Homework Answers
This is basically a universal shift register which does this
| S1S0 | Operation |
| 00 | Load I3 I2 I1 I0 into the A3A2A1A0 |
| 01 | Shift Left A0 to A3(following sequence like A2 to A3) |
| 10 | Shift Right from A3 to A0(following sequence like A3 to A2) |
| 11 | No Change |
Q2
As the flip flops are negative edge triggered hence there will be no changes with rising edges in A3A2A1A0 Hence the answer is A3A2A1A0=1001.
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4) Answer the following questions about the circuit diagrammed below Clear b CLK 4 x1 MUX...
Suppose a sequential logic circuit has an input X and a clock input CLK. The outputs...
Suppose a sequential logic circuit has an input X and a clock input CLK. The outputs are Qi,Qo, and Y, and the next state table is as shown below Q00 X-0 X=1 01 10 01 10 0 0 0 a) Is this a Moore circuit or Mealy circuit? b) What does this cireuit do when the input X - c) What does this circuit do when the input X 1? d) Suppose the initial values of the state are QiQ...
1. a) Complete the waveform templates for the Master –Slave D-flip-flop below with given D, CLK,...
1.
a) Complete the waveform templates for the Master –Slave
D-flip-flop below with given D, CLK, CLEAR, and PRESET signals.
Neglect the propagation delays.
b) Does it have positive or negative edge triggering with
respect to CLK?
c) Are the asynchronous PRESET and CLEAR active-high or
active-low?
2. Enabling of data load in the D-flip-flop was implemented with
a 2-to-1 multiplexer as show below. The D-flip-flop has the
positive edge triggering and the active-low asynchronous clear.
a) Is the Enable...
Problem 7. Consider the 74x194 4-bit bidirectional universal shift register shown below Determine the operation of...
Problem 7. Consider the 74x194 4-bit bidirectional universal shift register shown below Determine the operation of this circuit by filling out the table. Assume that the register is cleared initially as indicated by the first row in the table, and then connected to +5V (before time t), as shown in schematic. Also assume that t 'is that time at which a positive edge occurs in the input signal 'clock'. Si and S0 inputs (given) are used to switch between modes...
3. Answer the following questions about a data flip-flop (D-Flip Flop): a) (4 ps) Write the VHDL required to define a rising-edge triggered (RET) D-Flip Flop with additional clock enable (CEN) an...
3. Answer the following questions about a data flip-flop (D-Flip Flop): a) (4 ps) Write the VHDL required to define a rising-edge triggered (RET) D-Flip Flop with additional clock enable (CEN) and reset inputs. Your reset may be synchronous or asynchronous. Assume any input, output, or signal variables that you require have already been declared in VHDL (you do not have to write the declarations for these) b) [I pal ls your reset syachronous or asynchronous for the D-Flip Flop...
The following is an equivalent way of creating the circuit above. Below is the truth table...
The following is an equivalent way of creating the circuit
above.
Below is the truth table
Q2, Q1, and Q0 are LED outputs from left to right respectively
and D2, D1, and D0 are switches from left to right respectively
Answer the following questions:
1. What signal(s) represent the present state and next state of
the circuit?
2. Sketch a Finite State Machine diagram of the circuit (Be sure
to show inputs and outputs).
3. Describe the high-level behavior of...
Lab Description Follow the instructions in the lab tasks below to behaviorially create and simulate a flip-flop. Af...
Lab Description Follow the instructions in the lab tasks below to behaviorially create and simulate a flip-flop. Afterwards, you will create a register and use your ALU from Lab 3 to create an accumulator-based processor. This will act ike a simple processor; the ALU will execute si operations and each result will be stored in the register. In an accumulator, the value of the register will be updated with each operation; the register is used as an input to the...
A combination circuit is specified by the following Boolean functions listed below. h(a, b, c) = b,c' + a'c Implement the circuit with a 3x8 decoder. Provide truth table and drawing the l...
A combination circuit is specified by the following Boolean functions listed below. h(a, b, c) = b,c' + a'c Implement the circuit with a 3x8 decoder. Provide truth table and drawing the logic/circuit diagram. Use the block diagram for the decoder provided in Figure A4 in supplements. Please label the inputs and outputs clearly. Note: use single 3x8 decoder Question 2 (15 points] A priority encoder is an encoder circuit that includes the Truth Table of a priority function. The...
5) Decoders: Given the following circuit, S0 and S1 are computed using a 4-2 priority encoder with the priorities indicated on the figure. (hint: IDLE signal is always 0, if any of the inputs...
5) Decoders: Given the following circuit, S0 and S1 are computed using a 4-2 priority encoder with the priorities indicated on the figure. (hint: IDLE signal is always 0, if any of the inputs 10,11,12, or 13 is 1) 6 points) 4-to-2 Priority Encoder 10 YO YI 13 IDLE 13> 11 > 12>10 12 Full c Adder So Fill the following table showing the output signals S0 and SI given the input signals w, x, y, a) and z. Prof...
Suppose a sequential logic circuit has an input X and a clock input CLK. The outputs are Qi,Qo, and Y, and the next state table is as shown below Q00 X-0 X=1 01 10 01 10 0 0 0 a) Is this a Moore circuit or Mealy circuit? b) What does this cireuit do when the input X - c) What does this circuit do when the input X 1? d) Suppose the initial values of the state are QiQ...
1.
a) Complete the waveform templates for the Master –Slave
D-flip-flop below with given D, CLK, CLEAR, and PRESET signals.
Neglect the propagation delays.
b) Does it have positive or negative edge triggering with
respect to CLK?
c) Are the asynchronous PRESET and CLEAR active-high or
active-low?
2. Enabling of data load in the D-flip-flop was implemented with
a 2-to-1 multiplexer as show below. The D-flip-flop has the
positive edge triggering and the active-low asynchronous clear.
a) Is the Enable...
Problem 7. Consider the 74x194 4-bit bidirectional universal shift register shown below Determine the operation of this circuit by filling out the table. Assume that the register is cleared initially as indicated by the first row in the table, and then connected to +5V (before time t), as shown in schematic. Also assume that t 'is that time at which a positive edge occurs in the input signal 'clock'. Si and S0 inputs (given) are used to switch between modes...
3. Answer the following questions about a data flip-flop (D-Flip Flop): a) (4 ps) Write the VHDL required to define a rising-edge triggered (RET) D-Flip Flop with additional clock enable (CEN) and reset inputs. Your reset may be synchronous or asynchronous. Assume any input, output, or signal variables that you require have already been declared in VHDL (you do not have to write the declarations for these) b) [I pal ls your reset syachronous or asynchronous for the D-Flip Flop...
The following is an equivalent way of creating the circuit
above.
Below is the truth table
Q2, Q1, and Q0 are LED outputs from left to right respectively
and D2, D1, and D0 are switches from left to right respectively
Answer the following questions:
1. What signal(s) represent the present state and next state of
the circuit?
2. Sketch a Finite State Machine diagram of the circuit (Be sure
to show inputs and outputs).
3. Describe the high-level behavior of...
Lab Description Follow the instructions in the lab tasks below to behaviorially create and simulate a flip-flop. Afterwards, you will create a register and use your ALU from Lab 3 to create an accumulator-based processor. This will act ike a simple processor; the ALU will execute si operations and each result will be stored in the register. In an accumulator, the value of the register will be updated with each operation; the register is used as an input to the...
A combination circuit is specified by the following Boolean functions listed below. h(a, b, c) = b,c' + a'c Implement the circuit with a 3x8 decoder. Provide truth table and drawing the logic/circuit diagram. Use the block diagram for the decoder provided in Figure A4 in supplements. Please label the inputs and outputs clearly. Note: use single 3x8 decoder Question 2 (15 points] A priority encoder is an encoder circuit that includes the Truth Table of a priority function. The...
5) Decoders: Given the following circuit, S0 and S1 are computed using a 4-2 priority encoder with the priorities indicated on the figure. (hint: IDLE signal is always 0, if any of the inputs 10,11,12, or 13 is 1) 6 points) 4-to-2 Priority Encoder 10 YO YI 13 IDLE 13> 11 > 12>10 12 Full c Adder So Fill the following table showing the output signals S0 and SI given the input signals w, x, y, a) and z. Prof...
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