? 4 11 ???????74LS42????  
50
3. ?????? ?????????,??????????????,
?????????MSI??????????????????,??????????BCD??????
,?????????(LED)??????????????????7??8????????,????
????BCD???BCD????????????LED????BCD???????,???????
??
51
?????(LED)?????????????
???????,??????,?????????????LED????(??????)?
??????(LED???)?7????? ??,???????????????????
??????,??????,????????????????????????,???????????
?? LED?????????????4 - 17(a)????LED???????,?4-17(b
)??????????,??????,7???ag????BCD????????(??),??4
- 17(c)???
52
? 4 17 ???????
53
BCD???????????BCD?(?D?C?B?A??),???????????
??(?FaFg??),??47???????????LED???,????????,?????
(1)?,??????????,???8421?DCBA0100?,??? ,
???????b?c?f?g?, ??a?d?e?,?????????FaFg0110011,?
??????,????????,????09?10??????????8421BCD???????
??,??4 - 12(??????)?
54
? 4-12 BCD????????
55
MSI BCD????????????????,
????????,???????????????????????,????,????????????
,????????????4-17(c)?BCD???????LED???(??)??????,??
?????,??????,?????????????,?????????????????,?????
??????????????????????,???????????????????????
56
4.3.3 ?????
????????????(Multiplexer,
??MUX),?????4-18(a)?????n??????2n??????1??????????
?????,??????????????,??????????????,??4 - 18(b)?
? 4 18 ????????????
57
?????????2?1?4?1?8?1?16?1???
?4-19?4?1????????????,??D0D3??????,???????A1?A0?
?????,???????Y????E????,???????E1?,??Y0,???,?E
0?,?????A1?A0????,?D0D3???????,??????4-13?
? 4 13 4?1 MUX???
E A1 A0 Y
0 0 0 0 1 0 0 0 1 1 0 1 1 D0 D1 D2 D3 0
58
? 4 19 4?1 MUX
59
?E0?,4?1 MUX????????????????
??,mi?????A1?A0???????,??????? ?(4 -
13)???????????
60
??(A1A0)m??????????,(D0D1D2D3)T??D0?D1?D2?D3??????
??? ?? ?4-20?8?1 MUX?????,??????4-14??,
??????
? 4 20 8?1MUX????
61
? 4 14 8?1 MUX???
E A2 A1 A0 Y
1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 1 01 1 1 0 D0 D1 D2 D3 D4 D5 D6 D7
62
1. ????????? ??????????,??????????? ? ?
?????,???????????? ? ? ????????? ? ?
????????????? ? ? ???????
??n??????MUX,?????
63
??mi??????An-1??A1?A0????????????????l???????????
???????????
???mi?????????A?B?C????????
??Y?F????????,????????????A?B?C?
????????????,?????Di??,?FY,????MUX????F???,?MUX?
????????????Di?????
64
1) ln???? l?????????,n????MUX????????
?ln?,??????????A?B?C??????MUX??????,????F??????
?,??MUX?Di??(0?1)???lltn?,?MUX??????????(?0?1),???
??
65
?? 4-6? ??8?1MUX??????
?????F???????? ? ?F??K?,??4 -
21??,??K???
???8?1 MUX?,?
?A2A,A1B,A0C,??D1D2D3D4D5D71,D0D60??Y(
ABC)m(01111101)T m(1, 2, 3, 4, 5,
7),?FY??8?1MUX????F??????4-22???
66
? 4 21 ?4 - 6?K?
67
? 4-22 ?4 - 6????
??????,????F??????????A?B?C???4?2?1???,??A
?B?C??????A2?A1? A0??
68
2) lgtn???? ?????????l??MUX???????n?
,?????????????????l????????n?????MUX?????,??,???(l
-n)????????MUX?????Di?,?Di??????????,?????????????
???????Di? ? ?????Di??????????K???
69
?? 4-7? ??4?1MUX???????
? ? ? ????????,?A1A0AB,????????C,?
??Dif(c)? ? ? ?????Di? ?
?????F????????Y?????
70
?F?Y????
? 4 23 ?4 - 7????
71
(No Transcript)
72
?????K????,??????F????K???????Di?????4 -
24(d)F ?K????ABA1A0,?AB??(?????)????????F?K??????
?K?,??(d)?????????K????????????Di,??????????C??,?D
if(C)????K??????,???????Di??D01,D1C, D2C,
D30???,??????????,?????????
? ????F?K?? ? ? ??????? ? ? ?F?K???????Di???? ? ?
????Di? ? ? ??????
73
? 4-24 ?4-7????
74
??4-8???8?1MUX??????
? ??F????K???4 - 25(a)???
? 4 25 ? 4 - 8?F?K????Di
75
? ??????,?????Di?
???,???????????,?????????????? ?
???A2A1A0ABC,??????D? ?
??4-25(a)F?K??,??8?1MUX????Di???,??(a)??????????K?
??????D0D, D10, D21,D3D, D4D, D50, D61,
D7D,??F????
??????4 - 26(a)???
76
? 4 26 ?4 - 8????
77
???4 - 26(a)?(b)???,????A?C?D??????????,??
??????????????,????????????????????????,??????????
??????,????????????????????F?K???F??,?F???????????
??????????????,?????????
78
2. ????????
? ???????????4-27???4?1MUX???8?1
MUX???????A2?8?1MUX???????, A0????? ? ?
???????MUX????2n1?2n?1?MUX?????(2n)2?1?MUX? ?
??,n2,???5?4?1MUX??16?1MUX???4 - 28???
79
(No Transcript)
80
? 4 28 5?4?1MUX??16?1MUX
81
4.3.4 ?????
????????????(DEMUX),???????????,??????????
?n??????2n?????????4 - 29?14 DEMUX?????, ??????4
- 15?????D?????,A1?A0?????,Y0Y3?????,E?????
? 4 15 14 DEMUX???
E A1 A0 Y0 Y1 Y2 Y3
1 0 0 0 0 0 1 0 1 0 0 1 1 1 1 1 1 D 1 1 1 1 D 1 1 1 1 D 1 1 1 1 D
82
? 4-29 14DEMUX
83
???DEMUX?14DEMUX,18DEMUX,116
DEMUX????4-15??,14 DEMUX?24???????,???2-4???????
E???????D(??4 - 30(a)),?24?????????
????????????,???????mi?1,?????????YiD,???????????
???A? B,????????D?????????????,???????????,???????
?????4 - 30(b)??38?????18DEMUX???????
84
???????A?B?C?,YiD,????????????????
??????????????,???????????????,????MUX????????????
???,?????????????????????????????,???????????????,
??????4 - 31???
85
? 4 30 ??????DEMUX
86
? 4 31 ?????????
87
4.3.5 ?????
1. ????
? 4 32 ?????????????
88
??4 - 32??,????? 11 ????,?????,?????A3A0?B
3B0????????????????PAltB?PAB?PAgtB???????CAltB?CA
B? CAgtB????????,???????????????,???????????PAltB?P
AB?PAgtB??????????CAltB?CAB?CAgtB??????
89
? 4 16 ????????
90
??4-16???? ? ??PAgtB1(?A??B)????
???A3gtB3,???????????A2gtB2,????????????????A1gtB1,??
?????????A0gtB0,?????????????????CAgtB1? ?
??PAB1????A3B3,A2B2, A1B1,A0B0,
??????CAB?1? ? ??PAltB1?????????
91
2. ??????? ????????????????????????
???????????????????????, ??????????????
?? 4 - 9????????????????? ?
???????????,????????,?????????????,??????4 -
33???
92
? 4 33 ??????
93
4.3.6 ???
? 4 34 ???????????
94
? 4 35 ???????
95
?????????????4-35(c)??,???????????????????
??????
?GnAnBn,?????
????????,Gn???????,Pn???????????(4 -
18)?????????????,????????????(??????)???,?4 -
35(c)?P0?P1? P2?P3?????????,G0?G1?G2?G3???????????
,Cn1?Cn2?Cn3???????,FP?FG ?????????????????
?????
96
???????????????????????????????????,??????
??????????????????????,?????????????????????(0?1,
1?0),???????1, ?????????????????????,A-BA?B??1?
??????????????
97
??4-10? ???????????3??8421 BCD????? ?
? ????????????,?3?????8421BCD??3,??????3??8421
BCD????,????3???(0011)?????0011???????1100,??1,??
1101,??,?(0011)??(1101)?????,???????A3A0???3?????
?,B3?B2?B1?B0??????1101,??????,???????4-36??? ?
??????????8421 BCD????
98
? 4 36 ???????3??8421BCD????
99
??4-11? ??????????8421 BCD?????? ?
???BCD????????,??BCD??????????BCD???????????????,
????????,????019?8421 BCD?????????????8421
BCD???,????????????????????,????????????(??)??????
??4-17????????019????????8421 BCD???????,??????9?
?????,????9????6(0110)??,?????9?,??????6(0110)????
??8421 BCD????????,????9?,D101,?????D10?????????,
?D101?,??6,D100?????
100
D10????4-17???B41?,D10???1?B40,
B3B2B1B0?1010?1111?,D101?????
?4-37???2???????????????8421
BCD????????,?????????????,??????????????,?????????
??C4?S3? S2?S1?S0,???????????,???(4-20)???8421BCD?
??????
101
? 4 17 ????019?????????8421BCD?
102
? 4 37 ??8421 BCD????
103
4.4 ?????????????
104
??????????????,?????????, ??????????(?????????????
,????????????tpd)??????????0??? ??,????????1????
?? ???4-39????,??????????????????????,?????
?????????,????????????(???????????)???????????????
????????????
105
????????,?????????????4 -
38(b)?A?0?1?????,??????,????????????????????,?????
?????,???????????????
106
? 4 38 ?????????1
107
? 4 39 ?????????2
108
2. ????????? ? ????????????????????
?FXX, ?FXX????,X????????????
?K???????????,??????????????,????????????4-40????,
?K????4 - 40(a),?????????,?????ABC?111??110?,F????
??????????,?????????0,???????1 - 0 - 1??,???????
109
? ?????????????????????????????????????????
??????????? ??????????????????????????,
??????????????,??????????
? 4 40 ?K??????????
110
3. ???????? ???????????,???????,???
???????????????????? ? ? ?????,
????????????,???????????????,?????????????C,??????
?????????,??????4 - 41???????????????C?R?C????????
?????,????????,????????
111
? 4 41 ?????????
112
? ?????,????????????????????,?????????????,
????????, ????????????????????,???????????????????
???,??4-42?????,????????????????,????????,
???????????????????4-42?????,?????????,???????????
?,????????,????????????????
113
? 4 42 ?????????
114
? ??????????????,???4 -
40????,????K???????????????(???4 -
40(b))???????????,???????
??????????????????????????, ?????????????????,????
?????????? ? ?????????????????????????????
????????????????????????????????MSI???????(????)?
, ????????????????