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1 Simulations to verify a 4-bit Register Simulate and verify a 4-bit Register using behavioral VHDL code in ModelSim. Recall that sequential circuits depend on both present and past state. Sequential circuits are in contrast to combinational circuits, which depend on input values from only the present state. Fur- thermore, recall that a flip-flop is a fundamental circuit used to create more complex sequential circuits. A register is an array of storage components, such as flip-flops. For example, a 4-bit...
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2. A 4-bit parallel in/serial out shift register has SHIFT/LOAD' and CLK inputs as shown in the figure below. What is the output Q3 at the two times('A' followed by 'B') indicated by the dashed lines in the figure below if the parallel data inputs are DO-1, D1-0, D2-1, and D3-1? D3 SHIFT/L CLK SHIFT /LOAD Ο A. A-0,9:0 B. A:0, B-1 D.A-1, B-1
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Assignment:
Implement an 8 bit register in VHDL/Verilog using Model Sim
software. Show two test cases for data read and write into the
register.
The register has an enable and reset signal. When the reset is
high the register should be cleared. When the enable is high and
reset is low, data should be written into the register.
Hint: The demo code shown below has the implementation for a
4-bit register that can be used as an example.
library ieee;...
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8. Write a complete VHDL code for the 4-bit counter shown below. Reset synchronously returns the output state to 1010. The counting is synchronized to the rising edge of Clk. Reset 1010 0010 1110 1011
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in VHDL
Show synthesizable VHDL code for a register unit that performs operations shown below. The unit has a 3-bit mode (md) input, an asynchronous reset (rs) input, a 1-bit output control (oc) input, and an 8-bit bi-directional io bus. The internal register drives the io bus when oc is ‘I, and md is not “11 1". Use std-logic. md-000: does nothing md-001: right shift the register md-010: left shift the register md 011: up count, binary md-100: down count,...
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Write a VHDL code using processes for the following logic
circuit which include a shift register and 4x1 multiplexer. Use the
entity below.
entity registers_min_max is
port( din : in std_logic_vector(3 downto 0);
reset : in std_logic;
clk : in
std_logic;
sel : in
std_logic_vector(1 downto 0);
reg_out : out std_logic_vector(3
downto 0));
end registers_min_max;
din reset RO clk reset R1 A C clk reset R2 clk reset R3 clk 3 0 sel LE
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6. (20%) Write HDL code to synthesize the following
circuits:
a. 8-bit register.
b. 9-bit Register with Asynchronous Reset
c. N-bit Register with Synchronous Reset where N is a
parameter
d. N-bit register with Enable and Asynchronous reset where N is
a parameter
e. 8-bit latch
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4. Design a 4-bit Adder / Subtractor. Follow the steps given below. (a) Write the VHDL code for a 1-bit Full Adder. The VHDL code must include an entity and an architecture. (b) Draw the circuit diagram for a 4-bit Adder / Subtractor. The circuit diagram may include the following logic elements: 1-bit Full Adders (shown as a block with inputs and outputs) Any 2-input logic gates Multiplexers Do not draw the logic circuit for the 1-bit Full Adder.
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Use the Quartus Prime Text Editor to implement a structural
model of the 4-bit data register shown above in a file named
reg_4bit.sv. Specify the 4-bit data register’s module according to
the interface specification given in the table below.
Port
Mode
Data Type
Size
Description
RST
in
logic
1-bit
Active high asynchronous reset
CLK
in
logic
1-bit
Synchronizing clock signal
EN
in
logic
1-bit
Synchronous clock enable
D
in
logic vector
4-bits
Synchronous data input
Q
out
logic vector
4-bits...
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I need help doing the code using Verilog modelsim
Design a 32-bit register using the D Flip-Flop from part (1)
so that it has the following features:
(a) The Register has these ports
Outputs: Q[31:0]
Inputs: D[31:0]
CLK is the clock signal
EN is a synchronous signal for enabling the register. When EN
is
asserted at the sensitive edge of the CLK, the input D is
loaded
into the register.
RESET We will leave this input unconnected, but will define...
1 Simulations to verify a 4-bit Register Simulate and verify a 4-bit Register using behavioral VHDL code in ModelSim. Recall that sequential circuits depend on both present and past state. Sequential circuits are in contrast to combinational circuits, which depend on input values from only the present state. Fur- thermore, recall that a flip-flop is a fundamental circuit used to create more complex sequential circuits. A register is an array of storage components, such as flip-flops. For example, a 4-bit...
2. A 4-bit parallel in/serial out shift register has SHIFT/LOAD' and CLK inputs as shown in the figure below. What is the output Q3 at the two times('A' followed by 'B') indicated by the dashed lines in the figure below if the parallel data inputs are DO-1, D1-0, D2-1, and D3-1? D3 SHIFT/L CLK SHIFT /LOAD Ο A. A-0,9:0 B. A:0, B-1 D.A-1, B-1
8. Write a complete VHDL code for the 4-bit counter shown below. Reset synchronously returns the output state to 1010. The counting is synchronized to the rising edge of Clk. Reset 1010 0010 1110 1011
in VHDL
Show synthesizable VHDL code for a register unit that performs operations shown below. The unit has a 3-bit mode (md) input, an asynchronous reset (rs) input, a 1-bit output control (oc) input, and an 8-bit bi-directional io bus. The internal register drives the io bus when oc is ‘I, and md is not “11 1". Use std-logic. md-000: does nothing md-001: right shift the register md-010: left shift the register md 011: up count, binary md-100: down count,...
Write a VHDL code using processes for the following logic
circuit which include a shift register and 4x1 multiplexer. Use the
entity below.
entity registers_min_max is
port( din : in std_logic_vector(3 downto 0);
reset : in std_logic;
clk : in
std_logic;
sel : in
std_logic_vector(1 downto 0);
reg_out : out std_logic_vector(3
downto 0));
end registers_min_max;
din reset RO clk reset R1 A C clk reset R2 clk reset R3 clk 3 0 sel LE
4. Design a 4-bit Adder / Subtractor. Follow the steps given below. (a) Write the VHDL code for a 1-bit Full Adder. The VHDL code must include an entity and an architecture. (b) Draw the circuit diagram for a 4-bit Adder / Subtractor. The circuit diagram may include the following logic elements: 1-bit Full Adders (shown as a block with inputs and outputs) Any 2-input logic gates Multiplexers Do not draw the logic circuit for the 1-bit Full Adder.
Use the Quartus Prime Text Editor to implement a structural
model of the 4-bit data register shown above in a file named
reg_4bit.sv. Specify the 4-bit data register’s module according to
the interface specification given in the table below.
Port
Mode
Data Type
Size
Description
RST
in
logic
1-bit
Active high asynchronous reset
CLK
in
logic
1-bit
Synchronizing clock signal
EN
in
logic
1-bit
Synchronous clock enable
D
in
logic vector
4-bits
Synchronous data input
Q
out
logic vector
4-bits...