QUESTION 1 Use the drop down menu above each of the following steps to indicate

Question

QUESTION 1

Use the drop down menu above each of the following steps to indicate the order in which these steps should be performed when designing combinational logic.

NOTE: No two steps should be assigned the same number and the step to be completed first should be assigned "1."

      -       1.       2.       3.      

Make a schematic of the controller's combinational logic

      -       1.       2.       3.      

Generate a truth table for the combinational logic

      -       1.       2.       3.      

Create Boolean expressions for all outputs of the combinational logic

QUESTION 2

Suppose you are creating a truth table with 3 inputs (a, b, and c) and 1 output (F). If an 'x' symbol indicates "don't care" (the value of the input does not effect the output), how many input combinations are covered by the single row of a truth table shown below?

1

2

3

4

None of the above

QUESTION 3

Suppose you have a 4x1 multiplexer (MUX) whose inputs are shown below in a single row of a truth table. The inputs i0 - i3 are data inputs and s0 and s1 are selector bits. What Boolean value will the data output, d, be for this row?

0

1

2

3

QUESTION 4

Suppose you have a 4x1 multiplexer (MUX) whose inputs are shown below in a single row of a truth table. The inputs i0 - i3 are data inputs and s0 and s1 are selector bits. What Boolean value will the data output, d, be for this row?

0

1

2

3

QUESTION 5

Suppose you have a 4x1 multiplexer (MUX) whose inputs are shown below in a single row of a truth table. The inputs i0 - i3 are data inputs and s0 and s1 are selector bits. What Boolean value will the data output, d, be for this row?

0

1

2

3

QUESTION 6

Suppose you have a 4x1 multiplexer (MUX) whose inputs are shown below in a single row of a truth table. The inputs i0 - i3 are data inputs and s0 and s1 are selector bits. What Boolean value will the data output, d, be for this row?

0

1

2

3

QUESTION 7

Suppose you have a 4x2 priority encoder whose inputs are shown below in a single row of a truth table. The inputs d3 - d0 are inputs and e1 and e0 are output bits. What value will the data outputs, e1 and e0, be for this row (assume d3 is the highest priority input and results in the largest encoded value)?

QUESTION 8

Suppose you have a 4x2 priority encoder whose inputs are shown below in a single row of a truth table. The inputs d3 - d0 are inputs and e1 and e0 are output bits. What value will the data outputs, e1 and e0, be for this row (assume d3 is the highest priority input and results in the largest encoded value)?

QUESTION 9

Select all of the minterms that will be in the Boolean equation that describes the output, f, in the following truth table (a, b, and c are inputs).

a'b'c'

a'b'c

a'bc'

a'bc

ab'c'

ab'c

abc'

abc

Explanation / Answer

1)

The order in which these steps should be performed when designing combinational logic:

Make a schematic of the controller's combinational logic

      -       1.       2.       3.   

Answer 3. It should be performed as 3rd step

Generate a truth table for the combinational logic

      -       1.       2.       3.      

Answer: 2 . This should be carried as second step

Create Boolean expressions for all outputs of the combinational logic

1. 2. 3.

Answer :1. This should be carried as 1st Step.

At first we should write bollean expression of the design. Then we make truth table and simplify boolean expression. And atlast as a 3rd step we draw the scematic of the design.

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