Serial Adder Moore Model Verilog

Posted By admin On 01/09/21

Machine serial adder keywords d latch finite state machine mealy model multisim serial adder i, while writing the verilog code for 16 bit ripple carry adder the same procedure is used first the verilog code for 1 bit full adder is written from this we can get the 4 bit ripple carry adder now by using this 4 bit ripple carry. Verilog Code For Serial Adder Fsm. Code for serial adder using moore type fsm serial adder verilog 4 bit serial adder when doing digital system. Adder circuit this examples describes a two input 8 bit adder subtractor design in verilog hdl, try the following model i didnt simulate so it should be buggy by definition but it might just work.

Mealy Machine Verilog Code Moore Machine Verilog Code

Bcd Adder Verilog

This page covers Mealy Machine Verilog Code andMoore Machine Verilog Code.

Mealy Machine Verilog code

Four Bit Adder Verilog

Following is the figure and verilog code of Mealy Machine.

module mealy_verilog_code(out, in, rst, clk);
output out;
input in;
input clk, rst;
reg out;
reg[1:0] state;
parameters0=2'd0, s1=2'd1, s2=2'd2, s3=2'd3;
always @(posedge clk or negedge rst)
if(rst0) begin state=s0; out=0; end
else begin
case (state)
s0: if(in0) begin out=0; state=s1; end
else begin out=0; state=s0; end
s1: if(in0) beginout=0; state=s1; end
else begin out=0; state=s2; end
s2: if(in0) begin out=0; state=s3; end
else begin out=0; state=s0; end
s3: if(in0) begin out=0; state=s1; end
else begin out=1; state=s2; end
default: state=s0;
endcase
end
endmodule

1 day ago  Explain with the help of diagram and Verilog code. Question: Question 3: 10 Marks a) Write the Verilog code and testbench for a 16-bit Serial adder using Moore FSM design technique. B) What is a tristate buffer and how is it synthesized using Verilog HDL? Explain with the help of diagram and Verilog. Serial Adder Moore Model Verilog - fasrwap VHDL code for an N-bit Serial Adder with Testbench code Normally an N-bit adder circuit is implemented using N parallel full adder circuits, simply connected next to each other. The advantage of this is that, the circuit is simple to design and purely combinatorial.

Moore Machine Verilog code

Full

Following is the figure and verilog code of Moore Machine.

module moore_verilog_code(out, in, rst, clk);
output out;
input in;
input clk, rst;
reg out;
reg[1:0] state;
parameter s0=2'd0, s1=2'd1, s2=2'd2, s3=2'd3;
always @(posedge clk or negedge rst)
if(rst0) begin state=s0; out=0; end
else begin
case (state)
s0: begin out=0; if(in0) state=s1; else state=s0; end
s1: begin out=0; if(in0) state=s1; else state=s2; end
s2: begin out=0; if(in0) state=s3; else state=s0; end
s3: begin out=1; if(in0) state=s1; else state=s2; end
default: state=s0;
endcase
end
endmodule

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The serial adder is a digital circuit in which bits are added a pair at a time.

Let A and B be two unsigned numbers to be added to produce Sum = A + B. In this we are using three shift registers which are used to hold A, B and Sum. Now in each clock cycle, a pair of bits is added by the adder FSM and at the end of the cycle, the resulting sum is shifted into the Sum register.

Mealy type FSM for serial adder:

Let G and H denote the states where the carry-in-values are 0 and 1. Output value s depends on both the state and the present value of inputs a and b.

In state G and H:

Input valuationOutput (s)State
000FSM will remain in same state G
01,101FSM will remain in same state G
110FSM moves to state H
01,100FSM will remain in same state H
111FSM will remain in same state H
001FSM moves to state G

A single Flip-Flop is needed to represent the two states. The next state and output equations are: Wifikill for windows.

Y = ab + ay + by

s = a ⊕ b ⊕ y

The flip-flop can be cleared by the Reset signal at the start of the addition operation.

Moore type FSM for serial adder:

In a Moore type FSM, output depends only on the present state. Since in both states, G and H, it is possible to produce two different outputs depending on the valuations of the inputs a and b, a Moore type FSM will need more than two states. Therefore we will four states namely: G0, G1, H0 and H1.

The next state and output equations are:

Y1 = a ⊕ b ⊕ y2

Y2 = ab + by2 + by2

s = y1

The only difference between circuits of Mealy and Moore type FSM for serial adder is that in Moore type FSM circuit, output signal s is passed through an extra flip-flop and thus delayed by one clock cycle with respect to the Mealy type FSM circuit.

References: Fundamentals of Digital Logic with VHDL Design