LOGIC DESIGN LABORATORY MANUAL - VTU e-Learning Centre
LOGIC DESIGN LABORATORY MANUAL - VTU e-Learning Centre
LOGIC DESIGN LABORATORY MANUAL - VTU e-Learning Centre
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Logic Design Laboratory Manual 57<br />
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MOD 8 COUNTER:<br />
TRUTH TABLE: Present count next count<br />
Q C Q B Q A<br />
Q C Q B Q A Q C Q B Q A<br />
0 0 0<br />
0 0 0 0 0 1<br />
0 0 1<br />
0 0 1 0 1 0<br />
0 1 0<br />
0 1 0 0 1 1<br />
0 1 1<br />
0 1 1 1 0 0<br />
1 0 0<br />
1 0 0 1 0 1<br />
1 0 1<br />
1 0 1 1 1 0<br />
1 1 0<br />
1 1 0 1 1 1<br />
1 1 1<br />
1 1 1 0 0 0<br />
0 0 0<br />
JK FF excitation table:<br />
Q Q+ J K<br />
0 0 0 X<br />
0 1 1 X<br />
1 0 X 1<br />
1 1 X 0<br />
<strong>DESIGN</strong>:<br />
1 X X 1<br />
1 X X 1<br />
X 1 1 X<br />
X 1 1 X<br />
J A = 1 K A = 1<br />
0 1 X X<br />
X 1 X X<br />
X X 1 0<br />
X X 1 0<br />
J B = Q A<br />
K B = Q A<br />
0 0 1 0<br />
X X X X<br />
X X X X<br />
0 0 1 0<br />
J C = Q B Q A<br />
K C = Q B Q A
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