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74. Gated SR Latch

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Solving Approach

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Code

module sr_latch_enable (
    input  EN,
    input  S,
    input  R,
    output Q,
    output Qn
);
reg Q_reg;
reg Qn_reg;
always@*
begin
    if (EN) 
    begin
    if(S && R)
    begin
        Q_reg<=1'b0;
        Qn_reg<=1'b1;
    end
    else if(S && !R)
    begin
        Q_reg<=1'b1;
        Qn_reg<=1'b0;
    end
    else if(!S && R)
    begin
        Q_reg<=1'b0;
        Qn_reg<=1'b1;
    end
    else
    begin
        Q_reg<=Q;
        Qn_reg<=Qn;
    end
    end	
end// Write your code here
	assign Q=Q_reg;
    assign Qn=Qn_reg;
endmodule

 

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