Vending Machine Controller Design Description$/$Specifications

$1.$The machine takes $5$ rupee and $10$ rupee only $($R$5$ and R$10)$

$2.$The machine can dispense:

Water: $15$ rupees$($W$)$

$2.$Cola: $10$ rupees$($C$)$

$3.$Chocolate : $10$ rupees$($CH$)$

$3.$The machine has a Coin Return button $($Cr$)$

Only one input may be active at a time

$5.$A product can be dispensed in one clock cycle

$6.$If more than $15$ rupees are inserted, the money is automatically returned

$7.$If no inputs are active, the state machine stays in the current state

$8.$Outputs:

$1.$CRo: Coin Return Out $($all money in the machine$)$

$2.$Wo: Water Out

$3.$Co: Cola Out

$4.$CHo: Chocolate

$5.$Changeo: Change Out