h1. IP documentation

h2. General Purpose

----

h3. Synchronizer


{{collapse(SyncFF)
Sync_FF permit to synchronize a signal A in the clock domain clk. Normally, the A signal must be the output of a FF cloked in an other domain. You shouldtn't have "logic" between the 2 domain.
You can configure the FF number (default 2). This number is depending of the MTBF(Mean Time Between Failure).

p=. !{width: 25%}SYNC_FF.png! <pre><code class="vhdl">
  COMPONENT SYNC_FF_LPP_JCP
    GENERIC (
      NB_FF_OF_SYNC : INTEGER);
    PORT (
      clk    : IN  STD_LOGIC;
      rstn   : IN  STD_LOGIC;
      A      : IN  STD_LOGIC;
      A_sync : OUT STD_LOGIC);
  END COMPONENT;
</code></pre>


|_.Parameter   |_.Type         |_.Size  |_.Description         |_.Default   |
|NB_FF_OF_SYNC |Integer        |        |Number of FF          |2            |
|\5.|
|_.Signal      |_.Direction    |_.Size  |_.Function            |_. Active   |
|clk           |input          |1       |clock                 |rising edge |
|rstn          |input          |1       |reset                 |low         |
|A             |input          |1       |data in               |            |
|A_sync        |ouput          |1       |data out synchronized |            |

}}