module jk_ff_enable (
input CLK,
input EN,
input J,
input K,
output reg Q
);
always @(posedge CLK) begin
if (EN) begin
case ({J, K})
2'b00: Q <= Q; // HOLD
2'b01: Q <= 1'b0; // RESET
2'b10: Q <= 1'b1; // SET
2'b11: Q <= ~Q; // TOGGLE
endcase
end
end
endmodule