Flip-Flops
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Flip-Flops
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Flip-Flops. RS F lip-flop. S. X. Inputs. Outputs. R. X. RS F lip-flop - definition. RS F lip-flop waveforms. RS Flip-flop. Types of flip-flops: a) dynamic b) synchronized. Example. Example continuation. RS flip-flop formed by cross-coupling NOR gates. - PowerPoint PPT Presentation
Transcript of Flip-Flops
The progression of states by the counter
X3 X2 X1
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
… … …
Counter design:Design rule for RS flip-flops
The present state
The next state S R
0 0 0 d
1 1 d 0
0 1 1 0
1 0 0 1
Counter design: Exercise (RS version)
Design a counter using three RS Flip-Flops
to sequence as follows
A B C
0 0 0
1 1 1
1 0 1
1 1 0
0 0 1
0 1 0
0 0 0
1 1 1
1 0 1
... ... ...
Counter design: Design rule for JK flip-flops
The present state
The next state J K
0 0 0 d
1 1 d 0
0 1 1 d
1 0 d 1
Counter design: Exercise (JK version)
Design a counter using three JK Flip-Flopsto sequence as follows
A B C
0 0 0
1 1 1
1 0 1
1 1 0
0 0 1
0 1 0
0 0 0
1 1 1
1 0 1
... ... ...