LPP » INSTRU » VHDLib

h1. IP documentation

h2. General Purpose

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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 |            |

}}