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-- VHDL data flow description generated from `in_key`

--              date : Sat Sep  1 20:10:14 2001

-- Entity Declaration

ENTITY in_key IS

  PORT (

  clk : in BIT; -- clk

  rst : in BIT; -- rst

  key_sended : in BIT;  -- key_sended

  en_bufin : out BIT;   -- en_bufin

  req_key : out BIT;    -- req_key

  ikey_ready : out BIT; -- ikey_ready

  n_block : out BIT;    -- n_block

  vdd : in BIT; -- vdd

  vss : in BIT  -- vss

  );

END in_key;

-- Architecture Declaration

ARCHITECTURE VBE OF in_key IS

  SIGNAL current_state : REG_VECTOR(2 DOWNTO 0) REGISTER;       -- current_state

  SIGNAL current_state_s7 : BIT;                -- current_state_s7

  SIGNAL next_state_s7 : BIT;           -- next_state_s7

  SIGNAL current_state_s6 : BIT;                -- current_state_s6

  SIGNAL next_state_s6 : BIT;           -- next_state_s6

  SIGNAL current_state_s5 : BIT;                -- current_state_s5

  SIGNAL next_state_s5 : BIT;           -- next_state_s5

  SIGNAL current_state_s4 : BIT;                -- current_state_s4

  SIGNAL next_state_s4 : BIT;           -- next_state_s4

  SIGNAL current_state_s3 : BIT;                -- current_state_s3

  SIGNAL next_state_s3 : BIT;           -- next_state_s3

  SIGNAL current_state_s2 : BIT;                -- current_state_s2

  SIGNAL next_state_s2 : BIT;           -- next_state_s2

  SIGNAL current_state_s1 : BIT;                -- current_state_s1

  SIGNAL next_state_s1 : BIT;           -- next_state_s1

  SIGNAL current_state_s0 : BIT;                -- current_state_s0

  SIGNAL next_state_s0 : BIT;           -- next_state_s0

  SIGNAL next_state : BIT_VECTOR(2 DOWNTO 0);   -- next_state

BEGIN

  next_state(0) <= (next_state_s0 OR next_state_s1 OR next_state_s6

OR next_state_s7);

  next_state(1) <= (next_state_s2 OR next_state_s3 OR next_state_s6

OR next_state_s7);

  next_state(2) <= (next_state_s1 OR next_state_s3 OR next_state_s5

OR next_state_s7);

  next_state_s0 <= ((current_state_s0 AND NOT(key_sended)) OR

current_state_s6);

  current_state_s0 <= (NOT(current_state(2)) AND NOT(current_state(1))

AND current_state(0));

  next_state_s1 <= (current_state_s0 AND key_sended);

  current_state_s1 <= (current_state(2) AND NOT(current_state(1)) AND

current_state(0));

  next_state_s2 <= (current_state_s1 OR (current_state_s2 AND NOT(

key_sended)));

  current_state_s2 <= (NOT(current_state(2)) AND current_state(1) AND

NOT(current_state(0)));

  next_state_s3 <= (current_state_s2 AND key_sended);

  current_state_s3 <= (current_state(2) AND current_state(1) AND NOT(

current_state(0)));

  next_state_s4 <= (current_state_s3 OR (current_state_s4 AND NOT(

key_sended)));

  current_state_s4 <= (NOT(current_state(2)) AND NOT(current_state(1))

AND NOT(current_state(0)));

  next_state_s5 <= (current_state_s4 AND key_sended);

  current_state_s5 <= (current_state(2) AND NOT(current_state(1)) AND

NOT(current_state(0)));

  next_state_s6 <= current_state_s5;

  current_state_s6 <= (NOT(current_state(2)) AND current_state(1) AND

current_state(0));

  next_state_s7 <= '0';

  current_state_s7 <= (current_state(2) AND current_state(1) AND

current_state(0));

  label0 : BLOCK ((NOT((clk'STABLE)) AND clk) = '1')

  BEGIN

    current_state(0) <= GUARDED (next_state(0) OR rst);

  END BLOCK label0;

  label1 : BLOCK ((NOT((clk'STABLE)) AND clk) = '1')

  BEGIN

    current_state(1) <= GUARDED (next_state(1) AND NOT(rst));

  END BLOCK label1;

  label2 : BLOCK ((NOT((clk'STABLE)) AND clk) = '1')

  BEGIN

    current_state(2) <= GUARDED (next_state(2) AND NOT(rst));

  END BLOCK label2;

n_block <= NOT(rst OR (current_state_s0 AND NOT(rst)) OR (

current_state_s6 AND NOT(rst)));

ikey_ready <= (current_state_s6 AND NOT(rst));

req_key <= NOT((current_state_s0 AND NOT(rst) AND key_sended

) OR (current_state_s2 AND NOT(rst) AND key_sended

) OR (current_state_s4 AND NOT(rst) AND key_sended

) OR (current_state_s6 AND NOT(rst)));

en_bufin <= ((current_state_s0 AND NOT(rst) AND key_sended)

OR (current_state_s2 AND NOT(rst) AND key_sended)

OR (current_state_s4 AND NOT(rst) AND key_sended));

END;