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library ieee;
use ieee.std_logic_1164.all;
entity negadff is
port(
clk : in std_logic;
rst : in std_logic;
d : in std_logic;
q : out std_logic
);
end entity;
architecture arch of negadff is
begin
process (clk, rst)
begin
if rst = '1' then
q <= '0';
elsif falling_edge(clk) then
q <= d;
end if;
end process;
end architecture;
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