项目五 集成触发器的应用
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Transcript of 项目五 集成触发器的应用
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5.1 5.2 5.3 5.4 555 5.5
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555
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1SS2S1S4
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101 2 3
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5.1.1 RS12RS01 RS 11201101R: ResetS: Set3RS
QnQn+100 00 11 1100 11001101010101XX00 1101
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RSRSRS
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RS CP CP CP
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2. 1CP=1RS
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CP=1CPQnCPQn+1RSR S RS
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0 RS 101
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2. 2
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5.1.3 1. T :01
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2. T :?
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T T T ,T 1
TQnQn+1001101010110
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3. D D D
DQnQn+1001101010011
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4. JK JK
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JK 01 J K 11201101
JKQnQn+100
00
11
1100
11
00
1101
01
01
0101
00
11
10
JKQn+100110101Qn 0 01 1
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CP123
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JK JK JK1 0
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J K 11201101 T T ,T 1 T RS 11201101 D D
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5.2 JK D
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2. JK T
T J=TK=T1T:
T :
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3. D JK
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4. D T T
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5.3
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5.3.1 1. 1
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5.3.2 1. 2. 0101DCP4 4 Q0Q1Q2Q3= 0101 1011101010
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RS 5.3.3
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A01B00RSa bS .
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5.3.4 1. ?
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2.
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555555 555 5.4 555
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555
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1 C1C2 RS G3 TVCCVCCQ5.4.1 555UR1UR2UC1UC22
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555
RD(4) TH (6) TR (2) UO(3)T(7) 0 0 1> (2/3)VCC> (1/3)VCC 0 1< (2/3)VCC< (1/3)VCC 1 1< (2/3)VCC> (1/3)VCC
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NE555555
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5.4.2 5551
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UT+2/3)VCC UT 1/3)VCC UT+ UT 1/3)VCC
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3
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2555
RD(4) TH (6) TR (2) UO(3)T(7) 0 0 1> (2/3)VCC> (1/3)VCC 0 1< (2/3)VCC< (1/3)VCC 1 1< (2/3)VCC> (1/3)VCC
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1 2 3
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3555 2uI=1
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1 2 3
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uOuItw
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twtw()
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5.5
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1.JK JK74LS112(a) (b) 74LS112JKSDRD10 1 74LS112
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2 74LS112
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3 74LS1120110
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2. D D74LS74(a) (b) 1 D74LS74
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2 D74LS74 CP 01
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3 0D1
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a b 74LS74 CP CPCPS3.
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1. 2.RSRS RSJKDTT
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3.RST DTJKDTT 4. 5.DJK
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3.3 3.5 3.6 3.7 3.8