11/16/2022 0 Comments Fsm serial adder vhdlState diagram for Example 8.1.ģ out 1 = in Done, w C 2 B A No transfer Reset Figure State diagram for Example 8.1.ġ2 Figure 8.12. Signals needed in Example 8.1.Ĭontrol circuit w Clock Done R 1 out 2 in 3 Figure Signals needed in Example 8.1.ġ1 Figure 8.11. Timing diagram for the circuit in Figure 8.8.ġ 2 3 4 5 6 7 8 9 10 Clock w y z Figure Timing diagram for the circuit in Figure 8.8.ġ0 Figure 8.10. Final implementation of the sequential circuit derivedĩ Figure 8.9. Next state Present Output state z w = w = 1 A A B B A C C A C 1 Figure State table for the sequential circuit in Figure 8.3.ĥ Y y 1 1 w Combinational Combinational z circuit circuit Y y 2 2 Clock Figure A general sequential circuit with input w, output z, and two state flip-flops.Ħ Present Next state state w = 1 Output y 2 Y z A 00 01 B 10 C 11 dd d Figure State-assigned table for the sequential circuit in Figure 8.4.ħ y y 2 1 Ignoring don't cares Using don't cares w 00 01 11 10 d Y = wy y Y = wy y 1 1 2 1 1 2 1 1 d y y 2 1 w 00 01 11 10 d Y = wy y + wy y Y = wy + wy 2 1 2 1 2 2 1 2 1 1 d 1 = w ( y + y ) 1 2 y 1 y 2 1 z = y y z = y 1 2 2 1 1 d Figure Derivation of logic expressions for the sequential circuit in Figure 8.6.Ĩ Figure 8.8. State table for the sequential circuit in Figure 8.3. Moore State Machine Model C z 1 = Reset B A w Figure State diagram of a simple sequential circuit.Ĥ Figure 8.4. State diagram of a simple sequential circuit. Sequences of input and output signals.Ĭlockcycle: t t t t t t t t t t t 1 2 3 4 5 6 7 8 9 10 w : 1 1 1 1 1 1 1 z : 1 1 1 Figure Sequences of input and output signals.ģ Figure 8.3. The general form of a sequential circuit.Ĭhapter 8 – Synchronous Sequential Circuits W Combinational Combinational Flip-flops Z circuit circuit Q Clock Figure The general form of a sequential circuit.Ģ Figure 8.2. The general form of a sequential circuit."- Presentation transcript:ġ Figure 8.1.
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