ENTITY piot_px IS
  GENERIC (
    CONSTANT area : NATURAL := 80000;	
    CONSTANT rup : NATURAL := 402;	
    CONSTANT rdown : NATURAL := 0	
  );
  PORT (
  i : in BIT;	
  b : in BIT;	
  t : out BIT;	
  pad : inout MUX_BIT BUS;	
  ck : in BIT;	
  vdde : in BIT;	
  vddi : in BIT;	
  vsse : in BIT;	
  vssi : in BIT	
  );
END piot_px;

ARCHITECTURE behaviour_data_flow OF piot_px IS
  SIGNAL b1 : BIT;		
  SIGNAL b2 : BIT;		
  SIGNAL b3 : BIT;		
  SIGNAL b4 : BIT;		
  SIGNAL b5 : BIT;		
  SIGNAL b6 : BIT;		

BEGIN
  b6 <= b5;
  b5 <= b4;
  b4 <= b3;
  b3 <= b2;
  b2 <= b1;
  b1 <= b;
  label0 : BLOCK (b6 = '1')
  BEGIN
    pad <= GUARDED i;
  END BLOCK label0;
  t <= pad;

  ASSERT ((((vddi and vdde) and not (vssi)) and not (vsse)) = '1')
    REPORT "power supply is missing on piot_px"
    SEVERITY WARNING;
END;