ENTITY serial IS
   PORT( 
      addr_gb : IN     std_logic_vector( 7 DOWNTO 0 )  ;
      indirect_sel : IN     std_logic ;
      int_clk : IN     std_logic ;
      int_rst : IN     std_logic ;
      rd_gb : IN     std_logic ;
      rxd : IN     std_logic ;
      wr_gb : IN     std_logic ;
      acknow : OUT    std_logic ;
      rxd_ctrl : OUT    std_logic ;
      txd : OUT    std_logic ;
      txd_ctrl : OUT    std_logic ;
      data_gb : INOUT  std_logic_vector( 7 DOWNTO 0 ) 
   );

END serial ;

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