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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 reg Q,
    output Qn
);

assign Qn = ~Q;

always @(*) begin
    if (EN) begin
        case ({S, R})
            2'b10: Q <= 1;
            2'b01: Q <= 0;
            2'b11: Q <= 0;
        endcase
    end
end

endmodule

 

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