Verilog FDCE instance

A Verilog FDCE instance is an instance of a Flip-Flop with Data and Clock Enable. It is a combinational circuit that takes in a data signal, a clock signal, and an enable signal, and outputs the data signal synchronized with the clock signal only when the enable signal is high. The FDCE instance is defined in Verilog using the following syntax:

module FDCE (output reg Q, input D, input CE, input CLK);

always @(posedge CLK)
begin
    if (CE)
        Q <= D;
end

endmodule

In this code, the FDCE module has an output Q that is a registered output (i.e., it is stored in a flip-flop). The input D is the data signal, CE is the clock enable signal, and CLK is the clock signal. The always block triggers on the positive edge of the clock signal, and if the clock enable signal is high (i.e., CE == 1), the data signal D is stored in the flip-flop and output as Q.