library ieee;
use ieee.std_logic_1164.all;

entity EXP_FF is
  port(CLK      : in std_ulogic;
       RESET    : in std_ulogic;
       KEY      : in T_DIGITS;
       EXP_TIME : out T_DIGITS);
end EXP_FF;

architecture RTL of EXP_FF is
begin
  process(CLK)
  begin
    if (RESET = '1') then
      -- Assign a default value
    elsif (CLK'event and CLK = '1') then
      -- Check for new input values
    end if;
  end process;
end RTL;