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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
);
	// Write your code here
reg Q_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
end
end
assign Q = Q_reg;
assign Qn = Qn_reg;
endmodule

 

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