- Question 1 Co2 Po2 A Synchronous Sequential Circuit Is Defined By The Following Boolean Functions With Input X Presen 1 (96.46 KiB) Viewed 17 times
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QUESTION 1 [CO2,PO2] A synchronous sequential circuit is defined by the following Boolean functions with input X, present states PO, P1 and P2 and next states NO, N1 and N2 shown in Figure 1. N2 = X(P1 P.) + X(P1 P.) N = P2 No = P1 Z = X P1 P2 Figure 1 (i) Sketch the logic circuit based on the functions given. (3 marks) (ii) Sketch the state diagram for this sequential circuit. Show all conditions involved. (12 marks) QUESTION 2 [CO2, PO2) A gumball vending machine only receives 10 cent and 20 cent coins to release a capsule of gumball priced at 30 cents. This machine will also return 10 cent balance when 20 cent coins are inserted twice. By stating all assumptions, (a) Create the state machine flow diagram for this gumball vending machine's operation (5 marks) (b) Construct the state transition table for this system. Show the transition on the outputs and present states to get the next states and the output conditions. (5 marks) (c) Develop the suitable equations for your flip-flop inputs and construct the logic circuit for this vending machine sequential system. (10 marks)