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Unformatted text preview: This abs trac ted c irc uit will s upply the s ignals
S2, S1, and S0 to the c irc uit y ou are building in this lab. Thes e three s ignals enc ode information that y ou will us e to generate y our
output s ignals .
The vending mac hine c ontroller will ac c ept only quarters (25 ¢) and dimes (10 ¢), will dis pens e a produc t when the c us tomer ins erts
35 ¢, and will ac c ept only ex ac t c hange totaling 35 ¢ (You need to be ex tra c areful about whic h c oins y ou ac c ept, s o that y ou c an
ac hieve ex ac tly 35¢). Furthermore, the vending mac hine will als o k eep trac k of how muc h money has been ins erted into the vending
mac hine and what c oin was jus t ins erted.
Us e the s pec ific ation below to c ons truc t truth tables and/or Karnaugh maps to derive s imple SOP or POS Boolean ex pres s ions for
the two output s ignals "Ac c ept c oin" (A) and "Paid in full (dis pens e Produc t)" (P).
A = 1, when the c oin that has jus t been ins erted s hould be ac c epted. A = 0, when the c oin that has jus t been in...
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This document was uploaded on 03/22/2014.
- Fall '14