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WorksheetsCH06-Sequential Circuits
Total questions: 12
Worksheet time: 11mins
What makes a circuit sequential (vs. combinational)?
Output depends only on inputs
Output depends on current inputs + stored state
Output depends only on previous inputs
Output depends only on the clock
Minimum flip-flops: your ASM has 11 states. How many FFs (binary)?
3
4
5
6
You see an ASM where all outputs are inside state boxes and none on arrows. What model?
Mealy
Moore
Mixed
Neither
Delay insert: Clock T=0.5 s. A motor must start 1.5 s after a button press (Moore; one tick per state). How many extra states?
2
3
4
5
Moore outputs placement In a pure Moore chart, where do outputs belong?
On arrows
In ovals
Inside state boxes
Only at reset
Time across a path: Clock T=0.25 s. Path is S0 → S1 → S2 → S3 (hold **2 ticks total**) → S4. Total time?
1.00 s
1.25 s
1.50 s
1.75 s
If the minimum holds You must show MSG state for 5 s with clock T=0.5 s. How many consecutive states list MSG?
3
4
10
6
Build a 4-second hold in Moore with T=0.5 s. Minimum pattern?
R1(READY) → R2(READY)
R1 → R2 → R3
R1→R2→R3→R4→R5→R6→R7→R8 (8 states)
R1→R2→R3→R4→(loop R4)
Where does reset go and what must it show?
A diamond labeled RESET at the end
A shared diamond before all states
An arrow labeled RESET to the initial state
A Mealy oval at OFF
For the given ASM chart: What is the minimum number of flip-flops (state bits) needed?
2
3
4
5
For the given ASM chart: How many output signals does the system have?
2
3
4
5
For the given ASM chart: Is it a Mealy or Moore state machine?
Mealy
Moore
Both
Neither
