//简单的锁存器 8位数据锁存器：

module ffd (CLR , SET , CE , LOAD , DATA_IN , DATA_OUT , CLK );

input CLR , SET , CE , LOAD , CLK ;

input [7:0] DATA_IN ;

output [7:0] DATA_OUT ;

reg [7:0] DATA_OUT_TEMP;

       always @(posedge CLK )

       begin

              if (CE == 1''b1)

                     if (CLR == 1''b1)

                            DATA_OUT_TEMP = {8{1''b0}};

                     else if (SET == 1''b1)

                            DATA_OUT_TEMP = {8{1''b1}};

                     else if (LOAD == 1''b1)

                            DATA_OUT_TEMP = DATA_IN ;

       end

       assign DATA_OUT = DATA_OUT_TEMP;