Advanced Digital Circuits ECET 146 Week 9. Professor Iskandar Hack ET 221B, 481-5733 [email protected] This Week’s Goals. Assignment of short project – without specific instructions on completing project.
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In state the transition from states S0, S1, S2, and S3 to the next state increment the count to keep track of the number of quarters to refund if the input refund is pressed. You’ll need to use an array of flip-flops for this, look at the earlier example for a counter.
Take the output Vend high during the SVEND state and Low during all others.
Take the output RETURN high during the SREFUND state and Low during all others.
Decrement count each clock cycle during the state SREFUND, and use an IF statement to determine if enough quarters have been refunded.