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Please help me with Question4 on the attached pdf file.

An access control system to enter a higly secret Physics Laboratory consists of a card reader,
a keypad and an eye retina recognizer. The system controls the opening of two doors that lead
to special experiments labs. However, if the system recognizes a dangerous situation may
release into the air a chemical substance to make the person faint or release a sharp lever that
will kill the person.
We want to design the access control system circuit. If the person has the correct card and eye
retina and if the person types in the correct password code then the person will be able to have
one of the doors open to the labs, otherwise the person will be in terrible danger! See Figure 2.
The outputs from the card reader are as follows:
CMPT 150, Spring 2013, SFU Harbour Centre Page 1 of 3 Instructor: Diana Cukierman Assignment#3. Due: Saturday March 9, 9:00 PM. You may work in pairs. If you do so, be responsible and hsare your work with your team mate and you need to also submit a declaration, similarly to the previous assignment. Details about submission are at the end of this document. 1. Let the function F(A,B,C,D) = Σ m (0, 1, 3,, 7, 8, 11, 14). (a) Implement F with one 16x1 MUX (b) Implement F with one 8x1 MUX. (c) Implement F with one 4x16 Decoder and a NOR gate. You do NOT need to do an implementation in DesignWorks for this exercise. 2. Complete the waveform diagram in Figure 1 in paper or Implement the circuit in DesignWorks and provide the corresponding printed waveform diagram/s. The diagram/s should describe the behaviour of the circuit considering 4 additional transitions of the input values ABC additionally to the ones already in the figure. Hint In this figure the input values are ABC = 010, then 110 , then 001 and then 000. Have the transitions occur every 10 ns and consider that both gates have delay = 20ns. Figure 1 – Exercise 2 3. If you haven’t done so for the Guided tutorial #2, then create a parts library called “mylibrary.clf”. In this library construct and place the entity constructed there. A 2x4 decoder with normal (not complemented) enable and normal outputs . As noted in the guided tutorial, this is not the same as the 2x4 decoder that is already provided in “Simulation Logic.clf” which has complemented enable and complemented outputs. You may already have created this entity if you completed the “Guided tutorial # 2” and you may submit and use such. 4. An access control system to enter a higly secret Physics Laboratory consists of a card reader, a keypad and an eye retina recognizer. The system controls the opening of two doors that lead
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CMPT 150, Spring 2013, SFU Harbour Centre Page 2 of 3 Instructor: Diana Cukierman to special experiments labs. However, if the system recognizes a dangerous situation may release into the air a chemical substance to make the person faint or release a sharp lever that will kill the person. We want to design the access control system circuit . If the person has the correct card and eye retina and if the person types in the correct password code then the person will be able to have one of the doors open to the labs, otherwise the person will be in terrible danger! See Figure 2. The outputs from the card reader are as follows: A B C D No card inserted 0 0 0 0 Valid card 0 0 1 0 Valid card 1 1 0 1 Valid card 0 1 1 0 Valid card 1 0 0 1 Dangerous card 0 0 0 1 Special card 1 1 1 1 Figure 2: Exercise 4. To have the labs doors opened the person must type the proper keys on the key-pad and also insert (a valid) card in the reader. The key codes (that the person may type in) are related to the cards: when the card number is not the dangerous card and it is even (considering the card number as ABCD in binary) then the corresponding authorized keypad codes are 01 and 10 (corresponding to input signals EF). The authorized keypad codes for odd numbered cards are 11 and 10. If the card is invalid (i.e. other values than those in the table above) or if the wrong keypad code (for the corresponding card) is entered then the chemical substance is released. The chemical substance is released Retina Recognition Chemical substance Lever Door 1 Door 2
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Hi dcheon. I've found that it's a complex circuit. Yet, I've try to make it easy to... View the full answer

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