-- Stimulus process
   stim_proc: process
   begin
      iRESET <= '1';
        wait for iCLK_period*3;
        iRESET <= '0';

        iW <= "00";
        wait for iCLK_period;

        iW <= "01";
        wait for iCLK_period*4;

        iW <= "10";
        wait for iCLK_period;

        iW <= "01";
        wait for iCLK_period;

        iW <= "10";
        wait for iCLK_period;

        iW <= "00";
        wait for iCLK_period;

      -- insert stimulus here

      wait;
   end process;