Verilog HDL Program for Parallel In – Serial Out Shift Register

Verilog HDL Program for Parallel In – Serial Out Shift Register.

module piso1(sout,sin,clk);
    output sout;
    input [3:0]sin;
    input clk;
    wire [3:0]q;
    inv u1(p,sl);
    and1 u2(n,sin[1],p);
    and1 u3(r,sl,q[0]);
    or1 u4(s,n,r);
    and1 u5(t,sin[2],p);
    and1 u6(u,sl,q[1]);
    or1 u7(v,u,t);
    and1 u8(w,sin[3],p);
    and1 u9(y,sl,q[2]);
    or1 u10(z,w,y);
    dff1 u11(q[0],sin[0],clk);
    dff1 u12(q[1],s,clk);
    dff1 u13(q[2],v,clk);
    dff1 u14(q[3],z,clk);
    assign sout = q[3];
Simulated Waveform for Parallel In – Serial Out Shift Register
Simulated Waveform for Parallel In – Serial Out Shift Register

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