package ch_20_04 is

  attribute cell_name : string;

end package ch_20_04;



entity flipflop is

end entity flipflop;



use work.ch_20_04.all;

-- code from book:

architecture std_cell of flipflop is

  attribute cell_name of std_cell : architecture is "DFF_SR_QQNN";

  -- . . .       -- other declarations

begin
  -- . . .
end architecture std_cell;

-- end of code from book



-- code from book:

package model_utilities is

  attribute optimize : string;
  attribute optimize of model_utilities : package is "level_4";

  -- . . .

end package model_utilities;

-- end of code from book

<div align="center"><br /><script type="text/javascript"><!--
google_ad_client = "pub-7293844627074885";
//468x60, Created at 07. 11. 25
google_ad_slot = "8619794253";
google_ad_width = 468;
google_ad_height = 60;
//--></script>
<script type="text/javascript" src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script><br />&nbsp;</div>